Plastic suction mold with temperature control function

Abstract

The utility model relates to a plastic uptake mould with a temperature control function, which comprises a mould shell, a forming template is fixedly mounted in the mould shell, a plurality of through holes are formed in the forming template, a sealing and fixing structure is mounted at the top of the mould shell, and an air exhaust hood is fixedly connected to the bottom end of the mould shell. A pipeline connector rotationally connected with the air exhaust cover is arranged on the outer wall of one end of the air exhaust cover in a penetrating mode, a temperature sensor is fixedly installed on the lower surface of the forming template and used for detecting the temperature of a plastic plate above the forming template, the temperature is displayed in real time through a display screen installed on the controller, and an electric heating wire is installed in the position, below the temperature sensor, in the mold shell. When the temperature of the plastic plate above the forming template is too low, a user can electrify the electric heating wire through the controller to heat the forming template, heat is conducted to the plastic plate through the forming template to heat the plastic plate, and the problems that the temperature of the plastic plate is too low, plasticity is reduced, and forming of the plastic plate is affected are solved as much as possible.

Description

Technical Field

[0001] This utility model belongs to the field of thermoforming mold technology, specifically relating to a thermoforming mold with temperature control function. Background Technology

[0002] A vacuum forming mold is a type of mold used in conjunction with a vacuum forming machine. During production, the mold is placed on the upper iron plate of the vacuum chamber. Then, according to the size of the mold, a plastic sheet is cut to the appropriate size. The plastic sheet is then placed on a constant temperature oven for softening treatment. The softened plastic sheet is placed on the mold in the vacuum chamber, and the suction switch is turned on. Through the densely spaced suction holes on the mold, the air between the mold and the plastic sheet is sucked out. Under the action of air pressure, the softened plastic sheet is fully adhered to the surface of the mold. After the plastic sheet cools, a product identical to the mold is obtained.

[0003] Existing vacuum forming molds generally do not have temperature control functions. When producing products through vacuum forming molds in cold weather, the plastic sheet will cool down rapidly after being placed on the mold, which will reduce the plasticity of the plastic sheet. Vacuum forming under these conditions may result in poor adhesion between the plastic sheet and the mold, affecting the quality of the product. Utility Model Content

[0004] The purpose of this utility model is to provide a simple and reasonably designed thermoforming mold with temperature control function in order to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A thermoforming mold with temperature control function includes a mold shell, a forming template fixedly installed inside the mold shell, multiple through holes on the forming template, a sealing and fixing structure installed on the top of the mold shell, and a vacuum hood fixedly connected to the bottom of the mold shell. A pipe joint rotatably connected to the vacuum hood is passed through the outer wall of one end of the vacuum hood. A temperature sensor for detecting the temperature of the forming template is fixedly installed on the bottom wall of the forming template. Multiple sets of heating wires are installed in the inner cavity of the mold shell below the temperature sensor. A controller is fixedly installed on the outer wall of the vacuum hood away from the pipe joint. The heating wires and the temperature sensor are electrically connected to the controller. A display screen for displaying the temperature detected by the temperature sensor is also installed on the controller.

[0007] As a further optimization of this utility model, the sealing and fixing structure includes a lower sealing plate with a rectangular frame structure fixedly installed at the top of the mold shell, and an upper sealing plate above the lower sealing plate for pressing with the lower sealing plate.

[0008] As a further optimization of this utility model, mounting brackets are installed on the outer walls of the front and rear sides of the mold shell. A cylinder is fixedly connected to the top of the mounting bracket. A piston rod is installed on the output end of the cylinder. The end of the piston rod away from the cylinder passes through the mounting bracket and is slidably connected to the mounting bracket. The bottom end of the piston rod is fixed to the upper surface of the upper sealing plate.

[0009] As a further optimization of this utility model, the exhaust hood has a rectangular box-shaped structure, the bottom of the exhaust hood is sealed, and the height of the top of the exhaust hood is lower than the height of the bottom of the heating wire.

[0010] As a further optimization of this utility model, the pipe joint has an external thread at one end located outside the exhaust hood, and a handle is fixedly fitted at the connection between the pipe joint and the exhaust hood.

[0011] As a further optimization of this utility model, a gap is left between the heating wire and the inner wall of the mold shell, and a ceramic support is provided in the gap. One end of the ceramic support is fixed to the inner wall of the mold shell, and the other end of the ceramic support is sleeved on the heating wire and fixed to the heating wire.

[0012] The beneficial effects of this utility model are as follows: A temperature sensor is fixedly installed on the lower surface of the molding template to detect the temperature of the plastic sheet above the molding template, and the temperature is displayed in real time on the display screen installed on the controller. An electric heating wire is installed in the mold shell below the temperature sensor. When the temperature of the plastic sheet above the molding template is too low, the user can turn on the electric heating wire through the controller to heat the molding template, and the heat is conducted to the plastic sheet through the molding template to heat the plastic sheet, so as to avoid the problem of the plastic sheet temperature being too low, the plasticity decreasing, and affecting the molding of the plastic sheet. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure at one end of this utility model;

[0014] Figure 2 This is a schematic diagram of the other end of the overall structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0016] Figure 4 This is a utility model Figure 3 Enlarged view of a close-up detail at point A in the middle;

[0017] Figure 5 This is a schematic diagram of the installation position of the temperature sensor of this utility model.

[0018] In the diagram: 1. Mold shell; 2. Molding template; 3. Through hole; 4. Lower sealing plate; 5. Mounting bracket; 6. Cylinder; 7. Piston rod; 8. Upper sealing plate; 9. Evacuation hood; 10. Pipe joint; 11. Tightening handle; 12. Heating wire; 13. Ceramic bracket; 14. Temperature sensor; 15. Controller; 16. Display screen. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] Example

[0021] like Figure 1 - Figure 5 As shown, a thermoforming mold with temperature control function includes a mold shell 1, a forming template 2 fixedly installed inside the mold shell 1, and a plurality of through holes 3 on the forming template 2. The through holes 3 are used to connect the cavity above the forming template 2 with the cavity below the forming template 2. When air is sucked from below the forming template 2, the air can enter from above the forming template 2 to below the forming template 2 through the through holes 3.

[0022] A sealing and fixing structure is installed on the top of the mold shell 1. The sealing and fixing structure includes a lower sealing plate 4 with a rectangular frame structure fixedly installed on the top of the mold shell 1. An upper sealing plate 8 is provided above the lower sealing plate 4 for pressing with the lower sealing plate 4. Mounting brackets 5 are installed on the outer walls of the front and rear sides of the mold shell 1. A cylinder 6 is fixedly connected to the top of the mounting bracket 5. A piston rod 7 is installed on the output end of the cylinder 6. The end of the piston rod 7 away from the cylinder 6 passes through the mounting bracket 5 and is slidably connected to the mounting bracket 5. The bottom end of the piston rod 7 is fixed to the upper surface of the upper sealing plate 8. When the heated and softened plastic sheet is overlapped on the lower sealing plate 4, the cylinder 6 can be activated to drive the piston rod 7 to extend and push the upper sealing plate 8 to move down, so as to seal and fix the plastic sheet to the top of the mold shell 1 in conjunction with the lower sealing plate 4.

[0023] A vacuum hood 9 is fixedly connected to the bottom of the mold shell 1. The vacuum hood 9 has a rectangular box-shaped structure and the bottom of the vacuum hood 9 is sealed. A pipe joint 10 is rotatably connected to the vacuum hood 9 on the outer wall of one end of the vacuum hood 9. The pipe joint 10 is externally threaded at the end outside the vacuum hood 9. A handle 11 is fixedly fitted at the connection between the pipe joint 10 and the vacuum hood 9. After the plastic sheet is fixed to the top of the mold shell 1, the vacuum pipe of the external vacuum pump can be connected to the vacuum hood 9 through the pipe joint 10. The vacuum pump is used to extract air. At this time, the air in the cavity above the forming template 2 is extracted from the through hole 3, so that the heated plastic sheet is bonded to the upper surface of the forming template 2 under negative pressure. After the plastic sheet cools down, it can be vacuum-formed into a product.

[0024] A temperature sensor 14 for detecting the temperature of the molding template 2 is fixedly installed on the bottom wall of the molding template 2. Multiple sets of heating wires 12 are installed in the inner cavity of the mold shell 1 below the temperature sensor 14. A gap is left between the heating wires 12 and the inner wall of the mold shell 1. A ceramic support 13 is installed in the gap. One end of the ceramic support 13 is fixed to the inner wall of the mold shell 1, and the other end of the ceramic support 13 is sleeved on the heating wires 12 and fixed to the heating wires 12, so as to fix multiple sets of heating wires 12 in the mold shell 1 below the molding template 2.

[0025] The top of the exhaust hood 9 is lower than the bottom of the heating wire 12, which can minimize the overheating of the exhaust hood 9 after the heating wire 12 is energized.

[0026] A controller 15 is fixedly installed on the outer wall of the exhaust hood 9 on the side away from the pipe joint 10. The heating wire 12 and the temperature sensor 14 are both electrically connected to the controller 15. The controller 15 is also equipped with a display screen 16 for displaying the temperature detected by the temperature sensor 14. The display screen 16 can display the bottom temperature of the molding template 2 in real time. When the bottom temperature of the molding template 2 is too low, the user can turn on the heating wire 12 through the controller 15 to heat the molding template 2 and conduct the heat to the plastic sheet through the molding template 2, so as to avoid the problem of the plastic sheet being too cold, reducing plasticity, and affecting the molding of the plastic sheet.

[0027] It should be noted that, in the use of this temperature-controlled thermoforming mold, the heated and softened plastic sheet is first placed around the lower sealing plate 4, and the cylinder 6 is activated to extend the piston rod 7, pushing the upper sealing plate 8 downward. This, together with the lower sealing plate 4, seals and fixes the plastic sheet around the top of the mold shell 1. At this point, the external vacuum pump's extraction pipe can be connected to the extraction hood 9 through the pipe connector 10. The vacuum pump extracts air, causing the air in the cavity above the forming template 2 to be extracted through the through hole 3. This allows the heated plastic sheet to adhere to the upper surface of the forming template 2 under negative pressure. A temperature sensor 14 is fixedly installed on the lower surface of the forming template 2 to detect the temperature of the plastic sheet above the forming template 2. The temperature is displayed in real time on the display screen 16 installed on the controller 15. When the temperature of the plastic sheet above the forming template 2 is too low, the user can energize the heating wire 12 through the controller 15 to heat the forming template 2. The heat is then transferred to the plastic sheet through the forming template 2, thus preventing the plastic sheet from becoming too cold, reducing its plasticity, and affecting the forming process.

[0028] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A thermoforming mold with temperature control function, comprising a mold shell (1), wherein a forming template (2) is fixedly installed inside the mold shell (1), the forming template (2) has multiple through holes (3), and a sealing and fixing structure is installed on the top of the mold shell (1), characterized in that: A vacuum hood (9) is fixedly connected to the bottom of the mold shell (1). A pipe joint (10) rotatably connected to the vacuum hood (9) is provided on the outer wall of one end of the vacuum hood (9). A temperature sensor (14) for detecting the temperature of the molding template (2) is fixedly installed on the bottom wall of the molding template (2). Multiple sets of heating wires (12) are installed in the inner cavity of the mold shell (1) below the temperature sensor (14). A controller (15) is fixedly installed on the outer wall of the vacuum hood (9) away from the pipe joint (10). The heating wires (12) and the temperature sensor (14) are electrically connected to the controller (15). A display screen (16) for displaying the temperature detected by the temperature sensor (14) is also installed on the controller (15).

2. The thermoforming mold with temperature control function according to claim 1, characterized in that: The sealing and fixing structure includes a lower sealing plate (4) with a rectangular frame structure fixedly installed at the top of the mold shell (1), and an upper sealing plate (8) is provided above the lower sealing plate (4) for pressing against the lower sealing plate (4).

3. A thermoforming mold with temperature control function according to claim 2, characterized in that: Mounting brackets (5) are installed on the outer walls of the front and rear sides of the mold shell (1). A cylinder (6) is fixedly connected to the top of the mounting bracket (5). A piston rod (7) is installed on the output end of the cylinder (6). The end of the piston rod (7) away from the cylinder (6) passes through the mounting bracket (5) and is slidably connected to the mounting bracket (5). The bottom end of the piston rod (7) is fixed to the upper surface of the upper sealing plate (8).

4. A thermoforming mold with temperature control function according to claim 1, characterized in that: The exhaust hood (9) has a rectangular box-shaped structure. The bottom of the exhaust hood (9) is sealed, and the top of the exhaust hood (9) is lower than the bottom of the heating wire (12).

5. A thermoforming mold with temperature control function according to claim 4, characterized in that: The pipe joint (10) is provided with an external thread at one end outside the air extraction hood (9), and a screwdriver (11) is fixedly fitted at the connection between the pipe joint (10) and the air extraction hood (9).

6. A thermoforming mold with temperature control function according to claim 1, characterized in that: A gap is provided between the heating wire (12) and the inner wall of the mold shell (1), and a ceramic support (13) is provided in the gap. One end of the ceramic support (13) is fixed to the inner wall of the mold shell (1), and the other end of the ceramic support (13) is sleeved on the heating wire (12) and fixed to the heating wire (12).

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