JPH0256881A - Molding method of female connector - Google Patents

Abstract

PURPOSE:To automatically mold many female connectors at a high speed by fitting or removing only a molding auxiliary frame to a molding die for molding. CONSTITUTION:A work is fitted or removed from a molding auxiliary frame 1 provided with a plug blade-shaped member 15 inserted into the work and the holding section of a power source cord 6, and the molding auxiliary frame 1 itself is fitted or removed from a molding die. The work can be fitted or removed outside the molding die, thereby these operations can be performed independently from the molding cycle, moreover the molding auxiliary frame fitted with the work is fitted to the molding die, thus no trouble occurs on the automated mass production. Female connectors can be safely molded at a high speed.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a method for molding a female connector into which the blade of a power plug is inserted, that is, a female connector in which the blade hole of a power strip, cord connector, etc. is opened.

[Conventional technology]

In this type of female connector, the blade holder and power cord to be connected to the blade are attached to the primary molded container body.1. After that, some vessels have a covering made of thermoplastic synthetic resin and a cord bushing molded onto the outer surface of the vessel. For such female connectors, it is necessary to prevent the molding resin from entering the interior through the plug hole where the plug blade is inserted during molding, but there is a possibility that the molded resin will not enter the inside through the plug hole where the plug blade is inserted. Female connectors such as taps cannot be handled with just the upper and lower types, and the blade holder also requires a slide core with a blade-like protrusion that can be inserted into the part. Conventionally, this slide core is attached to the lower mold, the workpiece is manually set on the lower mold, and then the slide core is moved by the upper mold when the mold is closed, and injection is performed with the slide core in close contact with the workpiece. After molding, the molded product was removed manually.

[Problem to be solved by the invention]

In this case, it is necessary to put your hands into the mold and touch the hot workpieces, which is dangerous. In addition, manual setting and removal inevitably lengthens the molding cycle, and there is a risk of mold damage due to unreliable setting of the workpieces. There is a risk. Another problem is that the stroke of the slide core must be large. Furthermore, even if we try to automate the process by using a chuck, the presence of power cords makes it difficult not only when taking out the items but also when setting them up. The present invention has been made in view of these points, and its purpose is to provide a method for molding a female connector that can automate the molding of the female connector and speed up the molding process by using multiple sides. There is something to do.

[Means to solve the problem]

Therefore, the present invention provides a molding auxiliary frame that includes a slide core equipped with a plug blade-like member that is inserted into the workpiece, and a holding member for a power cord led out from the workpiece, and a molding auxiliary frame that is provided with a plug blade-like member that is inserted into the workpiece. The workpiece is mounted by holding the power cord with the holding member, and then the molding auxiliary frame is placed between the upper and lower molds, the slide core is brought into contact with the workpiece surface when the upper and lower molds are clamped, and the molding auxiliary frame is placed after molding. The feature is that the workpiece can be taken out completely. [Function] According to the present invention, in order to set and remove the work to the molding auxiliary frame, these operations can be performed outside the mold, and molding can be performed simply by attaching and detaching the molding auxiliary frame to and from the mold. can be done. [Example] The present invention will be described below in detail based on the illustrated device. This is a power plug 5 in a wiring cord in which a power plug 5 is provided at one end of the power cord 6 and a power strip 4 is provided at the other end.
and a table tap 4 for forming a secondary molded body made of thermoplastic resin, and FIGS. 1 to 10 show a molding auxiliary frame 1 used in molding the secondary molded body. ing. This rectangular shaped auxiliary frame 1 has a power plug 5.
Primary molded body 51 and primary molded body 4 of table tap 4
1 is set in pairs, and includes a rectangular frame 10 in which grooves 10a and 10b are formed on a pair of parallel sides, and one side on which a ridge 10a is provided. It consists of a cover piece 11 placed on the side and a plurality of cover pieces 18 placed on the side where the arm 10b is provided, and a pair of cam plates 12 and 13 are placed in the groove 10a in the longitudinal direction of this side. A cord clamp fitting 17 is slidably housed in the groove 10b. Further, a pair of slide cores 14, 14 are attached to the cover piece 11 and are slidable in a direction perpendicular to the longitudinal direction of the cover piece 11. And these slide cores 14.
Each of the members 14 is attached with a blade-like member 15 which is further slidable with respect to the slide core 14 and has a blade-like projection 15a at one end. The cam plate 12.
Reference numeral 13 is for sliding each plug blade-like member 15, and includes cam grooves 12a and 13a, respectively, in which a pin 15b protruding from the plug blade-like member 15 is slidably engaged.
The groove 12a in which the pin 1.5b engages when the cam play) 12.13 is slidably driven. Due to the inclination of 13a, the plug blade-like member 15 slides with respect to the forming auxiliary frame 1 and the slide core 14. In addition, the slide core 14 has one end surface exposed to the outer surface of the auxiliary molding frame 1 that forms an inclined surface 1, as is clear from FIG.
4c, and is biased in one direction by a return spring 14b disposed within the forming auxiliary frame 1. The slide core 14 slides against the return spring 14c as a cam 24 in the mold 2, which will be described later, presses the inclined cylinder 14c. A pair of sliders 16, 16 are further attached to the cover piece 11 and are slidable in the longitudinal direction thereof. These sliders 16.16 have a slide core in the groove 11c formed on the lower surface side of the cover piece 11.
It is equipped with engagement pins 16a that engage with holes provided in the plug blade 5-5 of the power plug 5 that is inserted into the insertion groove 11e formed in the cover piece 11, and these engagement pins 16a are is biased by the car that engages with the plug blade 55. In addition, the ground of these sliders 16.16 is the inclined surface 16.
c, 16c, and a slider 16.1 in which a cam 85.85 is located in the arm 11c from the opening 11d on the upper surface communicating with the groove 11c in the cover piece 11 and the lid.
When each inclined surface 16c of 6 is pressed, the slider 16 retreats against the spring 16b, and the engagement pin 16a is disengaged from the stopper blade 55. The slidable cord clamp fitting 17 in the molded holding frame 1 has a key-shaped protrusion 17a, and is attached to the cover piece 1.
The power cord 6 passed through the cord insertion groove formed as a gap between the power cords 8 and 8 is clamped by the protrusion 17a. Molding using the above-mentioned molding auxiliary frame 1 is shown in Fig. 11 and 1.
As shown in Figure 2, a code block crimping device 7 is installed at the front stage.
This is carried out by a molding device 8 which is provided with a characteristic testing device 9 at a subsequent stage. The code block crimping device 7 here is a palletizer 71 that supplies the primary formed body 41 of the table tap 4.
and 9, and a palletizer 72 that supplies the primary molded body 51 of the power plug 5.A strip section for removing the coating from both ends of the power cord 6 to be set is supplied from the palletizer 71. The caulking part fixes one end of the power cord 6 by caulking to the connection terminal part of the primary molded body 41 of the table tap 4. The caulking parts for caulking and fixing the other end are lined up in order. The molding device 8 consists of two molding machines 80 and 80 each having a mold 2.3 set therein, and a circulation path 83 through which the molding auxiliary frame 1 flows. A setting section 81 is provided on the code block crimping device 7 side of the circulation path 83 passing through, and a take-out section 82 is provided on the characteristic testing device 9 side. Then, in the cord block crimping device 7, two sets of primary molded bodies 41 and 51 attached to both ends of the power cord 6 are set in the forming auxiliary frame 1 in the setting section 81, and after the forming is completed, they are taken out. At this point, one molding auxiliary frame is taken out and sent to the characteristic testing device 9 side. Each of the table tap 4 and the power plug 5 - the blow molded body 41
．． To explain about 51, first, table tap 4
The primary molded body 41 is formed by inserting a terminal plate (not shown) equipped with a plurality of sets of blade receiving springs during molding of thermosetting synthetic resin. As shown in the figure, a plug hole 42 is also opened on the end face. As shown in FIG. 19, the primary molded body 51 of the power plug 5 includes a movable part 52 having a pair of plug blades 55 and 55, and a support part 53 that rotatably supports the movable part 52. The power cord 6 connected to the connection terminal part 56 protruding from the support part 53 is connected to the inside of both the support part 53 and the movable part 52 (connected to the plug blade 55 by a conductive member inserted therein). The work of setting such blow-molded bodies 41, 51 in the auxiliary molding frame 1 in the setting section 81 is carried out in the following steps.In other words, in the auxiliary molding frame 1, as described above, two sets of First, with one molded body 41 positioned on the side of the slide cam 14 that is moved back and forth by the cam plate 12, the cam plate 12 is pressed against its extension shaft 12b. The blade-shaped member 15 is moved forward, and the protrusion 15a is moved to the molded body 4.
1 into the plug blade hole 42 that is open on the end surface of the plug. Next, the other molded body 41 is attached to the other slide cam 14.
By positioning it on the side and moving the cam plate 13, the plug blade-like member 15 is advanced and the protrusion 15a is inserted into the plug blade hole 42, so that the two primary molded bodies 41° 41 can be set individually. That's why. For the two primary molded bodies 51, with the sliders 16 and 16 retracted by the cam 85 attached to the set part 81, insert the plug blades 55 into each to clean them.
, and then by retracting the cam 85, the slider 16 is moved forward by the bias of the spring 16b, and the engagement pin 16
a to engage the plug blade 55. Thereafter, the power cord 6 whose both ends are connected to the primary molded body 41.51 is passed through the cord insertion part between the cover pieces 18 in the molding auxiliary frame 1, and the cord clamp fitting 17 is moved while applying tension. Fix the clamp. In this way, the auxiliary molding frame 1 in which the two sets of primary molded bodies 41 and 51 are set is first transferred to the mold 2 through the circulation path 83.
sent to. The mold 2 includes a primary molded body 41 of a table tap 4 set in a molding auxiliary frame 1 and a power plug 5.
This is for performing secondary molding in which the primary molded body 41 of the primary molded bodies 51 is coated with a thermoplastic synthetic resin, and as shown in FIGS. 13 and 14, an upper mold core is The upper die 21a has an ejector pin 22a and a presser pin 23a attached thereto, and the lower die 21a has an ejector turbine 22b, 27 and a positioning pin 23b attached to the lower die core 20b. A space is provided between the upper mold 21a and the lower mold 21b in which the molding auxiliary frame 1 is arranged, and the upper molds 2 and 1a have a slide core 14. By touching the inclined surface 14c at one end, the slide core 1
2 in Figure 8 is provided with a cam 24 that slides 4.
8.29 is the ejector plate, 25a. 25b is a guide lifter for lifting the auxiliary molding frame 1 when moving the auxiliary molding frame 1 along the circulation path 83, and 26b is a lifting pin for the guide lifters 25a and 25b. The guide rift 25b engages with an arm 10c having an inverted triangular cross section formed on the lower surface of the auxiliary molding frame 1 to prevent the auxiliary molding frame 1 from shifting. Therefore, in this mold 2, the molding auxiliary frame 1 is set on the lower mold 21b in the opened state, and at this time, the stopper blade of the positioning pin 23b provided on the lower mold 21b The shaped protrusion is inserted into the plug hole located on the bottom side of the primary molded body 41 which is set upside down to position the primary molded body 41, and also to check the presence or absence of the primary molded body 41 using air. Confirmation is made. When clamping the mold, the presser pin 20 in the upper mold 2 holds down the workpiece 4, and the pair of ejector turbines 22a, 22b
holds the power cord 6, and the cam 24 slides the slide core 14, as shown in FIG. 17(e).
One end surface of the slide core 14 is pressed against the end surface of the workpiece 4. The stroke L of the slide core 14 required at this time may be about liter since the plug blade-like member 15 has already been inserted into the plug blade hole 42.
The pressure with which 4 contacts the primary molded body 41 is kept constant by the spring 24a that urges the cam 24, thereby preventing the occurrence of flashing. - Dimensional variations in the blown body 41 are also absorbed. Once the mold clamping is completed in this way, injection molding is performed by injecting molding resin. Molding resin is fed through the runner 20c. When molding is completed and the mold is opened, the ejector plates 28 and 29 rise to lift the molding auxiliary frame 1, and the ejector plate 29 further rises to remove the table from the positioning pin 23b, ejector pin 22b, etc. The tap 4 is separated, and in this state, the guide lifter 25a is driven by pressing the forming auxiliary frame 1 using an air cylinder or the like. The auxiliary molding frame 1 moves on the mold 25b, and the next auxiliary molding frame 1 is set in the mold 2, and the molded product is sent to the mold 3 side. The mold 3 has a power plug 5 set in the molding auxiliary frame l.
This is for performing secondary molding in which a primary molded body 41 is coated with a thermoplastic synthetic resin, and as shown in FIGS. 15 and 16, an upper mold core 30a is attached and Eject turbine 32a and holding pin 34
an upper ff 131a having a lower mold core 30b and an ejector turbine 32b;
37 and a lower mold 31b having a presser pin 34b, and a space is provided between the upper mold 21a and the lower mold 21b in which the molding auxiliary frame 1 is arranged. In the figure, 38 and 39 are ejector plates, 35a and 35b are guide lifters, and 36b is an elevating bin. In this mold 3, a pair of upper and lower presser pins 34a,
34b holds down the primary formed body 51, and the pair of ejector turbines 32a, 32b hold the power cord 6. As shown in FIG. , 34c,
These inclined surfaces 34c, 34c abut on the upper and lower inclined surfaces of the movable part 52 of the primary molded body 51, and - the blow molded body 51 is moved in a direction perpendicular to the mold clamping direction, that is, the plug blade 55 of the molding auxiliary frame 1.
Move it to the side where it is fixed. Presser pin 34
The pressure with which a contacts the primary molded body 51 is kept constant by the spring 34d that biases it, thereby preventing the occurrence of flakes. In addition, dimensional variations in the blow molded body 51 and slack in the power cord 6 are also absorbed. Once the mold clamping is completed in this way, injection molding is performed by injecting molding resin. The molded resin is fed through the runner 30c, and as shown in FIG. 19(b), the power plug 5 is formed in which the support portion 53 of the blow molded body 51 is covered with the secondary molded body 54. When molding is completed and the mold is opened, the ejector plates 38 and 39 rise to lift the molding auxiliary frame 1, and the ejector plate 39 further rises to remove power from the positioning pin 33b, ejector turbine 32b, etc. The plug 5 is separated, and in this state, the guide lifter 35 is moved by pressing the forming auxiliary frame 1 using an air cylinder or the like.
The auxiliary molding frame 1 moves on the a and 35b, and the next auxiliary molding frame 1 is set in the mold 3, and the molded product is sent to the take-out section 82 side. At the time of setting the primary formed body 51 in the forming auxiliary frame 1,
- There is no need to accurately position the blow molded product 51, and in the mold 3, - the blow molded product 51 is reliably positioned as the mold moves in the clamping direction; Therefore, there is no need to provide such a configuration. In the take-out section 82, the slider 16 of the auxiliary molding frame 1 is moved backward by the cam 85, and the engagement bottle 16b is moved back to the stopper blade 55.
At the same time, by pressing the extension shaft 12c protruding from the cam plate 12 and sliding the cam plate 12 and the cam plate 13, the blade-like member 15 is removed.
The protrusion 15a is pulled out from the table tap 4 by retreating, and the wiring cord removed from the molding auxiliary frame 1 is sent to the next-stage characteristic testing machine 9. The auxiliary molding frame 1 from which the wiring cord has been removed is sent back to the setting section 81 through the circulation path 83.

【Effect of the invention】

As described above, in the present invention, workpieces are set and removed in a molding auxiliary frame equipped with a plug blade-like member inserted into the workpiece and a power cord holding part, and the molding mold is equipped with the molding auxiliary frame together with the molding auxiliary frame. Since it is removable and the workpiece can be set and removed outside the mold, these operations can be performed independently of the molding cycle.Furthermore, the frame with the workpiece attached can be set in the mold. In addition, the female connector can be molded safely and at high speed without causing any obstacles to multi-piece molding or automation.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a molding auxiliary frame according to an embodiment of the present invention, Fig. 2 is an exploded perspective view of the same, Fig. 3 is a plan view of the same, and Fig. 4 is a portion of the same with the cover piece removed. A plan view, FIG. 5 is a broken front view of the same as the above, FIG. 6 is a broken back view of the same as the above, FIG. 7 is a longitudinal sectional view of the table tap holding part of the same as the above, and FIGS. 8 and 9 are horizontal views of the slide core. A cross-sectional view and a front view, FIG. 10 is a vertical cross-sectional view of the power plug holding part, FIG.
Figure 2 is a perspective view and a plan view of the molding device, Figures 13 and 14.
The figure shows a longitudinal cross-sectional view of the table tap mold and a plan view of the lower mold.
Figures 15 and 16 are a longitudinal cross-sectional view of the power plug mold and a plan view of the lower mold, Figures 17 (a), (b), and (e) are perspective views of the primary molded product of the table tap, and Figure 18 is a An explanatory diagram showing the action of the presser pin in the power plug mold, Fig. 19 (
a) and (b) are a perspective view of a primary molded body of a power plug and a perspective view after secondary molding, in which 1 is a molding auxiliary frame, 6 is a power cord, 14 is a slide core, 15 is a plug blade-like member, 21a is an upper mold, 21b is a lower mold, and 41 is a primary molded body. Agent Patent Attorney Ishi 1) Chief 7 Figure 7 Figure 8! 5 Figure 9 Figure 15 Old Juryoku Figure 19

Claims (1)

[Claims] (1) The plug blade-like member is inserted into the workpiece and the holding member is inserted into the molding auxiliary frame, which is equipped with a slide core equipped with a plug-blade-like member that is inserted into the workpiece, and a holding member for the power cord led out from the workpiece. The workpiece is mounted by holding the power cord, and then the frame body is placed between the upper and lower molds, the slide core is brought into contact with the workpiece surface when the upper and lower molds are clamped, and the workpiece is taken out together with the molding auxiliary frame after molding. A method for molding a female connector, characterized by: