JPH08323795A - Mold for producing resin molded assembly - Google Patents

Abstract

PURPOSE: To inexpensively and accurately produce a resin molded assembly by moving molds after a resin is molded in the molds to form a space between the resin molded products and moving the molds to mutually engage the resin molded products. CONSTITUTION: A housing 20 and a retainer are simultaneously molded from a resin by a movable mold 100 consisting of slidable housing molds 110, 110 and retainer molds 120, 120 and the fixed mold 200 forming a pair along with the mold 100. The housing molds 110, 110 are moved to form a space between the mutually assembled housing 20 and retainer. The retainer is pressed to the housing 20 while held on both left and right sides thereof by the retainer molds 120, 120 to assemble the housing 20 and the retainer. Since the molds are moved by utilizing a mold clamping process, an assembling speed can be also increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing die for manufacturing a resin molding assembly by engaging a plurality of resin moldings with each other to assemble them.

[0002]

2. Description of the Related Art For example, in the case of manufacturing a resin molding assembly in which a plurality of resin moldings are engaged with each other and assembled, each resin molding is molded by an individual resin molding machine, and each molded resin is molded. Assemble resin molded products in one place.
Such assembling is performed by an automatic machine equipped with a parts feeder or manually.

[0003]

When the resin molded assembly is manufactured by the conventional method as described above, there are the following problems. Since resin molding and assembly are performed separately, a transfer process to transfer to the assembly place, whether using an automatic machine or manually, and an assembly process at that place are required. Processes are required, and these processes are reflected in the product cost. Further, it is troublesome because it is necessary to manage the mold for each resin molded product.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a mold for producing a resin-molded assembly, which is capable of inexpensively and accurately manufacturing the resin-molded assembly.

[0005]

In order to achieve the above-mentioned object, the invention according to claim 1 is a resin-molded assembly which is assembled by engaging a plurality of resin-molded products with each other. While molding multiple resin molded products, move the mold between one resin molded product and another resin molded product to open a space between the fixed mold and the movable mold to form a space. While holding the product, the mold is moved to press the other resin molded product against the one resin molded product for engaging assembly.

[0006]

In the invention according to claim 1 configured as described above, in molding a plurality of resin molded products in one mold, a mold between one resin molded product and another resin molded product is formed. Move to form a space. That is, the opposing surface of the opposite resin molded product is molded by the mold before the space is formed by the movement of the mold, and the space is formed by moving the mold. Thereafter, while holding one resin molded product, the other resin molded product is moved within the same space, and the two are pressed against each other to be engaged with each other to assemble.

Here, since the mold is moved to form the space and the assembly is performed during the opening of the fixed mold and the movable mold, which are the main body, the assembly is carried out in the course of a series of resin molding cycles. Yes, the cycle time is short.

[0008]

As described above, according to the present invention, after the resin is molded in the mold, the mold is moved to form a space between the resin molded product and the pair, and the mold is moved to move the resin. Since the molded products are made to engage with each other, they can be assembled in the mold, and the resin molding and assembly processes can be performed simultaneously by one machine, providing a resin molded assembly with the following effects can do.

A transfer process is unnecessary. Compared to the case where an automatic machine is used, it is not necessary to supply the parts with the parts feeder, and the assembly process time can be shortened. Compared with the case of assembling by hand, it is automated and the time is significantly reduced, and a separate inspection process for human is not required. Since each automatic machine is not required, the work place can be reduced and the cost for introducing the automatic machine can be reduced. And as a result of these, a resin-molded assembly can be manufactured at low cost.

Further, since the assembly is performed during the mold opening of the fixed mold and the movable mold, the manufacturing speed can be improved without affecting the series of resin molding cycles.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are perspective views showing a resin molding assembly according to an embodiment of the present invention. In FIG. 1, the resin molded assembly (connector) 10 includes a rectangular box-shaped housing 20 and a retainer 30a having a U-shaped cross section, which is engaged and attached to the upper surface and the lower surface of the housing 20.
And 30b. The housing 20 has a cylindrical terminal fitting housing chamber 21 penetrating in the front-rear direction in two rows in the upper stage,
The lower row is formed in four rows, the upper row is formed on both left and right sides, and a lock arm 22 having vertical flexibility is provided at the center. The outer shape of the rear end side portion of the housing 20 is slightly smaller than that of the front end from the middle of the front-rear direction, and each terminal fitting housing chamber 21 faces upward and downward in the vicinity of the front end of the narrowed portion. The opening 21a is formed.

Since the retainers 30a, 30b having a U-shaped cross section are attached to the narrowed portion from the upper surface side and the lower surface side, both side surfaces correspond to the upper surface side and the lower surface side, respectively. A total of four ridge-shaped guide rails 24 are formed. The guide rail 24 is formed obliquely on the side surface so as to face the middle of the vertical direction as it goes to the front end. The cross section of the guide rail 24 is wedge-shaped with the upper surface side having an oblique inclined surface facing upward and the lower surface side having a diagonal inclined surface facing downward.

A small protrusion 25 is formed on the front side of the extension line of the guide rail 24.
4 and a small protrusion 25, a jetty 26 that is parallel to these inclinations and projects to the same width as the front end portion is formed further inside. Jetty 2 for the upper surface side formed diagonally to each other
6 and the jetty 26 for the lower surface side are connected to each other at the front to form a V-shape. The retainers 30a and 30b are formed to be substantially symmetrical as a whole, and when the U-shaped openings are brought close to each other toward the housing 20 side, the wing portions 31 and 31 sandwich the narrowed portion of the housing 20 from both sides. It has become. A guide groove 32 is formed in the wing portion 31 so as to have a width into which the guide rail 24 and the small protrusion 25 can be inserted, with an inclination similar to these. The lower end of the wing portion 31 is formed obliquely along the V-shaped jetty 26.

Here, the retainers 30a and 30b are formed shorter than the narrowed portion of the housing 20. Therefore, when the retainers 30a and 30b are mounted so as to sandwich the housing 20 from the upper surface side and the lower surface side, the guide rail 24 can enter the guide groove 32 and can slide back and forth, and both are formed obliquely. Therefore, the retainers 30a and 30b move toward and away from the housing 20 while moving back and forth. Then, at the front end of the movement range, the small protrusion 25 is adapted to enter the guide groove 32.

Further, the upper surface retainer 30a and the lower surface side retainer 30b each have two and four protrusions 33 which can enter the opening 21a at positions facing the opening 21a on the inner surface facing the housing 20. I have it. The projection 33 is formed in a wedge shape protruding toward the front so as to be locked to a terminal metal fitting (not shown) inside and prevent the metal fitting from coming off when entering the terminal metal housing chamber 21. As described above, the retainers 30a and 30b are slidable back and forth, and when the retainer 30a, 30b approaches the housing 20 at the front position, the protrusion 33 enters the terminal fitting housing chamber 21 through the opening 21a. . If the terminal fitting is in the half-inserted state, the projection 33 contacts the end surface of the terminal fitting and moves it to the proper insertion position. Also, the wings 3
Notches 34 and 34 are formed in the root portions of the blades 1 and 31, so that the root portions of the blade portions 31 and 31 are easily bent.

FIGS. 3 and 4 show such retainers 30a, 3a.
The state of double locking by 0b is shown by a sectional view.
An integrally molded resin lance 27 is formed on the bottom surface of each terminal fitting housing chamber 21 in the housing 20, and when the female terminal fitting 40 is inserted, the protrusion 27a formed on the upper surface of the resin lance 27 has a protrusion 27a formed on the same. The metal fitting 40 is inserted into a locking hole (not shown) formed on the bottom surface of the metal fitting 40 and locked (primary locking). At this time, the retainers 30 a and 30 b are located at the rear ends in the moving range, and the protrusion 33 is not in the terminal fitting housing chamber 21.

Next, when the retainers 30a and 30b are moved to the front ends, the retainers 30a and 30b approach the housing 20 and the protrusion 33 opens the opening 2.
It enters into the terminal metal fitting accommodating chamber 21 through 1a and is locked to the female terminal metal fitting 40 (secondary locking). In addition, retainer 30
When a and 30b are at the rear end position, it is called a temporary locking state,
When it is in the front end position, it is called a fully locked state. On the other hand, FIG. 5 shows the movable mold 1 of the molds for manufacturing the resin molding assembly 10.
00 is viewed from the front so that the movement of the slide type can be easily understood. The movable die 100 shown in the figure and a fixed die 200 located on the front side of the drawing are a set, and the movable die 100 can slide left and right as shown in the figure, and the housing 20 can be formed on the inner surface side. The housing forming dies (slide pins) 110 and 110, and the retainer forming dies (assembly slide pins) 120 and 120 that vertically slide above and below the housing forming dies 110 and 110.

On the other hand, FIG. 6 shows the movable mold 100 during mold clamping.
Each situation of the fixed mold 200 and the fixed mold 200 is shown in cross section by changing the direction. For easy understanding of the relationship between the horizontal direction and the vertical direction, they are expressed from three directions as shown in the three-view drawing. That is, FIG. 6B shows a vertical section and FIG. 6C shows a horizontal section with respect to the section taken along the axial direction of FIG. 6A. The fixed die 200 includes a mounting plate 210,
The mold plate 220 and the punched plate 230 are superposed on each other, and the mounting plate 210 and the punched plate 230 are integrated with each other so that they can slide separately from the mold plate 220.
The core pin 211 and the sliding pin 212 fixed to the mounting plate 210 penetrate the mold plate 220 and are inserted into the molding space of the resin molding assembly 10. Further, first cam pins 213 and 213 for driving the housing molding dies 110 and 110 are fixed to the mounting plate 210, and second cam pins 214 for driving the retainer molding dies 120 and 120 are fixed to the molding plate 220. , 214 are fixed, and the housing molding dies 110, 110 are respectively provided.
And cam hole 1 formed in retainer mold 120, 120
11, 111 and the cam holes 121, 121 have entered. The tips of the first cam pin 213 and the second cam pin 214 are bent, and the cam hole 111 and the cam hole 121 are slidably driven in a predetermined direction when the tip bent portions of the first cam pin 213 and the second cam pin 214 pass through. It has a possible shape. As shown in FIG. 6, during mold clamping, the first cam pins 213 and 213 and the second cam pins 214 and 214 are
Both are straight portions of the cam holes 111, 111 and the cam hole 12.
It penetrates 1,121. Then, the first cam pin 21
The tips of 3, 213 are bent outward, and the second cam pin 21
4, 214 are bent inward.

The movable die 100 has a mounting plate 130 and
The mold plate 140 and the protruding plate 150 are overlapped with each other, and the mold plate 140 and the mounting plate 130 are relatively immovably fixed, and the protruding plate 150 is slidably held between them. A protrusion pin (not shown) is held on the protrusion plate 150, and is used when the molded resin molded product is removed from the mold. Next, a method of manufacturing the resin-molded assembly 10 having the above-mentioned configuration using the mold having the above-mentioned configuration will be described.

Initially, in the movable mold 100, the housing molds 110, 110 are closely contacted to each other, and the retainer molds 120, 120 on both sides of the housing molds 120 stand by at positions forming a retainer space. Further, the fixed die 200 is in close contact with the front surface of the movable die 100, and the core pin 211 and the sliding pin 212 are connected to the terminal fitting housing chamber 21.
And the inside of the retainers 30a and 30b are projected. When the molten resin is filled in the mold, the resin is solidified between the fixed mold 200 and the movable mold 100. After solidification, the template 2 of the fixed mold 200 and the movable mold 100
The fixed mold 200 without opening the mold 20 and 140
Then, the attachment plate 210 and the punched plate 230 of 1 are started to be separated from the template 220.

When the mounting plate 210 begins to separate from the mold plate 220, first, the core pin 211 and the sliding pin 212 come out from the inside of the terminal fitting housing chamber 21 and the inner surface portions of the retainers 30a and 30b. The sliding pin 212 is the retainer 30a,
By coming out from the inner surface of 30b, the retainer 3
Spaces are formed in the inner portions of 0a and 30b. At the same time, the first cam pins 213 and 213 also slide, and the bent portion that bends to the outside of the tip is the housing molding die 110,
Both housing molding dies 110, 110 are slid outwardly through the cam holes 111, 111 formed in 110. This state is shown in FIGS. 7 and 8. As the housing molds 110, 110 slide outward, a space is formed between the retainers 30a, 30b and the housing 20 as shown in FIG.

After this, the mold opening to separate the movable mold 100 from the fixed mold 200 starts. The movable mold 100 is the fixed mold 200
When it starts to separate from the retainer molding die 120, 1
After passing through the cam holes 121, 121 formed in 20, the retainer molds 120, 120 are slid inward with the housing 20. Here, the retainers 30a and 30b are pressed against the upper surface and the lower surface of the housing 20 from the opening side in the U-shape while being retained by the retainer molds 120 and 120. Left and right wing portions 31, 31 of each retainer 30a, 30b
As they are brought closer to each other so as to sandwich the narrowed portion of the housing 20, the end surface of the wing portion 31 is guided by the guide rail 2
However, as described above, the wing portion 31 rides over the guide rail 24 due to the wedge-shaped cross-sectional shape, and engages when the guide rail 24 is inserted into the guide groove 32 of the wing portion 31. As a result, the retainers 30a and 30b engage with the housing 20 and the assembly is completed. This state is shown in FIGS. 9 and 10. After this,
When the protruding plate 150 of the movable mold 100 is slid, the housing 20 is kept assembled with the retainers 30a and 30b.
Is removed from the movable mold 100.

In the present embodiment, the housing forming dies 110, 110 are moved by moving the leading plate during mold clamping, and the retainer forming dies 120, 120 are moved during mold opening so that the assembling is performed. However, it is basically characterized in that the mold is moved during opening of the mold. Therefore, during mold opening, the housing mold 110,
The 110 may also be moved. 11 to 1
Reference numeral 3 shows a modification of the embodiment.

In the present embodiment, the fixed die 200 is not provided with the punching plate 230, and although not shown,
The core pin 211 and the sliding pin 212 are integrally fixed to the template 220. FIG. 11 shows the mold clamping state,
From this state, the mold opening between the fixed mold 200 and the movable mold 100 is started. When the mold plate 220 of the fixed mold 200 starts to separate from the mold plate 140 of the movable mold 100, the core pin 211 and the sliding pin 212 move inside the terminal fitting housing chamber 21 and the retainer 30a.
Get out of the inner surface of 30b. Next, the bent portions of the tips of the first cam pins 213, 213 pass through the cam holes 111, 111 formed in the housing molding dies 110, 110, and the both housing molding dies 110, 110 are slid outward. This state is shown in FIG.

Further, the fixed die 200 is the movable die 10
When it is separated from 0, the bent portions of the tips of the second cam pins 214, 214 pass through the cam holes 121, 121 formed in the retainer forming dies 120, 120, and the retainer forming dies 120,
Slide 120 inward. As a result, the retainers 30a and 30b are pressed against the upper surface and the lower surface of the housing 20. This state is shown in FIG. In this example, the housing molds 110 and 110 and the retainer mold 12 are opened during the mold opening of the fixed mold 200 and the movable mold 100.
By moving both 0 and 120 for assembly, the production speed of the product can be further improved.

As described above, the movable mold 100 including the slidable housing molds 110 and 110 and the retainer molds 120 and 120, and the fixed mold 200 paired with the movable mold 100.
The housing 20 and the retainers 30a and 30b are simultaneously resin-molded by using
While forming a space between the housing 20 and the retainers 30a, 30b which are moved together to be assembled with each other, the housing 20 is held while the retainer molding dies 120, 120 hold the respective retainers 30a, 30b from both left and right sides.
The housing 20 and the retainers 30a and 30b are assembled by pressing the housing 20 toward the. Since the one is moved using the mold clamping process, the assembling speed can be improved.

In the above-described embodiment, the housing mold 110 and the retainer mold 120 are mechanically connected together with the movement of the cam pins. However, hydraulic or pneumatic driving or a motor is used. It can also be performed by driving. The space between the resin molded products can be formed not only by the mold opening and the linear movement of the slide pin, but also by two-dimensional or three-dimensional driving. Further, in moving the fixed die 200 and the movable die 100, either side may move to open the die, or both sides may move simultaneously.

[Brief description of drawings]

FIG. 1 is a perspective view in a disassembled state of a resin molded assembly that is assembled by a mold for manufacturing a resin molded assembly according to an embodiment of the present invention.

FIG. 2 is a perspective view of the resin molded assembly in an assembled state.

FIG. 3 is a cross-sectional view of a resin molded assembly showing a retainer in a temporarily locked state.

FIG. 4 is a cross-sectional view of the resin molded assembly showing the retainer in the fully locked state.

FIG. 5 is a schematic front view immediately after the movable resin is filled.

FIG. 6 is a diagram showing an internal condition of a manufacturing die immediately after filling with resin.

FIG. 7 is a schematic front view of the movable die during assembly.

FIG. 8 is a diagram showing an internal state in the process of assembling a manufacturing die.

FIG. 9 is a schematic front view of the movable die when assembly is completed.

FIG. 10 is a diagram showing an internal state at the time of completion of assembly of a manufacturing die.

FIG. 11 is a diagram showing an internal state of a manufacturing die according to a modified example immediately after resin filling.

FIG. 12 is a view showing an internal state during the assembling of the manufacturing die.

FIG. 13 is a diagram showing an internal state at the time of completion of assembly of the manufacturing die.

[Explanation of symbols]

 100 ... Movable mold 110 ... Housing molding mold 111 ... Cam hole 120 ... Retainer molding mold 121 ... Cam hole 130 ... Mounting plate 140 ... Mold plate 150 ... Ejection plate 200 ... Fixed mold 210 ... Mounting plate 211 ... Core pin 212 ... Sliding pin 213 ... First cam pin 214 ... Second cam pin 10 ... Resin molded assembly 20 ... Housing 30a, 30b ... Retainer

Claims (1)

[Claims] 1. A resin molding assembly that is assembled by engaging a plurality of resin moldings with each other, wherein a plurality of resin moldings are molded in a mold, and a fixed mold and a movable mold are opened. To move a mold between one resin molded product and another resin molded product to form a space, and move the mold while holding one resin molded product to move the other resin molded product to the above-mentioned one. A mold for manufacturing a resin-molded assembly, which is characterized in that the resin-molded article is pressed against the resin-molded article for assembly.