JPH01176684A - High voltage block for power source and its united formation method - Google Patents

Abstract

PURPOSE:To seek to shorten manufacturing process by injecting synthetic resin into a cavity after positioning a conductive guide and inserting it through a pad material and then fixing it through a fixing member in an engaging hole so as to stick upper and lower molds. CONSTITUTION:An insertion recess 26a with which the terminal 40a of a guide 40 for conduction of electricity is formed at the specified position of the inside wall of the cavity 22 of the lower mold 20 of a block 10 to be formed, and a screw hole 28 in which the tip of a bolt 52 for a fixing member 50 is screwed is formed at a required position. And an insertion recess 36a with which the terminal 40a of the guide 40 for conduction of electricity is formed similarly at the specified position of the inside wall 34 of the cavity 32 of an upper mold 30. The guide 40 for conduction of electricity is inserted into the cavity 22 of the lower mold 20 and the fixing member 50 is joined together and the bolt 52 is inserted and screwed into a through hole 50a and the engaging hole 28 of the cavity 22. And a pad material 54 is interposed between the head face of each terminal 40a and the bottom of each terminal insertion recess 26a' inside the terminal insertion recess so as to fix each terminal. Hereby even if fused insulating synthetic resin is injected at high pressure, the terminal does not slip off.

Description

[Detailed Description of the Invention] [[] Objective 1 (Field of Industrial Application) The present invention relates to a high voltage block for power supply and a method for molding the same, and more specifically to a power supply in which required terminals, grids, etc. are integrally molded. This article relates to a high voltage block for use and its integral molding method.

<Technology from 6e onwards) Conventionally, for example, in a high-voltage block for a power supply of a copying machine, various parts such as a negative high-voltage terminal, a transfer high-voltage terminal, a static elimination needle terminal, a developing high-voltage terminal, and a grid are manually inserted into the block. Manufactured by assembling one piece at a time.

Therefore, it is difficult to manually assemble the parts and position them in the mold, and the vibrations of the machine that injects the molten plastic under high pressure may cause these parts to move from their designated positions or be press-fitted. The resin may leak.

Additionally, molten synthetic resin may leak and flow into unnecessary component insert recesses.

Furthermore, it is extremely difficult to fix the block precisely in the center position with respect to the surrounding insulators and coating layers at the required points, and to maintain the necessary edge distance between the block and the electrical product. , assembly was inefficient.

Therefore, a method of setting the previously manufactured parts in the upper and lower molds could be considered, but since it is injection molding, these parts would move from their desired positions, and as mentioned above, the molten plastic would flow into unnecessary parts insert holes, which is inconvenient. there were.

Moreover, the manufacturing method became complicated, and an increase in costs was unavoidable.

(Problems to be Solved by the Invention) This invention aims to eliminate the above-mentioned drawbacks, and its gist is to provide insulation at predetermined locations in each cavity of the upper and lower molds of the block to be molded, except for required terminals. a step of positioning the covered conductive guide and inserting it through the material; a step of fixing a required part of the conductive guide into a fitting hole drilled in the inner wall surface of the cavity via a fixing member; After bringing the upper and lower molds into close contact with each other, injecting a required molten insulating synthetic resin into the cavity from the through hole for introducing the molten synthetic resin;
The present invention relates to a method for integrally molding a high voltage block for a power source, which comprises a process in which the molten synthetic resin is cooled, hardened, and then removed from the mold, and a high voltage block for a power source molded by the integral molding method.

"Horizontal" (Example) Examples of each invention related to this application will be described in the accompanying drawings. In Figures 1 to 4, the block 1 to be molded
Insert recesses 26a to 26g into which terminals 40a-σ of a conductive guide 40, which will be described later, are fitted are formed at predetermined locations on the inner wall surface 24 of the cavity 22 of the lower mold 20 of No. 0.

Furthermore, the bolts 52 of the fixing member 50 are attached to the required locations of the conductive guide 40 on the inner wall surface 24 of the cavity 22 of the lower mold 20.
A threaded hole 28 is formed into which the tip of the threaded hole 28 is threaded.

Upper mold 30 corresponding to cavity 22 of lower mold 20
Insert recesses 36a to 36g, into which the terminals 40a to Q of the conductive guide 40 are fitted, are formed at predetermined locations on the inner wall surface 34 of the cavity 32.

The conductive guide 40 is provided with an insulating coating except for the bottom terminals 40a to 40a.

A conductive guide 40 is provided in the cavity 22 of the lower mold 20.
The fixing member 50 of FIG. 7 is aligned with the conductive guide, and the bolt 52 is inserted into the through hole 50a of the fixing member and the screw hole 28 of the cavity 22 and screwed together.

and each terminal 40 within the terminal insert recesses 22a-g.
The material 54 shown in FIG. 8 is interposed between the head surfaces of a to 9 and the bottom of each terminal insert recess 26a to g to fix each terminal, and molten insulating synthetic resin is injected under high pressure. Make sure that the terminal does not shift even when

The cavity 32 of the upper mold 30 is aligned with the cavity 22 of the lower mold 20 via a positioning pin (not shown) and fixed as one body.

Molten insulating synthetic resin is injected into the mold 20.30 through an injection hole (not shown). This molten insulating synthetic resin is produced at high temperature (approximately 300℃) and high pressure (70kQ/(-
) is injected.

If the molten insulating synthetic resin is cooled, cured, and then demolded, a high-voltage block 10 for power supply shown in the first UA is obtained.

"Function and Effect" As described above, according to the method of integrally molding the high voltage block for power supply of a copying machine according to the present invention, the -th order high voltage terminal and the transfer high voltage terminal are provided on the conductive guide 40, and the static elimination needle, Since the development high voltage terminal, grid, etc. can be connected to the conductive guide 40, integral molding is possible.

Therefore, compared to the conventional manufacturing method in which these parts were assembled one by one into blocks by hand, the manufacturing process is significantly improved and shortened.

Then, each terminal 40 is inserted into the terminal insert recesses 26a to 26q.
2. Fix each terminal by interposing the member 54 shown in FIG. 8 between the head surfaces of a to g and the bottoms of the respective terminal insert recesses 26a to g. Furthermore, since the conductive guide 40 is fixed to the wall surface of the cavity 22 via the fixing member 50 and the bolt 52 at the required portions in the longitudinal direction, even if the molten insulating synthetic resin is injected under high pressure, the synthetic resin will remain intact. As a result, there is no misalignment of the terminal or conductive guide.

[Brief explanation of the drawing]

1 is a front view of a high voltage block for power supply integrally molded by the method according to the present invention, FIG. 2 is a left side view of FIG. 1, and FIG. 3 is a right side view of FIG. 4 is a sectional view taken along the line IV-IV in FIG. 6 is a front view of the conductive guide, FIG. 1 is a front view of the fixing member and bolt, and FIG. 8 is a front view of the material. 10... High voltage pro-tsuku for power supply: 20... Lower mold: 22... Cavity: 26a - (1... Terminal insert recess; 28...
・Bolt screw hole of fixing member: 30... Upper mold: 32... Cavity: 40... Conductive guide: aoa - (J... Terminal: 50... Fixing member : 50a...Through hole; 52...Bolt: 54...This material.

Claims (2)

[Claims] (1) A process of positioning an insulated conductive guide except for required terminals in the insert recesses at predetermined locations in each cavity of the upper and lower molds of the block to be molded, and inserting the conductive guide through the material; A step of fixing the required parts of the mold into the fitting hole drilled in the inner wall surface of the cavity via a fixing member; After the upper and lower molds are brought into close contact, the required parts of A method for integrally molding a high-voltage block for a power supply, comprising a step of injecting a molten insulating synthetic resin; and a step of demolding the molten synthetic resin after cooling and hardening. (2) A high-voltage block for power supply according to claim (1), in which the terminals of the conductive guide covered with insulation except for the required terminals are exposed in each insert recess formed at the required location of the main body. .