Trimming mechanism for plastic product production
By designing the transmission and adjustment structures, the problem of the plastic products not being able to fit with the grinding wheel during the clamping process was solved, enabling continuous grinding of the edges of the plastic products, improving trimming efficiency and avoiding product damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIACHU TECHNOLOGY (JIANGSU) CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-05-12
AI Technical Summary
Existing plastic product manufacturing trimming mechanisms cannot push the plastic product to maintain continuous contact with the grinding wheel during the clamping process, resulting in ineffective grinding.
The transmission structure inside the two sets of side plates drives the first and second rotating shafts to rotate in opposite directions. Combined with the plastic spring and top block of the adjustment structure, the plastic product is clamped and pushed forward, ensuring that the burr edge can gradually fit into the grinding wheel for grinding.
It enables continuous grinding of the edges of plastic products, improves trimming efficiency, and avoids damage to the products during clamping.
Smart Images
Figure CN224223491U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plastic product trimming, specifically a trimming mechanism for the production of plastic products. Background Technology
[0002] Plastic products typically require a trimming mechanism to deburr their edges. This trimming mechanism includes a support platform, positioning fixtures, trimming execution components, and motion and adjustment components to achieve the trimming process of the plastic products. However, in the existing technology, the plastic products cannot be further advanced to fit the grinding wheel for polishing during the clamping process.
[0003] In the prior art, such as a trimming mechanism for producing plastic products, with application number CN202420596347.6, the mechanism uses a telescopic and rotating edge-grinding method to ensure the grinding of irregular edges; and a circumferential rotation trimming method to ensure the comprehensiveness of the trimming of plastic products.
[0004] However, when in use, after clamping the plastic product, it cannot push the plastic product forward to keep the burr edge in contact with the grinding wheel, thus failing to achieve grinding. Utility Model Content
[0005] The purpose of this invention is to provide a trimming mechanism for the production of plastic products, so as to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: it includes two sets of side plates and a support plate for supporting plastic products. The two sets of side plates drive the first rotating shaft and the second rotating shaft to rotate in opposite directions through a transmission structure. A disc is fixed at one end of the first rotating shaft and the second rotating shaft. Multiple sets of adjustment structures are provided in the disc. The adjustment structures corresponding to the first rotating shaft and the second rotating shaft are staggered. The adjustment structures are used to push the plastic product and clamp the plastic product.
[0007] Preferably, the support plate has an "L" shaped structure and is fixed between two sets of side plates, which are symmetrically distributed about the center of the trimming mechanism.
[0008] Preferably, the transmission structure includes a first spur gear and a second spur gear, the outer surfaces of the first spur gear and the second spur gear meshing with each other, the first spur gear being sleeved on the outer ring of the first rotating shaft, the second spur gear being sleeved on the outer ring of the second rotating shaft, and adjusting grooves being provided inside both sets of side plates, with the transmission structure located inside the adjusting grooves.
[0009] Preferably, the outer ring of the first rotating shaft has a ratchet that rotates coaxially, and a pawl engages with the outside of the ratchet. The ratchet rotates counterclockwise, and both the ratchet and the pawl are located inside the adjustment groove. A set of ratchet and pawl is provided, and the ratchet and pawl are located inside the right side plate.
[0010] Preferably, both the first and second rotating shafts pass through the adjustment groove, with the first rotating shaft located directly below the second rotating shaft.
[0011] Preferably, the adjusting structure includes a plastic spring, a top block, and an arc slope. A limiting groove is formed inside the disk. The disk is symmetrically distributed along the center line of the top surface of the trimming mechanism. The adjusting structure and the limiting groove are distributed around the virtual central axis of the disk. The adjusting structure is located inside the limiting groove. The top end of the plastic spring is fixed to the top of the limiting groove, and the bottom end of the plastic spring is fixed to the top block. The plastic spring is arc-shaped. The bottom end of the top block is located on the outside of the disk. The arc slope is located on both sides of the top block and has a semi-circular arc structure.
[0012] Preferably, a connecting shaft is fixed between the discs at one end of the two sets of first rotating shafts, and the adjustment structure is located behind the support plate.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] The trimming mechanism for plastic product manufacturing proposed in this utility model places the plastic product on a support plate with its sides placed between two upper and lower discs. Based on the thickness of the plastic product's edge, the lower plastic spring sheet presses against the top block, causing the plastic product to adhere to the lower surface of the upper top block, achieving a clamping effect. Under the action of the first and second spur gears, the first rotating shaft rotates counterclockwise, driving the second rotating shaft to rotate in the opposite direction. The relative staggered arrangement of the top blocks causes the plastic spring sheet and top block on the discs to rotate accordingly, thereby advancing the plastic product and gradually bringing the burr-laden edge to the grinding wheel for polishing. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 The structure of this utility model Figure 1 Overall top view;
[0017] Figure 3 The structure of this utility model Figure 2 Sectional view along line AA;
[0018] Figure 4 The structure of this utility model Figure 2 Sectional view along the BB direction;
[0019] Figure 5 The structure of this utility model Figure 3 Enlarged view of point A in the middle;
[0020] Figure 6 The structure of this utility model Figure 4 Enlarged view at point B in the middle;
[0021] Figure 7This is a partial schematic diagram of the adjustment structure of this utility model;
[0022] Figure 8 This is a schematic diagram of the adjustment structure of this utility model being moved out.
[0023] In the diagram: 1. Side plate; 2. First rotating shaft; 3. Ratchet; 4. Pawl; 5. First spur gear; 6. Second spur gear; 7. Second rotating shaft; 8. Adjustment groove; 9. Disc; 10. Limiting groove; 11. Plastic spring; 12. Top block; 13. Curved slope; 14. Support plate; 15. Connecting shaft. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0025] Example 1
[0026] Please see Figures 1-3 The present invention provides a technical solution: a trimming mechanism for the production of plastic products, including two sets of side plates 1 and a support plate 14 for supporting plastic products. The support plate 14 has an "L" shaped structure and is fixed between the two sets of side plates 1. The two sets of side plates 1 are symmetrically distributed about the center of the trimming mechanism.
[0027] Specifically, refer to Figure 1 and Figure 2The trimming mechanism includes a support platform, a positioning fixture, a trimming execution component, and a motion and adjustment component. The support platform, composed of a support plate, holds the plastic product to be trimmed, ensuring its stability during the trimming process. The positioning fixture precisely limits and positions the plastic product; it consists of a disc 9 and an outer ring top block 12. The trimming execution component comprises a grinding wheel and a motor. The motor provides rotational power to the grinding wheel, ensuring the smoothness of the cutting or grinding process and removing burrs or excess material from the plastic product. The motion and adjustment component consists of a guide mechanism and an adjustment mechanism. The guide mechanism, composed of a sliding sleeve, works with a screw to achieve linear movement of the cutting tool. The trimming position is adjusted using a guiding device consisting of a screw, a threaded sleeve, and a servo motor. The servo motor drives the screw to rotate, controlling the trimming position. Threaded transmission enables precise tool feed. The device also includes a slide rail, a lead screw, and a slider. The operator places the molded plastic product on the support plate, where it is clamped by the top block 12 on the positioning fixture to ensure the product is fixed. The trimming mechanism is then activated, and the grinding wheel rotates under the drive of the motor, removing excess material from the product's edges. When position adjustment is needed, the screw on the movement and adjustment component is moved. The servo motor drives the screw to rotate, and the screw, in conjunction with the threaded sleeve, enables the linear movement of the tool, controlling the trimming position. This is existing technology.
[0028] Example 2
[0029] Please see Figures 4-8Based on Embodiment 1, in order to achieve the gradual contact of the burr edge of the plastic product with the grinding wheel for polishing, and to fix it according to the thickness of the edge of the plastic product, a transmission structure is proposed to drive the first rotating shaft 2 and the second rotating shaft 7 to rotate in opposite directions through the internal transmission structure of the two sets of side plates 1. The transmission structure includes a first spur gear 5 and a second spur gear 6, with the outer surfaces of the first spur gear 5 and the second spur gear 6 meshing with each other. The first spur gear 5 is sleeved on the outer ring of the first rotating shaft 2, and the second spur gear 6 is sleeved on the outer ring of the second rotating shaft 7. An adjustment groove 8 is opened inside the two sets of side plates 1, and the transmission structure is located inside the adjustment groove 8. A ratchet 3 rotates coaxially on the outer ring of the first rotating shaft 2, and a pawl 4 meshes with the outer surface of the ratchet 3. The ratchet 3 rotates counterclockwise. Both the ratchet 3 and the pawl 4 are located inside the adjustment groove 8. There is one set of ratchet 3 and pawl 4, and the ratchet 3 and the pawl 4 are located inside the right side plate 1. Both the first rotating shaft 2 and the second rotating shaft 7 pass through the adjustment groove 8. The first rotating shaft 2 is located directly below the second rotating shaft 7. One end of both the first rotating shaft 2 and the second rotating shaft 7 is fixed with a... The disc 9 has multiple sets of adjustment structures inside. The adjustment structures corresponding to the first rotating shaft 2 and the second rotating shaft 7 are staggered. The adjustment structures are used to push and clamp the plastic products. The adjustment structure includes a plastic spring 11, a top block 12 and an arc slope 13. A limiting groove 10 is opened inside the disc 9. The disc 9 is symmetrically distributed along the center line of the top surface of the trimming mechanism. The adjustment structure and the limiting groove 10 are distributed around the virtual central axis of the disc 9. The adjustment structure is located inside the limiting groove 10. The top of the plastic spring 11 is fixed to the top of the limiting groove 10. The bottom of the plastic spring 11 is fixed to the top block 12 and the plastic spring 11 is arc-shaped. The bottom of the top block 12 is located on the outside of the disc 9. The arc slope 13 is located on both sides of the top block 12 and the arc slope 13 is semi-circular arc-shaped. A connecting shaft 15 is fixed between the discs 9 at one end of the two sets of first rotating shafts 2. The adjustment structure is located behind the support plate 14.
[0030] Specifically, since the two sides of the plastic product are placed between two discs 9, the limiting grooves 10 inside the discs 9 provide movement space for the adjustment structure, as shown in the figure. Figure 6-8 The plastic spring 11 is made of polyurethane elastomer or other materials that achieve good elasticity, long-term repeated compression, and do not leave indentations on the surface of the plastic product when clamped. Therefore, when the plastic spring 11 pushes the top block 12 under its own elastic force, the top block 12 moves towards the outer ring of the disk 9, thereby clamping the plastic product. (Refer to...) Figure 6 and 7 It can be seen that the upper disc 9 does not have a limiting groove 10 inside, but only a top block 12 fixed to the side surface of the disc 9. This allows the bottom top block 12 to be used to compress the plastic product upward under the elastic force of the plastic spring sheet 11, thereby improving its clamping ability and facilitating trimming. Meanwhile, referring to... Figure 6It is known that the limiting groove 10 is relatively small, limiting the curvature of the plastic spring 11. The curved slope 13 on the top block 12, when rotated by the disc 9, allows the edge of the top block 12 to contact the plastic product. The curved slope 13 has no sharp edges, thus preventing scratches on the surface of the plastic product. After clamping the plastic product, the burrs on the plastic product need to be ground down, referring to… Figure 5 At this point, the first rotating shaft 2 needs to be rotated counterclockwise. The first spur gear 5 on the first rotating shaft 2 drives the second spur gear 6 on the second rotating shaft 7 to mesh with each other, realizing the opposite rotation of the first rotating shaft 2 and the second rotating shaft 7. Furthermore, through the action of the connecting shaft 15, the first rotating shaft 2 and the second rotating shaft 7 on the other side plate 1 of the trimming mechanism will rotate accordingly. (Refer to...) Figure 7 Finally, the relatively misaligned top block 12 rotates around the virtual central axis of the disk 9, propelling the plastic product forward, thereby enabling the grinding wheel to trim the edges of the plastic product; (Refer to...) Figure 5 It can be seen that the direction of the ratchet 3 forces the second rotating shaft 2 to rotate only counterclockwise. The other side of the pawl 4 is always attached to the ratchet 3 under the action of gravity, so the second rotating shaft 2 can only rotate in one direction, that is, the plastic product can only move forward. The burr edge is constantly attached to the grinding wheel and is ground. After the edge is trimmed, the grinding wheel is moved to the edge of the support, so that the plastic product can be taken out.
[0031] In use, the operator first places the plastic product to be trimmed flat on the support plate 14, aligning the edge to be trimmed with one side of the grinding wheel, and placing its two sides between the upper and lower discs 9 respectively. The discs 9 have an adjustment structure for automatically clamping the plastic product. The plastic spring 11 in the adjustment structure is made of polyurethane elastomer and has good elastic recovery. Under the constraint of the limiting groove 10, the spring 11 drives the top block 12 to lightly press the edge of the plastic product along the outside of the discs 9, so that it is firmly clamped without leaving indentations. Subsequently, the first rotating shaft 2 rotates counterclockwise in one direction under the constraint of the ratchet 3 and pawl 4 mechanism, driving the first spur gear 5 to mesh with the second spur gear 6, thereby driving the second rotating shaft 7 to rotate synchronously in the opposite direction. The inner top blocks 12 of the disc 9 connected to the two rotating shafts are arranged in a staggered form. When the rotating shaft 2 drives the disc 9 to rotate, the plastic product is driven to move forward along the trimming path through the staggered top blocks 12. Its edge gradually approaches the surface of the grinding wheel for continuous trimming during the rotation until the entire burr area is uniformly polished.
[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A trimming mechanism for the production of plastic products, comprising two sets of side plates (1) and a support plate (14) for supporting the plastic products, characterized in that: The two sets of side plates (1) drive the first rotating shaft (2) and the second rotating shaft (7) to rotate in opposite directions through the transmission structure. One end of the first rotating shaft (2) and the second rotating shaft (7) is fixed with a disc (9). The disc (9) is provided with multiple sets of adjustment structures. The adjustment structures corresponding to the first rotating shaft (2) and the second rotating shaft (7) are misaligned. The adjustment structures are used to push the plastic product and clamp the plastic product.
2. The trimming mechanism for plastic product manufacturing according to claim 1, characterized in that: The support plate (14) has an "L" shaped structure and is fixed between two sets of side plates (1). The two sets of side plates (1) are symmetrically distributed about the center of the trimming mechanism.
3. The trimming mechanism for plastic product manufacturing according to claim 1, characterized in that: The transmission structure includes a first spur gear (5) and a second spur gear (6). The outer surfaces of the first spur gear (5) and the second spur gear (6) mesh with each other. The first spur gear (5) is sleeved on the outer ring of the first rotating shaft (2), and the second spur gear (6) is sleeved on the outer ring of the second rotating shaft (7). Adjustment grooves (8) are provided inside both sets of side plates (1), and the transmission structure is located inside the adjustment grooves (8).
4. A trimming mechanism for plastic product manufacturing according to claim 1, characterized in that: The first rotating shaft (2) has a ratchet (3) rotating coaxially on its outer ring. The ratchet (3) is engaged with a pawl (4). The ratchet (3) rotates counterclockwise. The ratchet (3) and the pawl (4) are both located inside the adjusting groove (8). There is a set of ratchet (3) and pawl (4), and the ratchet (3) and pawl (4) are located inside the right side plate (1).
5. A trimming mechanism for producing plastic products according to claim 4, characterized in that: The first rotating shaft (2) and the second rotating shaft (7) both pass through the adjustment groove (8), with the first rotating shaft (2) located directly below the second rotating shaft (7).
6. A trimming mechanism for producing plastic products according to claim 1, characterized in that: The adjustment structure includes a plastic spring (11), a top block (12), and an arc slope (13). A limiting groove (10) is opened in the disc (9). The disc (9) is symmetrically distributed along the center line of the top surface of the trimming mechanism. The adjustment structure and the limiting groove (10) are distributed around the virtual central axis of the disc (9). The adjustment structure is located inside the limiting groove (10). The top of the plastic spring (11) is fixed to the top of the limiting groove (10). The bottom of the plastic spring (11) is fixed to the top of the top block (12). The plastic spring (11) is arc-shaped. The bottom of the top block (12) is located outside the disc (9). The arc slope (13) is located on both sides of the top block (12). The arc slope (13) is a semi-circular arc structure.
7. A trimming mechanism for producing plastic products according to claim 1, characterized in that: A connecting shaft (15) is fixed between the discs (9) at one end of the two sets of first rotating shafts (2), and the adjustment structure is located behind the support plate (14).