Automatic welding die for door seal

Abstract

The utility model discloses an automatic door seal welding die, which comprises an upper die, a lower die I and a lower die II, the lower die II is connected with the lower die I through a fixing seat, the upper die is clamped at the upper end of the lower die I and the upper end of the lower die II, one end face of the lower die is provided with a placing groove, the outer wall of a heat conduction box is fixedly connected with two groups of connecting pipes, and the two groups of connecting pipes are connected with the fixing seat. The two ends of the piston communicate with the interior of the heat conduction cavity, and a driving mechanism for driving the piston to move is installed in the heat conduction box. Through meshing transmission of the rack and the gear of the upper die and linkage of the threaded rod, the sliding block and the piston, the upper die automatically drives a thermal medium to circulate in the opening and closing process, the thermal medium heated by the electric heating wire is pushed by the piston and enters the heat conduction cavity through the connecting pipe, automatic heat supplement is achieved, frequent manual starting of the heating device is avoided during massive welding operation, and the production efficiency is improved. The problem of heat stress concentration caused by repeated heating of a traditional mold is effectively solved, and the risks of cracks and deformation of the mold are remarkably reduced.

Description

Technical Field

[0001] This utility model relates to the field of welding mold technology, and in particular to an automatic welding mold for door seals. Background Technology

[0002] Door seals are mainly used for sealing refrigerators, glass cabinets, display cabinets, disinfection cabinets, fresh air unit cabinets, etc. Door seals need to be welded after cutting before they can be used as finished products.

[0003] In existing technologies, when welding door seals, heat is mostly transferred to the mold through a heating plate to weld the two sets of seals. However, when welding in large quantities, the heat on the mold surface is quickly lost during the placement and removal of the seals. Operators need to frequently start the heating device to repeatedly heat the mold. The frequent heating and cooling process causes the mold to generate large thermal stress under the alternating action of thermal expansion and contraction, resulting in cracks and deformation on the mold surface, accelerating the aging and damage of the mold. Therefore, it is necessary to propose an automatic door seal welding mold to address the above problems. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an automatic welding mold for door seals.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic welding mold for door seals includes an upper mold, a lower mold 1, and a lower mold 2. The lower mold 2 is connected to the lower mold 1 via a fixed base. The upper mold is engaged with the upper ends of the lower mold 1 and the lower mold 2. A placement groove is formed on the end face of the lower mold 1. A positioning element is fixedly connected to the outer wall of the lower mold 2. Both outer walls of the positioning element are in close contact with the inner wall of the placement groove. A glue hole is formed through the upper end of the upper mold. A heat-conducting cavity is formed inside the lower mold 1. A heat-conducting box is fixedly connected to the outer wall of the lower mold 1. Two sets of connecting pipes are fixedly connected to the outer wall of the heat-conducting box, and both ends are connected to the inside of the heat-conducting cavity. A one-way valve is provided in each of the two sets of connecting pipes. An electric heating wire is provided near one end of the heat-conducting box close to the connecting pipe. A piston is movably connected inside the heat-conducting box. A drive mechanism for driving the piston is installed inside the heat-conducting box.

[0007] Preferably, the driving mechanism includes a slider slidably connected inside the heat conduction box, a connecting rod fixedly connected to the outer wall of the slider, and the end of the connecting rod fixedly connected to a piston.

[0008] Preferably, a threaded rod is rotatably connected to the inner wall of the heat-conducting box, the slider is threadedly connected to the threaded section of the threaded rod, and a limit block is fixedly connected to the end of the threaded rod, with the radius of the limit block being larger than the radius of the threaded rod.

[0009] Preferably, a limiting rod is fixedly connected to the inner wall of the heat conduction box, the slider is slidably connected to the outer wall of the limiting rod, and a gear is rotatably connected to the outer wall of the heat conduction box, the gear being coaxially and fixedly connected to the threaded rod.

[0010] Preferably, the lower mold has a fixing groove on its outer wall, the fixing seat is engaged with the outer wall of the fixing groove, and both the inner wall of the fixing groove and the outer wall of the fixing seat are T-shaped.

[0011] Preferably, a rack is fixedly connected to the outer wall of the upper mold, the rack meshes with a gear, and a positioning rod corresponding to the positioning hole is provided on the lower end face of the upper mold.

[0012] This utility model has the following beneficial effects:

[0013] 1. This utility model uses the meshing transmission of the rack and gear of the upper mold to link the threaded rod, slider and piston, so that the opening and closing process of the upper mold is automatically driven to circulate the heat medium. The heat medium heated by the heating wire is pushed by the piston and enters the heat conduction cavity through the connecting pipe to realize automatic heat replenishment. In a large number of welding operations, it avoids the need for frequent manual start of the heating device, effectively solves the problem of thermal stress concentration caused by repeated heating of traditional molds, and significantly reduces the risk of mold cracks and deformation.

[0014] 2. This utility model achieves door seal positioning by utilizing the precise matching of positioning components and placement grooves. Combined with a heat replenishment system consisting of a heat-conducting box, connecting pipe, heat-conducting cavity, and heating wire, it ensures the accuracy of door seal welding position during large-scale welding operations. It also maintains stable mold temperature through circulating heating of the heat medium, reducing the phenomenon of incomplete welding and desoldering caused by insufficient temperature. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an automatic welding mold for door seals proposed in this utility model;

[0016] Figure 2 for Figure 1 Structural diagram.

[0017] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the central heat conduction box.

[0018] In the diagram: 1. Upper mold; 2. Lower mold one; 3. Lower mold two; 4. Placement groove; 5. Heat conduction box; 6. Connecting pipe; 7. Material hole; 8. Positioning rod; 9. Positioning hole; 10. Fixing seat; 11. Fixing groove; 12. Heat conduction cavity; 13. Positioning component; 14. Piston; 15. Threaded rod; 16. Limiting rod; 17. Slider; 18. Connecting rod; 19. Limiting block; 20. Heating wire; 21. Rack; 22. Gear. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-3 An automatic welding mold for door seals includes an upper mold 1, a lower mold 1 2, and a lower mold 2 3. The lower mold 2 3 is connected to the lower mold 1 2 via a fixed base 10. The upper mold 1 is engaged with the upper ends of the lower mold 1 2 and the lower mold 2 3. A placement groove 4 is provided on the end face of the lower mold 1 2. A positioning component 13 is fixedly connected to the outer wall of the lower mold 2 3. Both sides of the outer wall of the positioning component 13 are in contact with the inner wall of the placement groove 4. A glue hole 7 is provided through the upper end of the upper mold 1. A heat conduction cavity 12 is provided inside the lower mold 1 2. A heat conduction box 5 is fixedly connected to the outer wall of the lower mold 1 2. Two sets of connecting pipes 6 are fixedly connected to the outer wall of the heat conduction box 5, and both ends are connected to the inside of the heat conduction cavity 12. A one-way valve is provided in both sets of connecting pipes 6. An electric heating wire 20 is provided at one end of the heat conduction box 5 close to the connecting pipe 6. A piston 14 is movably connected inside the heat conduction box 5. A drive mechanism for driving the piston 14 is installed inside the heat conduction box 5.

[0021] Furthermore, by setting up a heat conduction mechanism consisting of a heat conduction cavity 12, a heat conduction box 5, a connecting pipe 6, and a heating wire 20, heat can be replenished in time when the mold loses heat, avoiding the concentration of thermal stress in the mold due to frequent heating, effectively reducing the occurrence of mold cracks, deformation and other problems, and extending the service life of the mold; the close contact between the positioning part 13 and the placement groove 4 can ensure the precise positioning of the two sets of door seals and improve the accuracy of the welding position of the door seals.

[0022] The driving mechanism includes a slider 17 that is slidably connected inside the heat conduction box 5. A connecting rod 18 is fixedly connected to the outer wall of the slider 17. The end of the connecting rod 18 is fixedly connected to the piston 14. A threaded rod 15 is rotatably connected to the inner wall of the heat conduction box 5. The slider 17 is threadedly connected to the threaded section of the threaded rod 15. A limiting block 19 is fixedly connected to the end of the threaded rod 15, and the radius of the limiting block 19 is larger than the radius of the threaded rod 15.

[0023] Furthermore, through the threaded transmission between the threaded rod 15 and the slider 17, the rotation of the threaded rod 15 can be converted into the linear motion of the slider 17, thereby driving the piston 14 to reciprocate.

[0024] A limiting rod 16 is fixedly connected to the inner wall of the heat conduction box 5, and a slider 17 is slidably connected to the outer wall of the limiting rod 16. A gear 22 is rotatably connected to the outer wall of the heat conduction box 5. The gear 22 is coaxially fixedly connected to the threaded rod 15. A fixing groove 11 is opened on the outer wall of the lower mold 1 2. The fixing seat 10 is engaged with the outer wall of the fixing groove 11. The inner wall of the fixing groove 11 and the outer wall of the fixing seat 10 are both T-shaped. A rack 21 is fixedly connected to the outer wall of the upper mold 1. The rack 21 and the gear 22 mesh with each other. A positioning rod 8 corresponding to the positioning hole 9 is provided on the lower end face of the upper mold 1.

[0025] Furthermore, the meshing transmission between the rack 21 and gear 22 of the upper mold 1 enables the upper mold 1 to synchronously drive the gear 22 to rotate during the opening and closing process, thereby driving the threaded rod 15 to rotate, realizing the automatic drive of the piston 14, and forming a linkage between the action of the upper mold 1 and the heat replenishment system.

[0026] In this utility model, when the device is used, the two sets of door seals to be welded are first placed in the placement groove 4 of the lower mold 2, and the positioning part 13 of the lower mold 3 is in close contact with the inner wall of the placement groove 4 to achieve precise positioning of the door seals and ensure the accuracy of the welding position.

[0027] At this time, the upper mold 1 is in the open state and is not engaged with the lower mold 2 and lower mold 3. When preparing for welding, the operator pushes the upper mold 1 downwards, engaging it with the upper ends of the lower molds 2 and 3. During this process, the rack 21 on the outer wall of the upper mold 1 meshes with the gear 22 on the outer wall of the heat transfer box 5. As the upper mold 1 moves downwards, the rack 21 drives the gear 22 to rotate. Since the gear 22 is coaxially and fixedly connected to the threaded rod 15, the threaded rod 15 rotates synchronously.

[0028] The rotation of the threaded rod 15, via threaded transmission, causes the slider 17, threadedly connected to the threaded rod 15, to move linearly along the inner wall of the heat-conducting box 5 under the constraint of the limiting rod 16. This drives the piston 14 to move within the heat-conducting box 5. When the piston 14 moves closer to the connecting pipe 6, the heat medium in the heat-conducting box 5, pushed by the piston 14, enters the heat-conducting cavity 12 of the lower mold 2 through the connecting pipe 6. Simultaneously, the one-way valve within the connecting pipe 6 ensures unidirectional flow of the heat medium, preventing backflow.

[0029] The heating wire 20, which is installed in the heat conduction box 5 near the end of the connecting pipe 6, continuously heats the heat medium. When the heat of the mold is lost due to the placement and removal of the door seal, the piston 14 pushes the heated heat medium into the heat conduction chamber 12 to replenish the heat of the mold in time.

[0030] Once the upper mold 1 is engaged, adhesive is injected into the mold through the adhesive hole 7. Under the heat generated by the mold, the two sets of door seals and the adhesive fully melt and fuse, completing the welding operation. After welding, the operator pulls the upper mold 1 upwards to separate it from the lower mold 1 2 and lower mold 2 3. During this process, the rack 21 drives the gear 22 and the threaded rod 15 to rotate in the opposite direction, causing the piston 14 to move in the opposite direction. At the same time, the heat medium in the heat conduction chamber 12 is drawn into the heat conduction box 5 for heating, preparing for the heat replenishment of the next welding operation. This circulation of heat medium, combined with the heating of the heating wire 20, avoids the drawback of frequent reheating due to rapid heat dissipation of the mold during a large number of welding operations. It also reduces the thermal stress caused by repeated thermal expansion and contraction of the mold, effectively preventing cracks and deformation on the mold surface and greatly extending the service life of the mold.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A door seal automatic welding mold comprising an upper mold (1), a lower mold one (2) and a lower mold two (3), characterized in that, The lower mold two (3) is connected with the lower mold one (2) through the fixing seat (10), the upper mold (1) is clamped on the upper end of the lower mold one (2) and the lower mold two (3), the end surface of the lower mold one (2) is provided with a placing groove (4), the outer wall of the lower mold two (3) is fixedly connected with a positioning piece (13), the outer walls on the two sides of the positioning piece (13) are in contact with the inner wall of the placing groove (4), the upper end of the upper mold (1) is provided with a glue hole (7), the lower mold one (2) is internally provided with a heat conduction cavity (12), the outer wall of the lower mold one (2) is fixedly connected with a heat conduction box (5), the outer wall of the heat conduction box (5) is fixedly connected with two groups of connecting pipes (6), and both ends are in communication with the inside of the heat conduction cavity (12), and the two groups of connecting pipes (6) are provided with one-way valves, the heat conduction box (5) is provided with an electric heating wire (20) close to one end of the connecting pipe (6), the heat conduction box (5) is movably connected with a piston (14), and the heat conduction box (5) is provided with a driving mechanism for driving the piston (14) to move.

2. A door weatherstrip automatic welding mold according to claim 1, characterized in that, The driving mechanism comprises a sliding block (17) slidingly connected in the heat conduction box (5), and the outer wall of the sliding block (17) is fixedly connected with a connecting rod (18), and the end of the connecting rod (18) is fixedly connected with the piston (14).

3. A door weatherstrip automatic welding mold according to claim 2, wherein The inner wall of the heat conduction box (5) is rotatably connected with a threaded rod (15), the sliding block (17) is threadedly connected on the threaded section of the threaded rod (15), and the end of the threaded rod (15) is fixedly connected with a limiting block (19), and the radius size of the limiting block (19) is greater than the radius size of the threaded rod (15).

4. A door weatherstrip automatic welding mold according to claim 3, wherein The inner wall of the heat conduction box (5) is fixedly connected with a limiting rod (16), and the sliding block (17) is slidingly connected on the outer wall of the limiting rod (16), the outer wall of the heat conduction box (5) is rotatably connected with a gear (22), and the gear (22) is coaxially fixedly connected with the threaded rod (15).

5. A door weatherstrip automatic welding mold according to claim 4, wherein The outer wall of the lower mold one (2) is provided with a fixed groove (11), the fixed seat (10) is clamped on the outer wall of the fixed groove (11), and the inner wall of the fixed groove (11) and the outer wall of the fixed seat (10) are both T-shaped.

6. A door weatherstrip automatic welding mold according to claim 5, wherein The outer wall of the upper mold (1) is fixedly connected with a rack (21), the rack (21) and the gear (22) are intermeshed, the upper end of the lower mold one (2) and the lower mold two (3) is provided with a plurality of positioning holes (9), and the lower end surface of the upper mold (1) is provided with a positioning rod (8) corresponding to the position of the positioning hole (9).

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