Plastic welding piece clamping tool and infrared plastic welding machine comprising same

Abstract

The utility model relates to the technical field of plastic welding equipment manufacturing, in particular to a plastic welding piece clamping tool and an infrared plastic welding machine comprising the plastic welding piece clamping tool, which comprise a bottom plate, a positioning and clamping assembly body, a connecting and fastening assembly and a lateral thrust fine adjustment unit. And the positioning and clamping assembly body and the bottom plate are attached and contacted and are fixed into a whole by means of the connecting and fastening assembly. And the bottom plate takes the driving platform as a mounting foundation. And when the connection fastening assembly is not completely tightened, the relative position of the positioning and clamping assembly body can be changed under the action of horizontal thrust of the lateral thrust fine adjustment unit. Therefore, in practical application, the relative position of the positioning and clamping assembly body is adaptively adjusted by means of the side-pushing fine adjustment unit, so that the position deviation of a plastic material caused by thermal expansion and process tolerance is compensated, the precise alignment of a plastic welding piece and an infrared thermal radiation module is ensured, the phenomenon of local overheating or insufficient heating is avoided, and meanwhile, the service life of the plastic welding piece and the infrared thermal radiation module is prolonged. And the millimeter-level alignment precision of the two opposite plastic welding pieces during top contact welding is ensured.

Description

Technical Field

[0001] This utility model relates to the field of plastic welding equipment manufacturing technology, and in particular to a plastic welding part clamping fixture and an infrared plastic welding machine including the fixture. Background Technology

[0002] In industries such as automotive manufacturing, electronics, and medical devices, infrared plastic welding machines have become essential equipment for welding thermoplastic parts due to their advantages such as uniform heating, high welding efficiency, and small heat-affected zone. During infrared plastic welding, the fixture for clamping the plastic parts is a core component that directly affects welding quality and production efficiency. It not only needs to accurately deliver the plastic parts to the vicinity of the infrared heat radiation module for heating but also needs to ensure the positional accuracy of the two opposing plastic parts during top-contact welding to avoid problems such as welding misalignment and weak welds.

[0003] Currently, most common fixtures for clamping plastic welded parts employ a fixed structure design. On one hand, once installed, the relative positions of the traditional fixture's positioning and clamping structures are completely fixed, lacking dynamic adjustment capabilities. Due to the inherently high coefficient of thermal expansion of plastic materials, dimensional deformation is easily generated during injection molding, environmental temperature changes, and welding heating. Furthermore, the inherent tolerances in the injection molding process lead to unavoidable slight deviations between the actual dimensions of the plastic welded parts and the theoretical design. These deviations cannot be effectively corrected by fixed-structure fixtures, directly causing frequent offsets in the relative positions of the plastic welded parts and the infrared thermal radiation module. In actual production, this offset can lead to localized overheating of the plastic welded parts, causing problems such as material carbonization and degradation, or insufficient heating preventing complete melting of the weld surface, ultimately resulting in a significant decrease in weld strength and a rough, uneven weld surface, severely affecting the structural strength and appearance quality of the product. On the other hand, in the top-contact welding stage of two opposing plastic welded parts, the fixed nature of traditional fixtures further amplifies even small positional deviations. Even millimeter-level offsets can lead to incomplete bonding at the weld interface, resulting in weld misalignment, incomplete welds, and other issues that significantly reduce product yield. Therefore, it is imperative for technicians to address these problems. Utility Model Content

[0004] This utility model aims to provide a clamping fixture for plastic welded parts, attempting to solve the problems of traditional fixtures being unable to adjust the position and the plastic welded parts being inaccurately fixed, so as to achieve high-precision positioning and stable clamping of plastic welded parts during the infrared thermal radiation melting welding process, thereby improving welding quality and production efficiency.

[0005] This utility model relates to a clamping fixture for plastic welded parts, used to position and clamp plastic welded parts, which are carried by a drive platform. During the lifting and lowering movement of the drive platform, the plastic welded parts can approach / move away from an infrared thermal radiation module, or come into contact with another plastic welded part to complete fusion welding. The clamping fixture includes a base plate, a positioning and clamping assembly, a fastening assembly, and a side-push fine-tuning unit. The positioning and clamping assembly is in contact with the base plate and is fixed together by means of the fastening assembly. The base plate uses the drive platform as the mounting base, and the two are fixed in a detachable manner. When the fastening assembly is not fully tightened, the positioning and clamping assembly can change its relative position under the horizontal thrust of the side-push fine-tuning unit.

[0006] As a further improvement to the technical solution disclosed in this utility model, the side-pushing fine-tuning unit is composed of multiple lateral jacking components. These multiple lateral jacking components are all mounted on a base plate and are evenly distributed around the periphery of the positioning and clamping assembly.

[0007] As a further improvement to the technical solution disclosed in this utility model, the lateral jacking assembly includes a load-bearing member, a vertical fastening bolt, at least one locating pin, and at least one horizontal jacking bolt. The load-bearing member is provided with a pin hole adapted to the locating pin, a vertically threaded hole adapted to the vertical fastening bolt, and a transversely threaded hole adapted to the horizontal jacking bolt. The load-bearing member is in contact with the base plate and is positioned by means of the locating pin, and is fastened by the vertical fastening bolt. The horizontal jacking bolt and the transversely threaded hole form a threaded pair engagement, and the bolt applies a horizontal thrust towards the positioning and clamping assembly or performs a retraction action through a linear feed motion.

[0008] As a further improvement to the technical solution disclosed in this utility model, the positioning and clamping assembly includes a base plate, a support component, and a vacuum adsorption platform. The vacuum adsorption platform is arranged parallel to the base plate, and the support component is connected between the base plate and the vacuum adsorption platform.

[0009] As a further improvement to the technical solution disclosed in this utility model, the vacuum adsorption platform includes a support base, vacuum adsorption nozzles, and a position guiding unit. A groove matching the shape of the plastic weldment is formed on the working surface of the support base. Multiple vacuum adsorption nozzles are inserted into the support base and work together to adsorb the plastic weldment. The position guiding unit uses the support base as its mounting base. When the plastic weldment is placed in the groove, the vacuum adsorption nozzles work together to apply an adsorption force to it, and during this process, the position guiding unit applies a guiding force to the plastic weldment.

[0010] As a further improvement to the technical solution disclosed in this utility model, the vacuum adsorption platform includes a fall protection unit. The fall protection unit uses a support base as its mounting foundation. After the position of the workpiece to be welded is corrected, it is maintained in a stable clamping posture due to the holding force from the fall protection unit.

[0011] As a further improvement to the technical solution disclosed in this utility model, the fall protection unit consists of multiple side-support cylinders. The multiple side-support cylinders are evenly distributed around the support base.

[0012] As a further improvement to the technical solution disclosed in this utility model, the position guiding unit consists of multiple spring plungers. These spring plungers are evenly distributed on the working surface of the bearing seat.

[0013] As a further improvement to the technical solution disclosed in this utility model, the fastening assembly includes bolt assemblies and wear-resistant sleeves. Multiple bolt assemblies work together to fix the positioning clamping assembly to the base plate, while the wear-resistant sleeves, through which the bolt assemblies pass, are embedded in the base plate.

[0014] An infrared plastic welding machine includes the aforementioned plastic welding part clamping fixture.

[0015] In practical applications, the clamping fixture for plastic welding parts disclosed in this utility model can achieve at least the following beneficial technical effects, specifically:

[0016] 1) The side-push fine-tuning unit of this solution can adaptively adjust the relative position of the positioning and clamping assembly when the fastening components are not fully tightened, in order to compensate for the positional offset of the plastic material caused by thermal expansion and process tolerance, ensure the precise alignment of the plastic welding parts and the infrared thermal radiation module, avoid local overheating or insufficient heating, and at the same time ensure the millimeter-level alignment accuracy when the two opposing plastic welding parts are welded together, effectively solving problems such as welding misalignment and weak fusion.

[0017] 2) The operation of the side-push fine-tuning unit is intuitive and easy to understand. It does not require a complicated disassembly and reassembly process, which can greatly reduce the technical difficulty and labor intensity of operators and shorten the tooling debugging time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional schematic diagram of the infrared plastic welding machine disclosed in this utility model (with the double protective doors hidden).

[0020] Figure 2 yes Figure 1 The front view.

[0021] Figure 3This is a three-dimensional schematic diagram of the infrared plastic welding machine disclosed in this utility model (with the double protective doors and the frame hidden).

[0022] Figure 4 This is a three-dimensional schematic diagram of the clamping fixture for the upper plastic welding parts disclosed in this utility model (with hidden lines visible).

[0023] Figure 5 This is a three-dimensional schematic diagram of the clamping fixture for the upper plastic welding parts disclosed in this utility model from another perspective.

[0024] Figure 6 This is a three-dimensional schematic diagram of the positioning and clamping assembly in the clamping fixture for the upper plastic welding parts disclosed in this utility model.

[0025] Figure 7 This is a three-dimensional schematic diagram of the spring plunger in the clamping fixture for the upper plastic welding part disclosed in this utility model.

[0026] Figure 8 This is a three-dimensional schematic diagram of the vacuum suction nozzle in the clamping fixture for the upper plastic welding parts disclosed in this utility model.

[0027] Figure 9 This is a three-dimensional schematic diagram of the lateral lifting component in the clamping fixture for the upper plastic welding parts disclosed in this utility model.

[0028] 1-Frame; 2-Infrared thermal radiation module; 3-Upper plastic welding part clamping fixture; 31-Base plate; 32-Positioning clamping assembly; 321-Base plate; 322-Supporting component; 323-Vacuum adsorption platform; 3231-Bearing seat; 3232-Vacuum adsorption nozzle; 3233-Positioning guide unit; 32331-Spring plunger; 3234-Anti-fall unit; 32341-Side support cylinder; 33-Connecting fastening component; 331-Anti-wear sleeve; 34-Side push fine adjustment unit; 341-Side jacking component; 3411-Bearing component; 3412-Vertical fastening bolt; 3413-Positioning pin; 3414-Horizontal jacking bolt; 4-Lower plastic welding part clamping fixture; 5-First drive platform; 6-Second drive platform; 7-Third drive platform. Detailed Implementation

[0029] In the description of this utility model, it should be understood that the terms "left", "right", "front", "rear", "upper", "lower", etc., indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, or be constructed and operated in a specific position, and therefore should not be construed as a limitation of this utility model.

[0030] The present invention will be further described in detail below with reference to specific embodiments, such as... Figures 1-3 As shown in the diagram, the infrared plastic welding machine mainly consists of a frame 1, an infrared heat radiation module 2, an upper plastic welding part clamping fixture 3, a lower plastic welding part clamping fixture 4, a first drive platform 5, a second drive platform 6, and a third drive platform 7. The frame 1, serving as the basic framework of the infrared plastic welding machine, is typically made of high-strength steel, providing stable support for all components. The first drive platform 5, second drive platform 6, and third drive platform 7 respectively support the infrared heat radiation module 2, the upper plastic welding part clamping fixture 3, and the lower plastic welding part clamping fixture 4, with the frame 1 serving as the mounting and fixing foundation for all three. The upper and lower plastic welding part clamping fixtures 3 and 4 are used to position and clamp the plastic welding parts. The infrared heat radiation module 2, as the core heating component, emits infrared rays that allow the surface of the plastic welding part to absorb energy and convert it into heat, thus melting the area to be welded. During the operation of the infrared plastic welding machine, the first drive platform 5 first drives the infrared heat radiation module 2 to move horizontally to the preset working position. Subsequently, the second drive platform 6 and the third drive platform 7 move synchronously, respectively driving the upper plastic welding part clamping fixture 3 and the lower plastic welding part clamping fixture 4 to move towards the infrared heat radiation module 2. When the distance between the upper plastic welding part clamping fixture 3 and the lower plastic welding part clamping fixture 4 and the infrared heat radiation module 2 reaches the preset value, the second drive platform 6 and the third drive platform 7 both stop moving. At this time, under the continuous radiation of infrared rays, the welding edges of the two opposite plastic welding parts gradually heat up to a molten state, laying the foundation for the subsequent top-contact welding process.

[0031] As described above, in the infrared plastic welding process, the upper plastic welding part clamping fixture 3 and the lower plastic welding part clamping fixture 4 are core components that directly affect welding quality and production efficiency. Furthermore, due to... Figures 1-3 As shown in the figure, the upper plastic welding part clamping fixture 3 and the lower plastic welding part clamping fixture 4 have similar design structures, installation methods and clamping operation methods. Therefore, in order to save space, only the upper plastic welding part clamping fixture 3 will be described in detail here.

[0032] like Figure 4 , Figure 5 As shown, the upper-mounted plastic welding part clamping fixture 3 mainly consists of a base plate 31, a positioning clamping assembly 32, a fastening and fixing component 33, and a side-push fine-tuning unit 34. The positioning clamping assembly 32 is used to directly position and clamp the plastic welding part. It is in contact with the base plate 31 and is fixed together with the fastening and fixing component 33. The base plate 31 uses the first drive platform 5 as the mounting base, and the two are fixed in a detachable manner. When the fastening and fixing component 33 is not fully tightened, the positioning clamping assembly 32 has a certain degree of translational freedom, and its relative position can be changed under the horizontal thrust from the side-push fine-tuning unit 34.

[0033] By adopting the above technical solution, on the one hand, under the premise that the positioning and clamping assembly 32 has a certain degree of translational freedom, its relative position can be adaptively adjusted by the side-push fine-tuning unit 34 to compensate for the positional offset of the plastic material caused by thermal expansion and process tolerance, ensuring accurate alignment between the plastic welding parts and the infrared thermal radiation module, avoiding local overheating or insufficient heating, and ensuring millimeter-level alignment accuracy when the two opposing plastic welding parts are top-touched during welding, effectively solving problems such as welding misalignment and weak fusion; on the other hand, the operation of the side-push fine-tuning unit 34 is intuitive and easy to understand, without the need for complicated disassembly and reassembly processes, thereby greatly reducing the technical difficulty and labor intensity of operators and shortening the tooling debugging time.

[0034] It should also be noted that the upper plastic welding part clamping fixture 3 is detachable to be fixed with the first drive platform 5, and the relative position of the positioning clamping assembly 32 is adjustable, which can quickly adapt to the diverse needs of plastic welding parts.

[0035] like Figure 4 , Figure 5 As shown, the lateral push fine-tuning unit 34 consists of multiple lateral lifting components 341. These lateral lifting components 341 are all mounted on the base plate 31 and are evenly distributed around the periphery of the positioning clamping assembly 32. This allows for independent or coordinated adjustment of deviations in different directions, enabling multi-angle fine-tuning of the positioning clamping assembly 32 within a plane. For example, when the plastic welded part and the infrared thermal radiation module 2 are offset laterally or longitudinally, the lateral lifting components 341 in the corresponding direction can adjust their push-out distance to precisely correct the relative position of the positioning clamping assembly 32.

[0036] It is known that, based on design common sense, the lateral pushing component 341 can adopt various design structures to achieve lateral pushing of the positioning clamping assembly 32. However, a simple design structure, easy to manufacture and implement, and extremely concise operation method is recommended here, as follows: Figure 9As shown, the lateral jacking assembly 341 is composed of a load-bearing member 3411, a vertical fastening bolt 3412, two side-by-side locating pins 3413, and two side-by-side horizontal jacking bolts 3414. The load-bearing member 3411 has pin holes adapted to the locating pins 3413, vertical internal threaded holes adapted to the vertical fastening bolts 3412, and transverse internal threaded holes adapted to the horizontal jacking bolts 3414. The load-bearing member 3411 is in contact with the base plate 31 and is precisely positioned by means of the locating pins 3413, and is fastened by the vertical fastening bolts 3412. The horizontal jacking bolts 3414 form a threaded pair with the transverse internal threaded holes and apply a horizontal thrust or perform a retraction action towards the positioning clamping assembly 32 through a linear feed motion. Thus, on the one hand, the lateral jacking assembly adopts a design combining two parallel locating pins 3413 and vertical fastening bolts 3412, achieving precise positioning and a firm connection between the load-bearing component 3411 and the base plate 31, avoiding the occurrence of displacement of the thrust direction of the horizontal jacking bolts 3414 due to installation deviations; on the other hand, the double horizontal jacking bolts 3414 design gives the lateral jacking assembly 341 greater flexibility in adjustment force and precision, adapting to the needs of different welding scenarios. Furthermore, the threaded drive has a self-locking characteristic; once the horizontal jacking bolts 3414 are adjusted to the correct position, they will not loosen on their own without external force, ensuring that the positioning and clamping assembly 32 always occupies the correct relative position throughout the welding process.

[0037] like Figure 6 As shown, the positioning and clamping assembly 32 mainly consists of a base plate 321, a support assembly 322, and a vacuum adsorption platform 323. The vacuum adsorption platform 323 is arranged parallel to the base plate 321, while the support assembly 322 is composed of multiple support columns connecting the two. The vacuum adsorption platform 323 includes a carrier base 3231 and a vacuum adsorption nozzle 3232 (e.g., ...). Figure 8 (as shown in the diagram) and a position guiding unit 3233. A groove matching the shape of the welded plastic part is formed on the working surface of the support 3231. Multiple vacuum suction nozzles 3232 are inserted into the support 3231, working together to suction the welded plastic part. The position guiding unit 3233 uses the support 3231 as its mounting base and consists of multiple spring plungers 32331 (as shown in the diagram) and a position guiding unit 3233. Figure 7(As shown in the diagram). Multiple spring plungers 32331 are evenly distributed on the working surface of the support seat 3231. The workpiece to be welded is placed in the sink, and multiple sets of vacuum suction nozzles 3232 work together to apply suction force to it. During this process, multiple spring plungers 32331 work together to apply a guiding force to the workpiece. In this way, on the one hand, the sink and the multiple sets of vacuum suction nozzles 3232 work together to achieve efficient and stable clamping of the workpiece. Furthermore, the recessed design allows for initial positioning of the welded plastic parts, enabling them to quickly fall into the accurate position and reducing clamping errors. The vacuum suction nozzles (3232) apply negative pressure suction evenly to the surface of the welded plastic parts. Compared to traditional mechanical clamping methods, this avoids localized stress concentration on thin-walled or irregularly shaped welded plastic parts, preventing deformation or damage. On the other hand, during the process of the welded plastic parts being placed in the recessed area and suctioned by the vacuum suction nozzles (3232), each spring plunger (32331) undergoes elastic deformation due to the pressure from the welded plastic parts. This deformation, through reaction force, applies a guiding force to the welded plastic parts, automatically correcting any positional deviations. This design requires no manual intervention, allowing for rapid and precise adjustment of the welded plastic parts to the ideal position, achieving millimeter-level or even higher precision positioning.

[0038] The vacuum adsorption nozzle 3232 relies on negative pressure to adsorb the welded plastic parts. However, in the event of a sudden equipment failure (such as air leakage in the vacuum system), severe welding vibration, or a decrease in adsorption force due to unevenness on the surface of the welded plastic parts, vacuum adsorption alone may pose a risk of the welded plastic parts detaching. Therefore, as a further optimization of the above technical solution, [the following is a separate, unrelated section:] Figure 5 , Figure 6 As clearly shown, the vacuum adsorption platform 323 is also equipped with a fall protection unit 3234. The fall protection unit 3234 uses the support base 3231 as its mounting base and consists of multiple side-support cylinders 32341. These side-support cylinders 32341 are evenly distributed around the support base 3231. Once the position of the plastic welding part is corrected, it is maintained in a stable clamping posture due to the coordinated holding force from the multiple side-support cylinders 32341. Thus, the fall protection unit 3234 and the vacuum adsorption nozzle 3232 form a dual fixing system, significantly enhancing the safety of clamping the plastic welding part. The side-support cylinders 32341, evenly distributed around the support base 3231, extend after the plastic welding part is corrected, providing mechanical support from the side. Even if vacuum adsorption fails, they can still firmly hold the plastic welding part, preventing it from falling.

[0039] In this embodiment, the fastening assembly 33 is preferably composed of a plurality of bolt assemblies that simultaneously fasten the base plate 31 and the base plate 321.

[0040] However, in practical use, frequent adjustments to the position of the positioning and clamping assembly 32 are required, which leads to frequent friction between the bolt assembly and the base plate 321. Therefore, as a further optimization of the above technical solution, such as... Figure 5As shown, the fastening assembly 33 is further provided with an anti-wear sleeve 331. The anti-wear sleeve 331 allows the bolt assembly to pass freely through and is embedded in the base plate 321. The anti-wear sleeve 331 is made of wear-resistant material (such as high-strength engineering plastic or metal alloy), which can effectively reduce the direct wear between the bolt assembly and the base plate 321, significantly extend the service life of the base plate 321 and the bolt assembly, and reduce the frequency of component replacement.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A clamping fixture for plastic welded parts, used to position and clamp plastic welded parts, which are carried by a drive platform; during the lifting movement of the drive platform, the plastic welded parts can approach / move away from an infrared thermal radiation module, or come into contact with another plastic welded part to complete fusion welding, characterized in that, The fixture for clamping the plastic welding parts includes a base plate, a positioning and clamping assembly, a fastening assembly, and a side-push fine-tuning unit. The positioning and clamping assembly is in contact with the base plate and is fixed together by means of the fastening assembly. The base plate is mounted on a drive platform, and the two are fixed in a detachable manner. When the fastening assembly is not fully tightened, the positioning and clamping assembly can change its relative position under the horizontal thrust of the side-push fine-tuning unit.

2. The fixture for clamping plastic welded parts according to claim 1, characterized in that, The side-push fine-tuning unit consists of multiple side-push components; all of the multiple side-push components are mounted on the base plate and are evenly distributed around the periphery of the positioning clamping assembly.

3. The fixture for clamping plastic welded parts according to claim 2, characterized in that, The lateral jacking assembly includes a load-bearing member, a vertical fastening bolt, at least one locating pin, and at least one horizontal jacking bolt. The load-bearing member is provided with a pin hole adapted to the locating pin, a vertical internal threaded hole adapted to the vertical fastening bolt, and a transverse internal threaded hole adapted to the horizontal jacking bolt. The load-bearing member is in contact with the base plate and is positioned by means of the locating pin and fastened by the vertical fastening bolt. The horizontal jacking bolt forms a threaded pair with the transverse internal threaded hole and applies a horizontal thrust or performs a retraction action towards the positioning and clamping assembly through a linear feed motion.

4. The fixture for clamping plastic welded parts according to any one of claims 1-3, characterized in that, The positioning and clamping assembly includes a base plate, a support component, and a vacuum adsorption platform; the vacuum adsorption platform is arranged parallel to the base plate, and the support component is connected between the base plate and the vacuum adsorption platform.

5. The fixture for clamping plastic welded parts according to claim 4, characterized in that, The vacuum adsorption platform includes a support base, vacuum adsorption nozzles, and a position guiding unit; the working surface of the support base is formed with a groove that matches the shape of the plastic welded part; multiple vacuum adsorption nozzles are inserted into the support base and work together to adsorb the plastic welded part; the position guiding unit uses the support base as its mounting base; Once the plastic welded part is placed in the settling tank, the vacuum suction nozzles work together to apply suction force to it, and during this process, the position guiding unit applies guiding force to the plastic welded part.

6. The fixture for clamping plastic welded parts according to claim 5, characterized in that, The vacuum adsorption platform includes a fall protection unit; the fall protection unit uses the support base as its mounting base; once the position of the workpiece to be welded is corrected, it is maintained in a stable clamping posture due to the holding force from the fall protection unit.

7. The fixture for clamping plastic welded parts according to claim 6, characterized in that, The fall protection unit consists of multiple side support cylinders; the multiple side support cylinders are evenly distributed around the support seat.

8. The fixture for clamping plastic welded parts according to claim 5, characterized in that, The position guiding unit consists of multiple spring plungers; the multiple spring plungers are evenly distributed on the working surface of the bearing seat.

9. The fixture for clamping plastic welded parts according to claim 4, characterized in that, The fastening assembly includes bolt assemblies and wear-resistant sleeves; multiple bolt assemblies cooperate to fix the positioning clamping assembly to the base plate, while the wear-resistant sleeves, through which the bolt assemblies pass, are embedded in the base plate.

10. An infrared plastic welding machine, characterized in that, Includes the clamping fixture for plastic welding parts as described in any one of claims 1-8.

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