A pet double helix extrusion device

Abstract

This utility model discloses a PET double-helix extrusion device, including an extrusion cylinder, an adjusting groove and a feeding guide on the extrusion cylinder, a pretreatment chamber on the feeding guide, a fixed plate and an adjusting plate inside the extrusion cylinder, a power chamber on the left side of the fixed plate, a sliding connection between the bottom of the adjusting plate and the bottom of the extrusion cylinder, two helical extrusion shafts fixedly mounted on the right side of the adjusting plate, a cutting assembly mounted on the helical extrusion shaft, two first motors mounted on the left side of the adjusting plate, each first motor connected to one of the two helical extrusion shafts, a reciprocating assembly on the left side of the adjusting plate, and a cam assembly for driving the reciprocating assembly inside the power chamber. This utility model enables the adjusting plate to reciprocate left and right through the cam assembly and the reciprocating assembly, thereby driving the cutting assembly to perform cyclic cutting of the PET granule raw material, improving the cutting effect and efficiency of the PET granule raw material, and facilitating extrusion.

Description

Technical Field

[0001] This utility model relates to the field of PET processing equipment, and in particular to a PET twin-helix extrusion device. Background Technology

[0002] Polyethylene terephthalate (PET), chemical formula (C 10 H8O4) n It is produced by transesterification of dimethyl terephthalate with ethylene glycol or by esterification of terephthalic acid with ethylene glycol to synthesize diethyl terephthalate, followed by polycondensation. It is a crystalline saturated polyester, a milky white or light yellow, highly crystalline polymer with a smooth, glossy surface. It is a common resin in daily life and can be classified into APET, RPET, and PETG. It exhibits excellent physical and mechanical properties over a wide temperature range, with a service temperature up to 120℃. It has excellent electrical insulation properties, even at high temperatures and high frequencies, but its corona resistance is relatively poor. It also has good creep resistance, fatigue resistance, abrasion resistance, and dimensional stability.

[0003] Existing PET spiral extrusion devices often contain large plastic particles in the PET granules entering the extrusion cylinder, leading to material accumulation inside the cylinder and even clogging the feed inlet. This results in poor extrusion cylinder performance. Furthermore, insufficient temperature inside the cylinder can cause uneven mixing of the PET granules, resulting in poor PET molding and reduced product quality. Utility Model Content

[0004] The purpose of this invention is to solve the technical problems existing in the prior art and to provide a PET twin-helix extrusion device.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: a PET twin-helix extrusion device, including an extrusion cylinder, an adjusting groove and a feed guide on the extrusion cylinder, a pretreatment chamber on the feed guide, a fixed plate and an adjusting plate inside the extrusion cylinder, a power chamber on the left side of the fixed plate, a bottom of the adjusting plate slidably connected to the bottom of the extrusion cylinder, a mounting plate on the top of the adjusting plate located in the adjusting groove, a striking block on the mounting plate facing the feed guide, two spiral extrusion shafts fixedly mounted on the right side of the adjusting plate, a cutting assembly on the spiral extrusion shafts, two first motors on the left side of the adjusting plate, the two first motors respectively connected to the two spiral extrusion shafts, a reciprocating assembly on the left side of the adjusting plate, and a cam assembly for driving the reciprocating assembly inside the power chamber.

[0006] Preferably, a stirring shaft is installed inside the pretreatment chamber, a crushing rod is installed on the stirring shaft, an electric heating tube is installed on the inner wall of the pretreatment chamber, a second motor and a feeding pipe are installed on the pretreatment chamber, and the second motor is connected to the stirring shaft.

[0007] Preferably, the cutting assembly includes a plurality of spiral cutters surrounding the outer end of the spiral extrusion shaft, and a plurality of transverse cutters are also fixedly connected to the outer end of the spiral extrusion shaft.

[0008] Preferably, the reciprocating assembly includes a slide rod fixedly connected to the left side of the adjusting plate, the left end of the slide rod slidingly passing through the fixed plate to provide a push plate, and a spring being ringed on the slide rod, with the spring located between the fixed plate and the adjusting plate.

[0009] Preferably, the cam assembly includes a drive motor fixed to the rear wall of the power compartment, a camshaft connected to the drive motor, a cam on the camshaft, and the cam abutting against the push plate.

[0010] Preferably, a discharge port is provided at the right end of the extrusion cylinder, and a support foot is provided at the bottom of the extrusion cylinder.

[0011] The beneficial effects of this utility model are:

[0012] 1. This utility model uses a cam assembly and a reciprocating assembly to drive an adjusting plate to reciprocate left and right, thereby driving two spiral extrusion shafts to reciprocate left and right, which in turn drives the cutting assembly to perform cyclic cutting of PET granule raw materials, improving the cutting effect and efficiency of PET granule raw materials, facilitating extrusion and discharge, and increasing discharge efficiency.

[0013] 2. This utility model crushes and heats PET granules in a pretreatment chamber, making them easier to cut later. It also increases the temperature of the PET granules when they enter the extrusion cylinder, resulting in more uniform mixing and faster extrusion of the PET granules, thus improving the quality of the finished product.

[0014] 3. In this utility model, the reciprocating motion of the adjusting plate can drive the mounting plate and the striking block to circulate and strike the feed guide, thereby avoiding blockage of the feed guide and improving the extrusion efficiency of this utility model. Attached Figure Description

[0015] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0016] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0017] Figure 2 This is a top view schematic diagram of the two spiral extrusion shafts of this utility model;

[0018] Figure 3 This is a schematic diagram of the pretreatment chamber structure of this utility model.

[0019] Attached image captions:

[0020] 1-Extrusion cylinder, 2-Bolt extrusion shaft, 3-Spiral cutter, 4-Transverse cutter, 5-Feed conduit, 6-Pretreatment chamber, 7-Striking block, 8-Adjusting plate, 9-Adjusting chute, 10-Fixing plate, 11-Power chamber, 12-Cam, 13-Push plate, 14-Slide rod, 15-Spring, 16-First motor, 17-Discharge port, 18-Second motor, 19-Agitator shaft, 20-Crushing rod, 21-Electric heating tube, 22-Feeding pipe, 23-Mounting plate. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0025] Reference Figures 1-3According to a preferred embodiment of the present invention, a PET double helix extrusion device includes an extrusion cylinder 1, an outlet 17 at the right end of the extrusion cylinder 1, a support foot at the bottom of the extrusion cylinder 1, an adjusting groove 9 and a feed guide 5 on the extrusion cylinder 1, a pretreatment chamber 6 on the feed guide 5, a fixing plate 10 and an adjusting plate 8 inside the extrusion cylinder 1, a power chamber 11 on the left side of the fixing plate 10, a reciprocating assembly on the left side of the adjusting plate 8, and a cam assembly for driving the reciprocating assembly inside the power chamber 11. The cam assembly includes a drive motor fixed to the rear wall of the power chamber 11, a camshaft connected to the drive motor, a cam 12 on the camshaft, and the cam 12 abutting against a push plate 13.

[0026] Furthermore, the reciprocating assembly includes a slide rod 14 fixedly connected to the left side of the adjusting plate 8. The left end of the slide rod 14 slides through the fixed plate 10 and is provided with a push plate 13. A spring 15 is provided on the slide rod 14, and the spring 15 is fixedly connected between the fixed plate 10 and the adjusting plate 8.

[0027] Specifically, during use, the drive motor inside the power compartment 11 starts, driving the camshaft to rotate. The camshaft drives the cam 12 to rotate. As the cam 12 rotates, it pushes the push plate 13. The push plate 13 pushes the adjusting plate 8 to the left via the slide rod 14. As the adjusting plate 8 moves to the left, it stretches the spring 15. As the cam 12 rotates, the push plate 13 returns to its original position to the right under the elastic force of the spring 15. The push plate 13 drives the adjusting plate 8 to return to its original position to the right via the slide rod 14. Thus, the left and right reciprocating motion of the adjusting plate 8 is achieved through the cam assembly.

[0028] Furthermore, two spiral extrusion shafts 2 are fixedly installed on the right side of the adjusting plate 8, and a cutting assembly is installed on the spiral extrusion shaft 2. Two first motors 16 are installed on the left side of the adjusting plate 8. The two first motors 16 are respectively connected to the two spiral extrusion shafts 2. The cutting assembly includes several spiral cutters 3 surrounding the outer end of the spiral extrusion shaft 2, and several transverse cutters 4 are also fixedly connected to the outer end of the spiral extrusion shaft 2.

[0029] Specifically, the transverse cutter 4 is beneficial for cutting PET granules stuck between the spiral cutters 3. The spiral cutter 3 and the transverse cutter 4 work together to achieve better cutting results. In summary, during use, the left and right reciprocating motion of the adjusting plate 8 drives the cutting components on the two spiral extrusion shafts 2 to perform cyclic cutting of the PET granules, improving the cutting effect and efficiency of the PET granules, facilitating extrusion and improving discharge efficiency.

[0030] In this embodiment, the top of the adjusting plate 8 is located inside the adjusting groove 9 and is provided with an installation plate 23. The installation plate 23 is provided with a striking block 7, which is directly opposite the feed pipe 5. The pretreatment chamber 6 is provided with a stirring shaft 19, and a crushing rod 20 is provided on the stirring shaft 19. The inner wall of the pretreatment chamber 6 is provided with an electric heating tube 21. The pretreatment chamber 6 is provided with a second motor 18 and a feeding pipe 22. The second motor 18 is connected to the stirring shaft 19.

[0031] Specifically, during use, the crushing rod 20 on the stirring shaft 19 inside the pretreatment chamber 6 can crush the PET granules inside the pretreatment chamber 6. The crushing rod 20 can crush larger plastic granules, making them easier to extrude later, thereby improving the efficiency of PET extrusion. At the same time, the PET granule raw material is heated by the electric heating tube 21. Preheating reduces the hardness of the PET granule raw material, making it easier to cut later. Increasing the temperature of the PET granule raw material when it enters the extrusion cylinder 1 makes the PET granule raw material mix more evenly, and the extruded PET granule raw material is formed faster, improving the production quality of the product. The reciprocating adjustment plate 8 can drive the mounting plate 23 and the striking block 7 on the mounting plate 23 to circulate and strike the feed guide 5, thereby preventing the feed guide 5 from being blocked and improving the extrusion efficiency of this utility model.

[0032] Without causing conflict, those skilled in the art can freely combine and use the above-mentioned additional technical features.

[0033] The above description is only a preferred embodiment of the present utility model. Any technical solution that achieves the purpose of the present utility model by essentially the same means shall fall within the protection scope of the present utility model.

Claims

1. A PET twin-helix extrusion device, characterized in that: The device includes an extrusion cylinder, an adjusting chute and a feed guide, a pretreatment chamber on the feed guide, a fixed plate and an adjusting plate inside the extrusion cylinder, a power chamber on the left side of the fixed plate, a bottom sliding connection between the adjusting plate and the bottom of the extrusion cylinder, a mounting plate on the top of the adjusting plate located within the adjusting chute, a striking block on the mounting plate facing the feed guide, two spiral extrusion shafts fixedly mounted on the right side of the adjusting plate, a cutting assembly on the spiral extrusion shafts, two first motors on the left side of the adjusting plate connected to the two spiral extrusion shafts respectively, a reciprocating assembly on the left side of the adjusting plate, and a cam assembly for driving the reciprocating assembly inside the power chamber.

2. The PET twin-helix extrusion apparatus according to claim 1, characterized in that: The pretreatment chamber is equipped with a stirring shaft, a crushing rod, an electric heating tube on the inner wall of the pretreatment chamber, a second motor and a feeding pipe on the pretreatment chamber, and the second motor is connected to the stirring shaft.

3. The PET twin-helix extrusion apparatus according to claim 1, characterized in that: The cutting assembly includes several spiral cutters surrounding the outer end of the spiral extrusion shaft, and several transverse cutters are also fixedly connected to the outer end of the spiral extrusion shaft.

4. A PET twin-helix extrusion apparatus according to claim 1, characterized in that: The reciprocating assembly includes a slide rod fixedly connected to the left side of the adjusting plate. The left end of the slide rod slides through the fixed plate to set a push plate. A spring is ringed on the slide rod, and the spring is located between the fixed plate and the adjusting plate.

5. A PET twin-helix extrusion apparatus according to claim 4, characterized in that: The cam assembly includes a drive motor fixed to the rear wall of the power compartment, a camshaft connected to the drive motor, a cam on the camshaft, and the cam abutting against the push plate.

6. A PET twin-helix extrusion apparatus according to claim 1, characterized in that: The extrusion cylinder has a discharge port at the right end and a support foot at the bottom of the extrusion cylinder.

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