Extrusion equipment for SPC floor production

Abstract

The extrusion equipment for SPC floor production comprises a machine barrel, a pair of conical screws with opposite rotating directions, a driving device in transmission connection with the pair of conical screws and a confluence core installed at a discharging port of the machine barrel, and each conical screw comprises a conical rod body extending from front to back and a thread spirally extending around the conical rod body; the bottom diameter of the conical rod body is gradually reduced from front to back, the outer diameter of the threads is gradually reduced from front to back, the maximum diameter of the conical screw rod is 200-250 mm, and the minimum diameter of the conical screw rod is 100-150 mm; the conical rod body is sequentially provided with a feeding section, a first mixing section, a second mixing section, a first metering section, an exhaust section and a second metering section from front to back, the threads are double-end threads on the feeding section, the first mixing section and the second mixing section, the threads are single-end threads on the first metering section, the threads are four-end threads on the exhaust section, and the threads are three-end threads on the second metering section; the extrusion device can efficiently and stably extrude materials in a low-consumption and high-quality mode, and is particularly suitable for production of SPC plates.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic product production equipment, in particular to an extrusion equipment for SPC floor production. BACKGROUND

[0002] At present, the PVC floor produced by the traditional equipment is bonded by glue, which is not environmentally friendly. In addition, the extrusion equipment has high energy consumption during the production of PVC plates, which does not meet the current market demand for energy saving and environmental protection. The existing SPC floor is environmentally friendly and has low cost, and an extrusion equipment is needed to stably, efficiently and high-quality produce and manufacture SPC plates. SUMMARY

[0003] In order to solve the above technical problems, the purpose of the present application is to provide an extrusion equipment for SPC floor production.

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: an extrusion equipment for SPC floor production, comprising a cylinder, a pair of conical screws with opposite rotation directions, a driving device in transmission connection with the pair of conical screws, and a converging core installed at the discharge port of the cylinder, each of the conical screws comprises a conical rod body extending from front to back and a thread spirally extending around the conical rod body, the bottom diameter of the conical rod body gradually decreases from front to back, the outer diameter of the thread gradually decreases from front to back, the maximum diameter of the conical screw is 200-250mm, and the minimum diameter is 100-150mm; the conical rod body sequentially comprises a feeding section, a first mixing section, a second mixing section, a first metering section, an exhaust section and a second metering section from front to back, the thread in the feeding section, the first mixing section and the second mixing section is double-start thread, the thread in the first metering section is single-start thread, the thread in the exhaust section is four-start thread, and the thread in the second metering section is three-start thread.

[0005] In the above technical scheme, further preferably, a plurality of backflow grooves are arranged on the thread of the second mixing section and spaced along the circumferential direction of the conical rod body.

[0006] In the above technical scheme, further preferably, the center line of each backflow groove and the axis line of the conical rod body have an inclined angle, and the inclined angle is 20°-45°.

[0007] In the above technical scheme, further preferably, the length of the second metering section is greater than the length of other sections.

[0008] In the above technical solution, further preferably, the lead of the thread of the feeding section is greater than the lead of the thread of the first mixing section, the lead of the thread of the first mixing section is greater than the lead of the thread of the second mixing section, the lead of the thread of the exhaust section is greater than the lead of the thread of the second metering section, and the lead of the thread of the second metering section is greater than the lead of the thread of the feeding section.

[0009] In the above technical solution, further preferably, the thickness of the thread gradually decreases from front to back in the second mixing section, and the lead of the thread gradually decreases from front to back in the second mixing section.

[0010] In the above technical solution, further preferably, a feeding port and an exhaust port are formed in the side wall of the barrel, the feeding port is arranged close to the front end of the barrel, the exhaust port corresponds to the exhaust section of the pair of tapered screws, a discharging port is formed in the rear end of the barrel, and a conveying channel extending from front to back is further formed in the barrel, which is in communication with the feeding port, the exhaust port, and the discharging port.

[0011] In the above technical solution, further preferably, a vacuum device is further included, which is in communication with the exhaust port.

[0012] In the above technical solution, further preferably, a temperature control system is further included, which includes a plurality of heating rings, a plurality of cooling fans, and a temperature adjusting device, the plurality of heating rings are sequentially sleeved on the barrel from front to back, the plurality of cooling fans are sequentially arranged outside the barrel from front to back to blow air to the barrel, and the temperature adjusting device is signal connected with the plurality of heating rings and the plurality of cooling fans.

[0013] In the above technical solution, further preferably, the driving device includes a driving motor and a speed reducer, the speed reducer is connected between the pair of tapered screws and the driving motor, and the driving motor is a 160-200 kW AC motor.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] The present application strengthens the mixing and plasticizing of the material through the small-lead multi-start thread, and improves the conveying and mixing of the material through the large-lead multi-start thread. The structural design of the tapered screw can efficiently, lowly, and highly stably extrude the material with high quality, and is especially suitable for the production of SPC boards. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A front view of an extrusion equipment for SPC floor production is provided for the embodiments of the present application.

[0017] Figure 2 for Figure 1 Top view of the extrusion equipment in the middle;

[0018] Figure 3 for Figure 1 A schematic diagram of the tapered screw in the diagram;

[0019] Figure 4 for Figure 3 A schematic diagram of the structure of the second mixing section.

[0020] The components are as follows: 100, extrusion equipment; 10, barrel; 31, feed inlet; 32, discharge outlet; 20, conical screw; 1, conical rod body; 11, feed section; 12, first mixing section; 13, second mixing section; 14, first metering section; 15, exhaust section; 16, second metering section; 2, thread; 21, reflux groove; 30, drive device; 7, drive motor; 8, reducer; 40, confluence core; 50, vacuum device; 60, temperature control system; 4, heating coil; 5, cooling fan; 6, temperature regulating device. Detailed Implementation

[0021] To illustrate the technical content, structural features, achieved objectives, and effects of the application in detail, the technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. In the following description, for illustrative purposes, numerous specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in one or more equivalent arrangements. Furthermore, the various exemplary embodiments may differ, but are not necessarily exclusive. For example, the specific shape, structure, and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0022] This application provides an extrusion apparatus for the production of SPC flooring, such as... Figure 1 , 2As shown, the extrusion equipment 100 includes a barrel 10, a pair of conical screws 20 rotating in opposite directions, a drive unit 30 connected to the pair of conical screws 20, and a confluence core 40 installed at the discharge port 32 of the barrel 10. The pair of conical screws 20 are arranged side by side in the barrel 10 and rotate in mesh. The drive unit 30 drives the pair of conical screws 20 to rotate in opposite directions in the barrel 10. The material is mixed and plasticized under the friction and conveying of the barrel 10 and the pair of conical screws 20, and conveyed from front to back. The confluence core 40 merges the material conveyed by the pair of conical screws 20 in the forward direction at the discharge port of the barrel 10 and extrudes it from an extrusion port to the extrusion die. The extrusion die extrudes the material in sheet form.

[0023] like Figure 3 As shown, each tapered screw 20 includes a tapered rod 1 extending from front to back and a thread 2 extending helically around the tapered rod 1. The base diameter of the tapered rod 1 gradually decreases from front to back, and the outer diameter of the thread 2 gradually decreases from front to back. The maximum diameter D1 of the tapered screw 20 is 200-250 mm, and the minimum diameter D2 is 100-150 mm. In the embodiment of this application, the maximum diameter D1 of the tapered screw 20 is 220 mm, and the minimum diameter D2 is 110 mm.

[0024] The tapered rod 1 consists of, from front to back, a feeding section 11, a first mixing section 12, a second mixing section 13, a first metering section 14, an exhaust section 15, and a second metering section 16. The length of the second metering section 16 is greater than the length of the other sections. The thread 2 is a double-start thread in the feeding section 11, the first mixing section 12, and the second mixing section 13. The thread 2 is a single-start thread in the first metering section 14. The thread 2 is a four-start thread in the exhaust section 15. The thread 2 is a three-start thread in the second metering section 16.

[0025] The lead S1 of the thread in the feed section 11 is greater than the lead S2 of the thread in the first mixing section 12. The lead S2 of the thread in the first mixing section 12 is greater than the lead S3 of the thread in the second mixing section 13. The lead S5 of the thread in the exhaust section 15 is greater than the lead S6 of the thread in the second metering section 16. The lead S6 of the thread in the second metering section 16 is greater than the lead S1 of the thread in the feed section 11. Among these, the lead S3 of the thread in the second mixing section 13 gradually decreases from front to back, and the lead S4 of the thread in the first metering section 14 is less than the minimum lead of the thread in the second mixing section 13.

[0026] The small lead of the feed section 11, the first mixing section 12, and the second mixing section 13 increases the shearing and mixing effect on the material, which helps to improve the uniformity and plasticizing effect of the material and reduce the energy required to drive the conical screw 20. The SPC material in this application has a high calcium powder content. The shearing effect of the material through the multi-start threads with small lead on the pair of conical screws 20 improves the plasticizing efficiency and effect. The lead S1 of the thread in the feed section 11 and the lead S2 of the thread in the first mixing section 12 remain equal from front to back, ensuring the stability of the material flow.

[0027] The large lead of the venting section 15 and the second metering section 16 enhances the mixing effect and enables rapid material output, meeting the high-output requirements of extrusion equipment. The large lead reduces material retention at the tail of the conical screw 20, preventing material degradation or scorching. Furthermore, the multi-start threads of the venting section 15 and the second metering section 16 ensure more uniform material delivery, reduce pressure fluctuations, improve the stability of the extrusion process, and reduce drive energy consumption. The four-start thread of the venting section 15, while improving material delivery, continuously disperses and mixes the material, allowing for rapid and efficient discharge of gas, reducing the gas and moisture content, and ensuring that the extruded product is free of bubbles and impurities, thus improving product quality.

[0028] like Figure 3 , 4 As shown, the thickness d of the thread 2 in the second mixing section 13 gradually decreases from front to back, and multiple return grooves 21 arranged at intervals along the circumference of the conical rod 1 are formed on the thread of the second mixing section 13. Each return groove 21 is U-shaped. The thickness and lead of the thread 2 gradually decrease in the second mixing section 13, which makes the compression of the material in the second mixing section 13 more compact and uniform, and improves the plasticizing effect.

[0029] Each return channel 21 has a centerline X2 and an axis X1 of the conical rod 1 with an inclined angle α, which is 20°-45°. The large-angle return channel 21 enhances the mixing and plasticizing of the material in the second mixing section 13.

[0030] Continue to refer to Figure 1 and Figure 2 The side wall of the barrel 10 is provided with a feed inlet 31 and an exhaust outlet (not shown in the figure). The feed inlet 31 is located near the front end of the barrel 10, and the exhaust outlet corresponds to the exhaust section 15 of a pair of tapered screws 20. The discharge outlet 32 ​​is located at the rear end of the barrel 10. A conveying channel extending from front to back is also provided inside the barrel 10, which connects the feed inlet 31, the exhaust outlet and the discharge outlet 32.

[0031] The extrusion equipment 100 also includes a vacuum device 50, which is connected to the exhaust port. The vacuum device 50 is used to quickly extract the gas and impurities discharged from the material at the exhaust port to avoid untimely exhaust.

[0032] The extrusion equipment 100 also includes a temperature control system 60, which includes multiple heating coils 4, multiple cooling fans 5, and a temperature regulating device 6. The multiple heating coils 4 are sequentially mounted on the barrel 10 from front to back, and the multiple cooling fans 5 are sequentially arranged outside the barrel 10 from front to back to blow cool air onto the barrel 10. The temperature regulating device 6 is signal-connected to the multiple heating coils 4 and the multiple cooling fans 5 to control the operation of the heating coils 4 and the cooling fans 5 according to the temperature of the barrel 10, so that the temperature of each area of ​​the barrel is more precise and the extrusion efficiency of the extrusion equipment 100 is improved.

[0033] The drive unit 30 includes a drive motor 7 and a reducer 8. The reducer 8 is connected between a pair of conical screws 20 and the drive motor 7. The drive motor 7 is a 160-200kW AC motor. The drive motor 7 drives the pair of conical screws 20 to rotate in opposite directions at the same speed through the reducer 8.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made without departing from the spirit and scope of this application. The scope of protection claimed by this application is defined by the appended claims, specification, and their equivalents.

Claims

1. An extrusion apparatus for producing SPC flooring, comprising a barrel, a pair of conical screws with opposite directions of rotation, a drive mechanism pulsator connected to the pair of conical screws, and a confluence core mounted at the discharge port of the barrel, each of the conical screws comprising a conical rod extending from front to back and a thread extending helically around the conical rod, characterized in that, The bottom diameter of the tapered rod gradually decreases from front to back, and the outer diameter of the thread gradually decreases from front to back. The maximum diameter of the tapered screw is 200-250mm, and the minimum diameter is 100-150mm. The tapered rod consists of a feeding section, a first mixing section, a second mixing section, a first metering section, a venting section, and a second metering section from front to back. The thread in the feeding section, the first mixing section, and the second mixing section is a double-start thread. The thread in the first metering section is a single-start thread. The thread in the venting section is a four-start thread. The thread in the second metering section is a three-start thread.

2. The extrusion equipment according to claim 1, characterized in that, The second mixing section has multiple return grooves arranged at intervals along the circumference of the tapered rod.

3. The extrusion equipment according to claim 2, characterized in that, The centerline of each of the aforementioned reflux channels has an inclined angle with the axis of the conical rod, and the inclined angle is 20°-45°.

4. The extrusion equipment according to claim 1, characterized in that, The length of the second measuring segment is greater than the length of the other segments.

5. The extrusion equipment according to claim 1, characterized in that, The lead of the thread in the feed section is greater than the lead of the thread in the first mixing section, the lead of the thread in the first mixing section is greater than the lead of the thread in the second mixing section, the lead of the thread in the venting section is greater than the lead of the thread in the second metering section, and the lead of the thread in the second metering section is greater than the lead of the thread in the feed section.

6. The extrusion equipment according to claim 5, characterized in that, The thickness of the thread in the second mixing section gradually decreases from front to back, and the lead of the thread in the second mixing section gradually decreases from front to back.

7. The extrusion equipment according to claim 1, characterized in that, The barrel has a feed inlet and an exhaust outlet on its side wall. The feed inlet is located near the front end of the barrel. The exhaust outlet corresponds to the exhaust section of the pair of conical screws. The discharge outlet is located at the rear end of the barrel. The barrel also has a conveying channel extending from front to back, which connects the feed inlet, the exhaust outlet and the discharge outlet.

8. The extrusion equipment according to claim 7, characterized in that, It also includes a vacuum device, which is connected to the exhaust port.

9. The extrusion equipment according to claim 1, characterized in that, It also includes a temperature control system, which includes multiple heating coils, multiple cooling fans, and a temperature regulating device. The multiple heating coils are sequentially fitted onto the casing from front to back, and the multiple cooling fans are sequentially arranged outside the casing from front to back to blow air onto the casing. The temperature regulating device is signal-connected to the multiple heating coils and the multiple cooling fans.

10. The extrusion equipment according to claim 1, characterized in that, The drive device includes a drive motor and a reducer. The reducer is connected between the pair of conical screws and the drive motor. The drive motor is a 160-200kW AC motor.

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