A hot pressing machine

Abstract

The present invention discloses a hot pressing molding machine. Through the design of a special vacuum cover structure, the air between the mold cavity and the product can be extracted under the premise that the left and right molds are not completely closed and the airbag fixing plate has not sealed the opening on the mold. At the same time, the patch capsule is eliminated and the prepreg is pasted on the pressurized airbag, thereby reducing the pressure loss and obtaining a higher quality product.

Description

Technical Field

[0001] The invention relates to composite material processing equipment, in particular to a hot pressing molding machine. Background Art

[0002] Hot pressing is one of the commonly used methods in the processing industry. Because the mold cavity is closed during the molding process and completely isolated from the outside world, the degree of air removal between the product and the mold during the molding process becomes one of the key factors affecting product quality. In the composite helmet industry, the traditional hot pressing molding process is to first put the patch capsule into the mold cavity, then close the mold, lower the contracted pressurized airbag into the patch capsule and seal the upper surface of the mold. At this time, the mold cavity is completely closed and isolated from the atmosphere. Then, pressurized air is injected into the pressurized airbag to hot press and shape the product. In order to improve product quality, some equipment has added a mold vacuuming function. In order to ensure the neatness of the product surface, the air extraction hole can only be arranged at the waste edge of the product neck; due to the small gap between the patch capsule, the composite prepreg and the inner wall of the mold cavity, it is relatively easy to extract the air at the waste edge of the neck, but it is difficult to remove the air from other parts. Therefore, the air extraction method of the existing hot pressing molding machine is not effective, which makes the product prone to defects such as bubbles or pinholes, lack of glue, etc., affecting product quality. Summary of the invention

[0003] The technical problem to be solved by the present invention is: a hot pressing molding machine is needed, which can better extract the air between the mold cavity and the product during hot pressing molding.

[0004] The solution of the present invention to solve its technical problem is: a hot pressing molding machine, comprising a frame, a guide column is arranged on the frame in a horizontal direction, and a left vacuum cover and a right vacuum cover are arranged on the guide column at intervals along the length direction of the guide column, the left vacuum cover is connected with a left driving cylinder, and the left driving cylinder drives the left vacuum cover to move back and forth along the length direction of the guide column, the right side surface of the left vacuum cover is provided with a left cavity, the top surface of the left vacuum cover is provided with a first opening, the first opening is communicated with the left cavity, the right vacuum cover is provided with a right driving cylinder, the right driving cylinder drives the right vacuum cover to move back and forth along the length direction of the guide column, the left side surface of the right vacuum cover is provided with a right cavity, the top surface of the right vacuum cover is provided with a second opening, the second opening is communicated with the right cavity, When the empty cover abuts against the right vacuum cover, the first opening and the second opening form an upper opening; a molding mold is arranged between the left cavity and the right cavity, a molding cavity is arranged in the molding mold, an airbag lifting cylinder and a cover plate lifting cylinder are arranged on the frame, an airbag fixing device is arranged on the airbag lifting cylinder, an airbag is arranged on the bottom side of the airbag fixing device, the airbag lifting cylinder drives the airbag fixing device to move up and down in a vertical direction, when the airbag fixing device moves downward to the end of the stroke, the airbag fixing device sends the airbag into the molding cavity; a sealing cover plate is arranged on the cover plate lifting cylinder, the cover plate lifting cylinder drives the sealing cover plate to move up and down in a vertical direction, when the sealing cover plate moves downward to the end of the stroke, the sealing cover plate seals the upper opening.

[0005] As a further improvement of the above technical solution, an auxiliary support seat is arranged on the frame, and a plurality of auxiliary support wheels are arranged on the bottom sides of the left vacuum cover and the right vacuum cover, and the auxiliary support wheels move back and forth on the auxiliary support seat along the length direction of the guide column.

[0006] As a further improvement of the above technical solution, a height-adjusting screw rod is connected to the frame, and the auxiliary support seat is height-adjusted on the height-adjusting screw rod.

[0007] As a further improvement of the above technical solution, the molding mold includes a left mold and a right mold arranged along the length direction of the guide column, the left mold is arranged in the left cavity, and the right mold is arranged in the right cavity. The molding cavity is formed when the left mold and the right mold are combined, and a left locking cylinder and a right locking cylinder are arranged on the frame. The output end of the left locking cylinder drives the left mold to move back and forth along the length direction of the guide column, and the output end of the right locking cylinder drives the right mold to move back and forth along the length direction of the guide column.

[0008] As a further improvement of the above technical solution, a left sealed bearing seat is arranged on the left vacuum hood, the output end of the left locking cylinder passes through the left sealed bearing seat, a left supporting guide wheel is arranged at the bottom of the left sealed bearing seat, a left supporting seat is arranged on the frame, and the left supporting guide wheel moves back and forth on the left supporting seat along the length direction of the guide column, a right sealed bearing seat is arranged on the right vacuum hood, the output end of the right locking cylinder passes through the right sealed bearing seat, a right supporting guide wheel is arranged at the bottom of the right sealed bearing seat, and a right supporting seat is arranged on the frame, and the right supporting guide wheel moves back and forth on the right supporting seat along the length direction of the guide column.

[0009] As a further improvement of the above technical solution, the airbag fixing device includes an airbag fixing plate and a positioning frame arranged on the bottom surface of the airbag fixing plate. The outer wall of the positioning frame is surrounded by a card slot, and the airbag is buckled in the card slot without the need to lock the airbag.

[0010] The beneficial effects of the present invention are as follows: a hot pressing molding machine is provided. Before operation, an airbag with a prepreg cloth is first hung on an airbag fixing plate of an airbag fixing device. The airbag is in a free state before entering the mold for pressurization. The airbag descends into the molding cavity. The molding cavity performs a mold closing action but does not close. A 10-20mm spacing is left between the fractal surface and a 10-20mm spacing is left between the airbag fixing plate and the upper plane of the mold. The left driving cylinder and the right driving cylinder are used to drive the left vacuum cover and the right vacuum cover to close each other respectively. The first opening and the second opening form an upper opening. The sealing cover plate descends to the upper opening position and puts the vacuum cover in a sealed state. At this time, the vacuum cover is isolated from the atmosphere, but the mold has not yet been closed. The air in the vacuum cover can be removed by negative pressure, and then the mold is closed. The airbag fixing device The device descends into place and closes the molding cavity, and the composite material is molded and shaped in the molding cavity by pressurizing the inner cavity of the airbag. Then, the airbag is shrunk by negative pressure, the sealing cover plate moves up, the left vacuum cover and the right vacuum cover are synchronously separated and opened, the airbag fixing device moves up, and the airbag in a contracted state moves upward out of the molding mold along with the airbag fixing device. At this time, the molding cavity is opened, the product is taken out, the airbag breaks the vacuum, and the airbag is removed, completing a production cycle. Therefore, by using the present invention, the use of the patch capsule is eliminated, the composite material is attached to the pressurized airbag, the pressure loss is reduced, and the air between the molding cavity and the product is completely extracted in advance when the molding mold is not closed, thereby eliminating the possibility of bubbles or pinholes, glue shortage and other problems in the product, and the product quality is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for use in the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0012] Figure 1 It is a structural schematic diagram of the left vacuum cover and the right vacuum cover of the present invention when they are separated;

[0013] Figure 2 It is a structural schematic diagram of the left vacuum cover and the right vacuum cover of the present invention when they are against each other;

[0014] Figure 3 It is a schematic structural diagram of the airbag fixing device of the present invention;

[0015] Figure 4 yes Figure 3 Schematic diagram of the AA section structure.

[0016] In the accompanying drawings: 1-frame, 2-left vacuum cover, 3-right vacuum cover, 4-airbag fixing device, 5-sealing cover plate, 6-auxiliary support seat, 7-auxiliary support wheel, 8-left mold, 9-right mold, 12-left sealed bearing seat, 13-left support guide wheel, 14-right sealed bearing seat, 15-right support guide wheel, 16-left support seat, 17-right support seat, 18-guide column. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. In addition, all the connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connecting accessories according to the specific implementation situation. The various technical features in the invention can be combined interchangeably without conflicting with each other.

[0018] Reference Figure 1 , Figure 2A hot pressing molding machine comprises a frame 1, a guide column 18 is arranged on the frame 1 in the horizontal direction, a left vacuum cover 2 and a right vacuum cover 3 are arranged on the guide column 18 at intervals along the length direction of the guide column, the left vacuum cover 2 and the right vacuum cover 3 are respectively connected to the guide column 18 through bearing seats, the left vacuum cover 2 is connected to a left driving cylinder, the left driving cylinder drives the left vacuum cover 2 to move back and forth along the length direction of the guide column 18, a left cavity is arranged on the right side surface of the left vacuum cover 2, a first opening is arranged on the top surface of the left vacuum cover 2, the first opening is communicated with the left cavity, a right driving cylinder is arranged on the right vacuum cover 3, the right driving cylinder drives the right vacuum cover 3 to move back and forth along the length direction of the guide column 18, a right cavity is arranged on the left side surface of the right vacuum cover 3, a second opening is arranged on the top surface of the right vacuum cover 3, the second opening is communicated with the right cavity They are interconnected, and when the left vacuum cover 2 and the right vacuum cover 3 are against each other, the first opening and the second opening form an upper opening; a molding mold is arranged between the left cavity and the right cavity, and a molding cavity is arranged in the molding mold; an airbag lifting cylinder and a cover plate lifting cylinder are arranged on the frame 1, and an airbag fixing device 4 is arranged on the airbag lifting cylinder, and an airbag is arranged on the bottom side of the airbag fixing device 4, and the airbag lifting cylinder drives the airbag fixing device 4 to move up and down in the vertical direction, and when the airbag fixing device 4 moves downward to the end of the stroke, the airbag fixing device 4 sends the airbag into the molding cavity; a sealing cover plate 5 is arranged on the cover plate lifting cylinder, and the cover plate lifting cylinder drives the sealing cover plate 5 to move up and down in the vertical direction, and when the sealing cover plate 5 moves downward to the end of the stroke, the sealing cover plate 5 seals the upper opening.

[0019] As can be seen from the above, a hot pressing molding machine is provided. Before working, the airbag with the prepreg cloth is first hung on the airbag fixing plate of the airbag fixing device 4. The airbag is in a free state before entering the mold for pressurization. The airbag descends into the molding cavity, and the molding cavity performs a mold closing action but does not close. The fractal surface leaves a spacing of 10-20mm, and the airbag fixing plate leaves a spacing of 10-20mm from the upper plane of the mold. The left driving cylinder and the right driving cylinder are used to drive the left vacuum cover 2 and the right vacuum cover 3 to close each other respectively, and the first opening and the second opening form an upper opening. The sealing cover plate 5 descends to the upper opening position and makes the vacuum cover in a sealed state. At this time, the vacuum cover is isolated from the atmosphere, but the mold has not yet been closed. At this time, the air in the vacuum cover can be removed by negative pressure, and then the mold is closed, and the airbag The fixing device 4 descends into place and closes the molding cavity, and the composite material is molded and shaped in the molding cavity by pressurizing the inner cavity of the airbag. Then, the airbag is contracted by negative pressure, and the sealing cover plate 5 moves up. The left vacuum cover 2 and the right vacuum cover 3 are separated and opened synchronously, and the airbag fixing device 4 moves up. The airbag in a contracted state moves upward out of the molding mold. At this time, the molding cavity is opened, the product is taken out, the airbag breaks the vacuum, and the airbag is removed, completing a production cycle. Therefore, the use of the present invention eliminates the use of patch capsules, and the composite material is attached to the pressurized airbag, which reduces pressure loss. In addition, the air between the molding cavity and the product is completely evacuated in advance before the molding mold is closed, eliminating the possibility of bubbles or pinholes, glue shortage, and other problems in the product, and the product quality is more stable.

[0020] In order to improve the stability of the connection structure between the left driving cylinder, the right driving cylinder and the left vacuum cover 2, the right vacuum cover 3 respectively, an auxiliary support seat 6 is arranged on the frame 1, and a plurality of auxiliary support wheels 7 are arranged on the bottom sides of the left vacuum cover 2 and the right vacuum cover 3. The auxiliary support wheels 7 move back and forth on the auxiliary support seat 6 along the length direction of the guide column to ensure the stable operation and reliable sealing of the vacuum cover.

[0021] In some embodiments, a height adjustment screw is provided on the frame 1, and the auxiliary support seat 6 is adjusted in height by the height adjustment screw. The height adjustment screw drives the auxiliary support seat 6 to adjust up and down in a direction perpendicular to the guide rail. The height adjustment screw is electrically driven and can adjust the position of the auxiliary support seat 6 to form a reliable support for the left vacuum cover 2 and the right vacuum cover 3.

[0022] In some embodiments, the molding die includes a left mold 8 and a right mold 9 arranged along the length direction of the guide column 18, the left mold 8 is arranged in the left cavity, and the right mold 9 is arranged in the right cavity. When the left mold 8 and the right mold 9 are molded together, the molding cavity is formed. The frame 1 is provided with a left clamping oil cylinder and a right clamping oil cylinder. The output end of the left clamping oil cylinder drives the left mold 8 to move back and forth along the length direction of the guide column 18, and the output end of the right clamping oil cylinder drives the right mold 9 to move back and forth along the length direction of the guide column 18. The left clamping oil cylinder and the right clamping oil cylinder are fixed on the frame 1, and are connected to the left mold 8 and the right mold 9 through their output ends, i.e., piston rods, respectively, and drive the left mold 8 and the right mold 9 to move along the length direction of the guide column respectively.

[0023] In some embodiments, a left sealed bearing seat 12 is provided on the left vacuum hood 2, the output end of the left locking cylinder passes through the left sealed bearing seat 12, a left supporting guide wheel 13 is provided at the bottom of the left sealed bearing seat 12, a left supporting seat 16 is provided on the frame 1, and the left supporting guide wheel 13 moves back and forth on the left supporting seat 16 along the length direction of the guide column 18, a right sealed bearing seat 14 is provided on the right vacuum hood 3, the output end of the right locking cylinder passes through the right sealed bearing seat 14, a right supporting guide wheel 15 is provided at the bottom of the right sealed bearing seat 14, a right supporting seat 17 is provided on the frame 1, and the right supporting guide wheel 15 moves back and forth on the right supporting seat 17 along the length direction of the guide column 18. The output end of the left clamping cylinder and the output end of the right clamping cylinder pass through the left vacuum cover 2 and the right vacuum cover 3 respectively. The left vacuum cover 2 and the right vacuum cover 3 can support the output end of the left clamping cylinder and the output end of the right clamping cylinder, making the overall structure more stable. The left supporting guide wheel 13 and the right supporting guide wheel 15 also support the output end of the left clamping cylinder and the output end of the right clamping cylinder, further improving the stability of the overall structure.

[0024] In some embodiments, the airbag fixing device 4 includes an airbag fixing plate and a positioning frame arranged on the bottom surface of the airbag fixing plate. The outer wall of the positioning frame is surrounded by a card slot. When installing the airbag, it is only necessary to insert the neck part of the airbag into the card slot for hanging. No additional clamping and fixing mechanism is required to clamp and fix the airbag, which makes disassembly and assembly more convenient.

[0025] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A thermoforming machine, characterized in that: The invention comprises a frame (1), wherein a guide column (18) is arranged on the frame (1) in a horizontal direction, and a left vacuum cover (2) and a right vacuum cover (3) are arranged on the guide column (18) at intervals along the length direction of the guide column, and the left vacuum cover (2) is connected to a left drive cylinder, and the left drive cylinder drives the left vacuum cover (2) to move back and forth along the length direction of the guide column (18), and the right side surface of the left vacuum cover (2) is provided with a left cavity, and the top surface of the left vacuum cover (2) is provided with a first opening, and the first opening is communicated with the left cavity, and the right vacuum cover (3) is provided with a right drive cylinder, and the right drive cylinder drives the right vacuum cover (3) to move back and forth along the length direction of the guide column (18), and the left side surface of the right vacuum cover (3) is provided with a right cavity, and the top surface of the right vacuum cover (3) is provided with a second opening, and the second opening is communicated with the right cavity, and the left vacuum cover (2) is provided with a right drive cylinder. When abutting against the right vacuum cover (3), the first opening and the second opening form an upper opening; a molding mold is arranged between the left cavity and the right cavity, a molding cavity is arranged in the molding mold, an airbag lifting cylinder and a cover plate lifting cylinder are arranged on the frame (1), an airbag fixing device (4) is arranged on the airbag lifting cylinder, an airbag is arranged on the bottom side of the airbag fixing device (4), the airbag lifting cylinder drives the airbag fixing device (4) to move up and down in the vertical direction, when the airbag fixing device (4) moves downward to the end of the stroke, the airbag fixing device (4) sends the airbag into the molding cavity; a sealing cover plate (5) is arranged on the cover plate lifting cylinder, the cover plate lifting cylinder drives the sealing cover plate (5) to move up and down in the vertical direction, when the sealing cover plate (5) moves downward to the end of the stroke, the sealing cover plate (5) seals the upper opening.

2. A thermoforming machine according to claim 1, characterized in that: An auxiliary support seat (6) is arranged on the frame (1), and a plurality of auxiliary support wheels (7) are arranged on the bottom sides of the left vacuum cover (2) and the right vacuum cover (3), and the auxiliary support wheels (7) move back and forth on the auxiliary support seat (6) along the length direction of the guide column.

3. A thermoforming machine according to claim 2, characterized in that: The frame (1) is connected to a height-adjusting screw rod, and the auxiliary support seat (6) is height-adjusted on the height-adjusting screw rod.

4. A thermoforming machine according to claim 1, characterized in that: The molding die comprises a left die (8) and a right die (9) which are arranged along the length direction of the guide column (18); the left die (8) is arranged in the left cavity; the right die (9) is arranged in the right cavity; the molding cavity is formed when the left die (8) and the right die (9) are molded together; a left mold locking cylinder and a right mold locking cylinder are arranged on the frame (1); the output end of the left mold locking cylinder drives the left die (8) to move back and forth along the length direction of the guide column (18); the output end of the right mold locking cylinder drives the right die (9) to move back and forth along the length direction of the guide column (18).

5. A thermoforming machine according to claim 4, characterized in that: The left vacuum cover (2) is provided with a left sealed bearing seat (12), the output end of the left mold locking cylinder passes through the left sealed bearing seat (12), the bottom of the left sealed bearing seat (12) is provided with a left support guide wheel (13), the frame (1) is provided with a left support seat (16), the left support guide wheel (13) moves back and forth on the left support seat (16) along the length direction of the guide column (18), the right vacuum cover (3) is provided with a right sealed bearing seat (14), the output end of the right mold locking cylinder passes through the right sealed bearing seat (14), the bottom of the right sealed bearing seat (14) is provided with a right support guide wheel (15), the frame (1) is provided with a right support seat (17), the right support guide wheel (15) moves back and forth on the right support seat (17) along the length direction of the guide column (18).

6. A thermoforming machine according to claim 1, characterized in that: The airbag fixing device (4) comprises an airbag fixing plate and a positioning frame arranged on the bottom surface of the airbag fixing plate. The outer side wall of the positioning frame is surrounded by a clamping groove, and the airbag is buckled in the clamping groove.

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