A hollow plastic plate welding machine and its welding process

Abstract

The present invention discloses a hollow plastic plate welding machine, which includes a frame and a fixed gantry and a movable gantry arranged inside the frame. A table board is arranged in the frame. The fixed gantry is fixed on the table board. The movable gantry is arranged opposite to the fixed gantry and is movably arranged on the table board. Ultrasonic welding assemblies, side pressing assemblies and end pressing assemblies are arranged on both gantries. Two groups of ultrasonic welding assemblies are arranged on each gantry, and the welding heads of the two groups of ultrasonic welding assemblies are arranged vertically opposite to each other and respectively act on the upper and lower surfaces of the joint of the PVC main body and the PP end. The two ends of the hollow plastic plate to be welded are located at the two side gantries, and each end is clamped by the side pressing assembly on the upper and lower sides of the PVC main body, and the PP end is pressed against the PVC main body by the end pressing assembly, and then double-sided welding is carried out by the two groups of ultrasonic welding assemblies. The present invention also discloses a welding process of the hollow plastic plate welding machine.

Description

Technical Field

[0001] The present invention relates to a plastic plate forming device, and in particular to a hollow plastic plate welding machine and its welding process. Background Art

[0002] In the current home improvement industry, to meet simple usage needs, many cabinets are built with plastic plates, which are convenient to use, lightweight, and have low manufacturing costs. Such hollow plastic plates generally consist of a PVC main body and two PP ends. When leaving the factory, the main body and the ends need to be fixed together to form a finished plate for later assembly.

[0003] When producing hollow plastic plates, the traditional method is to use glue for adhesion and fixation. However, glue pasting is not environmentally friendly, and it is easy to have the phenomena of excessive or insufficient glue, resulting in glue overflow or lack of glue, which affects the product appearance or reliable fixation. Now, advanced equipment generally uses laser welding or ultrasonic welding methods. The equipment cost is high, and it is generally used in combination with manual operation. Before welding, manual operation is required to fit the ends and the main body together, and then auxiliary operations such as loading and unloading, positioning, flipping, and changing the welding head for welding are carried out. The steps are numerous, the production efficiency is low, and it is easy to have problems such as insufficient or excessive pressing, and the welding quality is uneven. Therefore, it is hoped to independently develop a welding device for use in the manufacture of hollow plastic plates. Summary of the Invention

[0004] Based on the above, the purpose of the present invention is to provide a hollow plastic plate welding machine and its welding process, design the overall machine structure and corresponding process flow, and intelligently complete a series of welding actions to achieve automated production.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A hollow plastic plate welding machine, the hollow plastic plate includes a PVC main body and PP ends located at both ends thereof. The welding machine includes a frame and a fixed gantry and a moving gantry arranged inside the frame. A table board is arranged in the frame, the fixed gantry is fixed on the table board, the moving gantry is arranged opposite to the fixed gantry and is movably arranged on the table board. Ultrasonic welding components, side pressing components, and end pressing components are arranged on both gantries. Two groups of ultrasonic welding components are arranged on each gantry, and the welding heads of the two groups of ultrasonic welding components are arranged vertically opposite to each other and respectively act on the upper and lower surfaces of the joint of the PVC main body and the PP end. Both ends of the hollow plastic plate to be welded are located at the two side gantries, and each end is clamped by the side pressing components on the upper and lower sides of the PVC main body, and the PP end is pressed against the PVC main body by the end pressing components, and then double-sided welding is carried out by the two groups of ultrasonic welding components.

[0007] Among them, the welding machine also includes a translation assembly, two translation assemblies are located between the two gantries, and each translation assembly is arranged on one side of the corresponding gantry, the translation assembly includes a mounting base plate, a movable plate and a supporting plate, the mounting base plate is fixed on the corresponding gantry, and a loading station, a welding station and an unloading station are sequentially arranged on the mounting base plate, a translation guide rail is arranged on the side of the mounting base plate close to the welding head, a slider matching the translation guide rail is arranged on the movable plate, a supporting cylinder is arranged on the movable plate, and the supporting plate is arranged on the output rod of the supporting cylinder, and the movable plate is driven by the translation cylinder to move along the translation guide rail, so that the supporting plate flows between the three stations.

[0008] Among them, both the loading station and the unloading station are provided with a material discharge bracket, the welding station is provided with a limit seat, a first limit block is provided at one end of the limit seat, and a limit cylinder is provided at the other end, and a second limit block is provided on the output rod of the limit cylinder. The first limit block and the second limit block form a clamp to limit the two side edges of the hollow plastic plate.

[0009] Among them, loading windows and unloading windows are opened at both ends of the frame corresponding to the loading station and unloading station, and an operation panel, a switch panel and a working status indicator light are set on the frame at the loading window end, and side doors are set on both sides of the frame corresponding to the two gantries.

[0010] Among them, the side clamping assembly includes a support rod and a pre-stressing rod. The support rod is flush with the working plane of the welding head below. The pre-stressing rod is located above the support rod and can move up and down relative to the support rod, thereby clamping and fixing the two ends of the hollow plastic plate. Pre-stressing cylinders for driving the pre-stressing rod are provided on both gantries.

[0011] Among them, the end pressing assembly includes an end limit block and a pressing cylinder. The end limit block is attached to the PP end, the cylinder body of the pressing cylinder is fixed on the corresponding gantry, and the output rod is fixedly connected to the end limit block, thereby ensuring that the PP end and the PVC body are tightly assembled.

[0012] Among them, the welding machine also includes a length adjustment component, which includes a guide screw and an adjustment motor. The two guide screws are correspondingly located on both sides of the two gantries. The two ends of the guide screw are respectively fixed to the table panel through hinged seats. The guide screw is equipped with a screw nut. The adjustment motor is connected to one of the guide screws by transmission. The two guide screws are linked by a synchronous belt. The mobile gantry is fixedly connected to the screw nuts on both sides, so as to adjust the distance between the two gantries according to the length of the hollow plastic plate.

[0013] Among them, the welding machine further includes a film winding assembly. One film winding assembly is provided for each group of ultrasonic welding assemblies. The film winding assembly includes a winding reel, an unwinding reel, and a protective film wound between the two. The winding reel and the unwinding reel are arranged at both ends of the welding head corresponding to the ultrasonic welding assembly, and the protective film passes through between the welding head and the hollow plastic plate.

[0014] Among them, the lower ultrasonic welding assembly of the two groups of ultrasonic welding assemblies is fixed to the corresponding gantry. A plurality of guide columns are provided at the top of the upper ultrasonic welding assembly. A connecting plate is fixed on the guide columns. Guide sleeves are provided on the corresponding gantry corresponding to the guide columns, and a lifting cylinder for driving the connecting plate is provided, thereby driving the movement of the upper ultrasonic welding assembly.

[0015] A welding process for a hollow plastic plate welding machine includes the following steps:

[0016] 1) Place the pre-assembled hollow plastic plate on the loading station from the loading window;

[0017] 2) Send a start command through the switch panel and the operation panel;

[0018] 3) Move the hollow plastic plate to the welding station through the translation assembly;

[0019] 4) Adjust the distance between the two gantries according to the plate length by the length adjustment assembly, clamp and fix the upper and lower surfaces of the PVC main body of the hollow plastic plate by the side pressing assembly, and press the PP end of the hollow plastic plate against the PVC main body by the end pressing assembly;

[0020] 5) Simultaneously weld the upper and lower surfaces of the splicing joints of the PVC main body and the PP end at both ends by the ultrasonic welding assemblies on both sides of the gantry;

[0021] 6) Move the welded hollow plastic plate to the unloading station through the translation assembly and take it out from the unloading window to form a process cycle.

[0022] In summary, the beneficial effects of the present invention are as follows. Compared with the prior art, the hollow plastic plate welding machine and its welding process are designed with a double-sided and upper and lower layer welding structure according to the needs of double-sided welding at both ends of the plate, and reliable pre-fixation is carried out before the splicing welding of the PVC main body and the PP end of the plate to ensure the welding quality. In addition, for plates of different sizes, an adjustable design is carried out, with strong versatility, and settings such as the loading and unloading translation device, etc., with a high degree of mechanization, suitable for pipeline automated manufacturing, high work efficiency, and beautiful finished products. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an overall external view of the hollow plastic plate welding machine provided by the embodiment of the present invention;

[0024] Figure 2 It is a structural schematic diagram of a hollow plastic plate welding machine provided by an embodiment of the present invention;

[0025] Figure 3 is a side view of a hollow plastic plate welding machine provided by an embodiment of the present invention;

[0026] Figure 4 is a top view of a hollow plastic plate welding machine provided by an embodiment of the present invention;

[0027] Figure 5 It is an internal structure diagram of a hollow plastic plate welding machine provided by an embodiment of the present invention;

[0028] Figure 6 yes Figure 5 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0030] See also Figures 1 to 6 As shown, this embodiment provides a hollow plastic plate welding machine, wherein the hollow plastic plate includes a PVC body and a PP end cap located at its end.

[0031] The welding machine includes a frame 1 and a fixed gantry 2 and a movable gantry 3 arranged inside the frame 1. A table panel 4 is arranged in the frame 1, the fixed gantry 2 is fixed on the table panel 4, and the movable gantry 3 is arranged opposite to the fixed gantry 2 and can be movably arranged on the table panel 4, which is specifically achieved through a length adjustment component.

[0032] The length adjustment assembly includes a guide screw 5 and an adjustment motor 6. The two guide screws 5 are correspondingly located on both sides of the two gantries. The two ends of the guide screw 5 are respectively fixed to the table panel 4 through hinged seats. The guide screw 5 is equipped with a screw nut 7. The adjustment motor 6 is connected to one of the guide screws 5 through transmission. The two guide screws 5 are linked by a synchronous belt. The mobile gantry 3 is fixedly connected to the screw nuts 7 on both sides, so that the distance between the two gantries can be adjusted according to the length of the hollow plastic plate.

[0033] Two gantries are both provided with ultrasonic welding assemblies, side pressing assemblies, and end pressing assemblies. There are two groups of ultrasonic welding assemblies on each gantry, and the welding heads 8 of the two groups of ultrasonic welding assemblies are arranged vertically opposite to each other and act on the upper and lower surfaces of the joint of the PVC main body and the PP end respectively. The ultrasonic high-frequency vibration wave is transmitted to the surfaces of the PVC and PP objects, and is converted into heat energy through friction. Under the condition of pressurization, the surfaces of the two objects rub against each other to form the fusion between molecular layers. Specifically, the lower ultrasonic welding assembly in the two groups of ultrasonic welding assemblies is fixed on the corresponding gantry. A number of guide columns 9 are provided at the top of the upper ultrasonic welding assembly. A connecting plate 10 is fixed on the guide columns 9. A guide sleeve is provided on the corresponding gantry corresponding to the guide columns 9 and a lifting cylinder 11 for driving the connecting plate 10 is provided, so as to drive the movement of the upper ultrasonic welding assembly.

[0034] The welding machine further includes a translation assembly. The two translation assemblies are located between the two gantries, and each translation assembly is arranged on one side of the corresponding gantry. The translation assembly includes a mounting base plate 12, a moving plate, and a material supporting plate 13. The mounting base plate 12 is fixed on the corresponding gantry. A loading station 16, a welding station 17, and an unloading station 18 are sequentially arranged on the mounting base plate 12. A translation guide rail 14 is arranged on the surface of the mounting base plate 12 close to the welding head 8. A slider matching with the translation guide rail 14 is arranged on the moving plate. A material supporting cylinder 15 is arranged on the moving plate. The material supporting plate 13 is arranged on the output rod of the material supporting cylinder 15. The moving plate is driven by a translation cylinder to move along the translation guide rail 14, so that the material supporting plate 13 circulates among the three stations. In particular, in order to improve the action efficiency of the material supporting plate 13, two material supporting plates 13 can be set to be linked for the three stations.

[0035] Loading brackets are arranged on both the loading station 16 and the unloading station 18. A limiting seat 19 is arranged on the welding station 17. A first limiting block 20 is arranged at one end of the limiting seat 19, and a limiting cylinder 21 is arranged at the other end. A second limiting block 22 is arranged on the output rod of the limiting cylinder 21. The first limiting block 20 and the second limiting block 22 form a clamping pair to limit the two side edges of the hollow plastic plate.

[0036] Feeding windows 23 and unloading windows are opened at both ends of the frame 1 corresponding to the loading station 16 and the unloading station 18. An operation panel 25, a switch panel 26, and a working status indicator light 27 are arranged on the frame 1 at the end of the feeding window 23. Side doors 28 are arranged on both sides of the frame 1 corresponding to the two gantries, and the rest are separately installed through a housing plate 24.

[0037] The side pressing assembly includes a support rod 29 and a pre-pressing rod 30. The support rod 29 is flush with the working plane of the lower welding head 8. The pre-pressing rod 30 is located above the support rod 29 and can move up and down relative to the support rod 29, so as to clamp and fix the two ends of the hollow plastic plate. Pre-pressing cylinders 31 for driving the pre-pressing rod 30 are arranged on both gantry frames. Polyurethane pressing blocks are arranged on the surfaces of the pre-pressing rod 30 in contact with the PVC main body to avoid damaging the surface of the product.

[0038] The end pressing assembly includes an end limiting block 32 and a pressing cylinder 33. The end limiting block 32 abuts against the PP end. The cylinder body of the pressing cylinder 33 is fixed on the corresponding gantry frame, and the output rod is fixedly connected to the end limiting block 32, so as to ensure the tight fitting of the PP end and the PVC main body.

[0039] The welding machine further includes a film winding assembly 34. One film winding assembly 34 is provided for each group of ultrasonic welding assemblies. The film winding assembly 34 includes a winding reel, a unwinding reel and a protective film 35 wound between the two. The winding reel and the unwinding reel are arranged at both ends of the welding head 8 corresponding to the ultrasonic welding assembly. The protective film 35 passes between the welding head 8 and the hollow plastic plate. Guide rollers are arranged at both ends of the support rod 29 and the pre-pressing rod 30, and the protective film 35 is turned around the guide rollers.

[0040] For the above welding machine, this embodiment further provides a welding process for a hollow plastic plate welding machine, which includes the following steps:

[0041] 1) Place the pre-assembled hollow plastic plate on the loading station 16 from the loading window 23;

[0042] 2) Send a start command through the switch panel 26 and the operation panel 25;

[0043] 3) Move the hollow plastic plate to the welding station 17 through the translation assembly;

[0044] 4) Adjust the distance between the two gantry frames according to the plate length by the length adjustment assembly, clamp and fix the upper and lower surfaces of the PVC main body of the hollow plastic plate by the side pressing assembly, and press the PP end of the hollow plastic plate against the PVC main body by the end pressing assembly;

[0045] 5) Simultaneously weld the upper and lower surfaces of the joints where the PVC main body and the PP end at both ends are joined by the ultrasonic welding assemblies on both gantry frames;

[0046] 6) Move the welded hollow plastic plate to the unloading station 18 through the translation assembly and take it out from the unloading window to form a process cycle.

[0047] In summary, the hollow plastic plate welding machine and its welding process are designed with an upper and lower layer welding structure according to the need for double-sided welding of the plates. Moreover, reliable pre-fixation is carried out before the PVC main body and PP end of the plate are spliced and welded, ensuring the welding quality, with a high degree of mechanization, suitable for automated manufacturing on the production line, high work efficiency, and beautiful finished products.

[0048] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above examples. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A hollow plastic plate welding machine, wherein the hollow plastic plate comprises a PVC main body and PP end heads located at both ends thereof, and is characterized in that, the welding machine comprises a frame and a fixed gantry and a movable gantry arranged inside the frame. A table board is arranged in the frame. The fixed gantry is fixed on the table board. The movable gantry is arranged opposite to the fixed gantry and is movably arranged on the table board. Ultrasonic welding assemblies, side pressing assemblies and end pressing assemblies are arranged on both gantries. Two groups of ultrasonic welding assemblies are arranged on each gantry, and the welding heads of the two groups of ultrasonic welding assemblies are arranged vertically opposite to each other and respectively act on the upper and lower surfaces of the joint of the PVC main body and the PP end head. Both ends of the hollow plastic plate to be welded are located at the gantries on both sides. Each end is clamped by the side pressing assembly on the upper and lower sides of the PVC main body, pressed by the end pressing assembly towards the PVC main body for the PP end head, and then double-sided welded by the two groups of ultrasonic welding assemblies. The welding machine further comprises a length adjusting assembly. The length adjusting assembly comprises a guiding lead screw and an adjusting motor. The two guiding lead screws are correspondingly located on both sides of the two gantries. Both ends of the guiding lead screw are respectively fixed on the table board through hinge seats. A lead screw nut is arranged in a matching manner on the guiding lead screw. The adjusting motor is in transmission connection with one of the guiding lead screws. The two guiding lead screws are linked by a synchronous belt. The movable gantry is fixedly connected with the lead screw nuts on both sides, so as to adjust the distance between the two gantries according to the length of the hollow plastic plate. The welding machine further comprises a film winding assembly. One film winding assembly is arranged for each ultrasonic welding assembly. The film winding assembly comprises a winding disc, a unwinding disc and a protective film wound between the two. The winding disc and the unwinding disc are arranged at both ends of the welding head of the corresponding ultrasonic welding assembly. The protective film passes through between the welding head and the hollow plastic plate.

2. The hollow plastic plate welding machine according to claim 1, characterized in that: The welding machine further comprises a translation assembly. The two translation assemblies are located between the two gantries, and each translation assembly is arranged on one side of the corresponding gantry. The translation assembly comprises a mounting base plate, a moving plate and a material supporting plate. The mounting base plate is fixed on the corresponding gantry. An upper feeding station, a welding station and a discharging station are sequentially arranged on the mounting base plate. A translation guide rail is arranged on the surface of the mounting base plate close to the welding head. A sliding block matching with the translation guide rail is arranged on the moving plate. A material supporting cylinder is arranged on the moving plate. The material supporting plate is arranged on the output rod of the material supporting cylinder. The moving plate is driven by a translation cylinder to move along the translation guide rail, so that the material supporting plate circulates among the three stations.

3. The hollow plastic sheet welding machine according to claim 2, characterized in that: Feeding brackets are arranged on both the upper feeding station and the discharging station. A limiting seat is arranged on the welding station. A first limiting block is arranged at one end of the limiting seat, and a limiting cylinder is arranged at the other end. A second limiting block is arranged on the output rod of the limiting cylinder. The first limiting block and the second limiting block form a clamping pair to limit the two side edges of the hollow plastic plate.

4. The hollow plastic sheet welding machine according to claim 2, wherein: Both ends of the frame are provided with a loading window and an unloading window corresponding to the loading station and the unloading station respectively. An operation panel, a switch panel and a working status indicator light are arranged on the frame at the loading window end. Side doors are arranged on both sides of the frame corresponding to the two gantry frames.

5. The hollow plastic sheet welding machine according to claim 1, characterized in that: The side pressing assembly includes a support rod and a pre-pressing rod. The support rod is flush with the working plane of the lower welding head. The pre-pressing rod is located above the support rod and can move up and down relative to the support rod, so as to clamp and fix the two ends of the hollow plastic plate. Pre-pressing cylinders for driving the pre-pressing rod are arranged on both gantry frames.

6. The hollow plastic plate welding machine according to claim 1, characterized in that: The end pressing assembly includes an end limiting block and a pressing cylinder. The end limiting block is abutted against the PP end. The cylinder body of the pressing cylinder is fixed on the corresponding gantry frame, and the output rod is fixedly connected with the end limiting block, so as to ensure the tight fitting of the PP end and the PVC main body.

7. The hollow plastic plate welding machine according to claim 1, wherein: Among the two groups of ultrasonic welding assemblies, the lower ultrasonic welding assembly is fixed on the corresponding gantry frame. A plurality of guide posts are arranged on the top of the upper ultrasonic welding assembly. A connecting plate is fixedly arranged on the guide posts. Guide sleeves are arranged on the corresponding gantry frames corresponding to the guide posts, and a lifting cylinder for driving the connecting plate is arranged, so as to drive the upper ultrasonic welding assembly to move.

8. The welding process of the hollow plastic plate welding machine according to any one of claims 1-7, characterized in that, It includes the following steps: 1) Place the pre-assembled hollow plastic plate on the loading station from the loading window; 2) Send a start command through the switch panel and the operation panel; 3) Move the hollow plastic plate to the welding station through the translation assembly; 4) Adjust the distance between the two gantry frames by the length adjustment assembly according to the plate length. Clamp and fix the upper and lower surfaces of the PVC main body of the hollow plastic plate by the side pressing assembly. Press the PP end of the hollow plastic plate against the PVC main body by the end pressing assembly; 5) Simultaneously weld the upper and lower surfaces of the joint of the PVC main body and the PP end at both ends by the ultrasonic welding assemblies on both gantry frames; 6) Move the welded hollow plastic plate to the unloading station through the translation assembly and take it out from the unloading window to form a process cycle.

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