JP7339078B2 - Method for manufacturing resin molding - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing a resin molding.

2. Description of the Related Art Conventionally, there has been known a manufacturing method for manufacturing a resin molded body by injection molding or the like using a predetermined mold. For example, one of the conventional manufacturing methods is to place a preform at a predetermined position in a mold cavity and then inject resin into the cavity to insert the preform into a final molded product. (see, for example, Patent Document 1).

JP 2008-018633 A

In the above-described conventional manufacturing method, the preform is placed at a predetermined position in the cavity while the terminal fitting extending from the surface of the preform is inserted into the relief hole provided in the molding die. there is However, for example, when the preform is approached toward the mold for placement in the cavity, the terminal fitting may not be properly inserted into the relief hole depending on the posture of the preform, and the cavity surface around the relief hole may be damaged. There is a possibility that the terminal fittings will come into strong contact with each other. Moreover, even if the terminal fitting enters the relief hole, there is a possibility that the terminal fitting will come into strong contact with the inner surface of the relief hole. Since such contact causes deformation and wear of the terminal fitting, it is desirable to suppress it as much as possible.

This has been made in view of the above-mentioned circumstances, and the purpose is to provide a method for manufacturing a resin molded body that allows insert molding of a secondary molded body while suppressing deformation of the terminal fittings of the primary molded body, and a method of manufacturing a resin molded body. To provide a molding die for a molded body.

In order to achieve the above object, the method for producing a resin molded product according to the present invention is characterized by the following [1] to [5].
[1]
A method for manufacturing a resin molded body in which a primary molded body is insert-molded in a secondary molded body, comprising:
The primary compact is
a terminal fitting extending in a predetermined direction from the primary molded body; and a resin portion molded to hold the terminal fitting,
The manufacturing method is
By engaging the first guide structure of the resin portion of the primary molded body with the second guide structure of the molding die, the moving direction of the primary molded body with respect to the molding die is adjusted to the extension of the terminal fitting. a step of accommodating the primary molded body in a cavity of the molding die while inserting the terminal fitting into a hole of the molding die in a state of being regulated along the exit direction;
Injecting a resin into the cavity to mold the secondary molded body, and molding the resin molded body in which the primary molded body is insert-molded in the secondary molded body ,
One of the first guide structure and the second guide structure is a protrusion projecting in the extension direction of the terminal fitting, and the other of the first guide structure and the second guide structure is the extension direction. a concave portion that is recessed in and engages with the convex portion;
The projection height of the projection in the extension direction is longer than the extension length of the terminal fitting from the primary molded body in the extension direction,
A method for manufacturing a resin molding.
[2]
In the production method described in [1] above,
The resin portion of the primary molded body is
The terminal fitting has the first guide structure around a portion where the terminal fitting extends from the resin portion,
The mold is
Having the second guide structure at a position corresponding to the first guide structure,
A method for manufacturing a resin molding.
[3]
In the production method described in [2] above,
The resin portion of the primary molded body is
Having a plurality of the terminal fittings, and having the first guide structure at a position sandwiched between portions where at least two of the plurality of the terminal fittings extend from the resin portion,
The mold is
Having a plurality of the holes, and having the second guide structure at a position sandwiched between the at least two holes into which the at least two terminal fittings are to be inserted,
A method for manufacturing a resin molding.
[4]
In the production method according to any one of [1] to [3] above,
The first guide structure is the recess provided in the resin portion of the primary molded body,
The second guide structure is the convex portion that protrudes from the mold toward the primary molded body,
The movement direction of the primary molded body is regulated by the engagement between the concave portion and the convex portion.
A method for manufacturing a resin molding.
[5]
In the production method according to any one of [1] to [3] above,
The first guide structure is the convex portion that protrudes from the primary molded body toward the mold,
The second guide structure is the recess provided in the mold,
The movement direction of the primary molded body is regulated by the engagement between the concave portion and the convex portion.
A method for manufacturing a resin molding.

According to the method for manufacturing a resin molded body having the configuration [1], the primary molded body is moved by the engagement between the first guide structure of the resin portion of the primary molded body and the second guide structure of the mold. The terminal fitting of the primary molded body is inserted into the hole of the molding die while the direction is regulated. At this time, the moving direction of the primary molded body is regulated so as to follow the direction in which the terminal fitting extends from the resin portion. Therefore, the terminal fitting can be inserted into the escape hole while the terminal fitting maintains an appropriate posture with respect to the escape hole. Therefore, the manufacturing method of this configuration enables insert molding of the secondary molded body while suppressing deformation of the terminal fittings of the primary molded body.

According to the method for manufacturing a resin molded body having the configuration [2] above, the first guide structure and the second guide structure are engaged in the vicinity of the portion where the terminal fitting extends from the resin portion of the primary molded body. become. Therefore, if the primary molded body centered on the engagement point between the first guide structure and the second guide structure due to the manufacturing tolerance of the first guide structure made of resin or slight deformation at the time of engagement, Even if a slight inclination occurs, the influence of the inclination on the insertion of the terminal fitting into the hole (that is, positional deviation between the terminal fitting and the hole) is small. Therefore, the manufacturing method of this configuration enables insert molding of the secondary molded body while more appropriately suppressing deformation of the terminal fittings of the primary molded body.

Note that the above-mentioned "near" means that even if the primary molded body tilts about the engagement point as described above, the terminal fitting does not contact the cavity surface around the hole or the hole inner surface of the hole (or , the first guide structure and the portion where the terminal fitting extends from the resin portion are separated from each other by a distance such that the terminal fitting remains in a light contact that does not cause deformation of the terminal fitting.

According to the method for manufacturing a resin molded body having the configuration [3], the first guide structure and the second guide structure are arranged at positions where at least two terminal fittings extend from the resin portion of the primary molded body. will be engaged. Therefore, even if the primary molded body slightly tilts around the engaging point as described above, the tilt has little effect on the insertion of the terminal fitting into the hole. Therefore, the manufacturing method of this configuration enables insert molding of the secondary molded body while more appropriately suppressing deformation of the terminal fittings of the primary molded body.

Furthermore, since the creepage distance between the terminal fittings is lengthened by the engagement between the first guide structure and the second guide structure, the secondary formed body is formed so as to extend beyond the engagement point to an unintended range. can be suppressed. In addition, the length of the creepage distance also contributes to enhancing the waterproofness between the terminal fittings when using the resin molded body after production. Further, for example, if a concave portion is provided at the above position as the first guide structure, tilting of the terminal fitting due to molding shrinkage (so-called sink marks) that may occur during molding of the primary molded body can be suppressed.

According to the method for manufacturing a resin molded article having the configurations of [4] and [5] above, the engagement between the convex portion provided on one of the primary molded article and the mold and the concave portion provided on the other causes the primary The terminal fitting of the primary molded body is inserted into the hole of the molding die while the moving direction of the molded body is restricted. Therefore, the primary molded body can be properly arranged on the molding die by using the concave-convex fitting structure which is not overly complicated in structure and which has an excellent guiding effect.

As described above, according to the present invention, it is possible to provide a method for manufacturing a resin molded body that enables insert molding of a secondary molded body while suppressing deformation of terminal fittings of the primary molded body.

The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the detailed description below with reference to the accompanying drawings.

FIG. 1 is a perspective view of a resin molding manufactured by a manufacturing method according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA of FIG. FIG. 3 is a schematic cross-sectional view showing how a primary molded body is accommodated in a mold used for manufacturing a resin molded body. FIG. 4(a) is a schematic cross-sectional view showing how a terminal fitting extending from a primary molded body is inserted into a set hole provided in a lower mold, and FIG. 2 is an enlarged view of the part; FIG. FIG. 5 is a schematic cross-sectional view showing how the primary compact shown in FIG. 4 is accommodated in a mold. FIG. 6 is a schematic cross-sectional view showing how resin is injected into the mold through a gate hole provided in the upper mold. FIG. 7 is a schematic cross-sectional view showing how the molded resin body is removed from the molding die. FIG. 8(a) is a schematic cross-sectional view corresponding to FIG. 4(a) in the manufacturing method according to the second embodiment of the present invention, and FIG. 8(b) is an enlarged view of part C of FIG. 8(a). It is a diagram. FIG. 9 is a schematic cross-sectional view showing how the primary compact shown in FIG. 8 is accommodated in a mold. FIG. 10 is a schematic cross-sectional view corresponding to FIG. 4(a) in the manufacturing method according to the third embodiment of the present invention. FIG. 11 is a schematic cross-sectional view showing how a cover and the like are assembled to the resin molding manufactured by the manufacturing method shown in FIG.

<First embodiment>
Hereinafter, a manufacturing method according to a first embodiment of the present invention for manufacturing the resin molded body 1 will be described with reference to FIGS. 1 to 7. FIG. Hereinafter, for convenience of explanation, the side (the left side in FIGS. 1 to 7) where the mating terminals (not shown) are fitted to the hoods 22 and 23 of the resin molded body 1 is defined as the front side, and the opposite side (FIGS. 1 to 7) is defined as the front side. The right side in FIG. 7) is referred to as the rear side. 1 to 7 are referred to as upper and lower sides, respectively.

As shown in FIGS. 1, 2 and 7, the resin molded body 1 is configured such that the primary molded body 10 is insert-molded into the secondary molded body 20 . In particular, as shown in FIG. 1, in this example, two primary molded bodies 10 are insert-molded into the secondary molded body 20 in a state of being arranged side by side at positions corresponding to hood portions 22 and 23, which will be described later. .

The primary molded body 10 is a resin molded body provided with a resin portion 12 so as to cover and hold a plurality of terminal fittings 11 arranged in a predetermined array. The primary molded body 10 can be manufactured, for example, by injection molding using a plurality of molds (not shown). One end 11a of the terminal fitting 11 protrudes downward from the rear end portion 13 of the resin portion 12, and is arranged so that the respective lower end positions are aligned. The other end 11b of the terminal fitting 11 protrudes forward from the front end portion 14 of the resin portion 12, and is arranged so that the respective front end positions are aligned. The inner side surface 15 located on the lower side of the rear end portion 13 of the primary molded body 10 and the inner side surface 16 located on the rear side of the front end portion 14 are configured so that the mutual intersection angle θ is 90 degrees or more. It is A concave portion 17 into which a restricting projection 32b of a lower die 32 (to be described later) is inserted is provided in the vicinity of the portion where the terminal fitting 11 extends from the inner side surface 15 of the rear end portion 13 of the resin portion 12 . More specifically, the concave portion 17 is sandwiched between at least two of the plurality of terminal fittings 11 (two in the cross-sectional view shown in FIG. 2) extending from the rear end portion 13 of the primary molded body 10. position.

The secondary molded body 20 has a substantially rectangular case body 21 and a pair of hood portions 22 and 23 that open forward from the front surface of the case body 21 . The hoods 22 and 23 define fitting openings for receiving mating connectors (not shown). The case body 21 is open downward, and in a state in which a circuit board (see also the circuit board 42 of FIG. 11 regarding another embodiment) is assembled inside the case body 21, the circuit board and the like are installed. A cover (see also the cover 41 in FIG. 11) is assembled so as to cover it. A locking portion 24 for locking a locking projection (not shown) provided on the cover is provided on the outer peripheral surface of the case body 21 .

In particular, as shown in FIG. 2 , the inner side surface 16 of the resin portion 12 that defines the internal space of the resin molded body 1 is flush with the inner side surface 25 on the rear side of the hood portion 23 of the secondary molded body 20 . are arranged so that That is, the surface formed by connecting the inner side surface 16 of the resin portion 12 and the inner side surface 25 of the secondary molded body 20 is inclined with respect to the inner side surface 15 by an angle corresponding to the intersection angle θ described above. there is As a result, for example, when the inner surface 16 of the resin portion 12 and the inner surface 25 of the secondary molded body 20 are not arranged in a sufficiently flush state due to misalignment between the inner surface 16 of the resin portion 12 and the inner surface 25 of the secondary molded body 20, such a position is visually observed. This makes it easier to check for deviations.

As shown in FIG. 6, the resin molded body 1 in which the primary molded body 10 is insert-molded in the secondary molded body 20 is stored in the molding die 30, and the primary molded body 10 and the molding die 30 are separated. The secondary molded body 20 is formed by injecting the resin R into the molding space S defined between the cavity surface and the cavity surface.

The molding die 30 is composed of an upper die 31, a lower die 32, and a slide core 33, as shown in FIGS. The upper mold 31 and the lower mold 32 have a mold-drawing direction set in the vertical direction, and have cavity surfaces for molding the upper and lower surfaces of the resin molded body 1 . The upper mold 31 is provided with a gate hole 31 a for injecting the resin R into the mold 30 . A cavity surface 34 of the lower die 32 is provided with a set hole 32a into which one end 11a of the terminal fitting 11 can be inserted. The set hole 32 a has a shape that substantially matches the cross-sectional shape of the one end 11 a of the terminal fitting 11 . Insert molding is performed with the one end 11a of the terminal fitting 11 inserted into the set hole 32a, so that the portion of the one end 11a of the terminal fitting 11 that was inserted into the set hole 32a becomes the rear end portion of the resin molded body 1. It will protrude from the 13th face. At a position between the set holes 32a of the cavity surface 34, a restriction projection 32b projecting upward is provided.

Particularly, as shown in FIG. 4, the projection height x1 of the restricting projection 32b projecting upward from the cavity surface 34 is equal to the extension length of one end 11a of the terminal fitting 11 extending downward from the inner surface 15 of the primary molded body 10. longer than y1. Therefore, as shown in FIG. 4(a), when the primary molded body 10 is moved downward in the vertical direction and brought close to the lower mold 32, one end 11a of the terminal fitting 11 is lowered as shown in FIG. 4(b). Before starting to be inserted into the set hole 32a of the mold 32, the regulating protrusion 32b of the lower mold 32 begins to be inserted into the concave portion 17 of the primary molded body 10. As shown in FIG. As a result, the movement direction of the primary molded body 10 is restricted in the extending direction of the restricting protrusions 32b (vertical direction in FIG. 4) due to the engagement between the restricting protrusions 32b and the recesses 17. FIG. The extending direction of the restricting projection 32b is substantially the same as the extending direction of the one end 11a of the terminal fitting 11. As shown in FIG.

In other words, the one end 11a of the terminal fitting 11 is prevented from being displaced or tilted with respect to the set hole 32a of the lower die 32 by moving the primary molded body 10 downward while being guided by the restricting projection 32b. be. As a result, contact between the one end 11a of the terminal fitting 11 and the cavity surface 34 and contact between the one end 11a of the terminal fitting 11 and the inner surface of the set hole 32a can be suppressed, and deformation and wear of the terminal fitting 11 can be suppressed. .

Here, due to manufacturing tolerances of the concave portion 17 made of resin and slight deformation at the time of engagement with the restricting protrusion 32b, the primary molded body 10 centering on the engagement point between the concave portion 17 and the restricting protrusion 32b may be deformed. Slight tilting may occur. Even if such an inclination occurs, since the engagement point is in the vicinity of the terminal fitting 11 (in this example, the position where the terminal fitting 11 extends from the rear end portion 13), one end of the terminal fitting 11 does not move. The positional deviation between 11a and set hole 32a is very small. Therefore, even if such an inclination occurs, the effect on insertion of the terminal fitting 11 into the setting hole 32a is small, and the terminal fitting 11 can be properly inserted into the setting hole 32a.

The lower die 32 has a cavity surface 35 whose crossing angle with respect to the cavity surface 34 is an angle corresponding to the crossing angle θ between the inner side surface 15 of the rear end portion 13 of the resin portion 12 and the inner side surface 16 of the front end portion 14 . is provided. The cavity surface 35 faces forward. Furthermore, the lower mold 32 is provided with a recess 36 for molding a portion corresponding to the inner surface 25 of the secondary molded body 20 . As will be described later, the depression 36 defines a part of the molding space S when the molding die 30 is closed.

The slide core 33 is movable in the front-rear direction (direction perpendicular to the direction in which the upper mold 31 and the lower mold 32 are removed from the mold), and forms a cavity for molding the inner peripheral surfaces of the hood portions 22 and 23 of the secondary molded body 20. have a face. A set hole 33b for receiving the other end 11b of the terminal fitting 11 is provided in the tip surface 33a of the slide core 33. As shown in FIG.

A procedure for molding the resin molding 1 using the molding die 30 will be described below. First, one end 11a of the terminal fitting 11 is inserted into the setting hole 32a while inserting the regulating projection 32b of the lower mold 32 into the concave portion 17 of the primary molded body 10 as described above with reference to FIG. Then, the primary molded body 10 is moved until the inner side surface 15 of the primary molded body 10 comes into contact with the cavity surface 34 . At this time, as shown in FIG. 5, the inner side surface 16 is also brought into contact with the cavity surface 36 . Note that the projection height x1 of the restricting protrusion 32b is equal to or less than the hole depth of the recess 17 so that the inner side surface 15 of the rear end portion 13 and the cavity surface 34 can come into contact with each other. Thus, the primary compact 10 is arranged on the lower mold 32 . When the arrangement of the primary molded body 10 is completed, the position of the primary molded body 10 in the front-rear direction is also restricted by the engagement between the restricting projections 32b and the recesses 17. As shown in FIG. Further, when the inner side surface 15 tries to tilt away from the cavity surface 34 , such tilting is suppressed by pressing the inner side surface 16 against the cavity surface 35 . A tilt in the opposite direction is similarly suppressed.

Next, after the upper mold 31 is attached to the lower mold 32 , the slide core 33 is moved toward the front end portion 14 of the primary molded body 10 . Specifically, as shown in FIG. 5, while inserting the other end 11b of the terminal fitting 11 into the set hole 33b, the slide core 33 is slid until the front end surface 33a of the slide core 33 contacts the front end portion 14 of the primary molded body 10. As shown in FIG. Move the core 33 .

Through the above steps, the primary molded body 10 is positioned immovably in the vertical direction and the width direction, and the mold closing by the upper mold 31, the lower mold 32 and the slide core 33 is completed. As shown in FIG. 5, in this mold closed state, a molding space S is formed by the cavity surface of the upper mold 31, the cavity surface of the lower mold 32, the cavity surface of the slide core 33, and the outer surface of the primary molded body 10. ing. The recess 36 described above defines a part of the molding space S. As shown in FIG.

Next, as shown in FIG. 6 , resin R is injected into the molding space S through the gate hole 31 a of the upper mold 31 to mold the secondary molded body 20 so as to cover the outer surface of the primary molded body 10 . At this time, the primary molded body 10 receives a downward external force due to the injection pressure of the resin R injected from the gate hole 31 a and is pressed toward the lower mold 32 . The inner surface 15 is then pressed against the cavity surface 34 and the inner surface 16 is pressed against the cavity surface 35 . At this time, since the inner side surfaces 15 and 16 have the above-described crossing angle θ and are in close contact with the cavity surfaces 34 and 35, displacement such as tilting of the primary molded body 10 due to such an external force is suppressed. .

After a predetermined cooling period has passed, the mold is opened, and the resin molded body 1 in which the primary molded body 10 is insert-molded in the secondary molded body 20 is removed from the molding die 30 as shown in FIG.

<Second embodiment>
Hereinafter, a manufacturing method according to a second embodiment of the present invention for manufacturing the resin molding 1 will be described with reference to FIGS. 8 and 9. FIG. The manufacturing method according to the second embodiment differs from the first embodiment only in that the primary molded body 10 and the mold 30 having different structures for regulating the movement direction when the primary molded body 10 is placed on the lower mold 32 are used. It is different from the related manufacturing method. This difference will be mainly described below.

As shown in FIGS. 8 and 9, the primary molded body 10 according to this embodiment has projections 18 in the vicinity of portions where the terminal fittings 11 extend downward from the inner surface 15 of the rear end portion 13 . More specifically, the protrusion 18 is provided at a position where at least two (two in the cross-sectional view shown in FIG. 8) of the plurality of terminal fittings 11 are sandwiched between portions extending from the rear end portion 13. ing. Further, the lower die 32 has a concave portion 32c at a position sandwiched between the set holes 32a of the cavity surface 34. As shown in FIG. Projection height x2 of protrusion 18 projecting downward from inner surface 15 is longer than extension length y2 of one end 11a of terminal fitting 11 that also extends downward from inner surface 15 . Therefore, as shown in FIG. 8(a), when the primary molded body 10 is moved downward in the vertical direction and brought close to the lower die 32, one end 11a of the terminal fitting 11 is lowered as shown in FIG. 8(b). The projections 18 of the primary molded body 10 begin to be inserted into the recesses 32c of the lower mold 32 before being inserted into the set holes 32a of the mold 32. As shown in FIG. As a result, the movement direction of the primary molded body 10 is regulated in the extending direction of the regulating projections 32b (vertical direction in FIG. 4) due to the engagement between the projections 18 and the recesses 32c. Note that the protrusion height x2 of the protrusion 18 is equal to or less than the hole depth of the recess 32c.

In other words, as the primary molded body 10 moves downward while being guided by the projection 18, the one end 11a of the terminal fitting 11 is prevented from being displaced or tilted with respect to the set hole 32a of the lower die 32. . As a result, contact between the one end 11a of the terminal fitting 11 and the cavity surface 34 and contact between the one end 11a of the terminal fitting 11 and the inner surface of the set hole 32a can be suppressed, and deformation and wear of the terminal fitting 11 can be suppressed. . Further, as in the first embodiment, since the engagement point between the protrusion 18 and the recess 32c is near the terminal fitting 11, even if the primary molded body 10 is tilted, the terminal fitting 11 cannot be inserted into the setting hole 32a. The effect is small, and the terminal fitting 11 can be properly inserted into the set hole 32a.

As described above, according to the manufacturing method according to the first embodiment of the present invention used when manufacturing the resin molded body 1, the concave portion 17 (first guide structure) of the resin portion 12 of the primary molded body 10 and the mold The terminal metal fitting 11 of the primary molded body 10 is inserted into the concave portion 17 of the mold 30 while the moving direction of the primary molded body 10 is restricted by engagement with the restricting protrusions 32b (second guide structure) of the primary molded body 10. be done. In the second embodiment, similarly, the movement direction of the primary molded body 10 is restricted by the engagement between the projection 18 (first guide structure) and the recess 32c (second guide structure). Specifically, the moving direction of the primary molded body 10 is regulated so as to follow the direction in which the terminal fitting 11 extends from the resin portion 12 . Therefore, the terminal fitting 11 can be inserted into the setting hole 32a while the terminal fitting 11 maintains an appropriate posture with respect to the setting hole 32a. Therefore, the manufacturing method of this configuration enables insert molding of the secondary molded body 20 while suppressing deformation of the terminal fittings 11 of the primary molded body 10 .

Furthermore, in the vicinity of the portion where the terminal metal fitting 11 extends from the resin portion 12 (specifically, the position where the terminal metal fitting 11 is sandwiched between the portions where the terminal metal fitting 11 extends from the resin portion 12), the engagement between the concave portion 17 and the restricting protrusion 32b is performed. (1st Embodiment) and engagement (2nd Embodiment) of the protrusion 18 and the recessed part 32c arise. Therefore, even if the primary molded body 10 slightly tilts about the engagement point of the recessed portion 17 and the projection 18 provided in the resin portion 12 due to manufacturing tolerances, the tilted portion of the primary molded body 10 does not exceed the setting hole 32a. There is little effect on the insertion of the terminal fitting 11 into.

Furthermore, the creepage distance between the terminal fittings 11 is increased by the engagement between the recess 17 and the restricting protrusion 32b (first embodiment) and the engagement between the protrusion 18 and the recess 32c (second embodiment). Therefore, it is possible to prevent the secondary molded body 20 from being molded so as to extend into an unintended range beyond those engagement points. The length of the creepage distance also contributes to enhancing the waterproofness between the terminal fittings 11 when using the molded resin body 1 after production. For example, if the mating connector or the like is provided with projections and depressions that fit into the recess 17 (first embodiment) or the projection 18 (second embodiment), the terminal fittings 11 can be This means that the water stoppage of is increased.

Furthermore, if the concave portion 17 is provided at a position where the terminal fitting 11 is sandwiched between the portions where the terminal fitting 11 extends from the resin portion 12 as in the first embodiment, molding shrinkage ( Inclination or the like of the terminal fitting 11 due to so-called sink marks can be suppressed.

Furthermore, when the resin R is injected into the cavity of the molding die 30 , the injection pressure of the resin R presses the primary molded body 10 against the cavity surfaces 34 and 35 . As described above, the contact between the inner side surfaces 15 and 16 of the primary molded body 10 and the cavity surfaces 34 and 35 of the mold 30 suppresses displacement of the primary molded body 10 . As a result, displacement of the primary molded body 10 due to the injection pressure of the resin R is suppressed. Therefore, the displacement of the primary molded body 10 can be suppressed more appropriately.

Furthermore, the primary molded body 10 and the primary molded body 10 are engaged with the convex portion (regulating protrusion 32b or projection 18) provided on one of the molds and the recessed portion (recessed portion 17 or recessed portion 32c) provided on the other. The terminal fitting 11 of the primary molded body 10 is inserted into the set hole 32a of the mold 30 while the movement direction is restricted. Therefore, the primary molded body 10 can be properly arranged on the mold 30 by using a concave-convex fitting structure that is not overly complicated in structure and has an excellent guiding effect.

It should be noted that the present invention is not limited to the above-described embodiments, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, number, location, etc. of each component in the above-described embodiment are arbitrary and not limited as long as the present invention can be achieved.

For example, as shown in FIG. 10, the rear end portion 13 of the primary molded body 10 is provided with a recess 17, and the lower mold 32 is provided with a restricting protrusion 32b. The protrusion 19 may be provided so as to protrude toward the lower die 32, and the concave portion 32d for receiving the protrusion 19 may be provided at a position different from that of the restricting protrusion 32b of the lower mold 32. A projection 19 extends downwardly from the inner surface 15 of the rear end 13 . As in the second embodiment, the projection 19 projecting downward from the inner surface 15 has a projection height greater than the extension length of the one end 11a of the terminal fitting 11 extending downward from the inner surface 15 . Therefore, the moving direction of the primary molded body 10 is regulated in the extending direction of the projection 19 (vertical direction in FIG. 10) by the guiding effect of the engagement between the projection 19 and the recess 32d.

Furthermore, when the projection 19 has a plate-like shape extending in the depth direction of the paper surface of FIG. 10, as shown in FIG. Even if the adhesive 43 for adhering the secondary molded body 20 to the secondary molded body 20 flows out toward the terminal fitting 11 , the adhesive 43 can be blocked by the protrusion 19 .

Here, the features of the manufacturing method and the embodiment of the mold according to the present invention described above are summarized and listed briefly in [1] to [5] below.
[1]
A method for manufacturing a resin molded body (1) in which a primary molded body (10) is insert-molded in a secondary molded body (20), comprising:
The primary compact (10) is
a terminal fitting (11) extending in a predetermined direction from the primary molded body (10); and a resin portion (12) molded to hold the terminal fitting (11),
The manufacturing method is
The first guide structures (17, 18, 19) of the resin portion (12) of the primary molded body (10) and the second guide structures (32b, 32c, 32d) of the mold (30) are By engaging the terminal fitting (11), the terminal fitting (11) is held in a state in which the direction of movement of the primary molded body (10) with respect to the molding die (30) is regulated along the extension direction of the terminal fitting. a step of accommodating the primary compact (10) in the cavity of the mold (30) while inserting it into the hole (32a) of the mold (30);
The resin molded body obtained by injecting the resin (R) into the cavity to mold the secondary molded body (20) and insert-molding the primary molded body (10) into the secondary molded body (20). A step of molding (1);
A method for producing a resin molding (1).
[2]
In the production method described in [1] above,
The resin portion (12) of the primary molded body (10) is
The terminal fitting (11) has the first guide structure (17, 18, 19) in the vicinity of the portion where the terminal fitting (11) extends from the resin portion (12),
The mold (30) is
Having the second guide structures (32b, 32c, 32d) at positions corresponding to the first guide structures (17, 18, 19),
A method for producing a resin molding (1).
[3]
In the production method described in [2] above,
The resin portion (12) of the primary molded body (10) is
Having a plurality of terminal fittings (11), the first guide structure ( 17, 18),
The mold (30) is
The second guide structure ( 32b, 32c),
A method for producing a resin molding (1).
[4]
In the production method according to any one of [1] to [3] above,
The first guide structure is a concave portion (17) provided in the resin portion (12) of the primary molded body (10),
The second guide structure is a projection (32b) projecting from the mold (30) toward the primary molded body (10),
The movement direction of the primary molded body (10) is restricted by the engagement between the concave portion and the convex portion.
A method for producing a resin molding (1).
[5]
In the production method according to any one of [1] to [3] above,
The first guide structure is convex portions (18, 19) projecting from the primary compact (10) toward the mold (30),
The second guide structure is recesses (32c, 32d) provided in the mold (30),
The movement direction of the primary molded body (10) is restricted by the engagement between the concave portion and the convex portion.
A method for producing a resin molding (1).

REFERENCE SIGNS LIST 1 resin molded body 10 primary molded body 11 terminal fitting 12 resin portion 17 concave portion (first guide structure)
20 Secondary compact 30 Mold 32a Set hole (hole)
32b regulation projection (second guide structure)

Claims (5)

A method for manufacturing a resin molded body in which a primary molded body is insert-molded in a secondary molded body, comprising:
The primary compact is
a terminal fitting extending in a predetermined direction from the primary molded body; and a resin portion molded to hold the terminal fitting,
The manufacturing method is
By engaging the first guide structure of the resin portion of the primary molded body with the second guide structure of the molding die, the moving direction of the primary molded body with respect to the molding die is adjusted to the extension of the terminal fitting. a step of accommodating the primary molded body in a cavity of the molding die while inserting the terminal fitting into a hole of the molding die in a state of being regulated along the exit direction;
Injecting a resin into the cavity to mold the secondary molded body, and molding the resin molded body in which the primary molded body is insert-molded in the secondary molded body ,
One of the first guide structure and the second guide structure is a protrusion projecting in the extension direction of the terminal fitting, and the other of the first guide structure and the second guide structure is the extension direction. a concave portion that is recessed in and engages with the convex portion;
The projection height of the projection in the extension direction is longer than the extension length of the terminal fitting in the extension direction from the primary molded body,
A method for producing a resin molding. In the manufacturing method according to claim 1,
The resin portion of the primary molded body is
The terminal fitting has the first guide structure around a portion where the terminal fitting extends from the resin portion,
The mold is
Having the second guide structure at a position corresponding to the first guide structure,
A method for producing a resin molding. In the manufacturing method according to claim 2,
The resin portion of the primary molded body is
Having a plurality of terminal fittings, and having the first guide structure at a position where at least two of the plurality of terminal fittings extend from the resin portion,
The mold is
Having a plurality of the holes, and having the second guide structure at a position sandwiched between the at least two holes into which the at least two terminal fittings are to be inserted,
A method for producing a resin molding. In the manufacturing method according to any one of claims 1 to 3,
The first guide structure is the recess provided in the resin portion of the primary molded body,
The second guide structure is the convex portion that protrudes from the mold toward the primary molded body,
The movement direction of the primary molded body is regulated by the engagement between the concave portion and the convex portion.
A method for producing a resin molding. In the manufacturing method according to any one of claims 1 to 3,
The first guide structure is the convex portion that protrudes from the primary molded body toward the mold,
The second guide structure is the recess provided in the mold,
The movement direction of the primary molded body is regulated by the engagement between the concave portion and the convex portion.
A method for producing a resin molding.

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