Electric spark electrode capable of being processed on four sides

Abstract

The electric spark electrode comprises an electrode reference table and an electrode body, the electrode body is fixedly connected to the top end of the electrode reference table, the electrode body is in a rectangular ring shape, a through groove allowing a boss to enter is formed in the middle of the electrode body, and the through groove penetrates through the electrode body and the electrode reference table. The electrode can directly machine a groove around a boss in a mold at a time, the problems that inevitable errors are generated due to multiple times of tool setting after the machining electrode is replaced, the machining face of the groove of the mold is uneven, and the attractiveness and functionality of a follow-up injection molding part are affected are solved, the boss can be ignored through the electrode, and the machining efficiency is improved. And the boss is prevented from directly entering the groove for processing, so that the length of the electrode can be reduced, the red copper consumption of the electrode is reduced, and the processing cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of electric processing of injection molds, and particularly relates to an electric spark electrode capable of processing on four sides. Background Art

[0002] Electrospark forming is a crucial process for machining special features of plastic molds (such as grooves or ribs), capable of completing tasks that machining centers cannot. Through pulsed discharge corrosion, electric sparks can create complex shapes in hard molds, facilitating subsequent injection molding of high-quality products. EDM technology primarily uses electrodes to perform corrosion. This involves maintaining a small gap between the electrode and the mold while applying a strong pulse voltage (reaching the breakdown voltage of the dielectric in the gap) between the electrode and the mold. Due to the small discharge area and short discharge time, the concentrated energy can generate temperatures as high as 10,000-12,000 degrees Celsius, effectively etching the mold surface and achieving the desired molding process.

[0003] However, in actual production, some molds have deeper grooves due to design requirements, and the grooves also have higher bosses 5 to block the electrode from extending into the grooves, resulting in unqualified processing. Figure 1 and Figure 2 As shown in the partial mold diagram, the mold contains a high boss 5, surrounded by four grooves of different depths: a first groove 1, a second groove 2, a third groove 3, and a fourth groove 4. When machining this type of mold, the electrode needs to avoid the middle boss 5 and extend into the deep grooves to machine this area. There are two specific practical operations. One is to make a conventional electrode with a very high height. However, since the conventional electrode needs a clamp to clamp it, the clamp will be blocked by the boss 5. Therefore, the electrode height is completely controlled by the height of the boss 5, and the height of the boss 5 is not consistent. The higher the boss 5, the longer the electrode. The electrode of the electric spark is usually made of copper, which is expensive. The more copper is used, the higher the cost. The other method is to make electrodes according to the size of the groove. Two electrodes are made for four grooves, one long electrode and one short electrode, and four grooves are processed respectively. However, this method requires replacing two identical grooves after they are processed, and replacing them with another electrode until the four electrodes are processed. However, when replacing the electrode, the electrode needs to be re-calibrated and the reference surface needs to be found. However, the error of manual calibration is large, resulting in poor consistency of the grooves. There will be height differences at the joints between them, making it difficult to control the processing accuracy, thereby affecting the aesthetics of the subsequent injection-molded plastic products. Utility Model Content

[0004] The utility model aims to provide an electric spark electrode capable of processing on four sides, so as to solve the problem that the existing electrodes cannot meet the existing processing requirements, resulting in increased processing costs and affected processing accuracy.

[0005] An electric spark electrode that can be processed on four sides in this scheme includes an electrode base and an electrode. The electrode is fixedly connected to the top of the electrode base. The electrode is a rectangular ring. The middle of the electrode contains a through groove for the boss to enter. The through groove runs through the electrode and the electrode base.

[0006] The working principle of this solution is: when in use, the electrode is fixed to the electrode fixture of the EDM machine, and then the electrode can be directly controlled to enter the four grooves of the mold to be processed, and the boss in the center of the groove enters the through groove in the center of the electrode, and the EDM of the four grooves is completed simultaneously in one step.

[0007] This electrode was developed by a customer during the actual production process based on the problem that the electrode could not extend into the groove around the boss due to the boss being too high. After multiple rounds of research and development and debugging of the electrode, and based on actual use results and cost considerations, the other two methods of lengthening the electrode and splitting the electrode were eliminated. After the research and development and debugging of the electrode were completed, it was put into production, greatly increasing the production efficiency of the mold and achieving the following beneficial effects.

[0008] Beneficial effects: 1. The electrode can process rectangular grooves on all four sides at one time, avoiding the inconsistency of EDM plane caused by multiple tool adjustments, thus enhancing the accuracy of the injection mold and improving the aesthetics of the injection molded parts.

[0009] 2. The middle of the electrode is hollow, and the boss can directly contact the outside through the center of the electrode, avoiding the situation where the electrode is not processed in place due to the obstruction of the boss. The hollowing out of the middle allows the electrode to ignore the existence of the boss, avoiding the situation where the electrode cannot enter the groove due to the obstruction of the boss, shortening the length of the electrode, greatly reducing the amount of copper used in the electrode, and reducing the cost of the electrode.

[0010] Furthermore, a plurality of threaded holes are provided on one side of the electrode base station containing the electrode, and the threaded holes are used for mounting the electrode and the electrode fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the structure of the mold in the background technology;

[0012] Figure 2 for Figure 1 A top view of

[0013] Figure 3 This is a schematic structural diagram of an electric spark electrode capable of four-sided processing according to the present invention;

[0014] Figure 4 for Figure 3 The main view;

[0015] Figure 5 for Figure 4 Cross-sectional view along AA. DETAILED DESCRIPTION

[0016] The following is further described in detail through specific implementation methods:

[0017] The reference numerals in the drawings of the specification include: a first groove 1 , a second groove 2 , a third groove 3 , a fourth groove 4 , a boss 5 , an electrode reference platform 6 , an electrode 7 , and a threaded hole 8 .

[0018] The embodiment is basically as shown in the attached Figures 3 to 5 As shown: An electric spark electrode that can be processed on four sides, including an electrode 7 and an electrode reference platform 6, the electrode reference platform 6 is a rectangular parallelepiped, the electrode 7 is fixedly connected to the bottom of the electrode reference platform 6, and is tilted relative to the electrode 7 reference platform, the electrode 7 is a rectangular ring, and the middle of the electrode 7 contains a through groove for the boss 5 to enter, the through groove passes through the electrode 7 and the electrode reference platform 6, the electrode reference platform 6 is provided with four threaded holes 8, and the threaded holes 8 are grouped in pairs and located on both sides of the electrode 7.

[0019] The specific implementation process is as follows: when in use, the electrode reference table 6 and the electrode fixture are fixed together by bolts passing through the four threaded holes 8, the electrode 7 is pointed downward at the mold to be processed, and the electrode 7 is aligned with the position to be processed below and then lowered, so that the electrode 7 extends into the groove to perform electrospark machining on the groove;

[0020] The electrode 7 can directly process the grooves around the boss 5 in the mold at one time, avoiding the inevitable errors caused by multiple tool adjustments after replacing the processing electrode 7, resulting in uneven processing surfaces of the mold grooves, affecting the appearance and functionality of subsequent injection molded parts. In addition, the electrode 7 can ignore the existence of the boss 5, avoid the boss 5 and directly enter the groove for processing, which can reduce the length of the electrode 7, reduce the amount of copper used in the electrode 7, and reduce the processing cost.

[0021] The above is only an embodiment of the present invention, and the commonly known specific structures and characteristics of the scheme are not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, and these should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An electric spark electrode capable of processing on four sides, characterized in that: It includes an electrode base platform and an electrode, wherein the electrode is fixedly connected to the top of the electrode base platform, the electrode is in a rectangular ring shape, and the middle of the electrode contains a through groove for the boss to enter, and the through groove runs through the electrode and the electrode base platform.

2. The four-side processable electric spark electrode according to claim 1, characterized in that: A plurality of threaded holes are provided on one side of the electrode base station containing the electrode.

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