A multi-port vulcanized rubber extruder

Abstract

This disclosure relates to the field of rubber processing technology. One embodiment of this disclosure provides a multi-nozzle vulcanizing rubber extruder, comprising: an extruder body, an extrusion disc disposed at the extrusion end of the extruder body, an extrusion switching assembly disposed on the extrusion disc, and a switching insertion assembly disposed on the extruder body; the extrusion switching assembly includes a switching cavity located inside the extrusion disc, a switching motor disposed on the side wall of the extrusion disc, the output end of the switching motor being inserted into the interior of the switching cavity, a linkage frame disposed on the side wall of the switching disc, an extrusion forming frame disposed at the end of the linkage frame, and an extrusion forming mesh disposed inside the extrusion forming frame. Through the above technical solution, the technical problem that existing single-nozzle vulcanizing rubber extruders can only produce rubber products with a single cross-sectional shape, and that to produce products with different cross-sections, it is necessary to stop the machine to disassemble and replace the mold, which is not only time-consuming and labor-intensive, but also accelerates mold wear, increases production costs, and reduces production efficiency.

Description

Technical Field

[0001] The embodiments of this disclosure relate to the field of rubber processing technology, and more specifically, to a multi-nozzle vulcanized rubber extruder. Background Technology

[0002] In the rubber products industry, extrusion molding of vulcanized rubber is one of the key processes. With the increasing demand for diversified rubber products in the market, traditional single-nozzle extruders can no longer meet production needs.

[0003] In the past, single-nose vulcanizing rubber extruders could only produce rubber products with a single cross-sectional shape. To produce products with different cross-sections, it was necessary to stop the machine to disassemble and replace the molds, which was not only time-consuming and labor-intensive, but also accelerated mold wear, increased production costs, and reduced production efficiency. At the same time, the sealing and discharge design of the rubber material in this type of extruder was not reasonable enough, which easily led to material leakage, affecting product quality and the production environment. Moreover, the discharge structure could not effectively guide the rubber strip to be output smoothly, resulting in rubber strip deformation and a decrease in the pass rate. In addition, the equipment lacked systematic optimization in terms of die switching, sealing reinforcement, and safety protection, making it difficult to adapt to the requirements of modern and efficient production. Therefore, developing a vulcanizing rubber extruder that can achieve rapid switching of multiple dies, efficient extrusion, and stable and reliable operation has become an urgent problem to be solved in the industry, which has also pointed the way for the technological development of multi-die vulcanizing rubber extruders. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a multi-nozzle vulcanizing rubber extruder, which solves the technical problem that the existing single-nozzle vulcanizing rubber extruder can only produce rubber products with a single cross-sectional shape. If products with different cross-sections are to be produced, the machine needs to be stopped to disassemble and replace the mold, which is not only time-consuming and labor-intensive, but also accelerates mold wear, increases production costs, and reduces production efficiency.

[0005] According to one aspect, at least one embodiment of this disclosure provides a multi-hole vulcanizing rubber extruder, comprising:

[0006] An extruder body, wherein the extrusion end of the extruder body is provided with an extrusion disc;

[0007] An extrusion switching assembly is disposed on the extrusion disc;

[0008] A switching plug assembly is disposed on the extruder body;

[0009] The extrusion switching assembly includes a switching cavity, which is located inside the extrusion disc. A switching motor is provided on the side wall of the extrusion disc, and the output end of the switching motor is inserted into the interior of the switching cavity. A switching disk is provided at the output end of the switching motor, and the switching disk is embedded inside the switching cavity. A linkage frame is provided on the side wall of the switching disk, and an extrusion forming frame is provided at the end of the linkage frame. An extrusion forming mesh is provided inside the extrusion forming frame.

[0010] As a further technical solution, the extrusion disc has an extrusion port, the extrusion tube of the extruder body is inserted into the extrusion port, and the position of the extrusion port corresponds to that of the extrusion forming frame.

[0011] As a further technical solution, the switching plug-in assembly includes a plug-in sleeve, which is fitted onto the extrusion tube of the extruder body. The end of the plug-in sleeve is provided with a plug-in ring, which is sealed and plugged into the extrusion port. A portion of the plug-in ring is inserted into the extrusion forming frame.

[0012] As a further technical solution, the side wall of the extrusion disc is provided with an outlet groove, which is connected to the extrusion port and is perpendicular to the side wall of the extrusion disc.

[0013] As a further technical solution, the side wall of the extrusion disc is provided with an outlet slide, which is located on the lower end face of the outlet groove, and the cross-section of the outlet slide is semi-circular.

[0014] As a further technical solution, the insert sleeve is sealed and inserted into the extrusion tube of the extruder body, and a reinforcing ring is provided on the outer wall of the insert sleeve, and the reinforcing ring is fixedly fitted on the insert sleeve.

[0015] As a further technical solution, the lower end face of the extrusion disc has an arc-shaped structure, and the extrusion disc is fixedly connected to the side wall of the extruder body.

[0016] As a further technical solution, intercepting plates are provided on both sides of the upper end face of the discharge slide, and one end of the intercepting plate is fixedly attached to the extrusion disc.

[0017] The beneficial effects of the embodiments disclosed herein are as follows:

[0018] 1. In this disclosure, the switching motor in the extrusion switching assembly drives the switching disc to rotate, thereby realizing the rapid switching of extrusion forming meshes with different die shapes. There is no need to stop the machine to disassemble the mold, and rubber products with various cross-sectional shapes can be produced continuously.

[0019] 2. In this disclosure, the sealing plug-in design of the switching plug-in component, combined with the precision sealing structure of the extrusion disc and the extrusion molding frame, effectively prevents rubber material leakage; the combination of the outlet groove and the semi-circular outlet slide can guide the rubber strip to be smoothly discharged, reducing deformation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0022] Figure 2 This is a front cross-sectional view of the extrusion disc of this disclosure;

[0023] Figure 3 This is another cross-sectional view of the extrusion disc of this disclosure;

[0024] Figure 4 Appendix to this disclosure Figure 3 Enlarged view of part A;

[0025] In the diagram: 1. Extruder body; 2. Extrusion disc; 3. Extrusion switching assembly; 3-1. Switching chamber; 3-2. Switching motor; 3-3. Switching disc; 3-4. Linkage frame; 3-5. Extrusion forming frame; 3-6. Extrusion forming screen; 3-7. Extrusion port; 4. Switching insertion assembly; 4-1. Insertion sleeve; 4-2. Insertion ring; 4-3. Outlet slide; 4-4. Reinforcing ring; 5. Outlet groove; 6. Interceptor plate. Detailed Implementation

[0026] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0027] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0028] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0029] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0031] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] like Figures 1-4 As shown, it illustrates a multi-nozzle vulcanizing rubber extruder of this disclosure, comprising:

[0033] The extruder body 1 has an extrusion disc 2 at its extrusion end;

[0034] Extrusion switching component 3 is mounted on extrusion disc 2;

[0035] Switch plug-in assembly 4, which is mounted on the extruder body 1;

[0036] The extrusion switching assembly 3 includes a switching cavity 3-1, which is located inside the extrusion disc 2. A switching motor 3-2 is provided on the side wall of the extrusion disc 2. The output end of the switching motor 3-2 is inserted into the interior of the switching cavity 3-1. A switching disc 3-3 is provided at the output end of the switching motor 3-2. The switching disc 3-3 is embedded inside the switching cavity 3-1. A linkage frame 3-4 is provided on the side wall of the switching disc 3-3. An extrusion forming frame 3-5 is provided at the end of the linkage frame 3-4. An extrusion forming mesh 3-6 is provided inside the extrusion forming frame 3-5.

[0037] The switching connector assembly 4 includes a connector sleeve 4-1, which is fitted onto the extrusion tube of the extruder body 1. A connector ring 4-2 is provided at the end of the connector sleeve 4-1. The connector ring 4-2 is sealed and connected to the extrusion port 3-7. A portion of the connector ring 4-2 is inserted into the extrusion forming frame 3-5.

[0038] In some examples, the extrusion tube of the extruder body 1 and the extrusion port 3-7 of the extrusion disc 2 require a high-precision sealing connection. A structure with a sealing groove and an O-ring can be used. After inserting the extrusion tube into the extrusion port 3-7, tightening the surrounding bolts causes the sealing ring to deform under pressure, thus achieving a tight seal and preventing rubber leakage. Before installation, the sealing surfaces of the extrusion tube and the extrusion port 3-7 must be cleaned and polished to ensure a smooth surface free of impurities. Then, the sealing ring is correctly installed in the sealing groove of the extrusion port 3-7, and an appropriate amount of lubricant is applied to facilitate the insertion of the extrusion tube. When inserting the extrusion tube, care must be taken to ensure... Verify the concentricity of the extrusion tube with the extrusion port 3-7 to prevent damage to the sealing ring due to eccentric pressure. Finally, tighten the bolts sequentially according to the specified torque value to securely connect the extrusion tube to the extrusion disc 2. Precisely cut the switching cavity 3-1 inside the extrusion disc 2, ensuring its dimensional accuracy and surface roughness meet requirements. Fix the switching motor 3-2 to the side wall of the extrusion disc 2 using the matching mounting bracket. A shock-absorbing pad should be added between the mounting bracket and the extrusion disc 2 to reduce vibration transmission during motor operation. Ensure coaxiality at the connection between the motor output end and the switching cavity 3-1. This can be achieved by adjusting the motor mounting position and using a coupling. The device needs to have a certain degree of elasticity to compensate for possible minor deviations. The installation of the switching disc 3-3 and the connecting frame 3-4 involves embedding the switching disc 3-3 into the switching cavity 3-1, ensuring a uniform gap between the switching disc 3-3 and the inner wall of the switching cavity 3-1, generally controlled between 0.1-0.3mm. This avoids both excessive gap leading to material leakage and excessive gap causing friction and jamming. The connection between the connecting frame 3-4 and the side wall of the switching disc 3-3 uses a pin connection. The pin needs to be heat-treated to improve its strength and wear resistance. The connection between the connecting frame 3-4 and the extrusion forming frame 3-5 must also be firm and reliable, which can be achieved by welding or bolts. Connect the parts and perform flaw detection to ensure that there are no defects at the connection points. When installing the extrusion forming mesh 3-6 inside the extrusion forming frame 3-5, select the appropriate forming mesh according to the required rubber product die shape. The forming mesh and the forming frame can be installed by using a slot fit or screw fixation. When using a slot fit, the size of the slot must be precisely matched with the edge of the forming mesh. After installation, the forming mesh should be able to slide freely in the slot without shaking. When using screw fixation, ensure that the screws are tightened to prevent the forming mesh from loosening during the extrusion process. At the same time, before installing the forming mesh, the forming frame and the forming mesh need to be cleaned to remove oil and impurities from the surface.

[0039] The insert sleeve 4-1 is fitted onto the extrusion tube of the extruder body 1. The insert sleeve 4-1 and the extrusion tube are connected by a sealed insertion method. A sealing groove is set on the inner wall of the insert sleeve 4-1, and a high-temperature resistant and oil-resistant fluororubber sealing ring is installed. During installation, a small amount of silicone-based grease is applied to the surface of the sealing ring, and then the insert sleeve 4-1 is slowly fitted into the extrusion tube to ensure that the sealing ring is evenly compressed. The insert ring 4-2 is installed with the extrusion port 3-7 and the forming frame: The insert ring 4-2 at the end of the insert sleeve 4-1 must be precisely sealed and inserted with the extrusion port 3-7 and the extrusion forming frame 3-5. A sealing groove is set on the outer side of the insert ring 4-2, and a sealing ring that is compatible with the inner wall of the extrusion port 3-7 and the forming frame is installed.

[0040] like Figures 1-4 As shown, this embodiment proposes that the extrusion disc 2 has an extrusion port 3-7, and the extrusion tube of the extruder body 1 is inserted into the extrusion port 3-7. The position of the extrusion port 3-7 corresponds to that of the extrusion forming frame 3-5.

[0041] In some examples, during installation, the insertion ring 4-2 is first aligned with the extrusion port 3-7 and slowly inserted to ensure the concentricity of the insertion ring 4-2 and the extrusion port 3-7. After the insertion ring 4-2 has been inserted to a certain depth into the extrusion port 3-7, it is pushed further in so that a part of it is inserted into the extrusion molding frame 3-5 to achieve a sealed connection between the three. During the insertion process, the condition of the sealing ring should be carefully observed to prevent it from being twisted or damaged.

[0042] For example, such as Figure 1 As shown, the side wall of the extrusion disc 2 has an outlet groove 5, which is connected to the extrusion port 3-7. The outlet groove 5 is vertically opened on the side wall of the extrusion disc 2.

[0043] In some examples, the outlet slot 5 is used to allow the extruded material to fall off, making it more concentrated for collection.

[0044] For example, such as Figure 1 As shown, the side wall of the extrusion disc 2 is provided with an outlet slide 4-3, which is located on the lower end face of the outlet groove 5. The cross-section of the outlet slide 4-3 is semi-circular.

[0045] In some examples, the extruded rubber strip enters the discharge groove 5 (vertically opened on the side wall of the extrusion disc 2) from the extrusion port 3-7, and slides down the discharge groove 5 to the discharge slide 4-3 (semi-circular cross section). The slide can guide the rubber strip to be discharged smoothly and avoid deformation.

[0046] For example, such as Figure 4 As shown, the insert sleeve 4-1 is sealed and inserted into the extrusion tube of the extruder body 1. A reinforcing ring 4-4 ​​is provided on the outer wall of the insert sleeve 4-1, and the reinforcing ring 4-4 ​​is fixedly fitted onto the insert sleeve 4-1.

[0047] In some examples, to enhance the stability of the plug sleeve 4-1, a reinforcing ring 4-4 ​​is fitted on the outside of the reinforcing ring 4-4. The reinforcing ring 4-4 ​​and the plug sleeve 4-1 are connected by welding or bolts. The bolts should be evenly distributed and tightened to the specified torque.

[0048] For example, such as Figure 1 As shown, the lower end face of the extrusion disc 2 has an arc-shaped structure, and the extrusion disc 2 is fixedly connected to the side wall of the extruder body 1.

[0049] In some examples, the lower end face of the extrusion disc 2 is designed as an arc-shaped structure, which needs to be fitted and fixed to the side wall of the extruder body 1 (e.g., by welding or high-strength bolts) to ensure uniform force during extrusion and avoid material leakage.

[0050] For example, such as Figure 1 As shown, intercepting plates 6 are provided on both sides of the upper end face of the discharge chute 4-3, and one end of the intercepting plate 6 is fixedly attached to the extrusion disc 2.

[0051] In some examples, the interceptor plate 6 on the upper surface of the export slide 4-3 prevents the rubber strip from splashing upwards during export, ensuring operational safety.

[0052] Before starting the switching motor 3-2, check whether the motor wiring is correct and whether the connections of each component are secure. When starting, control the motor speed through the frequency converter and set the speed within the range of 5-10 rpm to avoid damage to the equipment structure caused by the impact of motor starting. After the motor starts, closely observe the motor's operation, including the motor current, sound and temperature, to ensure that the motor is operating normally.

[0053] The output of the switching motor 3-2 drives the switching disk 3-3 to rotate within the switching chamber 3-1. The rotational motion of the switching disk 3-3 is converted into the translational or rotational motion of the extrusion forming frame 3-5 through the linkage frame 3-4. During the motion, it is necessary to ensure that the connection between the linkage frame 3-4 and the switching disk 3-3 and the extrusion forming frame 3-5 rotates flexibly without jamming. Lubricating grease can be applied to the connection parts periodically to reduce frictional resistance. At the same time, the motion trajectory of the switching disk 3-3 and the linkage frame 3-4 should be monitored to ensure that their motion accuracy meets the design requirements.

[0054] When the target extrusion forming mesh 3-6 moves with the connecting frame 3-4 to the position aligned with the extrusion nozzle 3-7, the switching motor 3-2 stops rotating. At this time, the switching disk 3-3 and the extrusion forming frame 3-5 need to be locked by the positioning device to prevent them from shifting during the extrusion process. The positioning device can be a mechanical positioning pin or an electromagnetic positioning device. After the target nozzle is aligned, quickly insert the positioning pin into the corresponding positioning hole or activate the electromagnetic positioning device to achieve precise locking. After locking, check the alignment of the target nozzle and the extrusion nozzle 3-7 again to ensure that they are completely aligned.

[0055] The extruder body 1 pushes the vulcanized rubber material through the extrusion tube to the extrusion port 3-7. Due to the sealed connection between the insertion ring 4-2 and the extrusion port 3-7 and the extrusion forming frame 3-5, the rubber material can only be extruded through the orifice of the extrusion forming mesh 3-6. During the extrusion process, the screw speed and temperature of the extruder body 1 must be controlled to ensure that the rubber material has suitable fluidity and extrusion pressure. Generally, the screw speed can be adjusted between 5-30 rpm according to the properties of the rubber material and product requirements, and the temperature is controlled within the range of 150-180℃. At the same time, the pressure change during the extrusion process must be monitored by a pressure sensor to ensure that the pressure is stable within the set range.

[0056] The extruded rubber strip enters the discharge groove 5 from the extrusion port 3-7. The discharge groove 5 is vertically opened on the side wall of the extrusion disc 2. Its function is to guide the rubber strip to slide smoothly. The inner wall of the discharge groove 5 should be smooth. It can be improved by chrome plating or spraying a wear-resistant coating to reduce the friction between the rubber strip and the groove wall. The rubber strip slides down from the discharge groove 5 to the discharge slide 4-3. The semi-circular cross-section design of the discharge slide 4-3 can make the rubber strip slide smoothly discharged in the slide and avoid deformation due to uneven force. A layer of low friction coefficient material, such as polytetrafluoroethylene, can be laid on the surface of the slide to further reduce the discharge resistance of the rubber strip.

[0057] The interceptor plates 6 set on opposite sides of the upper end face of the discharge slide 4-3 can effectively prevent the rubber strip from splashing upwards during the discharge process, ensuring the safety of the operators. The interceptor plates 6 are connected to the extrusion disc 2 by welding or bolting, and the connection parts must be firm and reliable. The height of the interceptor plates 6 is generally set to 20-30mm, which can effectively block the rubber strip from splashing without affecting the normal discharge of the rubber strip. At the same time, the installation of the interceptor plates 6 should be checked regularly to ensure that there is no loosening or deformation.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A multi-nozzle vulcanizing rubber extruder, characterized in that, include: Extruder body (1), wherein the extrusion end of the extruder body (1) is provided with an extrusion disc (2); An extrusion switching assembly (3) is disposed on the extrusion disc (2); A switching plug assembly (4) is disposed on the extruder body (1); The extrusion switching assembly (3) includes a switching cavity (3-1) which is located inside the extrusion disc (2). A switching motor (3-2) is provided on the side wall of the extrusion disc (2). The output end of the switching motor (3-2) is inserted into the interior of the switching cavity (3-1). A switching disk (3-3) is provided at the output end of the switching motor (3-2). The switching disk (3-3) is embedded inside the switching cavity (3-1). A linkage frame (3-4) is provided on the side wall of the switching disk (3-3). An extrusion forming frame (3-5) is provided at the end of the linkage frame (3-4). An extrusion forming mesh (3-6) is provided inside the extrusion forming frame (3-5).

2. The multi-nozzle vulcanizing rubber extruder according to claim 1, characterized in that, The extrusion disc (2) has an extrusion port (3-7), and the extrusion tube of the extruder body (1) is inserted into the extrusion port (3-7). The extrusion port (3-7) corresponds to the position of the extrusion forming frame (3-5).

3. The multi-nozzle vulcanizing rubber extruder according to claim 2, characterized in that, The switching plug assembly (4) includes a plug sleeve (4-1), which is fitted onto the extrusion tube of the extruder body (1). The end of the plug sleeve (4-1) is provided with a plug ring (4-2), which is sealed and plugged into the extrusion port (3-7). A portion of the plug ring (4-2) is inserted into the extrusion forming frame (3-5).

4. A multi-nozzle vulcanizing rubber extruder according to claim 2, characterized in that, The side wall of the extrusion disc (2) has an outlet groove (5), which is connected to the extrusion port (3-7). The outlet groove (5) is perpendicular to the side wall of the extrusion disc (2).

5. A multi-nozzle vulcanizing rubber extruder according to claim 4, characterized in that, The side wall of the extrusion disc (2) is provided with an outlet slide (4-3), which is located on the lower end face of the outlet groove (5). The cross-section of the outlet slide (4-3) is semi-circular.

6. A multi-nozzle vulcanizing rubber extruder according to claim 3, characterized in that, The plug sleeve (4-1) is sealed and plugged into the extrusion tube of the extruder body (1). A reinforcing ring (4-4) is provided on the outer side wall of the plug sleeve (4-1). The reinforcing ring (4-4) is fixedly fitted on the plug sleeve (4-1).

7. A multi-nozzle vulcanizing rubber extruder according to claim 1, characterized in that, The lower end face of the extrusion disc (2) has an arc-shaped structure, and the extrusion disc (2) is fixedly connected to the side wall of the extruder body (1).

8. A multi-nozzle vulcanizing rubber extruder according to claim 5, characterized in that, The upper end face of the discharge slide (4-3) is provided with intercepting plates (6) on both sides, and one end of the intercepting plate (6) is fixedly attached to the extrusion disc (2).

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