Arc-shaped plastic part thermoforming apparatus

Abstract

The application discloses arc-shaped plastic part thermoforming equipment, including: rack, arranged with multiple stations; clamp, can clamp both ends of arc-shaped plastic part; multiple groups of material moving assemblies, are horizontally slidably arranged on the rack, the material moving assembly can clamp the clamp and the arc-shaped plastic part on the side opposite to the clamp in the horizontal direction, multiple groups of material moving assemblies can synchronously reciprocate between adjacent stations; the shaping assembly is arranged on the thermoforming station, the shaping assembly includes a profiling piece and multiple pushers arranged around the profiling piece, the profiling piece can open the arc-shaped plastic part, the pusher can slide along the horizontal direction and press the arc-shaped plastic part on the profiling piece, multiple pushers can press the arc-shaped plastic part in turn according to clockwise or counterclockwise order. In the application, the arc-shaped plastic part can be automatically transferred among the stations, the thermoforming efficiency is improved, and the arc-shaped plastic part can be more reliably fitted with the profiling piece, improving product consistency.

Description

Technical Field

[0001] This invention relates to the field of plastic parts processing equipment, and particularly to thermoforming equipment for curved plastic parts. Background Technology

[0002] Currently, the outer shells of home appliances such as audio equipment are mostly made of plastic. In order to meet the requirements of product aesthetics, some plastic parts need to be bent from a flat surface into an arc shape through thermoforming process.

[0003] Existing thermoforming equipment for plastic parts involves bending and fixing sheet-like plastic parts onto a conforming part for heating. The conforming part contains heating rods, and the heated plastic part maintains the same shape as the conforming part. However, current thermoforming equipment has a low level of automation and cannot achieve automatic loading and unloading. Furthermore, existing thermoforming equipment cannot guarantee that the inner surface of the curved plastic part fitted onto the conforming part will perfectly adhere to the outer surface of the conforming part. Inadequate adhesion may result in insufficient heating of certain parts of the curved plastic part, leading to improper bending and affecting the product's appearance and making it difficult to ensure product consistency. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a thermoforming equipment for curved plastic parts, which can realize automatic loading and unloading, improve thermoforming efficiency, and enhance product consistency.

[0005] According to an embodiment of the present invention, a thermoforming equipment for curved plastic parts includes: a frame with multiple workstations arranged in a row, the multiple workstations including a loading workstation, a unloading workstation, and a thermoforming workstation located between the loading workstation and the unloading workstation; a clamp for clamping both ends of a curved plastic part; multiple sets of transfer components, all horizontally slidably disposed on the frame, the transfer components being able to clamp the clamp and the curved plastic part on the side opposite to the clamp in the horizontal direction, the multiple sets of transfer components being able to reciprocate synchronously between adjacent workstations; and a shaping component disposed on the thermoforming workstation, the shaping component including a contouring component and multiple pressing components disposed around the contouring component, the contouring component being able to open the curved plastic part, the pressing components being able to slide in the horizontal direction and press the curved plastic part onto the contouring component, the multiple pressing components being able to sequentially press the curved plastic part in a clockwise or counterclockwise order.

[0006] At least the following beneficial effects are achieved: During processing, the two ends of the curved plastic part can be clamped by a fixture, and then the curved plastic part is placed at the loading station. The transfer component can move horizontally and transfer the curved plastic part from the previous station to the next station. Multiple transfer components can move synchronously. After the transfer component moves the curved plastic part to the position of the shaping component, the conforming component in the shaping component can support the curved plastic part and expand it into the desired shape. Then, multiple pressing components can sequentially press the outer surface of the curved plastic part in a clockwise or counterclockwise order to press the curved plastic part onto the conforming component. In the curved plastic part thermoforming equipment of the present invention, the synchronous movement of multiple sets of transfer components can realize the automatic transfer of the curved plastic part at each station, which can improve thermoforming efficiency and save labor costs. In addition, the sequential pressing of multiple pressing components can make the curved plastic part fit more reliably with the conforming component, prevent the curved plastic part from warping or uneven heating, and improve product consistency.

[0007] According to some embodiments of the present invention, multiple thermoforming stations are provided and are all located between the loading station and the unloading station. Multiple shaping components are provided and correspond to the multiple thermoforming stations respectively. The multiple thermoforming stations are a preheating station, a heating station and a cooling station.

[0008] According to some embodiments of the present invention, the material transfer assembly includes two grippers that can move vertically, the two grippers can respectively hold the arc-shaped plastic part and the fixture, and the frame is provided with a plurality of pressure plates that can slide horizontally synchronously with the material transfer assembly. The plurality of pressure plates correspond to a plurality of thermoforming stations, and the pressure plates can move vertically and press down on the upper end face of the arc-shaped plastic part.

[0009] According to some embodiments of the present invention, the contoured part is provided with a clearance groove, the clamp is provided with a mounting part, the mounting part is located inside the arc-shaped plastic part, and the mounting part can be inserted into the clearance groove.

[0010] According to some embodiments of the present invention, the clamp has two insertion gaps, which are respectively located on two opposite end faces of the clamp. The two ends of the arc-shaped plastic part can be inserted into the two insertion gaps. The clamp is provided with two sets of positioning components, which are installed on the clamp and correspond to the positions of the two insertion gaps respectively. The positioning components can restrict the ends of the arc-shaped plastic part within the insertion gaps.

[0011] According to some embodiments of the present invention, the positioning component includes a fixing block disposed on the clamp and located on the outside of the arc-shaped plastic part. A plurality of positioning pins are provided on the fixing block. The clamp is provided with a plurality of sets of positioning hole assemblies corresponding to the plurality of positioning pins. The positioning hole assembly includes a first positioning hole and a second positioning hole arranged coaxially. The first positioning hole and the second positioning hole in the same group are respectively located on both sides of the insertion gap. The positioning pin can pass through the first positioning hole, the arc-shaped plastic part and the second positioning hole in sequence.

[0012] According to some embodiments of the present invention, the clamp includes a first clamping plate and a second clamping plate, the insertion gap is formed between the first clamping plate and the second clamping plate, the middle part of the first clamping plate and the middle part of the second clamping plate are connected to each other by fasteners, the fixing block and the first positioning hole are disposed on the first clamping plate, and the mounting part and the second positioning hole are disposed on the second clamping plate.

[0013] According to some embodiments of the present invention, the fixing block is provided with a through hole, a mounting groove and a limiting groove that are sequentially interconnected. The positioning pin has a first end and a second end. The first end of the positioning pin passes through the through hole, and the second end of the positioning pin passes through the limiting groove and can be inserted into the first positioning hole and the second positioning hole. A square limiting block is provided in the middle of the positioning pin. The limiting block is slidably accommodated in the limiting groove. A spring is sleeved between the positioning pin and the limiting block and the first end. The two ends of the spring abut against the end face of the limiting block and the inner surface of the mounting groove, respectively. The outer diameter of the spring is larger than the inner diameter of the through hole, and the height of the limiting block is larger than the outer diameter of the spring.

[0014] According to some embodiments of the present invention, a lifting assembly is further included, the lifting assembly including a cylinder and a top plate, the cylinder body being mounted on the frame, the piston rod of the cylinder being able to push the top plate to move, and the top plate being able to lift at least one of the arcuate plastic part and the clamp to disengage the end of the arcuate plastic part from the profile.

[0015] According to some embodiments of the present invention, the loading station is provided with a turntable, and the turntable is provided with two receiving members. The two receiving members are arranged at a 180° angle at both ends of the turntable. The receiving members can receive the arc-shaped plastic parts connected to the clamps. A baffle is installed on the frame, and the baffle is located above the turntable and between the two receiving members.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of each workstation in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the material transfer assembly in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the shaping component in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure at the material loading station in an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the pushing component and the pushing cylinder in an embodiment of the present invention;

[0024] Figure 7 This is a structural schematic diagram of the assembly position of the lifting component in an embodiment of the present invention;

[0025] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure along the AA direction;

[0026] Figure 9 for Figure 8 A magnified view of the structure at point B in the middle;

[0027] Figure 10 This is a schematic diagram of the assembly structure of the arc-shaped plastic part and the fixture in an embodiment of the present invention;

[0028] Figure 11 This is a schematic diagram of the fixture in an embodiment of the present invention;

[0029] Figure 12 This is a schematic diagram of the structure of the second clamping plate in an embodiment of the present invention;

[0030] Figure 13 This is a schematic diagram of the structure of the first clamping plate in an embodiment of the present invention;

[0031] Figure 14 This is a schematic diagram of the positioning pin in an embodiment of the present invention;

[0032] Figure 15 This is a schematic diagram of the structure of the arc-shaped plastic part in an embodiment of the present invention;

[0033] Figure 16This is a schematic diagram of the contouring component in an embodiment of the present invention.

[0034] Icon labels:

[0035] Frame 100, loading station 110, turntable 111, receiving part 112, thermoforming station 120, preheating station 121, heating station 122, cooling station 123, unloading station 130, baffle 140, unloading conveyor belt 150;

[0036] Clamp 200, insertion gap 210, first clamping plate 220, first positioning hole 221, second clamping plate 230, mounting part 231, second positioning hole 232, and hollow groove 240;

[0037] Positioning component 300, fixing block 310, through hole 311, mounting groove 312, limiting groove 313, positioning pin 320, first end 321, second end 322, limiting block 323, spring 324, handle 325;

[0038] Curved plastic part 400, mating hole 410;

[0039] Material transfer assembly 500, gripper 510;

[0040] Shaping component 600, contouring part 610, clearance groove 611, heating rod 612, pressing part 620, pressing cylinder 630;

[0041] Pressure plate 700;

[0042] Lifting assembly 800, cylinder 810, top plate 820. Detailed Implementation

[0043] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0044] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0045] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0046] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0047] Reference Figures 1 to 16 The present invention discloses a thermoforming equipment for arc-shaped plastic parts, including a frame 100, a clamp 200, a shaping component 600, and multiple sets of material transfer components 500.

[0048] Among them, reference Figures 2 to 4 The frame 100 has multiple workstations arranged on it, including a loading workstation 110, a unloading workstation 130, and a thermoforming workstation 120 located between the loading workstation 110 and the unloading workstation 130. The clamp 200 can clamp both ends of the curved plastic part 400. Multiple sets of transfer components 500 are all horizontally slidably arranged on the frame 100. The transfer components 500 can clamp the clamp 200 and the curved plastic part 400 on the side opposite to the clamp 200 in the horizontal direction. The multiple sets of transfer components 500 can simultaneously slide back and forth between adjacent workstations.

[0049] In addition, refer to Figure 4 The shaping component 600 is disposed on the thermoforming station 120. The shaping component 600 includes a contouring part 610 and a plurality of pressing parts 620 disposed around the contouring part 610. The contouring part 610 can expand the arc-shaped plastic part 400. The pressing parts 620 can slide in the horizontal direction and press the arc-shaped plastic part 400 onto the contouring part 610. The plurality of pressing parts 620 can press the arc-shaped plastic part 400 in a clockwise or counterclockwise order. The pressing parts 620 can slide horizontally under the push of the pressing cylinder 630.

[0050] It can be understood that during processing, the two ends of the curved plastic part 400 can be clamped by the clamp 200, and then the curved plastic part 400 is placed in the loading station 110. The transfer component 500 can move horizontally and transfer the curved plastic part 400 from the previous station to the next station. Multiple transfer components 500 can move synchronously. After the transfer component 500 moves the curved plastic part 400 to the position of the shaping component 600, the contouring component 610 in the shaping component 600 can support the curved plastic part 400 and expand the curved plastic part 400 into the required shape. Then, multiple pressing components 620 can press the outer surface of the curved plastic part 400 in a clockwise or counterclockwise order to press the curved plastic part 400 onto the contouring component 610. In the thermoforming equipment for curved plastic parts of the present invention, the automatic transfer of curved plastic parts 400 at various workstations can be realized by the synchronous movement of multiple sets of material transfer components 500, which can improve thermoforming efficiency and save labor costs. In addition, multiple pushers 620 press the curved plastic parts 400 in sequence, so that the curved plastic parts 400 can fit more reliably with the contoured parts 610, preventing the curved plastic parts 400 from warping or uneven heating, and improving product consistency.

[0051] Reference Figure 2 Multiple thermoforming stations 120 are provided, all located between the loading station 110 and the unloading station 130. Multiple shaping components 600 are provided, each corresponding to one of the multiple thermoforming stations 120. The multiple thermoforming stations 120 are preheating station 121, heating station 122, and cooling station 123. Among them, the preheating station 121 is used to preheat the curved plastic part 400. The preheated curved plastic part 400 can be transferred by the material transfer component 500 to the heating station 122 for heating. Heating rods 612 are provided inside the contour part 610 on the preheating station 121 and the heating station 122. The heated curved plastic part 400 can be transferred by the material transfer component 500 to the cooling station 123 for cooling. Coolant can circulate inside the contour part 610 on the cooling station 123. By preheating, heating, and then cooling, the curved plastic part 400 can be better heated and deformed, and can be quickly cooled and shaped after deformation.

[0052] Reference Figure 3The material transfer assembly 500 in this embodiment of the invention includes two grippers 510 that can move vertically. The two grippers 510 can respectively hold the arc-shaped plastic part 400 and the fixture 200. The frame 100 is provided with a plurality of pressure plates 700 that can slide horizontally synchronously with the material transfer assembly 500. The plurality of pressure plates 700 correspond to a plurality of thermoforming stations 120. The pressure plates 700 can move vertically and press down on the upper end face of the arc-shaped plastic part 400. During processing, the gripper 510 can hold the curved plastic part 400 and the fixture 200 to transfer the curved plastic part 400 and the fixture 200 to the next station. Then, the transfer assembly 500 can slide synchronously with the pressure plate 700 a certain distance so that each pressure plate 700 is exactly located on each thermoforming station 120. Finally, the pressure plate 700 moves downward and presses down on the upper end face of the curved plastic part 400 so that the curved plastic part 400 is completely fitted onto the contour part 610.

[0053] It should be noted that after the curved plastic part 400 is completely fitted onto the contour part 610, a clearance can be provided on the contour part 610 to allow the gripper 510 to extend into the contour part 610 and clamp the curved plastic part 400 and the clamp 200. Of course, as... Figure 7 and Figure 8 As shown, in addition to the above methods, a lifting assembly 800 can also be provided on the frame 100. Specifically, the lifting assembly 800 may include a cylinder 810 and a top plate 820. The cylinder body of the cylinder 810 is mounted on the frame 100, and the piston rod of the cylinder 810 can push the top plate 820 to move. The top plate 820 can lift at least one of the curved plastic part 400 and the clamp 200 so that the end of the curved plastic part 400 is disengaged from the contour piece 610. Thereafter, the gripper 510 can clamp the curved plastic part 400 and the clamp 200 at the position where they are disengaged from the end of the contour piece 610. The lifting assembly 800, in conjunction with the pressure plate 700 structure, can realize the rapid engagement and disengagement between the curved plastic part 400 and the contour piece 610.

[0054] Reference Figure 9 A clearance hole is provided in the middle of the top plate 820. The profile part 610 passes through the clearance hole. The top plate 820 is located at the lower part of the profile part 610. When the arc-shaped plastic part 400 is fitted onto the profile part 610, the bottom end of the arc-shaped plastic part 400 and the bottom end of the clamp 200 are simultaneously attached to the upper surface of the top plate 820.

[0055] It is understandable that when the side of the curved plastic part 400 has a certain slope, the small end of the curved plastic part 400 can be placed with the large end facing up and the small end facing down. Correspondingly, the contour part 610 can also be set to a structure with the small end on top and the large end on the bottom, so as to facilitate the connection and disconnection between the curved plastic part 400 and the contour part 610.

[0056] like Figure 11 and Figure 16 As shown, the contoured part in this embodiment of the invention is provided with a clearance groove 611, and the clamp 200 is provided with a mounting part 231. When the clamp 200 clamps the arc-shaped plastic part 400, the mounting part 231 is located inside the arc-shaped plastic part 400, and the mounting part 231 can be inserted into the clearance groove 611. When the mounting part 231 is inserted into the clearance groove 611, the inner surface of the arc-shaped plastic part 400 can fit against the outer surface of the contoured part 610, which is beneficial to achieve uniform heating of the arc-shaped plastic part 400.

[0057] Reference Figure 11 The fixture 200 has two insertion gaps 210, which are located on two opposite end faces of the fixture 200. The two ends of the curved plastic part 400 can be inserted into the two insertion gaps 210. The fixture 200 is equipped with two sets of positioning components 300, which are mounted on the fixture 200 and correspond to the positions of the two insertion gaps 210. The positioning components 300 can restrict the ends of the curved plastic part 400 within the insertion gaps 210. Before processing, the two ends of the flat workpiece can be bent and inserted into the two insertion gaps 210. Then, the positioning components 300 restrict the two ends of the workpiece within the insertion gaps 210, thus establishing the curved plastic part 400 and the fixture 200 as an integral structure.

[0058] Understandably, referring to Figure 9 and Figure 11 The positioning component 300 includes a fixing block 310, which is mounted on the clamp 200 and located on the outside of the curved plastic part 400. Multiple positioning pins 320 pass through the fixing block 310. The clamp 200 has multiple sets of positioning hole assemblies corresponding to the positioning pins 320. Each positioning hole assembly includes a first positioning hole 221 and a second positioning hole 232 coaxially arranged. The first positioning hole 221 and the second positioning hole 232 within the same group are located on both sides of the insertion gap 210. The positioning pins 320 can pass through the first positioning hole 221, the curved plastic part 400, and the second positioning hole 232 sequentially. It should be noted that the curved plastic part 400 often has mating holes 410 to facilitate assembly with other product components, such as... Figure 15 As shown, these mating holes 410 can be used to achieve a fixed connection between the curved plastic part 400 and the fixture 200 when they are installed. Of course, if the curved plastic part 400 does not have mating holes 410, mating holes 410 can be made at positions corresponding to the positioning hole assembly. Specifically, the mating hole 410 can be an oblong hole to prevent the curved plastic part 400 from failing to fit into the contour part 610 due to dimensional deviations caused during machining.

[0059] Reference Figures 9 to 13The clamp 200 includes a first clamping plate 220 and a second clamping plate 230. An insertion gap 210 is formed between the first clamping plate 220 and the second clamping plate 230. The middle portions of the first clamping plate 220 and the second clamping plate 230 are connected to each other by fasteners. A fixing block 310 and a first positioning hole 221 are disposed on the first clamping plate 220, and a mounting part 231 and a second positioning hole 232 are disposed on the second clamping plate 230. When the side of the curved plastic part 400 has a certain slope, the insertion gap 210 can be tilted. It is understood that the clamp 200 can also be configured as a single piece, but dividing the clamp 200 into a first clamping plate 220 and a second clamping plate 230 facilitates adjustment of the thickness of the insertion gap 210 to accommodate curved plastic parts 400 of different thicknesses.

[0060] In addition, refer to Figure 12 and Figure 13 In the embodiments of the present invention, the first clamping plate 220 and the second clamping plate 230 are provided with a plurality of waist-shaped hollow slots 240. The hollow slots 240 can reduce the weight of the first clamping plate 220 and the second clamping plate 230. In some embodiments, the gripper 510 can hold the clamp 200 at the hollow slot 240.

[0061] It is understandable that, such as Figure 9 , Figure 11 and Figure 14As shown, in this embodiment of the invention, the fixing block 310 is provided with a through hole 311, a mounting groove 312 and a limiting groove 313 that are connected to each other in sequence. The positioning pin 320 has a first end 321 and a second end 322. The first end 321 of the positioning pin 320 passes through the through hole 311, and the second end 322 of the positioning pin 320 passes through the limiting groove 313 and can be inserted into the first positioning hole 221 and the second positioning hole 232. A square limiting block 323 is provided in the middle of the positioning pin 320. The limiting block 323 is slidably accommodated in the limiting groove 313. The height of the limiting block 323 can be set to be adapted to the height of the limiting groove 313 so that the limiting block 323 can slide in the limiting groove 313. A spring 324 is sleeved between the positioning pin 320 and the limiting block 323 and the first end 321. The two ends of the spring 324 abut against the end face of the limiting block 323 and the inner surface of the mounting groove 312, respectively. The outer diameter of the spring 324 is larger than the inner diameter of the through hole 311, and the height of the limiting block 323 is larger than the outer diameter of the spring 324. In use, the first end 321 of the positioning pin 320 can be pulled first, so that the second end 322 of the positioning pin 320 disengages from the first positioning hole 221 and the second positioning hole 232. Then, the end of the arc-shaped plastic part 400 is inserted into the insertion gap 210. Finally, the positioning pin 320 is released, so that the positioning pin 320 returns to its original position under the elastic restoring force of the spring 324 and is inserted into the first positioning hole 221, the mating hole 410 on the arc-shaped plastic part 400, and the second positioning hole 232 in sequence. In addition, it should be noted that the mounting groove 312 may be a blind groove opened on the side of the fixing block 310, so as to facilitate the machining of the fixing block 310 and the installation of the positioning pin 320.

[0062] Understandably, a handle 325 can be provided at the first end 321 of the locating pin 320 to facilitate the assembler to pull the locating pin 320. The handle 325 and the first end 321 can be connected by threads.

[0063] Reference Figure 1 and Figure 5 In this embodiment of the invention, the loading station 110 is provided with a turntable 111, and two receiving parts 112 are provided on the turntable 111. The two receiving parts 112 are arranged at a 180° angle at both ends of the turntable 111. The receiving parts 112 can receive the arc-shaped plastic parts 400 connected to the clamps 200. A baffle 140 is installed on the frame 100. The baffle 140 is located above the turntable 111 and between the two receiving parts 112.

[0064] like Figure 1 As shown, the unloading station 130 in this embodiment of the invention is provided with an unloading conveyor belt 150. The unloading conveyor belt 150 extends along two adjacent sides of the frame 100. The unloading conveyor belt 150 can be arranged in a corner shape with a corner angle of 90°, which can save equipment space.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. Hot forming apparatus for arc-shaped plastic parts, characterized in that, The utility model relates to a hot forming device for arc-shaped plastic parts, comprising: a rack arranged with multiple workstations, the multiple workstations including a feeding workstation, a discharging workstation, and a hot forming workstation between the feeding workstation and the discharging workstation; a clamp capable of clamping two ends of an arc-shaped plastic part, the clamp being provided with two insertion gaps, the two insertion gaps being respectively located on two opposite end faces of the clamp, the two ends of the arc-shaped plastic part being capable of being inserted into the two insertion gaps, the clamp being provided with two sets of positioning assemblies, the two sets of positioning assemblies being installed on the clamp and corresponding to the positions of the two insertion gaps, the positioning assemblies being capable of limiting the ends of the arc-shaped plastic part in the insertion gaps, the positioning assemblies including a fixed block, the fixed block being located on the clamp and outside the arc-shaped plastic part, the fixed block being provided with multiple positioning pins, the clamp being provided with multiple sets of positioning hole assemblies corresponding to the multiple positioning pins, the positioning hole assemblies including coaxially arranged first positioning holes and second positioning holes, the first positioning holes and the second positioning holes in the same set being respectively located on the two sides of the insertion gaps, the positioning pins being capable of sequentially passing through the first positioning holes, the arc-shaped plastic part, and the second positioning holes; multiple sets of material moving assemblies, each being horizontally slidably arranged on the rack, the material moving assemblies being capable of clamping the clamp and the arc-shaped plastic part on the side opposite to the clamp in the horizontal direction, the multiple sets of material moving assemblies being capable of synchronously reciprocating between adjacent workstations; a shaping assembly arranged on the hot forming workstation, the shaping assembly including a profiling piece and multiple pushers arranged around the profiling piece, the profiling piece being capable of expanding the arc-shaped plastic part, the pushers being capable of sliding in the horizontal direction and pressing the arc-shaped plastic part against the profiling piece, the multiple pushers being capable of sequentially pressing the arc-shaped plastic part in clockwise or counterclockwise order.

2. The arc of plastic parts hot forming apparatus of claim 1, wherein, The hot forming workstation is provided with multiple sets and is located between the feeding workstation and the discharging workstation, the shaping assembly is provided with multiple sets and corresponds to the multiple hot forming workstations, the multiple hot forming workstations are respectively a preheating workstation, a heating workstation, and a cooling workstation.

3. The arc of plastic parts hot forming apparatus of claim 2, wherein, The material moving assembly includes two clamping jaws capable of moving in the vertical direction, the two clamping jaws being capable of respectively clamping the arc-shaped plastic part and the clamp, the rack being provided with multiple press plates capable of synchronously horizontally sliding with the material moving assembly, the multiple press plates corresponding to the multiple hot forming workstations, the press plates being capable of moving in the vertical direction and pressing the upper end face of the arc-shaped plastic part.

4. The arc of plastic part hot forming apparatus of claim 1, wherein, The profiling piece is provided with a clearance groove, the clamp is provided with a mounting portion, the mounting portion being located inside the arc-shaped plastic part, the mounting portion being capable of being inserted into the clearance groove.

5. The arc of plastic part hot forming apparatus of claim 4, wherein, The clamp includes a first clamping plate and a second clamping plate, the insertion gap being formed between the first clamping plate and the second clamping plate, the middle part of the first clamping plate and the middle part of the second clamping plate being connected to each other by a fastener, the fixed block and the first positioning holes being arranged on the first clamping plate, the mounting portion and the second positioning holes being arranged on the second clamping plate.

6. The arc of plastic parts hot forming apparatus of claim 1, wherein, The fixing block is provided with a perforation, a mounting slot and a limiting slot which are sequentially communicated with each other, the positioning pin has a first end and a second end, the first end of the positioning pin passes through the perforation, the second end of the positioning pin passes through the limiting slot and can be inserted into the first positioning hole and the second positioning hole, a square limiting block is arranged at the middle part of the positioning pin, the limiting block is slidingly accommodated in the limiting slot, a spring is sleeved on the positioning pin between the limiting block and the first end, the two ends of the spring are respectively abutted against the end face of the limiting block and the inner surface of the mounting slot, the outer diameter of the spring is greater than the inner diameter of the perforation, and the height of the limiting block is greater than the outer diameter of the spring.

7. The arc of plastic parts hot forming apparatus of claim 1, wherein, The jacking assembly includes a cylinder and a top plate, the cylinder body of the cylinder is mounted on the rack, the piston rod of the cylinder can push the top plate to move, and the top plate can jack up at least one of the arc-shaped plastic piece and the clamp to make the end of the arc-shaped plastic piece out of the profiling piece.

8. The arc of plastic parts hot forming apparatus of claim 1, wherein, The feeding station is provided with a rotating disc, two receiving members are arranged on the rotating disc, the two receiving members are arranged at two ends of the rotating disc at an angle of 180°, the receiving members can receive the arc-shaped plastic piece connected with the clamp, a baffle is mounted on the rack, the baffle is located above the rotating disc and between the two receiving members.

Images