Positioning device for surface treatment of injection molded part

Abstract

The utility model discloses a positioning device for surface treatment of injection molded parts, which is characterized by comprising a bottom plate, a product positioning part and a longitudinal cylinder, the product positioning part and the longitudinal cylinder are mounted on the bottom plate, a longitudinal slide rail is arranged on the bottom plate, and the longitudinal cylinder drives the product positioning part to move back and forth along the longitudinal slide rail; the product positioning part comprises a sliding frame, a product positioning block and two positioning assemblies, and a product containing groove is formed in the top of the product positioning block. The positioning assembly comprises a supporting piece, a pressing rod and a vertical air cylinder, the vertical air cylinder and the supporting piece are installed on the portion, beside the product positioning block, of the sliding frame, the supporting piece is arranged between the vertical air cylinder and the product positioning block, and the middle of the pressing rod is rotationally connected with the top of the supporting piece. The outer end of the pressing rod is rotationally connected with an output shaft at the top of the vertical air cylinder, and a pressing block is arranged at the bottom of the inner end of the pressing rod. According to the utility model, the positioning convenience is improved, and the labor intensity of operators is reduced.

Description

Technical Field

[0001] This utility model relates to the field of injection molding production and processing, and in particular to a positioning device for injection molding surface treatment, used as a positioning device for injection molding surface treatment equipment. Background Technology

[0002] Some plastic parts that need to be assembled use snap-fit, screw-fit, or adhesive assembly methods. For adhesive plastic parts, the surfaces to be bonded need to be pre-sanded to a smooth finish before using specialized adhesive to bond the objects or plastic parts to the sanded area. In existing technology, sanding is done manually by placing the product under the sanding area. This method is inefficient (the material handling position is below the sanding mechanism, resulting in poor visibility and inconvenient material handling), and there is a safety hazard of being injured by the sanding equipment during material handling. Summary of the Invention

[0003] The purpose of this invention is to provide a positioning device for surface treatment of injection molded parts. By using this structure, the convenience of product positioning is improved and safety hazards are reduced.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a positioning device for surface treatment of injection molded parts, including a base plate, a product positioning part mounted on the base plate and a longitudinal cylinder, wherein the base plate is provided with a longitudinal slide rail, the product positioning part is slidably disposed on the longitudinal slide rail, and the longitudinal cylinder drives the product positioning part to move back and forth along the longitudinal slide rail;

[0005] The product positioning part includes a carriage, a product positioning block installed in the middle of the top surface of the carriage, and two sets of positioning components symmetrically arranged on the left and right sides of the carriage. The top of the product positioning block is provided with a product placement groove.

[0006] The positioning assembly includes a support member, a pressure rod, and a vertical cylinder. The vertical cylinder and the support member are mounted on a slide next to the product positioning block. The support member is positioned between the vertical cylinder and the product positioning block. The middle part of the pressure rod is rotatably connected to the top of the support member. The outer end of the pressure rod is rotatably connected to the output shaft at the top of the vertical cylinder. A pressure block is provided at the bottom of the inner end of the pressure rod.

[0007] When the vertical cylinder output shaft is extended, the pressure block is positioned directly above the product placement slot; when the vertical cylinder output shaft is retracted, the pressure block is positioned away from the product placement slot.

[0008] In the above technical solution, a sinking groove is provided on the left and right sides of the slide, the top of the vertical cylinder is installed on the bottom surface of the slide below the sinking groove, and the output shaft of the vertical cylinder passes through the sinking groove and is rotatably connected to the outer end of the pressure rod.

[0009] In the above technical solution, the support member includes a support block and a connecting block. The bottom of the support block is fixedly installed on the top surface of the carriage. The bottom of the connecting block is rotatably connected to the top of the support block. The middle part of the pressure rod is rotatably connected to the top of the connecting block.

[0010] In the above technical solution, when the vertical cylinder output shaft is extended, the top of the connecting block is positioned above the support block;

[0011] With the vertical cylinder output shaft retracted, the pressure block is positioned below and beside the product positioning block, and the top of the connecting block rotates to directly above the sinking groove.

[0012] In the above technical solution, two strip-shaped through grooves parallel to the longitudinal slide rail are respectively provided on both sides of the base plate. Each vertical cylinder is positioned opposite one of the strip-shaped through grooves, and the bottom of the vertical cylinder passes through the strip-shaped through groove and is positioned below the bottom surface of the base plate.

[0013] In the above technical solution, the product positioning block is detachably installed on the top of the carriage.

[0014] In the above technical solution, the product positioning block is placed on the top of the carriage; the top of the carriage is provided with four L-shaped limiting blocks, and the four corners of the product positioning block abut against the inner sidewalls of the four L-shaped limiting blocks respectively.

[0015] In the above technical solution, the longitudinal cylinder is arranged parallel to the longitudinal slide rail, and the output shaft at the front end of the longitudinal cylinder is connected to the bottom of the slide.

[0016] A vertical plate is also provided on the rear side of the top of the base plate. A limiting bolt is screwed onto the vertical plate. The front end of the limiting bolt is located on the front side of the vertical plate, and the front end of the limiting bolt is facing the slide.

[0017] The front end of the limiting bolt is provided with a rubber buffer block. When the longitudinal cylinder output shaft is retracted, the rear end face of the slide rests against the rubber buffer block.

[0018] In the above technical solution, the base plate is provided with a front sensor and a rear sensor, and the bottom of the carriage is provided with a detection plate. When the longitudinal cylinder output shaft is extended, the detection plate is positioned facing the front sensor, and when the longitudinal cylinder output shaft is retracted, the detection plate is positioned facing the rear sensor.

[0019] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0020] 1. In this utility model, the product placement groove is used to position the product, and the pressure rod is used to limit the product. The longitudinal groove is used to move the product to the loading position and the processing position, which can improve the convenience of product positioning and reduce safety hazards.

[0021] 2. The pressure rod in this utility model has a large rotation angle. The inner end of the pressure rod can be rotated to the top of the product placement slot to position the product, or it can be rotated to the outside of the product placement slot without affecting the product placement and retrieval, thus ensuring the convenience of product positioning and retrieval. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure in Embodiment 1 of this utility model;

[0023] Figure 2 yes Figure 1 Top view;

[0024] Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure;

[0025] Figure 4 This is a schematic diagram of the product positioning part in Embodiment 1 of this utility model.

[0026] The components include: 1. Base plate; 2. Longitudinal cylinder; 3. Longitudinal slide rail; 4. Slide frame; 5. Product positioning block; 6. Product placement slot; 7. Support component; 8. Pressure rod; 9. Vertical cylinder; 10. Pressure block; 11. Sinking groove; 12. Strip through groove; 13. Support block; 14. Connecting block; 15. L-shaped limit block; 16. Vertical plate; 17. Limit bolt; 18. Rubber buffer block; 19. Front sensor; 20. Rear sensor; 21. Detection plate. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0028] Example 1: See Figure 1-4 As shown, a positioning device for surface treatment of injection molded parts includes a base plate 1, a product positioning part mounted on the base plate 1, and a longitudinal cylinder 2. The base plate 1 is provided with a longitudinal slide rail 3, the product positioning part is slidably disposed on the longitudinal slide rail 3, and the longitudinal cylinder 2 drives the product positioning part to move back and forth along the longitudinal slide rail 3.

[0029] The product positioning part includes a carriage 4, a product positioning block 5 installed in the middle of the top surface of the carriage 4, and two sets of positioning components symmetrically arranged on the left and right sides of the carriage 4. The top of the product positioning block 5 is provided with a product placement groove 6.

[0030] The positioning assembly includes a support member 7, a pressure rod 8, and a vertical cylinder 9. The vertical cylinder 9 and the support member 7 are mounted on a slide 4 next to the product positioning block 5. The support member 7 is located between the vertical cylinder 9 and the product positioning block 5. The middle part of the pressure rod 8 is rotatably connected to the top of the support member 7. The outer end of the pressure rod 8 is rotatably connected to the output shaft at the top of the vertical cylinder 9. A pressure block 10 is provided at the bottom of the inner end of the pressure rod 8.

[0031] When the vertical cylinder output shaft is extended, the pressure block is positioned directly above the product placement slot; when the vertical cylinder output shaft is retracted, the pressure block is positioned away from the product placement slot.

[0032] In this embodiment, a grinding mechanism is provided at the rear of the base plate. When the output shaft of the longitudinal cylinder retracts, it drives the product positioning part to move backward and face the grinding mechanism, so that the product placed in the product placement slot can be ground at the position where grinding is required. When the output shaft of the longitudinal cylinder extends, it drives the product positioning part to move forward away from the grinding mechanism, making it easier for the operator to pick up and put down the material.

[0033] In actual use, initially, the longitudinal cylinder output shaft extends, causing the product positioning mechanism to move forward along the longitudinal slide rail. Simultaneously, the vertical cylinder output shaft retracts, moving the pressure block away from the product placement slot, and the inner end of the pressure rod also moves away from the product placement slot. Operators can then easily remove the product from or place it into the slot. Once the product to be processed is placed in the slot, the vertical cylinder output shaft extends, pushing the pressure rod to rotate around the support, causing the inner end of the pressure rod to rotate towards the product placement slot until the bottom surface of the pressure block abuts against the top side surface of the product, thus securing the product within the slot. Then, the longitudinal cylinder output shaft retracts, moving the product positioning part backward to the grinding mechanism. The grinding mechanism then grinds the area above the product placement slot that requires grinding. Since the two pressure blocks press on the left and right sides of the top surface of the product respectively, limiting the product to the product placement groove, the product will remain stably in the product placement groove when the product positioning part moves, without displacement. During the polishing process, whether polishing the top surface, side surface or the sloping side surface of the product, the downward pressure and lateral force applied to the product by the polishing mechanism can be stably pressed into the product placement groove by the pressure blocks, ensuring the surface polishing effect of the product.

[0034] Of course, it's not limited to product polishing; it can also be used for positioning other surface treatments on injection-molded parts, such as screen printing. The positioning device in this invention can be used to feed the product into the screen printing area for screen printing. In this method, there's no need for manual placement of the product directly under the screen printing mechanism, allowing operators to stay away from the mechanism and reducing safety hazards. It can also be used to apply a protective film to the product surface. The positioning device feeds the product into the film-applying mechanism for surface film application (to the location requiring the protective film). It can also be used for painting or other surface treatments on the corresponding areas. In this structure, there's no need for manual feeding of the product into the surface treatment mechanism. The longitudinal cylinder output shaft drives the product positioning part to move, placing the product on it. The pressure block restrains the product, allowing it to be fed into or removed from the surface treatment mechanism, reducing safety hazards and improving operational convenience.

[0035] Furthermore, in this embodiment, the product is moved out of the surface treatment mechanism during loading and unloading, providing a better field of vision and making the process more convenient and efficient. While the product is being fed into the surface treatment mechanism, the operator can also perform packaging or other actions, making full use of this time. Alternatively, two devices can be operated simultaneously: one positioning device for loading and unloading, and the other for feeding the product into the grinding mechanism for processing.

[0036] See Figure 2-4 As shown, a sinking groove 11 is provided on the left and right sides of the slide 4. The top of the vertical cylinder 9 is installed on the bottom surface of the slide 4 below the sinking groove 11. The output shaft of the vertical cylinder 9 passes through the sinking groove 11 and is rotatably connected to the outer end of the pressure rod 8. The outer end of the pressure rod is located above the sinking groove.

[0037] The recessed groove allows for a shorter support height, and the vertical cylinder can be positioned at the bottom of the slide without occupying the top space of the slide. It also ensures that during the extension of the vertical cylinder output shaft, it can stably push the inner end of the pressure rod to rotate toward the product placement groove, and press the product into the product placement groove through the pressure plate at the inner end of the pressure rod.

[0038] See Figure 2 , 3 As shown, the base plate 1 has two strip-shaped through grooves 12 on both sides, which are parallel to the longitudinal slide rail 3. The strip-shaped through grooves are arranged longitudinally along the extension direction of the longitudinal slide rail. Each vertical cylinder 9 is positioned opposite one of the strip-shaped through grooves 12, and the bottom of the vertical cylinder 9 passes through the strip-shaped through groove 12 and is positioned below the bottom surface of the base plate 1.

[0039] Since the vertical cylinder has a certain length, it is placed at the bottom of the carriage. Therefore, in order to ensure the normal movement of the carriage, a strip groove is set on the bottom plate to allow the vertical cylinder to move. This allows the vertical cylinder to move normally when the output shaft of the longitudinal cylinder drives the carriage. The overall height of the carriage can be set lower, reducing material usage and space occupation, and lowering costs.

[0040] See Figure 1 , 3 As shown in Figure 4, the support member 7 includes a support block 13 and a connecting block 14. The bottom of the support block 13 is fixedly installed on the top surface of the slide 4. The bottom of the connecting block 14 is rotatably connected to the top of the support block 13. The middle part of the pressure rod 8 is rotatably connected to the top of the connecting block 14.

[0041] With the vertical cylinder output shaft extended, the top of the connecting block is positioned above the support block;

[0042] With the vertical cylinder output shaft retracted, the pressure block is positioned below and beside the product positioning block, and the top of the connecting block rotates to directly above the sinking groove.

[0043] In this embodiment, the middle part of the pressure rod is rotatably connected to the support member, while the vertical cylinder is located on the outside of the support member. Under normal circumstances, if the rotatable connection between the pressure rod and the support member cannot be offset laterally or vertically relative to the top surface of the slide, after the output shaft of the vertical cylinder retracts, the pressure block will still be partially located directly above the product placement slot. Although the height distance between the pressure block and the product placement slot will be larger, in this structure, the connection between the vertical cylinder and the slide also needs to be rotatably connected, which will cause the vertical cylinder to tilt when the output shaft of the vertical cylinder extends and retracts. At the same time, the width of the strip groove will be larger, thus occupying a larger width space. Therefore, in this embodiment, the support component uses a support block and a connecting block. The bottom of the support block is fixedly connected to the base plate, the bottom of the connecting block is rotatably connected to the top of the support block, the middle of the pressure rod is rotatably connected to the top of the connecting block, and the output shaft of the vertical cylinder is rotatably connected to the outer end of the pressure rod. Since the output shaft of the vertical cylinder can only extend and retract vertically, meaning the outer end of the pressure rod can only move vertically, during the retraction of the output shaft, the outer end of the pressure rod will be pulled downwards. Simultaneously, the pressure rod will pull the top of the connecting component outwards until the connecting block and the support block are perpendicular, forming a 90° angle. In this state, the pressure rod will be in a vertical position, vertically positioned directly above the output shaft of the vertical cylinder. In this case, the top of the product placement slot can be fully opened. When the product is taken out of or placed into the product placement slot, the pressure rod will not affect the product's placement or removal, improving the convenience of handling. When the pressure block is needed to press the product, the output shaft of the vertical cylinder extends, driving the outer end of the pressure rod to move upward. At the same time, it also pushes the top of the connecting block to rotate upward toward the support, and drives the inner end of the pressure rod to rotate toward the product placement slot. When the connecting block and the support block are in the same straight line, it moves to the limit position. At this time, the pressure rod is perpendicular to the support block and also perpendicular to the output shaft of the vertical cylinder. At this time, the pressure block is directly above the product placement slot. In the process of the connecting block and the support block being perpendicular to each other and in the same straight line, if the pressure block presses against the top surface of the product, the product can be pressed.

[0044] The product positioning block is detachably installed on the top of the carriage. This allows for the replacement of different product positioning blocks in different product placement slots according to the shape of the product, enabling the positioning of products with varying sizes and shapes within a certain range, thus increasing applicability and reducing costs.

[0045] See Figure 3 , 4As shown, the product positioning block 5 is placed on top of the slide 4; the top of the slide 4 is provided with four L-shaped limiting blocks 15, and the four corners of the product positioning block abut against the inner sidewalls of the four L-shaped limiting blocks respectively. The four L-shaped limiting blocks directly limit the four corners of the product positioning block, preventing it from moving forward, backward, left, or right relative to the slide and from rotating. The slide supports the product positioning block, preventing it from moving upward. After the product is placed in the product placement slot, the pressure block presses the product and the product positioning block onto the slide, preventing both from moving upward. This achieves six degrees of freedom (up, down, left, right, forward, and backward) for the product positioning block. Furthermore, since the product positioning block is not a cylindrical or conical rotatable structure, it cannot rotate, ensuring the positioning effect and not affecting its disassembly and replacement, making disassembly and replacement convenient.

[0046] See Figure 2 , 3 As shown, the longitudinal cylinder 2 is arranged parallel to the longitudinal slide rail 3, and the output shaft at the front end of the longitudinal cylinder 2 is connected to the bottom of the slide 4;

[0047] A vertical plate 16 is also provided on the rear side of the top of the base plate 1. A limiting bolt 17 is screwed onto the vertical plate 16. The front end of the limiting bolt 17 is located on the front side of the vertical plate 16, and the front end of the limiting bolt 17 is facing the slide.

[0048] The front end of the limiting bolt 17 is provided with a rubber buffer block 18. When the output shaft of the longitudinal cylinder 2 is retracted, the rear end face of the slide 4 abuts against the rubber buffer block 18.

[0049] The limiting bolts mechanically limit the backward movement of the slide when the longitudinal cylinder retracts, ensuring the product on the positioning section is precisely aligned with the surface treatment mechanism, guaranteeing the surface treatment accuracy and effect. The rubber buffer blocks prevent rigid collisions between the slide and the limiting bolts, reducing noise and preventing slide wear. Furthermore, the limiting bolts, which can rotate on the vertical plate, allow adjustment of the longitudinal distance between the limiting bolts and the rear end face of the longitudinal cylinder. This adjustment controls the backward movement distance of the product positioning section driven by the longitudinal cylinder, ensuring optimal surface treatment results. It also allows for energy-efficient adjustments based on product position, expanding its applicability.

[0050] See Figure 1-3As shown, the base plate 1 is provided with a front sensor 19 and a rear sensor 20, and the bottom of the slide 4 is provided with a detection plate 21. When the output shaft of the longitudinal cylinder 2 is extended, the detection plate 21 is positioned facing the front sensor 19. When the output shaft of the longitudinal cylinder 2 is retracted, the detection plate 21 is positioned facing the rear sensor 20.

[0051] The front and rear sensors are electrically connected to the longitudinal and vertical cylinders, as well as the surface treatment mechanism. When the carriage moves to the corresponding positions, the front and rear sensors can detect whether the sensing plate is in position to control the operation of the longitudinal and vertical cylinders, whether their output shafts extend or retract, and whether the surface treatment mechanism operates normally or performs other actions. The front and rear sensors can be used for electrical linkage with the longitudinal and vertical cylinders, and also with the surface treatment mechanism.

Claims

1. A positioning device for surface treatment of injection molded parts, characterized in that: The device includes a base plate, a product positioning part mounted on the base plate, and a longitudinal cylinder. The base plate is provided with a longitudinal slide rail, the product positioning part is slidably disposed on the longitudinal slide rail, and the longitudinal cylinder drives the product positioning part to move back and forth along the longitudinal slide rail. The product positioning part includes a carriage, a product positioning block installed in the middle of the top surface of the carriage, and two sets of positioning components symmetrically arranged on the left and right sides of the carriage. The top of the product positioning block is provided with a product placement groove. The positioning assembly includes a support member, a pressure rod, and a vertical cylinder. The vertical cylinder and the support member are mounted on a slide next to the product positioning block. The support member is positioned between the vertical cylinder and the product positioning block. The middle part of the pressure rod is rotatably connected to the top of the support member. The outer end of the pressure rod is rotatably connected to the output shaft at the top of the vertical cylinder. A pressure block is provided at the bottom of the inner end of the pressure rod. When the vertical cylinder output shaft is extended, the pressure block is positioned directly above the product placement slot; when the vertical cylinder output shaft is retracted, the pressure block is positioned away from the product placement slot.

2. The positioning device for surface treatment of injection molded parts according to claim 1, characterized in that: The slide has a sinking groove on each of its left and right sides. The top of the vertical cylinder is mounted on the bottom surface of the slide below the sinking groove. The output shaft of the vertical cylinder passes through the sinking groove and is rotatably connected to the outer end of the pressure rod.

3. The positioning device for surface treatment of injection molded parts according to claim 2, characterized in that: The support component includes a support block and a connecting block. The bottom of the support block is fixedly installed on the top surface of the carriage. The bottom of the connecting block is rotatably connected to the top of the support block. The middle part of the pressure rod is rotatably connected to the top of the connecting block.

4. The positioning device for surface treatment of injection molded parts according to claim 3, characterized in that: With the vertical cylinder output shaft extended, the top of the connecting block is positioned above the support block; With the vertical cylinder output shaft retracted, the pressure block is positioned below and beside the product positioning block, and the top of the connecting block rotates to be directly above the sinking groove.

5. The positioning device for surface treatment of injection molded parts according to claim 1, characterized in that: The base plate has two strip-shaped through slots on both sides, which are parallel to the longitudinal slide rail. Each vertical cylinder is positioned opposite one of the strip-shaped through slots, and the bottom of the vertical cylinder passes through the strip-shaped through slot and is positioned below the bottom surface of the base plate.

6. The positioning device for surface treatment of injection molded parts according to claim 1, characterized in that: The product positioning block is detachably mounted on the top of the carriage.

7. The positioning device for surface treatment of injection molded parts according to claim 6, characterized in that: The product positioning block is placed on the top of the carriage; the top of the carriage is provided with four L-shaped limiting blocks, and the four corners of the product positioning block abut against the inner sidewalls of the four L-shaped limiting blocks respectively.

8. The positioning device for surface treatment of injection molded parts according to claim 1, characterized in that: The longitudinal cylinder is arranged parallel to the longitudinal slide rail, and the output shaft at the front end of the longitudinal cylinder is connected to the bottom of the slide. A vertical plate is also provided on the rear side of the top of the base plate. A limiting bolt is screwed onto the vertical plate. The front end of the limiting bolt is located on the front side of the vertical plate, and the front end of the limiting bolt is facing the slide. The front end of the limiting bolt is provided with a rubber buffer block. When the longitudinal cylinder output shaft is retracted, the rear end face of the slide rests against the rubber buffer block.

9. The positioning device for surface treatment of injection molded parts according to claim 1, characterized in that: The base plate is equipped with a front sensor and a rear sensor, and the bottom of the carriage is equipped with a detection plate. When the longitudinal cylinder output shaft is extended, the detection plate is positioned facing the front sensor, and when the longitudinal cylinder output shaft is retracted, the detection plate is positioned facing the rear sensor.

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