Recycled plastic particle preheating device
By combining the spiral shaft and spiral heating wire, the problem of uneven heating during the preheating process of recycled plastic granules is solved, achieving uniform heating and efficient flowability of the plastic granules, and improving the molding and processing effect.
Patent Information
- Application Number
- CN202423273418.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The existing preheating process for recycled plastic pellets suffers from uneven heating, especially with low temperatures in the central area and high temperatures in the outer area, resulting in uneven viscosity of the plastic melt and affecting subsequent molding and processing.
The design combines a spiral shaft and a spiral heating wire. The spiral shaft circulates and transports plastic granules from the center to the outer periphery, where they are heated by the spiral heating wire on the outer periphery of the tank. Combined with a stirring rod and an insulation layer, uniform heating is ensured. A temperature sensor is used to control the heating temperature.
It achieves uniform heating of recycled plastic granules, avoids temperature differences between the center and the periphery, and improves the fluidity of plastic melt and molding efficiency.
Smart Images
Figure CN223685788U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of plastic preheating, more specifically, it relates to a regenerated plastic particle preheating device. BACKGROUND
[0002] Regenerated plastic refers to the plastic obtained through a series of processing and treatment of waste plastic. These waste plastics are widely sourced, including various plastic products such as plastic bottles, plastic films, plastic pipes, etc. It is an important product of plastic recycling, which helps to reduce the dependence on virgin plastic (plastic synthesized directly from petroleum and other raw materials), and has important significance in environmental protection and resource utilization. After preheating, the temperature of the plastic increases, and the activity of the molecular chain is enhanced. For regenerated plastic, due to the degradation or damage of the molecular chain during the recycling process, the interaction between the molecular chains may become more complex. Preheating can reduce the melt viscosity of regenerated plastic, so that the plastic melt can flow more smoothly in the mold or the screw of the extruder during subsequent forming and processing, such as extrusion and injection molding.
[0003] At present, the preheating method of regenerated plastic mainly adopts stirring heating. Since the heating components are mainly arranged on the outer periphery of the cylinder, the center area is prone to have too low temperature, and the plastic in the outer periphery area is prone to have too high temperature, resulting in uneven temperature distribution. Although the spiral stirring blade can solve this problem to some extent, its stirring efficiency is low, and it takes a long time to complete the uniform mixing of the plastic particles.
[0004] Based on the above patent search and combined with the existing technology, it is found that the existing regenerated plastic particle preheating process is not uniform.
[0005] Therefore, in view of the above problems, the existing structure and defects are improved, and a regenerated plastic particle preheating device is provided, so as to achieve the purpose of having more practical value. INVENTION CONTENTS
[0006] In order to solve the above technical problems, the utility model provides a regenerated plastic particle preheating device to solve the problem of uneven heating in the existing regenerated plastic particle preheating process.
[0007] The purpose and effect of the regenerated plastic particle preheating device are achieved by the following specific technical means:
[0008] A regenerated plastic particle preheating device comprises:
[0009] The tank body and the upper and lower through inner cylinder body arranged in the tank body are provided with a spiral shaft, a motor is mounted outside the tank body, the spiral shaft is in transmission connection with the motor, a spiral electric heating wire is arranged on the outer periphery of the tank body, and the spiral electric heating wire is provided with a negative electrode electric connection part and a positive electrode electric connection part;
[0010] The upper part of the tank body is provided with a feeding port, and the bottom of the tank body is provided with a discharging port provided with a valve.
[0011] Preferably, at least one rod body is fixedly connected to the upper end of the spiral shaft, a vertically arranged stirring rod is connected to the outer end of the rod body, and the stirring rod is arranged close to the inner wall of the tank body.
[0012] Preferably, a diffusion ring is arranged on the outer edge of the upper end of the inner cylinder body.
[0013] Preferably, the cross section of the diffusion ring is arc-shaped.
[0014] Preferably, a supporting rod is fixedly connected to the lower end of the inner cylinder body and fixedly connected to the bottom of the inner wall of the inner cylinder body.
[0015] Preferably, a heat preservation layer is arranged on the outer periphery of the spiral electric heating wire.
[0016] Preferably, the heat preservation layer is made of rock wool.
[0017] Preferably, the heat preservation layer is made of composite silicate heat preservation material.
[0018] Preferably, a temperature sensor is further arranged at the bottom of the tank body.
[0019] Preferably, a cover plate is further arranged, and the cover plate is in threaded connection with the upper end of the feeding port.
[0020] Compared with the prior art, the present application has the following advantages:
[0021] The spiral shaft is arranged to circulate and convey the plastic particles, under the action of the rotation of the spiral shaft, the plastic particles at the bottom of the center of the tank body are continuously conveyed to the top, and then diffused and fallen to the outer periphery from the top, and then contacted with the inner peripheral wall of the tank body, the negative electrode electric connection part and the positive electrode electric connection part of the spiral electric heating wire arranged on the outer periphery of the tank body are electrified to heat the tank body, and then the plastic particles are continuously preheated, and since the plastic particles are circulated and flowed from the center to the outside, the plastic particles are uniformly heated, and the temperature difference between the center and the outside does not exist. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 is a sectional view of an embodiment one of the regenerated plastic particle preheating device.
[0023] Figure 2is a sectional structure schematic diagram of embodiment two of the regenerated plastic particle preheating device.
[0024] Figure 3 is a sectional structure schematic diagram of embodiment three of the regenerated plastic particle preheating device.
[0025] Figure 4 is a sectional structure schematic diagram of embodiment four and five of the regenerated plastic particle preheating device.
[0026] Figure 5 is a sectional structure schematic diagram of embodiment six of the regenerated plastic particle preheating device.
[0027] In the drawing, the corresponding relationship of component names and figure numbers is:
[0028] The tank body 1, the discharge port 10, the valve 11, the feeding port 12, the cover plate 13, the inner cylinder body 2, the diffusion ring 20, the supporting rod 21, the spiral shaft 3, the motor 4, the stirring rod 5, the spiral heating wire 6, the negative electrode electricity connection part 60, the positive electrode electricity connection part 61, the heat preservation layer 7, and the temperature sensor 8. DETAILED DESCRIPTION
[0029] The embodiment of the present application will be further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.
[0030] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for description purposes and cannot be understood as indicating or implying relative importance.
[0031] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0032] Example one:
[0033] As shown in the accompanying drawings: Figure 1
[0034] The utility model provides a kind of recycled plastic particles preheating device, comprising:
[0035] Tank body 1 and the upper and lower through inner cylinder 2 being arranged in tank body 1, the inner cylinder 2 is provided with spiral shaft 3, motor 4 is installed outside the tank body 1, the spiral shaft 3 is connected with motor 4 transmission, the outer periphery of the tank body 1 is provided with helical electric heating wire 6, the helical electric heating wire 6 is provided with negative electrode electric connection part 60 and positive electrode electric connection part 61;
[0036] The upper portion of the tank body 1 is provided with a feed inlet 12, and the bottom of the tank body 1 is provided with a discharge outlet 10, and the discharge outlet 10 is provided with a valve 11.
[0037] The lower end of the inner cylinder 2 is fixedly connected with a support rod 21, and the support rod 21 is fixedly connected with the inner wall bottom of the inner cylinder 2.
[0038] In this embodiment, the spiral shaft 3 is provided to circulate and transport the plastic particles. Under the action of the rotation of the spiral shaft 3, the plastic particles at the center bottom of the tank body 1 are continuously transported to the top and diffuse and fall from the top to the outer periphery, and come into contact with the inner circumferential wall of the tank body 1. The negative electrode electric connection part 60 and the positive electrode electric connection part 61 of the helical electric heating wire 6 provided on the outer periphery of the tank body 1 are electrified to heat the tank body 1, and then the plastic particles are continuously preheated. Since the plastic particles circulate and flow from the center to the outside, the plastic particles are uniformly heated, and there is no problem of temperature difference between the center and the outside.
[0039] Example two:
[0040] The remaining features are the same as those of example one, except that in this embodiment, the upper end of the spiral shaft 3 is fixedly connected with at least one rod body, the outer end of the rod body is connected with a vertically arranged stirring rod 5, and the stirring rod 5 is arranged close to the inner wall of the tank body 1. The stirring rod 5 is connected with the motor 4 in transmission through the spiral shaft 3, so that the motor 4 drives the stirring rod 5 to stir the plastic particles close to the inner circumferential wall of the tank body 1, to avoid the plastic particles from being in contact with the inner circumferential wall for a long time, thereby further improving the uniformity of heating of the plastic particles.
[0041] Example three:
[0042] The remaining features are the same as those of example two, except that the outer edge of the upper end of the inner cylinder 2 is provided with a diffusion ring 20.
[0043] The cross section of the diffusion ring 20 is arc-shaped.
[0044] The arrangement of the arc-shaped diffusion ring 20 further ensures that the plastic particles circulate and flow as close as possible to the inner circumferential wall of the tank body 1 for heating, to avoid being directly circulated to the center area, thereby ensuring that the plastic particles are uniformly heated.
[0045] Embodiment four:
[0046] The rest of the features are the same as embodiment three, and the difference is that the spiral heating wire 6 is provided with a heat preservation layer 7. The setting of the heat preservation layer 7 improves the heat preservation performance of the preheating device, reduces the energy loss of heat dissipation, and improves the energy utilization rate.
[0047] The heat preservation layer 7 is made of rock wool. This material has good heat insulation performance and excellent fireproof performance, strong chemical stability, and chemical corrosion resistance. The maximum use temperature is generally about 600 DEG C, the melting point is more than 1100 DEG C, and the fire resistance time is more than 2 hours. So that the device can maintain good heat preservation performance for a long time.
[0048] Embodiment five:
[0049] The rest of the features are the same as embodiment four, and the difference is that the heat preservation layer 7 is replaced by a composite silicate heat preservation material. This material has the advantages of low thermal conductivity, good heat preservation effect, high temperature resistance, aging resistance, etc.
[0050] Embodiment six:
[0051] It also includes a temperature sensor 8 arranged at the bottom of the tank body 1. The setting of the temperature sensor 8 can effectively detect the heating temperature of the plastic particles, so that the plastic particles are discharged at the appropriate temperature.
[0052] It also includes a cover plate 13, which is threadedly connected with the upper end of the feed port 12. The setting of the cover plate 13 ensures the sealing and reduces the heat loss.
[0053] The specific use mode and effect of the embodiment are as follows:
[0054] In use, the plastic particles are input from the feed port 12, the spiral heating wire 6 is started to heat the tank body 1, and the motor 4 is started to rotate, so that the plastic particles are circulated and transported, and the stirring rod 5 stirs the plastic particles on the inner wall of the tank body 1 to avoid being heated for too long time. When the temperature sensor 8 detects that the temperature reaches the appropriate temperature, the motor 4 is reversely rotated, and the valve 11 is opened, and the plastic particles are discharged downward along the central axis of the device from the valve 11.
[0055] The embodiments of the present application are given for the purpose of illustration and description, and are not exhaustive or limit the present application to the disclosed form. Many modifications and changes are obvious to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical application of the present application, and to enable those skilled in the art to understand the present application so as to design various embodiments with various modifications suitable for specific purposes.
Claims
1. A recycled plastic particle preheating device, characterized by, Include: The tank body (1) and the upper and lower through inner cylinder (2) provided in the tank body (1), the inner cylinder (2) is provided with a spiral shaft (3), the tank body (1) is provided with a motor (4) outside, the spiral shaft (3) is in driving connection with the motor (4), the tank body (1) is provided with a spiral heating wire (6) on the outer periphery, the spiral heating wire (6) is provided with a negative electrode and a positive electrode (61) of electric part (60); The upper portion of the tank body (1) is provided with a feeding port (12), and the bottom of the tank body (1) is provided with a discharge port (10), and the discharge port (10) is provided with a valve (11).
2. A preheating device for recycled plastic particles as claimed in claim 1, wherein: The upper end of the spiral shaft (3) is fixedly connected with at least one rod body, the outer end of the rod body is connected with a vertically arranged stirring rod (5), and the stirring rod (5) is arranged close to the inner wall of the tank body (1).
3. A preheating device for recycled plastic pellets as claimed in claim 1, wherein: The outer end of the inner cylinder (2) is provided with a diffusion ring (20).
4. A preheating device for recycled plastic particles as claimed in claim 3, wherein: The cross section of the diffusion ring (20) is arc-shaped.
5. A preheating device for recycled plastic pellets as claimed in claim 1, wherein: The lower end of the inner cylinder (2) is fixedly connected with a supporting rod (21), and the supporting rod (21) is fixedly connected with the inner wall bottom of the inner cylinder (2).
6. A recycled plastic pellet preheating device as claimed in claim 1, wherein: The outer periphery of the spiral heating wire (6) is provided with a heat preservation layer (7).
7. A preheating device for recycled plastic pellets as claimed in claim 6, wherein: The heat preservation layer (7) adopts rock wool.
8. A preheating device for recycled plastic pellets as claimed in claim 6, wherein: The heat preservation layer (7) adopts composite silicate heat preservation material.
9. A recycled plastic pellet preheating device as claimed in claim 1, wherein: It also includes a temperature sensor (8) provided at the bottom of the tank body (1).
10. A preheating device for recycled plastic pellets as claimed in claim 1, wherein: It also includes a cover plate (13), which is threadedly connected with the upper end of the feeding port (12).