JP3079952B2 - Manufacturing method of resin molded assembly - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a resin molded assembly which is assembled by engaging a plurality of resin molded products with each other.

[0002]

2. Description of the Related Art For example, when it is intended to manufacture a resin molded assembly in which a plurality of resin molded articles are engaged with each other and assembled, each resin molded article is molded by an individual resin molding machine, and each molded article is formed. The resin molded products are collected at one place and assembled.
Such assembly is performed by an automatic machine having a parts feeder or manually.

[0003]

When a resin molded assembly is manufactured by the above-described conventional method, there are the following problems. Since resin molding and assembling are performed separately, a transport process for transporting to the assembly location, whether using an automatic machine or manually, and an assembly process at that location are required. Processes are required, and these processes are reflected in product costs. In addition, it is necessary to manage a mold for each resin molded product, which is troublesome.

[0004] The present invention has been made in view of the above problems, and an object of the present invention is to provide a method of manufacturing a resin molded assembly capable of accurately and inexpensively manufacturing a resin molded assembly.

[0005]

According to the present invention, there is provided a tree according to the present invention.
A method of manufacturing a resin molded assembly includes a housing and a housing.
U-shaped cross section that is engaged with the upper and lower surfaces of the
The resin molded assembly consisting of the
This is a method of manufacturing with a mold in which
And a movable mold, a housing mold that can slide left and right
And the top and bottom of the housing mold
With the retainer molding die
The first cam pin for driving the housing mold
To drive the retainer mold and the mounting plate
And a template to which the second cam pin is fixed.
Aside from filling the mold with molten resin, the resin is fixed
After solidifying between the mold and the movable mold, the fixed mounting plate is
Starting to separate from the plate, the bent part of the first cam pin is
Passing through the cam hole formed in the
Slide the metal mold outward to retain the housing and housing.
A space between the fixed type and the movable type.
Start opening the mold and release the second cam pin
The retainer is retained by passing through the cam holes formed in the mold.
The upper and lower surfaces of the housing are
It has a feature in that it is pressed against and engaged with.

[0006]

The method of manufacturing a resin molded assembly according to the first aspect of the present invention.
According to the method, when the molten resin is filled in the mold, the resin becomes
Solidifies between the fixed mold and the movable mold, and after solidification, removes the fixed mold.
When the attachment plate begins to separate from the template, the bent portion of the first cam pin
Passes through the cam hole formed in the housing mold,
Slide the jing mold outwards to
A space is formed between the housing and the housing.
When mold opening, in which the movable mold separates from the fixed mold, starts,
The pin passes through the cam hole formed in the retainer mold,
Slide the tena mold inside the housing,
As a result, the retainer was held by the retainer mold.
From the opening side of the U-shape to the top of the housing
It is pressed against and engaged with the lower surface. This allows you to
The retainer engages with the ring to complete the assembly. this
Later, the housing is moved from the movable type with the retainer attached.
Removed.

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

[0008]

As described above, according to the present invention, a resin is formed in a mold, and then the mold is moved to form a space between the resin mold and a pair of resin molded products. Since the molded products are engaged with each other, the assembly is also performed in the mold, so that the resin molding and the assembly process can be performed simultaneously by one machine, and a resin molded assembly having the following effects is provided. can do.

There is no need for a transport step. Compared with the case where an automatic machine is used, there is no need to supply parts using a parts feeder, and the time for the assembly process can be reduced. Compared to the case of manual assembling, it is automated and greatly shortens the time, and a separate inspection process for manual is not required. Since an individual automatic machine is not required, the work space can be reduced, and the cost for introducing the automatic machine can be reduced. As a result, a resin molded assembly can be manufactured at low cost.

Further, since the assembly is performed while the fixed mold and the movable mold are being opened, the production speed can be improved without affecting a series of resin molding cycles.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show perspective views of a resin molded assembly according to one embodiment of the present invention. Referring to FIG. 1, a resin molded assembly (connector) 10 includes a rectangular box-shaped housing 20 and a U-shaped retainer 30a which is engaged with and mounted on the upper and lower surfaces of the housing 20.
30b. The housing 20 has two rows of cylindrical terminal fitting housing chambers 21 penetrating in the front-rear direction in the upper row.
The lower row is formed in four rows, and the upper row is formed on both left and right sides, and has a lock arm 22 having flexibility in the vertical direction in the center. The rear end portion of the housing 20 from the middle in the front-rear direction is slightly smaller in outer shape than the front end, and each terminal fitting receiving chamber 21 faces upward and downward near the front end of the thinned portion. Opening 21a is formed.

Since the retainers 30a and 30b having a U-shaped cross section are mounted on the narrowed portion from the upper side and the lower side, both sides correspond to the upper side and the lower side. A total of four ridge-shaped guide rails 24 are formed. The guide rail 24 is formed obliquely so that it goes to the middle in the vertical direction toward the front end on the side surface. The cross-section of the guide rail 24 has a wedge shape having an obliquely inclined surface facing upward and a lower surface side having an obliquely inclined surface facing downward.

A small projection 25 is formed in front of the guide rail 24 on the extension thereof.
A ridge 26 is formed further inward than the small projections 4 and the small projections 25 so as to be parallel to these inclinations and project to the same width as the front end portion. Jetty 2 for the upper surface formed diagonally to each other
6 and the jetty 26 for the lower surface side are connected at the front, forming a V-shape. The retainers 30a and 30b are formed generally symmetrically as a whole, and when the U-shaped openings approach each other toward the housing 20 side, the two wing portions 31 and 31 sandwich the thinned portion of the housing 20 from both sides. It has become. A guide groove 32 is formed in the wing portion 31 at the same inclination as that of the guide rail 24 and the small protrusion 25 as a width in which the guide rail 24 and the small protrusion 25 can be inserted. The lower end of the wing portion 31 is formed obliquely along the V-shaped jetty 26.

Here, the retainers 30a, 30b are formed to be shorter than the thinned 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 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. At the front end of the movement range, the small projection 25 enters the guide groove 32.

The retainer 30a on the upper surface side and the retainer 30b on the lower surface side each have two or four protrusions 33 which can enter the opening 21a at positions on the inner surface facing the housing 20 facing the opening 21a. Have. The protrusion 33 is formed in a wedge shape that protrudes toward the front so as to be locked to a terminal fitting (not shown) inside when entering the terminal fitting accommodating chamber 21 to prevent the protrusion from coming off. As described above, the retainers 30a and 30b are slidable back and forth, and when approaching the housing 20 at the front position, the protrusion 33 enters the terminal fitting accommodating chamber 21 via the opening 21a. . If the terminal fitting is in the half-inserted state, the projection 33 comes into contact with the end face of the terminal fitting and moves to the regular insertion position. Also, wing 3
Notches 34, 34 are formed at the roots of the wings 31, 31 so that the roots of the wings 31, 31 are easily bent.

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

Next, when the retainers 30a and 30b are moved to the front ends, the projections 33 approach the housing 20 and the projections 33 are opened.
It enters the terminal fitting accommodating chamber 21 through 1a and is locked to the female terminal fitting 40 (secondary locking). The retainer 30
When a and 30b are at the rear end position, it is called a temporary lock state,
When it is at the front end position, it is called a fully locked state. On the other hand, FIG. 5 shows the movable mold 1 among the molds for manufacturing the resin molded assembly 10.
00 shows a state viewed from the front so that the slide type movement can be easily understood. A movable mold 100 shown in FIG. 1 and a fixed mold 200 located on the near side on the paper form a pair, and the movable mold 100 can be slid left and right as shown in the figure and the housing 20 can be formed on the inner surface side. And a retainer molding die (assembly slide pin) 120, 120 which slides vertically above and below the housing molding die 110, 110.

FIG. 6 shows the movable mold 100 during mold clamping.
And each state of the fixed mold 200 is shown in a cross section by changing the direction. In order to easily understand the relationship between the horizontal direction and the vertical direction, they are shown from three directions as shown in three views. That is, FIG. 6B shows a cross section in the vertical direction and FIG. 6C shows a cross section in the horizontal direction with respect to the cross section along the axial direction in FIG. The fixed mold 200 includes a mounting plate 210,
The template 220 and the punching plate 230 are configured to overlap each other, so that the mounting plate 210 and the punching plate 230 can be integrally separated from the template 220 and slidable.
The core pins 211 and the sliding pins 212 fixed to the mounting plate 210 penetrate the template 220 and are inserted into the molding space of the resin molded assembly 10. Further, first cam pins 213 and 213 for driving the housing forming dies 110 and 110 are fixed to the mounting plate 210, and second cam pins 214 for driving the retainer forming dies 120 and 120 are fixed to the template 220. , 214 are fixed, and the housing molds 110, 110 are respectively fixed.
Holes 1 formed in the retainer molds 120 and 120
11, 111 and the cam holes 121, 121. The tips of the first cam pin 213 and the second cam pin 214 are bent, and the cam holes 111 and 121 slide in a predetermined direction when the bent portions of the first cam pin 213 and the second cam pin 214 pass. It has a possible shape. As shown in FIG. 6, the first cam pins 213 and 213 and the second cam pins 214 and 214 are
The cam holes 111, 111 and the cam holes 12 are both straight portions.
1,121. And the first cam pin 21
3, 213 are bent outward, and the second cam pin 21 is bent.
4,214 are bent inward.

The movable mold 100 includes a mounting plate 130,
The template 140 and the projecting plate 150 are overlapped with each other, and the template 140 and the mounting plate 130 are fixed so as to be relatively immovable, and the projecting plate 150 is slidably held therebetween. The protruding plate 150 holds a protruding pin (not shown), 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 configuration using the mold having the above configuration will be described.

Initially, in the movable mold 100, the housing molds 110, 110 are in close contact with each other, and the retainer molds 120, 120 on both sides thereof stand by at a position where a retainer space is formed. The fixed mold 200 is in close contact with the front surface of the movable mold 100, and the core pin 211 and the sliding pin 212 are connected to the terminal fitting accommodating chamber 21.
And projecting from the inner surface of the retainers 30a and 30b. When the mold is filled with the molten resin, 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 is opened without opening the molds 20 and 140.
Starts to separate the mounting plate 210 and the leading plate 230 from the template 220.

When the mounting plate 210 starts to separate from the template 220, first, the core pin 211 and the sliding pin 212 come out of the terminal fitting accommodating chamber 21 and the inner surfaces of the retainers 30a and 30b. The sliding pin 212 is attached to the retainer 30a,
30b, the retainer 3
A space is formed in the inner part of Oa and 30b. At the same time, the first cam pins 213 and 213 also slide, and the bent portions bent outward at the tip end form the housing molds 110 and 213.
The housing forming dies 110, 110 are slid outwardly through the cam holes 111, 111 formed in the 110. This state is shown in FIG. 7 and FIG. When the housing molds 110 slide outward, a space is formed between the retainers 30a, 30b and the housing 20, as shown in FIG.

Thereafter, mold opening in which the movable mold 100 is separated from the fixed mold 200 starts. The movable mold 100 is the fixed mold 200
From the second cam pins 214, 214, the bent portions bent outward from the distal ends of the second cam pins 214, 214 form the retainer molds 120, 1
The two retainer forming dies 120, 120 are slid into the housing 20 through the cam holes 121, 121 formed in the housing 20. Here, the respective retainers 30a, 30b are pressed against the upper and lower surfaces of the housing 20 from the opening side in the U-shape while being retained by the retainer molds 120, 120. Left and right wing portions 31, 31 in each of the retainers 30a, 30b.
Approaching so as to sandwich the thinned portion of the housing 20, the end face of the wing portion 31
4, the wing portion 31 rides over the guide rail 24 due to the wedge-shaped cross-sectional shape as described above, and engages when the guide rail 24 is inserted into the guide groove 32 of the wing portion 31. Thereby, the retainers 30a and 30b engage with the housing 20, and the assembly is completed. This state is shown in FIG. 9 and FIG. After this,
When the protruding plate 150 of the movable mold 100 is slid, the housing 20 is maintained with the retainers 30a and 30b assembled.
Is removed from the movable mold 100.

In this embodiment, the housing forming dies 110 and 110 are moved by the movement of the punching plate during the mold clamping, and the retainer forming dies 120 and 120 are moved during the mold opening to perform the assembly. However, it is basically characterized in that the mold is moved during the mold opening. Therefore, the housing molds 110,
110 may also be moved. 11 to 1
3 shows a modification of the embodiment.

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

Further, the fixed mold 200 is
0, the bent portions at 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 two retainer forming dies 120,
Slide 120 inward. As a result, the retainers 30a and 30b are pressed against the upper and lower surfaces of the housing 20. This state is shown in FIG. In this example, during the opening of the fixed mold 200 and the movable mold 100, the housing molds 110 and 110 and the retainer mold 12 are opened.
By performing both the movements of 0 and 120 and performing the assembling, 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 that is paired with the movable mold 100.
With this, the housing 20 and the retainers 30a, 30b are simultaneously resin-molded, and the housing molds 110, 110 are formed.
Is moved to form a space between the housing 20 and the retainers 30a, 30b which are assembled to each other, and the housing 20 is held by the retainer molds 120, 120 while holding the respective retainers 30a, 30b from both right and left sides.
, The housing 20 and the retainers 30a, 30b are assembled. Since the part 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 to each other in accordance with the movement of the cam pins. Can also be performed. Further, the formation of the space between the resin molded products can be performed not only by the linear movement of the mold opening and the slide pin but also by two-dimensional or three-dimensional driving. Further, in the movement of the fixed mold 200 and the movable mold 100, either side may be moved to open the mold, or both may move at the same time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a disassembled state of a resin molded assembly assembled by a method of manufacturing a resin molded assembly according to one 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 the resin molded assembly showing a temporarily locked state of the retainer.

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

FIG. 5 is a schematic front view of the movable mold immediately after resin filling.

FIG. 6 is a diagram showing an internal state immediately after filling of a production mold with resin.

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

FIG. 8 is a diagram showing an internal state during the assembly of the manufacturing mold.

FIG. 9 is a schematic front view at the time of completion of assembly of the movable mold.

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

FIG. 11 is a view showing an internal state immediately after resin filling of a manufacturing mold according to a modification.

FIG. 12 is a diagram showing an internal state of the manufacturing mold during assembly.

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

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 movable mold 110 housing molding 111 cam hole 120 retainer molding 121 cam hole 130 mounting plate 140 mold plate 150 projecting plate 200 fixed die 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

Continuation of the front page (56) References JP-A-1-110918 (JP, A) JP-A-57-135133 (JP, A) JP-A-62-227614 (JP, A) JP-A-63-216718 (JP, A) , A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B29C 45/00-45/84 B29C 65/00-65/82 B29C 69/00-69/02

Claims (1)

(57) [Claims] 1. A housing, and an upper surface of the housing.
U-shaped retainer engaged with the lower surface
The movable mold and the fixed mold
Is a method of manufacturing with a set of molds, A housing mold that can slide left and right on the movable mold
And vertically above and below the housing mold.
While having a retainer mold that slides, To drive the housing mold on the fixed mold
Mounting plate on which the first cam pin is fixed, and the retainer component
Mold plate to which the second cam pin for driving the mold is fixed
And prepare for it, The mold is filled with molten resin, and the resin is
After solidifying between the movable mold, the fixed mold is mounted.
Starting to separate the plate from the template, bending the first cam pin
Part passes through a cam hole formed in the housing mold.
By sliding the housing mold outward,
Forming a space between the retainer and the housing.
And Thereafter, the mold opening where the movable mold separates from the fixed mold is opened.
First, the second cam pin is formed on the retainer mold.
The retainer by passing through the cam hole.
The upper and lower surfaces of the housing are held in the
Resin molding characterized by being pressed against and engaged with a surface
Manufacturing method of the assembly.