Extrusion molding equipment for thermoplastic plastics

Abstract

The utility model discloses thermoplastic plastic extrusion molding equipment which comprises an extrusion cylinder and a spiral blanking rod, the outer side of the extrusion cylinder is fixedly connected with a spiral heat pipe, the outer side of the extrusion cylinder is fixedly connected with a sealing cylinder, baffle rings are uniformly and fixedly connected in the sealing cylinder, and one side of the bottom end of the sealing cylinder is fixedly connected with a first air pump; the output end of the first air pump is fixedly connected with the sealing cylinder and internally communicated with the sealing cylinder, one side of the extrusion cylinder is fixedly connected with a second air pump, the input end of the second air pump is communicated with the sealing cylinder, one side of the extrusion cylinder is fixedly connected with a preheating cylinder, and one side of the extrusion cylinder and one side of the preheating cylinder are provided with discharging ports. And overflowing heat generated by the spiral heat pipe is guided into the heating frame through the first air pump and the second air pump, the preheating barrel is pumped to be in a vacuum state in cooperation with the vacuum pump, and meanwhile the turning plate and the rotating disc are matched, so that water vapor and air in plastic particles are reduced, and the quality of the formed thermoplastic plastic is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermoplastic processing, and particularly relates to an extrusion molding device for thermoplastics. Background Art

[0002] Thermoplastics are plastics that are plastic at a certain temperature, solidify after cooling, and can repeat this process. Generally, they do not have active groups and do not undergo cross-linking between linear molecules when heated, making processing relatively convenient. The raw materials generally include polyolefins, celluloses, polyether polyesters, and aromatic heterocyclic polymers, etc. During the processing of thermoplastics, the plastic needs to be heated and melted, but water vapor will be generated by plastic particles during the heating process.

[0003] According to the "extrusion molding device for plastic particles" with the Chinese patent publication number CN214000119U, it mainly describes that there is a feeding bin, a rotating shaft, a feeding roller, and a second driving motor installed. The feeding roller is evenly provided with feeding grooves. The second driving motor drives the feeding roller to rotate through the rotating shaft. When the feeding groove rotates to the upper side, plastic raw materials fall into the feeding groove. When the feeding groove rotates to the lower side, the plastic raw materials inside the feeding groove fall into the feeding pipe by gravity. The device has uniform feeding, which is beneficial to fully melting the plastic raw materials, and thus is beneficial to improving the molding effect of plastic particles. During this process, water vapor is generated when heating thermoplastic particles, resulting in bubbles being easily generated during the extrusion of thermoplastics, affecting the molding quality of thermoplastics.

[0004] Therefore, an extrusion molding device for thermoplastics is proposed to solve the problem that water vapor is generated when heating thermoplastic particles during this process, resulting in bubbles being easily generated during the extrusion of thermoplastics and affecting the molding quality of thermoplastics. Content of the Utility Model

[0005] The technical problem to be solved by the utility model: During this process, water vapor is generated when heating thermoplastic particles, resulting in bubbles being easily generated during the extrusion of thermoplastics and affecting the molding quality of thermoplastics. Therefore, an extrusion molding device for thermoplastics is proposed.

[0006] The technical solution adopted by the present utility model to solve the technical problem is: an extrusion molding device for thermoplastic plastics, including an extrusion barrel and a spiral feeding rod. A spiral heat pipe is fixedly connected to the outer side of the extrusion barrel. A sealing barrel is fixedly connected to the outer side of the extrusion barrel. A retaining ring is evenly and fixedly connected inside the sealing barrel. One side of the bottom end of the sealing barrel is fixedly connected with a first air pump. The output end of the first air pump is fixedly connected to the sealing barrel and is internally communicated. A second air pump is fixedly connected to one side of the extrusion barrel, and the input end of the second air pump is communicated with the sealing barrel. A preheating barrel is fixedly connected to one side of the extrusion barrel. A feeding port is opened on one side of the extrusion barrel and the preheating barrel. A heating frame is fixedly connected to the outer side of the preheating barrel. Air holes are evenly opened at the upper end of the heating frame. A sealing plate is in contact with the upper end of the heating frame. One side of the upper end of the sealing plate is fixedly connected with a vacuum pump. A feeding groove is opened on the sealing plate at the side of the vacuum pump. A guiding cover is fixedly connected to the sealing plate above the feeding groove. A positive and negative motor is fixedly connected to the center of the upper end of the sealing plate. The output end of the positive and negative motor is fixedly connected with a rotating plate.

[0007] As a preferred technical solution of the present utility model, a spiral air guiding sheet is fixedly connected inside the heating frame. One side of the spiral air guiding sheet is fixedly connected to the preheating barrel. By setting the spiral air guiding sheet, the air flow entering the heating frame can be guided.

[0008] As a preferred technical solution of the present utility model, a driving motor is fixedly connected to the preheating barrel at the feeding port. The output end of the driving motor is fixedly connected with a flap. By setting the flap, the preheated material can be driven to move downward and enter the extrusion barrel 1.

[0009] As a preferred technical solution of the present utility model, baffles are fixedly connected inside the preheating barrel, and the baffles correspond to each other. By setting the baffles, the falling speed of the plastic particles can be reduced, thereby improving the preheating effect.

[0010] As a preferred technical solution of the present utility model, arc-shaped sheets are evenly fixedly connected to the bottom side of the preheating barrel where the baffles are located. The arc-shaped sheets are made of a metal heat-conducting material. By setting the arc-shaped sheets, they can cooperate with the spiral air guiding sheet to improve the waste heat effect of the plastic particles in the preheating barrel.

[0011] The present utility model has the following advantages: By installing a sealing barrel on the outer side of the extrusion barrel, and through the first air pump and the second air pump, the heat overflowing from the spiral heat pipe is guided into the heating frame. Cooperating with the vacuum pump to evacuate the preheating barrel to a vacuum state, and at the same time, the flap and the rotating disk cooperate, thereby reducing the water vapor and air in the plastic particles and improving the quality of the thermoplastic plastics after molding. Description of the Drawings

[0012] Figure 1It is a schematic side sectional view of an extrusion molding device for thermoplastic plastics according to a preferred embodiment of the present utility model;

[0013] Figure 2 It is a schematic side sectional view of the sealing cylinder of an extrusion molding device for thermoplastic plastics according to a preferred embodiment of the present utility model;

[0014] Figure 3 It is a schematic three-dimensional structure view of an extrusion molding device for thermoplastic plastics according to a preferred embodiment of the present utility model.

[0015] Explanation of reference numerals: 1. Extrusion cylinder; 2. Spiral feeding rod; 3. Spiral heat pipe; 4. Sealing cylinder; 5. First air pump; 6. Second air pump; 7. Preheating cylinder; 8. Feeding port; 9. Heating frame; 10. Sealing plate; 11. Vacuum pump; 12. Guide cover; 13. Rotating plate; 14. Spiral air guide piece; 15. Flap; 16. Baffle; 17. Arc piece; 18. Retaining ring. Detailed implementation manners

[0016] The present utility model will be further described below with reference to the accompanying drawings.

[0017] Please refer to Figures 1-3 The shown extrusion molding device for thermoplastic plastics includes an extrusion cylinder 1 and a spiral feeding rod 2. A spiral heat pipe 3 is fixedly connected to the outside of the extrusion cylinder 1, and a sealing cylinder 4 is fixedly connected to the outside of the extrusion cylinder 1. A retaining ring 18 is evenly and fixedly connected inside the sealing cylinder 4. A first air pump 5 is fixedly connected to one side of the bottom end of the sealing cylinder 4. The first air pump 5 guides air from the external environment and enters the sealing cylinder 4, and then is blocked by the retaining ring 18, and the air flow is evenly heated. At this time, the second air pump 6 extracts gas and enters the heating frame 9, and gradually heats the preheating cylinder 7, and then cooperates with a vacuum generator by the vacuum pump 11, so as to preheat the plastic particles and reduce the water vapor contained in the plastic particles. The output end of the first air pump 5 is fixedly connected to the sealing cylinder 4 and is internally communicated. A second air pump 6 is fixedly connected to one side of the extrusion cylinder 1, and the input end of the second air pump 6 is communicated with the sealing cylinder 4. A preheating cylinder 7 is fixedly connected to one side of the extrusion cylinder 1. A feeding port 8 is opened on one side of the extrusion cylinder 1 and the preheating cylinder 7. A heating frame 9 is fixedly connected to the outside of the preheating cylinder 7. Air holes are evenly opened on the upper end of the heating frame 9. A sealing plate 10 is in contact with the upper end of the heating frame 9. A vacuum pump 11 is fixedly connected to one side of the upper end of the sealing plate 10. The vacuum generator is located on one side of the bottom end of the sealing plate 10. A feeding groove is opened on the sealing plate 10 at the side of the vacuum pump 11. A guide cover 12 is fixedly connected to the upper side of the sealing plate 10 at the feeding groove. A positive and negative motor is fixedly connected to the center of the upper end of the sealing plate 10. The output end of the positive and negative motor is fixedly connected to a rotating plate 13.

[0018] Among them, the preheating cylinder 7 is fixedly connected to one side of the spiral air guide piece 14. The spiral air guide piece 14 is fixedly connected inside the heating frame 9. By setting the spiral air guide piece 14, the time of the preheating air flow inside the heating frame 9 can be increased.

[0019] Among them, the flap 15 is fixedly connected to the output end of the driving motor. The driving motor is fixedly connected to the bottom side of the preheating cylinder 7, and the driving motor is close to the material discharge port 8. By setting the driving motor to drive the flap 15 to flip, the preheated plastic can fall into the extrusion cylinder 1.

[0020] Among them, the baffle plates 16 are fixedly connected to two sides of the preheating cylinder 7 that are far away from each other and correspond to each other to form an included angle. The plastic particles will first fall onto the baffle plates 16 and then gradually fall, reducing the falling speed of the plastic particles, thereby improving the preheating effect of the plastic particles.

[0021] Among them, the arc-shaped pieces 17 are uniformly fixedly connected inside the preheating cylinder 7, and the arc-shaped pieces 17 are located at the bottom side of the baffle plates 16. By setting the arc-shaped pieces 17, the heat transfer effect of the metal can be increased, the temperature inside the preheating cylinder 7 can be increased, and thus the drying efficiency of the plastic particles can be accelerated.

[0022] Working principle: The plastic particles are put into the preheating cylinder 7 from the guiding cover 12. The forward and reverse motor drives the rotating plate 13 to rotate, so that the material discharging groove is in an open state, and the flap 15 makes the material discharge port 8 in a closed state. Then, the spiral heat pipe 3 on the extrusion cylinder 1 heats the extrusion cylinder 1, and the first air pump 5 extracts the outside air and enters it into the sealing cylinder 4. The air flow is blocked by the retaining ring 18, and the molecular movement between the air flows is intensified, so as to guide the overflowing heat. At this time, the second air pump 6 is used to extract the heat flow and enter it into the heating frame 9. After passing through the spiral air guide piece 14, the hot air contacts the inside of the preheating cylinder 7, and through metal conduction, the plastic particles are heated. The water vapor inside the plastic particles is dried, and the moisture and air are extracted by the vacuum pump 11 and the vacuum generator, which can improve the forming quality of the thermoplastic plastic.

[0023] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

[0024] Other parts not described in detail in the present invention belong to the prior art, so they will not be elaborated here.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention 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 described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Extrusion molding equipment for thermoplastics, comprising an extrusion barrel (1) and a spiral feeding rod (2), wherein a spiral heat pipe (3) is fixedly connected to the outer side of the extrusion barrel (1), and is characterized in that, A sealing cylinder (4) is fixedly connected to the outside of the extrusion cylinder (1). A retaining ring (18) is fixedly connected to the sealing cylinder (4) evenly. A first air pump (5) is fixedly connected to one side of the bottom end of the sealing cylinder (4). The output end of the first air pump (5) is fixedly connected to the sealing cylinder (4) and is internally communicated. A second air pump (6) is fixedly connected to one side of the extrusion cylinder (1), and the input end of the second air pump (6) is communicated with the sealing cylinder (4). A preheating cylinder (7) is fixedly connected to one side of the extrusion cylinder (1). A feeding port (8) is provided on one side of the extrusion cylinder (1) and the preheating cylinder (7). A heating frame (9) is fixedly connected to the outside of the preheating cylinder (7). Air holes are evenly provided on the upper end of the heating frame (9). A sealing plate (10) is in contact with the upper end of the heating frame (9). A vacuum pump (11) is fixedly connected to one side of the upper end of the sealing plate (10). A feeding groove is provided on the sealing plate (10) at the side of the vacuum pump (11). A guiding cover (12) is fixedly connected to the sealing plate (10) above the feeding groove. A positive and negative motor is fixedly connected to the center of the upper end of the sealing plate (10). The output end of the positive and negative motor is fixedly connected to a rotating plate (13).

2. The extrusion molding equipment for thermoplastic plastics according to claim 1, characterized in that, A spiral air guiding piece (14) is fixedly connected to the heating frame (9). One side of the spiral air guiding piece (14) is fixedly connected to the preheating cylinder (7).

3. The extrusion molding equipment for thermoplastics according to claim 2, characterized in that, A driving motor is fixedly connected to the preheating cylinder (7) at the feeding port (8). The output end of the driving motor is fixedly connected to a flap (15).

4. The extrusion molding equipment for thermoplastics according to claim 3, characterized in that, A baffle (16) is fixedly connected to the preheating cylinder (7), and the baffles (16) correspond to each other.

5. The extrusion molding equipment for thermoplastic plastics according to claim 4, characterized in that, Arc-shaped pieces (17) are fixedly connected to the preheating cylinder (7) evenly at the bottom side of the baffle (16). The arc-shaped pieces (17) are made of a metal heat-conducting material.

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