Voice diaphragm hot-pressing forming machine

Abstract

The utility model relates to a voice diaphragm hot-pressing forming machine, which comprises a base, a lower die base is embedded in the top of the base, and a pipe groove I is formed in the middle of the lower die base. A mold groove is formed in the top of the lower mold base, the lower mold is arranged in the mold groove, a placement groove is formed in the top face of the lower mold, a forming groove is formed in the groove bottom of the placement groove, and an arc face protruding upwards is formed in the center of the groove bottom of the forming groove; a telescopic power mechanism I is arranged between the edge of the bottom surface of the upper die base and the outer wall of the base, and a plurality of pipe grooves II are formed in the middle of the upper die base at intervals; arc-shaped grooves are formed in the centers of the bottom surfaces of the upper molds; an ejector pin mechanism; a heat dissipation hole; the lower die holder is provided with the pipe groove I for installing the electric heating pipe, and the pipe groove II and the electric heating pipe are additionally arranged at the corresponding position of the upper die holder, so that the two-way synchronous heating of the voice diaphragm material is realized, and the buckling deformation phenomenon caused by temperature difference is obviously reduced.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm production technology, specifically a diaphragm hot pressing molding machine. Background Technology

[0002] Diaphragms are key components in electroacoustic devices (such as loudspeakers and headphones), and their molding quality directly affects acoustic performance. Traditional diaphragm manufacturing typically employs a thermoforming process, where material is placed in a mold and shaped by heating and pressurizing. However, existing thermoforming equipment suffers from the following technical problems:

[0003] (1) Slow mold heating effect: Existing equipment generally only installs heating elements on the lower mold base, while the top of the diaphragm also needs to be heated. The bottom-up heating method easily leads to uneven heating of the diaphragm, resulting in poor molding.

[0004] (2) Insufficient heat dissipation efficiency: After hot pressing, heat accumulates in some parts of the mold. The general cooling method is natural cooling, but the cooling time is long and the cooling efficiency is low.

[0005] To address the aforementioned issues, there is an urgent need to design a diaphragm hot pressing machine with uniform heating, rapid demolding, efficient heat dissipation, and a modular mold structure to improve production efficiency and product quality. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a diaphragm hot pressing molding machine with high thermal efficiency and good heat dissipation, which addresses the shortcomings of the existing technology.

[0007] The technical problem to be solved by this utility model is achieved through the following technical solution: a diaphragm hot pressing molding machine, which includes a base;

[0008] A lower mold base is embedded in the top of the base, and several tube grooves I for accommodating electric heating tubes are opened in the middle of the lower mold base;

[0009] The lower mold has a mold groove on the top of the lower mold base. The lower mold is placed in the mold groove. A placement groove is opened on the top surface of the lower mold. Several forming grooves are opened at intervals on the bottom of the placement groove. An upward convex arc surface is formed at the center of the bottom of the forming groove.

[0010] The upper mold base has a telescopic power mechanism I that drives the upper mold base to move vertically between its bottom edge and the outer wall of the base. Several tube grooves II are opened at intervals in the middle of the upper mold base.

[0011] Several molds are located directly above the forming groove, with their top surfaces fixed to the bottom surface of the upper mold base. An arc-shaped groove is formed at the center of the bottom surface of the upper mold.

[0012] The ejector mechanism has a receiving groove at the bottom of the base. A telescopic power mechanism II is vertically installed in the receiving groove. A drive plate is fixed at the top of the telescopic power mechanism II. Several ejector pins are vertically fixed on the top surface of the drive plate. The top of the ejector pins passes through the lower mold base and the lower mold and extends to the bottom of the forming groove.

[0013] The heat dissipation hole is provided between the lower mold base and the lower mold of two adjacent molding grooves. The air inlet of the heat dissipation hole is located at the top of the receiving groove and the air outlet is located at the bottom of the molding groove.

[0014] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the above-mentioned diaphragm hot pressing molding machine, wherein the tube groove I and tube groove II are horizontally arranged.

[0015] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the above-mentioned diaphragm hot pressing molding machine, wherein the telescopic power mechanism I and the telescopic power mechanism II are respectively provided in a pair.

[0016] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the drive plate of the above-mentioned diaphragm hot pressing molding machine is horizontally set.

[0017] Compared with the prior art, the beneficial technical effects of this utility model are:

[0018] (1) While the lower mold base is equipped with the tube groove I for installing the electric heating tube, the upper mold base is equipped with the tube groove II and the electric heating tube at the corresponding position, realizing bidirectional synchronous heating of the sound diaphragm material. This structure effectively solves the problem of uneven heating caused by traditional single downward heating. With the precise alignment design of the upper mold arc groove and the lower mold forming groove arc surface, the thermal expansion coefficient of each part of the material is consistent during the hot pressing process, thereby ensuring that the sound diaphragm has uniform thickness and reasonable stress distribution after forming. In particular, for sound diaphragms with complex curved surface structures, this design can significantly reduce the warping deformation caused by temperature difference.

[0019] (2) By setting through-type heat dissipation holes between the lower mold base and the lower mold, the traditional natural cooling is changed to active convection heat dissipation, and the cooling efficiency is improved. The heat dissipation holes adopt a special direction design of bottom air intake and molding groove air outlet. With the cooperation of the ejector mechanism, a "cooling airflow-ejection demolding" is formed: when the telescopic power mechanism II drives the ejector pin to rise and demold, the compressed air in the containment groove forms a cooling airflow from bottom to top through the heat dissipation holes, which not only accelerates the cooling of the mold, but also uses the airflow pressure to assist the sound diaphragm to detach from the cavity, avoiding product damage that may be caused by traditional demolding. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0021] Figure 2 This is a top view of the lower mold of this utility model.

[0022] Reference numerals in the attached drawings: 1. Base; 2. Lower mold base; 3. Tube groove I; 4. Lower mold; 5. Mold groove; 6. Placement groove; 7. Forming groove; 8. Arc surface; 9. Upper mold base; 10. Telescopic power mechanism I; 11. Tube groove II; 12. Upper mold; 13. Arc groove; 14. Receiving groove; 15. Telescopic power mechanism II; 16. Drive plate; 17. Ejector pin; 18. Heat dissipation hole. Detailed Implementation

[0023] The specific technical solutions of this utility model are further described below with reference to the accompanying drawings, so as to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0024] Example 1, referring to Figure 1-2 A diaphragm hot pressing molding machine includes a base 1, which is formed into a generally square base, and its size and specifications can be selected according to the usage requirements.

[0025] A lower mold base 2 is embedded on the top of the base 1. The lower mold base 2 is formed into a roughly square structure. Several tube grooves I3 for accommodating electric heating tubes are opened in the middle of the lower mold base 2. The tube grooves I3 are set horizontally, and their number can be selected according to the usage requirements.

[0026] The lower mold 4 is formed into a square plate structure. A mold groove 5 is provided on the top of the lower mold base 2. The mold groove 5 is formed into a roughly square groove. The lower mold 4 is placed in the mold groove 5. A placement groove 6 is provided on the top surface of the lower mold 4. The placement groove 6 is formed into a roughly square groove. Several forming grooves 7 are provided at intervals on the bottom of the placement groove 6. The forming grooves 7 are formed into roughly circular grooves. An upwardly convex arc surface 8 is formed at the center of the bottom of the forming groove 7. The arc surface 8 can be selected according to the customization requirements of the diaphragm.

[0027] The upper mold base 9 has a telescopic power mechanism I10 between its bottom edge and the outer wall of the base 1, which drives the upper mold base 9 to move vertically. The telescopic power mechanism I10 can be a pneumatic cylinder or a hydraulic cylinder, and its air source and hydraulic power source can be provided externally. A pair of telescopic power mechanisms I10 are symmetrically arranged. Several tube grooves II11 are opened at intervals in the middle of the upper mold base 9. The number of tube grooves II11 can be selected according to the usage requirements. The tube grooves II11 are horizontally arranged.

[0028] Several upper molds 12 are formed into a roughly square plate structure, which is located directly above the forming groove 7. Its top surface is fixed on the bottom surface of the upper mold base 9. An arc groove 13 is formed in the center of the bottom surface of the upper mold 12. The curvature of the arc groove 13 can be customized according to the surface curvature of the diaphragm, and its curvature is consistent with the surface curvature of the diaphragm.

[0029] To facilitate demolding of the molded diaphragm, we added an ejector mechanism. The bottom of the base 1 is provided with a receiving groove 14, which is roughly square. A telescopic power mechanism II 15 is vertically arranged in the receiving groove 14. The telescopic power mechanism II 15 can be a cylinder or a hydraulic cylinder, and its air source and hydraulic power source can be provided externally. A pair of telescopic power mechanisms II are symmetrically arranged. A drive plate 16 is fixedly provided at the top of the telescopic power mechanism II 15. The drive plate 16 is roughly square plate structure and is horizontally arranged. Several ejector pins 17 are vertically fixed on the top surface of the drive plate 16. The ejector pins 17 are vertically arranged and are roughly cylindrical rod structure. The top of the ejector pins 17 penetrates the lower mold base 2 and the lower mold 4 and extends to the bottom of the molding groove 7.

[0030] To accelerate the heat dissipation efficiency of the sound diaphragm after hot pressing, we have added heat dissipation holes 18. A heat dissipation hole 18 is provided between the lower mold base 2 and the lower mold 4 between two adjacent molding grooves 7. The air inlet of the heat dissipation hole 18 is located at the top of the receiving groove 14, and the air outlet is located at the bottom of the molding groove 7. It can be supplied with air by a fan (not shown in the figure) built into the receiving groove 14 of the base 1, or by air supply through the air source pipeline in the factory area.

[0031] The process of using the diaphragm hot pressing molding machine in Example 1 is as follows:

[0032] (1) Loading and mold closing: Place the sound diaphragm material to be formed into the forming groove 7 of the lower mold 4, ensuring that the material fits against the arc surface 8 at the bottom of the groove. Start the telescopic power mechanism I10 to drive the upper mold base 9 to press down, so that the arc groove 13 of the upper mold 12 and the forming groove 7 of the lower mold 4 are aligned and closed. At the same time, the electric heating tubes in the upper and lower mold bases 2 heat up synchronously, so that the material is heated and softened evenly.

[0033] (2) Hot pressing and cooling: Maintain the set temperature and pressure for a period of time to allow the material to be fully shaped. After hot pressing, start the heat dissipation system. The airflow blows from the bottom to the top through the heat dissipation hole 18 to accelerate the cooling of the mold. At the same time, the telescopic power mechanism II 15 pushes the ejector pin 17 to rise to assist in demolding.

[0034] (3) Demolding and part removal: After cooling is completed, the telescopic power mechanism I10 drives the upper mold base 9 to return to its original position, and the ejector pin 17 continues to lift, so that the molded diaphragm is completely separated from the lower mold 4, and the operator can take out the finished product.

Claims

1. A diaphragm hot pressing molding machine, characterized in that: It includes a base; A lower mold base is embedded in the top of the base, and several tube grooves I for accommodating electric heating tubes are opened in the middle of the lower mold base; The lower mold has a mold groove on the top of the lower mold base. The lower mold is placed in the mold groove. A placement groove is opened on the top surface of the lower mold. Several forming grooves are opened at intervals on the bottom of the placement groove. An upward convex arc surface is formed at the center of the bottom of the forming groove. The upper mold base has a telescopic power mechanism I that drives the upper mold base to move vertically between its bottom edge and the outer wall of the base. Several tube grooves II are opened at intervals in the middle of the upper mold base. Several molds are located directly above the forming groove, with their top surfaces fixed to the bottom surface of the upper mold base. An arc-shaped groove is formed at the center of the bottom surface of the upper mold. The ejector mechanism has a receiving groove at the bottom of the base. A telescopic power mechanism II is vertically installed in the receiving groove. A drive plate is fixed at the top of the telescopic power mechanism II. Several ejector pins are vertically fixed on the top surface of the drive plate. The top of the ejector pins passes through the lower mold base and the lower mold and extends to the bottom of the forming groove. The heat dissipation hole is provided between the lower mold base and the lower mold of two adjacent molding grooves. The air inlet of the heat dissipation hole is located at the top of the receiving groove and the air outlet is located at the bottom of the molding groove.

2. The diaphragm hot pressing molding machine according to claim 1, characterized in that: The aforementioned pipe trench I and pipe trench II are arranged horizontally.

3. The diaphragm hot pressing molding machine according to claim 1, characterized in that: The telescopic power mechanism I and telescopic power mechanism II are each provided in pairs.

4. The diaphragm hot pressing molding machine according to claim 1, characterized in that: The drive board is set horizontally.

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