Improved hot press molding equipment

Abstract

The utility model provides improved hot-press forming equipment which is used for hot bending forming of curved plates and comprises a plurality of supporting tables arranged in sequence and forming die assemblies sequentially moving among the supporting tables. A high-frequency heating assembly is correspondingly arranged above the first supporting table, electric heating pressing plate assemblies for providing forming pressure and supplementary heating are correspondingly arranged above the second supporting table and the third supporting table respectively, and liquid cooling pressing plate assemblies for providing forming pressure and cooling are correspondingly arranged above the fourth supporting table and the fifth supporting table respectively. According to the equipment, the heating and cooling processes are divided into a plurality of steps, and continuous stepping production can be realized, so that the production efficiency is improved; the high-frequency heating assembly is firstly used for rapid preheating, then the two sets of electric heating pressing plate assemblies are used for gradually heating to the set temperature, and the pressure is kept, so that it is guaranteed that the quality is not affected due to the too fast heating process when the curved plate is formed, the heating process is obviously shortened, the oxidation damage speed of the forming die assembly is reduced, and then the production cost is reduced.

Description

Technical Field

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

[0002] With the development of various mobile phones with curved screens or curved back covers on the market, corresponding products such as curved screen glass, or curved back covers and curved protective films made of thermoplastic materials such as PC and PET have appeared. These products are formed by hot pressing sheets through hot pressing molds. During the hot pressing process of the product, the product needs to be heated to a certain temperature through the mold to soften it, and then shaped by the mold pressure, and then the mold pressure is maintained for a certain period of time to cool and shape it, and finally the mold is opened and taken out.

[0003] The Chinese utility model patent with the authorization announcement number CN217622147U applied by the applicant discloses a soft film hot pressing device. The principle is to set the soft film in the film pressing mechanism, and transfer the film pressing mechanism to the heating mechanism and cooling mechanism in sequence along the working direction of the assembly line to heat and cool the soft film. The soft film does not need to be taken out during the processing, which can avoid problems such as deformation and shrinkage rebound during the soft film molding. However, in the actual use of this equipment, since the soft film is usually made of materials such as PC, if the heating temperature is too fast, it will cause the shape of the soft film to be unstable or even damaged. Therefore, electric heating is used to gradually heat the mold. However, this heating method not only leads to a long heating and cooling time, reducing production efficiency, but also, when the mold of the film pressing mechanism is heated to a higher temperature, the longer the time, the faster the mold is oxidized and damaged, and the mold of the film pressing mechanism needs to be replaced frequently, resulting in high production costs. Therefore, it is necessary to improve it. Utility Model Content

[0004] The utility model aims to provide a hot pressing forming device with high production efficiency and longer mold service life.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An improved hot pressing forming equipment, used for hot bending and forming curved panels, includes a plurality of support tables arranged in sequence along a processing direction, and a forming die assembly for forming the curved panel, which moves in sequence between the plurality of support tables along the processing direction; along the processing position distribution direction, a high-frequency heating assembly for heating the forming die assembly is arranged above the corresponding first support table, an electric heating plate assembly for providing forming pressure and supplementary heating to the forming die assembly is arranged above the corresponding second and third support tables, respectively, and a liquid-cooled plate assembly for providing forming pressure and cooling to the forming die assembly is arranged above the corresponding fourth and fifth support tables, respectively.

[0007] In a preferred embodiment, a plurality of first electric heating rods are embedded in the second and third support platforms, and the two groups of electric heating platen assemblies include a first platen, a first cylinder assembly for driving the first platen to press down, and a plurality of second electric heating rods embedded in the first platen.

[0008] In a preferred embodiment, a plurality of first liquid cooling pipes are embedded in the fourth and fifth support platforms, and the two groups of liquid-cooled pressure plate assemblies include a second pressure plate, a second cylinder assembly for driving the second pressure plate to press down, and a plurality of second liquid cooling pipes embedded in the second pressure plate.

[0009] In a preferred embodiment, the high-frequency heating assembly includes a high-frequency ring whose inner contour is larger than that of the forming die assembly, and a third cylinder assembly for driving the high-frequency ring to rise and fall.

[0010] A preferred solution is that several of the support tables are distributed along a straight line, and the top surfaces are located on the same horizontal plane, and also includes a stepping pushing device that enables the forming mold assembly to move in sequence between the support tables along the processing position distribution direction. The stepping pushing device includes a mounting rod arranged along the processing position distribution direction, a rotating driving assembly that drives the mounting rod to rotate around the axis, a plurality of shifting rods corresponding to the positions on both sides of each support table and fixed vertically on the mounting rod, and a push plate driving assembly that integrally drives the mounting rod and the rotating driving assembly to move forward and backward in steps along the processing position distribution direction.

[0011] In a preferred embodiment, the molding equipment also includes a material changing table parallel to the front side of each support table and flush with the top surface of the support table, a loading pushing component for pushing the molding mold assembly from the material changing table to the first support table, and a unloading pushing component for pushing the molding mold assembly on the rearmost support table to the material changing table.

[0012] A preferred solution is that the material changing table is also provided with a material changing pushing assembly for pushing the molding die assembly along its front and rear directions, and a mold opening device for opening and closing the molding die assembly, the mold opening device comprising a clamping jaw assembly for clamping the upper mold plate of the molding die assembly, and a mold opening driving assembly for driving the clamping jaw assembly to rise and fall.

[0013] The beneficial effects of the utility model are as follows: a group of high-frequency heating components and two groups of electric heating platen components are arranged, and then at least two groups of liquid-cooled platen components are arranged, so that the heating and cooling processes of the forming mold components are divided into multiple steps, and continuous step-by-step production can be achieved through multiple forming mold components, thereby significantly improving the production efficiency; as for the heating part, the forming mold components are first quickly preheated by the high-frequency heating components, and then the curved panel is gradually heated to the set temperature and the pressure is maintained by the two groups of electric heating platen components, which not only ensures that the quality of the curved panel is not affected by the overly fast heating process during molding, but also significantly shortens the heating process, reduces the oxidation damage rate of the forming mold components, thereby reducing the production cost and further improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 The overall structure of the hot pressing molding equipment in the embodiment is shown in FIG. Figure 1 ;

[0016] Figure 2 The overall structure of the hot pressing molding equipment in the embodiment is shown in FIG. Figure 2 ;

[0017] Figure 3 It is a structural view of the first to sixth processes in the embodiment;

[0018] Figure 4 It is a structural schematic diagram of the stepping propulsion device in the embodiment;

[0019] Figure 5 It is a structural schematic diagram of the material changing station in the embodiment. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] It should be noted that the words indicating directions in the present application document, such as top surface, bottom surface, vertical direction, 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.

[0022] refer to Figures 1 to 5As shown, an improved hot pressing forming equipment is used for hot bending forming curved panels, including a plurality of support platforms 1 arranged in sequence along a processing direction, and a forming die assembly 2 for forming curved panels which moves in sequence between the plurality of support platforms 1 along the processing direction; along the processing position distribution direction, a high-frequency heating assembly 3 for heating the forming die assembly 2 is arranged above the corresponding first support platform 1, an electric heating plate assembly 4 for providing forming pressure and supplementary heating to the forming die assembly 2 is arranged above the corresponding second and third support platforms 1, and a liquid-cooled plate assembly 5 for providing forming pressure and cooling to the forming die assembly 2 is arranged above the corresponding fourth, fifth and sixth support platforms 1.

[0023] During production, the panel sheet to be formed is placed in the mold cavity of the forming mold assembly 2, and then enters the first support platform 1 with the forming mold assembly 2. The corresponding high-frequency heating assembly 3 above quickly preheats the forming mold assembly 2, and then the forming mold assembly 2 enters the second and third support platforms 1 in turn, and is electrically heated and pressurized by the electric heating platen assembly 4 to achieve the set forming stability and pressure. Then, the forming mold assembly 2 enters the fourth, fifth and sixth support platforms 1 in turn, and is cooled and pressured by the liquid-cooled platen assembly 5 to complete cooling and shaping. Finally, the formed curved panel can be taken out. A group of high-frequency heating components 3 and two groups of electric heating platen components 4 are arranged, and then at least two groups of liquid-cooled platen components 5 are arranged, and the heating and cooling process of the forming mold component 2 is divided into multiple steps. Continuous step-by-step production can be achieved through multiple forming mold components 2, thereby significantly improving the production efficiency; as for the heating part, the forming mold component 2 is first quickly preheated by the high-frequency heating component 3, and then the curved plate is gradually heated to the set temperature and the pressure is maintained by the two groups of electric heating platen components 4, which not only ensures that the quality of the curved plate is not affected by the too fast heating process during molding, but also significantly shortens the heating process, reduces the oxidation damage rate of the forming mold component 2, thereby reducing the production cost and further improving the production efficiency.

[0024] A preferred solution is that the second and third support platforms 1 of this embodiment are embedded with a plurality of first electric heating rods 11, and the two groups of electric heating platen assemblies 4 include a first platen 41, a first cylinder assembly 42 for driving the first platen 41 to press down, and a plurality of second electric heating rods 43 embedded in the first platen 41. The first cylinder assembly 42 is usually composed of a sliding pair formed by a cylinder and a plurality of guide pins and guide sleeves. When working, the first cylinder assembly 42 drives the first platen 41 to press down to the top surface of the forming mold assembly 2, and the first platen 41 and the support platform 1 provide pressure for the forming mold assembly 2, and then the first electric heating rod 11 and the second electric heating rod 43 conduct heat to the forming mold assembly 2 to soften and shape the panel; wherein, the first heating rod and the second heating rod can be realized by other forms of electric heating elements, such as resistance heating wire, electric heating film, electric heating tube, etc.; and the assembly driving the first platen 41 to press down can also be realized by a motor or a hydraulic power unit, which is the prior art.

[0025] A preferred solution is that the fourth, fifth and sixth support platforms 1 of this embodiment are embedded with a plurality of first liquid cooling pipes 12, and the two groups of liquid cooling platen assemblies 5 include a second platen 51, a second cylinder assembly 52 for driving the second platen 51 to press down, and a plurality of second liquid cooling pipes 53 embedded in the second platen 51. The second cylinder assembly 52 is usually composed of a sliding pair formed by a cylinder and a plurality of guide pins and guide sleeves. When working, the second cylinder assembly 52 drives the second platen 51 to press down to the top surface of the forming mold assembly 2, and the second platen 51 and the support platform 1 provide pressure for the forming mold assembly 2, and then the first liquid cooling pipe 12 and the second liquid cooling pipe 53 cool and shape the panel in the forming mold assembly 2; wherein, the first liquid cooling pipe 12 and the second liquid cooling pipe 53 can use existing conventional refrigerants such as water and cooling oil; and the assembly for driving the second platen 51 to press down can also be realized by a motor or a hydraulic power unit, which is a prior art.

[0026] A preferred solution, the high-frequency heating assembly 3 of this embodiment includes a high-frequency ring 31 whose inner contour is larger than the molding die assembly 2, and a third cylinder assembly 32 for driving the high-frequency ring 31 to rise and fall. The third cylinder assembly 32 is generally composed of a sliding pair formed by a cylinder and a plurality of guide pins and guide sleeves, wherein the cylinder can also be replaced by a motor or a hydraulic power unit, which is a prior art.

[0027] A preferred solution is that the several support platforms 1 of this embodiment are distributed along a straight line, and the top surfaces are located on the same horizontal plane, and also include a stepping pushing device 6 that enables the forming mold assembly 2 to move in sequence between the support platforms 1 along the processing position distribution direction, the stepping pushing device 6 includes a mounting rod 61 arranged along the processing position distribution direction, a rotating driving assembly 62 that drives the mounting rod 61 to rotate around the axis, a plurality of shifting rods 63 corresponding to the positions on both sides of each support platform 1 and fixed vertically on the mounting rod 61, and a push plate driving assembly 64 that integrally drives the mounting rod 61 and the rotating driving assembly 62 to move forward and backward in steps along the processing position distribution direction. Among them, the rotary drive assembly 62 can be driven by a rotary cylinder or a motor, and the push plate drive assembly 64 can also realize stepping linear movement by a stepping motor or a cylinder as a power unit. The above-mentioned driving structures are all existing conventional technologies and will not be repeated; when working, the rotary drive assembly 62 drives each lever 63 to rotate between two adjacent molding die assemblies 2, and then drives the push plate to step forward through the push plate drive assembly 64, so as to push each molding die assembly 2 forward to the next station. Each molding die assembly 2 is moved forward in steps by the stepping push device 6, with a high degree of automation and precise moving position, which can ensure more uniform heating and cooling of the molding die assembly 2. In other embodiments, the molding die assembly 2 can also be moved manually or with the help of existing automation devices such as manipulators.

[0028] A preferred solution, the molding equipment of this embodiment also includes a material change table 7 parallel to the front side of each support table 1 and flush with the top surface of the support table 1, pushing the molding die assembly 2 from the material change table 7 to the loading push component 71 of the first support table 1, and pushing the molding die assembly 2 on the last support table 1 to the unloading push component 72 of the material change table 7. Among them, the loading push component 71 and the unloading push component 72 can be realized by driving the push plate through the existing linear mechanism, which belongs to the prior art and will not be repeated; when working, the panel to be formed is placed in the molding die assembly 2 on one side of the material change table 7, and then pushed to the first support table 1 at one end of the material change table 7 by the loading push component 71. After the molding of the curved panel is completed, the molding die assembly 2 is pushed back from the last support table 1 to the other end of the material change table 7 by the unloading push component 72 to facilitate the removal of the curved panel. The operator can perform loading and unloading operations on one side of the material change table 7, which is safer, and the molding die assembly 2 automatically moves up and down the support table 1, with a higher degree of automation.

[0029] A preferred solution is that the material changing table 7 of this embodiment is also provided with a material changing pushing assembly 73 for pushing the molding die assembly 2 along its front and rear directions, and a mold opening device 74 for opening and closing the molding die assembly 2, the mold opening device 74 includes a clamping jaw assembly 741 for clamping the upper mold plate of the molding die assembly 2, and a mold opening driving assembly 742 for driving the clamping jaw assembly 741 to rise and fall. Among them, the material change push component 73 can be realized by driving the push plate through the existing linear mechanism, which is the existing technology and will not be repeated; when working, the upper template of the forming mold component 2 is opened by the clamping claw component 741 of the mold opening device 74, and the operator puts the panel sheet to be formed into the mold cavity of the forming mold component 2, and then the material change push component 73 pushes the forming mold component 2 to the loading end of the material change table 7, and then the material loading push component 71 pushes the forming mold component 2 to the first support table 1, and after the molding is completed in sequence, it is pushed back to the forming mold component 2 at the unloading end of the material change table 7 by the unloading push component 72, and is pushed again to the bottom of the mold opening device 74 by the material change push component 73, and the upper template is opened by the clamping claw component 741, and the operator takes out the curved panel to complete a production cycle. The operator only needs to put in the panel sheet and take out the curved panel, and the degree of automation is high.

[0030] 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. An improved hot press forming equipment for hot bending and forming curved panels, characterized in that: It includes a plurality of support tables arranged in sequence along a processing direction, and a forming mold assembly for forming a curved panel which moves in sequence between the plurality of support tables along the processing direction; along the processing position distribution direction, a high-frequency heating assembly for heating the forming mold assembly is arranged above the corresponding first support table, an electric heating platen assembly for providing forming pressure and supplementary heating to the forming mold assembly is arranged above the corresponding second and third support tables, and a liquid-cooled platen assembly for providing forming pressure and cooling to the forming mold assembly is arranged above the corresponding fourth and fifth support tables.

2. An improved hot pressing forming device according to claim 1, characterized in that: A plurality of first electric heating rods are embedded in the second and third support platforms, and the two sets of electric heating platen assemblies include a first platen, a first cylinder assembly for driving the first platen to press down, and a plurality of second electric heating rods embedded in the first platen.

3. An improved hot pressing forming device according to claim 1, characterized in that: A plurality of first liquid cooling pipes are embedded in the fourth and fifth support platforms, and the two groups of liquid cooling platen assemblies include a second platen, a second cylinder assembly for driving the second platen to press downward, and a plurality of second liquid cooling pipes embedded in the second platen.

4. An improved hot pressing forming device according to claim 1, characterized in that: The high-frequency heating component includes a high-frequency ring whose inner contour is larger than that of the forming die component, and a third cylinder component for driving the high-frequency ring to rise and fall.

5. An improved hot pressing forming device according to claim 1, characterized in that: Several of the support tables are distributed along a straight line, and the top surfaces are located on the same horizontal plane. It also includes a stepping pushing device that enables the forming mold assembly to move in sequence between the support tables along the processing position distribution direction. The stepping pushing device includes a mounting rod arranged along the processing position distribution direction, a rotating driving assembly that drives the mounting rod to rotate around the axis, a number of shifting rods corresponding to the positions on both sides of each support table and fixed vertically on the mounting rod, and a push plate driving assembly that integrally drives the mounting rod and the rotating driving assembly to move forward and backward in steps along the processing position distribution direction.

6. An improved hot pressing forming device according to claim 5, characterized in that: The molding equipment also includes a material changing table parallel to the front side of each support table and flush with the top surface of the support table, a loading pushing component that pushes the molding mold assembly from the material changing table to the first support table, and a unloading pushing component that pushes the molding mold assembly on the rearmost support table to the material changing table.

7. An improved hot pressing forming device according to claim 6, characterized in that: The material changing table is also provided with a material changing pushing assembly for pushing the forming mold assembly along its front and rear directions, and a mold opening device for opening and closing the forming mold assembly, wherein the mold opening device comprises a clamping jaw assembly for clamping the upper mold plate of the forming mold assembly, and a mold opening driving assembly for driving the clamping jaw assembly to rise and fall.

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