Plastic acoustic enclosure thermoforming apparatus

Abstract

This invention discloses a thermoforming equipment for plastic speaker housings, comprising: a frame with a loading station and a processing station, the processing station for forming the housing workpiece, the frame having a sliding groove extending in the front-to-back direction at the processing station; a transfer device including a slide rail, a transfer component, and a linear module, the slide rail slidingly engaging with the sliding groove, the transfer component mounted on the slide rail for gripping or releasing the housing workpiece, and the linear module mounted on the frame for reciprocating movement of the slide rail to move the transfer component back and forth between the loading station and the processing station; a guide rail mounted on the frame and located at the loading station, extending in the left-to-right direction; and multiple loading frames arranged in the left-to-right direction on the guide rail for holding the housing workpieces. This invention achieves continuous loading by sequentially moving multiple loading frames to the loading area, thereby improving processing efficiency and reducing processing costs.

Description

Technical Field

[0001] This invention relates to the field of thermoforming equipment, and in particular to a thermoforming equipment for plastic speaker housings. Background Technology

[0002] Existing speaker housings are mostly made of plastic, a material that is easy to mold into various curved surfaces to enhance the speaker's appearance. However, for curved plastic workpieces such as speaker housings, existing processing equipment relies on manual or robotic loading and unloading, resulting in low processing efficiency. For example, Chinese invention patent CN113829426B discloses a curved workpiece cutting device. During processing, the curved workpiece needs to be placed on a frame and positioned by a first and second positioning component before subsequent processing can begin. Therefore, existing processing equipment for curved housing workpieces cannot achieve automatic loading, resulting in low processing efficiency and high processing costs. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a thermoforming device for plastic speaker housings, which can achieve automatic feeding, improve processing efficiency, and reduce processing costs.

[0004] According to an embodiment of the present invention, a plastic speaker shell thermoforming equipment includes: a frame having a loading station and a processing station, the loading station being located behind the processing station, the processing station being used to form the shell workpiece, and the frame having a sliding groove extending in a front-rear direction at the processing station; a transfer device including a slide rail, a material transfer component, and a linear module, the slide rail extending in a front-rear direction and slidingly engaging with the sliding groove, the material transfer component being disposed on the slide rail and capable of gripping or releasing the shell workpiece, and the linear module being mounted on the frame. On the frame, the linear module is configured to drive the slide rail to reciprocate in the front-to-back direction so that the material transfer component reciprocates between the loading station and the processing station. The loading station has a loading area, the position of which corresponds to the material transfer component. A guide rail is disposed on the frame and located at the loading station, and the guide rail extends in the left-to-right direction. Multiple loading frames are arranged in the left-to-right direction on the guide rail. The loading frames are used to hold the outer shell workpiece, and the multiple loading frames can slide synchronously in the left-to-right direction to be located in the loading area in sequence.

[0005] The invention offers at least the following advantages: During processing, multiple outer shell workpieces can be placed in multiple loading frames. The linear module drives the slide rail to slide in the front-to-back direction, allowing the transfer component to reciprocate between the loading station and the processing station. The transfer component continuously transfers the outer shell workpieces in the loading frame located in the loading area to the processing station. When the transfer component picks up the last outer shell workpiece in the loading frame in the loading area and moves it to the processing station, the transfer device is not in the loading area at this time. Therefore, the transfer device will not obstruct the translation of the loading frame. Multiple loading frames can use this time interval to synchronously translate in the left-to-right direction so that the next loading frame containing an outer shell workpiece can move to the loading area. Since neither the slide rail nor the transfer device used for loading will stop the loading frame when it moves, the plastic speaker shell thermoforming equipment of this invention achieves continuous loading by sequentially moving multiple loading frames to the loading area, thereby improving processing efficiency and reducing processing costs.

[0006] According to some embodiments of the present invention, the feeding station further includes a replenishment area, with the replenishment area on both the left and right sides of the feeding area. When one of the feeding frames is located in the feeding area, the other feeding frames are located in the replenishment area.

[0007] According to some embodiments of the present invention, the processing station includes a heating station and a cooling station, both of which have a forming device. The forming device includes an arc-shaped support mold and a forming assembly. Both the arc-shaped support mold and the forming assembly are mounted on the frame. The arc-shaped support mold is used to support the outer shell workpiece and heat or cool it. The forming assembly is used to press the outer shell workpiece against the surface of the arc-shaped support mold. The material transfer assembly is used to transfer the outer shell workpiece from the loading station to the heating station. A clamping assembly is also provided on the slide rail, which is used to transfer the outer shell workpiece from the heating station to the cooling station.

[0008] According to some embodiments of the present invention, the arc-shaped support mold is cylindrical and extends in the front-to-back direction. The circumferential surface of the arc-shaped support mold is an arc surface. The forming assembly includes five first pressing mechanisms. All five first pressing mechanisms are perpendicular to the circumferential surface of the arc-shaped support mold. One of the first pressing mechanisms is located directly above the arc-shaped support mold, and the other four first pressing mechanisms are located at the upper left, lower left, upper right, and lower right of the arc-shaped support mold, respectively. When the five first pressing mechanisms press the outer shell workpiece, the first pressing mechanism directly above first presses down on the outer shell workpiece first, then the two first pressing mechanisms at the upper left and upper right simultaneously press down on the outer shell workpiece, and finally the two first pressing mechanisms at the lower left and lower right simultaneously press down on the outer shell workpiece.

[0009] According to some embodiments of the present invention, the transfer device is provided in two sets, and the two sets of transfer devices are symmetrically arranged on the left and right sides of the arc-shaped support mold.

[0010] According to some embodiments of the present invention, the clamping assembly includes two clamping mechanisms, which are respectively disposed on two sets of transfer devices. Each clamping mechanism includes a base and a jaw. The base is disposed on the slide rail, and the jaw is slidably disposed on the base in the left-right direction. The jaw can open and close in the left-right direction to release or clamp the rear end of the outer shell workpiece on the arc-shaped support mold. The two jaws can move in opposite directions in the left-right direction and open the rear end of the outer shell workpiece.

[0011] According to some embodiments of the present invention, the processing station further includes a preheating station located between the heating station and the loading station. The frame is provided with a planar support mold and a second pressing mechanism at the preheating station. The second pressing mechanism is used to press the outer shell workpiece onto the planar support mold. The planar support mold is used to preheat the outer shell workpiece. Two sets of transfer components are provided. One set of transfer components is used to transfer the outer shell workpiece from the loading station to the preheating station, and the other set of transfer components is used to transfer the outer shell workpiece from the preheating station to the heating station.

[0012] According to some embodiments of the present invention, the material transfer assembly includes a bracket and a plurality of suction cups, the plurality of suction cups being arranged in a front-to-back direction on the bracket, the bracket being disposed on the slide rail, and the suction cups being connected to a negative pressure source and capable of adsorbing the outer shell workpiece in the loading frame or the outer shell workpiece on the planar support mold.

[0013] According to some embodiments of the present invention, the loading frame has a base plate, a lifting plate and multiple surrounding plates. The base plate is slidably disposed on the guide rail. The center of the base plate has a hollow area. The multiple surrounding plates are vertically disposed on the upper surface of the base plate and arranged around the hollow area. The lifting plate is slidably disposed on the base plate in a vertical direction. The lifting plate is used to support multiple shell workpieces.

[0014] According to some embodiments of the present invention, the frame is provided with a plurality of pulleys, the axis of the pulleys is arranged in the left-right direction, the pulleys are rotatable about their own axis, and the pulleys are used to support the slide rail below the slide rail.

[0015] 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

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A magnified schematic diagram of the local structure at point A;

[0019] Figure 3 for Figure 1 A magnified view of the structure at point B in the middle;

[0020] Figure 4 This is a schematic diagram of the structure of the clamping assembly in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the clamping mechanism in an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the material transfer assembly in an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the molding device in an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the structure at the mating position of the fixing block and the slide rail in an embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of the structure at the position where the pulley and the slide rail meet in an embodiment of the present invention.

[0026] Icon labels:

[0027] Frame 100, loading station 110, loading area 111, replenishing area 112, processing station 120, preheating station 121, heating station 122, cooling station 123, flat support mold 130, second pressing mechanism 140, pulley 150, fixing block 160, slide 161;

[0028] Guide rail 200;

[0029] Forming device 300, arc-shaped support mold 310, first pressing mechanism 320;

[0030] Transfer device 400, slide rail 410, material transfer assembly 420, bracket 421, suction cup 422, linear module 430;

[0031] Clamping assembly 500, clamping mechanism 510, base 511, gripper 512, first cylinder 513, push plate 514, second cylinder 515;

[0032] 600 for the loading frame, 610 for the base plate, 620 for the lifting plate, and 630 for the surrounding plate;

[0033] Shell part 700. Detailed Implementation

[0034] 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.

[0035] In the description of this invention, it should be understood that the orientation descriptions, such as front, back, up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0036] 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.

[0037] 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.

[0038] Reference Figures 1 to 9 The present invention discloses a thermoforming equipment for plastic speaker shells, including a frame 100, a transfer device 400, a guide rail 200 and multiple feeding frames 600.

[0039] The frame 100 includes a loading station 110 and a processing station 120. The loading station 110 is located behind the processing station 120, which is used to form the outer shell workpiece 700. The frame 100 has a sliding groove 161 extending in the front-to-back direction at the processing station 120. The transfer device 400 includes a slide rail 410, a material transfer assembly 420, and a linear module 430. The slide rail 410 extends in the front-to-back direction and slides in cooperation with the sliding groove 161. The material transfer assembly 420 is mounted on the slide rail 410 and can grab or release the outer shell workpiece 700. The linear module 430 is mounted on the frame 100. The line module 430 is configured to drive the slide rail 410 to slide back and forth in the front and back direction so that the transfer component 420 moves back and forth between the loading station 110 and the processing station 120. The loading station 110 has a loading area 111, the position of which corresponds to the transfer component 420. The guide rail 200 is set on the frame 100 and located at the loading station 110. The guide rail 200 extends in the left and right direction. Multiple loading frames 600 are arranged in the left and right direction on the guide rail 200. The loading frames 600 are used to hold the shell workpiece 700. The multiple loading frames 600 can slide synchronously in the left and right direction to be located in the loading area 111 in sequence.

[0040] Understandably, during processing, multiple shell workpieces 700 can be placed in multiple loading frames 600. The linear module 430 can drive the slide rail 410 to slide in the front-back direction, thereby causing the transfer component 420 to move back and forth between the loading station 110 and the processing station 120. The transfer component 420 can continuously transfer the shell workpieces 700 in the loading frame 600 located in the loading area 111 to the processing station 120. When the transfer device 400 grabs the last shell workpiece 700 in the loading frame 600 in the loading area 111 and moves the shell workpiece 700 to the processing station 120, the transfer device 400 is not in the loading area 111 at this time. Therefore, the transfer device 400 will not block the translation of the loading frame 600. Multiple loading frames 600 can use this time interval to move synchronously in the left-right direction so that the next loading frame 600 containing the shell workpiece 700 can move to the loading area 111. Since neither the slide rail 410 nor the transfer device 400 used for feeding will stop at the feeding frame 600 when it moves, the plastic speaker shell thermoforming equipment of the present invention achieves continuous feeding by sequentially moving multiple feeding frames 600 to the feeding area 111, thereby improving processing efficiency and reducing processing costs.

[0041] It should be noted that the shell workpiece 700 located in the loading frame 600 is a flat shell workpiece 700. After the flat shell workpiece 700 is picked up by the transfer device 400 and moved to the processing station, it will undergo a forming process and finally become the shell workpiece 700 with the required curvature.

[0042] like Figure 2 As shown in this embodiment of the invention, the loading station 110 further includes a replenishment area 112. The left and right sides of the loading area 111 are both replenishment areas 112. When one loading frame 600 is located in the loading area 111, the other loading frames 600 are located in the replenishment areas 112. Therefore, when one loading frame 600 is located in the loading area 111, the operator can fill the loading frames 600 located in the replenishment areas 112 with the outer shell workpiece 700. Multiple outer shell workpieces 700 can be stacked vertically within the loading frames 600. Multiple loading frames 600 can move in the opposite direction after reaching their endpoint, thus reciprocating in the left-right direction for continuous material supply.

[0043] like Figure 1 As shown, the processing station 120 in this embodiment of the invention includes a heating station 122 and a cooling station 123. Both the heating station 122 and the cooling station 123 have a forming device 300. The forming device 300 includes an arc-shaped support mold 310 and a forming assembly. The arc-shaped support mold 310 and the forming assembly are both mounted on the frame 100. The arc-shaped support mold 310 is used to support the outer shell workpiece 700 and to heat or cool the outer shell workpiece 700. The forming assembly is used to press the outer shell workpiece 700 tightly onto the surface of the arc-shaped support mold 310. The material transfer assembly... Part 420 is used to transfer the outer shell workpiece 700 from the loading station 110 to the heating station 122. The heating station 122 can heat the outer shell workpiece 700 so that the outer shell workpiece 700 is deformed by heat and becomes the required shape. The slide rail 410 is also provided with a clamping assembly 500. The clamping assembly 500 is used to transfer the outer shell workpiece 700 on the heating station 122 to the cooling station 123. The cooling station 123 can cool the thermoformed outer shell workpiece 700 so that the outer shell workpiece 700 can be cooled down quickly to maintain the current shape.

[0044] Reference Figure 4 and Figure 7In this embodiment of the invention, the arc-shaped support mold 310 is columnar and extends in the front-to-back direction. The circumferential surface of the arc-shaped support mold 310 is an arc surface. The arc surface of the arc-shaped support mold 310 can be the curved shape of the required shell workpiece 700. The material transfer assembly 420 can place the planar shell workpiece 700 on the upper surface of the arc-shaped support mold 310. The molding assembly includes five first pressing mechanisms 320, all of which are perpendicular to the circumferential surface of the arc-shaped support mold 310. One first pressing mechanism 320 is located directly above the arc-shaped support mold 310, while the other four first pressing mechanisms 320 are located at the upper left, lower left, upper right, and lower right of the arc-shaped support mold 310, respectively. When the five first pressing mechanisms 320 press the outer shell workpiece 700, the first pressing mechanism 320 directly above first presses down on the outer shell workpiece 700 first, then the two first pressing mechanisms 320 at the upper left and upper right simultaneously press down on the outer shell workpiece 700, and finally the two first pressing mechanisms at the lower left and lower right simultaneously press down on the outer shell workpiece 700. By installing the first pressing mechanisms 320 in the above sequence, the outer shell workpiece 700 can be pressed down from the upper right to the lower right, allowing the outer shell workpiece 700 to better fit the arc-shaped circumferential surface of the arc-shaped support mold 310.

[0045] In this embodiment of the invention, the transfer device 400 can be provided in two sets. The two sets of transfer devices 400 are symmetrically arranged on the left and right sides of the arc-shaped support mold 310. The material transfer components 420 on the two sets of transfer devices 400 can symmetrically grasp the left and right edges of the outer shell workpiece 700.

[0046] like Figure 4 and Figure 5As shown, the clamping assembly 500 in this embodiment of the invention includes two clamping mechanisms 510, which are respectively disposed on two sets of transfer devices 400. Each clamping mechanism 510 includes a base 511 and a gripper 512. The base 511 is disposed on the slide rail 410, and the gripper 512 is slidably disposed on the base 511 in the left-right direction. The gripper 512 can open and close in the left-right direction to release or clamp the rear end of the outer shell workpiece 700 on the arc-shaped support mold 310. The two grippers 512 can move in opposite directions in the left-right direction and open the rear end of the outer shell workpiece 700. After the outer shell workpiece 700 completes the heating or cooling forming steps on the arc-shaped support mold 310, it needs to be transferred to the next station. At this time, the grippers 512 in the two sets of clamping mechanisms 510 move towards each other. After the two grippers 512 clamp the rear end of the outer shell workpiece 700, they move in opposite directions a certain distance, so that the outer shell workpiece 700 is slightly spread at a certain angle at its rear position. Then, the slide rail 410 moves forward and synchronously drives the clamping mechanism 510 and the outer shell workpiece 700 forward, which realizes the operation of transferring the outer shell workpiece 700 to the next station. It should be noted that after the outer shell workpiece 700 is cooled at the cooling station 123, it is shaped and can be moved to the unloading station (not shown in the figure) by clamping the outer shell workpiece 700 at the cooling station 123 through the clamping mechanism 510.

[0047] It should be noted that, referring to Figure 5 A first cylinder 513 can be installed on the base 511 of the clamping mechanism 510. The piston rod of the first cylinder 513 is connected to a push plate 514. The first cylinder 513 can push the push plate 514 horizontally in the left and right direction. A second cylinder 515 and a first chuck are installed on the push plate 514. The piston rod of the second cylinder 515 is connected to a second chuck. The second cylinder 515 can push the second chuck in the left and right direction so that the second chuck presses the rear end of the outer shell workpiece 700 onto the first chuck.

[0048] like Figure 1 As shown, in this embodiment of the invention, the processing station 120 further includes a preheating station 121, which is located between the heating station 122 and the loading station 110. The preheating station 121 is used to preheat the outer shell workpiece 700. The heating temperature of the preheating station 121 is lower than that of the heating station 122. The frame 100 is provided with a flat support mold 130 and a second pressing mechanism 140 at the preheating station 121. The second pressing mechanism 140 is used to press the outer shell workpiece 700 onto the flat support mold 130. The flat support mold 130 is used to preheat the outer shell workpiece 700. The transfer assembly 420 is provided with two sets. One set of transfer assemblies 420 is used to transfer the outer shell workpiece 700 from the loading station 110 to the preheating station 121, and the other set of transfer assemblies 420 is used to transfer the outer shell workpiece 700 from the preheating station 121 to the heating station 122.

[0049] like Figure 6 As shown, the material transfer assembly 420 in this embodiment of the invention includes a bracket 421 and multiple suction cups 422. The multiple suction cups 422 are arranged on the bracket 421 in the front-to-back direction. The bracket 421 is mounted on a slide rail 410. The suction cups 422 are connected to a negative pressure source and can adsorb the outer shell workpiece 700 in the loading frame 600 or the outer shell workpiece 700 on the flat support mold 130. In addition, the loading frame 600 has a base plate 610, a lifting plate 620 and multiple surrounding plates 630. The base plate 610 is slidably mounted on the guide rail 200. The center of the base plate 610 has a hollow area (not shown in the figure). The multiple surrounding plates 630 are all vertically mounted on the upper surface of the base plate 610 and arranged around the hollow area. The lifting plate 620 is slidably mounted on the base plate 610 in the vertical direction and is used to support multiple outer shell workpieces 700. The enclosure 630 can restrict the outer shell workpiece 700 and prevent the outer shell workpiece 700 from moving around in the loading frame 600. After each outer shell workpiece 700 is removed, the lifting plate 620 can move upward a certain distance so that the uppermost outer shell workpiece 700 corresponds to the adsorption surface of the suction cup 422.

[0050] like Figure 9 As shown, in this embodiment of the invention, the frame 100 is provided with a plurality of pulleys 150. The axis of the pulleys 150 is arranged in the left-right direction, and the pulleys 150 can rotate around their own axes. The pulleys 150 are used to support the slide rail 410 below it. By setting the pulleys 150, the sliding of the slide rail 410 can be made more stable. In addition, refer to Figure 8 Multiple fixing blocks 160 can also be set on the frame 100, and the multiple fixing blocks 160 are arranged in the front-back direction. The slide groove 161 can be opened on the fixing block 160.

[0051] 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.

[0052] 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. A thermoforming equipment for plastic speaker housings, characterized in that, include: The machine frame is equipped with a loading station and a processing station. The loading station is located behind the processing station. The processing station is used to form the outer shell workpiece. The machine frame has a sliding groove extending in the front-to-back direction at the processing station. The processing station includes a heating station and a cooling station. Both the heating station and the cooling station have a forming device. The forming device includes an arc-shaped support mold and a forming assembly. The arc-shaped support mold and the forming assembly are both mounted on the machine frame. The arc-shaped support mold is used to support the outer shell workpiece and heat or cool it. The forming assembly is used to press the outer shell workpiece tightly against the surface of the arc-shaped support mold. A transfer device includes a slide rail, a transfer assembly, and a linear module. The slide rail extends in a front-to-back direction and slides in cooperation with a groove. The transfer assembly is mounted on the slide rail and can grip or release the outer shell workpiece. The linear module is mounted on the frame and configured to drive the slide rail to reciprocate in a front-to-back direction, causing the transfer assembly to reciprocate between a loading station and a processing station. The loading station has a loading area, the position of which corresponds to the transfer assembly. The transfer assembly is used to transfer the outer shell workpiece from the loading station to the heating station. A clamping assembly is also provided on the slide rail, used to transfer the outer shell workpiece from the heating station to the cooling station. The device is provided with two sets of transfer devices, which are symmetrically arranged on the left and right sides of the arc-shaped support mold. The clamping assembly includes two clamping mechanisms, which are respectively arranged on the two sets of transfer devices. Each clamping mechanism includes a base and a jaw. The base is arranged on the slide rail, and the jaw is slidably arranged on the base in the left and right direction. The jaw can open and close in the left and right direction to release or clamp the rear end of the outer shell workpiece on the arc-shaped support mold. After the two jaws clamp the rear end of the outer shell workpiece, the two jaws move in opposite directions a certain distance, causing the outer shell workpiece to open at a certain angle at its rear position. The slide rail moves forward and synchronously drives the clamping mechanism and the outer shell workpiece to move forward, so as to realize the transfer of the outer shell workpiece. A guide rail is provided on the frame and located at the loading station, and the guide rail extends in the left-right direction; Multiple loading frames are arranged on the guide rail in a left-right direction. The loading frames are used to hold the outer shell workpiece. The multiple loading frames can slide synchronously in the left-right direction to be located in the loading area in sequence.

2. The thermoforming equipment for plastic speaker housings according to claim 1, characterized in that, The loading station also includes a replenishment area, with the replenishment area located on both the left and right sides of the loading area. When one of the loading frames is located in the loading area, the other loading frames are located in the replenishment area.

3. The thermoforming equipment for plastic speaker housings according to claim 1, characterized in that, The arc-shaped support mold is cylindrical and extends in the front-to-back direction. The circumferential surface of the arc-shaped support mold is an arc surface. The forming component includes five first pressing mechanisms. All five first pressing mechanisms are perpendicular to the circumferential surface of the arc-shaped support mold. One of the first pressing mechanisms is located directly above the arc-shaped support mold. The other four first pressing mechanisms are located at the upper left, lower left, upper right, and lower right of the arc-shaped support mold, respectively. When the five first pressing mechanisms press the outer shell workpiece, the first pressing mechanism directly above first presses down on the outer shell workpiece first. Then, the two first pressing mechanisms at the upper left and upper right simultaneously press down on the outer shell workpiece. Finally, the two first pressing mechanisms at the lower left and lower right simultaneously press down on the outer shell workpiece.

4. The thermoforming equipment for plastic speaker housings according to claim 1, characterized in that, The processing station also includes a preheating station, which is located between the heating station and the loading station. The frame is provided with a flat support mold and a second pressing mechanism at the preheating station. The second pressing mechanism is used to press the shell workpiece onto the flat support mold. The flat support mold is used to preheat the shell workpiece. Two sets of transfer components are provided. One set of transfer components is used to transfer the shell workpiece from the loading station to the preheating station, and the other set of transfer components is used to transfer the shell workpiece from the preheating station to the heating station.

5. The thermoforming equipment for plastic speaker housings according to claim 4, characterized in that, The material transfer assembly includes a bracket and multiple suction cups. The multiple suction cups are arranged on the bracket in a front-to-back direction. The bracket is set on the slide rail. The suction cups are connected to a negative pressure source and can adsorb the outer shell workpiece in the loading frame or the outer shell workpiece on the planar support mold.

6. A thermoforming apparatus for plastic speaker housings according to any one of claims 1 to 5, characterized in that, The loading frame has a base plate, a lifting plate, and multiple surrounding plates. The base plate is slidably mounted on the guide rail and has a hollow area in the middle. The multiple surrounding plates are vertically mounted on the upper surface of the base plate and arranged around the hollow area. The lifting plate is slidably mounted on the base plate in a vertical direction and is used to support multiple shell workpieces.

7. A thermoforming apparatus for plastic speaker housings according to any one of claims 1 to 5, characterized in that, The frame is equipped with multiple pulleys, the axis of which is set in the left-right direction. The pulleys can rotate around their own axes and are used to support the slide rail below.

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