JP2004249562A - Method for producing mold shell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable improvement in molding accuracy associated with the fixing of a temperature regulation pipe, time shortening, work simplification, etc. <P>SOLUTION: An entrance tank model is immersed in an electrolytic bath, and a primary electrocasting plating layer is molded on the molding surface of the model. Separately, by a pipe molding mold having a pipe molding surface set up approximately in the same shape as that of the molding surface of the model, the temperature regulation pipe is molded along the pipe molding surface, and the end of a connection pipe body for supplying/recovering a heating medium is connected with the end of the molded temperature regulation pipe. The molded temperature regulation pipe removed from the pipe molding mold is set on the back of the primary electrocasting plating layer molded on the molding surface of the model, the model is immersed again in the electrolytic bath, and a secondary electrocasting plating layer which coats the temperature regulation pipe and is integrated with the primary electrocasting plating layer is molded. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a mold shell, and more particularly, to a metal mold formed into a required shape based on an electroforming technique using a tank model, and a temperature control pipe for adjusting a temperature of a molding surface is fixed. The present invention relates to a method for manufacturing a mold shell.
[0002]
[Prior art]
For example, in various vehicle interior members such as an instrument panel installed in a passenger compartment of a passenger car or the like, a synthetic resin skin material is applied to an outer surface exposed to the passenger compartment in order to improve texture and tactile sensation. Often do. This skin material is molded based on a vacuum molding technique using a vacuum molding die, molded using a powder slush molding technique using a powder slush molding mold, and urethane spray molded using a spray molding mold. What is formed based on technology etc. are suitably implemented.
[0003]
Among these, the powder slush molding die used in the powder slush molding technology is a nickel mold shell molded into a required shape based on a known electroforming technology using a tank model, and its skin molding surface. It is a structure attached as. In the mold shell, a temperature control pipe provided for temperature control of the skin molding surface is provided on the back side (the back side of the skin molding surface), and a heat medium such as oil to be circulated through the temperature control pipe. The temperature control of the skin molding surface is performed based on the temperature control. That is, a heated high-temperature heat medium is allowed to flow through the temperature control pipe, and while the skin molding surface of the mold shell is heated to, for example, about 250 ° C., the powder slush molding mold is rotated to rotate the resin slush inside. Is brought into contact with the skin molding surface, and the resin powder is adhered while being gradually melted. Then, when the melted resin adheres to a required thickness, a cooled low-temperature heat medium is circulated through the temperature control pipe, and the skin molding surface of the mold shell is cooled to about 70 ° C. to melt the resin in a molten state. By curing, a skin material of a required thickness to which the shape and pattern of the skin molding surface are transferred is formed. When the temperature control pipe is made of steel, the temperature control pipe is often welded to the back surface of the mold shell with a silver brazing. A technique related to this is disclosed in Patent Document 1.
[0004]
[Patent Document 1]
JP-A-7-227851
[0005]
[Problems to be solved by the invention]
By the way, since the melting temperature of the silver braze is 600 to 700 ° C., when fixing the temperature control pipe to the back surface of the mold shell, the silver braze and the mold shell are heated to a higher temperature and welded. Work will be done. For this reason, the mold shell having a small thickness and a low rigidity has a problem that deformation such as distortion, torsion, and contraction occurs due to shrinkage of the silver solder when cooled to room temperature after completion of the welding operation. . When the mold shell is deformed in this way, the skin material molded using the mold shell is naturally formed into a deformed shape, and the molding accuracy of the skin material is reduced, and There has been an inconvenience affecting the texture of the vehicle interior member.
[0006]
In order to solve the above-mentioned problem, Patent Literature 1 discloses that after forming an electroformed shell (die shell) for a mold with a matrix (a tank model), a temperature is applied to the back of the electroformed shell for the mold. A control pipe (temperature control pipe) is disposed while being formed (bent forming), and a thin body having a large number of through holes and having conductivity on the surface is formed on the electroformed shell for the mold and the temperature control pipe. A fixing structure for fixing the temperature control tube by forming an electroformed coating portion on the electroformed shell for the mold and the temperature control tube after coating is disclosed. However, in such a structure for fixing a temperature control tube, the process of forming the electroformed shell for the mold, the process of forming / arranging the temperature control tube, and the process of fixing and fixing the thin body are performed simultaneously. Since it cannot proceed, there is an inherent disadvantage that the production time of the electroformed shell for a mold is prolonged. In addition, since a space is formed between the electroformed shell for the mold, the temperature control tube, and the electroformed coating portion, it is possible to point out a problem that improvement in heat conduction efficiency is not considered.
[0007]
[Object of the invention]
The present invention has been proposed in order to preferably solve the above-mentioned problems, and provides a method for manufacturing a mold shell that can improve molding accuracy, shorten time, simplify work, and the like accompanying fixing of a temperature control pipe. The purpose is to do.
[0008]
[Means for Solving the Problems]
In order to solve the above problems and achieve the intended purpose, the present invention is formed into a required shape based on an electroforming technique using a tank model, and a temperature control pipe for adjusting a temperature of a forming surface is fixed. In a method of manufacturing a mold shell,
While immersing the tank model in an electrolytic tank to form a primary electroformed plating layer of a required thickness on a forming surface of the tank model,
By a pipe forming die having a pipe forming surface set to substantially the same shape as the forming surface of the tank model, the temperature-controlled pipe is formed along the pipe forming surface,
Connected to the end of the temperature-controlled pipe after molding, the end of a connecting pipe body that supplies and recovers the heat medium,
On the back of the primary electroformed plating layer formed on the forming surface of the tank model, set the temperature-regulated pipe after molding removed from the pipe mold,
The tank model in which the temperature control pipe is set is immersed again in an electrolytic cell to form a secondary electroformed plating layer having a required thickness to be integrated with the primary electroformed plating layer while covering the temperature control pipe. It is characterized by doing so.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a preferred embodiment of a method for manufacturing a mold shell according to the present invention will be described below with reference to the accompanying drawings.
[0010]
(Mold shell)
First, a mold shell manufactured based on the method for manufacturing a mold shell according to the present embodiment will be schematically described with reference to FIGS. The mold shell 10 of the present embodiment is formed into a required shape based on an electroforming technique using a tank model 40 schematically illustrated in FIG. 5, and a skin forming surface (molding) for forming a skin material and the like. Surface 12 is formed on the surface side, and a plurality of temperature control pipes 14 used for temperature control of the skin forming surface 12 are fixed inside at appropriate intervals. Specifically, the mold shell 10 includes a primary electroformed plating layer 16 having a required thickness formed on the molding surface 42 of the tank model 40 and the primary electroformed plating layer 16 covering the outer surface of the temperature control pipe 14. It comprises a plating layer 16 and a secondary electroformed plating layer 18 of a required thickness integrated with the plating layer 16. Connecting pipes 20 for supplying or recovering the heat medium to and from the temperature control pipes 14 are connected to both ends of each of the temperature control pipes 14.
[0011]
As described later and shown in FIG. 6 and the like, the primary electroformed plating layer 16 forms a molding surface 42 of the tank model 40 in a “primary electroformed plating layer forming step” using the tank model 40. It is made of a nickel alloy molded with. The thickness t1 is set to about 2 to 3 mm, and the surface thereof is the skin molding surface 12 on which the surface pattern formed on the molding surface 42 of the tank model 40 is faithfully transferred and reproduced. The thickness t1 can be set to be thicker or thinner by adjusting the length of time required for electroforming in the primary electroformed plating layer forming step.
[0012]
Each of the temperature control pipes 14 is made of steel having an outer diameter D of about 10 to 15 mm and a thickness of about 1 mm, and is mutually connected so that uniform temperature adjustment of the skin forming surface 12 can be achieved. Adjacent temperature control pipes 14 are provided at appropriate intervals. The temperature control pipe 14 is appropriately bent and / or bent in a “temperature control pipe preparation step” using a separately prepared pipe mold 50, as described later and shown in FIG. It is formed into a shape along the pipe forming surface 54 of the first forming die 52 of the pipe forming die 50. The pipe forming surface 54 of the first forming die 52 is formed in the same shape as the back surface of the primary electroformed plating layer 16 formed on the forming surface 42 of the tank model 40 (FIG. 6A). , (B)), the temperature control pipe 14 preformed into a shape along the pipe forming surface 54 has a shape that exactly matches the back surface of the primary electroformed plating layer 16.
[0013]
As described later and as shown in FIG. 14 and the like, the secondary electroformed plating layer 18 forms the primary electroformed plating layer 16 in the “secondary electroformed plating layer forming step” using the tank model 40. It is made of a nickel alloy molded with the respective temperature control pipes 14 set on the back surface. Although the thickness t2 is about 2 to 3 mm, since the secondary electroformed plating layer 18 and the primary electroformed plating layer 16 are integrated with each other, the boundary between them is actually clear. Not. The thickness t2 can be set to be thicker or thinner by adjusting the length of time required for the electroforming process in the secondary electroformed plating layer forming step.
[0014]
The connection pipe body 20 has a steel manifold (concentrated pipe) 22 connected to a heating medium supply device (not shown), and one end connected to the manifold 22 and the other end corresponding to each of the temperature control pipes 14. And a plurality of steel distribution pipes 24 connected to each other, and has a moderate rigidity as a single structure. The connecting pipe body 20 on one side (for example, the left side in FIG. 15B) distributes a heat medium supplied from a heat medium supply device (not shown) from the manifold 22 to each distribution pipe 24 to control each temperature. It functions to supply to the pipe 14. The other (right side in FIG. 15B) connecting pipe body 20 transfers the heat medium supplied to each of the temperature control pipes 14 from each distribution pipe 24 to the heat medium supply device via the manifold 22. Function to collect. The end 14a of each temperature control pipe 14 and the end 24a of the distribution pipe 24 of the connection pipe body 20 are connected to each other via an appropriate joint member 26.
[0015]
As shown in FIG. 3 and FIG. 4, the mold shell 10 of this embodiment includes the first electroformed plating layer 16 and the second electroformed plating layer 18 integrated with each other. The structure is such that the temperature control pipe 14 is completely covered and housed, and the electroformed plating layers 16 and 18 are completely adhered to the outer surface of the temperature control pipe 14. Thereby, since the heat of each of the temperature control pipes 14 is efficiently conducted to the primary electroformed plating layer 16 and the secondary electroformed plating layer 18, the heat conduction efficiency is improved, and the surface molding surface is improved. The temperature control over the entire surface 12 can be achieved uniformly and efficiently. In addition, since the primary electroformed plating layer 16 and the secondary electroformed plating layer 18 and the respective temperature control pipes 14 form a single integrated structure, the respective temperature control pipes 14 are so-called. It functions as a reinforcing material, and even if the thicknesses t1 and t2 of the primary electroformed plating layer 16 and the secondary electroformed plating layer 18 are small, deformation such as distortion, torsion, and bending due to temperature change, external force, and the like is unlikely to occur. It has a structure.
[0016]
The mold shell 10 of the embodiment configured as described above is connected to a mold body 34 of a powder slush molding mold 32 which is a skin molding mold for molding the skin material 30 as illustrated in, for example, FIG. The pipes 20, 20 are mounted in a connected state and used as a skin molding surface of the mold 32. A specific forming method using the powder slush forming mold 32 will be briefly described. First, a high-temperature heat medium is circulated to each temperature control pipe 14 through the connecting pipe body 20 to make the skin forming surface 12 necessary. With the temperature raised to the temperature, the mold body 34 is rotated about the rotating shaft 36, and the resin powder P previously charged into the mold is brought into contact with the skin molding surface 12. As a result, the resin powder P is in a molten state and gradually adheres to the skin molding surface 12, and its thickness gradually increases with time. Then, when a predetermined time has elapsed and a resin having a desired thickness has adhered to the skin molding surface 12, a low-temperature heat medium is circulated to each temperature control pipe 14 through the connection pipe body 20. By cooling the skin molding surface 12 to a required temperature, the resin adhering to the skin molding surface 12 is cured, and the skin material 30 having a required thickness is formed.
[0017]
(Method of manufacturing mold shell)
Next, a method for manufacturing the mold shell 10 configured as described above will be described in detail. The method of manufacturing the mold shell according to the present embodiment includes a method of forming the primary electroformed plating layer 16 using the tank model 40, as schematically shown in FIG. Step), a “temperature control pipe preparation step” for forming the temperature control pipe 14 using the pipe mold 50, and the secondary electroformed plating layer 18 using the tank model 40 again. The “secondary electroformed plating layer forming step” is roughly divided into three steps. The “primary electroformed plating layer forming step” and the “temperature control pipe preparing step” are performed using the separately prepared tank entry model 40 and pipe forming die 50, so that they are performed in parallel. It is possible to proceed at the same time.
[0018]
FIGS. 5A and 5B are longitudinal sectional side views schematically illustrating a tank model 40 to be formed in order to form the primary electroformed plating layer 16 in a primary electroformed plating layer forming step. 6 (a) and 6 (b) schematically show a state in which the primary electroformed plating layer 16 is formed on the forming surface 42 using the tank model 40. It is the longitudinal side view illustrated and the longitudinal front view which omitted a part. The tank model 40 is made of a thermosetting resin (epoxy resin, phenol resin, polyester resin, etc.) molded from a skin model (not shown) based on a known silicon inversion technique, The molding surface 42 formed into the outer shape of the skin material 30 is subjected to a conductive process (a process of applying a conductive film by a silver mirror reaction process or the like).
[0019]
As shown in FIGS. 6 (a) and 6 (b), the primary electroforming plating layer forming process using the tank model 40 is performed by using the tank model 40 as a so-called cathode electrode in an electroforming apparatus. This is a work process of performing the primary electroforming for a required set time while being immersed in the tank 44. When the primary electroforming is performed for a required time, nickel is gradually deposited on the forming surface 42 of the tank model 40, and the primary electroformed plating layer 16 having a required thickness is formed on the forming surface 42. . When the formation of the primary electroformed plating layer 16 having a thickness t1 of 2-3 mm is completed, the tank model 40 is once taken out of the electrolytic tank 44 to complete the primary electroformed plating layer forming step. I do.
[0020]
FIG. 7 is a schematic vertical sectional side view and a partially omitted vertical sectional front view of a pipe forming die used for forming the temperature control pipe 14 into a required shape in a temperature control pipe preparation step. The pipe forming die 50 has a shape substantially the same as the shape of the forming surface 42 of the previous tank model 40, more precisely, the shape of the back surface of the primary electroformed plating layer 16 formed by the forming surface 42. A first molding die 52 having a surface 54, and a pair of the first molding die 52, and the pipe molding surface 54 is a pipe pressing surface formed in an approximate shape with an interval corresponding to the diameter dimension of the temperature control pipe 14. And a second molding die 56 having a 58, and has a rigid metal press die form. Further, on the left and right sides of the first molding die 52, support bases 60, 60 which receive both ends of the straight temperature control pipes 14 before molding and support the temperature control pipes 14 substantially horizontally are provided. It is arranged detachably. Further, an adhesive member 62 such as a double-sided tape extending in a direction orthogonal to the extending direction of the temperature control pipe 14 is provided on the pipe forming surface 54 of the first mold 52. Plural pieces are mounted at appropriate intervals in the existing direction.
[0021]
In the temperature control pipe preparation step using such a pipe forming die 50, first, as shown in FIGS. 7A and 7B, the second forming die 56 is opened from the first forming die 52, 8A and 8B, the second molding die 56 is moved closer to the first molding die 52 as shown in FIGS. 8A and 8B. Thereby, each temperature control pipe 14 is sandwiched between the pipe forming surface 54 of the first forming die 52 and the pipe pressing surface 58 of the second forming die 56, and is appropriately bent and / or deformed into a shape along the pipe forming surface 54. Or it is curved and deformed. Then, the proximity movement of the second molding die 56 is completed, and each temperature control pipe 14 molded into a predetermined shape is pressed against the adhesive member 62. Depending on the shapes of the pipe forming surface 54 and the pipe pressing surface 58, it may not be possible to appropriately perform the bending and bending of the temperature control pipe 14, but in such a case, the forming is hindered. The temperature control pipes 14 may be individually preliminarily formed in advance.
[0022]
When the molding of each temperature control pipe 14 is completed, the second molding die 56 is moved away from the first molding die 52 to open the pipe molding die 50. At this time, each of the molded temperature control pipes 14 is pressed against the adhesive member 62 and adhered (sticked) to the member 62, and is in close contact with the pipe molding surface 54 of the first molding die 52 ( (A state along the line) (FIGS. 9A and 9B).
[0023]
When the temperature control pipe 14 is completely formed by the pipe forming die 50, the pipe forming surface 54 of the first forming die 52 is removed with the support bases 60 removed as shown in FIGS. 9 (a) and 9 (b). To the left and right ends 14a of the temperature control pipes 14 temporarily fixed to the end portions 24a of the distribution pipes 24 in the connection pipe bodies 20, 20 via appropriate joint members 26. Connecting. Since these connecting pipe bodies 20, 20 have rigidity themselves and are gripped by an appropriate gripping device 64, each temperature control pipe 14 connected to the end of each distribution pipe 24 has both ends. The posture is maintained by the connecting pipe bodies 20, 20 (FIGS. 10A and 10B).
[0024]
When the connection pipes 20, 20 are connected to each of the temperature control pipes 14, the gripping device 64 holding the connection pipes 20, 20, as shown in FIGS. 11 (a) and 11 (b), is completed. The first pipe 52 is moved upward to integrally remove the connecting pipe bodies 20 and the respective temperature control pipes 14 connected thereto from the pipe forming surface 54 of the first forming die 52. At this time, since each of the temperature control pipes 14 is supported by the connecting pipe bodies 20, 20, the temperature control pipes 14 are held in a posture state during molding.
[0025]
In the primary electroformed plating layer forming step, the forming of the primary electroformed plated layer 16 on the forming surface 42 of the tank model 40 is completed, and in the temperature control pipe preparing step, the pipe forming die 50 is used. When the preforming of the temperature control pipe 14 and the fixing of the connecting pipe bodies 20, 20 to the temperature control pipe 14 are completed, a secondary electroforming plating layer forming step is performed as illustrated in FIGS. In this secondary electroformed plating layer forming step, first, as shown in FIGS. 12A and 12B, the back of the primary electroformed plated layer 16 formed on the forming surface 42 of the tank model 40 is formed. Then, the temperature-adjusted pipe 14 which has been removed from the pipe mold 50 while being connected to the connecting pipe bodies 20, 20 is set. At this time, since each temperature control pipe 14 is already preformed and held in an appropriate posture by both connecting pipe bodies 20, 20, the setting work for the primary electroformed plating layer 16 can be performed in a short time. It can be done easily. Further, since the forming operation of the pipe 14 is not performed when setting the temperature control pipe 14, the primary electroformed plating layer 16 is not damaged (FIGS. 13A and 13B).
[0026]
Then, when the setting of the temperature control pipe 14 and the connecting pipe bodies 20, 20 on the back surface of the primary electroformed plating layer 16 is completed, the tank model 40 in which these are set is used again as a cathode electrode in the electroforming apparatus. The secondary electroforming is performed for a required set time while being immersed in the electrolytic cell 44 in the above. When such secondary electroforming is performed for a required time, nickel is gradually deposited on the outer surface of each of the temperature control pipes 14 and the back surface of the primary electroformed plating layer 16, and the temperature control pipes 14 and 1 are formed. The secondary electroformed plating layer 18 is formed so as to entirely cover the secondary electroformed plating layer 16 (FIGS. 14A and 14B).
[0027]
When the formation of the secondary electroformed plating layer 18 having a thickness t2 of 2 to 3 mm is completed, the tank model 40 is taken out of the electrolytic tank 44 to complete the secondary electroformed plating layer forming step. Then, after taking out the tank model 40, the manufactured mold shell 10 is released from the molding surface 42 of the tank model 40, thereby completing the manufacturing operation of the mold shell 10 (FIG. 15 (a)). ), (B)).
[0028]
In the method of manufacturing the mold shell according to the embodiment, the primary electroformed plating layer 16 and the secondary electroformed plating layer 18 are never exposed to a high temperature when the temperature control pipe 14 is connected and fixed. Therefore, after the temperature control pipe 14 is fixed, the mold shell 10 hardly undergoes deformation such as distortion, twisting and bending. Therefore, the skin material 30 molded by the powder slush molding die 32 to which the mold shell 10 is mounted does not suffer from inconvenience such as a decrease in molding accuracy.
[0029]
Further, in the method for manufacturing a mold shell according to the present embodiment, a “primary electroformed plating layer forming step” for forming the primary electroformed plating layer 16, forming the temperature control pipe 14, and forming the temperature control pipe 14. The “temperature control pipe preparation step” for connecting the connection pipe body 20 to the pipe 14 can be performed simultaneously in parallel as a separate step. Therefore, following the completion of the “primary electroformed plating layer forming step”, the temperature control pipe 14 can be set on the back surface of the formed primary electroformed plated layer 16, and further continuously “secondary electroformed plated layer” Since the "forming step" can be performed, the time required for manufacturing the mold shell 10 can be significantly reduced as compared with the conventional manufacturing method.
[0030]
Further, the work of removing the temperature control pipe 14 from the pipe forming die 50 and the work of setting the temperature control pipe 14 on the back surface of the primary electroformed plating layer 16 formed on the forming surface 42 of the tank model 40. At this time, since the posture of the temperature control pipe 14 is maintained by the connecting pipe bodies 20, 20 connected to the temperature control pipe 14, the removing operation and the setting operation can be performed easily and accurately in a short time.
[0031]
On the other hand, as described above, the mold shell 10 manufactured according to the manufacturing method of the embodiment has its temperature controlled by the mutually integrated primary electroformed plating layer 16 and secondary electroformed plating layer 18. Since the pipe 14 is completely covered, the fixed holding strength of the temperature control pipe 14 is greatly improved as compared with the conventional one, and the temperature control pipe 14 functions as a reinforcing material to greatly improve rigidity. are doing. Further, since the outer surface of each temperature control pipe 14 is completely adhered to the primary electroformed plating layer 16 and the secondary electroformed plating layer 18, the heat conduction efficiency is greatly improved, and the surface molding surface is improved. Twelve temperature controls can be performed uniformly and efficiently.
[0032]
In the above-described embodiment, the case where the connecting operation of the connection pipe bodies 20 and 20 to the temperature control pipe 14 is performed after the opening of the pipe forming die 50 is performed. However, the connecting operation is performed before the opening of the die. You may. That is, when the temperature control pipe 14 is completely formed by the first mold 52 and the second mold 56, the temperature control pipes 14 can be fixed by holding both the molds 52 and 56 in a closed state. Therefore, an effect that can easily perform the connection work of the connecting pipe bodies 20, 20 can be expected. Further, the adhesive member 62 for temporarily fixing the temperature-controlled pipe 14 after molding to the pipe molding surface 54 of the first molding die 52 may be unnecessary.
[0033]
Further, in the above-described embodiment, the case where the temperature control pipe 14 is connected to the connecting pipe bodies 20 and 20 after the temperature control pipe 14 is formed has been described. The pipe 14 may be connected to the connecting pipe bodies 20, 20, and then the operation of forming the temperature control pipe 14 may be performed. In this case, since the respective temperature control pipes 14 are formed in a state where the postures of the temperature control pipes 14 are held by the connecting pipe bodies 20, 20, the posture of the temperature control pipes 14 is displaced during the connection work between the two pipes 20. There is an advantage that can be prevented. However, it may not be possible depending on the molding conditions, such as when the deformation amount of the temperature control pipe 14 is large before and after molding.
[0034]
【The invention's effect】
As described above, according to the method for manufacturing the mold shell according to the present invention, since the temperature control pipe is not exposed to a high temperature at the time of piping and fixing, the mold shell is distorted or twisted after the temperature control pipe is fixed. This has a beneficial effect that deformation such as bending does not occur. Then, at the time of removing the temperature control pipe from the pipe forming die and at the time of setting the temperature control pipe on the back surface of the primary electroformed plating layer formed on the forming surface of the tank model, Since the posture of the temperature control pipe is held by the connected connecting pipe body, there is an advantage that the removing operation and the setting operation can be performed easily and accurately in a short time. Further, the operation step of forming the primary electroformed plating layer and the operation step of forming the temperature control pipe and connecting the connecting pipe body to the temperature control pipe may be simultaneously performed in parallel as separate steps. Since it is possible, there is an advantage that the time required for manufacturing the mold shell can be significantly reduced as compared with the conventional manufacturing method.
[Brief description of the drawings]
FIG. 1 is a block diagram schematically illustrating a method of manufacturing a mold shell according to a preferred embodiment of the present invention for each step.
FIG. 2 is a schematic cross-sectional view of a mold shell manufactured based on the manufacturing method of the embodiment.
3A is an enlarged view of a portion A in FIG. 2, and FIG. 3B is a sectional view taken along line III-III in FIG.
FIG. 4 is a cross-sectional view showing a powder slush mold equipped with a mold shell manufactured according to the manufacturing method of the embodiment in a state where a skin material is being formed.
FIG. 5 is a cross-sectional view schematically illustrating a tank entry model, in which (a) is illustrated as a longitudinal side view, and (b) is illustrated as a longitudinal front view with a part omitted.
FIG. 6 is a cross-sectional view illustrating a state in which a tank model is immersed in an electrolytic cell of an electroforming apparatus, and a primary electroformed plating layer is formed on a forming surface thereof. (B) is illustrated as a longitudinal sectional front view partially omitted.
FIG. 7 is a cross-sectional view illustrating a pipe forming die to be used for forming a temperature-controlled pipe in a state before forming the temperature-controlled pipe, wherein (a) is a vertical sectional side view, ) Is illustrated as a partially omitted longitudinal front view.
FIG. 8 is a cross-sectional view illustrating a pipe forming die to be used for forming a temperature-controlled pipe in a state where the temperature-controlled pipe is formed, wherein (a) is illustrated as a longitudinal side view, and (b). Is illustrated as a partially omitted longitudinal front view.
9A and 9B are cross-sectional views illustrating a state where connecting pipe bodies are connected to left and right ends of a temperature-controlled pipe temporarily fixed to a pipe forming surface of a pipe forming die, wherein FIG. (B) is illustrated as a longitudinal sectional front view partially omitted.
FIG. 10 is a cross-sectional view illustrating a state in which connecting pipe bodies are connected to left and right ends of a temperature-regulated pipe temporarily fixed to a pipe forming surface of a pipe forming die, where (a) is a longitudinal side surface; (B) is illustrated as a longitudinal sectional front view partially omitted.
11A and 11B are cross-sectional views illustrating a state in which a temperature control pipe connected to a connecting pipe body is removed from a pipe forming surface of a pipe forming die, where FIG. 11A is illustrated as a longitudinal side view, and FIG. This is illustrated as a partially omitted longitudinal front view.
FIG. 12 is a cross-sectional view showing a state in which a preformed temperature control pipe is set on a back surface of a primary electroformed plating layer formed on a forming surface of a tank entry model; (B) is illustrated as a longitudinal sectional front view partially omitted.
FIG. 13 is a cross-sectional view showing a state in which a preformed temperature control pipe has been set on the back surface of a primary electroformed plating layer formed on a forming surface of a tank model, and FIG. It is illustrated as a side view, and (b) is illustrated as a longitudinal front view partially omitted.
FIG. 14 is a diagram illustrating a second embodiment of the present invention in which the tank model provided with the temperature control pipe is immersed again in the electrolytic bath of the electroforming apparatus to form a secondary electroforming plating layer covering the temperature control pipe and the primary electroforming plating layer. FIG. 2A is a cross-sectional view illustrating a state in which FIG. 1A is illustrated, in which FIG. 1A is illustrated as a vertical side view, and FIG.
FIG. 15 is a cross-section exemplifying a state in which the molding of the secondary electroformed plating layer is completed, the tank model is taken out of the electrolytic cell, and the manufactured mold shell is removed from the molding surface of the tank model. In the drawings, (a) is illustrated as a vertical side view, and (b) is illustrated as a vertical front view partially omitted.
[Explanation of symbols]
10 Mold shell
14 Temperature control pipe
16 Primary electroformed plating layer
18 Secondary electroformed plating layer
20 Connecting pipe body
40 tank entry model
42 Molding surface
50 Pipe Mold
54 Pipe molding surface

Claims (3)

A method for manufacturing a mold shell (10) formed into a required shape based on an electroforming technique using a tank model (40) and to which a temperature control pipe (14) for adjusting a temperature of a forming surface is fixed.
The immersion tank model (40) is immersed in an electrolytic cell to form a primary electroformed plating layer (16) having a required thickness on the molding surface (42) of the immersion tank model (40).
The temperature control is performed along a pipe forming surface (54) by a pipe forming die (50) having a pipe forming surface (54) set to have substantially the same shape as the forming surface (42) of the tank model (40). Forming a pipe (14),
An end of a connecting pipe body (20, 20) for supplying and recovering a heat medium is connected to an end of the temperature-controlled pipe (14) after molding,
On the back of the primary electroformed plating layer (16) formed on the forming surface (42) of the tank model (40), the temperature-controlled pipe (14) removed from the pipe forming die (50) is formed. ) And set
The tank model (40) on which the temperature control pipe (14) is set is immersed again in an electrolytic cell, and is integrated with the primary electroformed plating layer (16) while covering the temperature control pipe (14). A method for manufacturing a mold shell, wherein a secondary electroformed plating layer (18) having a required thickness is formed. When removing the temperature control pipe (14) from the pipe mold (50) and setting the temperature control pipe (14) in the tank model (40), the temperature control pipe (14) connected to the temperature control pipe (14) was used. 2. The method for manufacturing a mold shell according to claim 1, wherein the posture of the temperature control pipe (14) is maintained by the connecting pipe body (20, 20). The forming of the primary electroformed plating layer (16) performed using the tank model (40) and the temperature control pipe (14) performed using the pipe forming die (50). 3. The method for manufacturing a mold shell according to claim 1, wherein the forming and the connection of said connecting pipe body to said temperature control pipe are performed in parallel and simultaneously.

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