Mold processing device and mold processing method

Abstract

The application belongs to the technical field of mold processing, and discloses a mold processing device and a mold processing method. The mold processing device is used for processing a core of a middle plate of an ear cap mold. An outer surface of the core above a parting surface of the middle plate is a main body surface, and an outer surface of the core below the parting surface is an edge surface. The mold processing device comprises a side electrode and a bottom electrode assembly. An electrode groove with a shape same as that of an inner wall of the main body of the ear cap is arranged on the side electrode, and the electrode groove is used for electric spark processing of the main body surface. The bottom electrode assembly is used for electric spark processing of the edge surface. The mold processing method adopts the mold processing device, and sequentially adopts the side electrode and the bottom electrode assembly for electric spark processing of the main body surface and the edge surface. The mold processing device and the mold processing method effectively improve the processing efficiency of the core.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mold processing, and particularly relates to a mold processing device and a mold processing method. BACKGROUND

[0002] The silica gel mold middle plate for manufacturing the ear cap of earphone comprises a plate body and a core provided on the plate body, the outer surface of the core is arc-shaped, and the outer surface of the bottom end of the core is below the parting surface of the plate body. Therefore, the outer surface of the core is relatively complex, which leads to difficulty in processing. The existing core is mostly cut by a numerical control machine tool, but the cutting processing efficiency is low, and the processing efficiency of the core needs to be improved.

[0003] Therefore, there is an urgent need for a mold processing device and a mold processing method to solve the above technical problems. SUMMARY

[0004] The present application aims to provide a mold processing device and a mold processing method to solve the technical problem of low processing efficiency of the core in the prior art.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] The mold processing device is used for processing the core of the ear cap mold middle plate. The outer surface of the core above the parting surface of the ear cap mold middle plate is a main body surface, and the outer surface below the parting surface is an edge surface. The mold processing device comprises:

[0007] A side electrode is provided with an electrode groove with the same shape as the inner wall of the main body of the ear cap. The electrode groove is used for electric spark processing of the main body surface.

[0008] A bottom end electrode assembly is used for electric spark processing of the edge surface.

[0009] As a preferred technical solution of the above mold processing device, the bottom end electrode assembly comprises a plurality of bottom end electrodes, the bottom end electrodes are provided with electrode arc-shaped edges, the inner wall of the undercut part of the ear cap is divided into a plurality of unit parts along the circumference, and the part of the electrode arc-shaped edge of each bottom end electrode corresponds to the same shape of one unit part.

[0010] As a preferred technical solution of the above mold processing device, the processing side wall comprises a main body part and two extension parts respectively arranged at both ends of the main body part. In the same processing side wall, the main body part is the same as the shape of one unit part, and the two extension parts are respectively the same as the partial shape of the other two unit parts adjacent to the unit part.

[0011] As a preferred technical scheme of the mold processing device, the length of the extension part in the circumferential direction of the core is not less than 0.40 mm.

[0012] As a preferred technical scheme of the mold processing device, the side electrode is provided with a plurality of electrode grooves.

[0013] As a preferred technical scheme of the mold processing device, each bottom electrode is provided with a plurality of electrode arc-shaped edges, and the processing side walls of all the electrode arc-shaped edges on the same bottom electrode are oriented in the same direction.

[0014] A mold processing method using the mold processing device, the mold processing method comprising:

[0015] S1, using the side electrode to electric spark process the main surface of the core;

[0016] S2, using the bottom electrode assembly to electric spark process the edge surface of the core.

[0017] As a preferred technical scheme of the mold processing method, the step S2 comprises:

[0018] S21, using a first bottom electrode of the bottom electrode assembly to electric spark process a first part of the edge surface;

[0019] S22, using a second bottom electrode of the bottom electrode assembly to electric spark process a second part of the edge surface adjacent to the first part;

[0020] S23, using a third bottom electrode of the bottom electrode assembly to electric spark process a third part of the edge surface adjacent to the second part;

[0021] S24, using a fourth bottom electrode of the bottom electrode assembly to electric spark process a fourth part of the edge surface adjacent to the third part and the first part, and forming the entire edge surface.

[0022] As a preferred technical scheme of the mold processing method, each adjacent two forming surfaces have an overlapping part.

[0023] As a preferred technical scheme of the mold processing method, the length of the overlapping part is not less than 0.40 mm.

[0024] The beneficial effects of the present application are:

[0025] The mould processing device provided by the application comprises a side electrode and a bottom electrode assembly, the side electrode is provided with an electrode groove with the same shape as the inner wall of the main body of the ear cap, and the electrode groove is used for electric spark processing the surface of the main body; the bottom electrode assembly is used for electric spark processing the edge surface. The side electrode and the bottom electrode assembly are used to process the outer surface of the core, and the electric spark processing has higher efficiency than the cutting processing, so that the mould processing device provided by the application effectively improves the processing efficiency of the core.

[0026] The application further provides a mould processing method, which comprises the following steps: first, using the side electrode to electric spark process the surface of the main body of the core; and then, using the bottom electrode assembly to electric spark process the edge surface of the core. The side electrode and the bottom electrode assembly are used to process the outer surface of the core, and the electric spark processing has higher efficiency than the cutting processing, so that the mould processing method provided by the application effectively improves the processing efficiency of the core. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the description of the embodiments of the application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art according to the contents of the embodiments of the application and the drawings without any creative effort.

[0028] Figure 1 is a structure diagram of a silicone mould of an ear cap in the prior art;

[0029] Figure 2 is Figure 1 is an enlarged view of A in

[0030] Figure 3 is a partial sectional view of a silicone mould of an ear cap in the prior art;

[0031] Figure 4 is a structure diagram of a side electrode provided by the embodiments of the application;

[0032] Figure 5 is a structure diagram of a bottom electrode provided by the embodiments of the application;

[0033] Figure 6 is a front view of a first bottom electrode provided by the embodiments of the application;

[0034] Figure 7 is a front view of a second bottom electrode provided by the embodiments of the application;

[0035] Figure 8 is a front view of a third bottom electrode provided by the embodiments of the application;

[0036] Figure 9 is a front view of a fourth bottom electrode provided by an embodiment of the present application.

[0037] In the drawings:

[0038] 10, plate body; 101, parting surface; 20, core; 201, main surface; 202, edge surface;

[0039] 1, side electrode; 11, electrode groove; 12, second substrate; 13, annular protrusion;

[0040] 21, bottom electrode; 211, electrode arc-shaped edge; 212, first substrate; 213, protrusion. DETAILED DESCRIPTION

[0041] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which examples of embodiments are shown, and in which like or similar designations denote like or similar elements or parts throughout the various drawings. The embodiments described below through reference to the drawings are examples and are intended to explain the present application, and should not be understood as limiting the present application.

[0042] In the description of the present application, unless explicitly defined and limited otherwise, the terms "connected", "connected", "mounted" should be understood broadly, for example, can be mounted connection, can also be detachable connection, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the description of the present application, unless explicitly defined and limited otherwise, the first feature "on" or "below" the second feature can include that the first feature and the second feature are in direct contact, or the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0044] The technical solutions of the present application are further illustrated below by specific embodiments in conjunction with the drawings.

[0045] As Figures 1 to 3As shown, a silicone ear cap mold plate includes a plate body 10 and cores 20 distributed on the plate body 10. The side of the plate body 10 with the cores 20 is defined as the parting surface 101. The outer surface of the cores 20 above the parting surface 101 of the plate body 10 is the main surface 201, and the outer surface below the parting surface 101 is the edge surface 202.

[0046] When the ear cap is formed using the silicone mold plate, the main body of the ear cap is attached to the outer side of the main body surface 201 of the core 20, and the undercut part of the ear cap is filled into the annular groove at the edge surface 202. That is, the undercut part of the ear cap is formed by filling the annular groove.

[0047] like Figures 4 to 9 As shown, this embodiment provides a mold processing device, which includes a side electrode 1 and a bottom electrode assembly. The side electrode 1 is provided with an electrode groove 11 that is partially processed with the same shape as the inner wall of the main body of the ear cap. The electrode groove 11 is used for electrical discharge machining to form the main body surface 201. The bottom electrode assembly is used for electrical discharge machining to form the edge surface 202.

[0048] The mold processing device provided in this embodiment enables the processing of the outer surface of the core 20 by setting the side electrode 1 and the bottom electrode assembly. The efficiency of electrical discharge machining is higher than that of cutting machining. Therefore, the mold processing device provided in this embodiment effectively improves the processing efficiency of the core 20.

[0049] Specifically, such as Figure 4 As shown, the bottom electrode assembly includes several bottom electrodes 21, each with an arc-shaped electrode edge 211. The inner wall of the ear cap's inverted portion is divided into several unit sections along the circumference. The sidewall of the arc-shaped electrode edge 211 of each bottom electrode 21 corresponds to the shape of a unit section. Since the inverted portion of the ear cap retracts towards the center relative to the main body, that is, the edge surface 202 of the core 20 retracts towards the center relative to the main body surface 201, a single annular electrode cannot be inserted from the head of the core 20 and moved to the bottom for processing. Therefore, the bottom electrode assembly provided in this embodiment includes several bottom electrodes 21. During processing, the bottom electrodes 21 can move from the side to the bottom processing area, and several parts of the edge surface 202 are sequentially processed using several bottom electrodes 21 to ensure that the entire edge surface 202 is processed, thereby guaranteeing the smooth processing of the edge surface 202 of the core 20.

[0050] Specifically, the processed sidewall of the arc-shaped edge 211 of the electrode includes a main body and two extensions respectively disposed at both ends of the main body. In the same processed sidewall, the main body has the same shape as a unit part, and the two extensions have the same shape as portions of two other unit parts adjacent to that unit part. With this arrangement, during processing, there will be an overlap between the processed surfaces of adjacent bottom electrodes 21, avoiding the formation of joint marks between adjacent molding surfaces.

[0051] More specifically, the length of the extension in the circumferential direction of the core 20 is not less than 0.40 mm. That is, the length of the overlap between the machined surfaces of adjacent bottom electrodes 21 is not less than 0.40 mm, further avoiding the appearance of joint marks.

[0052] like Figure 1 As shown, multiple cores 20 are provided on the middle plate 10. The existing CNC cutting method requires machining the cores 20 one by one, which seriously affects the machining efficiency.

[0053] In this embodiment, a plurality of electrode grooves 11 are provided on the side electrode 1. Each electrode groove 11 is adapted to the position of the core 20 on the plate 10. That is, in this embodiment, the main body surface 201 of multiple cores 20 can be processed and formed simultaneously using the side electrode 1, thereby effectively improving the processing efficiency.

[0054] Specifically, each bottom electrode 21 is provided with several electrode arc-shaped edges 211, and the processing sidewalls of all electrode arc-shaped edges 211 on the same bottom electrode 21 face the same direction. That is, in this embodiment, the bottom electrode 21 can be used to simultaneously process and form the edge surfaces 202 of multiple cores 20, further improving processing efficiency. The fact that the processing sidewalls of all electrode arc-shaped edges 211 on the same bottom electrode 21 face the same direction facilitates the movement of multiple electrode arc-shaped edges 211 of the bottom electrode 21 to the processing area.

[0055] like Figures 6 to 9 As shown, four bottom electrodes 21 are provided. Figures 6 to 9 For example, see the directions shown. Figure 6 The first bottom electrode 21 has its arc-shaped edge 211 facing left, see... Figure 7 The second bottom electrode 21 has its arc-shaped edge 211 facing to the right, see... Figure 8 The third bottom electrode 21 has its arc-shaped edge 211 facing upwards, see... Figure 9 The fourth bottom electrode 21 has its arc-shaped edge 211 facing downwards. The arc-shaped edges 211 of the four bottom electrodes 21 form a circumferentially closed arc-shaped wall, which can be processed to form the entire edge surface 202 of the core 20. Of course, in other embodiments, the number of bottom electrodes 21 can also be set to other numbers.

[0056] Specifically, such as Figure 5 As shown, the bottom electrode 21 includes a first substrate 212 and a bump 213. One end of the bump 213 is connected to the first substrate 212, and one side of the other end is connected to the arcuate edge 211 of the electrode. The arcuate edge 211 extends obliquely towards its center, and the sidewall of the arcuate edge 211 towards its center is a processing sidewall. The bump 213 allows the arcuate edge 211 of the electrode to extend into the processing area.

[0057] More specifically, such as Figure 4 As shown, the side electrode 1 includes a second substrate 12 and an annular protrusion 13. A groove is formed on the second substrate 12, and the annular protrusion 13 is disposed on the second substrate 12 and surrounds the circumferential outer edge of the groove opening. The internal space of the annular protrusion 13 and the groove form an electrode groove 11. The inner wall of the groove has the same shape as the inner wall of the ear cap body, and the inner wall of the annular protrusion 13 has the same shape as a portion of the inner wall of the ear cap's clasp portion. The inner wall of the groove and the inner wall of the annular protrusion 13 form a processing inner wall. When the side electrode 1 forms the main body surface 201 of the core 20, a portion of the edge surface 202 is simultaneously formed. That is, there will be an overlap between the processing surfaces of the side electrode 1 and the bottom electrode 21, avoiding the formation of joint marks between adjacent forming surfaces.

[0058] Specifically, the arc length formed by the inner wall of the annular protrusion 13 and the tangent plane passing through its central axis is not less than 0.40 mm. That is, the length of the overlapping portion between the machined surfaces of the side electrode 1 and the bottom electrode 21 is not less than 0.40 mm. The limitation on the length of the overlapping portion further avoids the formation of joint marks.

[0059] Specifically, the mold processing device provided in this embodiment also includes an electrical discharge machine (not shown in the figure). The electrical discharge machine includes a platform, a spindle, a tool magazine, an electrical system, a control box, and a display. The platform is provided with a slot, and a middle plate support is provided in the slot. The middle plate support is used to support the middle plate 10. The tool magazine is provided on the platform, located to the side of the middle plate support. The tool magazine is used to store the side electrode 1 and the bottom electrode 21. The spindle is provided on the platform and located above the middle plate support. The spindle is used to pick up and put the side electrode 1 or the bottom electrode 21 from the tool magazine and drive the side electrode 1 or the bottom electrode 21 to move closer to or away from the middle plate 10. The electrical system is used to supply power to the side electrode 1 and the bottom electrode 21 to realize the discharge of the side electrode 1 and the bottom electrode 21. The control box is provided with a control system for controlling the operation of the spindle, tool magazine, and other structures. The display is used to control the spindle, tool magazine, and other structures and display the data information of the spindle, tool magazine, and other structures. Electrical discharge machining centers are well known to those skilled in the art, and the specific structure and working principle of the above-mentioned structure will not be described in detail.

[0060] This embodiment also provides a mold processing method. Using the mold processing apparatus provided in this embodiment, the mold processing method includes:

[0061] S1. Provide a silicone mold plate for an ear cap; use a side electrode 1 to perform electrical discharge machining to form the main body surface 201 of the core 20;

[0062] S2. The edge surface 202 of the core 20 is produced by electrical discharge machining using the bottom electrode assembly.

[0063] Specifically, step S2 includes:

[0064] S21. The first part of the edge surface 202 is formed by electrical discharge machining using the first bottom electrode 21 of the bottom electrode assembly;

[0065] S22, The second bottom electrode 21 is used to perform electrical discharge machining to form the second part of the edge surface 202 that is adjacent to the first part;

[0066] S23. The third bottom electrode 21 is used to perform electrical discharge machining to form the third part of the edge surface 202 that is adjacent to the second part;

[0067] S24. The fourth bottom electrode 21 is used to perform electrical discharge machining to form the fourth part of the edge surface 202 that is adjacent to the third part and the first part, thus forming the entire edge surface 202.

[0068] Specifically, each pair of adjacent molding surfaces has an overlapping portion.

[0069] More specifically, the length of the overlapping portion is not less than 0.40 mm.

[0070] Specifically, the discharge gap of the side electrode 1 during electrical discharge machining is 0.20mm-0.30mm. The discharge gap of the bottom electrode 21 during electrical discharge machining is 0.03mm-0.05mm.

[0071] More specifically, during electrical discharge machining (EDM), the distance between the wall surface of the second substrate 12 facing the parting surface 101 of the middle plate 10 and the parting surface 101 is 0.30mm-0.60mm. During EDM, the distance between the wall surface of the annular protrusion 13 facing the parting surface 101 of the middle plate 10 and the parting surface 101 is 0.30mm-0.60mm. The above-mentioned spacing ensures the requirements of EDM while avoiding damage to the parting surface 101 of the plate 10 during EDM.

[0072] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A mold processing device for processing a core (20) of an ear cap mold plate, wherein the outer surface of the core (20) above the parting surface (101) of the ear cap mold plate is a main surface (201), and the outer surface below the parting surface (101) is an edge surface (202), characterized in that, The mold processing device includes: Side electrode (1), the side electrode (1) is provided with an electrode groove (11) that is partially machined to the same shape as the inner wall of the main body of the ear cap, the electrode groove (11) is used to electrically discharge machine the surface (201) of the main body. Bottom electrode assembly for electrical discharge machining of the edge surface (202). The bottom electrode assembly includes several bottom electrodes (21), and the bottom electrodes (21) are provided with electrode arc edges (211). The inner wall of the ear cap's inverted part is divided into several unit parts along the circumferential direction. The sidewall of the electrode arc edge (211) of each bottom electrode (21) is processed in the same way as the shape of one of the unit parts.

2. The mold processing device according to claim 1, characterized in that, The processing sidewall includes a main body and two extensions respectively disposed at both ends of the main body. In the same processing sidewall, the main body has the same shape as one of the unit parts, and the two extensions have the same shape as portions of two other unit parts adjacent to the unit part.

3. The mold processing device according to claim 2, characterized in that, The length of the extension in the circumferential direction of the core (20) is not less than 0.40 mm.

4. The mold processing device according to claim 1, characterized in that, The side electrode (1) has a plurality of electrode slots (11).

5. The mold processing device according to claim 4, characterized in that, Each bottom electrode (21) is provided with a plurality of electrode arc edges (211), and the processing sidewalls of all the electrode arc edges (211) on the same bottom electrode (21) have the same orientation.

6. A mold processing method, characterized in that, The mold processing apparatus as described in any one of claims 1-5, wherein the mold processing method comprises: S1. The main body surface (201) of the core (20) is formed by electrical discharge machining using the side electrode (1). S2. The edge surface (202) of the core (20) is formed by electrical discharge machining using the bottom electrode assembly. S2 includes: S21. The first part of the edge surface (202) is electrically and electrically processed using the first bottom electrode (21) of the bottom electrode assembly; S22. The second part of the edge surface (202) adjacent to the first part is formed by electrical discharge machining using the second bottom electrode (21) of the bottom electrode assembly; S23. The third part of the edge surface (202) adjacent to the second part is formed by electrical discharge machining using the third bottom electrode (21) of the bottom electrode assembly; S24. Using the fourth bottom electrode (21) of the bottom electrode assembly, the fourth part of the edge surface (202) adjacent to the third part and the first part is electrically and electrically processed to form the entire edge surface (202).

7. The mold processing method according to claim 6, characterized in that, Each pair of adjacent molding surfaces has an overlapping portion.

8. The mold processing method according to claim 7, characterized in that, The length of the overlapping portion is not less than 0.40 mm.

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