Welding device for plastic parts

Abstract

The utility model discloses a welding device for plastic parts, which relates to the technical field of welding and comprises a platform and an upper top plate, a left welding station and a right welding station are respectively arranged below the upper top plate, and a plurality of guide posts are fixedly mounted between the upper top plate and the platform. The lower end of the first piston rod penetrates through the upper top plate and is fixedly connected with a first connecting block, the lower end of the first connecting block is fixedly connected with an upper die plate, and a plurality of cooling fans are fixedly installed on the side of the upper die plate. And a plurality of cooling fans are installed on one side of the upper mold plate, heat at the welding position is taken away through the cooling fans after the plastic part is welded, the cooling time of the plastic part is shortened, the temperature of the welding area is rapidly reduced, the plastic material is rapidly cooled and shaped, and the welding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, specifically to a welding device for plastic parts. Background Technology

[0002] Hot plate welding is a welding process that uses heating elements to heat plastic parts to a molten state, and then joins the molten plastic parts together under pressure. Its main steps include: heating, welding, and cooling. With the widespread application of plastic products in automobiles, home appliances, medical devices, and other fields, higher demands are placed on the welding quality and efficiency of plastic parts. Hot plate welding, as a reliable welding process, can meet these requirements. Advances in heating technology, temperature control technology, and automation control technology have continuously improved the performance of hot plate welding machines, enabling more precise temperature control and a more efficient welding process.

[0003] Hot plate welding is a widely used process for joining plastic parts, but it also has some drawbacks and limitations. Hot plate welding requires heating the plastic parts to a molten state and then cooling them to solidify, a process that is time-consuming. Small plastic parts typically require 15 to 30 seconds, while large plastic parts may require several minutes. Because of the time needed to wait for the plastic parts to melt and cool, the welding cycle is relatively long, resulting in relatively low welding efficiency. Plastic residue easily adheres to the hot plate, and the hot plate is prone to wear and requires regular replacement. Utility Model Content

[0004] To solve the above-mentioned technical problems, a welding apparatus for plastic parts is provided to address the issues raised in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a welding device for plastic parts, comprising a platform and an upper top plate, with a left welding station and a right welding station respectively arranged below the upper top plate, a plurality of guide columns fixedly installed between the upper top plate and the platform, cylinder one fixedly installed on both sides of the top of the upper top plate, a piston rod one arranged inside the cylinder one, the lower end of the piston rod one penetrating the upper top plate and fixedly connected to a connecting block one, the lower end of the connecting block one fixedly connected to an upper template, a plurality of cooling fans fixedly installed on the side of the upper template, a lower mold arranged below the heating mechanism, a lower template fixedly connected to the bottom of the lower mold, a cylinder two fixedly installed at the bottom of the platform, a piston rod two arranged inside the cylinder two, the upper end of the piston rod two penetrating the platform and fixedly connected to a connecting block two, the upper end of the piston rod two fixedly connected to the lower template through the connecting block two, and a control terminal arranged on one side of the platform.

[0006] Preferably, the heating mechanism includes a heating plate, a support plate, a first lead screw, a mounting block, a first guide rail, and a first motor. The output end of the first motor is fixedly connected to a pulley, and the pulley is connected to the first lead screw above it via a belt drive. The first lead screw is threadedly connected to the mounting block on its surface. The top of the mounting block is fixedly connected to the support plate, and the lower end of the mounting block is slidably connected to the first guide rail. The heating plate is fixedly mounted on the top of the support plate, and the first motor drives the first lead screw to move the heating plate along the first guide rail.

[0007] Preferably, a plurality of pre-clamping fixtures are installed on opposite sides of the upper and lower templates, and a positioning block is installed on one side of each pre-clamping fixture, with the pre-clamping fixtures and positioning blocks spaced apart.

[0008] Preferably, the guide post passes through the upper template and the lower template and its surface is slidably connected to the upper template and the lower template, and the upper template and the lower template move up and down along the guide post.

[0009] Preferably, the number of cooling fans is four.

[0010] Preferably, the heating plate is made of aluminum alloy or ceramic, and heating wires are evenly distributed inside the heating plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: a heating plate slides along the first guide rail between two welding stations. After heating one plastic part, it can slide to another welding workpiece for heating, which reduces the number of heating plates, makes more efficient use of the heat of the heating plates, and reduces the idle time of the heating plates. Multiple cooling fans are installed on one side of the upper template. After the plastic part is welded, the cooling fans remove the heat from the welding point, shorten the cooling time of the plastic part, quickly reduce the temperature of the welding area, and make the plastic material cool and solidify quickly, thereby improving the welding efficiency. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is the right view of the present invention;

[0014] Figure 3 for Figure 1 Enlarged diagram of point A in the middle.

[0015] The numbers on the map are:

[0016] 1. Platform; 2. Top plate; 3. Left welding station; 4. Right welding station; 5. Guide column; 6. Cylinder 1; 601. Piston rod 1; 7. Connecting block 1; 8. Upper template; 9. Upper mold; 10. Heating mechanism; 11. Cooling fan; 12. Lower mold; 13. Lower template; 14. Cylinder 2; 1401. Piston rod 2; 15. Connecting block 2; 16. Control terminal; 17. Heating plate; 18. Support plate; 19. First lead screw; 20. Mounting block; 21. First guide rail; 22. First motor; 23. Pulley; 24. Pre-clamping fixture; 25. Positioning block. Detailed Implementation

[0017] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0018] Reference Figure 1-3As shown, this utility model provides a technical solution: a welding device for plastic parts, including a platform 1 and an upper top plate 2. A left welding station 3 and a right welding station 4 are respectively arranged below the upper top plate 2. Several guide columns 5 are fixedly installed between the upper top plate 2 and the platform 1. Cylinders 6 are fixedly installed on both sides of the top of the upper top plate 2. A piston rod 601 is installed inside the cylinder 6. The lower end of the piston rod 601 passes through the upper top plate 2 and is fixedly connected to a connecting block 7. The lower end of the connecting block 7 is fixedly connected to an upper template 8. The connecting block 7 connects the components together to form a stable frame. The structure ensures equipment operation. An upper mold 9 is fixedly installed below the upper template 8. A cylinder 6 drives the upper template 8, connected to the upper mold 9, to move up and down along the guide column 5. A heating mechanism 10 is installed below the upper mold 9. The heating mechanism 10 includes a heating plate 17, a support plate 18, a first lead screw 19, a mounting block 20, a first guide rail 21, and a first motor 22. A pulley 23 is fixedly connected to the output end of the first motor 22. The pulley 23 is connected to the first lead screw 19 above it via belt drive. The first lead screw 19 is threadedly connected to the mounting block 20 on its surface. When heating begins, the first motor... Machine 22 drives the first lead screw 19 to rotate synchronously via pulley 23. The first lead screw 19 drives the mounting block 20, connected to the support plate 18, to slide along the first guide rail 21 between the left welding station 3 and the right welding station 4. The top of the mounting block 20 is fixedly connected to the support plate 18, and the lower end of the mounting block 20 is slidably connected to the first guide rail 21. A heating plate 17 is fixedly mounted on the top of the support plate 18. The support plate 18 and the heating plate 17 mounted on it can approach or move away from the upper mold 9 and the lower mold 12. The heating plate 17 is made of aluminum alloy or ceramic, and its interior is evenly distributed. The upper mold 9 is equipped with heating wires and heating plates 17, which heat the plastic parts inside the upper mold 9 until they are molten. One heating plate 17 slides along the first guide rail 21 between two welding stations. After heating one plastic part, it can slide to another workpiece for heating, reducing the number of heating plates. The first motor 22 drives the first lead screw 19 to move the heating plate 17 along the first guide rail 21, allowing for more efficient use of the heat from the heating plates and reducing their idle time. Multiple cooling fans 11 are fixedly installed on one side of the upper mold 8; there are four cooling fans 11. The cooling fans 11 are activated after welding is completed.After the plastic parts are welded, the heat from the weld is removed by the cooling fan 11, shortening the cooling time of the plastic parts, rapidly reducing the temperature of the weld area, and allowing the plastic material to cool and solidify quickly, thus improving welding efficiency. Below the heating mechanism 10 is a lower mold 12, with a lower template 13 fixedly connected to the bottom of the lower mold 12. A guide post 5 passes through the upper template 8 and the lower template 13, and its surface is slidably connected to the upper template 8 and the lower template 13. The upper template 8 and the lower template 13 move up and down along the guide post 5. Several pre-clamping fixtures 24 are installed on opposite sides of the upper template 8 and the lower template 13. A positioning block 25 is installed on one side of each pre-clamping fixture 24, spaced apart. At the left welding station 3, the plastic parts are clamped between the upper mold 9 and the lower mold 12. The position of the plastic parts is restricted by the pre-clamping fixtures 24 and the positioning blocks 25. The main function of the pre-clamping fixtures 24 is to pre-fix the plastic parts during processing or molding, preventing them from shifting during processing. The plastic part moves or deforms, and its edge or specific part fits tightly against the positioning block 25, restricting its horizontal movement. A cylinder 2 14 is fixedly installed at the bottom of platform 1. Cylinder 2 14 drives the lower template 13 to move up and down along the guide column 5. A piston rod 2 1401 is installed inside cylinder 2 14. The upper end of piston rod 2 1401 passes through platform 1 and is fixedly connected to connecting block 2 15. Piston rod 2 1401 is fixedly connected to the lower template 13 through connecting block 2 15. A control terminal 16 is installed on one side of platform 1. The control terminal 16 controls the support plate 18 to move alternately between the two welding workpieces. The control terminal 16 uses a PLC to control its digital output module to output PWM signals to control the first motor 22. For cylinders 1 6 and 2 14, the extension and retraction of the cylinders are controlled by energizing and de-energizing the solenoid valve coils. The control terminal 16 also has an alternating welding logic program for the left welding station 3 and the right welding station 4, and a single-station locking welding logic program.

[0019] The usage process of this utility model is as follows: The support plate 18, together with the heating plate 17 installed on it, can approach or move away from the upper mold 9 and the lower mold 12. When heating begins, the first motor 22 drives the first lead screw 19 to rotate synchronously through the pulley 23. The first lead screw 19 drives the mounting block 20, connected to the support plate 18, to slide along the first guide rail 21 between the left welding station 3 and the right welding station 4. The control terminal 16 controls the support plate 18 to move alternately between the two welding workpieces. First, at the left welding station 3, the plastic part is clamped into the upper mold 9 and the lower mold 12. The position of the plastic part is restricted by the pre-clamping fixture 24 and the positioning block 25. Then, the cylinder 6 drives the upper template 8, connected to the upper mold 9, to move downward along the guide post 5. The control terminal 16 is used to synchronously control the two solenoid valves. The control terminal 16 simultaneously... Output two identical control signals to ensure that the on / off actions of the two solenoid valves are synchronized, the signals are synchronized, the timing of the control signals is consistent, and the cylinder 16 and cylinder 214 extend and retract synchronously. The heating plate 17 heats the plastic parts in the upper mold 9 to make them melt. Then, cylinder 16 drives the upper template 8 to move upward. The control terminal 16 drives the support plate 18 and the heating plate 17 to move to the right welding station 4. Cylinder 16 on the left welding station 3 drives the upper template 8 to move downward. Cylinder 214 drives the lower template 13 to move upward along the guide column 5, so that the two plastic parts are welded together. Perform the same operation on the right welding station 4. After the welding is completed, start the cooling fan 11 to accelerate the cooling of the welding part. Then, remove the welding workpiece and place the plastic part on the left welding station 3 in advance. After the right welding station 4 completes the welding, repeat the operation.

[0020] In summary, the advantages of this utility model are as follows: using one hot plate to act on two welding stations can make more efficient use of the heat of the hot plate, reduce the idle time of the hot plate, allow for more precise temperature control of a single hot plate, ensure that the welding temperature of the two welding devices is consistent, and use a cooling fan to reduce the temperature of the welding area, so that the plastic material can be cooled and shaped quickly, thereby improving welding efficiency.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A welding apparatus for plastic parts, comprising a platform (1) and an upper top plate (2), characterized in that: A left welding station (3) and a right welding station (4) are respectively provided below the upper top plate (2). Several guide columns (5) are fixedly installed between the upper top plate (2) and the platform (1). Cylinder 1 (6) is fixedly installed on both sides of the top of the upper top plate (2). A piston rod 1 (601) is provided inside the cylinder 1 (6). The lower end of the piston rod 1 (601) passes through the upper top plate (2) and is fixedly connected to the connecting block 1 (7). The lower end of the connecting block 1 (7) is fixedly connected to the upper template (8). An upper mold (9) is fixedly installed below the upper template (8). A heating mechanism (10) is provided below the upper mold (9). Multiple cooling fans (11) are fixedly installed on one side of the upper template (8). A lower mold (12) is provided below the heating mechanism (10). A lower template (13) is fixedly connected to the bottom of the lower mold (12). A cylinder (14) is fixedly installed at the bottom of the platform (1). A piston rod (1401) is provided inside the cylinder (14). The upper end of the piston rod (1401) passes through the platform (1) and is fixedly connected to the connecting block (15). The upper end of the piston rod (1401) is fixedly connected to the lower template (13) through the connecting block (15). A control terminal (16) is provided on one side of the platform (1).

2. The welding apparatus for plastic parts according to claim 1, characterized in that: The heating mechanism (10) includes a heating plate (17), a support plate (18), a first lead screw (19), a mounting block (20), a first guide rail (21), and a first motor (22). The output end of the first motor (22) is fixedly connected to a pulley (23). The pulley (23) is connected to the first lead screw (19) above it via a belt drive. The first lead screw (19) is threadedly connected to the mounting block (20) on its surface. The top of the mounting block (20) is fixedly connected to the support plate (18), and the lower end of the mounting block (20) is slidably connected to the first guide rail (21). The heating plate (17) is fixedly mounted on the top of the support plate (18). The first motor (22) drives the first lead screw (19) to move the heating plate (17) along the first guide rail (21).

3. The welding apparatus for plastic parts according to claim 1, characterized in that: Several pre-clamping fixtures (24) are installed on the opposite side of the upper template (8) and the lower template (13). A positioning block (25) is installed on one side of each pre-clamping fixture (24). The pre-clamping fixtures (24) and the positioning blocks (25) are spaced apart.

4. The welding apparatus for plastic parts according to claim 1, characterized in that: The guide post (5) passes through the upper template (8) and the lower template (13) and its surface is slidably connected to the upper template (8) and the lower template (13). The upper template (8) and the lower template (13) move up and down along the guide post (5).

5. The welding apparatus for plastic parts according to claim 1, characterized in that: The number of cooling fans (11) is four.

6. The welding apparatus for plastic parts according to claim 2, characterized in that: The heating plate (17) is made of aluminum alloy or ceramic, and heating wires are evenly distributed inside the heating plate (17).

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