TWI844334B - Mold processing device and mold processing method - Google Patents

Abstract

The present invention belongs to the technical field of the mold processing and discloses a mold processing device and a mold processing method. The mold processing device is configured to process a core of a middle plate of an ear cap mold, the external surface of the core on the fractal surface of the middle plate is a main surface, and the external surface of the core below the fractal surface of the middle plate is an edge surface. The mold processing device includes a side electrode and a bottom electrode component. An electrode groove is disposed on the side electrode, and the shape of the electrode groove is the same as a shape of a part of a processing inner wall and the shape of an inner wall of a main body of an ear cap, and the electrode groove is configured to electrical discharge machine the main surface. The bottom electrode component is configured to electrical discharge machine the edge surface. The mold processing method utilizes the above mold processing device to electrical discharge machine the main surface and the edge surface by the side electrode and the bottom electrode component. The mold processing device and the mold processing method provided by the present invention efficiently improves the efficiency of the core processing.

Description

Mold processing device and mold processing method

The present invention belongs to the field of mold processing technology, and in particular relates to a mold processing device and a mold processing method.

The silicone mold middle plate used to manufacture the ear caps of headphones includes a plate body and a core disposed 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 located below the fractal surface of the plate body. Therefore, the outer surface of the core is relatively complex, making it difficult to process. Existing cores are mostly cut and formed by digital control machine tools, but the efficiency of cutting processing is low, and the processing efficiency of the core needs to be improved.

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

The purpose of the present invention is to propose a mold processing device and a mold processing method to solve the technical problem of low core processing efficiency in the prior art.

To achieve this purpose, the present invention adopts the following technical solutions: a mold processing device, used to process the core of the middle plate of the ear cap mold, the outer surface of the core located above the fractal surface of the middle plate of the ear cap mold is the main surface, and the outer surface located below the fractal surface is the edge surface, the mold processing device includes: a side electrode and a bottom electrode assembly. The side electrode is provided with an electrode groove whose processing inner wall is partially the same as the inner wall of the main body of the ear cap, and the electrode groove is used to discharge process the main surface. The bottom electrode assembly is used to discharge process the edge surface.

As a preferred technical solution of the above-mentioned mold processing device, the bottom electrode assembly includes multiple bottom electrodes, each of which is provided with an electrode arc edge, and the inner wall of the undercut portion of the ear cap is divided into multiple unit parts along the circumferential direction, and the processed side wall of the electrode arc edge of each bottom electrode corresponds to the same shape as a unit part.

As a preferred technical solution of the above-mentioned mold processing device, the processing side wall includes a main body and two extensions respectively arranged at the two ends of the main body. In the same processing side wall, the main body has the same shape as a unit part, and the two extensions have the same shape as parts of the other two unit parts adjacent to the unit part.

As a preferred technical solution for the above-mentioned mold processing device, the length of the extension portion in the circumferential direction of the core is not less than 0.40 mm.

As a preferred technical solution for the above-mentioned mold processing device, the number of electrode grooves provided on the side electrode is multiple.

As a preferred technical solution for the above-mentioned mold processing device, the number of electrode arc edges provided on each bottom electrode is multiple, and the processing side walls of all electrode arc edges on the same bottom electrode are oriented in the same direction.

The mold processing method adopts the above mold processing device, and the mold processing method includes: S1, using the side electrode discharge to process the main surface of the core; S2, using the bottom electrode assembly discharge to process the edge surface of the core.

As a preferred technical solution of the above mold processing method, the plurality of bottom electrodes include a first bottom electrode, a second bottom electrode, a third bottom electrode and a fourth bottom electrode, and the above step S2 includes: S21, using the first bottom electrode of the bottom electrode assembly to discharge a first portion of the edge surface; S22, using the second bottom electrode of the bottom electrode assembly to discharge a first portion of the edge surface; Electro-machining the edge surface to form the second part adjacent to the first part; S23, using the third bottom electrode of the bottom electrode assembly to electro-machining the edge surface to form the third part adjacent to the second part; S24, using the fourth bottom electrode of the bottom electrode assembly to electro-machining the edge surface to form the fourth part adjacent to the third part and the first part, forming the entire edge surface.

As a preferred technical solution of the above-mentioned mold processing method, each two adjacent forming surfaces have overlapping parts.

As a preferred technical solution for the above-mentioned mold processing method, the length of the overlapping part is not less than 0.40mm.

The present invention provides a mold processing device, which includes a side electrode and a bottom electrode assembly. The side electrode is provided with an electrode groove whose partially processed inner wall is the same shape as the inner wall of the main body of the ear cap. The electrode groove is used for discharge processing to form the main body surface; the bottom electrode assembly is used for discharge processing to form the edge surface. The arrangement of the side electrode and the bottom electrode assembly realizes the processing of the outer surface of the core. The efficiency of discharge processing is higher than that of cutting processing. Therefore, the mold processing device provided by the present invention effectively improves the processing efficiency of the core.

The present invention also provides a mold processing method, which first uses the side electrode discharge to process the main surface of the core, and then uses the bottom electrode assembly to discharge to 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. The efficiency of discharge processing is higher than that of cutting processing. Therefore, the mold processing method provided by the present invention effectively improves the processing efficiency of the core.

10: Board

101: Fractal surface

20: Core

201: Main body surface

202:Edge surface

1: Side electrode

11: Electrode tank

12: Second substrate

13: Ring-shaped protrusion

21: Bottom electrode

211: Arc edge of electrode

212: First substrate

213: Bump

In order to more clearly explain the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those with ordinary knowledge in the relevant technical field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without making any progressive efforts.

FIG1 is a structural schematic diagram of a silicone mold of an ear cap in the prior art; FIG2 is an enlarged view of point A in FIG1; FIG3 is a partial cross-sectional view of a silicone mold of an ear cap in the prior art; FIG4 is a structural schematic diagram of a side electrode provided in an embodiment of the present invention; FIG5 is a structural schematic diagram of a bottom electrode provided in an embodiment of the present invention; FIG6 is a front view of a first bottom electrode provided in an embodiment of the present invention; FIG7 is a front view of a second bottom electrode provided in an embodiment of the present invention; FIG8 is a front view of a third bottom electrode provided in an embodiment of the present invention; FIG9 is a front view of a fourth bottom electrode provided in an embodiment of the present invention.

The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "installed" should be understood in a broad sense, for example, it can be a mounted connection, or a detachable connection, it can be a mechanical connection, or it can be an electrical connection, it can be a direct connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For those with ordinary knowledge in the relevant technical field, the specific meanings of the above terms in the present invention can be understood according to the specific situation.

In the description of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

The technical solution of the present invention is further explained below with reference to the attached figures and through specific implementation methods.

As shown in Figures 1 to 3, a middle plate of an ear cap silicone mold includes a plate body 10 and a core 20 distributed on the plate body 10. The side of the plate body 10 provided with the core 20 is defined as a fractal surface 101, the outer surface of the core 20 located above the fractal surface 101 of the plate body 10 is defined as a main surface 201, and the outer surface located below the fractal surface 101 is defined as an edge surface 202.

When the ear cap is formed using the silicone mold middle plate, the main body of the ear cap is formed on the outer side of the main body surface 201 of the core 20, and the undercut portion of the ear cap fills the annular groove formed at the edge surface 202. That is, the undercut portion of the ear cap is formed by filling the annular groove.

As shown in Figures 4 to 9, 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 whose part of the processed inner wall is the same shape as the inner wall of the main body of the ear cap. The electrode groove 11 is used for discharge processing to form a main body surface 201; the bottom electrode assembly is used for discharge processing to form an edge surface 202.

The mold processing device provided in this embodiment, the arrangement of the side electrode 1 and the bottom electrode assembly realizes the processing of the outer surface of the core 20, and the efficiency of discharge processing is higher than the efficiency of cutting processing. Therefore, the mold processing device provided in this embodiment effectively improves the processing efficiency of the core 20.

Specifically, as shown in FIG4 , the bottom electrode assembly includes a plurality of bottom electrodes 21, and an electrode arc edge 211 is provided on the bottom electrode 21. The inner wall of the undercut portion of the ear cap is divided into a plurality of unit parts along the circumferential direction, and the partially processed side wall of the electrode arc edge 211 of each bottom electrode 21 corresponds to the same shape as a unit part. Since the undercut portion of the ear cap is retracted toward the center relative to the main body, that is, the edge surface 202 of the core 20 is retracted toward the center relative to the main body surface 201; therefore, 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 a plurality of bottom electrodes 21. During processing, the bottom electrode 21 can be moved from the side to the processing position at the bottom, and the plurality of bottom electrodes 21 are used to sequentially process and form a plurality of positions of the edge surface 202, so that the edge surface 202 is completely processed and formed, thereby ensuring the smooth processing and forming of the edge surface 202 of the core 20.

Specifically, the processed side wall of the electrode arc edge 211 includes a main body and two extensions respectively arranged at the two ends of the main body. In the same processed side wall, the main body has the same shape as a unit part, and the two extensions have the same shape as parts of two other unit parts adjacent to the unit part. In this way, during processing, there will be overlapping parts between the processed surfaces of the adjacent bottom electrodes 21, avoiding the formation of joint marks between the adjacent forming surfaces.

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

As shown in FIG1 , a plurality of cores 20 are arranged on the plate 10. The existing CNC cutting method requires processing the cores 20 one by one, which seriously affects the processing efficiency.

In this embodiment, the number of electrode slots 11 provided on the side electrode 1 is multiple. Each electrode slot 11 is adapted to the position of the core 20 on the plate 10. That is, this embodiment can use the side electrode 1 to simultaneously process and form the main surface 201 of multiple cores 20, thereby effectively improving the processing efficiency.

Specifically, the number of electrode arc edges 211 provided on each bottom electrode 21 is multiple, and the processing side walls of all electrode arc edges 211 on the same bottom electrode 21 are oriented in the same direction. That is, the present embodiment can use the bottom electrode 21 to simultaneously process and form the edge surfaces 202 of multiple cores 20, further improving the processing efficiency. The processing side walls of all electrode arc edges 211 on the same bottom electrode 21 are oriented in the same direction, which facilitates the movement of multiple electrode arc edges 211 of the bottom electrode 21 to the processing position.

As shown in FIGS. 6 to 9 , there are four bottom electrodes 21 , namely a first bottom electrode 21 , a second bottom electrode 21 , a third bottom electrode 21 and a fourth bottom electrode 21 . Taking the orientation shown in Figures 6 to 9 as an example, see Figure 6, the electrode arc edge 211 of the first bottom electrode 21 is set to the left, see Figure 7, the electrode arc edge 211 of the second bottom electrode 21 is set to the right, see Figure 8, the electrode arc edge 211 of the third bottom electrode 21 is set upward, see Figure 9, and the electrode arc edge 211 of the fourth bottom electrode 21 is set downward. The electrode arc edges 211 of the above four bottom electrodes 21 form a circumferentially closed arc wall, which can be processed to form the entire edge surface 202 of the core 20. Of course, in other embodiments, the bottom electrode 21 can also be set to other numbers.

Specifically, as shown in FIG5 , 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 of the bump 213 is connected to the electrode arc edge 211. The electrode arc edge 211 extends obliquely toward one side of its center, and the side wall of the electrode arc edge 211 toward its center is a processing side wall. The arrangement of the bump 213 enables the electrode arc edge 211 to extend into the processing part.

More specifically, as shown in FIG4 , the side electrode 1 includes a second substrate 12 and an annular protrusion 13, and a groove is formed on the second substrate 12. The annular protrusion 13 is arranged on the second substrate 12 and is arranged around the circumferential outer edge of the notch of the groove. The inner space of the annular protrusion 13 and the groove form an electrode groove 11. The inner side wall of the groove has the same shape as the inner wall of the main body of the ear cap, and the inner wall of the annular protrusion 13 has the same shape as the inner wall of part of the undercut portion of the ear cap. The inner side wall of the groove and the inner wall of the annular protrusion 13 form a processed inner wall. When the side electrode 1 forms the main surface 201 of the core 20, part of the edge surface 202 is formed at the same time, that is, there will be an overlapping part between the processed surfaces of the side electrode 1 and the bottom electrode 21, avoiding the formation of joint marks between adjacent forming surfaces.

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

Specifically, the mold processing device provided in this embodiment also includes a discharge machine (not shown in the figure), which includes a carrier, a spindle, a tool magazine, an electrical system, a control box, a display and other structures. A slot is provided on the carrier, and a middle plate supporting part is provided in the slot, and the middle plate supporting part is used to support the plate body 10; the tool magazine is provided on the carrier, located on the side of the middle plate supporting part, and the tool magazine is used to store the side electrode 1 and the bottom electrode 21; the spindle is provided on the carrier, and is located above the middle plate supporting part, and the spindle is used to take 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 ... The electrode 1 or the bottom electrode 21 moves closer to or farther from the 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 equipped with a control system for controlling the movement of the spindle, tool magazine and other structures, and 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. The discharge machine is well known to those with general knowledge in the relevant technical field, and the specific structure and working principle of the above structure will not be introduced in detail.

This embodiment also provides a mold processing method. Using the mold processing device provided in this embodiment, the mold processing method includes: S1, providing an ear cap silicone mold middle plate; using the side electrode 1 to discharge process the main surface 201 of the core 20; S2, using the bottom electrode assembly to discharge process the edge surface 202 of the core 20.

Specifically, step S2 includes: S21, using the first bottom electrode 21 of the bottom electrode assembly to discharge process the first part of the edge surface 202; S22, using the second bottom electrode 21 to discharge process the second part of the edge surface 202 adjacent to the first part; S23, using the third bottom electrode 21 to discharge process the third part of the edge surface 202 adjacent to the second part; S24, using the fourth bottom electrode 21 to discharge process the fourth part of the edge surface 202 adjacent to the third part and the first part, and forming the entire edge surface 202.

Specifically, each two adjacent forming surfaces have overlapping portions.

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

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

More specifically, when the side electrode 1 is subjected to discharge processing, the distance between the wall of the second substrate 12 facing the fractal surface 101 of the plate body 10 and the fractal surface 101 is 0.30mm-0.60mm. When the bottom electrode 21 is subjected to discharge processing, the distance between the wall of the annular protrusion 13 facing the fractal surface 101 of the plate body 10 and the fractal surface 101 is 0.30mm-0.60mm. The above-mentioned distance setting can ensure the requirements of discharge processing, and at the same time, it can also avoid damage to the fractal surface 101 of the plate body 10 during discharge processing.

Obviously, the above embodiments of the present invention are only examples for the purpose of clearly explaining the present invention, and are not intended to limit the implementation of the present invention. For those with ordinary knowledge in the relevant technical field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.

1: Side electrode

11: Electrode tank

12: Second substrate

13: Ring-shaped protrusion

Claims (8)

A mold processing device is used to process a core (20) of a middle plate of an ear cap mold, wherein the outer surface of the core (20) located above a fractal surface (101) of the middle plate of the ear cap mold is a main surface (201), and the outer surface located below the fractal surface (101) is an edge surface (202). The mold processing device comprises: a side electrode (1), the side electrode (1) is provided with an electrode groove (11) having a processing inner wall of a part having the same shape as the inner wall of a main body of an ear cap, and the electrode groove (11) is provided with a processing inner wall of a part having the same shape as the inner wall of a main body of an ear cap. The electrode groove (11) is used for discharge machining the main body surface (201); a bottom electrode assembly is used for discharge machining the edge surface (202) and includes a plurality of bottom electrodes (21), each of the plurality of bottom electrodes (21) is provided with an electrode arc edge (211), the inner wall of an undercut portion of the ear cap is divided into a plurality of unit parts along the circumferential direction, and a machined side wall of the electrode arc edge (211) of each of the plurality of bottom electrodes (21) has the same shape as that of one of the unit parts. According to the mold processing device described in claim 1, the processing side wall includes a main body and two extensions respectively arranged at the two ends of the main body, and in the same processing side wall, the main body has the same shape as one of the unit parts, and the two extensions have the same shape as the other two unit parts adjacent to the unit part. According to the mold processing device described in claim 2, the length of the extension portion in the circumferential direction of the core (20) is not less than 0.40 mm. According to the mold processing device described in claim 1, the number of the electrode grooves (11) provided on the side electrode (1) is multiple. According to the mold processing device described in claim 4, the number of the electrode arc edges (211) provided on each of the multiple bottom electrodes (21) is multiple, and the processing side walls of all the electrode arc edges (211) on the same bottom electrode (21) are oriented in the same direction. A mold processing method, wherein the mold processing device as described in any one of claims 1 to 5 is used, and the mold processing method comprises: S1, using the side electrode (1) to discharge process the main surface (201) of the core (20); S2, using the bottom electrode assembly to discharge process the edge surface (202) of the core (20), wherein the multiple bottom electrodes (21) include a first bottom electrode (21), a second bottom electrode (21), a third bottom electrode (21) and a fourth bottom electrode (21), and the S2, using the bottom electrode assembly to discharge process the edge surface (202) of the core (20) includes: S21, using the bottom electrode assembly The first bottom electrode (21) of the electrode assembly is used to discharge process a first portion of the edge surface (202); S22, the second bottom electrode (21) of the bottom electrode assembly is used to discharge process a second portion of the edge surface (202) adjacent to the first portion; S23, the third bottom electrode (21) of the bottom electrode assembly is used to discharge process a third portion of the edge surface (202) adjacent to the second portion; S24, the fourth bottom electrode (21) of the bottom electrode assembly is used to discharge process a fourth portion of the edge surface (202) adjacent to the third portion and the first portion, thereby forming the entire edge surface (202). According to the mold processing method described in claim 6, each of the two adjacent forming surfaces has an overlapping portion. According to the mold processing method described in claim 7, the length of the overlapping portion is not less than 0.40 mm.