Machine head structure and extruder

Abstract

The utility model provides a machine head structure and extruder, the machine head structure includes: a first extrusion assembly, the first extrusion assembly has a first runner, the first runner includes a first glue inlet and a first glue outlet, the inner diameter of the first runner is gradually reduced along the direction of the first glue inlet close to the first glue outlet; the second extrusion assembly is connected with the first extrusion assembly, the second extrusion assembly is provided with a second runner, the second runner communicates with the first runner, the second runner comprises a second glue inlet and a second glue outlet, and the inner diameter of the second runner is gradually reduced in the direction, close to the second glue outlet, of the second glue inlet; and the first glue outlet is aligned with the second glue inlet. The extrusion structure disclosed by the utility model solves the technical problem of high glue outlet temperature caused by overlarge glue outlet pressure of the head of an extruder in the related art.

Description

Technical Field

[0001] The utility model relates to the technical field of tire tread winding rubber strip extrusion, in particular to a die head structure and an extruder. Background Art

[0002] When the engineering tire radial tire blank is continuously wound to form the tread, the rubber is pushed by the extrusion pressure and extruded through the cold feed extruder head device to form a rubber strip with a width and temperature that meets the process requirements.

[0003] When the existing die device works for a long time, the pressure accumulation effect of the extruder will cause the extrusion pressure of the die and pre-die to increase, causing the rubber to flow back in the barrel, thereby increasing the temperature of the rubber out, reducing the amount of rubber out, affecting the quality of the rubber out, and in severe cases damaging the equipment, causing serious economic losses.

[0004] Therefore, the prior art needs to be further developed. Utility Model Content

[0005] The purpose of the present invention is to overcome the above technical deficiencies and provide a die head structure and an extruder to solve the technical problem in the related art that the glue outlet temperature is high due to excessive glue outlet pressure of the extruder die head.

[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions: a head structure is provided, including: a first extrusion component, the first extrusion component has a first flow channel, the first flow channel includes a first glue inlet and a first glue outlet, and the inner diameter of the first flow channel gradually decreases along the direction from the first glue inlet to the first glue outlet; a second extrusion component, the second extrusion component is connected to the first extrusion component, the second extrusion component has a second flow channel, the second flow channel is connected to the first flow channel, the second flow channel includes a second glue inlet and a second glue outlet, and the inner diameter of the second flow channel gradually decreases along the direction from the second glue inlet to the second glue outlet; the first glue outlet is aligned with the second glue inlet.

[0007] Furthermore, the second extrusion assembly includes a third flow channel, the third flow channel is connected to the second flow channel, the third flow channel includes a third glue inlet and a third glue outlet, and the third glue inlet is aligned with the second glue outlet.

[0008] Furthermore, the third flow channel is a columnar structure.

[0009] Furthermore, the areas of any cross sections of the third flow channel along a direction perpendicular to the axis of the third flow channel are equal.

[0010] Furthermore, the first glue outlet and the second glue inlet have the same shape; and / or the second glue outlet and the third glue inlet have the same shape.

[0011] Furthermore, the second extrusion component includes a mounting portion, which is connected to the first extrusion component; a mounting groove is provided on the first extrusion component, which is arranged around the first glue outlet, and is used to fix the mounting portion.

[0012] Furthermore, the shape of any cross section of the first flow channel along the axial direction perpendicular to the first flow channel is the same as the shape of the first glue inlet; and / or the shape of any cross section of the second flow channel along the axial direction perpendicular to the second flow channel is the same as the shape of the second glue inlet.

[0013] An extruder device includes: the above-mentioned head structure; an extrusion structure, which is fixedly connected to the head structure, the extrusion structure has an extrusion channel, the extrusion channel is connected to a first flow channel, and the extrusion channel contains a rubber material to be extruded; an extrusion screw, which is rotatably arranged in the extrusion channel and is used to drive the rubber material to be extruded to flow toward the first flow channel.

[0014] Beneficial effects:

[0015] The die structure of the utility model can increase the flow space of the rubber material at the die head, reduce the pressure accumulation effect of the extruder, and reduce the extrusion pressure of the die head and pre-die in the prior art, thereby reducing the backflow of the rubber material in the barrel during the extrusion process, thereby reducing the glue discharge temperature of the rubber material and increasing the amount of rubber material discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the internal structure of the head structure used in the embodiment of the present utility model;

[0017] Figure 2 This is a structural diagram of the first extrusion assembly of the die head structure adopted in the embodiment of the present utility model;

[0018] Figure 3 yes Figure 2 Cross-section along AA direction;

[0019] Figure 4 Schematic diagram of the structure of the second extrusion assembly of the die head structure adopted in the embodiment of the present utility model;

[0020] Figure 5 yes Figure 4 Cross-section along BB direction;

[0021] Figure 6 yes Figure 4 Cross-section along CC direction;

[0022] Figure 7 It is a structural schematic diagram of the third flow channel of the head structure adopted in the embodiment of the present utility model.

[0023] The above drawings include the following reference numerals:

[0024] 1. First extrusion assembly; 11. First flow channel; 111. First glue inlet; 112. First glue outlet; 12. Mounting groove; 2. Second extrusion assembly; 21. Second flow channel; 211. Second glue inlet; 212. Second glue outlet; 22. Third flow channel; 221. Third glue inlet; 222. Third glue outlet; 23. Mounting portion. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0026] According to an embodiment of the present invention, a head structure is provided. Figures 1 to 7 , including: a first extrusion component 1, the first extrusion component 1 has a first flow channel 11, the first flow channel 11 includes a first glue inlet 111 and a first glue outlet 112, and the inner diameter of the first flow channel 11 gradually decreases along the direction of the first glue inlet 111 approaching the first glue outlet 112; a second extrusion component 2, the second extrusion component 2 is connected to the first extrusion component 1, the second extrusion component 2 has a second flow channel 21, the second flow channel 21 is connected to the first flow channel 11, the second flow channel 21 includes a second glue inlet 211 and a second glue outlet 212, and the inner diameter of the second flow channel 21 gradually decreases along the direction of the second glue inlet 211 approaching the second glue outlet 212; the first glue outlet 112 is aligned with the second glue inlet 211.

[0027] With the above-mentioned arrangement, the rubber to be extruded enters the first flow channel 11 through the first glue inlet 111 and flows from the first flow channel 11 to the second flow channel 21. Since the inner diameters of the first flow channel 11 and the second flow channel 21 gradually decrease along the direction of the colloid flow, there is a pressure accumulation effect of the colloid in the first flow channel 11 and the second flow channel 21. The arrangement of aligning the first glue outlet 112 with the second glue inlet 211 can make the transition between the first flow channel 11 and the second flow channel 12 more uniform, avoid the accumulation of rubber at the connection between the first flow channel 11 and the second flow channel 21, reduce the pressure accumulation effect, and thus reduce the backflow in the first flow channel 11 and the second flow channel 21 during the rubber extrusion process, thereby solving the technical problem of high glue discharge temperature caused by excessive glue discharge pressure of the extruder head in the related art.

[0028] In the nose structure of this embodiment, see Figure 1 、 Figure 7The second extrusion assembly 2 includes a third flow channel 22, which is connected to the second flow channel 21. The third flow channel 22 includes a third glue inlet 221 and a third glue outlet 222. The third glue inlet 221 is aligned with the second glue outlet 212. In this way, after passing through the first flow channel 11 and the second flow channel 21, the rubber enters the third flow channel 22, which precisely controls the shape of the rubber at the outlet.

[0029] Specifically, the second extrusion assembly 2 is an integrated structure of a pre-die and a die.

[0030] In the head structure of this embodiment, see FIG. Figure 1 、 Figure 7 The third flow channel 22 is a columnar structure. In this way, the rubber material enters the third flow channel 22 from the third rubber inlet 221 and is shaped in the third flow channel 22.

[0031] Specifically, the shape of the third glue outlet 222 can be set according to the shape required when the glue is extruded.

[0032] In the die head structure of this embodiment, the area of ​​any cross section of the third flow channel 22 perpendicular to the axis of the third flow channel 22 is equal. Thus, as the rubber material flows evenly through the third flow channel 22 toward the third discharge port 222, the pressure within the flow channel does not change dramatically because the flow channel area remains unchanged, allowing the rubber material to form plastics more smoothly within the third flow channel 22.

[0033] Specifically, since the shape of the third glue outlet 222 can be changed as needed, the shapes of the third glue inlet 221 and the third glue outlet 222 may be different, so the cross-sectional size of the third flow channel 22 remains unchanged to keep the third flow channel 22 changing evenly so that the glue will not generate additional pressure during the extrusion process.

[0034] In the nose structure of this embodiment, see Figures 1 to 4 The first glue outlet 112 and the second glue inlet 211 have the same shape; and / or the second glue outlet 212 and the third glue inlet 221 have the same shape. In this way, the rubber material evenly transitions at the connection between the first flow channel 11 and the second flow channel 21, and at the connection groove between the second flow channel 21 and the third flow channel 22. This reduces the pressure accumulation effect during the rubber extrusion process, thereby reducing the backflow of the rubber material within the first flow channel 11 and the second flow channel 21 during the extrusion process, and solves the technical problem of high glue discharge temperature caused by excessive glue discharge pressure in the extruder die head in the related art.

[0035] In the nose structure of this embodiment, see Figure 3 、 Figure 5 、 Figure 6The second extrusion assembly 2 includes a mounting portion 23 connected to the first extrusion assembly 1. The first extrusion assembly 1 is provided with a mounting groove 12, which is arranged around the first glue outlet 112 and is used to fix the mounting portion 23. In this way, the second extrusion assembly 2 is fixedly connected to the first extrusion assembly 1 through the mounting portion 23 and the mounting groove 12, thereby connecting the first flow channel 11 in the first extrusion assembly 1 and the second flow channel 21 in the second extrusion assembly 2, so that the first glue outlet 112 and the second glue inlet 211 are aligned.

[0036] Preferably, the shortest distance between the first glue inlet 111 and the first glue outlet 112 is 122 mm; the shortest distance between the second glue inlet 211 and the second glue outlet 212 is 69 mm; and the shortest distance between the third glue inlet 221 and the third glue outlet 222 is 6 mm. Thus, compared to the prior art, the length of the first flow channel 11 is shortened by approximately 22%, and the length of the second flow channel 21 is shortened by approximately 25%. Shortening the length of the rubber flowing in the first and second flow channels 11 and 21 effectively reduces the pressure accumulation effect of the extruder, thereby reducing backflow in the first and second flow channels 11 and 21 during rubber extrusion, thereby resolving the technical problem of high discharge temperature caused by excessive discharge pressure from the extruder die head in the prior art.

[0037] In the nose structure of this embodiment, see Figure 2 、 Figure 4 The shape of any cross section of the first flow channel 11 along the direction perpendicular to the axis of the first flow channel 11 is the same as the shape of the first glue inlet 111; and / or the shape of any cross section of the second flow channel 21 along the direction perpendicular to the axis of the second flow channel 21 is the same as the shape of the second glue inlet 211. In this way, the first flow channel 11 and the second flow channel 21 are both tapered flow channels. The shape of the cross sections of the first flow channel 11 and the second flow channel 21 remains unchanged, which can make the force on the rubber material more uniform when flowing in the first flow channel 11 and the second flow channel 12, reduce the pressure accumulation effect, and thus reduce the backflow in the first flow channel 11 and the second flow channel 21 during the rubber extrusion process, solving the technical problem of high glue discharge temperature caused by excessive glue discharge pressure in the extruder die head in the related art.

[0038] Preferably, the first glue outlet 112 , the second glue inlet 211 , the second glue outlet 212 , and the third glue inlet 221 are all elliptical, and the shape of the third glue outlet 222 can be set as needed.

[0039] Preferably, the long axis of the first glue outlet 112 and the second glue inlet 211 is 100 mm, and the short axis of the first glue outlet 112 and the second glue inlet 211 is 40 mm; the long axis of the second glue outlet 212, the third glue inlet 221, and the third glue outlet 222 is 65 mm, and the short axis of the second glue outlet 212, the third glue inlet 221, and the third glue outlet 222 is 6 mm. In this way, the first flow channel 11 and the second flow channel 21 are both elliptical cone structures. The use of a die head of this shape can increase the flow space of the rubber material at the die head, and the cross-sectional area of ​​the rubber material in the die head and the pre-die can be increased by about 1.66 times, which can reduce the pressure accumulation effect of the extruder. Compared with the original die head and pre-die, the extrusion pressure is lower, thereby reducing the backflow of the rubber material in the barrel during extrusion, thereby reducing the rubber material discharge temperature and increasing the rubber material discharge amount.

[0040] This embodiment provides an extruder device, including: a head structure; an extrusion structure, which is fixedly connected to the head structure, and has an extrusion channel, which is connected to the first flow channel 11, and contains a rubber material to be extruded; an extrusion screw, which is rotatably arranged in the extrusion channel and is used to drive the rubber material to be extruded to flow toward the first flow channel 11.

[0041] In this way, the extruder of this embodiment is equivalent to the prior art, and the right-angle transition of the rubber material at the front end of the head 51 mm is changed to an oblique angle, and the first rubber outlet 112 is aligned with the second rubber inlet 211, so that the rubber material can smoothly transition in the first flow channel 11 and the second flow channel 21, reducing the pressure accumulation effect of the extruder. Compared with the original head and pre-die, the extrusion pressure is lowered, thereby reducing the backflow of the rubber material in the barrel during the extrusion process, thereby reducing the rubber material discharge temperature and increasing the rubber material discharge amount.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0043] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0044] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0045] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0046] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A head structure, characterized in that: include: A first extrusion assembly (1), wherein the first extrusion assembly (1) has a first flow channel (11), the first flow channel (11) includes a first glue inlet (111) and a first glue outlet (112), and the inner diameter of the first flow channel (11) gradually decreases in a direction from the first glue inlet (111) to the first glue outlet (112); A second extrusion assembly (2), the second extrusion assembly (2) is connected to the first extrusion assembly (1), the second extrusion assembly (2) has a second flow channel (21), the second flow channel (21) is connected to the first flow channel (11), the second flow channel (21) includes a second glue inlet (211) and a second glue outlet (212), the inner diameter of the second flow channel (21) gradually decreases in a direction from the second glue inlet (211) to the second glue outlet (212); the first glue outlet (112) is aligned with the second glue inlet (211).

2. The head structure according to claim 1, characterized in that: The second extrusion assembly (2) comprises a third flow channel (22), the third flow channel (22) being in communication with the second flow channel (21), the third flow channel (22) comprising a third glue inlet (221) and a third glue outlet (222), the third glue inlet (221) being aligned with the second glue outlet (212).

3. The head structure according to claim 2, characterized in that: The third flow channel (22) is a columnar structure.

4. The head structure according to claim 3, characterized in that: The areas of any cross sections of the third flow channel (22) along a direction perpendicular to the axis of the third flow channel (22) are equal.

5. The head structure according to claim 4, characterized in that: The first glue outlet (112) and the second glue inlet (211) have the same shape; and / or, The second glue outlet (212) and the third glue inlet (221) have the same shape.

6. The head structure according to claim 1, characterized in that: The second extrusion assembly (2) comprises a mounting portion (23), and the mounting portion (23) is connected to the first extrusion assembly (1); The first extrusion assembly (1) is provided with a mounting groove (12), the mounting groove (12) being arranged around the first glue outlet (112), and the mounting groove (12) being used to fix the mounting portion (23).

7. The head structure according to claim 1, characterized in that: The shape of any cross section of the first flow channel (11) along a direction perpendicular to the axis of the first flow channel (11) is the same as the shape of the first glue inlet (111); and / or, The shape of any cross section of the second flow channel (21) along a direction perpendicular to the axis of the second flow channel (21) is the same as the shape of the second glue inlet (211).

8. An extruder, characterized in that include: The head structure according to any one of claims 1 to 7; An extrusion structure, wherein the extrusion structure is fixedly connected to the die head structure, the extrusion structure has an extrusion channel, the extrusion channel is connected to the first flow channel (11), and the rubber material to be extruded is contained in the extrusion channel; An extrusion screw is rotatably arranged in the extrusion channel, and the extrusion screw is used to drive the rubber material to be extruded to flow toward the first flow channel (11).

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