Blister mold for inner container of refrigeration equipment

Abstract

The utility model relates to the inner bag suction mold of refrigeration equipment, including the lower mould base and the vacuum pump of installation in the lower mould base bottom end, the upper mould base is buckled on the lower mould base, the inner top portion of upper mould base is fixedly connected with the limiting frame, the limiting frame is rectangular frame for pressing the plastic plate material of heating, the top end fixedly connected with the shaft coupling of upper mould base, the middle fixedly connected with the air valve of lower mould base, the air valve is used to control the air circulation to the air pressure balance of upper mould seat inside, the middle of lower mould base is equipped with mould groove, the middle of lower mould base is equipped with exhaust hole. The utility model discloses through several push boards cooperation improves the stability of inner bag positioning support, through pressure sensor and air cylinder cooperation, real -time measurement push board support on the pressure of inner bag side wall, through the power output of adjusting air cylinder, thereby keep support pressure in reasonable threshold F1, through the elastic deformation of cushion layer improves pressure sensor and inner bag support area, reduces local pressure, improves the security of inner bag demoulding.

Description

Technical Field

[0001] This utility model relates to the field of vacuum forming mold technology, specifically to a vacuum forming mold for the inner liner of refrigeration equipment. Background Technology

[0002] The vacuum forming mold for the inner liner of refrigeration equipment is a special tooling mold designed for the internal storage liner of refrigeration equipment such as refrigerators and freezers. It is mostly made of ABS or HIPS plastic. The inner liner of refrigeration equipment is manufactured in one piece through vacuum forming process. Its core function is to ensure the forming accuracy and surface quality of the inner liner and to adapt to the assembly and use requirements of refrigeration equipment. The existing refrigeration equipment's inner liner vacuum forming mold structure revolves around the process of "heating and softening - vacuum adsorption - cooling and shaping - demolding and part removal." Key structures work together: the basic frame provides overall support, using high-strength aluminum alloy, and is equipped with guide pillars, vacuum pump interfaces, and cooling medium inlets and outlets to ensure precise docking and functional connection of each component; the detachable cavity module is the core of the forming process, with the inner wall of the cavity body matching the shape of the inner liner, and the outer side adapting to the basic frame through positioning bosses. In conjunction with the partitioned vacuum components (including multiple independent vacuum chambers and vacuum holes of different diameters), vacuum is drawn sequentially to ensure that the softened plastic sheet fits tightly into the cavity, solving forming defects in deep cavities and corners.

[0003] When the inner liner of existing refrigeration equipment is re-adsorbed, a demolding component is needed to remove the inner liner from the mold. Since the inner liner has just cooled and formed, the demolding component may cause uneven local stress, which may lead to the breakage of thin inner liner plates and wrinkling of thick inner liner plates, thus affecting the safety of demolding. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing vacuum forming mold for the inner liner of refrigeration equipment is prone to uneven stress in some areas of the inner liner during demolding, which leads to the breakage of the thin inner liner sheet and the wrinkling of the thick inner liner sheet, thus affecting the safety of demolding.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A vacuum forming mold for the inner liner of a refrigeration equipment includes a lower mold base and a vacuum pump installed at the bottom of the lower mold base. An upper mold base is fastened to the lower mold base. A limit frame is fixedly connected to the inner top of the upper mold base. The limit frame is a rectangular frame used to press the heated plastic sheet. A coupling is fixedly connected to the top of the upper mold base. An air valve is fixedly connected to the middle of the lower mold base. The air valve is used to control the airflow into the upper mold base to balance the air pressure. A mold groove is opened in the middle of the lower mold base. There is an exhaust port, the other end of which passes through the lower mold base. The other end of the exhaust port is connected to a pipe and is connected to the negative pressure port of the exhaust port. Several cylinders are symmetrically installed on the upper part of the lower mold base. The output end of each cylinder is fixedly connected to a push plate. The top of each push plate is fixedly connected to a pad. A pressure sensor is installed in the middle of each push plate. A slot is opened in the middle of the pad for the pressure sensor to deform. The pressure sensor is used to detect the pressure of the push plate supported on the inner liner. The pressure sensor can send a signal to the cylinder control unit and control the cylinder drive.

[0006] The beneficial effects of this utility model are: the stability of the inner liner positioning support is improved by the cooperation of several push plates; the pressure of the push plate support on the inner liner side wall is measured in real time by the cooperation of pressure sensor and cylinder; the support pressure is kept within a reasonable threshold F1 by adjusting the power output of cylinder; and the support area between pressure sensor and inner liner is improved by the elastic deformation of pad layer, reducing local pressure and improving the safety of inner liner demolding.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, several mounting slots are provided on the lower mold base, and the cylinders are fixedly connected to the bottom of the mounting slots respectively.

[0009] Furthermore, each cylinder output end is fixedly connected to a damper, and the other end of each damper is fixedly connected to the bottom end of the push plate. Springs are fixedly wound around the outer surface of each damper, which improves the stability of the push plate support.

[0010] Furthermore, a first sealing ring is snapped onto the cylinder, and the external dimensions of the first sealing ring are adapted to the internal dimensions of the mounting groove.

[0011] Furthermore, a water channel is opened in the middle of the lower mold base. The water channel is distributed in an S-shape and is used for the flow of condensate. The side wall of the lower mold base is equipped with a water inlet and a water outlet, which are connected to the two ends of the water channel respectively.

[0012] Furthermore, a slot is provided on the lower mold base for the upper mold base to engage with. A second sealing ring is fitted on the outer surface of the lower mold base near the slot to improve the sealing performance of the connection between the lower mold base and the upper mold base.

[0013] Furthermore, mounting ears are fixedly connected at the four corners of the lower mold base, and threaded holes are opened on the surface of the mounting ears, which improves the stability of the lower mold base installation.

[0014] Furthermore, a filter canister is installed at the other end of the air valve, and a filter element is installed in the middle of the filter canister to filter impurities in the air, improving the safety of air entering the upper mold base.

[0015] The beneficial effect of adopting the above-mentioned further solution is that by setting up a damper and a spring, when the pressure measured by the pressure sensor exceeds the critical value M1, the spring is compressed and deformed, thereby reducing the pressure value of the pressure sensor and improving the safety of the push plate support. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic cross-sectional view of the overall structure of this utility model; Figure 4 This is a schematic diagram of the push plate structure of this utility model; Figure 5 This is a schematic diagram of the lower mold base structure of this utility model; The attached diagram lists the components represented by each number as follows: 1. Lower mold base; 2. Upper mold base; 3. Vacuum pump; 4. Coupling; 5. Air valve; 6. Mounting lug; 7. Mold groove; 8. Exhaust hole; 9. Filter canister; 10. Slot; 11. Cylinder; 12. Push plate; 13. Pad layer; 14. Pressure sensor; 15. Water channel; 16. Limit frame; 17. Damper; 18. Spring; 19. First sealing ring; 20. Mounting groove; 21. Second sealing ring; 22. Water inlet; 23. Water outlet. Detailed Implementation

[0017] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0018] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0019] like Figure 1-5 As shown, the inner liner vacuum forming mold of the refrigeration equipment includes a lower mold base 1 and a vacuum pump 3 installed at the bottom of the lower mold base 1. An upper mold base 2 is fastened to the lower mold base 1. A limit frame 16 is fixedly connected to the inner top of the upper mold base 2. The limit frame 16 is a rectangular frame used to press the heated plastic sheet. A coupling 4 is fixedly connected to the top of the upper mold base 2. The coupling 4 is used to connect a power output device. An air valve 5 is fixedly connected to the middle of the lower mold base 1. The air valve 5 is used to control the airflow into the upper mold base 2 to balance the air pressure. A filter canister 9 is installed at the other end of the air valve 5. A filter element is installed in the middle of the filter canister 9 to filter impurities in the air. A mold groove 7 is opened in the middle of the lower mold base 1. An exhaust hole 8 is opened in the middle of the lower mold base 1. The other end of the exhaust hole 8 passes through the lower mold base 1. A pipe is inserted into the other end of the exhaust hole 8 and is connected to the negative pressure port of the exhaust hole 8. Symmetrically mounted on the upper part of the lower mold base 1... There are several cylinders 11, and each cylinder 11 has a push plate 12 fixedly connected to its output end. Each push plate 12 has a pad 13 fixedly connected to its top end. Each push plate 12 has a pressure sensor 14 installed in the middle. The pad 13 has a slot in the middle for the pressure sensor 14 to deform. The pressure sensor 14 is used to detect the pressure of the push plate 12 supported on the inner liner. The pressure sensor 14 can send a signal to the control unit of the cylinder 11 and control the drive of the cylinder 11. The stability of the inner liner positioning support is improved by the cooperation of several push plates 12. By cooperating with the pressure sensor 14 and the cylinder 11, the pressure of the push plate 12 supported on the side wall of the inner liner is measured in real time. By adjusting the power output of the cylinder 11, the support pressure is kept within a reasonable threshold F1. The elastic deformation of the pad 13 increases the support area between the pressure sensor 14 and the inner liner, reduces local pressure, and improves the safety of the inner liner demolding.

[0020] The lower mold base 1 has several mounting slots 20. Cylinders 11 are fixedly connected to the bottom of the mounting slots 20. The output end of each cylinder 11 is fixedly connected to a damper 17. The other end of each damper 17 is fixedly connected to the bottom of the push plate 12. Springs 18 are fixedly wound on the outer surface of each damper 17. By setting up dampers 17 and springs 18, when the pressure measured by the pressure sensor 14 exceeds the critical value M1, the springs 18 are compressed and deformed, thereby reducing the pressure value of the pressure sensor 14, thereby improving the safety of the push plate 12 support. A first sealing ring 19 is snapped onto the cylinder 11. The external dimensions of the first sealing ring 19 are adapted to the internal dimensions of the mounting slot 20. The first sealing ring 19 is used to seal the mounting slot 20, thereby reducing the deformation of the inner liner inside the mounting slot 20.

[0021] A water channel 15 is provided in the middle of the lower mold base 1. The water channel 15 is for the circulation of condensate. The water channel 15 is S-shaped to increase the contact area between the cooling water and the lower mold base 1. A water inlet 22 and a water outlet 23 are installed on the side wall of the lower mold base 1. The water inlet 22 and the water outlet 23 are respectively connected to the two ends of the water channel 15. The water inlet 22 and the water outlet 23 can be connected to pipes and connected to a water pump. When the water pump is started, cold water can be drawn into the water channel 15 to cool and shape the vacuum-formed inner liner. The lower mold base 1 has a slot 10 for the upper mold base 2 to engage. A second sealing ring 21 is fitted on the outer surface of the lower mold base 1 near the slot 10 to improve the sealing of the connection between the lower mold base 1 and the upper mold base 2. Mounting ears 6 are fixedly connected at the four corners of the lower mold base 1, and threaded holes are opened on the surface of the mounting ears 6.

[0022] Working principle: When using the inner liner vacuum forming mold of this refrigeration equipment, the operator first installs the lower mold base 1 and the upper mold base 2 in the designated positions. Then, the heated plastic sheet is placed on the top of the lower mold base 1 by connecting an external power supply. The upper mold base 2 is then fastened onto the lower mold base 1. The limiting frame 16 presses down on the edge of the supporting sheet, improving the sealing of the mold groove 7. The vacuum pump 3 is then started to evacuate the mold groove 7, causing the heated sheet to indent into the mold groove 7 under air pressure. The water pump is then started to circulate cold water in the water tank 15 to cool and plasticize the formed inner liner. Finally, the upper mold base 2 is removed and the limiting frame is released. The inner liner is limited, and then the cylinder 11 is activated to push the push plate 12 to move. The pressure sensor 14 detects the pressure of the push plate 12 supported on the inner liner. The pressure sensor 14 sends a signal to the control unit of the cylinder 11 and controls the drive of the cylinder 11. The pressure sensor 14 and the cylinder 11 work together to measure the pressure of the push plate 12 supported on the side wall of the inner liner in real time. By adjusting the power output of the cylinder 11, the pressure of the push plate 12 is kept within a reasonable threshold F1. The elastic deformation of the pad layer 13 increases the support area between the pressure sensor 14 and the inner liner, reduces local pressure, and improves the safety of the inner liner demolding.

[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vacuum forming mold for the inner liner of a refrigeration equipment, characterized in that: The device includes a lower mold base (1) and a vacuum pump (3) installed at the bottom of the lower mold base (1). An upper mold base (2) is fastened to the lower mold base (1). A limit frame (16) is fixedly connected to the inner top of the upper mold base (2). The limit frame (16) is a rectangular frame used to press the heated plastic sheet. A coupling (4) is fixedly connected to the top of the upper mold base (2). An air valve (5) is fixedly connected to the middle of the lower mold base (1). The air valve (5) is used to control the airflow into the upper mold base (2) to balance the air pressure. A mold groove (7) is opened in the middle of the lower mold base (1). An exhaust hole (8) is opened in the middle of the lower mold base (1). The other end of the exhaust hole (8) passes through the lower mold base (1). The other end of the exhaust hole (8) is connected to a pipe and is connected to the negative pressure port of the exhaust hole (8). Several cylinders (11) are symmetrically installed on the upper part of the lower mold base (1). The output end of each cylinder (11) is fixedly connected to a push plate (12). The top of each push plate (12) is fixedly connected to a pad (13). A pressure sensor (14) is installed in the middle of each push plate (12). A slot is opened in the middle of the pad (13) for the pressure sensor (14) to deform. The pressure sensor (14) is used to detect the pressure of the push plate (12) supported on the inner liner. The pressure sensor (14) can send a signal to the control unit of the cylinder (11) and control the drive of the cylinder (11).

2. The vacuum forming mold for the inner liner of the refrigeration equipment according to claim 1, characterized in that, The lower mold base (1) has several mounting slots (20), and the cylinders (11) are fixedly connected to the bottom of the mounting slots (20).

3. The vacuum forming mold for the inner liner of the refrigeration equipment according to claim 2, characterized in that, The output end of the cylinder (11) is fixedly connected to a damper (17), and the other end of the damper (17) is fixedly connected to the bottom end of the push plate (12). The outer surface of the damper (17) is fixedly wrapped with a spring (18).

4. The vacuum forming mold for the inner liner of the refrigeration equipment according to claim 2, characterized in that, A first sealing ring (19) is snapped onto the cylinder (11), and the external dimensions of the first sealing ring (19) are adapted to the internal dimensions of the mounting groove (20).

5. The vacuum forming mold for the inner liner of the refrigeration equipment according to claim 1, characterized in that, A water channel (15) is opened in the middle of the lower mold base (1). The water channel (15) is S-shaped and is used for the flow of condensate. A water inlet (22) and a water outlet (23) are installed on the side wall of the lower mold base (1). The water inlet (22) and the water outlet (23) are respectively connected to the two ends of the water channel (15).

6. The vacuum forming mold for the inner liner of the refrigeration equipment according to claim 5, characterized in that, A slot (10) is provided on the lower mold base (1), and the upper mold base (2) is engaged in the slot (10). A second sealing ring (21) is fitted on the outer surface of the lower mold base (1) near the slot (10).

7. The vacuum forming mold for the inner liner of the refrigeration equipment according to claim 6, characterized in that, Mounting ears (6) are fixedly connected at the four corners of the lower mold base (1), and threaded holes are opened on the surface of the mounting ears (6).

8. The vacuum forming mold for the inner liner of the refrigeration equipment according to claim 1, characterized in that, A filter canister (9) is installed at the other end of the air valve (5), and a filter element is installed in the middle of the filter canister (9) to filter impurities in the air.

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