Polishing clamp for parting line of injection molded part

Abstract

The utility model discloses an injection molding part parting line polishing clamp which comprises a clamping part, a first clamping part, a second clamping part, a third clamping part, a fourth clamping part and a fourth clamping part. The clamping part comprises a fixed end and a free end opposite to each other in the first direction, and a penetrating hole is formed in the first direction; the locking part is arranged in the through hole in a penetrating manner; the telescopic mechanism is connected between the clamping piece and the locking part and is configured to drive the locking part to move in the direction intersecting with the first direction so as to lock or separate the locking part and the injection molding piece; the free end is in concave-convex fit with the injection molding part. Through the arrangement of the clamping piece and the locking part, secondary positioning is carried out on the injection molding piece, and the fixing stability of the injection molding piece is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a clamp for polishing the parting line of an injection molded part. Background Art

[0002] After the injection molding is completed, there will be a parting line on the surface of the injection molded part. Since the parting line is hard and sharp, it affects the quality of the injection molded part and the visual effect. Therefore, the parting line needs to be polished.

[0003] In the prior art, the parting line polishing process for injection-molded automotive handlebars typically uses a manual handheld polisher, resulting in low polishing efficiency. Automated polishing, on the other hand, requires a fixture to clamp and secure the molded part, requiring high clamping stability. Due to the varying structures and parting line locations of injection-molded parts, the fixture must be designed to match the part design when polishing large quantities of parts. Currently, there are relatively few fixtures for polishing parting lines along the circumferential edge of injection-molded parts, resulting in poor stability. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects in the prior art and provide an injection molded parting line grinding fixture to improve the stability of the grinding fixture clamping in the automated grinding system and improve the grinding quality of the injection molded parting line.

[0005] In order to achieve the above technical effects, the technical solution of the utility model is: a parting line grinding fixture for injection molded parts, comprising:

[0006] The clamping member includes a fixed end and a free end opposite to each other along a first direction, and is provided with a through hole along the first direction;

[0007] a locking portion, disposed through the through hole;

[0008] a telescopic mechanism connected between the clamping member and the locking portion, and configured to drive the locking portion to move in a direction intersecting with the first direction to lock or separate the locking portion and the injection molded part;

[0009] The free end is matched with the injection molded part in a concave-convex manner.

[0010] The preferred technical solution is that the clamping member includes a base and a positioning main arm, the base is arranged at the fixed end, the positioning main arm is connected to the first surface of the base and extends to the free end along the first direction; the positioning main arm has a length limiting portion relative to the second direction; the second direction is the length direction of the base and is perpendicular to the first direction.

[0011] A preferred technical solution is that width limiting portions are convexly provided on two opposite sides of the positioning main arm along the third direction; the third direction is the width direction of the base and is perpendicular to the first direction and the second direction.

[0012] The preferred technical solution is that the free end of the positioning main arm has an injection molded part abutment surface facing away from the first surface; one end of the locking part is connected to the telescopic mechanism, and the other end is provided with an anti-disengagement hook; the anti-disengagement hook is removably arranged on the side of the injection molded part facing away from the base.

[0013] The preferred technical solution is that the telescopic mechanism includes a piston and a guide part, the guide part is fixed to the side of the base opposite to the first surface, one end of the piston is connected to the guide part and moves along the guide part, and the other end is connected to the locking part.

[0014] A preferred technical solution is that at least two locking portions are provided, and the two locking portions are provided at both ends of the base along the second direction.

[0015] A preferred technical solution is that the main positioning arm is detachably connected to the width limiting portion.

[0016] A preferred technical solution is that at least two positioning main arms are arranged at intervals along the second direction.

[0017] A preferred technical solution is that a rotating shaft is provided on a side of the base opposite to the positioning main arm.

[0018] The preferred technical solution is that the rotating shaft is a hollow structure, and the end of the rotating shaft away from the base is connected to a negative pressure device; the width limiting part, the length limiting part and the abutting surface of the injection molded part are all provided with adsorption holes, and the negative pressure device is connected to the adsorption holes.

[0019] The advantages and beneficial effects of the present invention are as follows: by setting the clamping piece and the locking part, the injection molded part is secondary positioned to achieve the fixation of the injection molded part; by setting the telescopic mechanism to control the locking part, the injection molded part and the fixture are easily fixed and separated from each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the three-dimensional structure of the injection molded part of the embodiment;

[0021] Figure 2 3D schematic diagram of the structure of the parting line grinding fixture for injection molded parts according to the embodiment;

[0022] Figure 3 2 is another schematic diagram of the three-dimensional structure of the parting line grinding fixture for injection molded parts according to the embodiment;

[0023] Figure 4It is a schematic diagram of the combined three-dimensional structure of the injection molded part and the injection molded part parting line grinding fixture;

[0024] Figure 5 yes Figure 4 A three-dimensional diagram of the connection between the injection molded part and the telescopic mechanism;

[0025] Figure 6 2 is a schematic diagram of the three-dimensional structure of a fixture for polishing the parting line of an injection molded part according to another embodiment;

[0026] In the figure: X: first direction, which is the thickness direction of the base; Y: second direction, which is the length direction of the base; Z: third direction, which is the width direction of the base; the first direction, the second direction and the third direction are perpendicular to each other.

[0027] 1. Clamping part; 10. Fixed end; 11. Free end; 12. Perforation; 13. Base; 130. First surface; 14. Positioning main arm; 140. Length limiting part; 141. Injection molded part abutment surface; 142. First arm; 143. Second arm; 15. Width limiting part; 2. Locking part; 20. Anti-unhooking; 3. Telescopic mechanism; 30. Piston; 31. Guide part; 4. Rotating shaft; 5. Negative pressure device; 6. Adsorption hole; a. Injection molded part; a1. Groove; a11. Groove unit; a2. Bottom wall; a3. Side wall; a4. Partition part. DETAILED DESCRIPTION

[0028] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise specified, “plurality” means more than two; the terms “upper”, “lower”, “left”, “right”, “inside”, “outside”, etc., indicating directions or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0030] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integrally molded connections; they can refer to mechanical connections or electrical connections; and they can refer to direct connections or indirect connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0031] like Figures 1-3As shown in the embodiment, a fixture for polishing the parting line of an injection molded part includes:

[0032] The clamping member 1 includes a fixed end 10 and a free end 11 opposite to each other along a first direction, and a through hole 12 is provided through the fixed end 10 and the free end 11 along the first direction.

[0033] The locking portion 2 is provided in the through hole 12;

[0034] a telescopic mechanism 3 connected between the clamping member 1 and the locking portion 2 and configured to drive the locking portion 2 to move in a direction intersecting with the first direction to lock or separate the locking portion 2 and the injection molded part a;

[0035] The free end 11 is matched with the injection molded part a in a concave-convex manner.

[0036] like Figure 1 The figure shows a schematic diagram of the three-dimensional structure of the injection molded part a fixedly clamped by the grinding fixture of the present invention. The injection molded part a is a type of automobile handle. The injection molded part a of this type has a groove a1. The groove a1 includes a curved bottom wall a2 and a side wall a3 circumferentially enclosed along the bottom wall a2. A plurality of partitions a4 are provided in the groove a1. The partitions a4 divide the groove a1 into a plurality of groove units a11. In the prior art, mechanical grinding has gradually replaced manual grinding. In particular, the use of mechanical grinding for the grinding of injection molded parts a with high demand can greatly improve the efficiency of grinding and reduce labor costs. Mechanical grinding has high requirements for the stability of the fixation of the injection molded part a. It is necessary to ensure that the injection molded part a will not fall out of the fixture during the process of clamping the injection molded part a for rotation and other displacements, thereby affecting the grinding quality and efficiency.

[0037] This embodiment designs a polishing fixture for the aforementioned injection molded part a. The free end 11 of the clamping member 1 engages the injection molded part a in a concave-convex manner. Specifically, the free end 11 of the clamping member 1 abuts the bottom wall a2 and side wall a3 of the groove a1 of the injection molded part a, thereby securing the injection molded part a in the third and fourth directions.

[0038] By providing the locking portion 2, the locking portion 2 moves along a direction intersecting with the first direction and is detachably connected to the injection molded part a, thereby facilitating the fixing, replacement, and removal of the injection molded part a.

[0039] Optionally, the telescopic mechanism 3 is pneumatically telescopic or elastically telescopic.

[0040] In this embodiment, the locking portion 2 extends from the fixed end 10 of the clamping member 1 through the through hole 12 to the free end 11 of the clamping member 1 along the first direction, with a gap between the locking portion 2 and the free end 11 .

[0041] In this embodiment, the telescopic mechanism 3 is fixedly connected to the clamping member 1, and the telescopic mechanism 3 is detachably fixedly connected to the locking portion 2. Furthermore, the locking portion 2 of the injection molded part a can be replaced to match the injection molded part a with different structures.

[0042] like Figures 1-3 As shown, in another preferred embodiment, the clamping member 1 includes a base 13 and a positioning main arm 14, the base 13 is arranged at the fixed end 10, the positioning main arm 14 is connected to the first surface 130 of the base 13 and extends to the free end 11 along the first direction; the positioning main arm 14 has a length limiting portion 140 relative to the third direction; the third direction is the length direction of the base 13 and is perpendicular to the first direction.

[0043] By providing the length limiting portion 140 , a group of opposite side walls a3 of the injection molded part a are abutted and limited, and the barrier portions a4 between the side walls a3 are abutted and limited, thereby limiting the injection molded part a from moving along the third direction.

[0044] In this embodiment, the main positioning arm 14 includes a first arm portion 142 along a first direction for securing the injection molded part a, and a second arm portion 143 located between the first arm portion 142 and the base 13. The second arm portion 143 extends the length of the main positioning arm 14. This allows for a gap between the base 13 and the sandpaper when the grinding fixture abuts against the sandpaper for friction, thereby allowing for a gap between the telescopic mechanism 3 fixed to the base 13 and the sandpaper, preventing water on the sandpaper from affecting the telescopic mechanism 3. Furthermore, this increases the movement space of the main positioning arm 14 and even the grinding fixture, facilitating adjustment of the grinding fixture's position. Specifically, the first arm portion 142 is the portion of the main positioning arm 14 where the width limiter 15 is provided.

[0045] like Figures 1-3 As shown, in another preferred embodiment, at least two main arms 14 are positioned at intervals along the third direction.

[0046] In this embodiment, the number of positioning main arms 14 is determined according to the number of partitions a4. The positioning main arms 14 and the partitions a4 are alternately arranged. The partitions a4 abut against each other to fix the partitions a4 and the injection molded part a.

[0047] The spacing arrangement of the positioning main arms 14 not only corresponds to the concave-convex matching of the partition parts a4 of the injection molded part a, but also further saves fixture materials, reduces the weight of the fixture itself, and facilitates the automated control of the grinding fixture to perform the grinding process.

[0048] like Figures 1-3 As shown, in another preferred embodiment, width limiting portions 15 are convexly provided on two opposite sides of the main arm 14 positioned along the fourth direction; the fourth direction is the width direction of the base 13 and is perpendicular to the first direction and the third direction.

[0049] By providing the width limiting portion 15 , the other set of side walls a3 opposite to the injection molded part a is abutted and limited, thereby limiting the injection molded part a from moving along the fourth direction.

[0050] The width limiting portion 15 is protruded from the positioning main arm 14, so that when the polishing fixture clamps the injection molded part a and rubs it with sandpaper for polishing, the positioning main arm 14 and the base 13 will not generate contact friction with the sandpaper to interfere with the polishing, which will waste sandpaper and increase production costs; at the same time, it saves fixture materials, reduces the fixture's own weight, reduces costs, and facilitates automated control of the fixture.

[0051] like Figures 1-3 As shown, in another preferred embodiment, the positioning main arm 14 is detachably connected to the width limiting portion 15 .

[0052] According to the different widths of the injection molded parts a, the width limiting portion 15 is replaced to adapt to the fixation of the injection molded parts a of different widths.

[0053] In this embodiment, the detachable connection is a threaded connection.

[0054] like Figures 1-3 As shown, in another preferred embodiment, the free end of the positioning main arm 14 has an injection molded part abutment surface 141 facing away from the first surface 130; one end of the locking portion 2 is connected to the telescopic mechanism 3, and the other end is provided with an anti-disengagement hook 20; the anti-disengagement hook 20 is removably arranged on the side of the injection molded part a facing away from the base 13.

[0055] The molded part a is restrained from moving in the first direction by the cooperation between the molded part abutting surface 141 and the anti-slip hook 20. Along the first direction, the length of the anti-slip hook 20 gradually decreases from the locking portion 2 toward a direction away from the locking portion 2, facilitating movement of the anti-slip hook 20 relative to the molded part a. Specifically, the molded part a can be placed or removed in the first direction by simply controlling the locking portion 2 to move in any direction intersecting the first direction.

[0056] Optionally, a suction cup is provided at one end of the locking portion 2 to fix the injection molded part a.

[0057] In this example, the distance between the anti-slip hook 20 and the base 13 is smaller than the distance between the injection molded part abutting surface 141 and the base 13 .

[0058] like Figures 1 to 5 As shown, in another preferred embodiment, the telescopic mechanism 3 includes a piston 30 and a guide portion 31, the guide portion 31 is fixed to the side of the base 13 opposite to the first surface 130, one end of the piston 30 is connected to the guide portion 31 and moves along the guide portion 31, and the other end is connected to the locking portion 2.

[0059] Optionally, the telescopic mechanism 3 is a pneumatic cylinder or an oil cylinder;

[0060] In this example, one end of the piston 30 is fixedly connected to the locking portion 2 , and the locking portion 2 adjusts the positional relationship between the locking portion 2 and the injection molded part a when the piston 30 moves along the guide portion 31 .

[0061] like Figures 1 to 5 As shown, in another preferred embodiment, at least two locking portions 2 are provided, and the two locking portions 2 are respectively provided at two ends of the base 13 along the third direction.

[0062] Providing two or more locking parts 2 can improve the stability of fixing the injection molded part a compared to providing only one locking part 2 .

[0063] like Figures 1 to 5 As shown, in another preferred embodiment, a rotating shaft 4 is provided on a side of the base 13 opposite to the positioning main arm 14 .

[0064] like Figures 1 to 6 As shown, in another preferred embodiment, the rotating shaft 4 is a hollow structure, and the end of the rotating shaft 4 away from the base 13 is connected to the negative pressure device 5; the width limiting portion 15, the length limiting portion 140 and the injection molded part abutment surface 141 are all provided with adsorption holes 6, and the negative pressure device 5 is connected to the adsorption holes 6.

[0065] The injection molded part a has dust and residual water stains after being polished. Therefore, after polishing, the injection molded part a is removed and usually needs to be cleaned using equipment such as an air gun.

[0066] In this embodiment, the clamp has a self-cleaning function, and uses a negative pressure device 5 and adsorption holes 6 to absorb dust and water stains remaining on the injection molded part a, integrating polishing and cleaning to improve efficiency.

[0067] Furthermore, by rotating the rotating shaft 4 at high speed, the injection molded part a is rotated at high speed, and the surface of the injection molded part a is cleaned based on the centrifugal effect.

[0068] The working steps of this utility model are as follows:

[0069] Step 1: Adjust the position of the locking part 2. Initially, the anti-disengagement hook 20 of the locking part 2 is set away from the injection molded part a.

[0070] Step 2: Place the injection molded part a on the fixture. The side wall a3 and the barrier portion a4 of the injection molded part a are in contact with the long side limiting portion and the width limiting portion 15 in a concave-convex manner. The bottom wall a2 of the injection molded part a is in contact with the injection molded part contact surface 141.

[0071] Step 3: Adjust the telescopic mechanism 3 so that the anti-disengagement hook 20 of the locking part 2 abuts against the injection molded part a;

[0072] Step 4: After polishing is completed, the negative pressure device 5 is started to absorb dust and water stains on the surface of the injection molded part a;

[0073] Step 5: Adjust the telescopic mechanism 3 so that the anti-disengagement hook 20 of the locking portion 2 is away from the injection molded part a, and then remove the injection molded part a.

[0074] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A parting line grinding fixture for injection molded parts, characterized in that: include: A clamping member (1) comprises a fixed end (10) and a free end (11) opposite to each other along a first direction, and a through hole (12) is provided through the fixed end along the first direction; A locking portion (2) is provided through the through hole (12); a telescopic mechanism (3), connected between the clamping member (1) and the locking portion (2), and configured to drive the locking portion (2) to move in a direction intersecting the first direction to lock or separate the locking portion (2) and the injection molded part (a); The free end (11) is in concave-convex fit with the injection molded part (a); The clamping member (1) includes a base (13) and a positioning main arm (14), wherein the base (13) is arranged at the fixed end (10), and the positioning main arm (14) is connected to the first surface (130) of the base (13) and extends along the first direction to the free end (11); the positioning main arm (14) has a length limiting portion (140) relative to the second direction; the second direction is the length direction of the base (13) and is perpendicular to the first direction.

2. The injection molded parting line grinding fixture according to claim 1, characterized in that: Width limiting portions (15) are convexly provided on two opposite sides of the positioning main arm (14) along a third direction; the third direction is the width direction of the base (13) and is perpendicular to both the first direction and the second direction.

3. The injection molded parting line grinding fixture according to claim 2, characterized in that: The free end of the positioning main arm (14) has an injection molded part contact surface (141) facing away from the first surface (130); one end of the locking portion (2) is connected to the telescopic mechanism (3), and the other end is provided with an anti-disengagement hook (20); the anti-disengagement hook (20) is removably provided on a side of the injection molded part (a) facing away from the base (13).

4. The injection molded part parting line grinding fixture according to claim 1, characterized in that: The telescopic mechanism (3) comprises a piston (30) and a guide portion (31), wherein the guide portion (31) is fixed to a side of the base (13) opposite to the first surface (130), one end of the piston (30) is connected to the guide portion (31) and moves along the guide portion (31), and the other end is connected to the locking portion (2).

5. The injection molded parting line grinding fixture according to claim 1, characterized in that: At least two locking portions (2) are provided, and the two locking portions (2) are respectively provided at two ends of the base (13) along the second direction.

6. The injection molded parting line grinding fixture according to claim 2, characterized in that: The main positioning arm (14) is detachably connected to the width limiting portion (15).

7. The injection molded parting line grinding fixture according to claim 2, characterized in that: At least two positioning main arms (14) are arranged at intervals along the second direction.

8. The injection molded parting line grinding fixture according to claim 3, characterized in that: A rotating shaft (4) is provided on the side of the base (13) opposite to the positioning main arm (14).

9. The injection molded parting line grinding fixture according to claim 8, characterized in that: The rotating shaft (4) is a hollow structure, and one end of the rotating shaft (4) away from the base (13) is connected to a negative pressure device (5); the width limiting portion (15), the length limiting portion (140) and the injection molded part abutting surface (141) are all provided with adsorption holes (6), and the negative pressure device (5) is connected to the adsorption holes (6).

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