JP2012079654A - Method of manufacturing electric wire with terminal - Google Patents

Abstract

The present invention provides a method of manufacturing an electric wire with a terminal capable of easily forming a molding material such as a gel-like preservative applied to a connecting portion between a terminal and an electric wire into a predetermined shape.
A conductor Wa that is exposed by removing the outer sheath Wb of the electric wire W is connected to the electric wire connecting portion 4 of the terminal 2 having the terminal portion 3 connected to the counterpart terminal and the electric wire connecting portion 4 at the front and rear. After the first step and the first step, a molding material 5A is applied so as to cover the wire connecting portion 4, and the forming die 10 (upper die 20, lower die) surrounding the upper, lower, left and right sides of the wire connecting portion 4 is applied. 30 and the left and right side molds 40, 40), the molding material 5A is molded into a molded body 5 having a predetermined shape, and the electric wire connecting portion 4 is sealed by the molded body 5.
[Selection] Figure 7

Description

  The present invention relates to a method of manufacturing a terminal-attached electric wire that is preferably used to seal a connection portion between a terminal and an electric wire with a molding material.

  Conventionally, in the electric power field such as an overhead power transmission line, an aluminum electric wire in which a conductor (core wire) made of an aluminum-based material (aluminum or aluminum alloy) is covered with an insulating outer sheath has been used because of its light weight and excellent electrical conductivity. ing. On the other hand, in the fields of automobiles, office automation equipment, home appliances, etc., there is a copper electric wire in which a conductor (core wire) made of a copper-based material (copper or copper alloy) having excellent electrical conductivity is covered with an insulating outer skin. Used as signal lines and power lines.

  In particular, in the automotive field, because of the rapid advancement of high-performance and high-performance vehicles, the current situation is that the number of copper wires used tends to increase with the increase in various on-board electrical devices. is there. Recently, development of electric vehicles and fuel cell vehicles with low environmental impact has been actively carried out. However, in this type of vehicles, it is necessary to extract a large amount of energy from batteries, fuel cells, etc. As the electric wire connected to, an electric wire that is thicker than the conventional one (having a larger cross-sectional area of the conductor) is required.

Under these circumstances, when trying to improve fuel efficiency by reducing the weight of the vehicle, the total weight of the wires used per car can never be neglected, and is subject to weight reduction. It can be. In particular, in electric vehicles, fuel cell vehicles, and the like that have been widely used in recent years, there is a strong desire to make the vehicle lighter as much as possible because the on-board batteries and fuel cells themselves are heavy. Therefore, for the purpose of reducing the weight, an aluminum electric wire using aluminum having a specific gravity of about one-third of copper as a conductor has recently attracted particular attention in the automobile field (in contrast to 8.96 g / cm ^{3 of} copper, Aluminum is 2.70 g / cm ³ ).

  In general, when performing wiring work, not limited to aluminum electric wires, terminals such as crimp terminals are used for connection between electric wires, connection between electric wires and electrical equipment, or the like. Many of such terminals are formed of a copper-based material from the viewpoint of conductivity, economy, etc., and it is sufficient that this copper terminal can be used as a terminal for an aluminum electric wire. There is concern about contact corrosion of dissimilar metals at the connection.

  In this case, since the standard electrode potential of copper is +0.34 V and the standard electrode potential of aluminum is −1.66 V, the difference between the standard electrode potentials is as large as 2.00 V. For this reason, when it gets wet by running, car washing, or dew condensation in the rain, and an electrolyte aqueous solution such as rainwater enters and stays at the connection part of the two conductors, the local battery is made up of aluminum, copper, and the aqueous electrolyte solution. This causes contact corrosion (electric corrosion) between dissimilar metals from which the aluminum serving as the anode of the local battery elutes cations.

  In this way, when the ionization of aluminum, which is electrically base, proceeds and its corrosion is promoted, the contact state of the connection part deteriorates and the electrical characteristics become unstable, and the contact resistance at the connection part increases. Further, there is a possibility that the electrical resistance increases due to the decrease in the diameter of the aluminum conductor due to corrosion, and further, the aluminum conductor is disconnected, which may lead to malfunction of the electrical equipment and stop of the function.

  In order to prevent such contact corrosion (electric corrosion), conventionally, a water-resistant anticorrosive (molding material) is applied to the place where the dissimilar metals are in contact (connecting part), and the part is sealed with the anticorrosive. A method of stopping and waterproofing may be employed. FIG. 16 shows a terminal-attached electric wire 100 to which a copper terminal 2 and an aluminum electric wire W that are conventionally used are connected.

  The copper terminal 2 includes a terminal portion 3 that is a connection portion with a counterpart terminal (not shown), and an electric wire connection portion 4 that extends backward from the terminal portion 3. The aluminum electric wire W has a structure in which an aluminum conductor Wa is covered with an insulating outer skin Wb, and the end of the aluminum conductor Wa exposed by peeling off the outer skin Wb is connected to the electric wire connecting portion 4 of the copper terminal 2. Is connected. The electric wire connecting portion 4 includes a pair of conductor crimping pieces (wire barrels) 4a, 4a to be crimped to the aluminum conductor Wa and a pair of outer crimping pieces (insulation barrels) 4b, 4b to be crimped to the outer skin Wb. Arranged and provided.

  In such a wire connecting portion 4 of the terminal-attached electric wire 100, when this portion is wetted by rainwater or the like, the above-described contact corrosion between different metals of aluminum and copper occurs, and in order to prevent this, FIG. As shown in FIG. 2, the anticorrosive agent 500 is applied to a portion where the wire connecting portion 4 and the aluminum conductor Wa are in contact with each other. Specifically, a portion of the aluminum conductor Wa projecting (exposed) forward from the conductor crimping piece 4a and a portion projecting (exposed) rearward from the conductor crimping piece 4a, that is, the conductor crimping piece 4a and the outer skin crimping piece 4b. The anticorrosive agent 500 is applied so as to cover (seal) the exposed aluminum conductor Wa. In this case, the anticorrosive agent 500 is applied so as to cover the upper portions of the conductor crimping piece 4a and the outer skin crimping piece 4b.

  This anticorrosive agent 500 is heated to a high temperature at the time of application and is in a gel state (hereinafter referred to as a “gel state” including a liquid state when melting progresses). When cooled to room temperature, the gel-like anticorrosive 500 is solidified and fixed to the wire connection portion 4. Moreover, since the anticorrosion agent 500 when applied from above the wire connection portion 4 is in a gel form, the wire connection portion 4 is covered with a round shape by its surface tension, and the roundness is rounded. Solidify in the same shape. In addition, the following patent document is mentioned as a prior art document relevant to this invention.

JP 2004-14223 A JP 2002-367551 A

  However, when the anticorrosive agent 500 is solidified in such a rounded shape, as shown in FIG. 18, when the copper terminal 2 is inserted into the terminal housing hole 7 a having, for example, a quadrangular section in the connector housing 7. In addition, the solidified anticorrosive 500 interferes with the entrance of the terminal accommodating hole 7a, so that the copper terminal 2 cannot be accommodated in the terminal insertion hole 7a (see FIG. 18A), or the solidified anticorrosive 500 is a terminal. There was a problem (see FIG. 18B) in which the inner wall of the accommodation hole 7a interferes with and peels off from the wire connection portion 4. Further, as shown in FIG. 18B, the retainer 8 for detecting whether or not the terminal portion 3 is inserted to a predetermined position of the terminal accommodating hole 7a and the solidified anticorrosive agent 500 interfere with each other. As a result, there has been a problem that the retainer 8 cannot be mounted in the retainer mounting hole 7b.

  Thus, if the gel-like anticorrosive agent 500 is simply applied to the wire connection portion 4 and solidified, the cross-sectional area of the portion may become larger than the cross-sectional area of the terminal portion 3, and the terminal of the connector housing 7 The terminal part 3 can be inserted in the accommodation hole 7a, but the malfunction that the electric wire connection part 4 cannot be inserted, and the malfunction that the solidified anticorrosive 500 peels generate | occur | produce.

  In order to prevent the wire connection portion 4 from becoming thicker than the terminal portion 3 by the anticorrosive agent (molding material) 500 applied in this way, a concave portion (cavity) having a predetermined shape is formed in a mold that can be divided into two. The so-called insert molding method (inserting other parts in the molded body) in which the wire connecting portion 4 is placed in the recess to seal the recess and the anti-corrosion agent (molding material) 500 is filled in the sealed recess. It is possible to arrange the outer shape of the anticorrosive agent (molding material) so that it does not become thicker than the terminal portion 3 by employing the molding method.

  Therefore, the problem to be solved by the present invention is to provide a method for producing a terminal-attached electric wire, which can easily form a molding material such as a gel-like preservative applied to the connection portion between the terminal and the electric wire into a predetermined shape. Is to provide.

  In order to solve the above problems, the method of manufacturing a terminal-attached electric wire according to the present invention removes the outer sheath of the electric wire to the electric wire connecting portion of the terminal having the terminal portion connected to the counterpart terminal and the electric wire connecting portion at the front and rear. A first step of connecting the exposed conductor; and after the first step, a molding material is applied so as to cover the wire connection portion, and the molding is performed in a mold that surrounds the top, bottom, left, and right of the wire connection portion. And a second step of forming the material into a molded body having a predetermined shape and sealing the electric wire connection portion with the molded body.

  According to the method of manufacturing a terminal-attached electric wire having such a configuration, the molding material applied to the electric wire connecting portion of the terminal is formed into a molded body having a predetermined cross section (outer shape), for example, the cross section (outer shape) is a connector. It can be molded (molded) into a molded body having a size and shape that can be inserted into the terminal insertion hole of the housing. This prevents the above-described problem that the molding material (molded body) solidified in the terminal housing hole of the connector housing interferes, as in the case where the molding material is simply applied to the electric wire connection portion. In addition, the mold used has a simple configuration that surrounds the upper and lower sides and the right and left sides of the electric wire connection portion, and does not surround the front and rear sides of the electric wire connection portion, that is, a configuration that does not completely seal the electric wire connection portion. The manufacturing cost of the mold can be made lower than the manufacturing cost of the insert molding die described above.

  In addition, the molding die is disposed above the electric wire connection part to mold the upper surface of the molded body, and the lower mold is disposed below the electric wire connection part to mold the lower surface of the molded body. And the left and right side molds that are respectively arranged on the left and right sides of the wire connecting portion and respectively mold the left and right side surfaces of the molded body, and the upper mold is an upper opening between the left and right side molds. The lower mold is provided so that it can be inserted from below into the lower opening between the left and right side molds. In the second step, the lower mold and the left and right side molds are provided. The molding material is applied to the wire connection portion surrounded by the upper die, and the upper die is closed with the upper die between the left and right side die. Down to a predetermined position, or the lower mold is May a configuration which is adapted to rise to a predetermined position with respect to the left and right sides type.

  According to such a configuration, the upper mold, the lower mold, and the left and right side molds are used as the mold for enclosing the upper, lower, left, and right sides of the electric wire connection portion, and the electric wire connection portion is surrounded by the lower mold and the left and right side molds. After applying the material and closing the upper opening between the left and right side molds with the upper mold, the upper mold and the left and right side molds are lowered to a predetermined position with respect to the lower mold, or the lower mold is both the upper mold and the left and right sides By raising the mold to a predetermined position, that is, when the upper mold and the lower mold are close to each other by a predetermined length, the molding material applied to the wire connection portion is sandwiched between the upper mold and the lower mold. Will be pressurized. Thereby, it is possible to shape | mold the molding material apply | coated to the electric wire connection part into the molded object by which the cross section (outer shape) was prepared in the predetermined shape. In addition, as these upper mold, lower mold, and left and right side molds, those having a simple configuration such as a metal flat plate can be applied, so that they can be manufactured at a lower cost than the mold for insert molding described above. it can.

  In this case, the upper mold is formed with an inflow prevention wall disposed between the terminal portion of the terminal and the wire connecting portion so as to protrude downward. In the second step, the upper mold It is preferable that the molding material applied to the wire connection portion is prevented from flowing into the terminal portion by the inflow prevention wall. According to such a configuration, for example, when the gel-like molding material applied to the electric wire connecting portion is sandwiched and pressed between the upper die and the lower die, the terminal portion that is a connecting portion with the counterpart terminal It is prevented from flowing into. Thereby, generation | occurrence | production of malfunctions, such as a contact failure with an other party terminal, is prevented.

  The inflow prevention wall may be provided so as to be separate from the upper mold. According to such a configuration, for example, when the molding material is gelled (melted) at high temperature and solidified (solidified) at room temperature, the upper mold before contacting the molding material is removed. Although it is necessary to heat in advance, the inflow prevention wall is provided separately from the heated upper mold, that is, the inflow prevention wall is not heated, so that the molding material is brought to this room temperature. Can be cooled and solidified by contact with the inflow prevention wall. This further suppresses the molding material from flowing into the terminal portion that is the connection portion with the counterpart terminal.

  In this case, the rear end surface of each of the upper mold, the lower mold, and the left and right side molds is a position separated by a predetermined length rearward from the end portion of the outer sheath of the electric wire connected to the electric wire connecting portion of the terminal. It is good to make it the structure which was arrange | positioned. When providing the inflow prevention wall described above, that is, when preventing the flow of the molding material from the electric wire connection portion to the terminal portion, the molding material is the terminal portion when sandwiched between the upper mold and the lower mold and pressed. When the molding material that has flowed out to the wire side protrudes outward from the mold (upper mold, lower mold, and left and right side molds), the outer side The protruding molding material cannot be molded into a predetermined shape, and the portion may interfere with the terminal receiving hole of the connector housing. Therefore, the rear end surface of each of the upper mold, the lower mold, and the left and right side molds is arranged at a position away from the end of the outer sheath of the electric wire connected to the electric wire connecting portion of the terminal by a predetermined length. By forming the upper mold, the lower mold, and the left and right side molds into a shape that extends further from the electric wire connection portion in the electric wire side direction, the molding material that has flowed out to the electric wire side is formed into the molding mold (the upper mold, the lower mold, and the left and right molds). From being protruded from both sides).

  Furthermore, in the second step, the terminal portion of the terminal may be cooled. In this case, for example, when the molding material is gelled (melted) at high temperature and solidified (solidified) at room temperature, the terminal is provided even if the above-described inflow prevention wall is not provided. By cooling the part, the tip of the molding material that flows from the wire connection part toward the terminal part can be cooled and solidified at a position near the inlet of the terminal part, and further from that position to the back side of the terminal part It is possible to prevent the molding material from flowing in. In this case, you may make it the structure which used cooling of the terminal part and the inflow prevention wall together. When the viscosity of the molding material is small, it may not be possible to prevent the molding material from flowing into the back side of the terminal part only by cooling the terminal part. It is preferable to use a structure in which

  Further, the upper mold is inserted with a nesting mold in which a hole for removing air bubbles is opened so as to move up and down. In the second step, the lower surface of the nesting mold is separated from the lower surface of the upper mold. The upper mold in a state where it is raised to a predetermined position is lowered to a predetermined position with respect to the lower mold together with the left and right side molds, or the lower mold has a lower surface of the nesting mold predetermined from a lower surface of the upper mold. It is preferable that the lower surface of the nested mold is lowered to the lower surface position of the upper mold after the upper mold and the left and right side molds are raised to a predetermined position. For example, when the conductor of the electric wire has a configuration in which a plurality of strands are bundled, air exists in the gaps between the strands, so that the applied molding material penetrates into the gaps between the strands. Air may escape from the molding material as bubbles. Therefore, while inserting a nesting die having an opening for removing air bubbles into the upper die so as to be movable up and down, the gel-like molding material applied to the wire connection portion is sandwiched between the upper die and the lower die. When pressure is applied, the lower surface of the nested mold is raised to a predetermined position from the lower surface of the upper mold, and when the bubbles are almost removed from the molding material, the lower surface of the nested mold is moved to the lower surface of the upper mold. By lowering to the position, the molding material can be molded into a molded body having no bubbles inside or on the surface.

  Furthermore, in the second step, it is preferable that the upper mold and the lower mold before surrounding the wire connecting portion are heated in advance. For example, when the molding material is gelled (melted) at high temperature and solidified (solidified) at room temperature, the upper and lower molds are gelled when applied to the wire connection part. If heated in advance so as to be substantially the same as the temperature of the material, the gel-like molding material applied to the wire connection portion is prevented from cooling and solidifying at the same time as contacting the upper mold and the lower mold. .

  In the second step, after the upper mold and the left and right side molds are lowered to a predetermined position with respect to the lower mold, or the lower mold is relative to the upper mold and the left and right side molds. It is preferable that the upper mold and / or the lower mold be cooled after rising to a predetermined position. When the molding material applied to the wire connection is gelled (melted) at high temperature and solidified (solidified) at room temperature, it is sandwiched between the upper and lower molds and pressed As it is, the gel-like molding material can be cooled and solidified by either or both of the upper mold and the lower mold, so that it can be easily molded into a molded body having a predetermined shape.

  Further, after the second step, a third step is provided that enables the molded body to be removed from the mold, and in the third step, the upper die is slid in either the left or right lateral direction. Then, the lower mold may be raised with respect to the left and right side molds, or the left and right side molds may be lowered with respect to the lower mold.

  The molded body in a state where the molding material is solidified may be adhered to the inner surface (mold surface) of the mold (upper mold, lower mold, and both left and right molds). In such a case, if the upper mold is removed upward with respect to the upper surface of the molded body, a tensile load is applied to the upper surface of the molded body, and the molded body may be peeled off from the wire connection portion. Therefore, the upper mold in a state where the upper opening between the left and right molds is closed is slid as it is in either the left or right lateral direction, and the lower surface (mold surface) of the upper mold and the upper surface of the molded body are bonded. Try to shear the part. Thereby, an upper mold | type can be favorably peeled from the upper surface of a molded object.

  Similarly, if the left and right side molds are removed in the left-right direction with respect to the left and right side surfaces of the molded body, a tensile load is applied to the left and right side surfaces of the molded body, and the molded body may be peeled off from the wire connection portion. Therefore, the lower mold is raised with respect to the left and right molds, or the left and right molds are lowered with respect to the lower mold, and the inner surface (mold surface) of the left and right molds is bonded to the left and right side surfaces of the molded body. Try to shear the part. Thereby, the left and right side molds can be favorably peeled from the left and right side surfaces of the molded body. And finally, a molded object (electric wire connection part) can be taken out by removing a molded object from a lower mold | type.

  In this case, the inner surface of each of the upper mold, the lower mold, and the left and right side molds may be provided with a coating that improves the releasability from the molded body. According to such a configuration, since the adhesive force between the molded body and the mold is reduced, it is possible to prevent the molded body from being deformed or damaged when the molded body is taken out from the mold. it can. Examples of the coating that improves the mold releasability (peelability) of the mold from such a molded body include fluorine coating.

  The terminal may be a copper terminal made of copper or a copper alloy, and the electric wire may be an aluminum electric wire formed by covering an aluminum or aluminum alloy conductor with an insulating outer skin. In particular, when the terminal is a copper terminal made of copper or a copper alloy and the electric wire is an aluminum electric wire in which a conductor made of aluminum or an aluminum alloy is covered with an insulating outer sheath, the electric wire connecting portion is Since it is sealed by the molded body, rainwater or the like is prevented from entering the electric wire connecting portion (a connecting portion between aluminum and copper), and as a result, electrolytic corrosion of aluminum is prevented.

  In this case, the molding material is preferably an anticorrosive. Corrosion of the wire connection portion of the terminal is further prevented, and the connection reliability with the conductor of the wire can be improved.

  According to the method for manufacturing a terminal-attached electric wire according to the present invention, for example, the molding material applied to the electric wire connection portion of the terminal has a cross-section (outer shape) that can be inserted into the terminal insertion hole of the connector housing. It can be molded (molded) into a molded body. This prevents the above-described problem that the molding material (molded body) solidified in the terminal housing hole of the connector housing interferes, as in the case where the molding material is simply applied to the electric wire connection portion.

It is the appearance perspective view showing the schematic structure of the forming die used for the manufacturing method of the electric wire with a terminal concerning one embodiment of the present invention. (A) is a longitudinal cross-sectional view of the shaping | molding die of FIG. 1, (b) is a cross-sectional view of (a). (A) is the longitudinal cross-sectional view which showed the state which installed the electric wire with a terminal in the lower mold | type and side mold | type of FIG. 2, (b) is a cross-sectional view of (a). (A) is the longitudinal cross-sectional view which showed the state which apply | coated the molding material to the electric wire connection part of the electric wire with a terminal of FIG. 3, (b) is a cross-sectional view of (a). (A) is the longitudinal cross-sectional view which showed the state which has arrange | positioned the upper mold | type above the electric wire connection part of the electric wire with a terminal of FIG. 4, (b) is a cross-sectional view of (a). (A) is the longitudinal cross-sectional view which showed the state which the upper mold | type closed the upper opening part between the side mold | types of FIG. 5, (b) is a cross-sectional view of (a). (A) is the longitudinal cross-sectional view which showed the state which lowered | hung the upper type | mold and side type | mold of FIG. 6 to the predetermined position with respect to the lower type | mold, (b) is a cross-sectional view of (a). (A) is the longitudinal cross-sectional view which showed the state which slid so that the upper mold | type of FIG. 7 might open the upper opening part between side mold | types, (b) is a cross-sectional view of (a). (A) is the longitudinal cross-sectional view which showed the state which lowered | hung the side type | mold of FIG. 8 to the predetermined position with respect to the lower mold | type, (b) is a cross-sectional view of (a). It is the external appearance perspective view which showed the state by which the electric wire connection part of the electric wire with a terminal was sealed with the molded object. (A) is a longitudinal sectional view showing a state in which the electric wire with terminal of FIG. 10 is inserted into the terminal housing hole of the connector housing, and (b) is a longitudinal sectional view showing a state in which the retainer of (a) is inserted to a predetermined position. FIG. It is the longitudinal cross-sectional view which showed embodiment which concerns on a 1st modification. It is the longitudinal cross-sectional view which showed embodiment which concerns on a 2nd modification. It is the longitudinal cross-sectional view which showed embodiment which concerns on a 3rd modification. It is the longitudinal cross-sectional view which showed embodiment which concerns on a 4th modification. It is the external appearance perspective view which showed the electric wire with a terminal used conventionally. It is the external appearance perspective view which showed the state which apply | coated and solidified the anticorrosive agent to the electric wire connection part of the electric wire with a terminal of FIG. (A) is the longitudinal cross-sectional view which showed the state which the anticorrosive provided in the electric wire with a terminal of FIG. 17 interferes with the entrance of the terminal accommodation hole of a connector housing, (b) is provided in the electric wire with a terminal of FIG. It is the longitudinal cross-sectional view which showed the state in which the anticorrosive agent peeled in the terminal accommodation hole of the connector housing, and the state which the retainer has interfered with the anticorrosive agent.

  Below, one Embodiment of the manufacturing method of the electric wire with a terminal which concerns on this invention is described in detail with reference to drawings. In the following description, the terminal portion side of the terminal is assumed to be the front, and the opposite side is assumed to be the rear. For example, in FIG. 1, the lower left side is the front and the upper right side is the rear, and in FIG. 2A, the left side is the front and the right side is the rear.

  As shown in FIG. 1, the electric wire with terminal 1 includes a copper terminal 2 and an aluminum electric wire W connected to the copper terminal 2. In this case, in the aluminum electric wire W, the aluminum conductor Wa is covered with an insulating outer skin Wb, and the electric wire connecting portion 4 of the copper terminal 2 is connected to the aluminum conductor Wa exposed by peeling off the outer skin Wb. .

  The copper terminal 2 is formed by punching and bending a copper plate or the like, and includes a terminal portion 3 that is a connection portion with a counterpart terminal (not shown) and a wire connection portion 4 that extends backward from the terminal portion 3. I have. The terminal portion 3 has a so-called female terminal shape, and is provided with an elastic contact piece 3 a formed by being folded inside the terminal portion 3.

  The electric wire connecting portion 4 includes a pair of conductor crimping pieces (wire barrels) 4a and 4a that are crimped to the aluminum conductor Wa and a pair of outer sheath crimping pieces (insulation barrels) 4b and 4b that are crimped to the outer skin Wb. The conductor crimping pieces 4a and 4a and the outer skin crimping pieces 4b and 4b are crimped by a crimping device (not shown), and the copper terminal 2 is connected to the aluminum electric wire W.

  A molded body 5 as shown in FIG. 10 is formed (molded) on the wire connecting portion 4 of the terminal-attached electric wire 1 by a molding die 10 as shown in FIG.

  As shown in FIGS. 1 and 2, the mold 10 includes an upper mold 20, a plurality of lower molds 30, 30, 30, 30 and a plurality of side molds 40, 40, 40, 40, 40. The upper die 20 is formed by cutting or the like from a metal square, and has a substantially rectangular parallelepiped shape that is long in the X direction and includes a lower surface (upper die surface) 21 that protrudes downward in a predetermined shape. is doing.

  In this case, the lower surface (upper mold surface) 21 has a first plane 21a extending horizontally from the front end toward the rear (Y direction), and an inclination extending obliquely upward from the rear end of the first plane 21a. It has the surface 21b and the 2nd plane 21c extended horizontally from the rear end of this inclined surface 21b. The lower surface (upper mold surface) 21 of the upper mold 20 is for molding the upper surface of the molded body 5 shown in FIG. Further, the upper mold 20 includes a heater 22 as a heating means, and the upper mold 20 can be heated to a predetermined temperature by driving the heater 20.

  The lower mold 30 is formed by cutting or the like from a metal square, and includes a flat upper surface (lower mold surface) 31 extending horizontally from the front to the rear (Y direction), and Z It has a substantially rectangular parallelepiped shape extending in the direction. In this case, the upper surface (lower mold surface) 31 of the lower mold 30 is for forming the lower surface of the molded body 5 shown in FIG. Further, four lower molds 30 are erected on the flat base 32 so as to be arranged at equal intervals along the X direction. Further, the lower mold 30 includes a heater 33 as a heating means, and the lower mold 30 can be heated to a predetermined temperature by driving the heater 33.

  Further, the lower end of the lower mold 30 is connected to a cooling body 34, and the temperature of the lower mold 30 raised by the heater 33 by the cooling body 34 can be cooled to about room temperature. In this case, a plurality of flow paths 34a through which the cooling liquid flows are formed inside the cooling body 34. In this flow path 34a, for example, a radiator, which is an air-cooled heat exchanger (not shown), and the radiator A pump that circulates the coolant between the cooling body 34 and the cooling body 34 is connected by piping.

  The side mold 40 is formed by cutting or the like from a metal square, has a flat side surface 41 extending in the vertical direction (Z direction), and has a substantially rectangular parallelepiped shape extending in the Y direction. . In this case, the inner side surfaces (left and right mold surfaces) 41, 41 of the adjacent side molds 40, 40 are for molding the left and right side surfaces of the molded body 5 shown in FIG. Further, five side molds 40 are erected on the upper surface 42a of the flat base plate 42 so as to be arranged at equal intervals along the X direction, and between the adjacent side molds 40, 40, A lower opening 43 into which the lower mold 30 is inserted is opened.

  The upper surface 44 of the side mold 40 has a first plane 44a extending horizontally from the front end toward the rear (Y direction) so as to match the shape of the lower surface 21 of the upper mold 20, and the first plane 44a. It has an inclined surface 44b extending obliquely upward from the rear end and a second flat surface 44c extending horizontally from the rear end of the inclined surface 44b. In this case, the upper upper opening 45 between the adjacent side molds 40, 40 can be opened and closed by the lower surface 21 of the upper mold 20. Further, the side mold 40 is formed such that the height from the upper surface 42a of the base plate 42 is higher than the height of the molded body 5 shown in FIG.

  Further, a front stop wall 42b is erected on the front end of the upper surface 42a of the base plate 42. As shown in FIG. 3A, the front end surface of the terminal portion 3 of the terminal-attached electric wire 1 is connected to the front stop wall 42b. The wire connection portion 4 of the terminal-attached electric wire 1 is positioned at a predetermined position between the side molds 40 and 40 by being brought into contact with the rear surface.

  As shown in FIG. 2A, the base plate 42 on which the side mold 40 is erected is fixed to the pedestal 32 via a cylinder 46. In this case, the lower end of the cylinder 46 is fixed on the pedestal 32, and the tip of the rod 46 a that can extend and contract in the vertical direction (Z direction) is connected to the lower surface of the base plate 42. Therefore, the side mold 40 (base plate 42) can be moved up and down in the vertical direction (Z direction) with respect to the lower mold 30 by driving the cylinder 46.

  2A and 2B, the upper mold 20 is connected to the tip of a rod 23a of a cylinder 23 that moves the upper mold 20 up and down in the vertical direction (Z direction). The cylinder 23 is attached to a slider 24 that moves the cylinder 23 together with the upper mold 20 in the horizontal direction (X direction) with respect to the lower mold 30 and the side mold 40. In this case, the slider 24 is fixed to a frame (not shown). Therefore, the upper mold 20 can be moved up and down in the vertical direction (Z direction) by driving the cylinder 23, and can be moved (slid) in the left and right horizontal direction (X direction) by driving the slider 24. .

  Next, the operation procedure of the upper mold 20, the lower mold 30, and the side mold 40 provided in such a mold 10 will be described with reference to FIGS.

  As shown in FIGS. 3A and 3B, the lower mold 30 is inserted into the lower opening 43 below the adjacent side molds 40, 40, and the upper surface (lower side) of the lower mold 30 is inserted. The base plate 42 is raised or lowered by driving the cylinder 46 so that the mold surface 31 and the upper surface 42a of the base plate 42 are substantially flush with each other. Then, while positioning the front end face of the terminal portion 3 of the electric wire with terminal 1 in contact with the rear surface of the front stop wall 42b of the base plate 42, the electric wire connecting portion 4 of the electric wire with terminal 1 is placed between the side molds 40, 40. It is placed on the upper surface 31 of the lower mold 30 inserted in. Thereby, the electric wire connection part 4 of the electric wire 1 with a terminal is below the upper surface (lower mold surface) 31 of the lower mold 30 and the side surfaces (left and right mold surfaces) 41, 41 of the left and right side molds 40, 40. And the left and right will be surrounded. At this time, the lower mold 30 is heated to a predetermined temperature in advance by driving a built-in heater 33, and heat is conducted from the lower mold 30 to the electric wire connecting portion 4 placed on the upper surface 31 thereof. Thus, the electric wire connecting portion 4 is heated. Similarly, the upper mold 20 is also preheated to a predetermined temperature by driving a built-in heater 22.

  This is because the upper mold 20 is formed when the molding material 5A made of an anticorrosive agent or the like to be applied to the wire connection portion 4 is gelled (melted) at high temperature and solidified (solidified) at room temperature. And the lower mold 30 is heated (preheated) in advance so as to be substantially the same as the temperature of the gelled molding material 5A, so that the gel-shaped molding material 5A comes into contact with the upper mold 20 and the lower mold 30. This is to prevent cooling and solidifying at the same time. The upper die 20 is arranged by driving the slider 24 at a predetermined standby position apart from the lower die 30 and the side die 40 as shown.

  Next, as shown in FIGS. 4A and 4B, a molding material 5 </ b> A made of a corrosion inhibitor or the like is applied from above the wire connection portion 4 of the terminal-attached electric wire 1 using a dispenser 51. At this time, the gel-like molding material 5A applied to the wire connecting portion 4 spreads in the space surrounded by the left and right side molds 40, 40 and the lower die 30, and the periphery of the wire connecting portion 4 is formed by this molding. It is covered with the material 5A. In this case, the molding material 5 </ b> A is quantitatively applied by the dispenser 51 so that the height of the molding material 5 </ b> A after application is slightly lower than the upper surface 44 of the side mold 40. At this time, since the molding material 5 </ b> A is in a gel state, the molding material 5 </ b> A has a rounded shape so as to rise on the wire connection portion 4.

  Next, as shown in FIGS. 5A and 5B, the upper mold 20 is moved laterally by driving the slider 24 so that all the side molds 40 overlap with each other when viewed from above. Place above. Thereafter, as shown in FIGS. 6A and 6B, when the upper die 20 is lowered by driving the cylinder 23, the lower surface 21 of the upper die 20 and the upper surface 44 of the side die 40 are brought into contact with each other, and adjacent to each other. The upper opening 45 between the mating side molds 40, 40 is closed by the lower surface 21 of the upper mold 20.

  Next, as shown in FIGS. 7A and 7B, the upper mold 20 and the side mold 40 are moved to a predetermined position with respect to the lower mold 30 by driving the cylinder 23 or simultaneously driving the cylinder 23 and the cylinder 46. To lower. As a result, the molding material 5A applied to the wire connection portion 4 is sandwiched between the lower surface (upper mold surface) 21 of the upper mold 20 and the upper surface (lower mold surface) 31 of the lower mold 30 and added. It will be pressed. At this time, in the space (cavity) surrounded by the upper mold 20, the lower mold 30, and the left and right side molds 40, the molding material 5 </ b> A that is rounded so as to rise on the electric wire connection portion 4. The cross section is arranged in a substantially square shape.

  In this state, the driving of the heater 22 built in the upper mold 20 and the driving of the heater 33 built in the lower mold 30 are stopped, and the flow path 34a of the cooling body 34 connected to the lower end of the lower mold 30 is stopped. The lower mold 30 is cooled to about room temperature by flowing a cooling liquid over it. Along with this, the molding material 5 </ b> A and the wire connecting portion 4 that are in contact with the upper surface 31 of the lower mold 30 are also cooled. As a result, the molding material 5A applied to the wire connection portion 4 is cooled and solidified, and is molded (molded) into a molded body 5 having a predetermined cross section.

  Next, as shown in FIGS. 8A and 8B, the upper mold 20 that has closed the upper opening 45 between the adjacent side molds 40 and 40 is slid in the lateral direction by driving the slider 24. . The molded body 5 in a state where the molding material 5A is solidified includes the upper surface (lower mold surface) 21 of the upper mold 20, the upper surface (upper mold surface) 31 of the lower mold 30, and the side surfaces of the left and right side molds 40, 40 ( The left and right mold surfaces 41 and 41 may be bonded. In such a case, if the upper mold 20 is removed upward with respect to the upper surface of the molded body 5, a tensile load is applied to the upper surface of the molded body 5, and the molded body 5 may be peeled off from the wire connection portion 4. is there. Therefore, the upper mold 20 in a state where the upper opening 45 between the left and right side molds 40 and 40 is closed is slid in the horizontal direction as it is, and the lower surface 21 of the upper mold 20 and the upper surface of the molded body 5 are The adhesive part of is sheared. Thereby, the upper mold | type 20 can be favorably peeled (release) from the upper surface of the molded object 5. FIG.

  Next, as shown in FIGS. 9A and 9B, the side mold 40 is lowered with respect to the lower mold 30 by driving the cylinder 46. At this time, the upper surface 44 of the side mold 40 is lowered to a position positioned below the upper surface 31 of the lower mold 30. As a result, the bonded portions between the left and right side surfaces of the molded body 5 and the side surfaces 41 and 41 inside the side molds 40 and 40 are sheared, and the side molds 40 and 40 are peeled off from the left and right side surfaces of the molded body 5 (release). ) And finally, the molded object 5 is removed from the upper surface 31 of the lower mold | type 30, and the electric wire 1 with a terminal by which the electric wire connection part 4 as shown in FIG.

  The inner surface (the lower surface 21, the upper surface 31 and the side surfaces 41, 41) of the upper mold 20, the lower mold 30, and the left and right side molds 40, 40 are coated with fluorine to improve releasability from the molded body 5. It is good to have been given. As a result, the adhesive force between the molded body 5 and the mold 10 (the upper mold 20, the lower mold 30, and the left and right side molds 40, 40) is reduced, so that the molded body 5 is taken out from the mold 10 by the method described above. At that time, it is possible to prevent the molded body 5 from being deformed or damaged.

  In this way, the molded body 5 that seals the wire connection portion 4 has a size that allows the cross-section (outer shape) to be inserted into the terminal insertion hole 7a of the connector housing 7 as shown in FIG. -It can be molded (molded) into a shape. Therefore, as shown in FIG. 11A, the wire connection portion 4 that is smoothly sealed with the molded body 5 together with the terminal portion 3 without interfering with the terminal insertion hole 7 a of the connector housing 7. Can be inserted. Further, as shown in FIG. 11 (b), the front side of the molded body 5 is provided so as not to interfere with the retainer 8 for detecting whether or not the terminal portion 3 is inserted up to a predetermined position of the terminal accommodating hole 7a. It is also possible to form the part thinner than the rear part. Thereby, the retainer 8 can be smoothly mounted in the retainer mounting hole 7 b of the connector housing 7 without causing interference with the molded body 5.

  Next, modifications 1 to 4 of the above-described embodiment will be described. In addition, about the same structure as embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted and it demonstrates centering on a different point.

  FIG. 12 shows a first modification, and the lower surface 21 of the upper mold 20 is provided with an inflow prevention wall 25 protruding downward from the front end portion of the lower surface 21. The inflow prevention wall 25 is arranged between the terminal portion 3 and the wire connection portion 4. By providing such an inflow prevention wall 25 in the upper mold 20, the gel-like molding material 5 </ b> A applied to the electric wire connecting portion 4 is sandwiched between the upper mold 20 and the lower mold 30 as shown in the figure and pressurized. When being done, it is prevented that it flows into the terminal part 3 which is a connection part with a counterpart terminal. This prevents problems such as poor contact with the counterpart terminal.

  FIG. 13 shows a second modification in which an inflow prevention wall 61 that hangs downward is arranged between the terminal portion 3 and the wire connection portion 4. For example, when the molding material 5A is gelled (melted) at high temperature and solidified (solidified) at room temperature, the upper mold 20 before contacting the molding material 5A is heated in advance. Although it is necessary, the structure in which the inflow prevention wall 61 is provided so as to be separate from the heated upper mold 20, that is, the structure in which the inflow prevention wall 61 is not heated, the molding material 5 </ b> A is brought to the substantially normal temperature. It can be cooled and solidified by contact with the inflow prevention wall 61. As a result, the molding material 5A is further suppressed from flowing into the terminal portion 3 which is a connection portion with the counterpart terminal.

  In this case, as shown in FIG. 13A, when the molding material 5 </ b> A is applied to the wire connection portion 4 by the dispenser 51, the inflow prevention wall 61 is disposed between the terminal portion 3 and the wire connection portion 4. Also, as shown in FIG. 13B, when the molding material 5A is sandwiched between the upper mold 20 and the lower mold 30 and pressed, the inflow prevention wall 61 is connected to the terminal portion. You may arrange | position between 3 and the electric wire connection part 4. FIG. In either case, the molding material 5A is prevented from flowing into the terminal portion 3 which is a connection portion with the counterpart terminal.

  Further, in the first and second modified examples described above, the aluminum wire in which the rear end surfaces of the upper mold 20, the lower mold 30, and the left and right side molds 40, 40 are connected to the wire connecting portion 4. It is good to arrange | position in the position which left | separated predetermined length back from the edge part of the outer skin Wb of W. When the inflow prevention walls 25 and 61 described above are provided, that is, when the flow of the molding material 5A from the electric wire connecting portion 4 to the terminal portion 3 is prevented, the upper die 20 and the lower die 30 are sandwiched and pressurized. At this time, the molding material 5A flows out to the aluminum electric wire W side opposite to the terminal portion 3 side. At this time, the molding material 5A flowing out to the aluminum electric wire W side becomes the molding die 10 (upper die 20, lower die). If it protrudes outward from the mold 30 and the left and right side molds 40, 40), the portion protruding to the outside cannot be formed into a predetermined shape, and that portion interferes with the terminal receiving hole 7 a of the connector housing 7. There is a risk of it.

  Therefore, as shown in FIGS. 12 and 13, the rear end surfaces of the upper mold 30, the lower mold 30, and the left and right side molds 40, 40 are formed on the outer skin Wb of the aluminum electric wire W connected to the electric wire connecting portion 4. The upper mold 20, the lower mold 30, and the left and right side molds 40 are further made of aluminum from the wire connection part 4 so as to be arranged behind the end part by a predetermined length, in this case, behind the outer crimping piece 4 b. It is preferable to have a shape extending a predetermined length in the direction of the electric wire W. Thus, the molding material 5A that has flowed out to the aluminum electric wire W side is prevented from protruding from the molding die 10 (the upper die 20, the lower die 30, and the left and right side dies 40, 40).

  FIG. 14 shows a third modification. In this case, a portion of the base plate 42 in front of the side mold 40 is separated from the base plate 42 so as to be separated from the base plate 42, thereby forming a cooling body 71. Yes. The cooling body 71 is formed so as to be in contact with the front end surface, the left and right side surfaces, and the lower surface of the terminal portion 3, and a flow path 71 a through which a coolant flows is provided. Further, a front stop wall 71b is erected on the front end of the cooling body 71, and the front end surface of the terminal portion 3 of the terminal-attached electric wire 1 is brought into contact with the rear surface of the front stop wall 71b, so that the electric wire with terminal is provided. One electric wire connecting portion 4 is positioned at a predetermined position between the side molds 40, 40.

  By cooling the terminal portion 3 with the cooling body 17 in contact with such a terminal portion 3, the tip portion of the molding material 5 </ b> A flowing from the wire connection portion 4 toward the terminal portion 3 is moved near the entrance of the terminal portion 3 ( It can be cooled and solidified at a position in the vicinity of the rear end), and it is possible to prevent the molding material 5A from flowing further from the position to the back side of the terminal portion 3.

  In this case, as shown in FIG. 14 (a), when the molding material 5A is applied to the wire connecting portion 4 by the dispenser 51, the terminal portion 3 may be cooled by the cooling body 71. As shown in FIG. 14B, the terminal portion 3 may be cooled by the cooling body 71 even when the molding material 5A is sandwiched between the upper mold 20 and the lower mold 30 and pressed. In either case, the molding material 5A is prevented from flowing into the terminal portion 3 which is a connection portion with the counterpart terminal.

  FIG. 15 shows a fourth modification example. In the upper mold 20, a nesting mold 81 having a bubble releasing hole 81 a is inserted so as to be movable up and down. For example, when the aluminum conductor Wa of the aluminum electric wire W has a configuration in which a plurality of strands are bundled, air is present in the gaps between the strands, so that the applied molding material 5A is between the strands. Air may escape from the molding material 5A as bubbles as it enters the gap.

  Therefore, the insert mold 81 having the air vent hole 81a opened is inserted into the upper mold 20 so as to be movable up and down, and the gel-like molding material 5A applied to the wire connection portion 4 is shown in FIG. ), The lower surface 81b of the nesting die 81 is raised from the lower surface 21 of the upper die 20 to a predetermined position when being sandwiched and pressurized by the upper die 20 and the lower die 30. Then, when the bubbles are almost removed from the molding material 5A, the lower surface 81b of the nested die 81 is lowered to the position of the lower surface 21 of the upper die 20 as shown in FIG. Alternatively, the molding material 5A can be molded into the molded body 5 having no bubbles on the surface. In this case, as an insertion point of the insert mold 81 into the upper mold 20, in addition to being disposed above the aluminum conductor Wa between the conductor crimping piece 4 a and the outer crimping piece 4 b of the electric wire connecting portion 4 as illustrated, It is preferable to dispose at a location where bubbles can easily escape from the molding material 5A, such as disposing the aluminum conductor Wa protruding forward from the conductor crimping piece 4a.

  According to the manufacturing method of the electric wire with terminal explained above, the molding material 5A applied to the electric wire connecting portion 4 of the electric wire 1 with terminal is formed into the molded body 5 having a predetermined cross section, for example, the cross section is as described above. It can be molded (molded) into a molded body 5 having a size and shape that can be inserted into the terminal insertion hole 7 a of the connector housing 7. This prevents the problem that the solidified molding material 5A (molded product 5) interferes with the terminal accommodating hole 7a of the connector housing 7 as in the case where the molding material 5A is simply applied to the wire connection portion 4. Is done.

  The used mold 10 (upper mold 20, lower mold 30 and left and right side molds 40, 40) surrounds the upper and lower sides and the right and left sides of the wire connection portion 4 and opens without surrounding the wire connection portion 4. Further, since it is a simple configuration, that is, a configuration in which the wire connecting portion 4 is not completely sealed, the manufacturing cost of the mold 10 can be made lower than the manufacturing cost of the insert molding die.

  As mentioned above, although embodiment of the manufacturing method of the electric wire with a terminal was described to the present invention, the present invention is not limited to such embodiment at all, and it implements in various modes in the range which does not deviate from the gist of the present invention. Of course you can.

  For example, in the above-described embodiment, when the molding material 5A applied to the wire connection portion 4 is sandwiched and pressed between the upper mold 20 and the lower mold 30, the upper mold 20 and the left and right side molds 40, 40 are Although the configuration in which the mold 30 is lowered to a predetermined position has been described, the lower mold 30 may be configured to be raised to a predetermined position with respect to the upper mold 20 and the left and right side molds 40 and 40. Moreover, although the structure which cools the lower mold | type 30 with the cooling body 34 was demonstrated, you may make it the structure which cools the upper mold | type 20 with the same cooling body. Furthermore, although the example which applied the manufacturing method of this invention about the connection part of the copper terminal 2 and the aluminum electric wire W was demonstrated, the connection part of a copper terminal and a copper electric wire and the connection part of an aluminum terminal and an aluminum electric wire are also mentioned. A manufacturing method can be applied, and the present invention is not limited to the above-described embodiment.

1: Electric wire with terminal 2: Copper terminal 3: Terminal part 4 Electric wire connection part 5: Molded body 5A: Molding material 7: Connector housing 7a: Terminal insertion hole 7b: Retainer mounting hole 8: Retainer W: Aluminum electric wire Wa: Aluminum conductor Wb: outer skin 10: mold 20: upper mold 21: lower surface (upper mold surface) 22: heater 23: cylinder 24: slider 25: inflow prevention wall 30: lower mold 31: upper surface (lower mold surface) 33: Heater 34: Cooling body 40: Side mold 41: Side surface (left and right mold surfaces) 42: Base plate 42b: Front stop wall 43: Lower opening 44: Upper surface 45: Upper opening 46: Cylinder 51: Dispenser 61: Inflow prevention wall 71: Cooling body 81: Nesting die 81a: Bubble removal hole 81b: Lower surface

Claims (13)

  A first step of connecting the exposed conductor by removing the outer sheath of the electric wire to the electric wire connecting portion of the terminal having the terminal portion connected to the counterpart terminal and the electric wire connecting portion at the front and rear; and Then, a molding material is applied so as to cover the wire connection portion, and the molding material is molded into a molded body having a predetermined shape in a molding die surrounding the top, bottom, left and right of the wire connection portion, and the wire connection portion is formed. And a second step of sealing with a body.   The molding die is disposed above the electric wire connection part to mold the upper surface of the molded body, the lower mold is disposed below the electric wire connection part to mold the lower surface of the molded body, and The upper mold opens and closes the upper opening between the left and right molds. The upper mold is arranged on both the left and right sides of the wire connection portion and molds the left and right sides of the molded body. The lower mold is provided so that it can be inserted from below into the lower opening between the left and right side molds. In the second step, the lower mold is surrounded by the lower mold and the left and right side molds. The molding material is applied to the wire connection portion and the upper mold closes the upper opening between the left and right side molds, and then the upper mold and the left and right side molds are predetermined with respect to the lower mold. Down to a position, or the lower mold is the upper mold and the Method of manufacturing an electric wire with terminal according to claim 1, characterized in that so as to increase to a predetermined position relative to the right of the double-sided.   The upper die is formed with an inflow prevention wall disposed between the terminal portion of the terminal and the wire connecting portion so as to protrude downward. In the second step, the inflow of the upper die is formed. The method for manufacturing a terminal-attached electric wire according to claim 2, wherein the molding material applied to the electric wire connecting portion by the prevention wall does not flow into the terminal portion.   The said inflow prevention wall is provided so that it may become a different body from the said upper mold | type, The manufacturing method of the electric wire with a terminal of Claim 3 characterized by the above-mentioned.   The rear end surfaces of the upper mold, the lower mold, and the left and right side molds are arranged at positions spaced a predetermined length rearward from the end portion of the outer sheath of the wire connected to the wire connecting portion of the terminal. The method for manufacturing an electric wire with a terminal according to claim 3 or 4, wherein the electric wire with terminal is provided.   5. The method for manufacturing a terminal-attached electric wire according to claim 1, wherein, in the second step, the terminal portion of the terminal is cooled.   In the upper mold, a nesting mold having a hole for removing air bubbles is inserted so as to be movable up and down. In the second step, the lower surface of the nesting mold is positioned at a predetermined position from the lower surface of the upper mold. The upper mold in a state where it is raised to the predetermined position with respect to the lower mold together with the left and right side molds, or the lower mold is arranged such that the lower surface of the nested mold extends from the lower surface of the upper mold to the predetermined position. The lower surface of the nested mold is lowered to the lower surface position of the upper mold after the upper mold in the raised state and the left and right side molds are raised to a predetermined position. The manufacturing method of the electric wire with a terminal as described in any one of 6.   The said 2nd process WHEREIN: The said upper mold | type before enclosing the said electric wire connection part and the said lower mold | type were each previously heated, The any one of Claim 2 to 7 characterized by the above-mentioned. Of manufacturing electric wires with terminals.   In the second step, after the upper mold and the left and right side molds are lowered to a predetermined position with respect to the lower mold, or the lower mold is in a predetermined position with respect to the upper mold and the left and right side molds. The method for manufacturing a terminal-attached electric wire according to any one of claims 2 to 8, wherein either or both of the upper mold and the lower mold are cooled after the temperature rises.   Further, after the second step, a third step is provided that enables the molded body to be removed from the mold, and in the third step, the upper die is slid in either the left or right lateral direction. The lower mold is raised with respect to the left and right side molds or the left and right side molds are lowered with respect to the lower mold after being moved. The manufacturing method of the electric wire with a terminal as described in a term.   11. The terminal according to claim 10, wherein the inner surface of each of the upper mold, the lower mold, and the left and right side molds is coated with a coating that improves releasability from the molded body. A manufacturing method of an attached electric wire.   12. The terminal according to claim 1, wherein the terminal is a copper terminal made of copper or a copper alloy, and the electric wire is an aluminum electric wire in which a conductor made of aluminum or an aluminum alloy is covered with an insulating outer skin. The manufacturing method of the electric wire with a terminal as described in any one.   The method for manufacturing an electric wire with a terminal according to any one of claims 1 to 12, wherein the molding material is an anticorrosive.

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