Hot-pressing forming machine

Abstract

The utility model provides a hot-press forming machine which comprises a rack, a fixed first template, a high-frequency heating ring correspondingly arranged on the periphery of the first template, a second template movably installed on the rack and opposite to the first template, and a die assembly driving device for driving the second template, a sealing box with an opening facing the second template is further arranged outside the first template in a covering mode, a cover plate capable of being sealed and covered with the opening of the sealing box is further arranged on the side, away from the first template, of the second template, and the sealing box is further provided with an air inlet hole for filling protective gas and an air exhaust hole; the sealing box or the cover plate is slidably installed in the mold closing direction, and an elastic assembly is arranged on the outer side of the sealing box or the cover plate. When the first mold plate and the second mold plate are closed, the cover plate covers the sealing box to form the sealing cavity, and then air is pumped away and protective gas is filled, so that the inside is lack of oxidation conditions, the heated mold is not prone to being oxidized and damaged in the production process, the service life of the mold is prolonged, and then the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hot pressing forming equipment for curved panels. Background Art

[0002] Curved screen glass used in electronic products such as mobile phones, as well as curved back covers and protective films made from thermoplastic materials like PC and PET, are all formed by hot-pressing sheets using a hot-pressing mold. During the hot-pressing process, the product is heated to a certain temperature in the mold to soften it, then shaped using mold pressure. The mold pressure is then maintained for a certain period of time to allow it to cool and set, before it is finally opened and removed. Repeated heating and cooling of the mold during production can lead to rapid oxidation and damage, necessitating frequent mold replacements and resulting in high production costs. Utility Model Content

[0003] The utility model aims to provide a hot pressing molding machine which can slow down oxidation damage of a mold and thus reduce production costs.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A hot press forming machine for hot bending and forming curved panels, comprising a frame, a first template fixedly mounted on the first end of the frame, a high-frequency heating ring corresponding to the outer periphery of the first template, a second template movably mounted on the second end of the frame and opposite to the first template, and a mold closing drive device for driving the second template to move toward the first template to close the mold; the first template is also covered with a sealing box with an opening facing the second template, and the side of the second template away from the first template is also provided with a cover driven by the mold closing drive device and capable of sealing with the opening of the sealing box, and the sealing box is also provided with an air inlet and an air exhaust hole for filling with protective gas; the sealing box or the cover is slidably installed along the mold closing direction, and the sliding sealing box or the cover is provided with an elastic component on the outside along the mold closing direction.

[0006] A preferred solution is that the mold closing drive device includes a motor, a reducer, a transmission screw connected in sequence, and a plurality of first guide rods that are installed in transmission with the transmission screw and arranged along the mold closing direction; the back of the second template is fixed to the first guide rod, and also includes a mounting plate that is arranged parallel and spaced apart on the back of the second template and is fixed on the first guide rod, and the mounting plate is mounted on the frame through a guide rail pair arranged along the mold closing direction; the cover plate is arranged parallel between the second template and the mounting plate, and the cover plate is slidably installed on the first guide rod through a first guide sleeve, and the elastic component is arranged between the cover plate and the mounting plate; the sealing box is fixedly mounted on the frame.

[0007] In a preferred embodiment, the guide rail pair includes two groups respectively arranged at both ends of the mounting plate, and the two ends of the mounting plate are respectively provided with supports mounted with the guide rail pair, and the elastic component is arranged between the support and the cover plate and is a plurality of springs distributed along the length direction of the support.

[0008] In a preferred embodiment, the sealing box is fixedly mounted on the frame, and a first through hole is provided on one side wall of the sealing box. The sealing box further comprises a mounting base covering the first through hole, and the high-frequency heating ring is fixedly mounted on the mounting base.

[0009] In a preferred embodiment, the mounting base includes a first plate covering the first through hole, a second through hole opened in the center of the first plate, and a second plate covering the second through hole; a first long groove along the Z-axis is opened at the four corners of the first plate, and the first plate is locked to the side wall of the sealing box by a screw passing through the first long groove; a second long groove along the X-axis is opened at the four corners of the second plate, and the second plate is locked to the first plate by a screw passing through the second long groove; and the high-frequency heating ring is fixed to the second plate.

[0010] In a preferred embodiment, the side wall of the sealing box has a first guide strip arranged parallel to the Z axis on both sides of the first plate, and the side wall of the sealing box is also threadedly mounted with a first adjusting screw that drives the first plate to move between the two first guide strips along the Z axis.

[0011] In a preferred embodiment, the side wall of the first plate has second guide strips arranged parallel to the X-axis on both sides of the second plate, and the first plate is also threadedly mounted with a second adjusting screw that drives the second plate to move along the X-axis between the two second guide strips.

[0012] In a preferred embodiment, the first template is fixedly mounted on the frame via a plurality of second guide rods on the back side along the mold closing direction, and the bottom surface of the sealing box is slidably mounted on the second guide rods via a second guide sleeve; the elastic component is a plurality of springs arranged between the outer bottom surface of the sealing box and the frame along the mold closing direction.

[0013] In a preferred embodiment, the mold closing drive device includes the motor, the reducer, the transmission screw, and a plurality of the first guide rods that are sequentially connected and installed with the transmission screw and arranged along the mold closing direction; the second template and the cover plate are fixed to the first guide rods, and the cover plate is installed on the frame through the guide rail pair arranged along the mold closing direction.

[0014] In a preferred embodiment, the frame is a rectangular frame with an integrally formed structure, and the first template and the second template are respectively arranged on opposite sides of the frame.

[0015] The beneficial effects of this utility model are as follows: when the first and second mold plates are closed, the cover plate closes the sealing box to form a sealed cavity. Air is then evacuated and filled with protective gas, eliminating oxidation conditions within the cavity. This reduces the risk of oxidation damage to the molds heated during production, extending the mold life and reducing production costs. The sealing box and cover plate are slidably mounted, ensuring they can close at all closing strokes. The elastic component cushions the impact of the closing between the sealing box and cover plate, ensuring a tight connection between them. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 Schematic diagram of the overall structure of the hot pressing molding machine in Example 1;

[0018] Figure 2 This is a schematic diagram of the installation structure of one side of the second template in Example 1;

[0019] Figure 3 This is a schematic structural diagram of one side of the first template in Example 1;

[0020] Figure 4 It is a vertical cross-sectional diagram of the overall structure of the hot pressing forming machine in Example 2. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] It should be noted that the words indicating directions in this application document, such as back, inside, outside, etc., are only for the convenience of a more intuitive description of the structure in combination with the drawings, and are not intended to limit the product structure.

[0023] Example 1:

[0024] refer to Figures 1 to 3As shown, a hot press molding machine according to this embodiment includes a frame 1, a first mold plate 2 fixedly mounted at the first end of the frame 1, a high-frequency heating ring 3 corresponding to the outer periphery of the first mold plate 2, a second mold plate 4 movably mounted at the second end of the frame 1 and opposite the first mold plate 2, and a mold closing drive 5 for driving the second mold plate 4 toward the first mold plate 2 to close the mold. The frame 1 is a rectangular frame with an integral mold structure, and the first mold plate 2 and the second mold plate 4 are disposed on opposite sides of the frame 1. A sealing box 6 with an opening facing the second mold plate 4 is also provided on the exterior of the first mold plate 2. A cover plate 7 driven by the mold closing drive 5 and capable of sealingly covering the opening of the sealing box 6 is also provided on the side of the second mold plate 4 away from the first mold plate 2. The sealing box 6 is also provided with an air inlet 8a and an air exhaust 8b for charging a protective gas. The cover plate 7 is slidably mounted along the mold closing direction, and an elastic component 9 is provided on the outer side of the cover plate 7 along the mold closing direction.

[0025] During operation, the sheet to be formed is placed into the mold cavity of the second mold plate 4. The mold closing drive device 5 drives the second mold plate 4 to rise until it covers the first mold plate 2. At this time, the cover plate 7 is also sealed with the sealing ring to form a sealed cavity. The air in the sealed cavity is extracted through the exhaust hole 8b and the air inlet hole 8a and filled with protective gas. At the same time, the first mold plate 2 and the second mold plate 4 are heated by the high-frequency heating ring 3. After the sheet is softened and cooled to form, the mold closing drive device 5 drives the second mold plate 4 to return to its original position, completing a production cycle. The frame 1 adopts an integrated rectangular frame structure, which not only has higher structural reliability, but also makes the spacing and position between the first mold plate 2 and the second mold plate 4 less likely to change, thereby improving molding accuracy. When the first mold plate 2 and the second mold plate 4 are closed, the cover plate 7 covers the sealing box 6 to form a sealed cavity. Then, by extracting air and filling it with protective gas, the internal environment lacks oxidation conditions, thereby making the mold heated during the production process less likely to be oxidized and damaged, extending the mold service life and thus reducing production costs. The cover plate 7 is slidably installed to ensure that the two can be covered at different mold closing strokes, and the elastic component 9 can buffer the mold closing impact force between the sealing box 6 and the cover plate 7 and make the two tightly combined.

[0026] A preferred solution, the mold closing drive device 5 of this embodiment includes a motor 51, a reducer 52, a transmission screw 53 connected in sequence, and a plurality of first guide rods 54 that are installed in transmission with the transmission screw 53 and arranged along the mold closing direction; the back of the second template 4 is fixed to the first guide rod 54, and also includes a mounting plate 55 that is parallel and spaced apart and is arranged on the back of the second template 4 and is fixed on the first guide rod 54, and the mounting plate 55 is installed on the frame 1 through a guide rail pair 56 arranged along the mold closing direction; the cover plate 7 is arranged parallel between the second template 4 and the mounting plate 55, and the cover plate 7 is slidably installed on the first guide rod 54 through a first guide sleeve 71, and the elastic component 9 is arranged between the cover plate 7 and the mounting plate 55; the sealing box 6 is fixedly installed on the frame 1. During operation, the rotational power of the motor 51 is transmitted to the transmission screw 53 through the reducer 52, so as to drive the second template 4 to move back and forth along the mold closing direction through the first guide rod 54, and the stability of the mold closing is ensured by the mounting plate 55 and the guide rail pair 56. The cover plate 7 is slidably installed on the first guide rod 54. When the mold is closed, the cover plate 7 is retreated to ensure that the cover plate 7 and the sealing box 6 are tightly combined.

[0027] In a preferred embodiment, the guide rail pair 56 of this embodiment comprises two groups, one at each end of the mounting plate 55. A support 551 is also provided at each end of the mounting plate 55 for mounting with the guide rail pair 56. The elastic assembly 9 is provided between the support 551 and the cover plate 7 and comprises a plurality of springs distributed along the length of the support 551. The support 551 ensures installation space between the cover plate 7 and the mounting plate 55. The supports 551 at each end of the mounting plate 55 ensure that the elastic assembly 9 provides uniform pressing force on the cover plate 7.

[0028] In a preferred embodiment, the sealing box 6 of this embodiment is fixedly mounted on the frame 1, and a first through-hole is formed on a side wall of the sealing box 6. The sealing box 6 also includes a mounting base 10 covering the first through-hole, and the high-frequency heating ring 3 is fixedly mounted on the mounting base 10. By covering the first through-hole with the mounting base 10 and mounting the high-frequency heating ring 3, thermal insulation materials can be saved, the sealing box 6 can be protected, and equipment costs can be reduced.

[0029] In a preferred embodiment, the mounting base 10 of this embodiment includes a first plate 101 covering the first through-hole, a second through-hole defined in the center of the first plate 101, and a second plate 102 covering the second through-hole. The first plate 101 has first elongated slots 1011 defined at its four corners along the Z-axis, and the first plate 101 is secured to the sidewall of the sealing box 6 via screws passing through the first elongated slots 1011. The second plate 102 has second elongated slots 1021 defined at its four corners along the X-axis, and the second plate 102 is secured to the first plate 101 via screws passing through the second elongated slots 1021. The high-frequency heating ring 3 is fixed to the second plate 102. By adjusting the position of the first plate 101 along the Z-axis and the second plate 102 along the X-axis, the position of the high-frequency heating ring 3 can be adjusted, thereby achieving optimal heating effects and adapting to different molds.

[0030] In a preferred embodiment, the sidewalls of the sealing box 6 of this embodiment have first guide bars 103 arranged parallel to the Z axis on both sides of the first plate 101. A first adjustment screw 104 is also threadedly mounted on the sidewalls of the sealing box 6, driving the first plate 101 to move along the Z axis between the two first guide bars 103. The sidewalls of the first plate 101 have second guide bars 105 arranged parallel to the X axis on both sides of the second plate 102. A second adjustment screw 106 is also threadedly mounted on the first plate 101, driving the second plate 102 to move along the X axis between the two second guide bars 105. The position of the high-frequency heating ring 3 can be adjusted by rotating the first and second adjustment screws 104, 106, making adjustment more convenient.

[0031] Example 2:

[0032] refer to Figure 4 As shown, a thermoforming machine of this embodiment differs from the thermoforming machine of the first embodiment in that the sealing box 6 is slidably mounted, while the cover plate 7 is fixed relative to the second template 4. Specifically, the first template 2 is fixedly mounted on the frame 1 via a plurality of second guide rods 21 on its back side along the mold closing direction, while the bottom surface of the sealing box 6 is slidably mounted on the second guide rods 21 via second guide sleeves 61. The elastic components 9 are a plurality of springs disposed between the outer bottom surface of the sealing box 6 and the frame 1 along the mold closing direction.

[0033] Since the cover plate 7 is fixedly arranged relative to the second template 4, the specific installation structure on one side of the second template 4 is as follows: the mold closing drive device 5 includes the motor 51, the reducer 52, the transmission screw 53 connected in sequence, and a plurality of first guide rods 54 installed in transmission with the transmission screw 53 and arranged along the mold closing direction; the second template 4 and the cover plate 7 are fixed to the first guide rods 54, and the cover plate 7 is installed on the frame 1 through the guide rail pair 56 arranged along the mold closing direction.

[0034] The above description does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A hot press forming machine for hot bending and forming curved panels, characterized by: The invention comprises a frame, a first template fixedly mounted on the first end of the frame, a high-frequency heating ring corresponding to the outer periphery of the first template, a second template movably mounted on the second end of the frame and opposite to the first template, and a mold closing drive device for driving the second template to move toward the first template to close the mold; the first template is also covered with a sealing box with an opening facing the second template, and the second template is further provided with a cover driven by the mold closing drive device and capable of sealing with the opening of the sealing box on the side away from the first template, and the sealing box is also provided with an air inlet and an air exhaust hole for filling with protective gas; the sealing box or the cover is slidably mounted along the mold closing direction, and an elastic component is provided on the outer side of the sliding sealing box or the cover along the mold closing direction.

2. A hot pressing forming machine according to claim 1, characterized in that: The mold closing drive device includes a motor, a reducer, a transmission screw connected in sequence, and a plurality of first guide rods installed in transmission with the transmission screw and arranged along the mold closing direction; the back of the second template is fixed to the first guide rod, and also includes a mounting plate arranged parallel and at intervals on the back of the second template and fixed on the first guide rod, and the mounting plate is mounted on the frame through a guide rail pair arranged along the mold closing direction; the cover plate is arranged parallel between the second template and the mounting plate, and the cover plate is slidably installed on the first guide rod through a first guide sleeve, and the elastic component is arranged between the cover plate and the mounting plate; the sealing box is fixedly mounted on the frame.

3. A hot pressing forming machine according to claim 2, characterized in that: The guide rail pair includes two groups respectively arranged at both ends of the mounting plate, and the two ends of the mounting plate are respectively provided with supports mounted with the guide rail pair. The elastic component is arranged between the support and the cover plate and is a plurality of springs distributed along the length direction of the support.

4. The hot pressing forming machine according to claim 2, characterized in that: The sealing box is fixedly mounted on the frame, and a first through hole is opened on one side wall of the sealing box. The sealing box also includes a mounting base covering the first through hole, and the high-frequency heating ring is fixedly mounted on the mounting base.

5. The hot pressing forming machine according to claim 4, characterized in that: The mounting base includes a first plate covering the first through hole, a second through hole opened in the center of the first plate, and a second plate covering the second through hole; the first plate is provided with a first long groove along the Z-axis at the four corners, and the first plate is locked to the side wall of the sealing box by a screw passing through the first long groove; the second plate is provided with a second long groove along the X-axis at the four corners, and the second plate is locked to the first plate by a screw passing through the second long groove; and the high-frequency heating ring is fixed to the second plate.

6. The hot pressing forming machine according to claim 5, characterized in that: The side wall of the sealing box has first guide strips arranged parallel to the first plate along the Z axis, and a first adjusting screw is threadedly installed on the side wall of the sealing box to drive the first plate to move along the Z axis between the two first guide strips.

7. The hot pressing forming machine according to claim 5, characterized in that: The side wall of the first plate has second guide strips arranged parallel to the X-axis on both sides of the second plate, and the first plate is also threadedly mounted with a second adjusting screw that drives the second plate to move between the two second guide strips along the X-axis.

8. The hot pressing forming machine according to claim 1, characterized in that: The first template is fixedly mounted on the frame via a plurality of second guide rods along the mold closing direction on the back side, and the bottom surface of the sealing box is slidably mounted on the second guide rods via a second guide sleeve; the elastic component is a plurality of springs arranged between the outer bottom surface of the sealing box and the frame along the mold closing direction.

9. The hot pressing forming machine according to claim 8, characterized in that: The mold closing drive device includes a motor, a reducer, a transmission screw connected in sequence, and a plurality of first guide rods that are installed in transmission with the transmission screw and arranged along the mold closing direction; the second template and the cover plate are fixed to the first guide rods, and the cover plate is installed on the frame through a guide rail pair arranged along the mold closing direction.

10. The hot pressing forming machine according to claim 1, characterized in that: The frame is a rectangular frame with an integrally formed structure, and the first template and the second template are respectively arranged on two opposite sides of the frame.

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