Double-screw extruder for producing hard PVC (polyvinyl chloride) pipe fittings

Abstract

The utility model discloses a double-screw extruder for producing hard PVC (polyvinyl chloride) pipe fittings, which comprises a base, and a processing table is fixedly connected to the top of the base. Materials are put into the feeding hopper, the second motor drives the first helical teeth to rotate, the first helical teeth drive the second helical teeth to rotate, the second helical teeth drive the rotating rod to rotate, the rotating rod drives the material screening rod to rotate, the material screening rod pushes the materials in the hopper to pass through the material screening plate, and the sizes of particles passing through the material screening plate are uniform. In the subsequent process, processing is easier, screened particles are conveyed into a feeding pipe, a first motor drives a spiral material pushing rod to enable the materials to continuously and evenly enter a double-screw extrusion assembly through a conveying pipe, production can be completed after the particles are subjected to operation such as heating forming, the beneficial effect of material screening is achieved, large-particle materials can be intercepted by a material screening plate, and the production efficiency is improved. The screw cannot participate in the processing process, the damage degree of the screw is reduced, the service life is prolonged, and the use stability of the extruder is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC pipe fittings, in particular to a twin-screw extruder for the production of rigid PVC pipe fittings. Background Technique

[0002] In modern industry and daily life, PVC pipe fittings are widely used in many fields such as building water supply and drainage, municipal engineering, and chemical industry because of their many advantages such as corrosion resistance, low cost, light weight, and convenient installation. With the acceleration of the urbanization process and the continuous advancement of infrastructure construction, the demand for PVC pipe fittings continues to grow, which puts higher requirements on the production technology and equipment of PVC pipe fittings. In the early stage of the production of rigid PVC pipe fittings, single-screw extruders were often used. However, the conveying and plasticizing capabilities of single-screw extruders are relatively limited, and the production efficiency is low, making it difficult to meet the needs of large-scale production. As the market's requirements for the output of PVC pipe fittings continue to increase, traditional single-screw extruders are gradually unable to adapt to the development of the industry.

[0003] During the process of pipe production, a twin-screw extruder is needed. During the processing process, uneven or oversized materials will cause additional wear on the screw. Under the rotation and extrusion of the screw, large-particle materials will cause scratching and impact on the surface of the screw, accelerating the wear of the screw. The thread shape and size of the screw may change, affecting its conveying and plasticizing capabilities, and reducing the use stability of the extruder.

[0004] Therefore, it is necessary to design and transform the extruder to effectively prevent the phenomenon of uneven particles. Content of the Utility Model

[0005] To solve the problems raised in the above background technique, the purpose of the present utility model is to provide a twin-screw extruder for the production of rigid PVC pipe fittings, which has the advantage of screening materials, and solves the problem that during the processing process, uneven or oversized materials will cause additional wear on the screw. Under the rotation and extrusion of the screw, large-particle materials will cause scratching and impact on the surface of the screw, accelerating the wear of the screw. The thread shape and size of the screw may change, affecting its conveying and plasticizing capabilities, and reducing the use stability of the extruder.

[0006] To achieve the above purpose, the present utility model provides the following technical solution: A twin-screw extruder for the production of rigid PVC pipe fittings, including a base, a processing table is fixedly connected to the top of the base, a twin-screw extrusion assembly is fixedly connected to the top of the processing table, a connecting plate is fixedly connected to the left side of the twin-screw extrusion assembly, an installation plate is fixedly connected to the left side of the connecting plate, a feeding mechanism is arranged on the top of the twin-screw extrusion assembly, and a material screening mechanism is arranged on the top of the connecting plate.

[0007] Preferably, the feeding mechanism includes a conveying pipe which is communicated with the left side of the top of the twin-screw extrusion assembly. The top of the conveying pipe is communicated with a feeding pipe. The bottom of the feeding pipe is fixedly connected to the top of a connecting plate. A first motor is fixedly connected to the left side of the feeding pipe. The output end of the first motor penetrates into the interior of the feeding pipe, and a spiral feeding rod is fixedly connected to the output end of the first motor.

[0008] Preferably, the material screening mechanism includes a feeding hopper. The bottom of the feeding hopper is communicated with the top of the feeding pipe. A second motor is fixedly connected to the top of the feeding hopper. A fixing plate is fixedly connected to the left side of the second motor. The output end of the second motor penetrates into the interior of the fixing plate, and a first helical gear is fixedly connected to the output end of the second motor. A second helical gear is meshed with the bottom of the first helical gear. A rotating rod is fixedly connected to the inner wall of the second helical gear. The rotating rod is movably connected to the fixing plate. A screening plate is fixedly connected to the inner wall of the feeding hopper. The screening plate is movably connected to the rotating rod. Screening rods are fixedly connected to the surface of the rotating rod, and the screening rods are located on the top of the screening plate.

[0009] Preferably, a stirring rod is fixedly connected to the bottom of the rotating rod, and the stirring rod is located at the bottom of the screening plate.

[0010] Preferably, reinforcing ribs are fixedly connected to the surface of the first motor, and the right side of the reinforcing ribs is fixedly connected to the left side of the feeding pipe.

[0011] Preferably, a support plate is fixedly connected to the surface of the twin-screw extrusion assembly, and the bottom of the support plate is fixedly connected to the top of the processing table.

[0012] Preferably, the screening rods are triangular in design, and the bottoms of the screening rods are in contact with the top of the screening plate.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. By starting the first motor and the second motor, and then putting the material into the feeding hopper, the second motor drives the first helical gear to rotate, the first helical gear drives the second helical gear to rotate, the second helical gear drives the rotating rod to rotate, the rotating rod drives the screening rods to rotate, and the screening rods push the material in the hopper through the screening plate. The particle sizes of the materials passing through the screening plate are relatively uniform and are more easily processed in the subsequent process. The screened particles are conveyed into the feeding pipe, and the first motor drives the spiral feeding rod to continuously and evenly feed the material into the twin-screw extrusion assembly through the conveying pipe. After the particles are formed by heating and other operations, the production of pipe fittings can be completed. It has the advantage of screening materials. Large-particle materials will be intercepted by the screening plate and will not participate in the processing process, reducing the damage degree of the screw and increasing the service life, effectively improving the use stability of the extruder.

[0015] 2. By setting up a feeding mechanism, the utility model can continuously and stably feed materials to the twin-screw extrusion assembly, avoiding too much one-time feeding, which may cause uneven processing of materials by the twin-screw extrusion assembly, and improving the use stability of the twin-screw extrusion assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the utility model;

[0017] Figure 2 is a perspective view of the feeding hopper of the utility model;

[0018] Figure 3 is a perspective view of the spiral feeding rod of the utility model;

[0019] Figure 4 is a perspective view of the screening rod of the utility model;

[0020] Figure 5 is a perspective view of the screening rod of the utility model.

[0021] In the figure: 1, base; 2, processing table; 3, twin-screw extrusion assembly; 4, connecting plate; 5, mounting plate; 6, feeding mechanism; 61, conveying pipe; 62, feeding pipe; 63, motor 1; 64, spiral feeding rod; 7, screening mechanism; 71, feeding hopper; 72, motor 2; 73, fixing plate; 74, helical gear 1; 75, helical gear 2; 76, rotating rod; 77, screening plate; 78, screening rod; 8, stirring rod; 9, reinforcing rib; 10, support plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] As Figures 1 to 5 shown, a twin-screw extruder for producing rigid PVC pipe fittings provided by the present utility model includes a base 1, a processing table 2 is fixedly connected to the top of the base 1, a twin-screw extrusion assembly 3 is fixedly connected to the top of the processing table 2, a connecting plate 4 is fixedly connected to the left side of the twin-screw extrusion assembly 3, a mounting plate 5 is fixedly connected to the left side of the connecting plate 4, a feeding mechanism 6 is arranged on the top of the twin-screw extrusion assembly 3, and a screening mechanism 7 is arranged on the top of the connecting plate 4.

[0024] Refer to Figure 2, the feeding mechanism 6 includes a conveying pipe 61, the conveying pipe 61 is communicated with the left side of the top of the twin-screw extrusion assembly 3, the top of the conveying pipe 61 is communicated with a feeding pipe 62, the bottom of the feeding pipe 62 is fixedly connected to the top of the connecting plate 4, and the left side of the feeding pipe 62 is fixedly connected with a first motor 63. The output end of the first motor 63 penetrates into the interior of the feeding pipe 62, and the output end of the first motor 63 is fixedly connected with a spiral pusher 64.

[0025] As a technical optimization scheme of the present invention, by providing the feeding mechanism 6, it is possible to continuously and stably feed the twin-screw extrusion assembly 3, avoiding too much one-time feeding, resulting in uneven processing of the material by the twin-screw extrusion assembly 3, and improving the use stability of the twin-screw extrusion assembly 3.

[0026] Reference Figure 5 , the screening mechanism 7 includes a feeding hopper 71, the bottom of the feeding hopper 71 is communicated with the top of the feeding pipe 62, the top of the feeding hopper 71 is fixedly connected with a second motor 72, the left side of the second motor 72 is fixedly connected with a fixing plate 73, the output end of the second motor 72 fixedly penetrates into the interior of the fixing plate 73, the output end of the second motor 72 is fixedly connected with a first helical gear 74, the bottom of the first helical gear 74 meshes with a second helical gear 75, the inner wall of the second helical gear 75 is fixedly connected with a rotating rod 76, the rotating rod 76 is movably connected to the fixing plate 73, the inner wall of the feeding hopper 71 is fixedly connected with a screening plate 77, the screening plate 77 is movably connected to the rotating rod 76, and the surface of the rotating rod 76 is fixedly connected with a screening rod 78, and the screening rod 78 is located on the top of the screening plate 77.

[0027] As a technical optimization scheme of the present invention, by providing the screening mechanism 7, it is possible to screen the material, avoiding large-particle materials from entering the twin-screw extrusion assembly 3, resulting in scratching and impact on the surface of the internal screw of the twin-screw extrusion assembly 3, and improving the use safety of the twin-screw extrusion assembly 3.

[0028] Reference Figure 5 , the bottom of the rotating rod 76 is fixedly connected with a stirring rod 8, and the stirring rod 8 is located at the bottom of the screening plate 77.

[0029] As a technical optimization scheme of the present invention, by providing the stirring rod 8, it is possible to stir the material, avoiding the material from getting stuck at the bottom of the feeding hopper 71, resulting in difficult normal feeding of the feeding hopper 71, and improving the use stability of the feeding hopper 71.

[0030] Reference Figure 3 , the surface of the first motor 63 is fixedly connected with a reinforcing rib 9, and the right side of the reinforcing rib 9 is fixedly connected to the left side of the feeding pipe 62.

[0031] As a technical optimization solution of the present utility model, by providing the reinforcing rib 9, the fixing strength between the first motor 63 and the feeding pipe 62 can be increased, preventing the first motor 63 from loosening after long-term use and resulting in the disconnection between the first motor 63 and the feeding pipe 62, thereby improving the service stability of the first motor 63.

[0032] Reference Figure 1 , a support plate 10 is fixedly connected to the surface of the twin-screw extrusion assembly 3, and the bottom of the support plate 10 is fixedly connected to the top of the processing table 2.

[0033] As a technical optimization solution of the present utility model, by providing the support plate 10, the twin-screw extrusion assembly 3 can be supported and fixed, preventing the twin-screw extrusion assembly 3 from shaking after long-term use and resulting in the disconnection between the twin-screw extrusion assembly 3 and the connecting plate 4, thereby improving the service stability of the twin-screw extrusion assembly 3.

[0034] Reference Figure 5 , the screening rod 78 is triangular in design, and the bottom of the screening rod 78 contacts the top of the screening plate 77.

[0035] As a technical optimization solution of the present utility model, by providing the triangular screening rod 78, it is convenient for materials to enter, preventing materials from accumulating on the top of the screening rod 78. At the same time, the materials blocked on the surface of the screening plate 77 can be pushed up, improving the use efficiency of the screening rod 78.

[0036] The working principle and usage process of the present utility model: When in use: When pipe fittings need to be produced, first start the first motor 63 and the second motor 72. Then, put the materials into the feeding hopper 71. The second motor 72 drives the first helical gear 74 to rotate, the first helical gear 74 drives the second helical gear 75 to rotate, the second helical gear 75 drives the rotating rod 76 to rotate, the rotating rod 76 drives the screening rod 78 to rotate, and the screening rod 78 pushes the materials in the hopper through the screening plate 77. The particle sizes of the particles passing through the screening plate 77 are relatively uniform and are more easily processed in the subsequent process. The screened particles are conveyed into the feeding pipe 62, and the first motor 63 drives the spiral pushing rod 64 to continuously and evenly convey the materials through the conveying pipe 61 into the twin-screw extrusion assembly 3. After the particles are formed by heating and other operations, the production of pipe fittings can be completed, thus having the advantage of screening materials.

[0037] In summary, for the twin-screw extruder used in the production of rigid PVC pipe fittings, through the combined use of the base 1, the processing table 2, the twin-screw extrusion assembly 3, the connecting plate 4, the mounting plate 5, the feeding mechanism 6, and the screening mechanism 7, it solves the problem that during the processing, uneven or oversized materials will cause additional wear to the screw. Under the rotation and extrusion of the screw, large particle materials will scratch and impact the surface of the screw, accelerating the wear of the screw. The thread shape and size of the screw may change, affecting its conveying and plasticizing capabilities, and reducing the use stability of the extruder.

[0038] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0039] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A twin-screw extruder for the production of rigid PVC pipe fittings, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected with a processing table (2), the top of the processing table (2) is fixedly connected with a twin-screw extrusion assembly (3), the left side of the twin-screw extrusion assembly (3) is fixedly connected with a connecting plate (4), the left side of the connecting plate (4) is fixedly connected with a mounting plate (5), a feeding mechanism (6) is arranged on the top of the twin-screw extrusion assembly (3), a screening mechanism (7) is arranged on the top of the connecting plate (4), the feeding mechanism (6) includes a conveying pipe (61), the conveying pipe (61) is communicated with the left side of the top of the twin-screw extrusion assembly (3), the top of the conveying pipe (61) is communicated with a feeding pipe (62), the bottom of the feeding pipe (62) is fixedly connected to the top of the connecting plate (4), the left side of the feeding pipe (62) is fixedly connected with a motor one (63), the output end of the motor one (63) penetrates into the interior of the feeding pipe (62), and the output end of the motor one (63) is fixedly connected with a spiral pushing rod (64). The screening mechanism (7) includes a feeding hopper (71), the bottom of the feeding hopper (71) is communicated with the top of the feeding pipe (62), the top of the feeding hopper (71) is fixedly connected with a motor two (72), the left side of the motor two (72) is fixedly connected with a fixing plate (73), the output end of the motor two (72) fixedly penetrates into the interior of the fixing plate (73), the output end of the motor two (72) is fixedly connected with a helical gear one (74), the bottom of the helical gear one (74) meshes with a helical gear two (75), the inner wall of the helical gear two (75) is fixedly connected with a rotating rod (76), the rotating rod (76) is movably connected with the fixing plate (73), the inner wall of the feeding hopper (71) is fixedly connected with a screening plate (77), the screening plate (77) is movably connected with the rotating rod (76), and the surface of the rotating rod (76) is fixedly connected with a screening rod (78), and the screening rod (78) is located above the screening plate (77).

2. The twin-screw extruder for producing rigid PVC pipe fittings according to claim 1, characterized in that: The bottom of the rotating rod (76) is fixedly connected with a stirring rod (8), and the stirring rod (8) is located below the screening plate (77).

3. A twin-screw extruder for the production of rigid PVC pipe fittings according to claim 1, characterized in that: The surface of the motor one (63) is fixedly connected with a reinforcing rib (9), and the right side of the reinforcing rib (9) is fixedly connected to the left side of the feeding pipe (62).

4. A twin-screw extruder for producing rigid PVC pipe fittings according to claim 1, characterized in that: The surface of the twin-screw extrusion assembly (3) is fixedly connected with a support plate (10), and the bottom of the support plate (10) is fixedly connected to the top of the processing table (2).

5. A twin-screw extruder for the production of rigid PVC pipe fittings according to claim 1, characterized in that: The screening rod (78) is designed in a triangular shape, and the bottom of the screening rod (78) contacts the top of the screening plate (77).

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