Extruder for sealing strip production

Abstract

The invention relates to the technical field of extruders, and provides an extruder for sealing strip production, which comprises a machine body, a feed hopper, a rotating shaft, a spiral conveying blade and an extrusion die, the machine body is provided with an extrusion cavity, the extrusion cavity is provided with an inlet and an outlet, the extrusion cavity is in a circular truncated cone shape, the outlet is located at the small-diameter end of the extrusion cavity, the feed hopper is arranged on the machine body, and the rotating shaft is arranged on the machine body. The feeding hopper is used for conveying materials into the extrusion cavity, the rotating shaft is rotationally arranged in the extrusion cavity, the spiral conveying blade is arranged on the rotating shaft, the screw pitch of the spiral conveying blade is gradually increased from the end close to the outlet to the other end, and the extrusion opening mold is arranged at the outlet of the extrusion cavity. By means of the technical scheme, the problem that in the prior art, spiral conveying blades are prone to damage is solved.

Description

Technical Field

[0001] The invention relates to the technical field of extruders, and in particular to an extruder for producing sealing strips. Background Art

[0002] Sealing strips are a type of material used to prevent the penetration of air, water, dust, etc., and are widely used in doors and windows, automobiles, home appliances, construction, etc. The production of sealing strips is usually carried out using an extruder, which extrude the molten material into the desired shape and size.

[0003] However, in the production process of existing extruders, in order to ensure the density of materials and product quality, it is usually necessary to apply a particularly large extrusion force, which puts a great burden on the spiral conveying blades, often causing damage to the blades and increasing maintenance costs. Summary of the invention

[0004] The invention provides an extruder for producing sealing strips, which solves the problem in the prior art that spiral conveying blades are easily damaged.

[0005] The technical solution of the present invention is as follows: an extruder for producing sealing strips, comprising: The machine body has an extrusion cavity, the extrusion cavity has an inlet and an outlet, the extrusion cavity is truncated, and the outlet is located at the end of the extrusion cavity with a smaller diameter. A feed hopper, the feed hopper is arranged on the machine body, and the feed hopper is used to transport materials into the extrusion cavity, a rotating shaft, the rotating shaft being rotatably disposed in the extrusion chamber, A spiral conveying blade, wherein the spiral conveying blade is arranged on the rotating shaft, and the pitch of the spiral conveying blade gradually increases from one end close to the outlet to the other end. An extrusion die is arranged at the outlet of the extrusion cavity.

[0006] As a further technical solution, The extrusion port mold has an extrusion channel, which is divided into a feed transition section, a preforming section and a forming section in sequence. The preforming section is a rectangular parallelepiped of fixed size, and the forming section has a rectangular parallelepiped portion. The height of the rectangular parallelepiped portion is adjustable. When the height of the rectangular parallelepiped portion increases or decreases, the thickness of the extruded sealing strip increases or decreases.

[0007] As a further technical solution, The preforming section has an output end, and the extrusion die also has, a first forming plate, one end of which is arranged at one side of the output end, and the other end is a free end, and the first forming plate has two, the two first forming plates are arranged opposite to each other and are respectively located at the upper and lower sides of the output end, A second forming plate, one end of which is arranged at one side of the output end, and the other end is a free end, and the second forming plate has two, which are arranged opposite to each other and are respectively located at the left and right sides of the output end, The two first forming plates are located between the two second forming plates, the two side surfaces of the first forming plates are respectively in contact with the plate surfaces of the two second forming plates, and the two first forming plates and the two second forming plates form the forming section.

[0008] As a further technical solution, The first forming plate is divided into a deformation section and a parallel section from one end close to the output end to the free end, the parallel sections of the two first forming plates are parallel to each other, and the rectangular parallelepiped portion is formed between the parallel sections of the first forming plate and the second forming plate. Also includes, A driving assembly is arranged on the extrusion die. There are two driving assemblies, and the two driving assemblies are respectively used to drive the two first forming plates to move closer to or away from each other and then keep them in corresponding positions.

[0009] As a further technical solution, the driving assembly includes: A slider, wherein the slider is slidably disposed on the extrusion die, the sliding direction of the slider is parallel to the material flow direction at the parallel section, and the slider is located on one side of the first forming plate. A reinforcing rib plate, the reinforcing rib plate being arranged on the first forming plate, An adjusting screw, wherein the adjusting screw thread is arranged on the sliding block, one end of the adjusting screw is hinged to the reinforcing rib plate, and after the adjusting screw is rotated, the two first forming plates are moved closer to or farther from each other.

[0010] As a further technical solution, the drive assembly further includes: A first tightening screw, wherein the first tightening screw thread is arranged on the extrusion die, the first tightening screw is located at one side of the slider, and one end of the first tightening screw is used for tightening the slider.

[0011] As a further technical solution, The height of the rectangular parallelepiped portion is less than or equal to the height of the pre-formed section.

[0012] As a further technical solution, When the first forming plate and the second forming plate are in a naturally straightened state, the four inner surfaces of the forming section formed by the first forming plate and the second forming plate are respectively coplanar with the four inner surfaces of the pre-forming section. The first forming plate, the second forming plate and the output end are integrally formed.

[0013] As a further technical solution, The thickness of the deformation section gradually decreases from one end close to the output end to the other end.

[0014] As a further technical solution, it also includes: A second tightening screw, wherein the second tightening screw thread is arranged on the extrusion die, and the second tightening screw is used for tightening or canceling the tightening of the second forming plate. After the second tightening screw tightens the second forming plate, the two second forming plates clamp the two first forming plates.

[0015] The working principle and beneficial effects of the present invention are: In the present invention, the extrusion chamber of the machine body is in the shape of a truncated cone, and this design gives a unique advantage to the extrusion process of the material. When the material moves from the end of the extrusion chamber with a large diameter to the end with a small diameter, the space gradually shrinks, thereby generating a gradually increasing extrusion pressure on the material. This extrusion pressure helps the materials to be more tightly combined together, improving the density and quality of the sealing strip. On the other hand, the outlet is located at the end of the extrusion chamber with a smaller diameter, which can concentrate the extrusion pressure so that the material can be extruded at a higher speed and in a more uniform state at the outlet. The design of the spiral conveying blade is a perfect match for this process. The pitch gradually increases from one end close to the outlet to the other end, and the end with a small pitch is close to the end with a small diameter of the extrusion chamber. At the place where the diameter of the extrusion chamber is large, the accumulation of materials is relatively loose due to the relatively spacious space. At this time, the blade part with a larger pitch can quickly push the material to the place with a smaller diameter, realizing efficient material transmission. As the material gradually approaches the end with a smaller diameter, the space becomes narrower and the extrusion pressure rises sharply. At this stage, the blade part with a smaller pitch plays a key role, which can squeeze the material more tightly and ensure that the material is stably extruded to the outlet under strong pressure. In addition, the smaller pitch will increase the connection firmness between the spiral conveying blade and the rotating shaft, and can provide greater thrust without causing damage to the blade. The feed hopper continuously supplies materials to the extrusion chamber, providing a stable source of raw materials for the entire production process and ensuring the continuity of production. The extrusion die is set at the outlet to shape the extruded material. This overall design allows the material to undergo a process of gradual compression, orderly conveying and shaping during the extrusion process, greatly improving the production quality and efficiency of the sealing strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ; Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ; Figure 3 It is a right view structural schematic diagram of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the AA section structure; Figure 5 Schematic diagram of the three-dimensional structure of the extrusion die of the present invention Figure 1 ; Figure 6 Schematic diagram of the three-dimensional structure of the extrusion die of the present invention Figure 2 ; Figure 7 It is a schematic diagram of the right side structure of the extrusion die of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the BB cross-section structure; Fig. 9 For the present invention Figure 7 Schematic diagram of the CC cross-section structure; Fig.10 For the present invention Figure 7 Middle D is a schematic diagram of the partially enlarged structure; In the figure: 1-body, 11-extrusion chamber, 12-inlet, 13-outlet, 2-feed hopper, 31-rotating shaft, 32-spiral conveying blade, 4-extrusion die, 41-extrusion channel, 42-feed transition section, 43-preforming section, 431-output end, 44-forming section, 45-rectangular portion, 51-first forming plate, 52-second forming plate, 53-deformation section, 54-parallel section, 6-drive assembly, 61-slider, 62-reinforcement rib plate, 63-adjusting screw, 64-first tightening screw, 65-second tightening screw, 7-positioning scale. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0019] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0020] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] like Figure 1-10 As shown, the present invention proposes an extruder for producing sealing strips, including a body 1, a feed hopper 2, a rotating shaft 31, a spiral conveying blade 32 and an extrusion die 4, the body 1 has an extrusion cavity 11, the extrusion cavity 11 has an inlet 12 and an outlet 13, the extrusion cavity 11 is truncated, and the outlet 13 is located at the end of the extrusion cavity 11 with a smaller diameter, the feed hopper 2 is arranged on the body 1, the feed hopper 2 is used to convey materials into the extrusion cavity 11, the rotating shaft 31 is rotatably arranged in the extrusion cavity 11, the spiral conveying blade 32 is arranged on the rotating shaft 31, the pitch of the spiral conveying blade 32 gradually increases from one end close to the outlet 13 to the other end, and the extrusion die 4 is arranged at the outlet 13 of the extrusion cavity 11.

[0023] In this embodiment, Figure 4 and Figure 8As shown, the extrusion chamber 11 of the body 1 is in the shape of a truncated cone, and this design gives a unique advantage to the extrusion process of the material. When the material moves from the end with a larger diameter of the extrusion chamber 11 to the end with a smaller diameter, the space gradually shrinks, thereby generating a gradually increasing extrusion pressure on the material. This extrusion pressure helps the materials to be more tightly combined, improving the density and quality of the sealing strip. On the other hand, the outlet is located at the end with a smaller diameter of the extrusion chamber 11, which can concentrate the extrusion pressure so that the material can be extruded at a higher speed and in a more uniform state at the outlet. The design of the spiral conveying blade 32 is a perfect match for this process. The pitch gradually increases from one end close to the outlet to the other end, and the end with a smaller pitch is close to the end with a smaller diameter of the extrusion chamber 11. At the place where the diameter of the extrusion chamber 11 is larger, the material is relatively loosely piled up due to the relatively spacious space. At this time, the blade part with a larger pitch can quickly push the material to the place with a smaller diameter, realizing efficient material transmission. As the material gradually approaches the end with a smaller diameter, the space becomes narrower and the extrusion pressure rises sharply. At this stage, the blade part with a smaller pitch plays a key role, which can squeeze the material more tightly and ensure that the material is stably extruded to the outlet 13 under strong pressure. In addition, the smaller pitch will increase the connection firmness between the spiral conveying blade 32 and the rotating shaft 31, and can provide greater thrust without causing damage to the blade. The feed hopper 2 continuously supplies materials to the extrusion chamber 11, providing a stable source of raw materials for the entire production process and ensuring the continuity of production. The extrusion die 4 is set at the outlet 13 to shape the extruded material. This overall design allows the material to undergo a process of gradual compression, orderly conveying and shaping during the extrusion process, greatly improving the production quality and efficiency of the sealing strip.

[0024] Furthermore, the extrusion die 4 has an extrusion channel 41, which is divided into a feed transition section 42, a preforming section 43 and a forming section 44 in sequence. The preforming section 43 is a rectangular parallelepiped of fixed size, and the forming section 44 has a rectangular parallelepiped portion 45. The height of the rectangular parallelepiped portion 45 is adjustable. When the height of the rectangular parallelepiped portion 45 is increased or decreased, the thickness of the extruded sealing strip increases or decreases.

[0025] In this embodiment, Figure 8As shown, the extrusion channel 41 of the extrusion die 4 is carefully designed to be divided into a feed transition section 42, a preforming section 43 and a forming section 44 in sequence. The feed transition section 42 plays a vital role in the process of the material moving from the extrusion cavity 11 to the small diameter end. After the material is extruded from the outlet 13 of the extrusion cavity 11, its shape needs to smoothly transition from the shape of the truncated cone outlet to the shape of the input end of the preforming section 43. Due to the particularity of the material movement direction, the feed transition section 42 can ensure that this shape change process proceeds smoothly without blockage or poor flow. After the material enters the preforming section, this rectangular area of ​​fixed size provides a space for the material to be initially shaped. The material is initially shaped into a shape close to the sealing strip here, which is fully prepared for subsequent precise molding. The height-adjustable design of the rectangular part of the forming section 44 provides great flexibility for the production of sealing strips that meet different needs. The thickness of the sealing strip can be accurately adjusted according to the diverse needs of the market, so as to produce sealing strip products that meet various specifications.

[0026] Furthermore, the pre-forming section 43 has an output end 431, and the extrusion die 4 also has a first forming plate 51 and a second forming plate 52. One end of the first forming plate 51 is arranged on one side of the output end 431, and the other end is a free end. There are two first forming plates 51, and the two first forming plates 51 are arranged opposite to each other and are respectively located on the upper and lower sides of the output end 431. One end of the second forming plate 52 is arranged on one side of the output end 431, and the other end is a free end. There are two second forming plates 52, and the two second forming plates 52 are arranged opposite to each other and are respectively located on the left and right sides of the output end 431. The first forming plate 51 and the second forming plate 52 can be deformed after being subjected to external force. The two first forming plates 51 are located between the two second forming plates 52, and the two side surfaces of the first forming plate 51 are respectively attached to the plate surfaces of the two second forming plates 52. The two first forming plates 51 and the two second forming plates 52 form a forming section 44.

[0027] In this embodiment, Figure 8 As shown, at the output end 431 of the pre-forming section 43, two first forming plates 51 and two second forming plates 52 are provided. When the material moves from the end with a larger diameter to the end with a smaller diameter of the extrusion cavity 11 and passes through the pre-forming section 43, it enters the forming section 44 formed by the four forming plates. The first forming plate 51 and the second forming plate 52 have the characteristic of being deformable under the action of external force, which enables the distance between the two first forming plates 51 to be adaptively adjusted according to the actual required size of the sealing strip. The two first forming plates are located between the two second forming plates, and they fit tightly together to form a precise forming space. In this space, the material is further shaped, so that the shape of the sealing strip is more regular and the size is more precise, so that the sealing strip of the required size can be obtained, which is very convenient.

[0028] Furthermore, the first forming plate 51 is divided into a deformation section 53 and a parallel section 54 from one end close to the output end 431 to the free end. The parallel sections 54 of the two first forming plates 51 are parallel to each other. A rectangular portion 45 is formed between the parallel sections 54 of the first forming plates 51 and the second forming plates 52. The first forming plate 51 also includes a driving component 6. The driving component 6 is arranged on the extrusion die 4. The driving component 6 has two driving components 6. The two driving components 6 are respectively used to drive the two first forming plates 51 to move closer to or away from each other and then be fixed at corresponding positions.

[0029] In this embodiment, Figure 8 As shown, the first forming plate 51 is divided into a deformation section 53 and a parallel section 54. This design has important functions. When the material enters the forming section 44 from the pre-forming section 43, the deformation section 53 can guide the material to gradually adapt to the shape and size of the parallel section 54, reducing stress concentration and the generation of undesirable deformation. The parallel sections 54 of the two first forming plates 51 are parallel to each other, and a rectangular part 45 is formed between the parallel sections 54 and the second forming plate 52. This rectangular part 45 is the key area for the final forming of the sealing strip. By adjusting the distance between the parallel sections 54 of the two first forming plates 51, the thickness of the sealing strip can be accurately controlled.

[0030] The drive assembly 6 is provided to provide power and control means for adjusting the position of the first forming plate 51. The drive assembly 6 has two, which are respectively used to drive the two first forming plates 51 to move closer to or farther from each other and then fix them in corresponding positions. This design enables the operator to flexibly adjust the thickness of the sealing strip according to production requirements. For example, when a thicker sealing strip needs to be produced, the two first forming plates 51 can be moved away from each other by the drive assembly 6; when a thinner sealing strip needs to be produced, the two first forming plates 51 can be moved closer to each other.

[0031] Furthermore, the driving assembly 6 includes a slider 61, which is slidably set on the extrusion die 4, and the sliding direction of the slider 61 is parallel to the material flow direction at the parallel section 54. The slider 61 is located on one side of the first forming plate 51, and the reinforcing rib plate 62 is set on the first forming plate 51. The adjusting screw 63 is threadedly set on the slider 61, and one end of the adjusting screw 63 is hinged to the reinforcing rib plate 62. After the adjusting screw 63 is rotated, the two first forming plates 51 are closer to or farther away from each other.

[0032] In this embodiment, Figure 5As shown, the slider 61 in the drive assembly 6 is slidably arranged on the extrusion die 4, and its sliding direction is parallel to the material flow direction at the parallel section 54. In the process of the material moving from the end with a larger diameter to the end with a smaller diameter of the extrusion cavity 11 and entering the forming section 44, the slider 61, under the action of the drive assembly 6, provides stable support and guidance for the movement of the first forming plate 51, and the adjusting screw 63 is perpendicular to the sliding direction of the slider 61. The reinforcing rib plate 62 is arranged on the first forming plate 51, which greatly enhances the strength and stability of the first forming plate 51 to better ensure the parallel state of the parallel section 54. The adjusting screw 63 is threadedly arranged on the slider 61 and one end is hinged to the reinforcing rib plate 62. By rotating the adjusting screw 63, the distance between the two first forming plates 51 can be accurately controlled. In the process of material movement and forming, this design can adjust the size of the sealing strip at any time according to actual needs to ensure the dimensional accuracy and quality stability of the sealing strip.

[0033] Furthermore, the driving assembly 6 also includes a first tightening screw 64 , which is threadedly disposed on the extrusion die 4 , is located on one side of the slider 61 , and one end of the first tightening screw 64 is used to tighten the slider 61 .

[0034] In this embodiment, the first tightening screw 64 plays an important fixing role in the process of the material moving from the extrusion cavity 11 to the small diameter end and passing through the forming section 44. After the position of the first forming plate 51 is adjusted, the first tightening screw 64 tightens the slider 61 to ensure that the slider 61 will not move under the extrusion force of the material. This measure ensures the stability of the position of the first forming plate 51, thereby ensuring the consistency and stability of the size of the sealing strip. In the production process of the sealing strip, a stable forming plate position is crucial to ensuring product quality, and the existence of the first tightening screw 64 effectively solves this problem.

[0035] Further, the height of the rectangular parallelepiped portion 45 is less than or equal to the height of the pre-formed section 43 .

[0036] In this embodiment, Figure 8 As shown, the height of the rectangular part 45 of the forming section 44 is less than or equal to the height of the pre-forming section 43. This provision is of great significance in the process of the material moving from the end with a larger diameter to the end with a smaller diameter of the extrusion cavity 11 and entering the forming section 44. Combined with the particularity of the material movement direction, it can ensure that after the material enters the forming section 44 from the extrusion cavity 11, the extrusion will not be unstable or the shape will be deformed due to the excessive height of the forming section 44. Reasonable height restrictions enable the material to maintain a stable flow and forming state in the forming section 44. In the process of the material being subjected to a gradually increasing extrusion pressure, the height restriction of the forming section can effectively control the shape and size of the sealing strip and ensure the quality of the sealing strip.

[0037] Furthermore, when the first forming plate 51 and the second forming plate 52 are in a naturally straightened state, the four inner surfaces of the forming section 44 formed by the first forming plate 51 and the second forming plate 52 are respectively coplanar with the four inner surfaces of the pre-forming section 43, and the first forming plate 51, the second forming plate 52 and the output end 431 are integrally formed.

[0038] In this embodiment, in the process of the material moving from the extrusion cavity 11 to the small diameter end, this design can make the material transition more smoothly when entering the forming section 44 from the pre-forming section 43, reducing turbulence or stress concentration caused by surface discontinuity. The first and second forming plates are integrally formed with the output end, which greatly enhances the structural strength and stability of the forming plate. In the case where the material is subjected to a strong extrusion force, the integrally formed design can better withstand such pressure and ensure the forming quality of the sealing strip. In addition, the integrally formed design can achieve the absence of a connecting line at the connection between the first forming plate 51, the second forming plate 52 and the output end 431, so that a complete and integrated plane is formed in the process from the pre-forming section 43 to the forming section 44, preventing material blockage and residue. This design not only improves the production quality of the sealing strip, but also increases the reliability and durability of the equipment.

[0039] Furthermore, the thickness of the deformation section 53 gradually decreases from one end close to the output end 431 to the other end.

[0040] In this embodiment, Figure 8 As shown, the design of the gradually decreasing thickness of the deformation section 53 can, on the one hand, guide the deformation section 53 to undergo a gradual and gentle curve transition change when the driving component 6 drives the first forming plates 51 to move closer to or away from each other, thereby improving the smoothness of the material passing through the deformation section 53 and facilitating the passage of the material. On the other hand, it can improve the firmness of the connection between the first forming plate 51 and the output end 431 to prevent the risk of damage or breakage.

[0041] Furthermore, it also includes a second tightening screw 65, which is threadedly arranged on the extrusion die 4. The second tightening screw 65 is used to tighten or cancel the tightening of the second forming plate 52. After the second tightening screw 65 tightens the second forming plate 52, the two second forming plates 52 clamp the two first forming plates 51.

[0042] In this embodiment, the second tightening screw 65 plays an important fixing role in the process of the material moving from the extrusion cavity 11 to the small diameter end and passing through the forming section 44. After the second tightening screw 65 tightens the second forming plate 52, the two second forming plates 52 clamp the two first forming plates 51, further fixing the position of the forming plates. When the material is subjected to extrusion force, this fixing effect enhances the stability of the shape of the sealing strip during the extrusion process. It ensures that the sealing strip will not be deformed or displaced due to the extrusion force of the material during the molding process, thereby ensuring the quality of the sealing strip. The presence of the second tightening screw 65 provides additional stability guarantee for the production of the sealing strip.

[0043] Furthermore, the free ends of the two second forming plates 52 have positioning marks 7 , and the positioning marks 7 are used to determine the distance between the two first forming plates 51 .

[0044] In this embodiment, the free ends of the two second forming plates 52 have positioning marks 7. In the process of the material moving from the end with a larger diameter to the end with a smaller diameter of the extrusion cavity 11 and forming the sealing strip, the positioning marks 7 provide an intuitive reference for the operator to determine the distance between the two first forming plates 51. The operator can accurately adjust the position of the first forming plate 51 according to the positioning marks 7, thereby accurately controlling the thickness parameters of the sealing strip. In the complex production process, the presence of the positioning marks 7 improves the accuracy and efficiency of production, making the size adjustment of the sealing strip more convenient and reliable.

[0045] Furthermore, the cross-sectional shape of the feed transition section 42 changes gradually and smoothly from its input end to its output end, that is, changes from the shape of the outlet 13 to the shape of the input end of the pre-forming section 43 .

[0046] In this embodiment, this smooth transition is crucial for the process in which the material moves from the end with a larger diameter of the extrusion cavity 11 to the end with a smaller diameter and enters the extrusion die 4. It can ensure that the material will not experience turbulence, blockage, or stress concentration during the shape change process. In the process in which the material enters the extrusion die 4 from the outlet 13 of the extrusion cavity 11, the smoothly transitioned feed transition section ensures the smoothness of the material flow and reduces energy loss. This design improves production efficiency and the quality of the sealing strip, making the entire production process more stable and reliable.

[0047] Other explanations: The sealing strips mentioned above all refer to water-swelling waterproof rubber strips, and the body 1 is provided with a device for heating and melting the material in the extrusion cavity 11.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An extruder for producing sealing strips, characterized in that: include, A machine body (1), the machine body (1) having an extrusion chamber (11), the extrusion chamber (11) having an inlet (12) and an outlet (13), the extrusion chamber (11) being in the shape of a truncated cone, the outlet (13) being located at an end of the extrusion chamber (11) having a smaller diameter, a feed hopper (2), the feed hopper (2) being arranged on the machine body (1), the feed hopper (2) being used to transport materials into the extrusion chamber (11), a rotating shaft (31), the rotating shaft (31) being rotatably disposed in the extrusion chamber (11), a spiral conveying blade (32), wherein the spiral conveying blade (32) is arranged on the rotating shaft (31), and the pitch of the spiral conveying blade (32) gradually increases from one end close to the outlet (13) to the other end. An extrusion die (4), wherein the extrusion die (4) is arranged at an outlet (13) of the extrusion cavity (11).

2. The extruder for producing sealing strips according to claim 1, characterized in that: The extrusion die (4) has an extrusion channel (41), and the extrusion channel (41) is divided into a feed transition section (42), a preforming section (43) and a forming section (44) in sequence. The preforming section (43) is a rectangular parallelepiped with a fixed size. The forming section (44) has a rectangular parallelepiped portion (45). The height of the rectangular parallelepiped portion (45) is adjustable. When the height of the rectangular parallelepiped portion (45) is increased or decreased, the thickness of the extruded sealing strip increases or decreases.

3. The extruder for producing sealing strips according to claim 2, characterized in that: The preforming section (43) has an output end (431), and the extrusion die (4) further has: a first forming plate (51), one end of the first forming plate (51) being arranged on one side of the output end (431), and the other end being a free end, the first forming plate (51) comprising two, the two first forming plates (51) being arranged opposite to each other and respectively located on the upper and lower sides of the output end (431), a second forming plate (52), one end of the second forming plate (52) being arranged on one side of the output end (431), and the other end being a free end, the second forming plate (52) comprising two, the two second forming plates (52) being arranged opposite to each other and respectively located on the left and right sides of the output end (431), The two first forming plates (51) are located between the two second forming plates (52), and the two side surfaces of the first forming plate (51) are respectively in contact with the plate surfaces of the two second forming plates (52), and the two first forming plates (51) and the two second forming plates (52) form the forming section (44).

4. The extruder for producing sealing strips according to claim 3, characterized in that: The first forming plate (51) is divided into a deformation section (53) and a parallel section (54) from an end close to the output end (431) to a free end. The parallel sections (54) of the two first forming plates (51) are parallel to each other. The rectangular parallelepiped portion (45) is formed between the parallel sections (54) of the first forming plate (51) and the second forming plate (52). Also includes, A driving assembly (6), wherein the driving assembly (6) is arranged on the extrusion die (4), and the driving assembly (6) comprises two driving assemblies (6), and the two driving assemblies (6) are respectively used to drive the two first forming plates (51) to move closer to or farther from each other and then maintain them at corresponding positions.

5. The extruder for producing sealing strips according to claim 4, characterized in that: The driving assembly (6) comprises: a slider (61), the slider (61) being slidably disposed on the extrusion die (4), the sliding direction of the slider (61) being parallel to the material flow direction at the parallel section (54), the slider (61) being located on one side of the first forming plate (51), a reinforcing rib plate (62), wherein the reinforcing rib plate (62) is arranged on the first forming plate (51), An adjusting screw (63), wherein the adjusting screw (63) is threadedly disposed on the slider (61), and one end of the adjusting screw (63) is hingedly connected to the reinforcing rib plate (62). When the adjusting screw (63) is rotated, the two first forming plates (51) move closer to or farther from each other.

6. The extruder for producing sealing strips according to claim 5, characterized in that: The driving assembly (6) further comprises: A first tightening screw (64), wherein the first tightening screw (64) is threadedly disposed on the extrusion die (4), the first tightening screw (64) is located on one side of the slider (61), and one end of the first tightening screw (64) is used to tighten the slider (61).

7. The extruder for producing sealing strips according to claim 2, characterized in that: The height of the rectangular parallelepiped portion (45) is less than or equal to the height of the pre-formed section (43).

8. The extruder for producing sealing strips according to claim 4, characterized in that: When the first forming plate (51) and the second forming plate (52) are in a naturally straightened state, the four inner surfaces of the forming section (44) formed by the first forming plate (51) and the second forming plate (52) are respectively coplanar with the four inner surfaces of the pre-forming section (43). The first forming plate (51), the second forming plate (52) and the output end (431) are integrally formed.

9. The extruder for producing sealing strips according to claim 4, characterized in that: The thickness of the deformation section (53) gradually decreases from one end close to the output end (431) to the other end.

10. An extruder for producing sealing strips according to claim 3 or 4, characterized in that: Also includes, A second tightening screw (65), wherein the second tightening screw (65) is threadedly disposed on the extrusion die (4), and the second tightening screw (65) is used to tighten or cancel tightening of the second forming plate (52). After the second tightening screw (65) tightens the second forming plate (52), the two second forming plates (52) clamp the two first forming plates (51).

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