JP2008221565A - Molding / assembling method and molding / assembling mold for obtaining composite molded product in mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for molding and assembling a lens-equipped frame for a small camera in a mold.
A fixed frame (3) and a moving mold (4) are used to form a cylindrical frame (33), first and second lenses (35, 37), and a lid (38). ) Are formed almost simultaneously by primary injection molding. Next, the cylindrical frame is moved toward the moving mold, the mold is opened leaving the first and second lenses and the lid toward the fixed mold, the moving mold is slid, and the cylindrical frame and the first The cylindrical frame is made to face each other, the space between the molds is narrowed, and the cylindrical frame is extruded by the piston head (10a). As a result, the first lens is inserted into the cylindrical frame. Similarly, the second lens is inserted into the cylindrical frame. Finally, the cylindrical frame and the lid are aligned, and the cylindrical frame and the lid are joined by secondary injection molding.
[Selection] Figure 3

Description

  The present invention relates to a molding and assembling method and a molding and assembling mold for obtaining a composite molded product in which an insertion part is inserted into a cylindrical hollow main body, and is not particularly limited. A molding and assembling method for obtaining a composite molded article in a mold suitable for a manufacturing method for obtaining a component of an optical apparatus in which a plurality of lenses are inserted inside a cylindrical frame, and implementation of this method The present invention relates to a molding / assembly mold to be used.

  Resin cylindrical hollow body and resin insert parts are injection-molded separately using a mold, and then removed from the mold and manually inserted into the cylindrical hollow body It is widely practiced to insert and assemble to obtain a composite molded product comprising a hollow body and an insertion part. For example, as shown in FIG. 6, a cylindrical frame with a lens for a small camera attached to an electronic device such as a mobile phone is provided with a resin-made cylindrical frame 50 and the inside of the cylindrical frame. The plurality of resin lenses 51, 51 and a lid 53 that closes one of the cylindrical frames 50. Through holes 54 and 54 are formed in the bottom of the cylindrical frame 50 and the lid 53, respectively. Therefore, the light emitted from the subject passes through these through holes 54 and 54 and the lenses 51 and 51, is appropriately processed optically, and is received by an image sensor such as a CCD or CMOS.

  Such a composite molded article or a cylindrical frame 50 with a lens is generally manufactured as follows. That is, the cylindrical frame 50 and the plurality of lenses 51 and 51 are respectively molded by injection molding, and are taken out from the mold after cooling and solidification. A plurality of lenses 51, 51 are sequentially inserted into the taken-out cylindrical frame 50 manually or by a dedicated assembly device. The lid 53 is placed over the opening of the inserted cylindrical frame 50 and joined with an adhesive or the like.

JP-A-62-87315

  Patent Document 1 describes a molding method for molding a hollow molded product using a fixed mold and a movable mold that is movable while opening and closing the mold on the fixed mold. . Since a cavity for forming a pair of half-hollow molded products divided into two is formed in the fixed mold and the movable mold, the movable mold is clamped to the fixed mold. When primary injection molding is performed, a pair of semi-hollow molded products are formed. Next, the mold is opened with one semi-hollow molded product remaining in the stationary mold and the other semi-hollow molded product remaining in the moving mold, and the moving mold is slid to join the pair of semi-hollow molded products. Are positioned so as to face each other, and then clamped again to perform secondary injection molding around the butt portion of the pair of semi-hollow molded products. Then, a hollow molded product in which a pair of semi-hollow molded products are joined is obtained.

  When the injection molding method described in Patent Document 1 is applied, that is, when one semi-hollow molded product of a pair of semi-hollow molded products is regarded as a cylindrical hollow body and the other semi-hollow molded product is regarded as a lid, A molded product composed of a hollow body and a lid, for example, a molded product composed of the above-described cylindrical frame 50 with a lens for a small camera and a lid 53 can be efficiently molded in a mold. However, a plurality of lenses 51, 51 cannot be assembled. However, before the secondary injection molding with the moving-side mold opened, a plurality of lenses 51, 51 molded with another mold inside the cylindrical frame 50 can be manually or with a dedicated handling device. Pick up and insert sequentially from the opening of the cylindrical frame 50. Next, the moving side mold is slid to position and clamp so that the opening of the cylindrical frame 50 and the lid 53 are opposed to each other, and the joint between the cylindrical frame 50 and the lid 53 is formed by secondary injection molding. Once joined, a cylindrical frame 50 with a lens can be manufactured.

  However, such a molding / assembly method has a problem. For example, if the lenses 51 and 51 are manually inserted into the cylindrical frame 50, the lenses 51 and 51 may be contaminated with dirt or dirt, resulting in a defective product. Furthermore, since humans are involved, mistakes are likely to occur, and the production costs are high due to manual labor. On the other hand, when a dedicated handling device is used, an expensive device is required separately, which increases the price of the entire device and complicates the structure. Further, in order to insert the lenses 51, 51 into the cylindrical frame 50, an accurate movement of the handling device is required, and adjustment thereof requires labor. Furthermore, since the handling device must be provided in the vicinity of the injection molding machine, there is a possibility that it may interfere with the maintenance of the injection molding machine.

  Therefore, the present invention can obtain a composite molded article in which an insert part is inserted into a cylindrical hollow body efficiently at a low cost without problems such as dirt, and molding to obtain a composite molded article in a mold. An object of the present invention is to provide an assembling method and a forming / assembling mold that is directly used for carrying out the forming / assembling method.

  In order to achieve the above object, the present invention performs a primary injection molding of a resin hollow main body and an insertion part substantially simultaneously using a stationary mold and a moving mold, and inserts the hollow main body and the insertion part. With the parts remaining in separate molds, open the moving mold and move the moving mold slidably so that the opening of the hollow body and the inserted part face each other. The mold is driven in the closing direction, and the insertion part is inserted into the hollow body by the mold closing operation. Further, at the time of the primary injection molding, the lid for sealing the opening of the resin hollow main body is simultaneously injection molded, and the hollow main body and the lid are joined and integrated by secondary injection molding. .

That is, in order to achieve the above object, the invention according to claim 1 uses a fixed mold and a movable mold that is opened and closed with respect to the fixed mold and is movable. A resin hollow body having at least one opening and a resin insertion part inserted into the hollow body are injection-molded almost simultaneously, and the insertion part is inserted into the hollow body from the opening. A molding and assembling method for obtaining a composite molded product comprising the hollow main body and an insertion part in a mold, wherein the moving side mold is clamped to the fixed side mold, and the hollow main body and the A primary molding process for injection molding of the insert part almost simultaneously, and the hollow body formed by the primary molding process and the insert part are solidified, and the hollow body is either the fixed mold or the movable mold. Leave the mold in one of the molds and insert it Sina and mold opening process mold is opened while leaving the other mold,
An alignment step of moving the moving side mold opened by the mold opening step with respect to the fixed side mold so as to align the opening of the hollow body and the insertion part; and A final insertion step of inserting the insertion part into the hollow body by driving the movement side mold aligned in the alignment step in a mold closing direction; and after the final insertion step, the movement side mold Is opened to obtain a composite molded article composed of the hollow main body and an insertion part inserted into the hollow main body.

  According to a second aspect of the present invention, there is provided a resin-made hollow having at least one opening using a fixed mold and a movable mold that is movable relative to the fixed mold and movable. A main body and a plurality of resin-made insertion parts inserted into the hollow body are injection-molded substantially simultaneously, and the insertion parts are sequentially inserted into the hollow body from the opening to form the hollow body and the plurality of insertion parts. A molding and assembling method for obtaining a composite molded product comprising a plurality of inserted parts in a mold, wherein the movable side mold is clamped to the fixed side mold, and the hollow body and the plurality A first molding step for injection molding the insertion part, and the hollow body formed by the primary molding process and a plurality of insertion parts are solidified, and the hollow body is either the fixed side mold or the moving side The plurality of inserted parts are left in one of the molds. A first mold opening step of opening the mold in a state left in the other mold, and moving the moving side mold opened by the first mold opening step with respect to the fixed side mold, A first alignment step of aligning the opening of the hollow body and the first insertion component of the plurality of insertion components to face each other, and the movement aligned by the first alignment step A first insertion step of driving the side mold in the mold closing direction to insert the first insertion component into the hollow body; and the first insertion component by the first insertion step. A second mold opening step of opening the hollow main body in which the hollow body is inserted in the mold, and moving the moving side mold opened by the second mold opening step to move the hollow The opening of the main body and the second insertion part face each other A second positioning step for positioning; and the movable mold positioned in the second positioning step is driven in a mold closing direction to place the second insertion component in the hollow body. A second insertion step of inserting, a third mold opening step of opening the mold while leaving the hollow body in the mold in a state where the first and second insertion parts are inserted, and Similarly, the respective steps are repeated to sequentially insert a plurality of insertion parts into the hollow body, and after the final insertion process, the moving mold is opened to form the hollow body and the hollow body. In order to obtain a composite molded product composed of a plurality of inserted parts inserted into the main body.

  According to a third aspect of the present invention, in the method according to the first or second aspect, in the insertion step, the hollow body is pushed toward the insertion part or the insertion part is pushed toward the hollow body by a piston mechanism. The invention according to claim 4 is the method according to any one of claims 1 to 3, wherein the lid that closes the opening of the hollow body at the time of the primary molding is injection molded substantially simultaneously, and after the final insertion step, The invention according to claim 5 is the method according to any one of claims 1 to 4, in which the lid is joined to the opening of the hollow body by secondary injection molding. The invention according to claim 6 is formed so that at least a part of the outer peripheral portion of the insertion part is formed into a shape to be inserted along the inner peripheral surface of the hollow main body when forming. By the method according to any one of items 5 to 5, A hollow body for type camera, and a composite molded article comprising a camera lens to be inserted therein so as to obtain in the mold.

The invention according to claim 7 comprises a fixed side mold, and a movable side mold that is opened and closed with respect to the fixed side mold and is slidably driven, and the parting surfaces of these molds In the meantime, a body cavity for molding a hollow body at least one of which is open, and a part cavity for molding an insertion part to be inserted into the hollow body are formed, and the moving side mold The hollow body formed by the body cavity is left in one of the fixed side mold and the moving side mold, and the insertion part formed by the part cavity is left on the other mold. The mold can be opened, and the movable mold can be driven to a position where the main body cavity is aligned with the component cavity, and is inserted in the component cavity by a mold clamping operation at the alignment position. Part There configured to be inserted into the hollow body is molded in the cavity for the body.
The invention according to claim 8 is composed of a fixed side mold and a moving side mold that is opened and closed with respect to the fixed side mold and is slidably driven, and the parting surfaces of these molds In between, there are formed a body cavity for molding a hollow body having at least one opening, and a plurality of component cavities for molding a plurality of insertion parts to be inserted into the hollow body. The moving side mold has a hollow body formed by the body cavity as one of the fixed side mold and the moving side mold, and a plurality of insertion parts formed by the component cavity. The mold on the moving side can be driven to a position where the main body cavity is aligned with each of the plurality of component cavities, and the mold at each alignment position can be left open on the other mold. By tightening operation, Configured insertion part being molded by use cavity is inserted into the hollow body is molded in the body cavity.

  According to a ninth aspect of the present invention, in the mold according to the seventh or eighth aspect, an opening portion of a hollow main body formed by a main body cavity is formed between the parting surfaces of the fixed side mold and the movable side mold. A lid cavity for molding a lid for closing the lid is also formed, and the movable mold can be driven to a position where the main body cavity is aligned with the lid cavity, and the mold is clamped at this alignment position. When the molten resin is injected, the hollow body formed by the body cavity and the lid formed by the lid cavity are integrally joined, and the invention according to claim 10 10. The mold according to claim 7, wherein the main body cavity or the component cavity is formed by a hollow main body formed by the main body cavity or an insert formed by the component cavity. Goods and configured so that the piston mechanism is provided to push the parting surface.

  As described above, according to the present invention, a resin-made hollow main body and an insertion part to be inserted into the hollow main body or a hollow main body and the hollow using the fixed-side mold and the moving-side mold are used. An insertion part to be inserted into the main body and a lid that closes the opening of the hollow main body are injection-molded substantially simultaneously by primary injection molding, and the hollow main body is either the fixed mold or the movable mold. The mold is opened with the insertion part left in the other mold, and the moving side mold is moved relative to the fixed side mold, and the opening of the hollow body and the Positioning so as to face the insertion part, and driving the moving mold in the mold closing direction to insert the insertion part into the hollow body by this mold closing operation, or secondary injection after insertion Since the opening of the hollow body is sealed with a lid by molding The hollow body and the insert part, or a hollow body and an insertion part and the lid by injection molding in a mold, and the effect of specific obtain the present invention that can be assembled in the mold. As described above, according to the present invention, since molding and assembly can be performed in the mold, it is possible to prevent problems such as adhesion of dirt, generation of defective products, and the like. In addition, since a special handling device or the like is not particularly required, a composite molded product can be obtained at a low cost with a simple structure and an inexpensive mold. Since the structure is simple, maintenance is easy.

  According to another invention, a composite molded product in which a plurality of insertion parts are sequentially inserted can be obtained in the mold, and according to another invention, the hollow body is directed toward the insertion part or the insertion part during the insertion process. Is pushed out toward the hollow body by the piston mechanism, the effect that the insertion of the insertion part is further ensured is further obtained. According to still another invention, a frame with a lens for a small camera to be attached to an electronic device such as a mobile phone can be easily molded and assembled in a mold.

  Hereinafter, an example in which the embodiment of the present invention is applied to molding and assembling of a cylindrical frame with two lenses for a small camera will be described. As shown in FIG. 5, the lens-equipped frame 30 for the small camera has a cylindrical frame 33 having a through hole 32 for transmitting light at the bottom and an opening on one side, and the cylindrical frame. The first and second lenses 35 and 37 are inserted into the inner space 33 at a predetermined interval, and the lid body 38 closes the opening of the cylindrical frame 33. Around the first and second lenses 35 and 37, cylindrical first and second lens holders 35h and 37h having a predetermined length in the axial direction are integrally formed, and the lid 38 is for light passage. A through hole 39 and a joining space s are formed. An example will be described in which such components are injection-molded substantially simultaneously by injection molding, and these components are assembled in a mold as shown in FIG.

  FIG. 1 is a view showing a molding / assembly mold for injection molding and assembling the constituent members of the lens-equipped frame 30 for a small camera described above, and FIG. FIG. 2B is a cross-sectional view showing details of the fixed side mold and the movable side mold when the movable side mold is opened. As shown in these drawings, the molding and assembling mold according to the present embodiment is roughly composed of a fixed platen 1, a movable platen 2 that is opened and closed with respect to the fixed platen 1, a fixed platen. The fixed side mold 3 is attached to the panel 1 and the movable side mold 4 is slidably attached to the movable board 2. The fixed side mold 3 is provided with first and second sprue bushes as well known in the art, and the injection nozzles of the first and second injection units 5 and 6 are arranged so as to cross the fixed platen 1 respectively. Touch the bush. In detail, the first and second sprue bushes are connected to first and second sprues 5a and 6a that communicate with a cavity to be described later. The first injection unit 5 does not transmit light or does not diffusely reflect, for example, colored resin is injected, and the second injection unit 6 emits transparent resin that transmits light. Yes.

  According to the present embodiment, the drive device for slidingly moving the movable mold 4 in the vertical direction along the movable platen 2 is composed of an electric servo motor whose position can be controlled more accurately. That is, the bracket 7 is fixed to the upper part of the movable platen 2, and the ball nut 9 is fixedly attached to the tip of the horizontal arm of the bracket 7. The ball screw 8 screwed into the ball nut 9 extends downward and is attached to the upper part of the moving side mold 4 so as to allow rotation. Therefore, although not shown in FIG. 1, when the ball screw 8 is rotationally driven by the electric servo motor, the ball nut 9 is fixed, so that the ball screw 8 moves up and down, and the movable die 4 is slid. Will be driven in the vertical direction.

  At the lower position of the fixed-side mold 3 configured in this manner, as shown in an enlarged view in FIG. A columnar frame core 3a is formed. A cavity for molding the cylindrical frame 33 is constituted by the frame core 3a. A first lens recess 3b having a concave shape for forming the first lens 35 is formed above the frame core 3a. A relatively deep and narrow first lens holder recess 3b 'is formed in communication with the periphery of the first lens recess 3b. About half of the first lens holder 35 h is formed integrally with the first lens 35 by the lens holder recess 3 b ′. A similar second lens recess 3c for forming the second lens 37 is formed at a predetermined distance from the first lens recess 3b. A relatively deep and narrow second lens holder recess 3c 'is also formed around the second lens recess 3c. About half of the second lens holder 37 h is molded integrally with the second lens 37 by the lens holder recess 3 c ′.

  In the upper position of the fixed mold 3, a lid recess 3 d for forming the lid 38 that is recessed from the parting surface P is formed. A through-hole core 3e that reaches the parting surface P is provided at a substantially central position of the bottom of the lid recess 3d, and a step 3d 'is provided at a position rising from the peripheral wall of the bottom of the lid recess 3d at a predetermined height. Each is formed. The through hole 39 is formed in the lid body 38 by the through hole core 3e, and the joining space portion s for secondary forming is formed by the step portion 3d '.

  The parting surface P ′ of the moving side mold 4 corresponds to the frame core 3a, the first and second lens recesses 3b and 3c, the lid recess 3d, etc. of the fixed side mold 3, As will be described below, a recess and a core are formed. In other words, a frame recess 4 a is provided on the parting surface P ′ of the moving mold corresponding to the frame core 3 a of the fixed mold 3. The diameter of the frame recess 4a is larger than the diameter of the frame core 3a by the thickness of the cylindrical frame 30. The bottom of the frame recess 4a is a piston head 10a of the piston mechanism 10, which will be described later.

  Corresponding to the first lens recess 3b of the fixed side mold 3, the moving side mold 4 has a first lens recess 4b corresponding to the first lens holder recess 3b '. Lens holder recesses 4b 'are provided respectively. The outer diameters of these lens holder recesses 3b 'and 4b' are slightly smaller than the inner diameter of the frame recess 4a. Therefore, the first and second lens holders 35h and 37h can be inserted into the cylindrical frame 33. However, once inserted, the first and second lens holders 35h and 37h do not move unnaturally. Similarly, the second lens concave portion 4c corresponds to the second lens holder concave portion 3c ′ corresponding to the second lens concave portion 3c of the fixed mold 3 and the second lens holder concave portion 3c ′ corresponding to the second lens holder concave portion 3c ′. Second lens holder recesses 4c ′ are respectively provided. Corresponding to the step 3 d ′ of the fixed mold 3, the moving mold 4 is formed with an annular joining core 4 d protruding from the parting surface P ′.

  The bottom of the frame recess 4 a formed in the movable mold 4 is composed of a piston head 10 a of the piston mechanism 10. The piston head 10a is provided so as to be able to move smoothly while being in contact with the cylindrical peripheral surface of the frame recess 4a. A cylindrical small core 10b is provided on the upper surface of the movable piston head 10a. The height of the small core 10 b is the thickness of the bottom of the cylindrical frame 33, whereby the through hole 32 is formed in the cylindrical frame 33. A cylinder device or the like for driving the piston rod 10c of the piston mechanism 10 is provided inside the moving side mold 4, but is not shown in FIG.

  The fixed mold 3 configured as described above is provided with a first sprue 5 a communicating with the first injection unit 5. The first sprue 5a branches into upper and lower runners 5b and 5b ', and the lower runner 5b' opens to the parting surface P in the vicinity of the frame core 3a of the fixed mold 3 through a gate. The upper runner 5b opens at the side of the lid recess 4d. Further, from the upper runner 5b, although not shown in FIG. 1A, a secondary molding runner 5c branches via a runner switching device or the like. The secondary molding runner 5c opens to the step 3d 'of the lid recess 3d. Similarly, the fixed-side mold 3 is provided with a second sprue 6a communicating with the second injection unit 6, and the second sprue 6a is branched, and the first and the second sprues 6a are connected via the respective gates. The lens holder recesses 3b 'and 3c' are opened.

  Next, a method for molding and assembling a lens with a frame for a small camera using the molding and assembling mold according to the above embodiment will be described. The moving side mold 4 is slidably driven to the primary molding position by rotating the ball screw 8 by an electric servo motor. Then, mold clamping is performed. A state where the mold is clamped at the primary molding position is shown in FIG. 1A, and the details thereof are shown in FIG. When the mold is clamped, the piston head 10a of the piston mechanism 10 is pushed by the frame core 3a of the stationary mold 3 and retracts. A cavity core Fc for molding the cylindrical frame 33 is constituted by the frame core 3a of the fixed mold 3, the frame recess 4a of the movable mold 4, and the piston head 10a.

  At the same time, the first lens recess 3 b and the first lens holder recess 3 b ′ of the fixed mold 3, the first lens recess 4 b and the first lens holder recess 4 b ′ of the moving mold 4 are used. Thus, a cavity Rc1 is formed for molding the first lens 35 with the lens holder 35h. Similarly, a cavity Rc2 is formed for molding the second lens 37 with the second lens holder 37h. Further, the concave portion 3d, the step portion 3d ′ and the through-hole core 3e of the fixed-side mold 3 and the parting surface P ′ and the bonding core 4d of the movable-side mold 4 are used for forming the lid body. A cavity Cc is formed. FIG. 2A shows a state in which such cavities Fc, Rc1, Rc2, and Cc are formed between the parting surfaces P and P ′.

  Next, primary injection molding is performed. That is, an opaque molten resin suitable for molding the cylindrical frame 33 and the lid 38 is injected from the first injection unit 5. The molten resin is filled into the cavity Cc for molding the lid and the cavity Fc for molding the cylindrical frame through the sprue 5a, the upper and lower runners 5b, 5b 'and the respective gates. Thereby, the cover body 38 with the through-hole 39 and the cylindrical frame 33 with the same through-hole 32 and one side opened are formed substantially simultaneously. Almost simultaneously, a transparent molten resin suitable for the first and second lenses 35 and 37 is injected from the second injection unit 6. The molten resin is filled from the second sprue 6a into the cavities Rc1 and Rc2 through the respective gates. Thereby, the 1st and 2nd lenses 35 and 37 with the lens holders 35h and 37h are shape | molded. The state where the primary injection molding is completed in this way is shown in FIG.

  Waiting for cooling and solidification, the moving mold 4 is opened. At this time, the cylindrical frame 33 is moved toward the movable mold 4 by the frictional resistance, shape, surface area difference, and other means, and the first and second lenses 35 and 37 and the lid 38 are fixed to the fixed mold 3. Will be left open. The moving-side mold 4 is driven to rotate the ball screw 8 by an electric servo motor, and the opening of the cylindrical frame 33 coincides with the position of the first lens 35 remaining in the fixed-side mold 3, or Drive slid to the matching position. Next, the assembly operation of the first lens 35 is started. That is, the first and second lenses 35 and 37 and the lid 38 remaining on the fixed side mold 4 are not in contact with the parting surface P ′ of the movable side mold 4 and the opening of the cylindrical frame 33. Close the moving mold 4. Then, the cylindrical frame 33 is pushed out toward the first lens 33 by the piston head 10a. Thereby, a part of the lens holder 35 h of the first lens 35 enters the inside of the cylindrical frame 33. The state in which the first lens 35 is inserted into the cylindrical frame 35 in this way is shown in FIG. In FIGS. 3A, 3A, and 3C, the parting surfaces P and P 'are shown to be relatively wide for the sake of clarity.

  Next, the moving side mold 4 is opened. At this time, the first lens 35 is opened in a state of being inserted into the cylindrical frame 33 due to the shape of the first lens holder 35h, the difference in surface area, and the like. The ball screw 8 is rotationally driven, and the first lens 35 inserted into the cylindrical frame 33 is slidably driven to a position aligned with the position of the second lens 37 remaining in the stationary mold 3. Next, the parting surface P ′ of the moving side mold 4 and the first lens 35 inserted into the cylindrical frame 33 are in contact with the second lens 37 and the lid 38 remaining on the fixed side mold 4. Close the moving side mold 4 to the extent that it does not. Then, the cylindrical frame 33 is pushed out toward the first lens 33 by the piston head 10a. As a result, the lens holder 35h of the first lens 35 inserted in the cylindrical frame 33 is pushed, and a part of the lens holder 37h of the second lens 37 enters. A state in which the first and second lenses 35 and 37 are inserted into the cylindrical frame 35 in this manner is shown in FIG.

  Open the moving mold 4. The ball screw 8 is rotationally driven, and the second lens 37 inserted into the cylindrical frame 33 is slid to the position where it is aligned with the lid 38 remaining on the stationary mold 3, that is, to the secondary molding position. To drive. A state in which the moving side mold 4 is aligned with the secondary molding position is shown in FIG.

  The moving side mold 4 is clamped with respect to the fixed side mold 3. When the mold is clamped, the lens holder 37 h of the second lens 37 is pushed by the lid 38 to be the same surface as the opening end surface of the cylindrical frame 33, and the step between the opening end surface of the cylindrical frame 33 and the lid 38. The joint space s shown in FIG. Molten resin is injected from the first injection unit 5. The molten resin passes through the first sprue 5a, the upper runner 5b, and the secondary molding runner 5c and is filled into the joining space s from the gate. Thereby, the cylindrical frame 33 and the lid 38 are integrated. When the moving mold 4 is opened after cooling and solidification, the ejector pin protrudes as is conventionally known, and a lens-equipped frame 30 for a small camera as shown in FIG. 5 is obtained. Thereafter, the lens-equipped frame 30 is obtained in the same manner.

  The present invention can be implemented in various forms without being limited to the above embodiment. For example, in the above embodiment, the cylindrical frame 33 is formed on the moving side mold 4 and the piston mechanism 10 is also provided on the moving side mold 4, but the cylindrical frame 33 is fixed on the fixed side. It is obvious that the same operation can be carried out even if the molding is performed by the mold 3 and the piston mechanism 10 is also provided in the stationary mold 3. Further, the cylindrical frame 33 is formed by the moving-side mold 4, and the first and second lenses 35 and 37 remaining in the fixed-side mold 3 are provided in the fixed-side mold 3. , 11 'can also be carried out. The embodiment is schematically shown in FIG. Although not described in detail, according to the present embodiment, part of the cavities for molding the first and second lenses 35 and 37 are formed by the piston heads 11a and 11a 'of the piston mechanisms 11 and 11'. Therefore, the cylindrical frame 33 held by the moving-side mold 4 is aligned with the first lens 35 of the fixed-side mold 3, and the fixed-side mold 4 is driven in the mold closing direction so that the parting surface P, When the space between P ′ is narrowed and the first lens 35 is pushed out by the piston head 11 a, the first lens 35 is inserted to a predetermined position in the cylindrical frame 33. The second lens 37 is inserted in the same manner.

  Furthermore, the present invention can be implemented without providing a piston mechanism. That is, the first and second lenses 35 and 37 are sequentially inserted into the cylindrical frame 33 remaining in the moving mold 4 by the operation of clamping the moving mold 4 to the fixed mold 3. You can also. A part of the embodiment is shown in FIG. In FIG. 4A, when the movable mold 4 is driven in the mold closing direction and the lens holder 35h of the first lens 35 is inserted into the cylindrical frame 33, the movable mold 4 is moved before the insertion operation is completed. When the second lens 37, the lid 38, etc. interfere with the parting surface P ′ of the mold 4, the parting surface P ′ of the moving mold 4 is retracted from the interference position. For example, the moving side mold 4 is rotated in the arrow A direction by a predetermined angle. Then, the mold can be clamped without interference. When implemented in this manner, the moving side mold 4 is a mold that can slide and rotate.

  According to the molding / assembling method of the present invention, a composite molded product in which components are inserted into the hollow body can be molded and assembled with a pair of molds. Can mold and assemble various molded products. For example, a line filter installed in the middle of a pipe is composed of a short pipe and a mesh-like filter inserted into the pipe. Obviously, it can be molded and assembled in a mold. It is also clear that the inner shape of the hollow body can be implemented by a polygon other than a circle, such as a quadrangle, a pentagon, or a hexagon. Further, it is clear that the inner peripheral surface of the hollow body and the outer peripheral surface of the insertion part do not necessarily need to contact each other, and can be implemented in the same manner even if a part of them is in contact with the positioning.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the metal mold | die which concerns on embodiment of this invention, The (a) is a front view shown with a partial cross section in the state which closed the metal mold | die, The (a) is sectional drawing shown in detail in the open state It is. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which expands and shows the metal mold | die which concerns on embodiment of this invention, The (a) is a closed state, The (a) is sectional drawing shown in the state after primary injection molding was completed. It is a figure which shows the state of the metal mold | die in each step of the assembly method which concerns on embodiment of this invention, (a) is the state after insertion of the 1st lens, (a) is the state of the 2nd lens FIG. 4 is a cross-sectional view showing a state in which insertion is completed, (c) is in a state of being aligned with a lid, and (d) is a state in which secondary injection molding is completed. It is a figure which shows other embodiment of this invention, The (a) and (b) are sectional drawings which show the principal part of other embodiment which each differs. It is sectional drawing which shows the flame | frame with the lens for small cameras shape | molded and assembled by this Embodiment. It is sectional drawing which shows the flame | frame with the lens for small cameras manufactured by the conventional manufacturing method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Fixed side metal mold | die 4 Movement side metal mold | die 5 1st injection unit 6 2nd injection unit 3a Frame core 3b 1st lens recessed part 3c 2nd lens recessed part 3d Recessed part 4a Frame recessed part 4b First lens recess 4c Second lens recess 4d Bonding core

Claims (10)

Using a stationary mold and a movable mold that is opened and closed with respect to the stationary mold and is movable, a resin-made hollow body having at least one opening, and being inserted into the hollow body The resin-made insertion part is injection-molded almost simultaneously, and the insertion part is inserted into the hollow body from the opening to obtain a composite molded product comprising the hollow body and the insertion part in the mold.・ Assembly method,
A primary molding step in which the moving side mold is clamped with respect to the fixed side mold, and the hollow body and the insertion part are injection-molded substantially simultaneously;
Waiting for solidification of the hollow main body and the insertion part formed by the primary molding step, the hollow main body is left in one of the fixed side mold and the moving side mold, and the insertion part Is a mold opening process in which the mold is opened while remaining in the other mold,
An alignment step of moving the moving side mold opened by the mold opening step with respect to the fixed side mold and aligning the opening of the hollow body and the insertion part;
A final insertion step of driving the moving-side mold aligned in the alignment step in the mold closing direction and inserting the insertion part into the hollow body;
After the final insertion step, the movable mold is opened to obtain a composite molded product comprising the hollow main body and an insertion part inserted into the hollow main body. Molding and assembly method to obtain products. Using a stationary mold and a movable mold that is opened and closed with respect to the stationary mold and is movable, a resin-made hollow body having at least one opening, and being inserted into the hollow body A plurality of resin-made insert parts to be molded at substantially the same time, and the insert parts are sequentially inserted into the hollow body from the opening to form the hollow body and the plurality of insert parts. A molding / assembly method for obtaining a product in a mold,
A primary molding step in which the moving side mold is clamped to the fixed side mold, and the hollow main body and the plurality of insertion parts are injection-molded;
Waiting for solidification of the hollow main body and the plurality of inserted parts formed by the primary forming step, the hollow main body is left in one of the fixed side mold and the moving side mold, A first mold opening step in which the plurality of insertion parts are opened in a state of being left in the other mold;
The moving side mold opened by the first mold opening step is moved with respect to the fixed side mold, and the opening of the hollow body and the first insertion part among the plurality of insertion parts A first alignment step of aligning so as to face each other;
A first insertion step of driving the moving-side mold aligned in the first alignment step in a mold closing direction and inserting the first insertion component into the hollow body;
A second mold opening step of opening the mold in a state where the hollow main body into which the first insertion component is inserted is left in the mold by the first insertion step;
A second positioning step of moving the moving mold that has been opened in the second mold opening step so that the opening of the hollow body and the second insertion part face each other. When,
A second insertion step of driving the movable mold aligned in the second alignment step in a mold closing direction and inserting the second insertion component into the hollow body;
A third mold opening step of opening the mold while leaving the hollow body in the mold in a state where the first and second insertion parts are inserted;
Hereinafter, in the same manner, each of the above steps is repeated, and a final insertion step of sequentially inserting a plurality of insertion parts into the hollow body, and
After the final insertion step, the movable mold is opened to obtain a composite molded product comprising the hollow main body and a plurality of inserted parts inserted into the hollow main body. Forming and assembling methods to obtain composite molded products with 3. The method according to claim 1 or 2, wherein, during the insertion step, the hollow body is pushed toward the insertion part or the insertion part is pushed toward the hollow body by a piston mechanism. Molding and assembly method to obtain. The method according to any one of claims 1 to 3, wherein a lid that closes the opening of the hollow body at the time of primary molding is also injection molded substantially simultaneously, and the lid is closed on the opening of the hollow body after the final insertion step. A molding and assembling method for obtaining a composite molded product in a mold characterized by joining the bodies by secondary injection molding. 5. The method according to claim 1, wherein when the hollow main body and the insertion part are molded, at least a part of the outer peripheral part of the insertion part is inserted along the inner peripheral surface of the hollow main body. A molding / assembling method for obtaining a composite molded product in a mold, characterized by molding into a molded shape. A molding and assembling method for obtaining, in a mold, a composite molded product comprising a hollow main body for a small camera and a camera lens inserted therein by the method according to claim 1. It consists of a fixed mold and a movable mold that is slid and driven with respect to the fixed mold.
Between the parting surfaces of these molds, there is a main body cavity for molding a hollow main body at least one of which is open, and a component cavity for molding an insertion part inserted into the hollow main body. Formed,
The moving side mold has a hollow body formed by the body cavity as one of the fixed side mold and the moving side mold, and an insertion part formed by the component cavity is the other mold. You can leave the mold open and
The moving side mold can be driven to a position where the main body cavity is aligned with the component cavity, and an insert part formed by the component cavity is moved by the mold clamping operation at the alignment position. A mold for assembling and assembling to obtain a composite molded product in a mold, wherein the mold is inserted into a hollow body molded by It consists of a fixed mold and a movable mold that is slid and driven with respect to the fixed mold.
Between the parting surfaces of these molds, there are a plurality of body cavities for forming a hollow body having at least one opening and a plurality of insertion parts to be inserted into the hollow body. Individual component cavities are formed,
The moving side mold has a hollow body formed by the body cavity as one of the fixed side mold and the moving side mold, and a plurality of insertion parts formed by the component cavity at the other side. The mold can be opened and left on the mold,
The moving side mold can be driven to a position where the main body cavity is aligned with each of the plurality of component cavities, and an insertion part formed in the component cavity is clamped at each alignment position. A molding / assembly mold for obtaining a composite molded product in a mold, wherein the mold is inserted into a hollow body molded by the body cavity. The mold according to claim 7 or 8, wherein a lid for closing an opening of a hollow main body formed by a main body cavity is formed between the parting surfaces of the fixed side mold and the movable side mold. A lid cavity is also formed,
The moving-side mold can be driven to a position where the main body cavity is aligned with the lid cavity. When the mold is clamped at this alignment position and molten resin is injected, the movable mold is hollow formed in the main body cavity. A molding and assembling mold for obtaining a composite molded product in a mold, wherein a main body and a lid formed by the lid cavity are integrally joined. 10. The mold according to claim 7, wherein the main body cavity or the component cavity has a hollow main body formed by the main body cavity or an insert component formed by the component cavity. 10. A mold for assembling and assembling to obtain a composite molded product in a mold, wherein a piston mechanism is provided for extruding the part to the parting surface side.

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