Smelting polycondensation equipment for PVC (polyvinyl chloride) processing
By using double helix mechanism and support shock absorbing components in the melting and polycondensation equipment of PVC heat shrink tubes, the problems of poor melting and mixing capabilities and insufficient stability in existing equipment are solved, and higher quality PVC heat shrink tube production and equipment service life are achieved.
Patent Information
- Application Number
- CN202422175688.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-05
AI Technical Summary
During the smelting and polycondensation process, the existing PVC heat shrink tube has poor smelting mixing ability, resulting in low transparency of the PVC heat shrink tube after forming and has surface defects such as analysis crystal point; at the same time, the equipment lacks shock absorption mechanism, resulting in poor stability and service life.
The double-helical rod mechanism and a support shock absorbing assembly are adopted. The double-helical rod mechanism drives the spiral blades to rotate through the first and second rotating rods to achieve sufficient heating, mixing and compression of raw materials; the support shock absorbing assembly includes a damping rod and a shock absorbing spring to reduce vibration during the operation of the equipment.
The raw material mixing uniformity of PVC heat shrink tubes is improved to meet production demand standards; at the same time, the stability and service life of the equipment are improved by reducing equipment vibration.
Smart Images
Figure CN223013616U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of PVC processing, in particular to a smelting and polycondensation device for PVC processing. Background Art
[0002] Polyvinyl chloride plastic is polymerized from vinyl chloride monomers and is one of the commonly used thermoplastic plastics. Its trade name is simply referred to as "chloroplastics", and its English abbreviation is PVC.
[0003] PVC heat shrinkable tube is a kind of pipe made of polyvinyl chloride material through processing. It has good insulation, corrosion resistance and high temperature resistance, and is widely used in the protection of wires and cables, pipe connection and the production of various seals and other fields. When using the PVC heat shrinkable tube, it is sleeved on the object to be protected. It has the special function of shrinking when heated. It can shrink when heated to above 95°C, which is convenient to use. It is used for the outer sheath of electrolytic capacitors, inductive components, battery monomers and battery packs. The product has good high temperature resistance and no secondary shrinkage.
[0004] However, in the production process of PVC heat shrinkable tubes, smelting and polycondensation is one of the key steps, which directly affects the quality and performance of the final product. However, in the existing technology, the smelting compression screw is a single screw with a relatively low length-diameter ratio, and its ability to smelt and mix various raw materials is poor, resulting in insufficient and uneven mixing of the extruded materials during the production process. The formed PVC heat shrinkable tube has low transparency and surface defects such as partial component precipitation crystal points.
[0005] At the same time, when the smelting and polycondensation treatment is carried out in the production process of PVC heat shrinkable tubes, the equipment will generate a large amount of vibration. However, in the existing technology, the processing equipment lacks a certain shock absorption mechanism, resulting in a decline in the stability and service life of the equipment, and there are certain defects. Summary of the Invention
[0006] The technical problem to be solved by the utility model is that when the existing PVC heat shrinkable tubes are subjected to smelting and polycondensation treatment of raw materials, the smelting and mixing ability is poor, and the extruded materials are not mixed sufficiently and evenly, which affects the quality of the formed PVC heat shrinkable tubes; at the same time, there is a lack of a shock absorption mechanism, resulting in poor stability of the equipment and a short service life.
[0007] To solve the above technical problems, the technical solution adopted by the present utility model is as follows: A smelting and polycondensation device for PVC processing, comprising a smelting cylinder body, a feed inlet is fixedly communicated with the top of the smelting cylinder body, a discharge outlet is fixedly communicated with the bottom of the smelting cylinder body, a support plate is fixedly connected to one side of the smelting cylinder body, a motor is fixedly installed on the support plate, a first rotating rod passing through the smelting cylinder body is provided at the output end of the motor, a first spiral blade located inside the smelting cylinder body is fixedly connected to the first rotating rod, a second rotating rod symmetrically arranged with the first rotating rod penetrates through the smelting cylinder body, a second spiral blade located inside the smelting cylinder body is fixedly connected to the second rotating rod and the second spiral blade cooperates with the first spiral blade, a first gear is fixedly connected to one end of the first rotating rod, a second gear meshing with the first gear is fixedly connected to one end of the second rotating rod, a plurality of support and shock absorption components are fixedly connected to the bottom of the smelting cylinder body, and a plurality of annular heating tubes are installed on the inner wall of the smelting cylinder body.
[0008] As a further improvement of the present utility model, the feed inlet and the discharge outlet are respectively located at both ends of the smelting cylinder body.
[0009] As a further improvement of the present utility model, both ends of the first rotating rod are rotatably connected to the smelting cylinder body through first bearings, and both ends of the second rotating rod are rotatably connected to the smelting cylinder body through second bearings.
[0010] As a further improvement of the present utility model, the support and shock absorption component includes a support column arranged at the bottom of the smelting cylinder body and fixedly connected thereto, a support sleeve is sleeved on the lower part of the support column and is slidably connected thereto, a fixing groove for the support column to slide is provided inside the support sleeve, and the bottom of the support column and the bottom wall of the support sleeve are connected by a damping rod and a shock absorption spring located in the fixing groove.
[0011] As a further improvement of the present utility model, the bottom of the support sleeve is fixedly connected with a circular mounting plate, and a plurality of uniformly distributed mounting holes are provided on the circular mounting plate.
[0012] As a further improvement of the present utility model, guide sliders are fixedly connected to both sides of the bottom end of the support column, and guide chutes for the guide sliders to slide are provided on the side wall of the support sleeve.
[0013] As a further improvement of the present utility model, the shock absorption spring is sleeved outside the damping rod.
[0014] The beneficial effects of the present utility model: The present utility model adopts a double-screw rod mechanism, which can fully heat, mix and compress the raw materials of the PVC heat-shrinkable tube, so that the output melt meets the production requirement standards; at the same time, a support and shock absorption component is provided, which can reduce the vibration during the operation of the equipment, and improve the stability and service life of the equipment. Description of the Drawings
[0015] Figure 1 is the overall structural schematic diagram of a melting and polycondensation device for PVC processing according to the present utility model;
[0016] Figure 2 is a melting and polycondensation device for PVC processing according to the present utility model Figure 1 partial sectional view;
[0017] Figure 3 is the partial structural schematic diagram of a melting and polycondensation device for PVC processing according to the present utility model;
[0018] Figure 4 is the partial sectional view of the support and shock absorption assembly of a melting and polycondensation device for PVC processing according to the present utility model.
[0019] As shown in the figure: 1. Melting cylinder; 2. Feed inlet; 3. Discharge outlet; 4. Support plate; 5. Motor; 6. First rotating rod; 7. First spiral blade; 8. Second rotating rod; 9. Second spiral blade; 10. First gear; 11. Second gear; 12. Support and shock absorption assembly; 12.1. Support column; 12.2. Support sleeve; 12.3. Fixed groove; 12.4. Damping rod; 12.5. Shock absorption spring; 12.6. Circular mounting plate; 12.7. Mounting hole; 12.8. Guide slider; 12.9. Guide chute; 13. First bearing; 14. Second bearing; 15. Annular heating tube. Specific embodiments
[0020] The orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned in this specification are defined relative to its structure, and they are relative concepts. Therefore, it is possible to change accordingly according to its different positions and different usage states; so, these or other orientation terms should not be interpreted as restrictive terms.
[0021] The singular forms of "a", "the" and "said" used in this specification are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following further details this application in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are only used to explain this application and are not used to limit this application.
[0023] The present utility model provides as attached Figures 1-4A smelting and polycondensation device for PVC processing as shown in the figure, including a smelting cylinder 1. A feed inlet 2 is fixedly communicated with the top of the smelting cylinder 1, and a discharge outlet 3 is fixedly communicated with the bottom of the smelting cylinder 1. It is characterized in that: a support plate 4 is fixedly connected to one side of the smelting cylinder 1, a motor 5 is fixedly installed on the support plate 4, a first rotating rod 6 passing through the smelting cylinder 1 is provided at the output end of the motor 5, a first spiral blade 7 located inside the smelting cylinder 1 is fixedly connected to the first rotating rod 6, a second rotating rod 8 symmetrically arranged with the first rotating rod 6 penetrates through the smelting cylinder 1, a second spiral blade 9 located inside the smelting cylinder 1 is fixedly connected to the second rotating rod 8 and the second spiral blade 9 cooperates with the first spiral blade 7, a first gear 10 is fixedly connected to one end of the first rotating rod 6, a second gear 11 meshing with the first gear 10 is fixedly connected to one end of the second rotating rod 8, a plurality of support and shock-absorbing components 12 are fixedly connected to the bottom of the smelting cylinder 1, and a plurality of annular heating pipes 15 are installed on the inner wall of the smelting cylinder 1.
[0024] As Figure 2 and Figure 3 shown, in the present utility model, the feed inlet 2 and the discharge outlet 3 are respectively located at both ends of the smelting cylinder 1. Both ends of the first rotating rod 6 are rotatably connected to the smelting cylinder 1 through first bearings 13, and both ends of the second rotating rod 8 are rotatably connected to the smelting cylinder 1 through second bearings 14, which improves the stability of the first rotating rod 6 and the second rotating rod 8 during rotation.
[0025] As Figure 4 shown, in the present utility model, the support and shock-absorbing component 12 includes a support column 12.1 arranged at the bottom of the smelting cylinder 1 and fixedly connected thereto. A support sleeve 12.2 is sleeved on the lower part of the support column 12.1 and is slidably connected thereto. A fixing groove 12.3 for the support column 12.1 to slide is provided inside the support sleeve 12.2, and the bottom of the support column 12.1 and the bottom wall of the support sleeve 12.2 are connected through a damping rod 12.4 and a shock-absorbing spring 12.5 located in the fixing groove 12.3. A circular mounting plate 12.6 is fixedly connected to the bottom of the support sleeve 12.2, and a plurality of uniformly distributed mounting holes 12.7 are provided on the circular mounting plate 12.6. It can be fixed on the ground or platform through the mounting holes 12.7 on the circular mounting plate 12.6 to improve its stability. Guide sliders 12.8 are fixedly connected to both sides of the bottom end of the support column 12.1, and guide chutes 12.9 for the guide sliders 12.8 to slide are provided on the side wall of the support sleeve 12.2, which improves the stability of the support column 12.1 and the support sleeve 12.2. The shock-absorbing spring 12.5 is sleeved on the outside of the damping rod 12.4. The damping rod 12.4 and the shock-absorbing spring 12.5 form a shock-absorbing mechanism, and the cooperation of the damping rod 12.4 and the shock-absorbing spring 12.5 can achieve a shock-absorbing effect.
[0026] Working principle: When the present utility model is specifically implemented, first, the PVC heat-shrinkable tube raw material is added into the melting cylinder 1 through the feeding port 2. Then, the motor 5 is controlled to start, driving the first rotating rod 6 to rotate. The rotation of the first rotating rod 6 drives the first gear 10 to rotate. The first gear 10 drives the second rotating rod 8 to rotate through the second gear 11 meshing with it. When the first rotating rod 6 and the second rotating rod 8 rotate, they will respectively drive the first spiral blade 7 and the second spiral blade 9 fixedly connected to them to rotate. And the annular heating tube 15 is controlled to heat the raw material inside the melting cylinder 1, so as to realize the heating, mixing and compressing of the raw material. And through the cooperation of the first spiral blade 7 and the second spiral blade 9, the raw material can be conveyed to the other end. Finally, the raw material after melting and polycondensation treatment is output through the discharge port 3.
[0027] When the motor 5 starts to operate, a large amount of vibration will be generated, causing the melting cylinder 1 to shake, thus affecting its stability and service life. Therefore, before use, bolts or screws can be used to pass through the mounting holes 12.7 on the circular mounting plate 12.6 to fix it on the ground or platform. When the motor 5 operates again, the motor 5 starts to make the melting cylinder 1 shake. At this time, the damping rod 12.4 and the shock-absorbing spring 12.5 connected between the bottom of the support column 12.1 and the bottom wall of the support sleeve 12.2 cooperate with each other to play a shock-absorbing role, so as to reduce the shaking of the melting cylinder 1, and further improve its stability and service life.
[0028] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims
1. A melting and polycondensation device for PVC processing, comprising a melting cylinder (1), wherein the top of the melting cylinder (1) is fixedly connected to a feed inlet (2), and the bottom of the melting cylinder (1) is fixedly connected to a discharge outlet (3), characterized in that: A support plate (4) is fixedly connected to one side of the smelting cylinder (1), and a motor (5) is fixedly mounted on the support plate (4). An output end of the motor (5) is provided with a first rotating rod (6) passing through the smelting cylinder (1), and a first spiral blade (7) located inside the smelting cylinder (1) is fixedly connected to the first rotating rod (6). The smelting cylinder (1) is penetrated by a second rotating rod (8) symmetrically arranged with the first rotating rod (6), and a second spiral blade (9) located inside the smelting cylinder (1) is fixedly connected to the second rotating rod (8), and the second spiral blade (9) is matched with the first spiral blade (7). One end of the first rotating rod (6) is fixedly connected to a first gear (10), and one end of the second rotating rod (8) is fixedly connected to a second gear (11) meshing with the first gear (10). A plurality of support and damping assemblies (12) are fixedly connected to the bottom of the smelting cylinder (1), and a plurality of annular heating pipes (15) are mounted on the inner wall of the smelting cylinder (1).
2. The melting and polycondensation equipment for PVC processing according to claim 1, characterized in that: The feed port (2) and the discharge port (3) are respectively located at two ends of the smelting cylinder (1).
3. The melting and polycondensation equipment for PVC processing according to claim 1, characterized in that: Both ends of the first rotating rod (6) are rotatably connected to the smelting cylinder (1) via a first bearing (13), and both ends of the second rotating rod (8) are rotatably connected to the smelting cylinder (1) via a second bearing (14).
4. The melting and polycondensation equipment for PVC processing according to claim 1, characterized in that: The support and shock-absorbing assembly (12) comprises a support column (12.1) arranged at the bottom of the smelting cylinder (1) and fixedly connected thereto, a support sleeve (12.2) slidably connected thereto is sleeved on the lower part of the support column (12.1), a fixing groove (12.3) for the support column (12.1) to slide is provided inside the support sleeve (12.2), and the bottom of the support column (12.1) and the bottom wall of the support sleeve (12.2) are connected via a damping rod (12.4) and a shock-absorbing spring (12.5) located in the fixing groove (12.3).
5. The melting and polycondensation equipment for PVC processing according to claim 4, characterized in that: A circular mounting plate (12.6) is fixedly connected to the bottom of the support sleeve (12.2), and the circular mounting plate (12.6) is provided with a plurality of evenly distributed mounting holes (12.7).
6. The melting and polycondensation equipment for PVC processing according to claim 4, characterized in that: Both sides of the bottom end of the support column (12.1) are fixedly connected with guide slide blocks (12.8), and the side wall of the support sleeve (12.2) is provided with guide slide grooves (12.9) for the guide slide blocks (12.8) to slide.
7. The melting and polycondensation equipment for PVC processing according to claim 4, characterized in that: The shock absorbing spring (12.5) is sleeved on the outside of the damping rod (12.4).