Injection molding device for producing automobile rubber sealing ring

Abstract

The application provides an injection molding device for automobile rubber sealing ring production, which comprises a cylinder, limit single plates and end seats are arranged at two ends of the cylinder to fix the end head, an axial fastening mechanism moving along the axial direction of the cylinder is arranged at the end face of the end seat to axially clamp the cylinder, floating seats are distributed along the axial direction outside the cylinder to radially support the cylinder, second hydraulic cylinders are distributed along the circumferential direction of the cylinder on the floating seats to radially clamp the cylinder, the cylinder is fixedly installed through axial clamping, after losing the axial clamping and fixing, the cylinder restores the freedom of radial movement, then the second hydraulic cylinders on the floating seats outside are matched to adjust the position of the cylinder, eccentric driving of the cylinder is realized, the spacing between the inner wall of the cylinder and an extrusion screw rod is adjusted, then the inner wall of the cylinder is scraped by the extrusion screw rod, the inner wall of the cylinder is quickly cleaned without disassembling, the negative influence caused by material blockage is reduced, and the device has a good development prospect.

Description

Technical Field

[0001] This invention relates to the field of injection molding, specifically to an injection molding apparatus for producing automotive rubber seals. Background Technology

[0002] As a key sealing element, sealing rings are mainly used for static sealing and reciprocating motion sealing. Their core function is to prevent fluid or gas leakage. They are widely used in hydraulic and pneumatic systems and are now also widely used in the automotive field. The production of sealing rings mainly relies on injection molding and then cutting and joining.

[0003] During injection molding, if materials (such as molten plastic, granules, or impurities) remain in one place inside the equipment for too long or cannot flow smoothly, it may cause problems such as poor plasticization, decomposition, impurity accumulation, or even equipment blockage. Ultimately, this leads to a decline in product quality, resulting in black spots, bubbles, color differences, uneven density, etc. At the same time, the screw and barrel wear will increase, requiring the machine to be stopped for disassembly and cleaning of internal residues. This ultimately leads to a decrease in production efficiency and affects continuous production.

[0004] Therefore, a new type of injection molding device for producing automotive rubber seals is needed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an injection molding apparatus for producing automotive rubber seals.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An injection molding apparatus for producing automotive rubber seals includes a barrel. One end of the barrel is fixedly connected to a conical extrusion head by fastening bolts. Limiting plates and end seats are respectively provided at both ends of the barrel for fixing the end. The limiting plate is located on the side closer to the extrusion head and is sleeved on the outside of the extrusion head, where it is sleeved at the conical section of the extrusion head. The other side of the barrel is connected to an end seat. An axial clamping mechanism that moves along the barrel axis is provided at the end face of the end seat to clamp the barrel axially. A drive motor is provided at the other end of the end seat. The output end of the drive motor is reduced in speed by a reducer and then connected to the extrusion screw inside the barrel. A feed hopper is located at the top of the end of the barrel near the end seat and connects to the inside of the barrel. Floating seats are distributed axially on the outside of the barrel to provide radial support for the barrel. Second hydraulic cylinders are distributed circumferentially on the floating seats to provide radial clamping for the barrel.

[0008] As a further aspect of the present invention: the barrel includes a tube, a connecting flange, and a guide ring. The tube is a round tube open at both ends, with a connecting flange and a guide ring welded to each end. The tube is fastened to the extruder head by bolts through the connecting flange, and the other end is in contact with the axial fastening mechanism through the guide ring. A semi-protruding release spring is provided on the end face of the extruder head that does not contact the connecting flange. A recess is provided on the end face of the extruder head, and a release spring is fixed in the recess. The other end of the release spring abuts against the limiting plate. When the release spring is compressed, it is completely hidden in the recess. The limiting plate is sleeved on the conical section of the extruder head.

[0009] As a further aspect of the present invention: a guide groove is recessed on the circumferential surface of the cylinder at a position corresponding to the second hydraulic cylinder of the floating seat, and the length of the guide groove is consistent with the compression length of the release spring.

[0010] As a further aspect of the present invention: the end of the second hydraulic cylinder that contacts the cylinder is connected to a roller whose end protrudes into the guide groove, and the roller rolls along the axial direction of the cylinder.

[0011] As a further aspect of the present invention: the floating seat includes a base, a connecting ring and a second hydraulic cylinder. The base is composed of a semi-circular structure and is connected into a ring by fixing bolts, which is sleeved on the outside of the tube. Connecting rings facing the center are distributed at equal angles on the annular structure of the base. The second hydraulic cylinder is hinged on the connecting ring and swings at an angle along the plane of the annular structure of the base.

[0012] As a further aspect of the present invention: a pressure-bearing cylinder facing the center is provided at the bottom of the annular part of the base. Rollers are connected to the pressure-bearing cylinder for contact with the cylinder tube. The pressure-bearing cylinder is vertically supported by an elastic structure or compressed gas. When the cylinder tube and the compressed pressure-bearing cylinder are in a balanced state, the center position of the cylinder tube is lower than the height of the center of the annular part of the base.

[0013] As a further aspect of the present invention: the concave arc surface of the roller connected to the pressure cylinder has a curvature greater than that of the cylinder's circumference.

[0014] As a further aspect of the present invention: a distance sensor is embedded in the pressure cylinder to sense the real-time compression distance of the pressure cylinder.

[0015] As a further embodiment of the present invention: the axial fastening mechanism includes an extrusion member and a first hydraulic cylinder. The extrusion member is annularly distributed and hinged on the end seat. Driven by the first hydraulic cylinder, it is aggregated into an annular structure or opened. The inner wall of the annular structure formed by the extrusion member is inclined at the connection with the end face, and the corresponding part on the guide ring of the barrel is inclined at the same angle.

[0016] As a further aspect of the present invention: the floating seats are arranged in equal proportions along the axial direction of the barrel after being connected to the extrusion head.

[0017] Beneficial effects

[0018] 1. The barrel of the present invention is fixedly installed by axial clamping. After the axial clamping is lost, the barrel regains the freedom of radial movement. In conjunction with the second hydraulic cylinder on the outer floating seat to adjust the position of the barrel, the barrel is eccentrically driven, and the distance between the inner wall of the barrel and the extrusion screw is adjusted. This allows the inner wall of the barrel to be scraped by the extrusion screw, achieving rapid cleaning of the inner wall of the barrel without disassembly and reducing the negative impact of material blockage.

[0019] 2. In this invention, a partially protruding release spring is provided on the end face of the extruder head that does not contact the connecting flange. A recessed hole is provided on the end face of the extruder head, and the release spring is fixed in the recessed hole. The other end of the release spring abuts against the limiting plate. When the release spring is compressed, it is completely hidden in the recessed hole. The limiting plate is sleeved on the conical section of the extruder head. Through the setting of the release spring, after the barrel loses the clamping and limiting of the axial fastening mechanism, the end in contact with the limiting plate will be pushed away from the limiting plate under the action of the release spring. The diameter of the nested part with the limiting plate is reduced, thereby realizing the limiting effect of the limiting plate on the barrel, thereby restoring the degree of freedom of eccentric movement, thereby realizing the adjustment of the distance between various parts of the inner wall and the inner extrusion screw, and thus realizing the cleaning effect of the inner wall of the barrel.

[0020] 3. The bottom of the annular portion of the base of the present invention is provided with a pressure-bearing cylinder facing the center. Rollers are connected to the pressure-bearing cylinder for contact with the barrel. The pressure-bearing cylinder provides vertical support through an elastic structure or compressed gas. When the barrel and the compressed pressure-bearing cylinder are in a balanced state, the center position of the barrel is lower than the center of the annular portion of the base. The pressure-bearing cylinder is used to support the weight of the barrel and the extrusion head, thereby reducing the driving force required for the centrifugal motion of the barrel, reducing the load on the second hydraulic cylinder on the floating seat, and improving the adjustment accuracy. The balance height of the pressure-bearing cylinder balances the load state between the second hydraulic cylinders, avoiding the situation of partial overload and partial no-load. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 This is an exploded view of the structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the barrel structure of the present invention.

[0024] Figure 4 This is a schematic diagram of the axial fastening mechanism of the present invention.

[0025] Figure 5 This is a schematic diagram of the extruder head structure of the present invention.

[0026] Figure 6 This is a schematic diagram of the floating seat structure of the present invention.

[0027] Figure 7 For the present invention Figure 6 An enlarged schematic diagram of the structure at point A.

[0028] Figure 8 This is a schematic diagram of the installation of the second hydraulic cylinder of the present invention.

[0029] Figure 1-8 Components: 1. Barrel; 101. Tube; 102. Guide groove; 103. Connecting flange; 104. Guide ring; 105. Feed inlet; 2. Extrusion head; 3. Release spring; 4. Limiting plate; 5. End seat; 6. Axial fastening mechanism; 601. Extrusion part; 602. First hydraulic cylinder; 7. Reducer; 8. Drive motor; 9. Feed hopper; 10. Extrusion screw; 11. Floating seat; 1101. Base; 1102. Pressure cylinder; 1103. Connecting ring; 1104. Second hydraulic cylinder; 1105. Roller. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-8 , Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is an exploded view of the structure of the present invention; Figure 3 This is a schematic diagram of the barrel structure of the present invention; Figure 4 This is a schematic diagram of the axial fastening mechanism of the present invention; Figure 5 This is a schematic diagram of the extruder head structure of the present invention; Figure 6 This is a schematic diagram of the floating seat structure of the present invention; Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point A; Figure 8 This is a schematic diagram of the installation of the second hydraulic cylinder of the present invention.

[0032] This embodiment provides an injection molding apparatus for producing automotive rubber seals, including a barrel 1. One end of the barrel 1 is fixedly connected to a conical extrusion head 2 by fastening bolts. Limiting plates 4 and end seats 5 are respectively provided at both ends of the barrel 1 to fix the end. The limiting plate 4 is located near the extrusion head 2 and is sleeved on the outside of the extrusion head 2, at the point where it is sleeved, which is the conical section of the extrusion head 2. The other side of the barrel 1 is connected to the end seat 5, and the end face of the end seat 5 is provided with a groove along the axis of the barrel 1. The axial fastening mechanism 6 clamps the barrel 1 axially. The other end of the end seat 5 is equipped with a drive motor 8. The output end of the drive motor 8 is reduced by the reducer 7 and then connected to the extrusion screw 10 inside the barrel 1. The top of the end of the barrel 1 near the end seat 5 has a feed hopper 9 that connects to the inside of the barrel 1. Floating seats 11 are distributed axially on the outside of the barrel 1 to provide radial support for the barrel 1. Second hydraulic cylinders 1104 are distributed circumferentially on the floating seats 11 to provide radial clamping for the barrel 1.

[0033] The barrel 1 is fixed in place by axial clamping. After the axial clamping is removed, the barrel 1 regains the freedom of radial movement. In conjunction with the second hydraulic cylinder 1104 on the outer floating seat 11 to adjust the position of the barrel 1, the barrel 1 is eccentrically driven, and the distance between the inner wall of the barrel 1 and the extrusion screw 10 is adjusted. This allows the inner wall of the barrel 1 to be scraped by the extrusion screw 10, achieving rapid cleaning of the inner wall of the barrel 1 without disassembly, and reducing the negative impact of material blockage.

[0034] The floating seats 11 are evenly distributed along the center of gravity of the barrel 1 after it is connected to the extrusion head 2 in the axial direction of the barrel 1, so as to balance the force on each floating seat 11 on the outside of the barrel 1, improve the consistency of the barrel 1 structure in the axial direction when the barrel 1 is driven by the floating seats 11 to perform eccentric motion, and prevent angle changes.

[0035] The barrel 1 includes a tube 101, a connecting flange 103, and a guide ring 104. The tube 101 is a round tube open at both ends, with the connecting flange 103 and the guide ring 104 welded to each end. The tube 101 is fastened to the extruder head 2 by bolts through the connecting flange 103, and the other end is in contact with the axial fastening mechanism 6 through the guide ring 104. On the end face of the extruder head 2 that does not contact the connecting flange 103, there is a semi-protruding release spring 3. A concave hole is provided on the end face of the extruder head 2, and the release spring 3 is fixed in the concave hole. The other end of the release spring 3 is connected to the limiting plate 4. When the release spring 3 is compressed, it is completely hidden in the concave hole. The limiting plate 4 is sleeved on the conical section of the extruder head 2. With the setting of the release spring 3, after the barrel 1 loses the clamping and limiting of the axial fastening mechanism 6, the end in contact with the limiting plate 4 will be pushed away from the limiting plate 4 under the action of the release spring 3. The diameter of the nested part with the limiting plate 4 is reduced, thereby releasing the limiting effect of the limiting plate 4 on the barrel 1, thereby restoring the degree of freedom of eccentric movement, thereby realizing the adjustment of the distance between various parts of the inner wall and the inner extrusion screw 10, and thus realizing the cleaning and scraping effect on the inner wall of the barrel 1.

[0036] Specifically, a guide groove 102 is recessed on the circumferential surface of the tube 101 at a position corresponding to the second hydraulic cylinder 1104 of the floating seat 11, and is distributed axially along the tube 101. The length of the guide groove 102 is the same as the compression length of the release spring 3. One end of the second hydraulic cylinder 1104 that contacts the tube 101 is connected to a roller 1105 whose end extends into the guide groove 102. The roller 1105 rolls axially along the tube 101 to reduce the resistance of the tube 101 in axial movement within the base 1101. At the same time, the guide groove 102 provides circumferential limitation for the movement of the tube 101, preventing the tube 101 from being damaged by gravity or friction during axial movement. A circumferential angular flip occurs, and the floating seat 11 includes a base 1101, a connecting ring 1103, and a second hydraulic cylinder 1104. The base 1101 is composed of a semi-circular structure, which is connected into a ring by fixing bolts and sleeved on the outside of the tube 101. The connecting rings 1103 are evenly distributed on the annular structure of the base 1101 and face the center. The second hydraulic cylinder 1104 is hinged on the connecting ring 1103. The second hydraulic cylinder 1104 swings at an angle along the plane of the annular structure of the base 1101. Then, through the contraction and extension of each second hydraulic cylinder 1104 and the small-angle swing, the eccentric drive of the tube 101 clamped in the middle is realized.

[0037] Furthermore, a pressure-bearing cylinder 1102 facing the center is provided at the bottom of the annular part of the base 1101. Rollers 1105 are connected to the pressure-bearing cylinder 1102 for contact with the cylinder 101. The pressure-bearing cylinder 1102 is vertically supported by an elastic structure or compressed gas. When the cylinder 101 and the compressed pressure-bearing cylinder 1102 are in a balanced state, the center position of the cylinder 101 is lower than the height of the center of the annular part of the base 1101.

[0038] The pressure cylinder 1102 is used to support the main weight of the barrel 1 and the extruder head 2, thereby reducing the driving force required for the centrifugal motion of the barrel 1, reducing the load on the second hydraulic cylinder 1104 on the floating seat 11, and improving the adjustment accuracy. The balance height of the pressure cylinder 1102 balances the load state between the second hydraulic cylinders 1104, avoiding the situation of partial overload and partial no-load.

[0039] Furthermore, the concave arc surface of the roller 1105 connected to the pressure cylinder 1102 has a greater curvature than that of the cylinder 101. This arc surface is used to guide the position of the cylinder 1 during centering and resetting, thus assisting in the centering and resetting of the cylinder 1. The pressure cylinder 1102 is also embedded with a distance sensor to sense the real-time compression distance of the pressure cylinder 1102, thereby detecting the height of the cylinder 1 on the pressure cylinder 1102 and improving the accuracy of the cylinder 101 after centering and resetting.

[0040] The axial fastening mechanism 6 includes an extrusion member 601 and a first hydraulic cylinder 602. The extrusion member 601 is annularly distributed and hinged on the end seat 5. Driven by the first hydraulic cylinder 602, it is either assembled into an annular structure or opened. The inner wall of the annular structure formed by the extrusion member 601 is inclined at the connection with the end face. The corresponding part of the guide ring 104 of the barrel 1 is inclined at the same angle.

[0041] By aggregating the extruder 601 in the open state, the guide ring 104 at the movable end of the barrel 1 is guided and reset, driving the guide ring 104 to the center position and pushing the barrel 1 as a whole towards the limiting plate 4. By using the limiting plate 4 to guide the extruder 2 during movement, the positioning and clamping of both ends of the barrel 1 are finally achieved.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection molding apparatus for producing automotive rubber seals, characterized in that, include: A barrel (1) is provided with a tapered extrusion head (2) fixedly connected to one end by fastening bolts. Limiting plates (4) and end seats (5) are respectively provided at both ends of the barrel (1) for fixing the end. The limiting plate (4) is located on the side closer to the extrusion head (2). The limiting plate (4) is sleeved on the outside of the extrusion head (2). The sleeved part is the tapered structure section of the extrusion head (2). The other side of the barrel (1) is connected to the end seat (5). The other end of the end seat (5) is provided with a drive motor (8). The output end of the drive motor (8) is decelerated by a reducer (7) and then connected to the extrusion screw (10) inside the barrel (1). An axial fastening mechanism (6) is provided at the end face of the end seat (5) to clamp the barrel (1) axially. Feed hopper (9), the top of the end of the machine barrel (1) near the end seat (5) has a feed hopper (9) that connects to the inside of the machine barrel (1); A floating seat (11) is provided on the outer side of the machine barrel (1) along the axial direction to provide radial support for the machine barrel (1). A second hydraulic cylinder (1104) is provided on the floating seat (11) along the circumference of the machine barrel (1) to provide radial clamping for the machine barrel (1).

2. The injection molding apparatus for producing automotive rubber seals according to claim 1, characterized in that: The barrel (1) includes a tube (101), a connecting flange (103) and a guide ring (104). The tube (101) is a round tube with open ends. The connecting flange (103) and the guide ring (104) are welded to the two ends respectively. The tube (101) is fastened to the extruder (2) by the connecting flange (103) and the other end is against the axial fastening mechanism (6) by the guide ring (104). The extruder (2) has a semi-protruding release spring (3) on the end face that does not contact the connecting flange (103). The end face of the extruder (2) is provided with a concave hole, and the release spring (3) is fixed in the concave hole. The other end of the release spring (3) is against the limiting plate (4). When the release spring (3) is compressed, it is completely hidden in the concave hole. The limiting plate (4) is sleeved on the conical section of the extruder (2).

3. The injection molding apparatus for producing automotive rubber seals according to claim 2, characterized in that: On the circumferential surface of the tube (101), at the position corresponding to the second hydraulic cylinder (1104) of the floating seat (11), there is a guide groove (102) distributed along the axial direction of the tube (101), and the length of the guide groove (102) is consistent with the compression length of the release spring (3).

4. The injection molding apparatus for producing automotive rubber seals according to claim 3, characterized in that: The second hydraulic cylinder (1104) is connected to a roller (1105) whose end protrudes into the guide groove (102) at one end, and the roller (1105) rolls axially along the cylinder (101).

5. The injection molding apparatus for producing automotive rubber seals according to claim 2, characterized in that: The floating seat (11) includes a base (1101), a connecting ring (1103) and a second hydraulic cylinder (1104). The base (1101) is composed of a semi-circular structure and is connected into a ring by fixing bolts. It is sleeved on the outside of the tube (101). The connecting rings (1103) facing the center are evenly distributed on the annular structure of the base (1101). The second hydraulic cylinder (1104) is hinged on the connecting ring (1103). The second hydraulic cylinder (1104) swings at an angle along the plane of the annular structure of the base (1101).

6. The injection molding apparatus for producing automotive rubber seals according to claim 5, characterized in that: The bottom of the annular portion of the base (1101) is provided with a pressure-bearing cylinder (1102) facing the center. Rollers (1105) are connected to the pressure-bearing cylinder (1102) for contact with the cylinder tube (101). The pressure-bearing cylinder (1102) is vertically supported by an elastic structure or compressed gas. When the cylinder tube (101) and the compressed pressure-bearing cylinder (1102) are in a balanced state, the center position of the cylinder tube (101) is lower than the height of the center of the annular portion of the base (1101).

7. The injection molding apparatus for producing automotive rubber seals according to claim 6, characterized in that: The concave arc surface of the roller (1105) connected to the pressure cylinder (1102) has a greater arc than that of the cylinder (101).

8. The injection molding apparatus for producing automotive rubber seals according to claim 6, characterized in that: The pressure-bearing cylinder (1102) is equipped with a distance sensor to sense the real-time compression distance of the pressure-bearing cylinder (1102).

9. The injection molding apparatus for producing automotive rubber seals according to claim 2, characterized in that: The pressure-bearing cylinder (1102) is equipped with a distance sensor to sense the real-time compression distance of the pressure-bearing cylinder (1102).

10. The injection molding apparatus for producing automotive rubber seals according to claim 1, characterized in that: The floating seat (11) is arranged in equal parts along the axial direction of the barrel (1) after it is connected to the extruder (2).

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