A plastic packaging device

Abstract

The utility model discloses a kind of plastic packaging devices, suitable for preset position injection molding of workpiece and form injection molding structure, comprising: support platform;Injection mold, the injection mold is installed in the support platform, the injection mold has installation groove and injection slot;Carrier, the carrier is suitable for installation in the installation groove, the top of the carrier has limit slot;The workpiece has fixed end and injection end, the shape of the fixed end is compatible with the shape of the limit slot, when the fixed end is installed in the limit slot, the injection end extends to the injection slot.The carrier of the plastic packaging device can accommodate the fixed end of workpiece, can effectively fix workpiece, so as to improve the precision of injection molding structure forming in workpiece injection end when injection molding forms injection molding structure, improve the qualified rate of formed plastic packaging product.

Description

Technical Field

[0001] This utility model relates to the field of plastic coating, and further to a plastic coating device. Background Technology

[0002] Plastic coating is a process in which a plastic injection structure is formed at a predetermined location on a workpiece to encapsulate the workpiece, thereby connecting the workpiece to the plastic injection structure to form a plastic-coated product.

[0003] In PVC coating products, coating accuracy is crucial, directly determining the product's quality and performance. Current coating equipment, especially when the workpiece shape is irregular, struggles to effectively position the workpiece during injection molding, significantly impacting coating accuracy.

[0004] On the other hand, when using existing coating equipment for coating operations, manual demolding is usually required after coating is completed. This is not only inefficient, but also makes it difficult to apply force evenly to the coated product during demolding, which can easily cause damage to the coated product due to uneven force. Utility Model Content

[0005] To address the aforementioned technical problems, the purpose of this utility model is to provide a plastic coating device. The carrier of the plastic coating device can accommodate the fixed end of the workpiece and effectively fix the workpiece, thereby improving the accuracy of the injection molding of the injection structure at the injection end of the workpiece during injection molding and increasing the pass rate of the formed plastic-coated products.

[0006] To achieve the above objectives, the present invention aims to provide a plastic coating device suitable for injection molding a structure at a preset position on a workpiece, comprising:

[0007] Support platform;

[0008] The injection mold is mounted on the support platform and has an installation groove and an injection groove.

[0009] A carrier adapted to be installed in the mounting slot, the top of the carrier having a limiting slot;

[0010] The workpiece has a fixed end and an injection end. The shape of the fixed end is adapted to the shape of the limiting groove. When the fixed end is installed in the limiting groove, the injection end extends into the injection groove.

[0011] In some embodiments, the plastic coating device further includes a plurality of positioning posts disposed on the bottom surface of the mounting groove, the bottom of the carrier has a plurality of positioning grooves, and when the carrier is installed in the mounting groove, the plurality of positioning posts are installed in the plurality of positioning grooves.

[0012] In some embodiments, a plurality of the positioning posts pass through the injection mold and are movable up and down relative to the injection mold along the height direction of the injection mold, and the plurality of positioning posts form a first lifting mechanism;

[0013] The plastic coating device further includes a second lifting mechanism disposed on the top of the support platform, the position of the second lifting mechanism corresponding to the position of the injection molding groove;

[0014] After injection molding is completed, the first lifting mechanism and the second lifting mechanism can drive the carrier, the workpiece, and the injection molding structure to separate from the injection mold when they move.

[0015] In some embodiments, the injection mold includes a first injection module and a second injection module, the first injection module and the second injection module being slidably mounted on the top of the support platform;

[0016] The injection groove is formed between the first injection module and the second injection module; in the mold closed state, the first injection module and the second injection module are close to each other, and in the mold open state, the first injection module and the second injection module are far apart from each other;

[0017] The mounting groove is formed on the top of the first injection molding module; the first injection molding module has a plurality of sliding holes corresponding to the position of the positioning post, and the plurality of positioning posts extend through the sliding holes toward the carrier; when the first injection molding module slides relative to the support platform, the positioning post and the carrier, the position of the positioning post in the sliding hole changes.

[0018] In some embodiments, the injection mold further includes a first driving block and a second driving block, wherein the first driving block is connected to the first injection module and is adapted to drive the first injection module to move; and the second driving block is connected to the second injection module and is adapted to drive the second injection module to move.

[0019] The plastic coating device further includes a top pressure block, which is detachably mounted on the top of the carrier and can cover the top opening of the limiting groove when placed on the top surface of the carrier.

[0020] In some embodiments, the first driving block has a first fixing platform on the side near the first injection molding module, one end of the first driving block is placed on the first fixing platform, the top of the first fixing platform has a first fixing groove, the bottom of the first injection molding module has a first fixing block, and the first fixing block is installed in the first fixing groove.

[0021] The second driving block has a second fixing platform on the side near the second injection module. One end of the second injection module is placed on the second fixing platform. The top of the second fixing platform has a second fixing groove. The bottom of the second injection module has a second fixing block. The second fixing block is installed in the second fixing groove.

[0022] In some embodiments, the limiting groove has a main limiting groove arranged along a first direction and a secondary limiting groove arranged along a second direction, the first direction and the second direction being intersected.

[0023] The workpiece includes a main workpiece extending along the first direction and a secondary workpiece disposed along the second direction; the main workpiece is installed in the main limiting groove, and the secondary workpiece is installed in the secondary limiting groove.

[0024] In some embodiments, the main limiting groove includes a first main limiting groove and a second main limiting groove, the center lines of the first main limiting groove and the second main limiting groove are located on different straight lines; the secondary limiting groove has a first secondary limiting groove and a second secondary limiting groove, the first secondary limiting groove extends outward from one side of the first main limiting groove, and the first secondary limiting groove communicates with the first main limiting groove;

[0025] The main workpiece includes a first main workpiece and a second main workpiece, the center lines of the first main workpiece and the second main workpiece are located on different straight lines, the first main workpiece is installed in the first main limiting groove, and the second main workpiece is installed in the second main limiting groove;

[0026] The auxiliary workpiece has a first auxiliary workpiece and a second auxiliary workpiece. The first auxiliary workpiece extends outward from the first main workpiece and is installed in the first auxiliary limiting groove. One end of the second auxiliary workpiece is connected to the first main workpiece and the second main workpiece, and the second auxiliary workpiece is installed in the second auxiliary limiting groove.

[0027] In some embodiments, the limiting groove further includes a movable groove located on one side of the first sub-limiting groove and the second sub-limiting groove, and the movable groove communicates with the first sub-limiting groove and the second sub-limiting groove.

[0028] In some embodiments, there are two limiting grooves, and the two limiting grooves are symmetrically arranged with respect to an axis between the two limiting grooves; there are also two workpieces, and the two workpieces are respectively installed in the two limiting grooves.

[0029] Beneficial effects:

[0030] 1. In the coating device provided in this application, the carrier of the coating device can accommodate the fixed end of the workpiece and can effectively fix the workpiece, thereby improving the accuracy of the injection structure forming at the injection end of the workpiece during injection molding and improving the pass rate of the formed coating product.

[0031] 2. In the plastic coating device provided in this application, after the injection molding structure that coats the injection end of the workpiece is formed by injection molding, the first lifting mechanism and the second lifting mechanism can push the carrier carrying the workpiece and the injection molding structure away from the injection molding structure, thereby realizing automatic separation from the injection mold. Attached Figure Description

[0032] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0033] Figure 1 This is a three-dimensional structural schematic diagram of the plastic coating device according to a preferred embodiment of the present invention;

[0034] Figure 2 This is a side view of the plastic coating device according to a preferred embodiment of the present invention;

[0035] Figure 3 This is a side view of the plastic coating device according to a preferred embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the injection molding structure of the coating device in the mold-opening state according to a preferred embodiment of the present invention;

[0037] Figure 5 This is an exploded structural diagram of the coating device according to a preferred embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of the workpiece mounted on the carrier according to a preferred embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of the injection-molded structure connected to the carrier according to a preferred embodiment of the present invention;

[0040] Figure 8 This is a three-dimensional structural diagram of the injection molding structure of the preferred embodiment of the present invention, showing the first and second lifting mechanisms in the lifting state.

[0041] Figure 9 This is a side view of the injection molding structure of the preferred embodiment of the present invention, showing the first and second lifting mechanisms in the lifting state. Detailed Implementation

[0042] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0043] To keep the drawings concise, each figure only schematically shows the parts relevant to the utility model, and these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0044] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0045] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] refer to Figures 1 to 9 This application provides a coating device 100, which is adapted to injection mold a structure 300 at a preset position on a workpiece 200. The coating device 100 includes a support platform 10, an injection mold 20, and a carrier 30. The injection mold 20 is mounted on the support platform 10 and has an mounting groove 21 and an injection groove 22. The carrier 30 is adapted to be mounted in the mounting groove 21, and its top has a limiting groove 31. The workpiece 200 has a fixed end 201 and an injection end 202. The shape of the fixed end 201 is adapted to the shape of the limiting groove 31. When the fixed end 201 is mounted in the limiting groove 31, the injection end 202 extends into the injection groove 22.

[0048] Preferably, the material of the workpiece 200 includes metal. The workpiece 200 is preferably a metal part. The material of the injection-molded structure 300 includes plastic. After using the coating device 100 provided in this application to coat the workpiece 200, the injection-molded structure 300 can be wrapped around the injection end 202 of the workpiece 200, so that the injection-molded structure 300 and the workpiece 200 form a coated product.

[0049] The carrier 30 of the plastic coating device 100 provided in this application can accommodate the fixed end 201 of the workpiece 200 and can effectively fix the workpiece 200, thereby improving the accuracy of the injection structure 300 being formed on the injection end 202 of the workpiece 200 during injection molding and improving the pass rate of the formed plastic-coated product.

[0050] Specifically, the top surface of the carrier 30 has a top opening communicating with the limiting groove 31, and the side of the carrier 30 near the injection end 202 has a side opening communicating with the limiting groove 31. The fixed end 201 of the workpiece 200 is adapted to pass through the top opening from top to bottom along a direction perpendicular to the top surface of the carrier 30 and be placed into the limiting groove 31. When the fixed end 201 is placed in the limiting groove 31, the injection end 202 extends through the side opening into the injection groove 22. When the fixed end 201 of the workpiece 200 is installed in the limiting groove 31, the workpiece 200 can be limited in the horizontal direction by the mutual cooperation between the fixed end 201 and the inner wall of the limiting groove 31, so as to ensure the length and position of the injection end 202 extending out of the carrier 30. After the injection structure 300 is formed at the injection end 202, the fixed end 201 of the workpiece 200 is moved upward relative to the carrier 30, so that the fixed end 201 of the workpiece 200 leaves the limiting groove 31.

[0051] In some modified embodiments, the coating device 100 further includes a top pressure block detachably mounted on the top of the carrier 30, which, when placed on the top surface of the carrier 30, can cover the top opening of the limiting groove 31. For example, before placing the fixed end 201 of the workpiece 200 into the limiting groove 31 of the carrier 30, the top pressure block is removed from the top surface of the carrier 30 to expose the top opening of the limiting groove 31. After placing the fixed end 201 of the workpiece 200 into the limiting groove 31, the top pressure block is placed on the top surface of the carrier 30 to cover the top opening of the limiting groove 31, thereby limiting the workpiece 200 in a direction perpendicular to the top surface of the carrier 30.

[0052] Preferably, the top pressure block is detachably connected to the carrier 30 via magnetic attraction. Specifically, a first magnetic element is provided at a predetermined position on the top surface of the carrier 30, and a second magnetic element is provided at the bottom of the top pressure block. When the top pressure block is installed on the top surface of the carrier 30, the first magnetic element and the second magnetic element attract each other, thereby fixing the top pressure block to the top surface of the carrier 30. When it is necessary to separate the top pressure block from the carrier 30, the top pressure block is pulled upward relative to the carrier 30 to overcome the attraction force between the first magnetic element and the second magnetic element, thereby separating the top pressure block from the carrier 30. In some modified embodiments, the top surface of the carrier 30 has a plurality of slots, and the bottom surface of the top pressure block has a plurality of posts. When the top pressure block is placed on the top surface of the carrier 30, the plurality of posts are inserted into the plurality of slots, so that the top pressure block is installed on the top surface of the carrier 30 by means of the interference fit between the posts and the slots.

[0053] refer to Figure 1 , Figure 5 as well as Figure 7 The plastic coating device 100 further includes a plurality of positioning posts 211 disposed on the bottom surface of the mounting groove 21, and the bottom of the carrier 30 has a plurality of positioning grooves 32. When the carrier 30 is installed in the mounting groove 21, the plurality of positioning posts 211 are installed in the plurality of positioning grooves 32. The carrier 30 is limited in the horizontal direction by the mutual cooperation between the positioning posts 211 and the positioning grooves 32.

[0054] Furthermore, a plurality of positioning posts 211 penetrate the injection mold 20 and are movable up and down relative to the injection mold 20 along the height direction of the injection mold 20, forming a first lifting mechanism 11. The plastic coating device 100 further includes a second lifting mechanism 12 disposed on the top of the support platform 10, the position of the second lifting mechanism 12 corresponding to the position of the injection groove 22. After injection molding is completed, when the first lifting mechanism 11 and the second lifting mechanism 12 move, they can drive the carrier 30, the workpiece 200, and the injection structure 300 to separate from the injection mold 20.

[0055] refer to Figure 8 and Figure 9Specifically, the first lifting mechanism 11 is located below the carrier 30, and the second lifting mechanism 12 is located below the injection molding structure 300. When the first lifting mechanism 11 moves upward, it can push the carrier 30 away from the injection mold; when the second lifting mechanism 12 moves upward, it can push the injection molding structure 300 away from the injection mold. After injection molding is completed, the first lifting mechanism 11 and the second lifting mechanism 12 are controlled to rise synchronously, so as to simultaneously push the carrier 30 and the injection molding structure 300 away from the injection mold 20.

[0056] refer to Figures 1 to 5 Furthermore, the injection mold 20 includes a first injection module 23 and a second injection module 24. The first injection module 23 and the second injection module 24 are slidably mounted on the top of the support platform 10. The injection groove 22 is formed between the first injection module 23 and the second injection module 24; in the mold-closed state, the first injection module 23 and the second injection module 24 are close to each other; in the mold-open state, the first injection module 23 and the second injection module 24 are far apart from each other.

[0057] The mounting groove 21 is formed on the top of the first injection molding module 23; the first injection molding module 23 has a plurality of sliding holes 230 corresponding to the position of the positioning post 211, and the plurality of positioning posts 211 extend through the sliding holes 230 toward the carrier 30; when the first injection molding module 23 slides relative to the support platform 10, the positioning post 211 and the carrier 30, the position of the positioning post 211 in the sliding hole 230 changes.

[0058] Specifically, when mold opening is required, the first injection molding module 23 and the second injection molding module 24 are controlled to move in opposite directions relative to the support platform 10, so that the first injection molding module 23 and the second injection molding module 24 separate. When the first injection molding module 23 moves relative to the support platform 10, the positions of the positioning post 211 and the carrier 30 relative to the support platform 10 remain unchanged, so that the carrier 30 slides within the mounting groove 21.

[0059] refer to Figures 1 to 5 The injection mold 20 further includes a first driving block 25 and a second driving block 26. The first driving block 25 is connected to the first injection module 23 and is adapted to drive the first injection module 23 to move. The second driving block 26 is connected to the second injection module 24 and is adapted to drive the second injection module 24 to move.

[0060] Specifically, the first driving block 25 has a first fixing platform 251 on the side near the first injection molding module 23. One end of the first driving block 25 is placed on the first fixing platform 251. The top of the first fixing platform 251 has a first fixing groove 250. The bottom of the first injection molding module 23 has a first fixing block 231, which is installed in the first fixing groove 250. The second driving block 26 has a second fixing platform 261 on the side near the second injection molding module 24. One end of the second injection molding module 24 is placed on the second fixing platform 261. The top of the second fixing platform 261 has a second fixing groove 260. The bottom of the second injection molding module 24 has a second fixing block 241, which is installed in the second fixing groove 260. Through the cooperation between the first fixing block 231 and the first fixing groove 250, the first driving block 25 can drive the first injection molding module 23 to move when it moves. Through the cooperation between the second fixing block 241 and the second fixing groove 260, the second driving block 26 can drive the second injection molding module 24 to move when it moves. In some embodiments, the overlapping positions of the first injection molding module 23 and the first fixing platform 251 are fastened together by screws, and the overlapping positions of the second injection molding module 24 and the second fixing platform 261 are fastened together by screws.

[0061] refer to Figure 6 The limiting groove 31 has a main limiting groove 311 arranged along a first direction and a secondary limiting groove 312 arranged along a second direction, the first direction and the second direction being intersected. The workpiece 200 includes a main workpiece 203 extending along the first direction and a secondary workpiece 204 arranged along the second direction; the main workpiece 203 is installed in the main limiting groove 311, and the secondary workpiece 204 is installed in the secondary limiting groove 312. Since the main limiting groove 311 and the secondary limiting groove 312 are intersected, that is, there is a certain angle between the extension direction of the main limiting groove 311 and the extension direction of the secondary limiting groove 312, when the main workpiece 203 is installed in the main limiting groove 311 and the secondary workpiece 204 is installed in the secondary limiting groove 312, the cooperation between the secondary workpiece 204 and the secondary limiting groove 312 can limit the workpiece 200 along the length direction of the main limiting groove 311.

[0062] refer to Figure 6Furthermore, the main limiting groove 311 includes a first main limiting groove 3111 and a second main limiting groove 3112, with the center lines of the first main limiting groove 3111 and the second main limiting groove 3112 located on different straight lines. The secondary limiting groove 312 has a first secondary limiting groove 3121 and a second secondary limiting groove 3122. The first secondary limiting groove 3121 extends outward from one side of the first main limiting groove 3111 and communicates with the first main limiting groove 3111. The second secondary limiting groove 3122 communicates with the first main limiting groove 3111 and the second main limiting groove 3112.

[0063] The main workpiece includes a first main workpiece 2031 and a second main workpiece 2032, whose centerlines are located on different straight lines. The first main workpiece 2031 is installed in the first main limiting groove 3111, and the second main workpiece 2032 is installed in the second main limiting groove 3112. The auxiliary workpiece 204 has a first auxiliary workpiece 2041 and a second auxiliary workpiece 2042. The first auxiliary workpiece 2041 extends outward from the first main workpiece 2031 and is installed in the first auxiliary limiting groove 3121. One end of the second auxiliary workpiece 2042 is connected to the first main workpiece 2031 and the second main workpiece 2032, and the second auxiliary workpiece 2042 is installed in the second auxiliary limiting groove 3122.

[0064] Furthermore, the limiting groove 31 further includes a movable groove 313 located on one side of the first secondary limiting groove 3121 and the second secondary limiting groove 3122, and the movable groove 313 communicates with the first secondary limiting groove 3121 and the second secondary limiting groove 3122. The movable groove 313 facilitates the operator in removing the workpiece 200 from the limiting groove 31 of the carrier 30.

[0065] Preferably, there are two limiting grooves 31, and the two limiting grooves 31 are symmetrically arranged with respect to an axis between them; there are also two workpieces 200, and the two workpieces 200 are respectively installed in the two limiting grooves 31. When the two workpieces 200 are installed in the two limiting grooves 31, the injection ends 202 of both workpieces 200 extend into the injection groove 22. When the injection structure 300 is formed by casting in the injection groove 22, the injection structure 300 can encapsulate the injection ends 202 of the two workpieces 200.

[0066] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A plastic coating device, suitable for injection molding to form an injection-molded structure at a predetermined position on a workpiece, characterized in that, include: Support platform; The injection mold is mounted on the support platform and has an installation groove and an injection groove. A carrier adapted to be installed in the mounting slot, the top of the carrier having a limiting slot; The workpiece has a fixed end and an injection end. The shape of the fixed end is adapted to the shape of the limiting groove. When the fixed end is installed in the limiting groove, the injection end extends into the injection groove.

2. The coating device according to claim 1, characterized in that, The plastic coating device further includes a plurality of positioning posts disposed on the bottom surface of the mounting groove, and the bottom of the carrier has a plurality of positioning grooves. When the carrier is installed in the mounting groove, the plurality of positioning posts are installed in the plurality of positioning grooves.

3. The coating device according to claim 2, characterized in that, A plurality of the positioning posts penetrate the injection mold and are able to move up and down relative to the injection mold along the height direction of the injection mold, and the plurality of positioning posts form a first lifting mechanism; The plastic coating device further includes a second lifting mechanism disposed on the top of the support platform, the position of the second lifting mechanism corresponding to the position of the injection molding groove; After injection molding is completed, the first lifting mechanism and the second lifting mechanism can drive the carrier, the workpiece, and the injection structure to separate from the injection mold when they move.

4. The coating device according to claim 3, characterized in that, The injection mold includes a first injection module and a second injection module, which are slidably mounted on the top of the support platform. The injection groove is formed between the first injection module and the second injection module; in the mold closed state, the first injection module and the second injection module are close to each other, and in the mold open state, the first injection module and the second injection module are far apart from each other; The mounting groove is formed on the top of the first injection molding module; the first injection molding module has a plurality of sliding holes corresponding to the position of the positioning post, and the plurality of positioning posts extend through the sliding holes toward the carrier; when the first injection molding module slides relative to the support platform, the positioning post and the carrier, the position of the positioning post in the sliding hole changes.

5. The coating device according to claim 4, characterized in that, The injection mold further includes a first driving block and a second driving block, wherein the first driving block is connected to the first injection module and is adapted to drive the first injection module to move; and the second driving block is connected to the second injection module and is adapted to drive the second injection module to move. The plastic coating device further includes a top pressure block, which is detachably mounted on the top of the carrier and can cover the top opening of the limiting groove when placed on the top surface of the carrier.

6. The coating device according to claim 5, characterized in that, The first driving block has a first fixing platform on the side near the first injection molding module. One end of the first driving block is placed on the first fixing platform. The top of the first fixing platform has a first fixing groove. The bottom of the first injection molding module has a first fixing block. The first fixing block is installed in the first fixing groove. The second driving block has a second fixing platform on the side near the second injection module. One end of the second injection module is placed on the second fixing platform. The top of the second fixing platform has a second fixing groove. The bottom of the second injection module has a second fixing block. The second fixing block is installed in the second fixing groove.

7. The coating device according to claim 1, characterized in that, The limiting groove has a main limiting groove arranged along a first direction and a secondary limiting groove arranged along a second direction, the first direction and the second direction being intersected by each other; The workpiece includes a main workpiece extending along the first direction and a secondary workpiece disposed along the second direction; The main workpiece is installed in the main limiting groove, and the auxiliary workpiece is installed in the auxiliary limiting groove.

8. The coating device according to claim 7, characterized in that, The main limiting groove includes a first main limiting groove and a second main limiting groove, the center lines of the first main limiting groove and the second main limiting groove are located on different straight lines; the secondary limiting groove has a first secondary limiting groove and a second secondary limiting groove, the first secondary limiting groove extends outward from one side of the first main limiting groove, and the first secondary limiting groove is connected to the first main limiting groove; The main workpiece includes a first main workpiece and a second main workpiece, the center lines of the first main workpiece and the second main workpiece are located on different straight lines, the first main workpiece is installed in the first main limiting groove, and the second main workpiece is installed in the second main limiting groove; The auxiliary workpiece has a first auxiliary workpiece and a second auxiliary workpiece, the first auxiliary workpiece extends outward from the first main workpiece, and the first auxiliary workpiece is installed in the first auxiliary limiting groove; One end of the second auxiliary workpiece is connected to the first main workpiece and the second main workpiece, and the second auxiliary workpiece is installed in the second auxiliary limiting groove.

9. The coating device according to claim 8, characterized in that, The limiting groove further includes a movable groove located on one side of the first sub-limiting groove and the second sub-limiting groove, and the movable groove is in communication with the first sub-limiting groove and the second sub-limiting groove.

10. The coating device according to claim 9, characterized in that, The number of the limiting grooves is two, and the two limiting grooves are symmetrically arranged with respect to an axis between the two limiting grooves; the number of the workpieces is also two, and the two workpieces are respectively installed in the two limiting grooves.

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