Extrusion molding device for automobile sealing strip production

Abstract

The invention discloses an extrusion molding device for automobile sealing strip production, and relates to the technical field of plastic molding.The extrusion molding device comprises an operation box, a connecting frame is fixedly connected to the operation box, a heating cylinder is fixedly connected between the operation box and the connecting frame, an opening is formed in one side of the heating cylinder, and a molding die is installed at the end, away from the connecting frame, of the heating cylinder through a hoop; the hoop is fixedly connected with the operation box, a spiral shaft is rotationally connected into the heating cylinder, and a control button on the operation box is controlled to control the spiral shaft to rotate. Automatic switching between an extrusion molding mode and a cleaning mode can be achieved by controlling the electromagnetic ring to be powered on and powered off, the spiral shaft drives the spiral block to move leftwards, residual raw materials in the heating cylinder and on the spiral shaft can be pushed out leftwards together, the internal residual raw materials can be rapidly cleaned without disassembling the spiral shaft, and the working efficiency is improved. The problems that after the device is closed, residual raw materials are cooled and solidified to form a hard layer, follow-up raw material conveying is blocked, and extrusion pressure fluctuation or flow instability is caused are solved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic molding, in particular to an extrusion molding device for producing automobile sealing strips. Background Art

[0002] The extrusion molding process for automotive sealing strips heats and melts recycled plastic waste (such as PET, PP, PVC, etc.) through an extruder, and then molds it into the target shape through a mold. Its core equipment includes an extruder, mold, cooling system, and traction and cutting device. It has the advantages of efficient production, controllable costs, and continuous operation, while reducing the consumption of virgin materials and resource waste.

[0003] In the extrusion molding process of automotive sealing strips, the spiral shaft (such as single / twin-screw extruders) is a core component responsible for melting and plasticizing the material and conveying it to the mold for molding. However, when changing raw materials, temporarily stopping production or performing equipment maintenance, if the residual material inside is not cleaned in time, it is easy to form a hard layer on the surface of the screw, barrel or mold due to cooling and solidification, resulting in subsequent obstruction of raw material transportation and causing problems such as extrusion pressure fluctuations or unstable flow. The removal of such residues usually requires disassembling the spiral shaft inside the equipment for physical cleaning, which is time-consuming and cumbersome, directly affecting production efficiency and equipment maintenance costs. Summary of the Invention

[0004] In order to overcome the disadvantage that residual materials inside an extruder are difficult to clean, the present invention provides an extrusion molding device for producing automobile sealing strips.

[0005] An extrusion molding device for producing automobile sealing strips includes an operation box, a connecting frame fixedly connected to the operation box, a heating cylinder fixedly connected between the operation box and the connecting frame, an opening provided on one side of the heating cylinder, an end of the heating cylinder away from the connecting frame is installed with a molding die through a clamp, the clamp is fixedly connected to the operation box, a spiral shaft is connected for rotation inside the heating cylinder, a control button on the operation box is manipulated to control the rotation of the spiral shaft, a spiral block is provided on the spiral shaft, the spiral shaft and the spiral block form a screw nut structure, an electromagnetic ring is fixedly connected to the connecting frame, a first telescopic frame symmetrically distributed along the spiral block is fixedly connected to the spiral block, a slide groove symmetrically distributed along the heating cylinder is opened on the inner wall of the heating cylinder, the slide groove extends to the electromagnetic ring and the connecting frame, a magnetic block is provided at the telescopic end of the first telescopic frame, the magnetic block is inserted into the slide groove when it moves outward, and when power is turned on, the electromagnetic ring and the magnetic block cooperate through magnetic force.

[0006] In a preferred embodiment of the present invention, the spiral block is provided with a spiral groove that matches the trajectory of the spiral shaft blades, and the spiral block is slidably connected to the spiral shaft blades through the spiral groove.

[0007] In a preferred embodiment of the present invention, the magnetic block is rotatably connected to the telescopic end of the first telescopic frame.

[0008] In a preferred embodiment of the present invention, the electromagnetic ring and the magnetic block cooperate through repulsive magnetic forces.

[0009] In a preferred embodiment of the present invention, a retaining frame corresponding to the slide groove is further included. The retaining frame is slidably connected to the side of the heating tube close to the corresponding slide groove. The retaining frame is used to block the corresponding slide groove. Tension springs symmetrically distributed along the retaining frame are fixed between the retaining frame and the heating tube.

[0010] In a preferred embodiment of the present invention, a baffle is further included, which is slidably connected to a side of the heating cylinder close to the opening.

[0011] In a preferred embodiment of the present invention, a second telescopic frame is further included, which is fixedly connected to the spiral block. A wedge-shaped surface is provided on one side of the telescopic portion of the second telescopic frame, and a limiting ridge is provided on the baffle. The second telescopic frame pushes the baffle to slide through the limiting ridge, and the bottom surface of the baffle close to the limiting ridge is provided as an arc surface, and the telescopic portion of the second telescopic frame is extruded and fitted with the arc surface.

[0012] In a preferred embodiment of the present invention, the width of the telescopic portion of the second telescopic frame is greater than the width of the sliding groove.

[0013] In a preferred embodiment of the present invention, a rubber retaining ring is further included, and the rubber retaining ring is fixedly connected to the spiral block.

[0014] In a preferred embodiment of the present invention, the thickness of the rubber retaining ring gradually increases from one side to the other side.

[0015] Compared with the prior art, the present invention has the following advantages: the present invention can realize automatic switching between the extrusion molding mode and the cleaning mode by controlling the power on and off of the electromagnetic ring, and the spiral block is driven to move to the left by the spiral shaft, so that the residual raw materials in the heating cylinder and on the spiral shaft can be pushed to the left together, and the internal residual raw materials can be quickly cleaned without disassembling the spiral shaft, avoiding the residual raw materials cooling and solidifying to form a hard layer after closing the device, which leads to obstruction of subsequent raw material transportation and causes problems such as extrusion pressure fluctuations or unstable flow.

[0016] During the extrusion molding process, the present invention blocks the chute by the blocking frame to prevent the sealing strip production raw materials from blocking the chute. During the cleaning process, the blocking frame is automatically squeezed open by the magnetic block, which does not affect the magnetic block from being stuck in the chute.

[0017] The present invention cooperates with the second telescopic frame and the baffle so that when the cleaning mode is switched, the second telescopic frame can drive the baffle to automatically close the feed opening to prevent new materials from entering the heating cylinder through the opening during cleaning, thereby avoiding cleaning failure, and automatically opening the feed opening when cleaning is completed.

[0018] The present invention utilizes the elasticity of the rubber retaining ring. When the spiral block completely pushes the residual material to the left, the rubber retaining ring expands outward, thereby blocking the pushed material on the left side of the spiral block, preventing the pushed material from invading the slots and parts of the spiral block to the right and becoming difficult to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a three-dimensional structural diagram of the connecting frame, heating cylinder, forming mold and other components of the present invention.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the spiral shaft, spiral block, electromagnetic ring and other components of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the connecting frame, heating tube and electromagnetic ring of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the spiral shaft, spiral block, first telescopic frame and magnetic block of the present invention.

[0024] Figure 6 Schematic diagram of the three-dimensional structure of the spiral block of the present invention.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the components such as the magnetic block, the retaining frame and the tension spring of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the components such as the heating cylinder, spiral block and retaining frame of the present invention.

[0027] Figure 9 It is a sectional view of the three-dimensional structure of the baffle of the present invention.

[0028] Figure 10 It is a schematic diagram of the three-dimensional structure of the spiral block and the second telescopic frame of the present invention.

[0029] Figure 11 It is a schematic diagram of the three-dimensional structure of the spiral block and the rubber retaining ring of the present invention.

[0030] Figure 12 It is a schematic diagram of the three-dimensional structure of the rubber retaining ring of the present invention.

[0031] Among them, the above-mentioned drawings include the following figure marks: 1. operating box, 2. connecting frame, 3. heating cylinder, 4. forming mold, 5. clamp, 6. spiral shaft, 7. spiral block, 8. electromagnetic ring, 9. first telescopic frame, 901, slide groove, 902, spiral groove, 10. magnetic block, 11. baffle, 12. tension spring, 13. baffle, 131, arc surface, 14. limit ridge, 15. second telescopic frame, 16. rubber retaining ring. DETAILED DESCRIPTION

[0032] First of all, it should be noted that in the various embodiments described, identical components are provided with identical reference numerals or identical component names, wherein the disclosure contained throughout the entire description can be transferred to the same components having the same reference numerals or identical component names. Positional designations selected in the description, such as top, bottom, lateral, etc., also refer to the directly described and illustrated figures and are transferred to the new position in the event of a change in position.

[0033] Example 1: An extrusion molding device for producing automobile sealing strips, combined with the attached Figure 1 To the attached Figure 6 , including an operation box 1, on which various control buttons are set, a connecting frame 2 is fixedly connected to the right side of the top of the operation box 1, a heating cylinder 3 is fixedly connected to the left side of the connecting frame 2, and the left side of the heating cylinder 3 is fixedly connected to the operation box 1. The heating cylinder 3 is used to provide extrusion temperature for the raw materials for the production of the sealing strip. An opening is provided on the right side of the top of the heating cylinder 3 for adding raw materials for the production of the sealing strip. All parts in the heating cylinder 3 are made of heat-resistant material. A forming mold 4 for forming the sealing strip is installed at the left end of the heating cylinder 3 through a clamp 5. The clamp 5 is fixedly connected to the operation box 1. A spiral shaft 6 is rotatably connected in the heating cylinder 3. The control buttons on the operation box 1 are manipulated to control the rotation of the spiral shaft 6. A spiral block 7 is provided on the right side of the spiral shaft 6. The spiral block 7 has a hole connected to the spiral The spiral groove 902 matches the blade trajectory of the shaft 6, and the spiral block 7 is slidingly connected to the blade of the spiral shaft 6 through the spiral groove 902, so that the spiral blade of the spiral shaft 6 and the spiral block 7 constitute a screw nut structure. An electromagnetic ring 8 is fixed to the left side of the connecting frame 2, and two elastic first telescopic frames 9 are fixed to the spiral block 7, which are symmetrically distributed along the spiral block 7. Two slide grooves 901 are opened on the inner wall of the heating tube 3, which are symmetrically distributed along the heating tube 3, and the slide grooves 901 extend to the electromagnetic ring 8 and the connecting frame 2. The telescopic end of the first telescopic frame 9 is rotatably connected to the magnetic block 10. When power is on, the electromagnetic ring 8 and the magnetic block 10 cooperate through repulsive magnetic forces. When power is off, the magnetic block 10 moves outward and is inserted into one of the slide grooves 901 respectively.

[0034] When using this device, first pour the sealing strip production raw materials from the top opening on the right side of the heating cylinder 3, then manipulate the operating box 1 to heat the heating cylinder 3 and rotate the spiral shaft 6 at the same time, thereby transferring the sealing strip production raw materials to the left and extruding them. During this extrusion molding process, the electromagnetic ring 8 is energized, and the electromagnetic ring 8 repels the magnetic block 10, causing the magnetic block 10 to embed into the spiral block 7, and the first telescopic frame 9 is compressed. In this way, the magnetic block 10 and the first telescopic frame 9 rotate synchronously with the spiral shaft 6.

[0035] After completing the extrusion molding operation, remove the clamp 5 and the molding die 4 in turn, and then cut off the power to the electromagnetic ring 8. At this time, in the process of synchronous rotation with the spiral shaft 6, the first telescopic frame 9 rebounds and drives the magnetic block 10 to pop outward to contact the inner wall of the electromagnetic ring 8. When the popped-out magnetic block 10 rotates to align with the slide groove 901, the first telescopic frame 9 further rebounds so that the magnetic block 10 is stuck in the slide groove 901. At this time, the limiting effect of the slide groove 901 makes it impossible for the magnetic block 10 to continue to rotate, thereby causing the first telescopic frame 9 to no longer continue to rotate, and then causing the spiral block 7 to no longer continue to rotate, but the spiral shaft 6 still continues to rotate relative to the spiral block 7, and will act on the spiral groove 902 of the spiral block 7 through the spiral blades thereon, causing the spiral block 7 to move to the left, thereby driving the first telescopic frame 9 to move to the left, and then driving the magnetic block 10 to move to the left along the slide groove 901.

[0036] In this way, the present invention can realize automatic switching between the extrusion molding mode and the cleaning mode by controlling the power on and off of the electromagnetic ring 8, and the spiral block 7 is driven to move to the left by the spiral shaft 6, so that the residual raw materials in the heating cylinder 3 and on the spiral shaft 6 can be pushed to the left together, and the internal residual raw materials can be quickly cleaned without disassembling the spiral shaft 6, avoiding the residual raw materials from cooling and solidifying to form a hard layer after closing the device, resulting in subsequent raw material transportation being blocked, causing problems such as extrusion pressure fluctuations or flow instability.

[0037] After cleaning, the spiral shaft 6 is controlled to reverse, so that the spiral block 7 drives the first telescopic frame 9 and the magnetic block 10 to move rightward and reset, and the forming mold 4 and the clamp 5 are reinstalled.

[0038] Example 2: Based on Example 1, Figure 7 , and also includes a baffle 11 corresponding to the slide groove 901. The baffle 11 is slidably connected to the side of the heating cylinder 3 close to the corresponding slide groove 901. During extrusion molding, the baffle 11 blocks the slide groove 901 to prevent the sealing strip production raw materials from blocking the slide groove 901. A tension spring 12 is fixed between the baffle 11 and the heating cylinder 3 and is symmetrically distributed along the baffle 11. During cleaning, when the magnetic block 10 rotates to the slide groove 901, it will automatically squeeze the baffle 11 to slide to the side of the tension spring 12, thereby not affecting the magnetic block 10 from being stuck in the slide groove 901.

[0039] Combined with attachment Figure 8 To the attached Figure 10, it also includes a baffle 13, the baffle 13 is slidably connected to the side of the heating tube 3 near the opening, the left part of the baffle 13 is provided with a limiting ridge 14, the edge of the spiral block 7 is fixedly connected to the elastic second telescopic frame 15, the second telescopic frame 15 pushes the baffle 13 to slide to the left through the limiting ridge 14, and the left side of the telescopic part of the second telescopic frame 15 is provided with a wedge-shaped surface. When the baffle 13 moves to the left and completely closes the opening of the heating tube 3, the limiting ridge 14 squeezes the wedge-shaped surface of the second telescopic frame 15, so that the second telescopic frame 15 is compressed and separated from the baffle 13, and the bottom surface of the baffle 13 near the left side is set as an arc surface 131. When the second telescopic frame 15 moves back to the right, its telescopic part is squeezed and matched with the arc surface 131. The width of the telescopic part of the second telescopic frame 15 is greater than the width of the slide groove 901, so as to prevent the second telescopic frame 15 from being stuck in the slide groove 901 when rotating.

[0040] As the spiral block 7 rotates, it drives the second telescopic frame 15 to rotate. When the magnetic block 10 is just engaged in the chute 901, the compressed second telescopic frame 15 also rotates along the inner wall of the heating tube 3 to the top side near the baffle 13. As the spiral block 7 drives the second telescopic frame 15 to move leftward, the second telescopic frame 15 first detaches from the inner wall of the heating tube 3 and extends to reset, then contacts the limit ridge 14 of the baffle 13 and pushes the baffle 13 to move leftward together until the baffle 13 completely blocks the top opening on the right side of the heating tube 3, preventing new material from entering the heating tube 3 through the opening during cleaning, thereby avoiding cleaning failure. As the second telescopic frame 15 continues to move leftward, the wedge-shaped surface of the second telescopic frame 15 is squeezed by the limit ridge 14 and moves and contracts toward the side near the spiral block 7 until the second telescopic frame 15 detaches from the baffle 13.

[0041] When the spiral block 7 moves to the right and resets, it drives the second telescopic frame 15 to move to the right synchronously. During the rightward movement, when the second telescopic frame 15 in the compressed state moves to the arc surface 131 of the baffle 13, it resets upward, thereby squeezing the baffle 13 to the right, so that the telescopic part of the second telescopic frame 15 contacts the left side of the baffle 13. During the continued rightward movement, the second telescopic frame 15 can push the baffle 13 to the right and reset, so that the opening of the heating cylinder 3 is automatically opened for feeding.

[0042] Example 3: Based on Example 2, Figure 11 To the attached Figure 12 , also includes a rubber retaining ring 16, the rubber retaining ring 16 is fixed to the left side of the spiral block 7, and the thickness of the rubber retaining ring 16 gradually becomes thicker from the right side to the left side.

[0043] When the spiral block 7 pushes the material to the left, the material is blocked on the left side of the spiral block 7. The slots of the spiral block 7 and the parts in the slots are all arranged on the right side. Therefore, the material usually does not invade the slots and the parts in the slots. However, when the spiral block 7 is removed and separated from the inner wall of the heating cylinder 3, the blocking effect is lost and the material on the left side of the spiral block 7 may invade to the right. To solve this problem, the present invention provides a rubber retaining ring 16 on the left side to block it. Specifically: Since the rubber retaining ring 16 is thick on the left side and thin on the right side, when the rubber retaining ring 16 enters the heating cylinder 3, its thick side will be adaptively compressed, and the left and right movement of the spiral block 7 will drive the rubber retaining ring 16 to move synchronously to the left. When the spiral block 7 completely pushes the residual material to the left, the thick side of the rubber retaining ring 16 will adaptively expand outward at the moment it separates from the heating cylinder 3, thereby blocking the pushed-out material on the left side of the spiral block 7, preventing the pushed-out material from invading the various slots and parts of the spiral block 7 to the right and becoming difficult to clean.

[0044] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge of those skilled in the art without departing from the spirit of the present invention.

Claims

1. An extrusion molding device for producing automobile sealing strips, comprising an operating box (1), a connecting frame (2) fixedly connected to the operating box (1), a heating cylinder (3) fixedly connected between the operating box (1) and the connecting frame (2), an opening being provided on one side of the heating cylinder (3), a molding die (4) being mounted on the end of the heating cylinder (3) away from the connecting frame (2) via a clamp (5), the clamp (5) being fixedly connected to the operating box (1), a spiral shaft (6) being rotatably connected in the heating cylinder (3), and a control button on the operating box (1) being operated to control the rotation of the spiral shaft (6); It is characterized in that A spiral block (7) is provided on the spiral shaft (6), and the spiral shaft (6) and the spiral block (7) form a screw nut structure. An electromagnetic ring (8) is fixedly connected to the connecting frame (2), and a first telescopic frame (9) symmetrically distributed along the spiral block (7) is fixedly connected to the spiral block (7). A sliding groove (901) symmetrically distributed along the heating cylinder (3) is opened on the inner wall of the heating cylinder (3), and the sliding groove (901) extends to the electromagnetic ring (8) and the connecting frame (2). A magnetic block (10) is provided at the telescopic end of the first telescopic frame (9), and the magnetic block (10) is inserted into the sliding groove (901) when it moves outward. When power is turned on, the electromagnetic ring (8) and the magnetic block (10) cooperate through magnetic force.

2. The extrusion molding device for producing automobile sealing strips according to claim 1, characterized in that: The spiral block (7) is provided with a spiral groove (902) that matches the trajectory of the blades of the spiral shaft (6), and the spiral block (7) is slidably connected to the blades of the spiral shaft (6) through the spiral groove (902).

3. The extrusion molding device for producing automobile sealing strips according to claim 2, characterized in that: The magnetic block (10) is rotatably connected to the telescopic end of the first telescopic frame (9).

4. The extrusion molding device for producing automobile sealing strips according to claim 3, characterized in that: The electromagnetic ring (8) and the magnetic block (10) cooperate with each other through repulsive magnetic forces.

5. The extrusion molding device for producing automobile sealing strips according to claim 4, characterized in that: The heating tube (3) further comprises a retaining frame (11) corresponding to the slide groove (901), wherein the retaining frame (11) is slidably connected to a side of the heating tube (3) close to the corresponding slide groove (901), and the retaining frame (11) is used to retain the corresponding slide groove (901). Tension springs (12) symmetrically distributed along the retaining frame (11) are fixedly connected between the retaining frame (11) and the heating tube (3).

6. The extrusion molding device for producing automobile sealing strips according to claim 5, characterized in that: It also includes a baffle (13), which is slidably connected to a side of the heating cylinder (3) close to the opening.

7. An extrusion molding device for producing automobile sealing strips according to claim 6, characterized in that: The second telescopic frame (15) is further provided with a wedge-shaped surface on one side of the telescopic portion of the second telescopic frame (15), and the baffle (13) is provided with a limit ridge (14). The second telescopic frame (15) pushes the baffle (13) to slide via the limit ridge (14). The bottom surface of the baffle (13) on the side close to the limit ridge (14) is provided with an arc surface (131), and the telescopic portion of the second telescopic frame (15) is extruded and fitted with the arc surface (131).

8. The extrusion molding device for producing automobile sealing strips according to claim 7, characterized in that: The width of the telescopic portion of the second telescopic frame (15) is greater than the width of the slide groove (901).

9. The extrusion molding device for producing automobile sealing strips according to claim 8, characterized in that: It also includes a rubber retaining ring (16), which is fixedly connected to the spiral block (7).

10. An extrusion molding device for producing automobile sealing strips according to claim 9, characterized in that: The thickness of the rubber retaining ring (16) gradually increases from one side to the other side.

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