Processing technology and device for damping rubber strip

Abstract

The device comprises an extruder and an extrusion die arranged at a discharge port of the extruder, the extrusion die is provided with a central extrusion channel coaxial with the extrusion port and an annular variable-diameter channel surrounding the central extrusion channel, and a rolling assembly is further arranged at the discharge end of the extrusion die. Through the central extrusion channel and the annular variable-diameter channel which are arranged in the extrusion die, the melt extruded from the annular variable-diameter channel can be coated on the melt from the central extrusion channel, and the melt is fused and formed at the outlet of the die to finally form a rubber blank strip; therefore, the purpose of producing rubber blank strips with different diameters is achieved by adjusting the inner diameter of the annular variable-diameter channel, and the problem that an existing device cannot stably extrude rubber strips with different diameters is solved.

Description

Technical Field

[0001] The invention relates to the technical field of rubber material processing, and in particular to a processing technology and a device for a shock-absorbing rubber strip. Background Art

[0002] As an important shock-absorbing and cushioning material, shock-absorbing rubber strips are widely used in many industrial fields and various products in daily life, such as automobile manufacturing, mechanical equipment shock absorption, building door and window sealing, etc. Its good elasticity and shock-absorbing performance can effectively reduce vibration transmission, reduce noise, and improve the stability and service life of related parts or equipment.

[0003] The processing of shock-absorbing rubber strips mostly adopts the extrusion molding process. This process is to convey the mixed rubber raw materials into the extruder, and under the driving action of the screw, the rubber passes through the extrusion die of a specific shape, and finally forms a rubber strip product with the corresponding cross-sectional shape and size. The extrusion die directly determines the final cross-sectional shape and size specifications of the rubber strip, and is a key factor in realizing the molding of different types of shock-absorbing rubber strips. In the actual production process, the market has various demands for the diameter of shock-absorbing rubber strips, and different application scenarios often require rubber strip products with different diameter specifications. However, the existing processing devices have obvious deficiencies in dealing with such diverse diameter requirements, which is specifically manifested in that when shock-absorbing rubber strips of different diameters need to be produced, the corresponding extrusion die must be replaced. The entire process of replacing the extrusion die is time-consuming. It often takes several hours or even longer from the equipment shutdown to the restart of normal production. This not only greatly reduces production efficiency, causes delays in production plans, and increases production costs, but also frequently replaces the die. It will cause a certain degree of wear on the die itself and the related connecting parts of the extruder, affecting the overall service life and precision of the equipment, and indirectly affecting the stability of product quality.

[0004] A Chinese patent (publication number CN111873370A) discloses an automobile door and window rubber strip extrusion molding die, comprising a connecting tube, a conversion disk, a connecting plate, a connecting shaft, an extrusion tube and a limiting mechanism. The connecting tube is a tubular structure, a connecting plate is installed on the top of the right end of the connecting tube, the connecting shaft is installed on the right side of the connecting plate, and the right end of the connecting shaft is installed on the middle of the left side of the conversion disk through a bearing. The outer end of the conversion disk is symmetrically provided with four circular placement grooves, each placement groove is distributed with an extrusion tube, and a limiting mechanism is connected between each extrusion tube and the placement groove.

[0005] The molding die switches between extrusion tubes of different diameters by rotating the rotating disk, so that rubber strips of different diameters can be extruded. However, in the process of frequently rotating the rotating disk to switch between extrusion tubes of different diameters, it is difficult to ensure that the extrusion tube always maintains high-precision coaxiality with the screw, the die head, and the entire subsequent extrusion flow channel. Even if the coaxiality of each component is accurately debugged during the initial installation, coaxiality deviation is very likely to occur with multiple rotations of the rotating disk, vibrations during equipment operation, and long-term use. If there is a problem with coaxiality, the rubber will be unevenly stressed during extrusion, resulting in uneven wall thickness of the extruded rubber strip, affecting product quality and dimensional accuracy. In severe cases, it may even cause production failures such as blockages, affecting the normal production process. Reliable sealing needs to be ensured for the parts where extrusion tubes of different diameters are connected to the rotating disk and other internal structures of the mold. Since the rubber extrusion process is often accompanied by a certain amount of pressure, and the rubber raw material has a certain degree of viscosity and fluidity, if the seal is not good, the rubber may leak from the interface, which will cause a waste of raw materials and increase production costs. On the other hand, the leaked rubber accumulates inside the mold, which may affect the normal rotation of the rotating disk and may even be mixed into the subsequent extruded materials, resulting in product inclusions, surface defects and other quality problems. In order to maintain a good sealing effect under long-term use and frequent switching, there are extremely high requirements for the selection of sealing materials, the design of sealing structures and the durability of sealing components. Summary of the invention

[0006] In view of the problems of the prior art, a processing technology and device for a shock-absorbing rubber strip are provided. By arranging a central extrusion channel and an annular variable diameter channel in an extrusion mold, the molten material extruded from the annular variable diameter channel can be coated on the molten material from the central extrusion channel, and is fused and formed at the mold outlet to finally form a rubber strip. Thus, the inner diameter of the annular variable diameter channel is adjusted to achieve the purpose of producing rubber strips of different diameters, thereby solving the problem that the existing device cannot stably extrude rubber strips of different diameters.

[0007] To solve the problems of the prior art, the present invention provides a processing technology for a shock-absorbing rubber strip, comprising the following steps: step one, putting rubber pellets into an extruder, the extruder melts the rubber pellets and extrude them into an extrusion die; step two, performing double-layer extrusion molding of a rubber strip through the extrusion die; step three, performing a rounding operation on the rubber strip; step four, cooling and molding the rubber strip; in step two, the extrusion die has a central extrusion channel coaxial with the discharge port of the extruder and an annular variable diameter channel surrounding the central extrusion channel, the inner diameter of the annular variable diameter channel can be reduced, and the molten material extruded from the annular variable diameter channel is coated on the molten material from the central extrusion channel to form a rubber strip; in step three, a rounding component for rounding the outer side of the rubber strip is also provided at the discharge end of the extrusion die.

[0008] Preferably, the extrusion die also has a buffer cavity connected to the discharge port of the extruder and an extrusion port coaxial with the discharge port of the extruder, the extrusion port is in a conical shape, and is provided with an extrusion plug capable of moving along its axial direction, the extrusion plug is hollow to form the central extrusion channel, and a conical surface is provided at the end of the extrusion plug away from the buffer cavity, and the annular variable diameter channel is formed between the conical surface and the inner wall of the extrusion port, and the extrusion die is also provided with a variable diameter drive component for driving the extrusion plug to move relative to the extrusion die.

[0009] Preferably, the variable diameter driving assembly includes a connecting frame, an adjusting rod, an externally threaded barrel, an internally threaded ring and a driving ring. The connecting frame is slidably arranged in the buffer cavity along the axial direction of the extrusion port, and the end of the extrusion plug facing the buffer cavity is fixedly connected to the connecting frame; the adjusting rod is distributed on the extrusion die along the circumference of the extrusion port, the adjusting rod slides through the end surface of the extrusion die where the extrusion port is arranged, and the adjusting rod is located at the end of the buffer cavity and is fixedly connected to the connecting frame; the externally threaded barrel is arranged on the extrusion die and is coaxial with the extrusion port; the internally threaded ring is coaxially screwed on the externally threaded barrel; the driving ring is coaxially rotatably connected to the internally threaded ring, and the end of the driving ring facing away from the buffer cavity is fixedly connected to the adjusting ring.

[0010] Preferably, the rounding assembly includes a rounding bracket, a rotating ring, a rounding wheel and a rotating driving member, the rounding bracket is arranged at the end of the extrusion die where the extrusion port is arranged; the rotating ring is rotatably arranged in the rounding bracket and is coaxial with the extrusion port; the rounding wheel is arranged along the circumference of the extrusion port at one end of the rotating ring facing the extrusion port, the rounding wheel is rotatably connected to the rotating ring, and the rounding wheel is used to abut against the circumferential surface of the rubber blank strip for rounding; the rotating driving member is arranged on the rounding bracket and is transmission-connected to the rotating ring.

[0011] Preferably, the rotating ring is provided with a slide groove distributed along its circumference, the slide groove extends along the radial direction of the rotating ring, a sliding block is provided in the slide groove, the rolling wheel has a wheel axle coaxial with it, one end of the wheel axle passes through the sliding block and slides with it; the rolling assembly also includes an adjusting ring and an elastic element, the adjusting ring is coaxially rotatably arranged at one end of the rotating ring facing the extrusion port, the inner circumferential surface of the adjusting ring is provided with an adjusting cylinder coaxial with it, the adjusting cylinder passes through the inner wall of the rotating ring and is provided with a positioning ring, the adjusting ring is provided with an adjusting groove distributed along its circumference, the adjusting groove extends in a direction inclined to the radial direction of the adjusting ring, the wheel axle passes through the adjusting groove and slides with it, the inner wall of the rotating ring is provided with a stop strip distributed along its circumference, and the outer wall of the adjusting cylinder is provided with a stop slot, the stop slot can be slidably engaged with the stop strip along the axial direction of the adjusting cylinder; the elastic element is arranged between the positioning ring and the rotating ring, and when the stop strip withdraws from the stop slot, the adjusting ring can rotate relative to the rotating ring.

[0012] Preferably, the extrusion die further comprises a transmission mechanism capable of transmission-connecting the adjustment ring and the internal thread ring, and when the adjustment ring rotates relative to the rotating ring, the transmission mechanism drives the internal thread ring to rotate relative to the external thread barrel.

[0013] Preferably, the outer circumferential surface of the adjustment ring is provided with active tooth grooves distributed along its circumference, and the outer circumferential surface of the internal threaded ring is provided with driven tooth grooves distributed along its circumference. The transmission mechanism includes a rotating rod rotatably arranged in a rolling bracket, and the transmission rod is provided with active racks and driven racks distributed along its circumference. When the stop bar withdraws from the stop groove, the active rack engages with the active tooth groove, and the driven rack engages with the driven tooth groove.

[0014] Preferably, the extrusion die is further provided with a wind pressure component, the wind pressure component has a wind pressure channel coaxial with the extrusion port, and the wind pressure component also includes annular air outlets for discharging materials at equal intervals along the wind pressure channel.

[0015] Preferably, the wind pressure assembly includes a wind pressure cylinder and a wind pressure ring. The wind pressure cylinder is arranged on the extrusion die and is coaxial with the extrusion port. The inner wall of the wind pressure cylinder is provided with a wind cavity, and the wind pressure cylinder is also provided with an air inlet pipe connected to the wind cavity; the wind pressure ring is arranged at equal intervals in the wind pressure cylinder, and the wind pressure ring is provided with ventilation openings distributed along its circumference, and the ventilation openings are connected to the air inlet pipe.

[0016] A processing device for a shock-absorbing rubber strip is applied to a processing technology for a shock-absorbing rubber strip, comprising an extruder and an extrusion die arranged at a discharge port of the extruder, the extrusion die having a central extrusion channel coaxial with the discharge port and an annular diameter-changing channel surrounding the central extrusion channel, the inner diameter of the annular diameter-changing channel being capable of being reduced, the molten material extruded from the annular diameter-changing channel being coated on the molten material from the central extrusion channel to form a rubber blank strip, and a rounding component for rounding the outer side of the rubber strip is also arranged at the discharge end of the extrusion die.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present application can change the diameter of the rubber strip by adjusting the inner diameter of the annular variable diameter channel, that is, adjusting the position of the extrusion plug in the extrusion port of the extrusion mold by the variable diameter drive assembly, which greatly reduces the frequent replacement of molds, effectively saves mold cost expenses, and avoids production downtime caused by mold replacement, thereby improving the overall utilization rate of the equipment and production continuity.

[0019] At the same time, in the actual continuous production process, when the diameter of the rubber strip needs to be changed temporarily, with the adjustable inner diameter of the annular variable diameter channel, the operator can fine-tune the diameter of the rubber strip in real time and accurately without stopping the machine, ensuring that the production process is always in the best state, producing qualified products that meet current needs, and enhancing the flexibility and controllability of the production process.

[0020] Adjusting the inner diameter of the annular variable diameter channel to control the diameter of the rubber strip can more accurately control the diameter of the rubber strip than traditional methods such as frequent mold replacement. It reduces the dimensional deviation caused by mold installation errors and human factors during the replacement process, so that the diameter of rubber strips produced in the same batch or even different batches can maintain a high degree of consistency, effectively ensuring the stability of product quality.

[0021] And through the continuous rolling friction of the rolling component, the outer side of the rubber strip can be finely rolled, aiming to further optimize the appearance of the rubber strip, making its circumference more regular and the surface smoother, meeting the requirements for the shape accuracy of the rubber strip during subsequent processing and product use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a stereoscopic diagram of a processing device for a shock-absorbing rubber strip of the present invention.

[0023] Figure 2 It is a three-dimensional cross-sectional view of a processing device for a shock-absorbing rubber strip of the present invention.

[0024] Figure 3 The present invention is a cross-sectional view of an extrusion die and a rounding component in a processing device for a shock-absorbing rubber strip.

[0025] Figure 4 yes Figure 3 A partial enlarged view of point A.

[0026] Figure 5 yes Figure 3 A partial enlarged view of point B.

[0027] Figure 6 yes Figure 3 A partial enlarged view of point C.

[0028] Figure 7 It is a stereoscopic diagram of a rounding component in a processing device for a shock-absorbing rubber strip of the present invention.

[0029] Figure 8 It is a three-dimensional exploded view of a rounding component in a processing device for a shock-absorbing rubber strip of the present invention.

[0030] Fig. 9 It is a stereoscopic diagram of an extrusion die in a processing device for a shock-absorbing rubber strip of the present invention.

[0031] Fig.10 It is a three-dimensional exploded view of an extrusion die in a processing device for a shock-absorbing rubber strip of the present invention.

[0032] Fig.11It is a three-dimensional exploded view of a wind pressure component in a processing device for a shock-absorbing rubber strip of the present invention.

[0033] The numbers in the figure are: 1, extruder; 2, extrusion die; 21, central extrusion channel; 22, annular variable diameter channel; 23, extrusion plug; 241, connecting frame; 242, adjusting rod; 243, external thread barrel; 244, internal thread ring; 2441, driven tooth groove; 245, driving ring; 3, rolling assembly; 31, rolling bracket; 32, rotating ring; 321, stopper strip; 33, rolling wheel; 331, wheel shaft; 341, servo motor; 342, Driven shaft; 343, driven gear; 344, synchronous transmission assembly; 35, slider; 36, adjusting ring; 361, adjusting cylinder; 3611, stop groove; 362, positioning ring; 363, active tooth groove; 37, elastic element; 4, transmission mechanism; 41, rotating rod; 411, active rack; 412, driven rack; 5, wind pressure assembly; 51, wind pressure cylinder; 511, wind cavity; 512, air inlet pipe; 52, wind pressure ring; 521, vent. DETAILED DESCRIPTION

[0034] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] like Figure 1 , Figure 2 and Figure 5 As shown, the present application provides a processing technology for shock-absorbing rubber strips, comprising the following steps: step one, feeding rubber pellets into an extruder 1, which melts the rubber pellets and extrude them into an extrusion die 2; step two, performing double-layer extrusion molding of rubber strips through the extrusion die 2; step three, performing rounding operation on the rubber strips; step four, cooling and molding the rubber strips; in step two, the extrusion die 2 has a central extrusion channel 21 coaxial with the discharge port of the extruder 1 and an annular variable diameter channel 22 surrounding the central extrusion channel 21, wherein the inner diameter of the annular variable diameter channel 22 can be reduced, and the molten material extruded from the annular variable diameter channel 22 is coated on the molten material from the central extrusion channel 21 to form a rubber strip; in step three, a rounding component 3 for rounding the outer side of the rubber strip is further provided at the discharge end of the extrusion die 2.

[0036] The processing technology of the shock-absorbing rubber strip is realized by a specially designed shock-absorbing rubber strip processing device, which is mainly composed of an extruder 1 and an extrusion die 2 arranged at the discharge port of the extruder 1. The extrusion die 2 includes a central extrusion channel 21 coaxial with the extrusion port, and is also provided with an annular variable diameter channel 22 surrounding the central extrusion channel 21. The inner diameter of the annular variable diameter channel 22 is adjustable and can be increased or decreased accordingly relative to the diameter of the central extrusion channel 21. In addition, a rounding component 3 for rounding the outer side of the rubber strip is also provided at the discharge end of the extrusion die 2. Through the coordinated cooperation between the various components, the entire processing process of the shock-absorbing rubber strip is completed.

[0037] First, the rubber pellets that have been pre-treated and meet the processing requirements are accurately fed into the extruder 1 according to the established feeding amount and feeding method. The heating system and the screw transmission device inside the extruder 1 start to work together. The heating system gradually heats the rubber pellets to their molten state by accurately controlling the temperature, while the screw transmission device relies on the reasonably set speed and torque to provide continuous and stable propulsion for the rubber material in the molten state, so that it can be smoothly squeezed into the extrusion mold 2 connected to it, laying the foundation for the subsequent molding operation in the mold.

[0038] The molten material entering the extrusion die 2 will flow into two different channels, the central extrusion channel 21 and the annular extrusion channel, respectively, according to the structural characteristics of the channels inside the die. Since the inner diameter of the annular variable diameter channel 22 can flexibly increase or decrease the diameter of the central extrusion channel 21, during the material extrusion process, the molten material extruded from the annular variable diameter channel 22 can be accurately coated on the molten material extruded from the central extrusion channel 21. After such a special fusion and coating process, a rubber blank with a specific structure and shape is initially formed.

[0039] The newly formed rubber strip will immediately enter the pre-set working area of ​​the rounding component 3 at the discharge end of the extrusion die 2. The rounding component 3 performs a fine rounding operation on the outer side of the rubber strip, aiming to further optimize the appearance of the rubber strip, making its circumference more regular and its surface smoother, so as to meet the requirements for the appearance accuracy of the rubber strip during subsequent processing and product use.

[0040] like Figure 3 and Figure 5As shown, the extrusion die 2 also has a buffer cavity connected to the discharge port of the extruder 1 and an extrusion port coaxial with the discharge port of the extruder 1, the extrusion port is in a conical shape, and an extrusion plug 23 capable of moving along its axial direction is arranged in the extrusion port, the extrusion plug 23 is hollow to form the central extrusion channel 21, and a conical surface is arranged at one end of the extrusion plug 23 away from the buffer cavity, and the annular variable diameter channel 22 is formed between the conical surface and the inner wall of the extrusion port, and a variable diameter driving component for driving the extrusion plug 23 to move relative to the extrusion die 2 is also arranged on the extrusion die 2.

[0041] The buffer cavity of the extrusion die 2 ensures that the molten rubber material from the extruder 1 can enter the buffer cavity smoothly and without leakage. The buffer cavity is designed to provide a transition space for the rubber material flowing out of the discharge port of the extruder 1, playing an important role in buffering and stabilizing the material flow rate and pressure.

[0042] When the rubber material enters the extrusion port, a portion of the material will flow forward along the central extrusion channel 21, providing a material basis for the subsequent molding of the core part inside the rubber strip. Another portion of the material will pass through the annular variable diameter channel 22 formed between the conical surface and the inner wall of the extrusion port. The width of the annular variable diameter channel 22 can be dynamically adjusted by the axial movement of the extrusion plug 23, thereby changing the thickness of the molten material extruded from the channel, and finally achieving effective control of the size of the rubber strip.

[0043] The variable diameter driving assembly can accurately drive the extrusion plug 23 to move along the axial direction of the extrusion port according to the actual production process requirements. The operator can operate the variable diameter driving assembly to make the extrusion plug 23 produce corresponding axial displacement, thereby changing the width of the annular variable diameter channel 22 and the coverage of the material around the central extrusion channel 21, thereby flexibly adjusting the forming diameter of the rubber billet.

[0044] like Figure 3 , Figure 4 , Fig. 9 and Fig.10As shown, the variable diameter drive assembly includes a connecting frame 241, an adjusting rod 242, an externally threaded barrel 243, an internally threaded ring 244 and a driving ring 245. The connecting frame 241 is slidably arranged in the buffer cavity along the axial direction of the extrusion port, and the extrusion plug 23 is fixedly connected to the connecting frame 241 at the end facing the buffer cavity; the adjusting rod 242 is distributed on the extrusion die 2 along the circumference of the extrusion port, and the adjusting rod 242 slides through the end face of the extrusion die 2 where the extrusion port is arranged, and the adjusting rod 242 is located at the end of the buffer cavity and is fixedly connected to the connecting frame 241; the externally threaded barrel 243 is arranged on the extrusion die 2 and is coaxial with the extrusion port; the internally threaded ring 244 is coaxially screwed on the externally threaded barrel 243; the driving ring 245 is coaxially rotatably connected to the internally threaded ring 244, and the end of the driving ring 245 away from the buffer cavity is fixedly connected to the adjusting ring 36.

[0045] When it is necessary to adjust the position of the extrusion plug 23 in the extrusion port to adjust the discharge thickness of the ring 36-shaped extrusion channel, the internal threaded ring 244 is rotated relative to the external threaded barrel 243. Under the action of the threaded engagement, the internal threaded ring 244 can be axially displaced relative to the external threaded barrel 243, and then the connecting frame 241 is guided to move in the buffer chamber through the adjusting ring 36 and the adjusting rod 242, so that the extrusion plug 23 connected to the connecting frame 241 can move in the extrusion port, thereby adjusting the inner diameter of the ring 36-shaped extrusion channel.

[0046] like Figure 3 , Figure 6 , Figure 7 and Figure 8 As shown, the rounding assembly 3 includes a rounding bracket 31, a rotating ring 32, a rounding wheel 33 and a rotating drive member. The rounding bracket 31 is arranged at the end of the extrusion die 2 where the extrusion port is arranged; the rotating ring 32 is rotatably arranged in the rounding bracket 31 and is coaxial with the extrusion port; the rounding wheel 33 is arranged along the circumference of the extrusion port at one end of the rotating ring 32 facing the extrusion port, the rounding wheel 33 is rotatably connected to the rotating ring 32, and the rounding wheel 33 is used to abut against the circumferential surface of the rubber blank strip for rounding; the rotating drive member is arranged on the rounding bracket 31 and is transmission-connected to the rotating ring 32.

[0047] The circumferential surface of the rotating ring 32 is provided with teeth distributed along its circumference, and the rotating driving part includes a servo motor 341 and a driven shaft 342. The servo motor 341 is arranged on the rolling bracket 31, and the driven shaft 342 is rotatably arranged on the rolling bracket 31. One end of the driven shaft 342 is provided with a driven gear 343 meshing with the teeth on the outer circumferential surface of the rotating ring 32, and the other end of the driven shaft 342 is provided with a synchronous transmission component 344 synchronously connected to the output shaft of the servo motor 341.

[0048] The rounding bracket 31 is precisely placed at the end position of the extrusion port of the extrusion die 2. As the basic supporting structure of the entire rounding assembly 3, it must have sufficient strength and stability to carry subsequent components and ensure that they always maintain an accurate relative position relationship during operation.

[0049] When the servo motor 341 is started, the output shaft of the servo motor 341 can transmit the torque to the rotating ring 32 through the synchronous transmission assembly 344, the driven shaft 342 and the driven gear 343, and then the rolling wheel 33 installed on the rotating ring 32 can rotate along the circumference of the rotating ring 32. Through continuous rolling friction, the rubber strip is precisely rolled, and its circumference gradually reaches the expected regularity, and the surface is smoother, which meets the established appearance standards of the product.

[0050] like Figure 8 As shown, the rotating ring 32 is provided with a slide groove distributed along its circumference, the slide groove extends along the radial direction of the rotating ring 32, a slider 35 is provided in the slide groove, the rounding wheel 33 has a wheel shaft 331 coaxial with the rounding wheel 33, one end of the wheel shaft 331 passes through the slider 35 and slidably cooperates with the rounding wheel 33; the rounding assembly 3 also includes an adjusting ring 36 and an elastic element 37, the adjusting ring 36 is coaxially rotatably arranged at one end of the adjusting disk facing the extrusion port, the inner circumferential surface of the adjusting ring 36 is provided with an adjusting cylinder 361 coaxial with the adjusting cylinder 361, the adjusting cylinder 361 passes through the inner wall of the rotating ring 32 and is provided with a positioning ring 362, The adjusting ring 36 is provided with adjusting grooves distributed along its circumference, and the adjusting grooves extend in a direction inclined to the radial direction of the adjusting ring 36. The wheel axle 331 passes through the adjusting grooves and slides with them. The inner wall of the rotating ring 32 is provided with stop strips 321 distributed along its circumference, and the outer wall of the adjusting cylinder 361 is provided with a stop groove 3611 that can be axially engaged with the stop strip 321 along the adjusting cylinder 361. The elastic element 37 is arranged between the positioning ring 362 and the rotating ring 32. When the stop strip 321 withdraws from the stop groove 3611, the adjusting ring 36 can rotate relative to the rotating ring 32.

[0051] In order to enable all the rolling wheels 33 to abut against rubber strips of different diameters, it is necessary to adjust the distance between the rolling wheels 33 and the axis of the rotating ring 32, that is, through the positioning ring 362, the positioning ring 362 overcomes the elastic force of the elastic element 37 and approaches the rotating ring 32, and when the stop strip 321 withdraws from the stop groove 3611, the adjusting ring 36 can rotate relative to the rotating ring 32. By rotating the adjusting ring 36 relative to the rotating ring 32, the rotation position of the wheel axle 331 is formed due to the rubber position of the sliding groove and the adjusting groove. When the adjusting groove rotates relative to the sliding groove, the wheel axle 331 can move along the radial direction of the rotating ring 32, thereby driving the rolling wheels 33 to abut against rubber strips of different diameters.

[0052] like Figure 4 and Figure 6As shown, the extrusion die also includes a transmission mechanism 4 capable of transmitting and connecting the adjustment ring 36 and the internal thread ring 244 . When the adjustment ring 36 rotates relative to the rotating ring 32 , the transmission mechanism 4 drives the internal thread ring 244 to rotate relative to the external thread barrel 243 .

[0053] When the adjustment ring 36 rotates relative to the rotating ring 32 in a predetermined direction and angle, due to the close and reasonable connection between the transmission mechanism 4, the adjustment ring 36 and the internal threaded ring 244, the transmission mechanism 4 will immediately respond to the rotational movement of the adjustment ring 36, and accurately transmit the rotational movement of the adjustment ring 36 to the internal threaded ring 244 based on its own mechanical transmission principle.

[0054] After the internal threaded ring 244 receives the rotational power transmitted from the transmission mechanism 4, it will be driven by the power to perform a corresponding rotational action relative to the external threaded cylinder 243 that cooperates with it, so as to ensure that the various components can cooperate with each other when the entire processing device is adjusted to extrude rubber strips of different diameters, thereby ensuring that the entire processing device can operate stably and efficiently, thereby providing strong mechanical action support for subsequent processing steps and other related processes.

[0055] like Figure 4 and Figure 6 As shown, the outer circumferential surface of the adjusting ring 36 is provided with active tooth grooves 363 distributed along its circumference, and the outer circumferential surface of the internal threaded ring 244 is provided with driven tooth grooves 2441 distributed along its circumference. The transmission mechanism 4 includes a rotating rod 41 rotatably arranged in the rolling bracket 31, and the transmission rod is provided with an active rack 411 and a driven rack 412 distributed along its circumference. When the stop bar 321 withdraws from the stop groove 3611, the active rack 411 engages with the active tooth groove 363, and the driven rack 412 engages with the driven tooth groove 2441.

[0056] When the stop bar 321 smoothly withdraws from the stop groove 3611 according to the predetermined mechanical action requirements, the transmission mechanism 4 enters the transmission working state. In this state, the active rack 411 on the rotating rod 41 will accurately mesh with the active tooth groove 363 on the outer circumferential surface of the adjustment ring 36, forming a tight and reliable connection relationship between the two, ensuring that the power can be smoothly transmitted from the adjustment ring 36 to the rotating rod 41; at the same time, the driven rack 412 will also accurately mesh with the driven tooth groove 2441 on the outer circumferential surface of the internal thread ring 244, so that the power received by the rotating rod 41 can continue to be transmitted to the internal thread ring 244, driving the internal thread ring 244 to perform a corresponding rotational action relative to the external thread cylinder 243, thereby ensuring that the transmission system of the entire processing device can operate in an orderly manner according to the established mechanical logic and realize the corresponding processing functions and action requirements.

[0057] like Figure 5 and Fig.11 As shown, in step 2, the rubber billet passes through the air pressure channel after extrusion, and the extrusion mold 2 is provided with an air pressure component 5, which has an air pressure channel coaxial with the extrusion port, and the air pressure component 5 also includes an annular air outlet for discharging materials at equal intervals along the air pressure channel.

[0058] The wind pressure assembly 5 has annular air outlets that are evenly spaced along the axial direction of the wind pressure channel. The purpose of these annular air outlets is to discharge the airflow evenly so that the rubber strip can be subjected to uniform and stable wind pressure when passing through the wind pressure channel. The force generated by the uniform wind pressure can "push" and "compact" the molten material in the annular variable diameter channel 22 onto the surface of the molten material extruded from the central extrusion channel 21, so that the two fit tightly and firmly.

[0059] In this ideal covering state, the separation of the two can be effectively avoided. If the wind pressure is uneven or missing, it is likely that the molten material extruded from the annular variable diameter channel 22 and the molten material of the central extrusion channel 21 will have a gap due to uneven force on each part, which will cause the separation of the two, which will seriously affect the structural integrity and performance of subsequent products.

[0060] like Fig.11 As shown, the wind pressure assembly includes a wind pressure cylinder 51 and a wind pressure ring 52. The wind pressure cylinder 51 is arranged on the extrusion die 2 and is coaxial with the extrusion port. The inner wall of the wind pressure cylinder 51 is provided with a wind cavity 511. The wind pressure cylinder 51 is also provided with an air inlet pipe 512 connected with the air cavity 511; the wind pressure ring 52 is arranged at equal intervals in the wind pressure cylinder 51, and the wind pressure ring 52 is provided with ventilation holes 521 distributed along its circumference, and the ventilation holes 521 are connected with the air inlet pipe 512.

[0061] The air pressure cylinder 51 is arranged on the extrusion die 2, and its position is coaxial with the extrusion port. This coaxial design ensures that the direction of subsequent air pressure transmission can be highly consistent with the direction of molten material extrusion, thereby creating good conditions for the molten material to be subjected to uniform and reasonable wind pressure during the extrusion process. On the inner wall of the air pressure cylinder 51, an air cavity 511 is arranged. The air cavity 511 can temporarily accommodate the airflow introduced from the outside and play a certain role in buffering and distributing the airflow. In addition, in order to enable the external airflow to smoothly enter the air cavity 511, an air inlet pipe 512 connected to the blower is specially arranged on the air pressure cylinder 51. A stable and reliable connection relationship is formed between the air inlet pipe 512 and the air cavity 511. The external airflow can flow into the air cavity 511 continuously through the air inlet pipe 512, providing sufficient air source guarantee for the subsequent generation and distribution of wind pressure.

[0062] The wind pressure ring 52 is arranged in an orderly manner in the wind pressure cylinder 51 at equal intervals. The purpose is to evenly redistribute the wind pressure along the axial direction inside the wind pressure cylinder 51, thereby ensuring the uniformity of the entire wind pressure field in space. On the wind pressure ring 52, there are vents 521 distributed along its circumference. The circumferential distribution of these vents 521 can make the airflow flowing in from the wind cavity 511 be evenly dispersed in the circumferential direction of the wind pressure ring 52, avoiding the situation where the local airflow is too strong or too weak. The vents 521 are interconnected with the air inlet pipe 512. In this way, the airflow entering the wind cavity 511 from the air inlet pipe 512 can be further evenly diffused at the wind pressure ring 52 through the vents 521, and finally form a stable and uniform wind pressure environment, so that the molten material can complete the corresponding process under the action of ideal wind pressure when passing through this area, such as achieving uniform coating and other operations, thereby ensuring that the quality of the product and the process effect meet the expected standards.

[0063] like Figure 1 , Figure 2 and Figure 5 As shown, a processing device for a shock-absorbing rubber strip comprises an extruder 1 and an extrusion die 2 arranged at a discharge port of the extruder 1, the extrusion die 2 having a central extrusion channel 21 coaxial with the extrusion port and an annular diameter-changing channel 22 surrounding the central extrusion channel 21, the inner diameter of the annular diameter-changing channel 22 can be increased or decreased relative to the diameter of the central extrusion channel 21, the molten material extruded from the annular diameter-changing channel 22 is coated on the molten material from the central extrusion channel 21 to form a rubber blank strip, and a rounding component 3 for rounding the outer side of the rubber strip is also arranged at the discharge end of the extrusion die 2.

[0064] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A processing technology for a shock-absorbing rubber strip, characterized in that: The steps include: Step 1: putting rubber pellets into an extruder (1), and the extruder (1) melts the rubber pellets and extrude them into an extrusion die (2); Step 2, performing double-layer extrusion molding of the rubber blank strip through an extrusion die (2); Step three, rounding the rubber strip; Step 4: Cooling and forming the rubber strip; In step 2, the extrusion die (2) comprises a central extrusion channel (21) coaxial with the discharge port of the extruder (1) and an annular diameter-changing channel (22) surrounding the central extrusion channel (21), wherein the inner diameter of the annular diameter-changing channel (22) can be reduced, and the molten material extruded from the annular diameter-changing channel (22) is coated on the molten material from the central extrusion channel (21) to form a rubber billet; In step three, a rounding component (3) for rounding the outer side of the rubber strip is also provided at the discharge end of the extrusion die (2).

2. The processing technology of a shock-absorbing rubber strip according to claim 1 is characterized in that: The extrusion die (2) further comprises a buffer cavity connected to the discharge port of the extruder (1) and an extrusion port coaxial with the discharge port of the extruder (1); the extrusion port is in the shape of a cone, and an extrusion plug (23) is arranged in the extrusion port and can move along its axial direction; the extrusion plug (23) is hollow to form the central extrusion channel (21); a conical surface is arranged at one end of the extrusion plug (23) away from the buffer cavity; the annular variable diameter channel (22) is formed between the conical surface and the inner wall of the extrusion port; and a variable diameter driving component for driving the extrusion plug (23) to move relative to the extrusion die (2) is also arranged on the extrusion die (2).

3. The processing technology of a shock-absorbing rubber strip according to claim 2 is characterized in that: The variable diameter driving assembly comprises a connecting frame (241), an adjusting rod (242), an externally threaded cylinder (243), an internally threaded ring (244) and a driving ring (245); the connecting frame (241) is slidably arranged in the buffer cavity along the axial direction of the extrusion port; the extrusion plug (23) is fixedly connected to the connecting frame (241) at the end facing the buffer cavity; The adjusting rod (242) is distributed on the extrusion die (2) along the circumference of the extrusion port, the adjusting rod (242) slides through the end surface of the extrusion die (2) where the extrusion port is arranged, and the adjusting rod (242) is located at the end of the buffer cavity and is fixedly connected to the connecting frame (241); The external threaded barrel (243) is arranged on the extrusion die (2) and is coaxial with the extrusion port; The internal thread ring (244) is coaxially screwed onto the external thread cylinder (243); The driving ring (245) is coaxially rotatably connected to the internal thread ring (244), and one end of the driving ring (245) facing away from the buffer cavity is fixedly connected to the adjusting ring (36).

4. The processing technology of a shock-absorbing rubber strip according to claim 3 is characterized in that: The rounding assembly (3) comprises a rounding support (31), a rotating ring (32), a rounding wheel (33) and a rotating driving member, wherein the rounding support (31) is arranged at the end of the extrusion die (2) where the extrusion port is arranged; The rotating ring (32) is rotatably disposed in the rounding bracket (31) and is coaxial with the extrusion port; A rounding wheel (33) is arranged along the circumference of the extrusion port at one end of the rotating ring (32) facing the extrusion port, the rounding wheel (33) is rotatably connected to the rotating ring (32), and the rounding wheel (33) is used to abut against the circumferential surface of the rubber blank strip to perform rounding; The rotary drive member is arranged on the rolling support (31) and is transmission-connected to the rotating ring (32).

5. The processing technology of a shock-absorbing rubber strip according to claim 4 is characterized in that: The rotating ring (32) is provided with sliding grooves distributed along its circumference, the sliding grooves extending along the radial direction of the rotating ring (32), a sliding block (35) is provided in the sliding grooves, the rolling wheel (33) has a wheel axle (331) coaxial with the rolling wheel (33), one end of the wheel axle (331) passes through the sliding block (35) and is slidably matched with the sliding block (35); The rounding assembly (3) further comprises an adjusting ring (36) and an elastic element (37). The adjusting ring (36) is coaxially rotatably arranged at one end of the rotating ring (32) facing the extrusion port. The inner circumferential surface of the adjusting ring (36) is provided with an adjusting cylinder (361) coaxial therewith. The adjusting cylinder (361) passes through the inner wall of the rotating ring (32) and is provided with a positioning ring (362). The adjusting ring (36) is provided with adjusting grooves distributed along its circumference. The adjusting grooves extend in a direction inclined to the radial direction of the adjusting ring (36). The wheel shaft (331) passes through the adjusting grooves and is slidably engaged therewith. The inner wall of the rotating ring (32) is provided with a stopper strip (321) distributed along its circumference. The outer wall of the adjusting cylinder (361) is provided with a stopper strip (3611). The stopper strip (3611) can be slidably engaged with the stopper strip (321) along the axial direction of the adjusting cylinder (361). The elastic element (37) is arranged between the positioning ring (362) and the rotating ring (32), and when the stop strip (321) withdraws from the stop groove (3611), the adjusting ring (36) can rotate relative to the rotating ring (32).

6. The processing technology of a shock-absorbing rubber strip according to claim 5, characterized in that: The extrusion die also includes a transmission mechanism (4) capable of transmitting and connecting the adjustment ring (36) and the internal thread ring (244); when the adjustment ring (36) rotates relative to the rotating ring (32), the transmission mechanism (4) drives the internal thread ring (244) to rotate relative to the external thread cylinder (243).

7. The processing technology of a shock-absorbing rubber strip according to claim 6, characterized in that: The outer circumferential surface of the adjusting ring (36) is provided with active tooth grooves (363) distributed along the circumference thereof, and the outer circumferential surface of the internal threaded ring (244) is provided with driven tooth grooves (2441) distributed along the circumference thereof. The transmission mechanism (4) comprises a rotating rod (41) rotatably arranged in the rolling bracket (31), and the transmission rod is provided with active racks (411) and driven racks (412) distributed along the circumference thereof. When the stop bar (321) withdraws from the stop groove (3611), the active rack (411) meshes with the active tooth groove (363), and the driven rack (412) meshes with the driven tooth groove (2441).

8. A processing technology for a shock-absorbing rubber strip according to any one of claims 2 to 7, characterized in that: The extrusion die (2) is also provided with a wind pressure assembly (5), which has a wind pressure channel coaxial with the extrusion port, and further comprises an annular air outlet for discharging materials at equal intervals along the wind pressure channel.

9. The processing technology of a shock-absorbing rubber strip according to claim 8, characterized in that: The wind pressure assembly (5) comprises a wind pressure cylinder (51) and a wind pressure ring (52); the wind pressure cylinder (51) is arranged on the extrusion die (2) and is coaxial with the extrusion port; an air cavity (511) is arranged on the inner wall of the wind pressure cylinder (51); and an air inlet pipe (512) connected to the air cavity (511) is also arranged on the wind pressure cylinder (51); The wind pressure ring (52) is arranged in the wind pressure cylinder (51) at equal intervals, and the wind pressure ring (52) is provided with ventilation openings (521) distributed along its circumference, and the ventilation openings (521) are connected to the air inlet pipe (512).

10. A processing device for a shock-absorbing rubber strip, applied to the processing technology for a shock-absorbing rubber strip according to claim 1, characterized in that: The invention comprises an extruder (1) and an extrusion die (2) arranged at a discharge port of the extruder (1); the extrusion die (2) comprises a central extrusion channel (21) coaxial with the discharge port and an annular diameter-changing channel (22) surrounding the central extrusion channel (21); the inner diameter of the annular diameter-changing channel (22) can be reduced; the molten material extruded from the annular diameter-changing channel (22) is coated on the molten material from the central extrusion channel (21) to form a rubber blank strip; and a rounding component (3) for rounding the outer side of the rubber strip is also arranged at the discharge end of the extrusion die (2).

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