A double cone rubber extruder

Abstract

This utility model relates to the field of extruder technology, specifically to a double cone rubber extruder, including a double cone extruder body and an extrusion cylinder disposed on the double cone extruder body. An extrusion die head is fixedly installed at one end of the extrusion cylinder, and a feed hopper is fixedly installed at the upper end of the extrusion cylinder. A support base is provided at the lower end of the extrusion cylinder and the extrusion die head. A feed rate control component is provided inside the feed hopper. By driving a telescopic hydraulic cylinder to drive a spur gear, a gear, and a rotating rod in linkage, the angle of four opening and closing guide plates is adjusted synchronously, changing the degree of opening and closing of the inner wall channel of the feed hopper, thereby accurately controlling the feed rate of rubber particles, avoiding excessive or insufficient feed, effectively preventing excessive rubber raw material in the extrusion cylinder, and preventing some raw material from failing to melt in time, thus affecting the extrusion quality, such as unmelted particles and poor uniformity of the extrudate.

Description

Technical Field

[0001] This utility model relates to the field of extruder technology, specifically to a double cone rubber extruder. Background Technology

[0002] Rubber products such as tires, seals, hoses, and belts are widely used in the automotive, construction, and aerospace industries. The demands for processing efficiency, product precision, and performance of rubber materials are constantly increasing. The development of rubber extruders has evolved from single-screw to multi-screw extruders. While single-screw extruders have a simple structure, the core feature of twin-cone rubber extruders is their twin-cone screw design. This means the screw diameter varies axially, with smaller diameters at both ends and a larger diameter in the middle, or a specific taper variation. Through proper matching of the tapers, the pressure and shear force during extrusion can be gradient-regulated, thereby optimizing plasticization and reducing material retention and overheating. This makes them particularly suitable for the continuous extrusion of highly filled and highly elastic rubbers.

[0003] In existing technology, plasticized or compounded rubber raw materials (mostly in block or granular form) are fed into the feed inlet of an extruder through a hopper. Under the action of gravity and the frictional force of the rotating screw, the rubber raw materials enter the barrel. The rotating screw pushes the material forward along the barrel, while the space of the double cone structure gradually contracts, and the material is continuously compacted, expelling air and moisture to form a dense agglomerate. As the material continues to move forward, the gradient pressure and shear force generated by the double cone structure continue to increase. Combined with the heat from the external heating device of the barrel, the rubber material gradually softens and plasticizes, eventually forming a uniform molten rubber compound, which is then extruded into a specific shape (such as a rubber tube or strip) through a die at the die head.

[0004] The device currently has some defects: when too much rubber raw material is added to the feed hopper, a large amount of raw material will flow into the extrusion barrel of the double cone extruder. Since the plasticizing and melting capacity of the extrusion barrel is limited, after too much rubber granules enter, some raw material cannot be fully heated, squeezed and sheared, and it is difficult to completely melt and plasticize. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a double cone rubber extruder, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a double cone rubber extruder, including a double cone extruder body and an extrusion cylinder disposed on the double cone extruder body. An extrusion die head is fixedly installed at one end of the extrusion cylinder, and a feed hopper is fixedly installed at the upper end of the extrusion cylinder. A support base is provided at the lower end of the extrusion cylinder and the extrusion die head. A feed rate control component is provided inside the feed hopper, and a fixing insertion hole is provided through the lower part of the inner sides of the feed hopper. The feed rate control component includes an opening and closing guide plate and a support guide plate. The support guide plate is fixedly sleeved inside the fixed insertion hole, and a rotating rod is rotatably sleeved inside the support guide plate.

[0007] Furthermore, an opening and closing guide plate is fixedly sleeved on the outer side of the rotating rod, and the four opening and closing guide plates are rotatably sleeved on the lower part of the inner wall of the feed hopper. A bearing sleeve is fixedly installed on one side of the supporting guide plate, and the inside of the bearing sleeve is rotatably sleeved on one end of the outer side of the rotating rod. A gear is fixedly installed on one end of the rotating rod.

[0008] Furthermore, a spur gear is meshed with the outer side of the gear, a limit block is fixedly installed at one end of the spur gear, a sliding rod is fixedly installed at the upper end of the spur gear, a support guide rod is slidably sleeved on the outer side of the sliding rod, one side of the support guide rod is fixedly installed at one end of the feed hopper, and a guide groove is formed inside the support guide rod.

[0009] Furthermore, a push rod is fixedly installed at one end of the spur gear, a telescopic hydraulic cylinder is fixedly installed at one end of the push rod, a fixing plate is fixedly installed at one end of the telescopic hydraulic cylinder, and the lower end of the fixing plate is fixedly installed at the upper end of the extrusion cylinder.

[0010] Furthermore, a fixing groove is provided on one side of both the upper and lower ends of the opening and closing guide plate, and a first support limiting plate and a second support limiting plate are fixedly installed inside the fixing groove.

[0011] Furthermore, the upper and lower ends of the opening and closing guide plate are provided with slots, and the inside of the slots is respectively engaged with one end of the first support limiting plate and the second support limiting plate.

[0012] The technical solution provided by this utility model has the following advantages compared with the known prior art: 1. This utility model uses a telescopic hydraulic cylinder to drive a spur gear, gear, and rotating rod in a coordinated manner to achieve synchronous adjustment of the angle of four opening and closing guide plates, thereby changing the degree of opening and closing of the inner wall channel of the feed hopper. This allows for precise control of the amount of rubber granules fed, avoiding excessive or insufficient feeding, effectively preventing excessive rubber raw material in the extrusion cylinder, and preventing some raw material from failing to melt in time, which could affect the extrusion quality, such as unmelted granules or poor uniformity of the extrudate.

[0013] 2. The spur gear slides along the guide groove of the support guide rod, and the sliding rod slides on the outside. With the constraint of the limit block, the movement of the spur gear is ensured to be smooth. The rotating rod rotates stably through the bearing sleeve, so that the angle adjustment of the opening and closing guide plate is stable, reducing fluctuations during the feeding process. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the feed rate control component of this utility model; Figure 3 This is a schematic diagram of the feeding hopper and supporting guide plate structure of this utility model; Figure 4 This is a schematic diagram of the opening and closing guide plate and rotating rod structure of this utility model; Figure 5 This is a schematic diagram of the gear, sliding rod, and spur gear structure of this utility model; Figure 6 This is a schematic diagram of the structure of the first support limiting plate and the second support limiting plate of this utility model; The labels in the diagram represent: 1. Double cone extruder body; 2. Extrusion barrel; 3. Extrusion die head; 4. Support base; 5. Feed hopper; 51. Fixing hole; 6. Feed rate control component; 61. Opening and closing guide plate; 62. Fixing plate; 63. Telescopic hydraulic cylinder; 64. Push rod; 65. Support guide rail rod; 66. Support guide plate; 67. Guide rail groove; 68. Bearing sleeve; 69. Rotating rod; 610. Sliding rod; 611. Straight gear; 612. Limiting block; 613. Gear; 614. Fixing groove; 615. First support limiting plate; 616. Slot; 617. Second support limiting plate. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0017] The present invention will be further described below with reference to the embodiments.

[0018] Example 1: Reference Figures 1 to 5 This first embodiment of the present invention discloses a double-cone rubber extruder, including a double-cone extruder body 1 and an extrusion cylinder 2 disposed on the double-cone extruder body 1. An extrusion die head 3 is fixedly installed at one end of the extrusion cylinder 2, and a feed hopper 5 is fixedly installed at the upper end of the extrusion cylinder 2. A support base 4 is provided at the lower end of the extrusion cylinder 2 and the extrusion die head 3. A feed rate control component 6 is disposed inside the feed hopper 5. Fixed insertion holes 51 are provided through the lower part of both sides of the feed hopper 5. The feed rate control component 6 is used to control the feed rate of rubber particles entering the extrusion cylinder 2. The core principle of the double-cone rubber extruder is to convey, compress, plasticize, and mix rubber materials through the rotational motion of the double-cone screw, and finally extrude them through the die. Its key lies in utilizing the conical structure of the screw to achieve material processing. The double-cone rubber extruder is an existing technology and will not be described in detail here. The feed rate control assembly 6 includes an opening and closing guide plate 61 and a support guide plate 66. The support guide plate 66 is fixedly sleeved inside the fixed insertion hole 51. Rotating rods 69 are rotatably sleeved inside the support guide plate 66. The opening and closing guide plates 61 are fixedly sleeved on the outer side of the rotating rods 69. The rotation of the four rotating rods 69 further drives the four opening and closing guide plates 61 to rotate in terms of angle and opening and closing action, thereby controlling the feed rate of rubber granules from the feed hopper 5 and reducing or increasing the amount of rubber granule raw material entering the extruder. Inside the cylinder 2, four opening and closing guide plates 61 are rotatably sleeved on the lower part of the inner wall of the feed hopper 5. A bearing sleeve 68 is fixedly installed on one side of the supporting guide plate 66. The two ends of the four rotating rods 69 are fixedly sleeved on the inner ring of the bearing sleeve 68. The inner ring of the bearing sleeve 68 rotates inside its outer ring. The inner part of the bearing sleeve 68 is rotatably sleeved on the outer side of the rotating rod 69 near one end. A gear 613 is fixedly installed on one end of each rotating rod 69. When the gear 613 rotates, it further drives the rotating rod 69 to rotate.

[0019] A spur gear 611 is meshed with the outer side of the gear 613. A limit block 612 is fixedly installed at one end of the spur gear 611. A sliding rod 610 is fixedly installed at the upper end of the spur gear 611. A support guide rod 65 is slidably sleeved on the outer side of the sliding rod 610. One side of the support guide rod 65 is fixedly installed at one end of the feed hopper 5. A guide groove 67 is opened inside the support guide rod 65. A push rod 64 is fixedly installed at one end of the spur gear 611. A telescopic hydraulic cylinder 63 is fixedly installed at one end of the push rod 64. A fixing plate 62 is fixedly installed at one end of the telescopic hydraulic cylinder 63. The lower end of the fixing plate 62 is fixedly installed at the upper end of the extrusion cylinder 2. When the telescopic hydraulic cylinder 63 is activated, its piston rod will drive the push rod 64 to perform telescopic movement. The movement of push rod 64 will drive the connected spur rod 611 to move synchronously. At this time, the spur rod 611 slides smoothly along the guide groove 67 in the support guide rod 65, and the sliding rod 610 slides on the outside of the support guide rod 65, playing an auxiliary guiding and stabilizing role. The limiting block 612 prevents the spur rod 611 from disengaging from the support guide rod 65.

[0020] In use, when the feed rate needs to be adjusted, the telescopic hydraulic cylinder 63 is activated. The extension and retraction of its piston rod drives the push rod 64 to move synchronously. The movement of the push rod 64 directly drives the spur gear 611 to move. At this time, the spur gear 611 slides smoothly along the guide groove 67 in the support guide rod 65, while the sliding rod 610 slides on the outside of the support guide rod 65. The two work together to ensure the stable movement of the spur gear 611. The limit block 612 prevents the spur gear 611 from sliding out of the support guide rod 65. As the spur gear 611 moves, the four gears 613 meshing with it will rotate accordingly. The rotation of the rotating rod 69, which is fixedly connected to it, rotates synchronously. The two ends of the rotating rod 69 achieve stable rotation through the bearing sleeves 68. The rotation of the rotating rod 69 directly drives the opening and closing guide plate 61 fixed on its outer side to adjust the angle. The four opening and closing guide plates 61 rotate synchronously at the lower part of the inner wall of the feed hopper 5. By changing the degree of opening and closing of the channels formed between them, the feed amount of rubber particles is controlled. When the channel is opened wide, the feed amount increases, and when the channel is closed, the feed amount decreases, thereby reducing the excessive amount of rubber raw material inside the extrusion cylinder 2 of the extruder, which causes some rubber raw material to not melt in time.

[0021] Example 2: Reference Figure 6This is the second embodiment of the present invention. This embodiment differs from the first embodiment in that: a fixing groove 614 is provided on one side of both the upper and lower ends of the opening and closing guide plate 61. A first support limiting plate 615 and a second support limiting plate 617 are fixedly installed inside the fixing groove 614. A slot 616 is provided on both the upper and lower ends of the opening and closing guide plate 61. The slot 616 is respectively engaged with one end of the first support limiting plate 615 and the second support limiting plate 617. When the four opening and closing guide plates 61 are closed, to prevent the rubber material above the opening and closing guide plates 61 from being too heavy, thus causing the rubber material to automatically push open the four opening and closing guide plates 61 and leak downwards into the extrusion cylinder 2, the first support limiting plate 615 and the second support limiting plate 617 engage with the slots 616 at the upper and lower ends of the opening and closing guide plate 61. The four opening and closing guide plates 61 are supported by the first support limiting plate 615 and the second support limiting plate 617.

[0022] The remaining structure is the same as that in Example 1.

[0023] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A double cone rubber extruder, comprising a double cone extruder body (1) and an extrusion cylinder (2) disposed on the double cone extruder body (1), characterized in that: One end of the extrusion cylinder (2) is fixedly installed with an extrusion die head (3), the upper end of the extrusion cylinder (2) is fixedly installed with a feed hopper (5), the lower end of the extrusion cylinder (2) and the extrusion die head (3) is provided with a support base (4), the inside of the feed hopper (5) is provided with a feed amount control component (6), and the lower part of both sides of the feed hopper (5) is provided with a fixed insertion hole (51). The feed rate control component (6) includes an opening and closing guide plate (61) and a support guide plate (66). The support guide plate (66) is fixedly sleeved inside the fixed insertion hole (51), and a rotating rod (69) is rotatably sleeved inside the support guide plate (66).

2. The double cone rubber extruder according to claim 1, characterized in that, An opening and closing guide plate (61) is fixedly sleeved on the outside of the rotating rod (69). All four opening and closing guide plates (61) are rotatably sleeved on the lower part of the inner wall of the feed hopper (5). A bearing sleeve (68) is fixedly installed on one side of the supporting guide plate (66). The inside of the bearing sleeve (68) is rotatably sleeved on one end of the outside of the rotating rod (69). A gear (613) is fixedly installed on one end of the rotating rod (69).

3. A double cone rubber extruder according to claim 2, characterized in that, The gear (613) is meshed with a spur gear (611) on its outer side. A limit block (612) is fixedly installed at one end of the spur gear (611). A sliding rod (610) is fixedly installed at the upper end of the spur gear (611). A support guide rod (65) is slidably sleeved on the outer side of the sliding rod (610). One side of the support guide rod (65) is fixedly installed at one end of the feed hopper (5). A guide groove (67) is opened inside the support guide rod (65).

4. A double cone rubber extruder according to claim 3, characterized in that, A push rod (64) is fixedly installed at one end of the straight toothed rod (611), a telescopic hydraulic cylinder (63) is fixedly installed at one end of the push rod (64), a fixing plate (62) is fixedly installed at one end of the telescopic hydraulic cylinder (63), and the lower end of the fixing plate (62) is fixedly installed at the upper end of the extrusion cylinder (2).

5. A double cone rubber extruder according to claim 1, characterized in that, The opening and closing guide plate (61) has a fixing groove (614) on one side at both the upper and lower ends. The first support limiting plate (615) and the second support limiting plate (617) are fixedly installed inside the fixing groove (614).

6. A double cone rubber extruder according to claim 5, characterized in that, The opening and closing guide plate (61) is provided with slots (616) at both the upper and lower ends. The slots (616) are respectively engaged at one end of the first support limiting plate (615) and the second support limiting plate (617).

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