JP5635385B2 - Manufacturing method of insert molded product - Google Patents

Description

  The present invention relates to a method of manufacturing an insert molded product such as a switch pole board.

  Conventionally, as a method of manufacturing this type of insert molded product, for example, as described in Patent Document 1 below, a punch that moves in conjunction with the movement of a mold is brought into contact with a connecting portion of a conductive plate, When the mold is clamped, the conductive plate is cut and inwardly bent to form a conductive plate with the cut-off shape, and then injected into the mold after clamping A method is known in which resin is passed through a connecting portion of a conductive plate that has been cut and internally bent to insert-mold the conductive plate.

Japanese Patent No. 3674728

  However, according to the prior art according to the above-mentioned Patent Document 1, since there is one in which an insulating resin is passed through the cut and inwardly bent connecting portion of the conductive plate and insert molding is performed, the positioning of the conductive plate in the mold is performed. However, in order to accurately position the conductive plate in the mold, it must be positioned with the lower mold of the mold, and an insulating resin is passed around the part holding the conductive plate. However, at least a part of the conductive plate must be exposed and insert molded.

  In addition, in an insert molded product in which a part of the conductive plate is exposed, the exposed part of the conductive plate cannot be reliably insulated. There is a possibility that it may enter, and there are problems such as that the use is limited because no measures against drip-proofing and dust-proofing are taken.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems in the prior art, and to provide a method for manufacturing an insert-molded product that can reliably position an insert member and can be reliably shielded.

In order to solve this problem, the present invention according to claim 1 is a method of manufacturing an insert-molded product in which an insert member is installed in a mold, a resin material is injected into the mold, and the insert member is insert-molded. A mold clamping step of positioning an insert member installed in the mold with a pressing pin; an injection step of injecting the resin material into the mold; and An increase in the pressure of the resin material in the mold that occurs when the resin material is filled and the resin material is not cured and the resin material is completely filled in the mold. the insert switch by being pressurized on, in which the pin extraction step to initiate retraction of the pressing pin, the insert member and the mold is opened in a state where the resin material is cured is insert-molded on the basis of And retrieval process to retrieve the molded article, a method of manufacturing the insert molded article comprising the.

According to a second aspect of the present invention, in the method for manufacturing an insert-molded product according to the first aspect , in the pin removal step, the resin material injected into the mold in the injection step is passed through the gap between the retracted presser pin and the insert member. The presser pin is retracted in a state where it is possible.

According to a third aspect of the present invention, in the method for manufacturing an insert-molded product according to the first or second aspect , in the pinning step, the pressure of the resin material passing through the supply pipe for pouring the resin material into the mold is increased from a predetermined value. In this case, the presser pin is retracted.

According to a fourth aspect of the present invention, in the method of manufacturing an insert-molded product according to any one of the first to third aspects, the insert member has a shape connected by a connecting portion, and after the mold clamping step, the punch is brought into contact with the connecting portion, It has a cutting process to make an insert member with a shape in which the connecting portion is cut off, and the pin pulling process is characterized in that the presser pin and the punch are retracted in a state before the injected resin material is cured. .

According to a fifth aspect of the present invention, in the method of manufacturing an insert-molded product according to the fourth aspect of the present invention, the cutting step has a shape in which the punch is brought into contact with the connecting portion, and the connecting portion is cut and internally bent to cut the connecting portion. The insert member is formed, and the pin removing step is performed by retracting the punch together with the presser pin before the injected resin material is cured, and between the retracted presser pin and the insert member, and cutting / inward bending. The insert member is insert-molded by passing the resin material between each of the connected portion and the punch.

  According to the present invention, after the insert member installed in the mold is positioned by pressing the holding pin, the resin material is injected into the mold, and the mold is filled with the resin material, and this In the state before the resin material is cured, the presser pin is retracted, the mold is opened in the state where the resin material is cured, and the insert member is taken out and the insert molded product is taken out. Since the insert member can be insert-molded while the resin material is poured into the gap between the retracted presser pin and the insert member, the insert member can be reliably positioned by pressing the insert member with the presser pin. The portion where the member is pressed by the pressing pin can be reliably shielded by the resin material.

  At this time, the insert in the mold is started by starting the retraction of the presser pin based on the increase in the pressure of the resin material in the mold that occurs when the filling of the resin material into the mold is completed. Since the timing for starting the retraction of the presser pin for pressing and positioning the member can be mechanically grasped, the control for starting the retraction of the presser pin can be reliably performed with a simple configuration.

  In addition, in a state where the presser pin is retracted by retracting the presser pin in a state where the resin material injected into the mold can be passed through the gap between the retracted presser pin and the insert member, Since the resin material can be surely poured into the gap between the presser pin and the insert member, the portion of the insert member pressed by the presser pin can be more reliably shielded with the resin material.

  Furthermore, when the pressure of the resin material passing through the supply pipe for pouring the resin material into the mold rises above a predetermined value, the resin material is sufficiently injected into the mold, so in this state By retracting the presser pin, the presser pin can be reliably retracted in a state before the resin material in the mold is cured. Therefore, the resin material can be surely poured into the gap between the retracted presser pin and the insert member, and the portion pressed by the presser pin of the insert member can be more reliably shielded with the resin material. it can.

  Further, after the mold is clamped, the punch is brought into contact with the connecting portion of the insert member, and after the connecting portion is cut into an insert member, a resin material is injected into the mold, and this injection is performed. In a state before the resin material is cured, the presser pin and the punch are retracted, and the insert member is insert-molded while the resin material is rotated between the retracted presser pin and the insert member, and each of the disconnected connecting portions. it can. For this reason, since the connection part of an insert member is cut off at the time of insert molding, and this cut-off connection part can be covered with a resin material and shielded, a cutting operation for cutting the connection part of the insert member after insert molding is unnecessary. Therefore, the production efficiency of the insert molded product can be increased.

  Further, the punch is brought into contact with the connecting portion, the connecting portion is cut and inwardly bent to form an insert member having a shape in which the connecting portion is cut off, and then the resin material is injected. In the state before curing, the punch is retracted together with the presser pin, and the resin material is passed between the retracted presser pin and the insert member, and between the cut and inwardly bent connecting portion and the punch. By insert-molding the insert member, the resin material also flows between the cut and inwardly bent connecting portion and the punch to be shielded. Even if it is formed, since this burr is covered with a resin material and shielded, it is possible to reliably prevent leakage, exposure, and the like associated with the formation of this burr.

It is a schematic sectional drawing which shows the clamping state of the metal mold | die used for the manufacturing method of the insert molded product by the 1st Embodiment of this invention. It is a schematic sectional drawing which shows the state which injected the resin material in the said metal mold | die. It is a schematic sectional drawing which shows the state which retracted the pressing pin of the said metal mold | die. It is a schematic plan view which shows the supply pipe | tube of the said metal mold | die. It is a schematic sectional drawing which shows the clamping state of the metal mold | die used for the manufacturing method of the insert molded product by the 2nd Embodiment of this invention. It is a schematic sectional drawing which shows the state which cut | disconnected the connection part of the insert member with the punch of the said metal mold | die. It is a schematic sectional drawing which shows the state which retracted the presser pin and punch of the said metal mold | die.

  A method for manufacturing an insert-molded product according to a first embodiment of the present invention will be described with reference to FIGS.

  The manufacturing apparatus 1 used for the manufacturing method of this insert molded product A is a two-plate type insert molding device, and is a drip-proof measure for the conductive plate B as an insert member (terminal) that is insert-molded in the insert molded product A. Can be applied. Here, the conductive plate B is a conductive plate formed of, for example, a conductive metal material such as copper, and after being insert-molded into the insert-molded product A, for example, a switch pole board / terminal It becomes a part that plays the role of a fixed contact. And the manufacturing apparatus 1 is equipped with the metal mold | die 4 comprised by the upper mold | type 2 and the lower mold | type 3, and the shaping | molding part which is a resin filling area | region between the upper mold | type 2 and the lower mold | type 3 of this metal mold | die 4 After the conductive plate B is installed and placed in the molding space 5 as a molding space, the molding space 5 between the upper die 2 and the lower die 3 in a state where the upper die 2 and the lower die 3 are clamped. By injecting and injecting an insulating resin C which is a resin material, an insert molded product A in which the conductive plate B is insert-molded is manufactured.

  That is, the mold 4 includes an upper mold 2 that constitutes about a half of the upper side of the mold 4 and a lower mold 3 that constitutes about a half of the lower side of the mold 4. . A lower mold space 31 is formed on the molding surface 3a, which is the upper surface of the lower mold 3, so as to form a molding region having a substantially concave cross section opened upward. A plurality of, for example, three support pieces 32 for supporting the conductive plate B placed in the lower mold space 31 protrude from the bottom 31 a of the lower mold space 31. These support pieces 32 are provided at a predetermined interval, and are vertically extended from the bottom 31a of the lower mold space 31 to a height of about one half of the thickness direction of the lower mold space 31 along the vertical direction. Protruding.

  Moreover, the front-end | tip part of this support piece 32 is made into the flat mounting surface 32a. This mounting surface 32a is for mounting the conductive plate B during insert molding. Further, at the opening edge of the lower mold space 31 of the lower mold 3, a half of the lower side of the resin injection port 6 is configured as a supply pipe for injecting the insulating resin C into the lower mold space 31. A lower injection recess 33 is provided. The lower injection recess 33 is linearly provided from the opening edge of the lower mold space 31 of the lower mold 3 to the edge of the lower mold 3.

  On the other hand, an upper mold space 21 serving as a molding region having a substantially concave cross section opened downward is also provided on the molding surface 2a which is the lower surface of the upper mold 2 of the mold 4. A pin insertion hole 22 penetrating from the upper mold space 21 toward the outside of the upper mold 2 is formed in the bottom portion 21 a of the upper mold space 21. For example, about three pin insertion holes 22 are provided at a predetermined interval so as to be opposed to the support piece 32 of the lower mold 3. And the upper injection | pouring which comprises about 1/2 of the upper side of the resin injection port 6 for inject | pouring the insulating resin C in this upper mold | type space 21 also to the opening edge of the upper mold | type space 21 of the upper mold | type 2 A recess 23 is provided. The upper mold injection recess 23 is provided in a straight line from the opening edge of the upper mold space 21 of the upper mold 2 to the edge of the upper mold 2.

  Further, an elongated cylindrical presser pin 24 is inserted and attached to each pin insertion hole 22 of the upper mold 2, and these presser pins 24 are inserted through the respective pin insertion holes 22 and penetrated. These pin insertion holes 22 are attached so as to be able to advance and retract along the axial direction. These presser pins 24 are formed to have a diameter smaller than the width of the support piece 32 of the lower mold 3, and the upper mold space 21 of the upper mold 2 faces the lower space 31 of the lower mold 3 to clamp the mold. In this state, the support pieces 32 are attached to positions opposed to the center. Further, horizontal press surfaces 24 a perpendicular to the axial direction are formed at the tips of the press pins 24, and the press surfaces 24 a are used to connect the conductive plate B placed in the lower space 31 of the lower mold 3. It is pressed and positioned.

  And the base end side which protrudes from the upper mold | type 2 of each of these presser pins 24 is attached and fixed to the moving plate 25 for making these presser pins 24 move forward and backward simultaneously. The moving plate 25 is attached in parallel along the upper surface 2b located on the upper side of the upper mold 2, and a spring 27 serving as an elastic member is provided between the moving plate 25 and a support plate 26 disposed opposite to the moving plate 25. Is attached and is urged by the spring 27 toward the upper surface 2 b of the upper mold 2. Here, the support plate 26 is attached and fixed in parallel to the upper surface 2b of the upper mold 2 at a predetermined interval. Further, a plurality of, for example, two springs 27 are installed between the support plate 26 and the moving plate 25 at a predetermined interval, and the axial direction of each of the springs 27 is set in the thickness direction of the moving plate 25. It is attached along.

  Further, as shown in FIG. 4, the resin injection port 6 is formed in the resin injection port 6 formed by the upper injection recess 23 and the lower injection recess 33 by clamping the upper mold 2 and the lower mold 3. A resin injection pipe 51 for injecting the insulating resin C into the molding space 5 of the mold 4 can be connected via the connection port 52, which is a connection point between the resin injection pipe 51 and the resin injection port 6. Is attached with a switch 53 that turns on when the pressure of the insulating resin C injected into the resin injection pipe 51 rises above a predetermined value. In this switch 53, the insulating resin C injected from the resin injection pipe 51 into the molding space 5 of the mold 4 through the resin injection inlet 6 passes through the molding space 5, the resin injection inlet 6, and the resin injection pipe 51. When filled, the switch 53 in the insulating resin C causes the pressure (internal pressure) of the insulating resin C filled in the molding space 5, the resin injection port 6 and the resin injection pipe 51 to rise by a predetermined value or more. Is turned on by being pressed, that is, pushed, so that the pressure of the insulating resin C is not increased, and the switch 53 is turned off when the pressure of the insulating resin C decreases. The switch 53 is attached to the distal end portion of the introduction pipe 53a whose proximal end is connected to the connection port 52, and is turned on and off by the insulating resin C flowing into the introduction pipe 53a. The introduction pipe 53a has an inner diameter smaller than the inner diameter of the resin injection pipe 51 in order to operate the switch 53 more accurately.

  Next, the manufacturing method of the insert molded product A using the said manufacturing apparatus 1 is demonstrated.

<Installation process>
While the conductive plate B is installed in the center of the lower space 31 of the lower mold 3 of the mold 4 that has been opened, this conductive plate B is placed on the placement surface 32a of each support piece 32, and this conductive The plate B is set in the lower space 31 of the lower mold 3 and insert insertion is performed. At this time, each presser pin 24 inserted into each pin insertion hole 22 of the upper mold 2 is urged by the elastic force of the spring 27 so that the moving plate 25 contacts the upper surface 2b of the upper mold 2. The presser surfaces 24 a of the presser pins 24 protrude from the bottom 21 a of the upper mold space 21 of the upper mold 2 into the upper space 21.

<Clamping process>
In this state, the lower mold 3 and the upper mold 2 are relatively moved in the approaching direction, the molding surface 3a of the lower mold 3 and the molding surface 2a of the upper mold 2 are brought into contact with each other, and the mold is clamped. At this time, as shown in FIG. 1, the presser surfaces 24 a of the presser pins 24 projecting from the pin insertion holes 22 of the upper mold 2 into the upper mold space 21 enter the lower space 31 of the lower mold 3. The installed conductive plate B is pressed from above and sandwiched between the lower support piece 32 and positioned and fixed. Further, when the upper mold 2 and the lower mold 3 are clamped, the upper injection recess 23 of the upper mold 2 and the lower injection recess 33 of the lower mold 3 are overlapped, and the upper mold 2 and the lower mold 3 are overlapped. A resin injection port 6 for injecting the molten insulating resin C is formed in the molding space 5 between the two.

<Injection process>
Thereafter, the molten insulating resin B is injected into the resin injection port 6 of the mold 2 through the resin injection tube 51, and the insulating resin C is molded into the mold 2 as shown in FIG. Inject into the space 5. At this time, the insulating resin C fills the molding space 5 excluding the portions where the presser pins 24 and the conductive plates B are located, covers the presser pins 24 and the conductive plates B, and this molding space 5 The filling of the insulating resin C into the inside is completed.

<Pin removal process>
The insulating resin C is injected into the molding space 5 in the mold 2 and after the filling of the insulating resin C into the molding space 5 is completed, the insulating resin C is cured (from liquid to solid). In the state before the state change), that is, in the state in which the insulating resin C can be rotated and filled in the gap between the retracted presser pin 24 and the conductive plate B, as shown in FIG. The moving plate 25 is moved upward against the elastic force of the spring 27 until the pressing surface 24a of the pressing pin 24 is positioned along the bottom portion 21a of the upper mold space 21 of the upper mold 2, that is, a flush position. Each presser pin 24 is moved backward.

  At this time, the speed at which the presser pins 24 are retracted is such that the positioning of the conductive plate B by the presser pins 24 is released, and when the presser pins 24 are moved upward, the distance between the conductive plate B and the presser pin 24 is set. When the insulating resin C flows around, the conductive plate B is adjusted so as not to be displaced from a predetermined position in the molding space 5 of the mold 4.

  Here, with respect to the state before the insulating resin C is cured, the insulating resin C is filled in the entire molding space 5 of the mold 4, and this insulating property occurs when the filling of the insulating resin C is completed. As the pressure in the resin C molding space 5 and the resin injection pipe 51 rises, the insulating resin C enters the introduction pipe 53a from the connection port 52 of the resin injection pipe 51, and enters the introduction pipe 53a. When the pressure of the insulating resin C rises above a predetermined value, the switch 53 is pressurized and turned on based on the rise of the pressure of the insulating resin C, so that the moving plate is turned on when the switch 53 is turned on. A drive mechanism (not shown) that moves 25 upward is turned on and driven.

  At this time, the insulating resin C injected into the molding space 5 of the mold 4 is filled in the space where the presser pin 24 is located at the same time that the presser pin 24 moves upward and is pulled out. Then, the gap is filled between the pressing surface 24a of each pressing pin 24 and the conductive plate B. Here, since the insulating resin C is filled in the molding space 5 of the mold 2, the conductive plate B is positioned by the pressure (pressurization) by the insulating resin C in the molding space 5. The conductive plate B is positioned and held by the pressure of the insulating resin C even when the presser pins 24 are retracted.

<Removal process>
Then, in a state after the insulating resin C injected into the molding space 5 of the mold 4 is cured, the upper mold 2 is interlocked with a series of operations together with the push pin 24, the moving plate 25 and the support plate 26 to move upward. By moving, the upper mold 2 and the lower mold 3 of the mold 4 are moved relative to each other so as to be separated from each other, and the mold is opened. Remove from the molding space 5.

  As described above, the holding pin 24 attached to the pin insertion hole 22 of the upper mold 2 of the mold 4 is used, and the upper surface of the conductive plate B installed in the molding space 5 of the mold 4 is pressed and positioned and fixed. Then, the molten insulating resin C is injected into the molding space 5, and each presser pin 24 is retracted in a state before the insulating resin C is cured. After the insulating resin C is cured, the mold 4 The upper mold 2 and the lower mold 3 were opened, and the insert molded product A in which the conductive plate B was insert-molded was taken out from the molding space 5 of the mold 4.

  Therefore, when the mold 4 is clamped, the conductive plate B installed in the molding space 5 of the mold 4 is sandwiched between the support piece 32 of the lower mold 3 and the presser pin 24. The insulating resin C can be injected into the molding space 5 of the mold 4 in a state where the support piece 32 and the presser pin 24 are securely positioned and held.

  Further, after the insulating resin C is injected into the molding space 5 of the mold 4, the presser pins 24 are retracted in a state before the insulating resin C is cured (becomes solid). The insulating resin C can be rotated and filled in the gap (space) between the holding surface 24 a of each holding pin 24 and the conductive plate B, and the insulating resin C can be filled in the molding space 5 of the mold 4. Since the conductive plate B is positioned and held by the pressure of the insulating resin C in the molding space 5 when the presser pins 24 are retracted, the conductive plate B is Positioning and holding can be continued with the pressure of the insulating resin C.

  Therefore, by pressing the conductive plate B in the mold 4 with these presser pins 24, the conductive plate B can be reliably positioned and held, and the insulating resin C is applied to the portions pressed by the presser pins 24. Filling and covering can prevent the conductive plate B from being exposed by the pressing pin 24 and shield it. Therefore, the portion of the conductive plate B that is pressed by the presser pin 24 can be reliably insulated, and water droplets or dust on the portion where the conductive plate B is exposed due to the exposed portion of the conductive plate B. Can be surely prevented from entering, so that the molded product A in which the conductive plate B is insert-molded can be reliably subjected to drip-proof measures, dust-proof measures, and the like. Can be reduced.

  In particular, the timing of starting the retraction of each presser pin 24, that is, the state before the filling of the insulating resin C into the molding space 5 of the mold 4 is completed and the filled insulating resin C is cured, The insulating resin C is filled in the entire molding space 5 of the mold 4 with respect to the timing at which the insulating resin C can be passed through the gap between the retracted presser pin 24 and the conductive plate B. Focusing on the fact that the pressure of the insulating resin C in the molding space 5 rises when the filling is completed, a switch 53 is connected to the connection port 52 of the resin injection pipe 51 of the mold 4, and this mold When the pressure of the insulating resin C in the mold 4 rises above a predetermined value, the switch 53 is pressurized and pushed by the pressure of the insulating resin C, and the switch 53 is turned on. In order to interlock each presser pin 24 Turns on the drive mechanism of the moving plate 25 is driven, and the retracting the respective presser pin 24. For this reason, since it is possible to mechanically grasp and control the timing of retreating the presser pin 24 that presses and positions the conductive plate B in the mold 4, the control for retreating each presser pin 24 is a simple configuration. Can be done reliably.

  In the first embodiment, the insulating resin C is injected into the mold 2 in a state in which the conductive plate B installed in the mold 4 is pressed and positioned by the presser pin 24 and then pressed. In the state where the conductive plate B installed in the mold 4 is positioned by the presser pin 24 as in the second embodiment of the present invention shown in FIGS. A method of retracting the presser pin 24 after injecting the insulating resin C after cutting the connecting portion B1 which is the separation portion of the conductive plate B can also be employed.

  Here, the conductive plate B has a shape in which each circuit is positioned and matched and connected by a connecting portion B1, and the connecting portion B1 is cut and connected inside the mold 2. It is bent. Further, a V-shaped notch B2 for facilitating cutting / inward bending at the connecting portion B1 is formed on the back surface of the conductive plate B located on the lower surface side of the connecting portion B1. The notch B2 is formed on the back surface of the connecting portion B1 of the conductive plate B at a stage before the conductive plate B is set and set in the molding space 5 of the mold 4.

  Specifically, the manufacturing apparatus 1a used in the method of the second embodiment has substantially the same configuration as the manufacturing apparatus 1 of the first embodiment described above, and the same or corresponding members or elements are used. Are given the same reference numerals. The description thereof is omitted because it overlaps with the description in the first embodiment. In the mold 4 of the manufacturing apparatus 1a, the moving plate 25 is attached so as to face the upper surface 61a of the cavity plate 61 constituting the bottom 21a of the upper mold space 21 of the upper mold 2 of the mold 4. Each of the cavity plate 61 and the moving plate 25 is provided with pin insertion holes 61b and 25a for inserting the presser pins 24 and attaching them.

  Each presser pin 24 inserted through and attached to each of the pin insertion holes 61b and 25a communicated with each other includes a cylindrical shaft-shaped portion 24b having a pressing surface 24a formed at the tip, and the shaft-shaped portion 24b. And a disc-shaped head portion 24c attached concentrically to the base end side of the head. As shown in FIG. 5, the presser pins 24 project the heads 24c of the presser pins 24 from the upper surface of the moving plate 25, and the shaft-like portions 24b of the presser pins 24 are moved to the moving plate 25 and the cavity plate. Each of the pin insertion holes 25a and 61b of 61 is inserted in a state where the tip end portion of each presser pin 24 protrudes downward from the lower surface 61c of the cavity plate 61. Further, each presser pin 24 is fixed to the moving plate 25 in a state of being inserted into the pin insertion hole 25 a of the moving plate 25.

  The cavity plate 61 and the moving plate 25 have punch insertion holes 61d and 25b through which a punch 62 for cutting the connecting portion B1 of the conductive plate B installed in the molding space 5 of the mold 4 is inserted. It has been drilled. Further, a driving plate 63 as a moving plate for moving the punches 62 to be simultaneously moved forward and backward is attached to the outside, that is, the upper side of the support plate 26 opposite to the side where the moving plate 25 is located. Yes. A punch mounting hole 63 a is formed in the drive plate 63 at a position communicating with the punch insertion holes 61 d and 25 b of the cavity plate 61 and the moving plate 25. Further, the support plate 26 is also provided with punch insertion holes 26 a communicating with the punch mounting holes 63 a of the drive plate 63, the moving plate 25, and the punch insertion holes 25 b and 61 d of the cavity plate 61.

  Each punch 62 includes a cylindrical shaft-shaped portion 62b having a conical surface 62a formed at the tip, and a disk-shaped head 62c concentrically attached to the proximal end of the shaft-shaped portion 62b. As shown in FIG. 5, the shaft portions 62 b of the punches 62 are fixed in a state where the heads 62 c of the punches 62 are locked and fixed to the upper surface of the drive plate 63. Is inserted into the punch insertion holes 26a, 25b, 61d of the support plate 26, the moving plate 25, and the cavity plate 61 through the punch mounting holes 63a of the drive plate 63, and at least punches from the lower surface 61c of the cavity plate 61. The punch surface 62a of 62 is attached in a state of protruding downward. Further, each of the punches 62 is fixed to the drive plate 63 in a state of being inserted through the punch mounting hole 63a of the drive plate 63.

  Further, as shown in FIG. 7, the drive plate 63 is attached with a punch drive mechanism 64 which is a drive means for driving the drive plate 63 in the vertical direction to move the respective punches 62 forward and backward. Yes. On the other hand, the moving plate 25 is also provided with a pin driving mechanism 65 which is a driving means for driving the moving plate 25 in the vertical direction to move the presser pins 24 in advance and retreat. Further, a frame plate 66 as a support plate is installed outside the drive plate 63 so as to face the drive plate 63, and an elastic member is provided between the frame plate 66 and the head 62 c of each punch 62. The springs 67 are attached, and the elastic force of the springs 67 urges the punches 62 toward the punch surface 62a that is the tip side. Further, a spring 27 between the support plate 26 and the moving plate 25 is similarly attached between the support plate 26 and the head 24c of each presser pin 24, and each presser pin is moved by the elastic force of the spring 27. 24 is urged toward the pressing surface 24a. Here, the punch 62, the drive plate 63, and the punch drive mechanism 64 constitute a detachment tool 68 for severing and disconnecting the connecting portion B1 of the conductive plate B.

  Next, the manufacturing method of the insert molded product A using the said manufacturing apparatus 1a is demonstrated.

<Installation process>
First, at the stage before the conductive plate B is set in the molding space 5 of the mold 4, the notch B <b> 2 is formed on the back surface portion of the connecting portion B <b> 1 of the conductive plate B. Next, the conductive plate B is placed on the support pieces 32 so that the connecting portions B1 are positioned between the support pieces 32 of the lower mold 3 of the mold 4 that has been opened. Set in the lower space 31 of the mold 3.

  At this time, the movable plate 25 has moved to the lowest position where it abuts against the cavity plate 61, and each presser pin 24 protrudes most from the lower surface 61 c of the cavity plate 61 through the pin insertion hole 61 b of the cavity plate 61. It is in a state. Further, the drive frame 63 has moved to an uppermost position farthest from the support frame 26, and each punch 62 protrudes only from the lower surface 61 c of the cavity frame 61 through the punch insertion hole 61 d of the cavity frame 61. The retracted state is set, and is located a predetermined distance above the connecting portion B1 of the conductive plate B.

<Clamping process>
In this state, the mold 4 is clamped. At this time, as shown in FIG. 5, the conductive plate B installed in the lower space 31 of the lower mold 3 is pressed from the upper side by the pressing surface 24 a of each pressing pin 24, and the support piece 32 of the lower mold 3 is And is fixedly positioned. Also, the resin injection port 6 is formed by clamping the mold 4.

<Cutting process>
Thereafter, as shown in FIG. 6, the punch driving mechanism 64 is driven to move the driving plate 63 downward to advance each punch 62, and the punch 62 is brought into contact with the connecting portion B <b> 1 of the conductive plate B. . In this state, the drive plate 63 is further moved downward to advance each punch 62, and the connecting portions B1 of the conductive plate B are cut and inwardly bent by these punches 62 so that the connecting portions B1 are mechanically moved. The conductive plate B has a shape that is electrically separated.

  At this time, the drive plate 63 that moves each of the punches 62 is moved downward to a position where it abuts on the support plate 26, and each of the punches 62 is moved downwardly in conjunction with a predetermined position. Yes. Here, the “cutting / inward bending process” refers to lowering that cuts the connecting portion B1 of the conductive plate B and bends the cut portion B3 of the connecting portion B1 inward.

<Injection process>
In this state, the molten insulating resin C is injected from the resin injection port 6 of the mold 4, and the insulating resin C is injected into the molding space 5 of the mold 4. At this time, the insulating resin C is filled in the molding space 5 excluding the portions where the presser pins 24, the punch 62, and the conductive plate B are located.

<Pin removal process>
Then, the filling of the insulating resin C into the molding space 5 is completed, and the punch driving mechanism 64 and the pin driving mechanism 65 are in a state before the insulating resin C injected into the molding space 5 is cured. 7 are moved simultaneously, and as shown in FIG. 7, the drive plate 63 is moved upward until only the punch surface 62a of each punch 62 protrudes downward from the lower surface 61c of the cavity plate 61. The punch 62 is retracted and the moving plate 25 is moved upward to retract each presser pin 24 to a position where the presser surface 24a of each presser pin 24 is flush with the lower surface 61c of the cavity plate 61. .

  At this time, the insulating resin C in the molding space 5 of the mold 4 is pulled out by moving the presser pin 24 and the punch 62 upward, and at the same time, the presser pin 24 and the punch 62 are positioned. The space that has been filled is filled between the presser surface 24a of each presser pin 24 and the conductive plate B, and the cut portion B3 of the connecting portion B1 that has been cut and cut by internal bending and the punch surface of the punch 62. It is filled with each between 62a.

<Removal process>
Then, in a state after the insulating resin C injected into the molding space 5 of the mold 4 is cured, the mold 4 is opened, and the pressing pin 24 and the punch 62 are moved upward together with the upper mold 4. An insert molded product A in which the conductive plate B from which the connecting portion B1 has been cut off is insert molded is taken out.

  Therefore, as described above, after the mold 4 is clamped, the punch 62 is brought into contact with the connecting portion B1 of the conductive plate B, and the connecting portion B1 is cut and inwardly bent to form a cut shape. Insulating resin material C is injected into the mold 4, and the presser pin 24 and the punch 62 are retracted in a state before the stiff resin C is cured, and the presser pin 24 and the conductive plate B Insulating resin B is filled with the insulating resin B between the cut portion B3 of the connecting portion B1 and the punch 62 separated by cutting and inward bending and covered with the insulating resin C. B is insert molded. For this reason, at the time of insert molding, the connecting portion B1 of the conductive plate B can be cut off, and the cut off connecting portion B1 can be covered with the insulating resin C and shielded. Therefore, since the cutting operation | work which cut | disconnects connection part B1 of this electrically conductive plate B after insert molding can be made unnecessary, the production efficiency of the insert molded product A which insert-molded this electrically conductive plate B can be improved.

  That is, even if the insert molded product A is composed of a plurality of circuits with the conductive plate B, a single conductive plate can be obtained by using the matching conductive plate B by connecting the plurality of circuits with the connecting portion B1. Since B and one mold 4 are sufficient, manufacturing efficiency can be greatly improved. Further, since the punch 62 cuts the connecting portion B1 of the conductive plate B and bends and cuts the cut portion B3 inward so as to be bent inward, the tip end portion of the cut connecting portion B1 can be greatly displaced. . Therefore, even if a burr or the like is generated at the time of cutting the connecting portion B1, the burr or the like is broken in the middle of the large displacement of the tip of the cut portion B3. be able to.

  In particular, by retracting the presser pin 24 and the punch 62, in addition to between the retracted presser pin 24 and the conductive plate B, the connecting portion B1 and the punch 62 which are separated by cutting / inward bending are separated. Also in the middle, the insulating resin C flows around and is filled and shielded. For this reason, even if a burr or the like is formed in the connecting part B1 that has been cut and internally bent and separated, this burr is covered with the insulating resin C and shielded. Leakage, exposure, and the like associated with the formation of burrs can be reliably prevented, and pseudo contact at the disconnected connection portion B1 can be reliably prevented.

  In addition, since the presser pin 24 and the punch 62 are simultaneously retracted in a state before the insulating resin C injected into the mold 4 is cured, the punch 62 and the presser pin 24 are separated in separate steps. Compared to the case where the insert molded product A is pulled out by being retracted, the manufacturing speed when manufacturing the insert molded product A can be improved and the number of manufacturing processes can be reduced. Therefore, the manageability of the manufacturing apparatus 1a for the insert molded product A can be improved.

  Further, by moving the drive plate 63 that moves the punch 62 back and forth in the vertical direction downward to a position where it abuts on the support plate 26, each of the punches 62 reliably connects the connecting portion B 1 of the conductive plate B. It is moved in conjunction with a predetermined position where it can be cut and bent internally. For this reason, for example, the advance distance of each punch 62 can be adjusted by adjusting the attachment position of the support plate 26 and adjusting the movement distance of the drive plate 63. Adjustment of the process of cutting off the connecting portion B1 can be facilitated.

  In each of the above embodiments, the case where the conductive plate B having conductivity is used as the insert member has been described. However, the insert member used in the present invention may be a member having insulation properties. Further, as the resin material injected into the mold 4, in addition to the insulating resin material, that is, the insulating resin C, a conductive resin material or the like can be used.

  In addition, when the pressure of the insulating resin C injected into the mold 4 exceeds a predetermined value, the switch 53 is turned on to retract the presser pin 24 and the punch 62. Before the injected insulating resin C is cured, the presser pins 24 and punches 62 and the conductive plate B can be filled with the insulating resin C in a state where the insulating resin C can be rotated and filled. Since it is sufficient that the pin 24 and the punch 62 can be retracted, for example, the timing of retracting the presser pin 24 and the punch 62 can be controlled on the basis of the elapsed time from the start of the injection of the insulating resin C.

  Furthermore, in the second embodiment, the structure is such that the punch 62 is simultaneously retracted and pulled out together with the presser pin 24 in a state after the insulating resin C is injected into the mold 4. The timing for retracting the punch 62 may be shifted and controlled as separate steps. Further, the punch 62 may be moved in conjunction with the mold clamping operation of the mold 4.

  In addition, the presser pin 24 or the punch 62 and the mold 4 can be interlocked and driven by a single drive mechanism. As the drive mechanism, various drive devices such as a hydraulic motor and a servo motor can be used.

DESCRIPTION OF SYMBOLS 1,1a Manufacturing apparatus 2 Upper mold | type 2a Molding surface 2b Upper surface 3 Lower mold 3a Molding surface 4 Mold 5 Molding space 6 Resin inlet 21 Upper mold | type space 21a Bottom part 22 Pin insertion hole 23 Upper injection | pouring recessed part 24 Pressing pin 24a Holding surface 24b Shaft-shaped portion 24c Head portion 25 Moving plate 25a Pin insertion hole 25b Punch insertion hole 26 Support plate 26a Punch insertion hole 27 Spring 31 Lower mold space 31a Bottom portion 32 Support piece 32a Mounting surface 33 Lower injection recess 51 Resin injection tube 52 Connection Port 53 Switch 53a Introducing pipe 61 Cavity plate 61a Upper surface 61b Pin insertion hole 61c Lower surface 61d Punch insertion hole 62 Punch 62a Punch surface 62b Axis part 62c Head 63 Driving plate 63a Punch mounting hole 64 Punch driving mechanism 65 Pin driving mechanism 66 Frame Plate 67 Spring 68 Disconnect tool A insert molding B conductive plate (insert member)
B1 connecting part B2 notch B3 cutting point C insulating resin (resin material)

Claims (5)

An insert member is installed in a mold, and a molten resin material is injected into the mold to insert-mold the insert member.
A mold clamping step of positioning by pressing the insert member installed in the mold with a pressing pin;
An injection step of injecting the resin material into the mold;
In the mold is filled with the resin material, and a state before the resin material is cured, occurs when the filling of the resin material into the mold in has been completed, within the mold A pin removing step for starting the retraction of the presser pin by turning on the switch based on the pressure increase of the resin material ,
Taking out the insert-molded product in which the insert member is insert-molded by opening the mold in a state where the resin material is cured, and
Features and to Louis concert production method of a molded article, further comprising a. The pin removing step is characterized in that the presser pin is retracted in a state in which the resin material injected into the mold in the injection step can be passed through the clearance between the retracted presser pin and the insert member. The manufacturing method of the insert molded product of Claim 1 . 3. The press pin is retracted when the pressure of the resin material passing through the supply pipe for pouring the resin material into the mold rises above a predetermined value. Of manufacturing an insert molded product. The insert member has a shape connected by a connecting portion,
After the mold clamping step, the punch is brought into contact with the connecting portion, and includes a cutting step to form an insert member with the connecting portion cut off,
The method of manufacturing an insert-molded product according to any one of claims 1 to 3, wherein in the pinning step, the presser pin and the punch are retracted in a state before the injected resin material is cured. In the cutting step, the punch is brought into contact with the connecting portion, and the connecting portion is cut and internally bent to form an insert member having the shape in which the connecting portion is cut off,
In the pin-out process, before the injected resin material is cured, the punch is retracted together with the presser pin, and between the retracted presser pin and the insert member, and the connecting part cut and bent inwardly The method of manufacturing an insert-molded product according to claim 4, wherein the insert member is insert-molded by passing the resin material between the punches.

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