Injection molding sprue shearing equipment for automobile injection molding part decoration strip

Abstract

The invention discloses injection molding sprue shearing equipment for automobile injection molding part decoration strips, and relates to the technical field of injection molding part waste recovery equipment, the injection molding sprue shearing equipment comprises an equipment support, a freezing structure and a clamp, the equipment support is provided with a bottom plate, the freezing structure is fixedly installed on the bottom plate, and the clamp is fixedly installed on the bottom plate; the equipment bracket comprises a bottom frame and a pressing bracket; the freezing structure comprises a mounting rod and an air injection rod; the clamp is arranged below the air injection rod; a blanking opening is formed in the bottom plate, a recycling box is arranged below the blanking opening, and an extruding and crushing structure is arranged in the recycling box; the extrusion crushing structure comprises an extrusion roller structure and a side suction structure; a crushing cutter structure is arranged below the extruding and crushing structure, the crushing cutter structure comprises a crushing cutter, and by means of the mode that frozen parts and unfrozen parts of sheared waste materials are separated, multiple procedures of sprue shearing, crushing, recycling and the like can be integrally completed.

Description

Technical Field

[0001] The invention relates to the technical field of recycling equipment for injection molded part waste, in particular to an injection molding gate shearing device for automobile injection molded part trims. Background Art

[0002] In high-end automotive interiors, soft-rubber materials such as TPU and TPE are widely used for complex curved decorative parts due to their excellent tactile feel and styling adaptability. Cryo-shearing technology (dry ice / liquid nitrogen) has become a mainstream gate removal solution because it avoids the scorch marks and burrs associated with traditional processes. However, its low temperature properties cause the sheared surface to absorb ambient moisture and form crystallized water, significantly restricting the material recycling chain.

[0003] During the cold shearing process, when the gate area rapidly cools to below -50°C, the material surface comes into contact with ambient moisture, forming water of crystallization. This water of crystallization exists at the fracture surface in the form of physical adsorption or hydrogen bonds, triggering a chain reaction during subsequent crushing and recycling: first, frictional heat from the crusher melts the water of crystallization, which, when mixed with the crushed material, causes the soft adhesive to stick together and clump, reducing pellet uniformity; second, the water penetrates into the material, triggering hydrolysis and breakage of the TPU / TPE molecular chains, reducing the mechanical properties of the recycled material by over 15%; and finally, residual water vaporizes during granulation, forming micropores, further degrading the quality of the recycled pellets.

[0004] To mitigate these risks, the current process requires hot air drying of sheared parts for over 12 hours, forcing the production line to operate in sections. Furthermore, detection of water of crystallization relies on offline spot checks. If drying is incomplete, moisture mixed into the recycled material and adherent material from the scraps can create a "wet grinding effect," directly contaminating the entire batch of recycled material. Summary of the Invention

[0005] The object of the present invention is to provide an injection molding gate shearing device for automobile injection molding trim strips to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: an injection gate shearing device for automobile injection molding trim strips, comprising a device bracket, a freezing structure, and a clamp, wherein the device bracket is provided with a base plate, the freezing structure is fixedly mounted on the base plate, and the clamp is fixedly mounted on the base plate; The equipment bracket includes a base frame and a downward pressing bracket, wherein the downward pressing bracket is arranged above the base frame; The freezing structure includes a mounting rod and an air jet rod, wherein the mounting rod is mounted on the bottom plate, the air jet rod is mounted on the mounting rod, and a press switch is provided on the top of the mounting rod; The clamp is arranged below the air injection rod; The bottom plate is provided with a material drop opening, a recovery box is provided below the material drop opening, and an extrusion crushing structure is provided in the recovery box; The extrusion and crushing structure includes an extrusion roller structure and a side suction structure. The extrusion roller structure crushes the gate waste by extrusion, and the side suction structure recovers and dries the crushed waste by suction. A crushing knife structure is provided below the extrusion and crushing structure. The crushing knife structure includes a crushing knife, and the crushing knife is used to cut and crush the waste.

[0007] Preferably, the chassis includes an electrical box and a support frame, and the electrical box is installed on the top of the support frame.

[0008] Preferably, the downward pressure bracket includes a cylinder, a support column and a downward pressure plate, the cylinder is installed on the top plate, the support column is provided with four parts symmetrically installed at the four corners and the bottom thereof is fixedly installed on the base frame, the top of the support column is fixedly connected to the top plate, the downward pressure plate is installed on the output shaft of the cylinder, and the downward pressure plate is used to install a tool for shearing the gate.

[0009] Preferably, a refrigerated airflow duct is provided inside the mounting rod, and the refrigerated airflow duct is communicated with the air injection rod.

[0010] Preferably, the lower surface of the air injection rod is provided with an air injection hole, and the position of the air injection hole corresponds to the gate position of the decorative strip.

[0011] Preferably, a baffle is provided on the side of the blanking port.

[0012] Preferably, the squeezing roller structure includes a squeezing roller and a squeezing wall, both ends of the squeezing roller are rotatably mounted on the recycling box, the squeezing wall is fixedly mounted on the side wall of the recycling box, the squeezing roller is provided with squeezing teeth, a crushing gap that decreases evenly from top to bottom is provided between the squeezing roller and the squeezing wall, and a motor is provided at the end of the squeezing roller.

[0013] Preferably, the side suction structure includes a suction box, a rolling dial, an airflow duct and a blocking door. The suction box is fixedly installed in the recycling box, and both ends of the rolling dial are rotatably installed in the suction box. The airflow duct includes two and both pass through the recycling box and are connected to the drying chamber where the rolling dial is located. A blanking channel is provided below the drying chamber, and the blocking door is installed below the blanking channel. The front end of the blocking door is rotatably installed on the suction box, and an electromagnet is provided on the tail end of the blocking door, and the electromagnet can be adsorbed on the suction box. Motor 2 is provided at the end of the rolling dial.

[0014] Preferably, the crushing blade structure further includes a rotating shaft and a third motor, the crushing blade comprises a plurality of pieces and is evenly arranged on the rotating shaft, and the end of the rotating shaft is connected to the third motor. Preferably, a filter is provided in the recovery box, and the filter is located below the crushing knife structure.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention uses a method of spraying a freezing airflow from the top to freeze the gate and perform shearing, which can achieve freezing shearing at the gate position. The freezing shearing leaves no residue at the gate, meeting product requirements; 2. The squeezing rollers in this invention can crush the frozen and sheared gate, separating the waste material carrying ice crystals from the soft rubber material head due to crushing. The crushed waste material is then taken away by the side suction structure through the suction airflow for separate drying. The remaining material head, which is made of soft rubber material, will not be crushed by squeezing, is large in volume and weight, and will not be taken away by the suction airflow, so it will fall below and continue to be cut and crushed. 3. The crushing knife structure provided in the invention can cut and crush the remaining material heads that fall in, and mix the waste materials that fall from the side suction structure and have dried the crystal water with the waste materials crushed by the crushing knife, and recycle them uniformly. By separating the frozen part of the sheared waste from the unfrozen part, multiple processes such as gate shearing, crushing, and recycling are completed in an integrated manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 A top view of the present invention; Figure 3 for Figure 2 Cross-sectional structure diagram at inner AA; Figure 4 for Figure 2 Cross-sectional structure diagram of inner BB; Figure 5 for Figure 4 A magnified view of the structure at inner C; Figure 6 Schematic diagram of the fixture, base plate, and freezing structure; Figure 7 It is a schematic diagram of the extrusion crushing structure and the crushing knife structure.

[0017] In the figure: 1-equipment bracket; 11-base frame; 111-electrical box, 112-support frame; 12-downward pressure bracket; 121-cylinder, 122-support column, 123-downward pressure plate, 124-top plate; 2-freezing structure; 21-installation rod; 22-jet rod; 23-press switch; 3-Clamp; 4-bottom plate; 41-feeding port; 411-baffle; 5-extrusion crushing structure; 51-extrusion roller structure; 511-extrusion roller, 512-extrusion wall, 513-extrusion teeth, 515-motor 1; 52-side suction structure; 521-suction box, 522-rolling dial, 523-airflow duct, 524-blocking door, 525-motor 2; 6-crushing blade structure; 61-crushing blade; 62-rotating shaft; 63-motor three; 7-Recycling bin. DETAILED DESCRIPTION

[0018] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0019] See also Figures 1 to 7 The present invention provides a technical solution: an injection molding gate shearing device for automobile injection molding trim strips, comprising a device bracket 1, a freezing structure 2, and a clamp 3, wherein the device bracket 1 is provided with a base plate 4, the freezing structure 2 is fixedly mounted on the base plate 41, and the clamp 3 is fixedly mounted on the base plate 4; The equipment support 1 includes a base frame 11 and a downward pressing support 12, and the downward pressing support 12 is arranged above the base frame 11; The freezing structure 2 includes a mounting rod 21 and an air jet rod 22. The mounting rod 21 is mounted on the bottom plate 4, and the air jet rod 22 is mounted on the mounting rod 21. A press switch 23 is provided on the top of the mounting rod 21. The clamp 3 is arranged below the air injection rod 22; The bottom plate 4 is provided with a drop opening 41, and a recovery box 7 is provided below the drop opening 41. The recovery box 7 is provided with an extrusion crushing structure 5; The extrusion and crushing structure 5 includes an extrusion roller structure 51 and a side suction structure 52. The extrusion roller structure 51 crushes the gate waste by extrusion, and the side suction structure 52 recovers and dries the crushed waste by suction. A crushing knife structure 6 is provided below the extrusion and crushing structure 5 . The crushing knife structure 6 includes a crushing knife 61 . The crushing knife 61 is used to cut and crush the waste.

[0020] In this embodiment, the base frame 11 includes an electrical box 111 and a support frame 112 . The electrical box 111 is installed on the top of the support frame 112 . The electrical box 111 is used to provide power to the entire device.

[0021] In this embodiment, the downward pressure bracket 12 includes a cylinder 121, a support column 122 and a downward pressure plate 123. The cylinder 121 is installed on the top plate 124. The support column 122 is provided with four parts symmetrically installed at the four corners and its bottom is fixedly installed on the base frame 11. The top of the support column 122 is fixedly connected to the top plate 124. The downward pressure plate 123 is installed on the output shaft of the cylinder 121. The downward pressure plate 123 is used to install a tool for shearing the gate. The cylinder 121 drives the downward pressure plate 123 and drives the tool on the downward pressure plate 123 to press down to shear the gate. The downward pressure plate 123 is used to press the press switch 23.

[0022] In this embodiment, a refrigerated airflow pipe is provided inside the mounting rod 21 , and the refrigerated airflow pipe is communicated with the air injection rod 22 , and the refrigerated airflow is sprayed to the gate position of the decorative strip through the air injection rod 22 .

[0023] In this embodiment, an air injection hole is provided on the lower surface of the air injection rod 22 . The position of the air injection hole corresponds to the gate position of the decorative strip, which facilitates freezing the gate position for subsequent shearing.

[0024] In this embodiment, a baffle 411 is provided on the side of the drop opening 41 , and the baffle is used to guide the sheared waste to fall downward into the recovery box 7 .

[0025] In this embodiment, the squeezing roller structure 51 includes a squeezing roller 511 and a squeezing wall 512. Both ends of the squeezing roller 511 are rotatably mounted on the recycling box 7, and the squeezing wall 512 is fixedly mounted on the side wall of the recycling box 7. The squeezing roller 511 is provided with squeezing teeth 513. A crushing gap 524 with a uniformly decreasing interval from top to bottom is provided between the squeezing roller 511 and the squeezing wall 512. A motor 515 is provided at the end of the squeezing roller 511. The squeezing roller 511 rotates to match the crushing gap 524 to squeeze and crush the frozen and brittle gate position in the waste that falls into it, and separate it from the unfrozen soft rubber material head connected to it, thereby separating the waste with crystalline water or ice crystals from the soft rubber material head.

[0026] In this embodiment, the side suction structure 52 includes a suction box 521, a rolling dial 522, an air flow duct 523 and a blocking door 524. The suction box 521 is fixedly installed in the recycling box 7, and the two ends of the rolling dial 522 are rotatably installed in the suction box 521. The air flow duct 523 includes two and both pass through the recycling box 7 and are connected to the drying chamber where the rolling dial 522 is located. A blanking channel is provided below the drying chamber, and the blocking door 524 is installed below the blanking channel. The front end of the blocking door 524 is rotatably installed on the suction box 521, and an electromagnet is provided on the tail end of the blocking door 524, which can be adsorbed on On the suction box 521, a motor 2 525 is provided at the end of the rolling dial wheel 522. After the push switch 23 is triggered by the lower pressure plate 123, the air flow duct 523 sucks outwards, so that suction is generated at the suction port of the suction box 521, and the waste crushed by the squeezing roller 511 is sucked into the drying chamber. When the push switch 23 is not triggered, the two air flow ducts 523 work separately, one for letting in dry hot air flow, and the other for sucking hot air flow outwards. The hot air flow will take away moisture. At the same time, the electromagnet of the blocking door 524 will be powered off after a certain period of drying, and the blocking door 524 will open under the action of gravity. The dried waste enters the position where the crushing knife structure 6 is located and waits to be mixed with the crushed material head.

[0027] In this embodiment, the crushing knife structure 6 also includes a rotating shaft 62 and a motor three 63. The crushing knife 61 includes several parts and is evenly arranged on the rotating shaft 62. The end of the rotating shaft 63 is connected to the motor three 63, and the crushing knife 61 crushes the fallen material.

[0028] In this embodiment, a filter is provided in the recycling box 7 , and the filter is located below the crushing knife structure 6 . The filter can help screen and crush substandard waste materials.

[0029] Working principle: When in use, first clamp the decorative strip through the clamp 3, and the clamp 3 is set according to the structural requirements of the decorative strip. Then, a freezing airflow is sprayed to the gate through the air jet pipe 22, so that the gate is quickly frozen and brittle, which is convenient for cutting by the tool. Then, the cut waste will first fall into the squeezing roller structure (51). The squeezing roller 511 rotates to match the crushing gap 524, squeezing and crushing the frozen and brittle gate position in the fallen waste, and separating it from the unfrozen soft rubber material head connected to it, so that the waste with crystal water or ice crystals is separated from the soft rubber material head. Then, when the waste moves to the discharge outlet, the crushed body The small waste materials will pass through the air flow duct 523, and the suction force generated at the suction port of the suction box 521 will suck the waste materials crushed by the squeezing roller 511 into the drying chamber. When the push switch 23 is not triggered, the two air flow ducts 523 work separately, one for letting in dry hot air flow, and the other for sucking out hot air flow. The hot air flow will take away moisture. At the same time, the electromagnet of the blocking door 524 will be powered off after a certain period of drying, and the blocking door 524 will open under the action of gravity. The dried waste materials enter the position of the crushing knife structure 6 to wait for mixing with the crushed material head. Finally, the remaining waste materials are crushed by the crushing knife and collected in the recycling box 7.

[0030] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

Claims

1. An injection gate shearing device for automotive injection molding trims, characterized by: It comprises an equipment support (1), a freezing structure (2) and a clamp (3), wherein a bottom plate (4) is provided on the equipment support (1), the freezing structure (2) is fixedly mounted on the bottom plate (41), and the clamp (3) is fixedly mounted on the bottom plate (4); The equipment bracket (1) comprises a base frame (11) and a downward pressing bracket (12), wherein the downward pressing bracket (12) is arranged above the base frame (11); The freezing structure (2) comprises a mounting rod (21) and an air jet rod (22), wherein the mounting rod (21) is mounted on the bottom plate (4), and the air jet rod (22) is mounted on the mounting rod (21), and a push switch (23) is provided on the top of the mounting rod (21); The clamp (3) is arranged below the air injection rod (22); The bottom plate (4) is provided with a material drop opening (41), a recovery box (7) is provided below the material drop opening (41), and an extrusion crushing structure (5) is provided in the recovery box (7); The extrusion crushing structure (5) comprises an extrusion roller structure (51) and a side suction structure (52), wherein the extrusion roller structure (51) crushes the gate waste by extrusion, and the side suction structure (52) recovers and dries the crushed waste by suction; A crushing knife structure (6) is provided below the extrusion crushing structure (5), wherein the crushing knife structure (6) comprises a crushing knife (61), and the crushing knife (61) is used to cut and crush the waste.

2. The injection gate shearing device for automotive injection molding trim according to claim 1, characterized in that: The base frame (11) comprises an electrical box (111) and a support frame (112), wherein the electrical box (111) is mounted on the top of the support frame (112).

3. The injection gate shearing device for automotive injection molding trim according to claim 2, characterized in that: The lower pressing bracket (12) includes a cylinder (121), a support column (122) and a lower pressing plate (123), wherein the cylinder (121) is mounted on a top plate (124), the support column (122) is provided with four parts symmetrically mounted at four corners and its bottom is fixedly mounted on the base frame (11), the top of the support column (122) is fixedly connected to the top plate (124), the lower pressing plate (123) is mounted on the output shaft of the cylinder (121), and the lower pressing plate (123) is used to install a tool for shearing the gate.

4. The injection gate shearing device for automotive injection molding trim according to claim 1, characterized in that: A refrigerated airflow pipeline is provided inside the mounting rod (21), and the refrigerated airflow pipeline is communicated with the air jet rod (22).

5. The injection gate shearing device for automotive injection molding trim according to claim 4, characterized in that: The lower surface of the air injection rod (22) is provided with an air injection hole, and the position of the air injection hole corresponds to the gate position of the decorative strip.

6. The injection gate shearing device for automotive injection molding trim according to claim 1, characterized in that: A baffle (411) is provided on the side of the blanking opening (41).

7. The injection gate shearing device for automotive injection molding trim according to claim 6, characterized in that: The squeezing roller structure (51) comprises a squeezing roller (511) and a squeezing wall (512). Both ends of the squeezing roller (511) are rotatably mounted on the recycling box (7). The squeezing wall (512) is fixedly mounted on the side wall of the recycling box (7). The squeezing roller (511) is provided with squeezing teeth (513). A crushing gap (524) that decreases evenly from top to bottom is provided between the squeezing roller (511) and the squeezing wall (512). A motor (515) is provided at the end of the squeezing roller (511).

8. The injection gate shearing device for automotive injection molding trim according to claim 1, characterized in that: The side suction structure (52) includes a suction box (521), a rolling dial (522), an airflow duct (523) and a blocking door (524). The suction box (521) is fixedly installed in the recycling box (7). Both ends of the rolling dial (522) are rotatably installed in the suction box (521). The airflow duct (523) includes two and both pass through the recycling box (7) and are connected to the drying chamber where the rolling dial (522) is located. A blanking channel is provided below the drying chamber. The blocking door (524) is installed below the blanking channel. The front end of the blocking door (524) is rotatably installed on the suction box (521). The rear end of the blocking door (524) is provided with an electromagnet, which can be adsorbed on the suction box (521). The end of the rolling dial (522) is provided with a motor 2 (525).

9. The injection gate shearing device for automotive injection molding trim according to claim 1, characterized in that: The crushing blade structure (6) further comprises a rotating shaft (62) and a third motor (63). The crushing blade (61) comprises a plurality of pieces and is evenly arranged on the rotating shaft (62). The end of the rotating shaft (62) is connected to the third motor (63).

10. The injection gate shearing device for automotive injection molding trim according to claim 1, characterized in that: A filter is provided in the recovery box (7), and the filter is located below the crushing knife structure (6).

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