Injection molding shell polishing device and polishing method

Abstract

The present invention discloses an injection molded shell polishing device and a polishing method. The present invention relates to the field of injection molding technology, comprising a panel, wherein support legs are fixedly connected to the corners of the lower surface of the panel; a wrapping device, by setting the wrapping device, the injection molded shell to be polished can be wrapped, and the rotating device can be driven to move toward the outer surface of the injection molded shell, thereby preventing the injection molded shell from being offset during polishing. The wrapping device comprises a first support rod, which is fixedly connected to the upper surface of the panel, and the top of the first support rod is fixedly connected to a limiting ring, and the setting of the limiting ring can limit the sliding rod; a sliding rod is slidably connected to the inner cavity of the limiting ring, and the end of the sliding rod is fixedly connected to a wrapping plate, and the end of the wrapping plate is fixedly connected to a first fixed block, so as to achieve the effect of clamping the injection molded shell and polishing its outer surface.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and in particular to an injection molding shell polishing device and a polishing method. Background Art

[0002] Injection molding is a method of producing industrial products. Products usually use rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding compression molding and die casting. Injection molding machine (referred to as injection machine or injection molding machine) is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting materials. Injection molding is achieved through injection molding machines and molds. Plastic injection molding: Plastic injection molding is a method of plastic products. The molten plastic is injected into the plastic product mold under pressure, and the desired plastic parts are obtained by cooling and molding. There are mechanical injection molding machines specifically for injection molding. The most commonly used plastics at present are polyethylene, polypropylene, ABS, PA, polystyrene, etc.;

[0003] During the production of injection molded shells, a lot of plastic debris will remain on the outer surface of the injection molded shells, and the outer surface needs to be polished; and when polishing the injection molded shells on the market, most operators use files to polish them, and the work efficiency is not high. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: an injection molded shell polishing device and polishing method, comprising a panel, wherein the corners of the lower surface of the panel are fixedly connected with support legs;

[0005] The wrapping device can wrap the injection molded shell to be polished, and can drive the rotating device to move toward the outer surface of the injection molded shell, thereby preventing the injection molded shell from deviating during polishing. The wrapping device includes a first support rod, which is fixedly connected to the upper surface of the panel, and the top of the first support rod is fixedly connected to a limiting ring. The setting of the limiting ring can limit the sliding rod;

[0006] A sliding rod is slidably connected to the inner cavity of the limiting ring, a wrapping plate is fixedly connected to the end of the sliding rod, a first fixed block is fixedly connected to the end of the wrapping plate, and a limiting hole is provided on the outer surface of the first fixed block. The setting of the limiting hole can cooperate with the limiting rod to wrap the injection molded shell.

[0007] Preferably, a rotating device is provided at the inner wall of the wrapping plate. By providing the rotating device, the injection molded shell between the wrapping plate and the support plate can be clamped, and injection molded shells of different shapes can be adapted. The number of the rotating devices is two, and the two rotating devices are both provided at the inner wall of the wrapping plate. The rotating device includes a fixed frame, which is fixedly connected to the inner wall of the wrapping plate, and the fixed frame passes through the wrapping plate.

[0008] Preferably, a limiting frame is fixedly connected to the inner cavity of the fixed frame, a rotating rod is rotatably connected to the inner cavity of the limiting frame, a sliding ring is fixedly connected to the outer surface of the rotating rod, the sliding ring is slidably connected to the inner cavity of the limiting frame, a rotating plate is fixedly connected to the end of the rotating rod, a first soft pad is fixedly connected to the outer surface of the rotating plate, and the setting of the limiting frame can enable the rotating rod and the sliding ring to produce a rotation effect in its inner cavity.

[0009] Preferably, the outer surface of the fixed frame is fixedly connected to a second fixed block, the end of the second fixed block is fixedly connected to a limiting track ring, the outer surface of the limiting track ring is slidably connected to a limiting sleeve, and the setting of the limiting sleeve can cooperate with the limiting track ring when the rotating plate rotates, thereby producing a stable rotation effect, thereby changing the position of the injection molded shell facing the grinding disk, and the outer surface of the limiting sleeve is fixedly connected to a second support rod on the side close to the rotating plate, and the end of the second support rod away from the limiting sleeve is fixedly connected to the outer surface of the rotating plate.

[0010] Preferably, a soft ring is fixedly connected to the side of the outer surface of the rotating plate away from the sliding rotating rod, a spring sheet is fixedly connected to the inner wall of the soft ring, and a suction cup is fixedly connected to the end of the spring sheet. The arrangement of the spring sheet and the suction cup can clamp the outer surface of the special-shaped injection molded shell.

[0011] Preferably, a placement and polishing device is fixedly connected to the upper surface of the panel. By setting up the placement and polishing device, the injection molded shell that needs to be polished can be placed and polished. The placement and polishing device includes a support plate, and the support plate is fixedly connected to the side of the upper surface of the panel away from the wrapping device.

[0012] Preferably, a third fixed block is fixedly connected to one side of the outer surface of the support plate close to the first fixed block, and a limiting rod is fixedly connected to the outer surface of the third fixed block. The limiting rod is frictionally fitted with a limiting hole provided on the outer surface of the third fixed block. The setting of the limiting rod can connect the wrapping device to the support plate.

[0013] Preferably, a fixing plate is fixedly connected to one side of the outer surface of the support plate close to the wrapping plate, a placement plate is fixedly connected to the bottom edge of the outer surface of the fixing plate, a partition rod is fixedly connected between opposite surfaces of the placement plate, a second soft pad is fixedly connected to the upper surface of the placement plate, and a discharge port is provided on the upper surface of the panel directly below the placement plate. The partition rod and the discharge port can discharge debris generated by grinding through the partition rod and the discharge port.

[0014] Preferably, one end of the outer surface of the support plate away from the fixed plate is fixedly connected to a third support rod, the end of the third support rod is fixedly connected to a fourth fixed block, the upper surface of the fourth fixed block is fixedly connected to a servo motor, the output end of the servo motor is fixedly connected to a rotating column, the end of the rotating column is fixedly connected to a grinding disk, and the setting of the servo motor can make the rotating column rotate, thereby making the grinding disk grind the surface of the injection molded shell.

[0015] A method for polishing an injection molded housing comprises the following steps:

[0016] Step 1: When polishing the injection molded shell, the operator first manually removes the large plastic blocks on the outer surface of the injection molded shell. After removing them, the operator pulls the sliding rod to move the sliding rod in the inner cavity of the limiting ring. When the gap between the wrapping plate and the support plate is large enough, the operator stops pulling the sliding rod.

[0017] Step 2: Place the injection molding material with the surface plastic sheet preliminarily removed on the upper surface of the partition rod between the placement plates, and place the position to be polished directly below the polishing disc. After placement, align the limiting hole opened on the outer surface of the first fixing block with the limiting rod, and sleeve the first fixing block in the limiting rod;

[0018] Step 3: After placement, the operator pushes the sliding rod and moves the rotating device toward the outer surface of the injection-molded shell. During the movement, the suction cup will be in close contact with the outer surface of the injection-molded shell. During the contact process, the spring sheet will deform, so that the suction cup can contact with injection-molded shells of different shapes.

[0019] Step 4: After the injection molded shell is clamped, the operator connects the servo motor to the power supply and turns on the servo motor. The servo motor starts to work, so that the rotating column starts to rotate. During the rotation, the grinding disc contacts the position on the upper surface of the injection molded shell that needs to be polished, thereby polishing the injection molded shell;

[0020] Step 5: After polishing, the operator turns off the switch of the servo motor and pulls the sliding rod so that the rotating device and the wrapping device no longer squeeze the outer surface of the injection molded shell. At this time, the polished injection molded shell can be removed.

[0021] The present invention provides an injection molded shell polishing device and a polishing method, which have the following beneficial effects:

[0022] 1. The injection molded shell polishing device and polishing method can wrap the injection molded shell that needs to be polished by setting a wrapping device, and can drive the rotating device to move toward the outer surface of the injection molded shell, thereby preventing the injection molded shell from being offset during polishing. The setting of the limiting ring can limit the sliding rod.

[0023] 2. The injection molded shell polishing device and polishing method can clamp the injection molded shell between the wrapping plate and the support plate by setting a rotating device, and can adapt to injection molded shells of different shapes, and can make the injection molded shell rotate to complete all-round polishing. The setting of the limit frame can make the rotating rod and the sliding ring produce a rotation effect in their inner cavity.

[0024] 3. The injection molded shell polishing device and polishing method can place and polish the injection molded shell that needs to be polished by setting a placement polishing device. The setting of the limit rod can connect the wrapping device with the support plate.

[0025] Fourth, the injection molded shell grinding device and grinding method, through the setting of the limit sleeve, can cooperate with the limit track ring when the rotating plate rotates, thereby producing a stable rotation effect, and then changing the position of the injection molded shell facing the grinding disk. The setting of the spring piece and the suction cup can clamp the outer surface of the special-shaped injection molded shell.

[0026] 5. The injection molded shell grinding device and grinding method can connect the wrapping device with the support plate through the setting of the limit rod, and the setting of the partition rod and the discharge port can discharge the debris generated by grinding out of the device through the partition rod and the discharge port. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the external structure of an injection molding shell polishing device of the present invention;

[0028] Figure 2 This is a schematic diagram of the disassembled structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the wrapping device of the present invention;

[0030] Figure 4 It is a schematic diagram of the partial structure of the wrapping device of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the rotating device of the present invention;

[0032] Figure 6 It is a schematic diagram of the local structure of the rotating device of the present invention;

[0033] Figure 7 It is a schematic diagram of the local structure of the rotating device of the present invention;

[0034] Figure 8 This is a schematic diagram of the structure of the grinding device of the present invention;

[0035] Fig. 9 It is a schematic diagram of the local structure of the grinding device of the present invention;

[0036] Fig.10 The present invention is a schematic structural diagram of a method for polishing an injection molded housing.

[0037] In the figure: 1. panel; 2. supporting leg; 3. wrapping device; 4. rotating device; 5. placing and grinding device; 6. discharge port; 31. first supporting rod; 32. limiting ring; 33. sliding rod; 34. wrapping plate; 35. first fixed block; 36. limiting hole; 41. fixed frame; 42. limiting frame; 43. second fixed block; 44. limiting track ring; 45. rotating rod; 46. sliding ring; 47. rotating plate; 48. second supporting rod; 49. limiting sleeve; 410. first soft pad; 411. soft ring; 412. spring; 413. suction cup; 51. supporting plate; 52. third fixed block; 53. limiting rod; 54. fixed plate; 55. placing plate; 56. spacer; 57. second soft pad; 58. third supporting rod; 59. fourth fixed block; 510. servo motor; 511. rotating column; 512. grinding disc. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0039] The first embodiment, as Figure 1-Figure 4 As shown, the present invention provides a technical solution: an injection molded shell polishing device and a polishing method, comprising a panel 1, and a support leg 2 is fixedly connected to the corner of the lower surface of the panel 1;

[0040] The wrapping device 3 can wrap the injection molded shell to be polished, and can drive the rotating device 4 to move toward the outer surface of the injection molded shell, thereby preventing the injection molded shell from deviating during polishing. The wrapping device 3 includes a first support rod 31, which is fixedly connected to the upper surface of the panel 1, and the top of the first support rod 31 is fixedly connected to a limiting ring 32. The setting of the limiting ring 32 can limit the sliding rod 33.

[0041] A sliding rod 33 is slidably connected to the inner cavity of the limiting ring 32, and a wrapping plate 34 is fixedly connected to the end of the sliding rod 33. A first fixed block 35 is fixedly connected to the end of the wrapping plate 34. A limiting hole 36 is provided on the outer surface of the first fixed block 35. The setting of the limiting hole 36 can cooperate with the limiting rod 53 to wrap the injection molded shell. When in use, the operator pulls the sliding rod 33 to move the sliding rod 33 in the inner cavity of the limiting ring 32. When the gap between the wrapping plate 34 and the support plate 51 is large enough, stop pulling the sliding rod 33.

[0042] The second embodiment, as Figure 5-Figure 7As shown, a rotating device 4 is provided at the inner wall of the wrapping plate 34. By providing the rotating device 4, the injection molded shell between the wrapping plate 34 and the support plate 51 can be clamped, and injection molded shells of different shapes can be adapted. The number of the rotating devices 4 is two, and the two rotating devices 4 are both provided at the inner wall of the wrapping plate 34. The rotating device 4 includes a fixed frame 41, and the fixed frame 41 is fixedly connected to the inner wall of the wrapping plate 34. The fixed frame 41 passes through the wrapping plate 34. The inner cavity of the fixed frame 41 is fixedly connected to a limiting frame 42, and the inner cavity of the limiting frame 42 is rotatably connected to A rotating rod 45, the outer surface of which is fixedly connected to a sliding ring 46, the sliding ring 46 is slidably connected to the inner cavity of the limit frame 42, the end of the rotating rod 45 is fixedly connected to a rotating plate 47, the outer surface of the rotating plate 47 is fixedly connected to a first cushion 410, the setting of the limit frame 42 can enable the rotating rod 45 and the sliding ring 46 to produce a rotating effect in its inner cavity, the outer surface of the fixed frame 41 is fixedly connected to a second fixed block 43, the end of the second fixed block 43 is fixedly connected to a limited track ring 44, the outer surface of the limited track ring 44 is slidably connected to a limited sleeve 49 The setting of the limiting sleeve 49 can cooperate with the limiting track ring 44 when the rotating plate 47 rotates, thereby producing a stable rotation effect, thereby changing the position of the injection molded shell facing the grinding disk 512. The side of the outer surface of the limiting sleeve 49 close to the rotating plate 47 is fixedly connected to the second support rod 48, and the end of the second support rod 48 away from the limiting sleeve 49 is fixedly connected to the outer surface of the rotating plate 47. The side of the outer surface of the rotating plate 47 away from the sliding rotating rod 45 is fixedly connected to a soft ring 411, and the inner wall of the soft ring 411 is fixedly connected to a spring piece 412, and the end of the spring piece 412 A suction cup 413 is fixedly connected. The arrangement of the spring piece 412 and the suction cup 413 can clamp the outer surface of an irregularly shaped injection molded shell. When in use, the sliding rod 33 is pushed and the rotating device 4 is moved toward the outer surface of the injection molded shell. During the movement, the suction cup 413 will be in tight contact with the outer surface of the injection molded shell. During the contact process, the spring piece 412 is deformed so that the suction cup 413 can contact with injection molded shells of different shapes. When the grinding position needs to be changed, the wrapping plate 34 is loosened a little, and then the rotating rod 45 is rotated to complete the adjustment of the grinding position, and then it can be clamped again.

[0043] The third embodiment, as Figure 8-Figure 10As shown, the upper surface of the panel 1 is fixedly connected with a placement and polishing device 5. By setting the placement and polishing device 5, the injection molded shell that needs to be polished can be placed and polished. The placement and polishing device 5 includes a support plate 51, and the support plate 51 is fixedly connected to the side of the upper surface of the panel 1 away from the wrapping device 3. The outer surface of the support plate 51 is fixedly connected to a third fixed block 52 on the side close to the first fixed block 35. The outer surface of the third fixed block 52 is fixedly connected to a limiting rod 53. The limiting rod 53 and the limiting rod 53 are provided on the outer surface of the third fixed block 52. The holes 36 are frictionally matched, and the setting of the limit rod 53 can connect the wrapping device 3 with the support plate 51. The outer surface of the support plate 51 is fixedly connected to a fixing plate 54 on one side close to the wrapping plate 34. The bottom side of the outer surface of the fixing plate 54 is fixedly connected to a placement plate 55. A partition rod 56 is fixedly connected between the opposite surfaces of the placement plate 55. The upper surface of the placement plate 55 is fixedly connected to a second cushion 57. The upper surface of the panel 1 is provided with a discharge port 6 just below the placement plate 55. The setting of the partition rod 56 and the discharge port 6 can collect the debris generated by grinding. The chips are discharged from the device through the partition rod 56 and the discharge port 6. The end of the outer surface of the support plate 51 away from the fixed plate 54 is fixedly connected to a third support rod 58, and the end of the third support rod 58 is fixedly connected to a fourth fixed block 59. The upper surface of the fourth fixed block 59 is fixedly connected to a servo motor 510. The output end of the servo motor 510 is fixedly connected to a rotating column 511, and the end of the rotating column 511 is fixedly connected to a grinding disc 512. The setting of the servo motor 510 can make the rotating column 511 rotate, thereby causing the grinding disc 512 to grind the surface of the injection molding shell. During the grinding work, when in use, the position to be polished is placed directly below the grinding disc 512. After placement, the limiting hole 36 opened on the outer surface of the first fixed block 35 is aligned with the limiting rod 53, and the first fixed block 35 is sleeved in the limiting rod 53. After clamping the injection molded shell, the servo motor 510 is connected to the power supply and the switch of the servo motor 510 is turned on. The servo motor 510 starts to work, so that the rotating column 511 starts to rotate. During the rotation, the grinding disc 512 contacts the position on the upper surface of the injection molded shell that needs to be polished, thereby grinding the injection molded shell.

[0044] A method for polishing an injection molded housing comprises the following steps:

[0045] Step 1: When polishing the injection molded shell, the operator first manually removes the large plastic blocks on the outer surface of the injection molded shell. After removing the large plastic blocks, the operator pulls the sliding rod 33 to move the sliding rod 33 in the inner cavity of the limiting ring 32. When the gap between the wrapping plate 34 and the supporting plate 51 is large enough, the operator stops pulling the sliding rod 33.

[0046] Step 2: Place the injection molding material with the surface plastic sheet preliminarily removed on the upper surface of the partition rod 56 between the placement plates 55, and place the position to be polished directly below the polishing disc 512. After placement, align the limiting hole 36 opened on the outer surface of the first fixing block 35 with the limiting rod 53, and sleeve the first fixing block 35 in the limiting rod 53;

[0047] Step 3: After placement, the operator pushes the sliding rod 33 and moves the rotating device 4 toward the outer surface of the injection-molded shell. During the movement, the suction cup 413 will be in close contact with the outer surface of the injection-molded shell. During the contact, the spring piece 412 will be deformed, so that the suction cup 413 can contact with injection-molded shells of different shapes.

[0048] Step 4: After the injection molded shell is clamped, the operator connects the servo motor 510 to the power supply and turns on the switch of the servo motor 510, and the servo motor 510 starts to work, thereby causing the rotating column 511 to start rotating. During the rotation, the grinding disc 512 contacts the position on the upper surface of the injection molded shell that needs to be polished, thereby polishing the injection molded shell;

[0049] Step 5: After polishing, the operator turns off the switch of the servo motor 510 and pulls the sliding rod 33, so that the rotating device 4 and the wrapping device 3 no longer squeeze the outer surface of the injection-molded shell. At this time, the polished injection-molded shell can be removed.

[0050] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. An injection molded housing polishing device, comprising a panel (1), wherein support legs (2) are fixedly connected to the corners of the lower surface of the panel (1), and characterized in that: The injection molded housing polishing device also includes: A wrapping device (3), the wrapping device (3) comprising a first support rod (31), the first support rod (31) being fixedly connected to the upper surface of the panel (1), the top end of the first support rod (31) being fixedly connected to a limiting circular ring (32); A sliding rod (33) is slidably connected to the inner cavity of the limiting circular ring (32); a wrapping plate (34) is fixedly connected to the end of the sliding rod (33); a first fixing block (35) is fixedly connected to the end of the wrapping plate (34); and a limiting hole (36) is provided on the outer surface of the first fixing block (35); A rotating device (4) is arranged on the inner wall of the wrapping plate (34), and the number of the rotating devices (4) is two, and the two rotating devices (4) are both arranged on the inner wall of the wrapping plate (34), and the rotating device (4) comprises a fixing frame (41), and the fixing frame (41) is fixedly connected to the inner wall of the wrapping plate (34), and the fixing frame (41) passes through the wrapping plate (34); The inner cavity of the fixed frame (41) is fixedly connected to the limit frame (42), the inner cavity of the limit frame (42) is rotatably connected to a rotating rod (45), the outer surface of the rotating rod (45) is fixedly connected to a sliding ring (46), the sliding ring (46) is slidably connected to the inner cavity of the limit frame (42), the end of the rotating rod (45) is fixedly connected to a rotating plate (47), and the outer surface of the rotating plate (47) is fixedly connected to a first soft pad (410); The outer surface of the fixed frame (41) is fixedly connected to a second fixed block (43); the end of the second fixed block (43) is fixedly connected to a limit track ring (44); the outer surface of the limit track ring (44) is slidably connected to a limit sleeve (49); a second support rod (48) is fixedly connected to a side of the outer surface of the limit sleeve (49) close to the rotating plate (47); and one end of the second support rod (48) away from the limit sleeve (49) is fixedly connected to the outer surface of the rotating plate (47); A soft ring (411) is fixedly connected to the side of the outer surface of the rotating plate (47) away from the sliding rotating rod (45), a spring sheet (412) is fixedly connected to the inner wall of the soft ring (411), and a suction cup (413) is fixedly connected to the end of the spring sheet (412).

2. The injection molded housing polishing device according to claim 1, characterized in that: A placement and polishing device (5) is fixedly connected to the upper surface of the panel (1), wherein the placement and polishing device (5) comprises a support plate (51), and the support plate (51) is fixedly connected to a side of the upper surface of the panel (1) away from the wrapping device (3).

3. The injection molded housing polishing device according to claim 2, characterized in that: A third fixing block (52) is fixedly connected to a side of the outer surface of the support plate (51) close to the first fixing block (35), and a limiting rod (53) is fixedly connected to the outer surface of the third fixing block (52), wherein the limiting rod (53) is frictionally matched with a limiting hole (36) provided on the outer surface of the third fixing block (52).

4. The injection molded housing polishing device according to claim 3, characterized in that: A fixing plate (54) is fixedly connected to one side of the outer surface of the support plate (51) close to the wrapping plate (34); a placement plate (55) is fixedly connected to the bottom edge of the outer surface of the fixing plate (54); a partition rod (56) is fixedly connected between opposite surfaces of the placement plate (55); a second soft pad (57) is fixedly connected to the upper surface of the placement plate (55); and a discharge port (6) is provided on the upper surface of the panel (1) directly below the placement plate (55).

5. The injection molded housing polishing device according to claim 4, characterized in that: A third support rod (58) is fixedly connected to one end of the outer surface of the support plate (51) away from the fixed plate (54); a fourth fixed block (59) is fixedly connected to the end of the third support rod (58); a servo motor (510) is fixedly connected to the upper surface of the fourth fixed block (59); a rotating column (511) is fixedly connected to the output end of the servo motor (510); and a grinding disc (512) is fixedly connected to the end of the rotating column (511).

6. A method for polishing an injection molded housing of an injection molded housing polishing device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: When polishing the injection molded housing, the operator first manually removes the large plastic blocks on the outer surface of the injection molded housing. After removing the large plastic blocks, the operator pulls the sliding rod (33) to move the sliding rod (33) in the inner cavity of the limiting ring (32). When the gap between the wrapping plate (34) and the supporting plate (51) is large enough, the operator stops pulling the sliding rod (33); Step 2: Place the injection molding material from which the surface plastic sheet has been preliminarily removed on the upper surface of the partition rod (56) between the placement plates (55), and place the position to be polished directly below the polishing disc (512). After placement, align the limiting hole (36) opened on the outer surface of the first fixing block (35) with the limiting rod (53), and sleeve the first fixing block (35) into the limiting rod (53); Step 3: After placement, the operator pushes the sliding rod (33) and moves the rotating device (4) toward the outer surface of the injection-molded shell. During the movement, the suction cup (413) comes into tight contact with the outer surface of the injection-molded shell. During the contact, the spring sheet (412) is deformed, so that the suction cup (413) can come into contact with injection-molded shells of different shapes. Step 4: After the injection molded shell is clamped, the operator connects the servo motor (510) to a power source and turns on the switch of the servo motor (510), and the servo motor (510) starts to work, thereby causing the rotating column (511) to start rotating. During the rotation process, the grinding disc (512) contacts the position on the upper surface of the injection molded shell that needs to be polished, thereby performing a grinding operation on the injection molded shell; Step 5: After polishing, the operator turns off the switch of the servo motor (510) and pulls the sliding rod (33), so that the rotating device (4) and the wrapping device (3) no longer press the outer surface of the injection molded shell. At this time, the polished injection molded shell can be removed.

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