High-plasticization double-alloy machine barrel screw

Abstract

The utility model relates to the field of screws, aims to solve the problem that the plasticizing efficiency of the screws is low, and discloses a high-plasticizing double-alloy machine barrel screw which comprises a feeding section, a plasticizing section, a metering section, a first screw body and a second screw body, and the diameter of the first screw body is larger than that of the second screw body. First threads are evenly assembled on the surface of the first screw body, second threads are evenly assembled on the surface of the second screw body, first thread grooves are formed between the first threads, second thread grooves are formed between the second threads, and the second screw body located on the plasticizing section is evenly sleeved with crushing teeth. The two ends of the surface of the first screw body are both sleeved with first gears, and the two ends of the surface of the second screw body are both sleeved with second gears. According to the utility model, through the cooperation of the double screws, when materials are conveyed, the small-diameter screw is used for conveying in the opposite direction of conveying, and the materials are plasticized in a reinforced manner, so that the plasticizing effect of the materials is improved, and the injection molding of the materials is more uniform.

Description

Technical Field

[0001] The utility model relates to the field of screws, in particular to a high-plasticizing double-alloy barrel screw. Background Art

[0002] Foamed PP has excellent mechanical properties, thermal stability, high-temperature dimensional stability and degradability and recyclability, and is a green packaging material vigorously developed at home and abroad. PP foamed materials are usually prepared by methods such as extrusion molding and compression molding, and PP injection foaming molding is rare. At present, three-stage screws are generally used in injection molding. During injection molding, there are often defects such as bubbles in the injection-molded PP, bending deformation of the injection-molded products, pores and flow marks on the surface, so that the plasticizing effect cannot meet the requirements. When injecting, when the material is transmitted between the screws, some materials will not be fully stirred, and some unmelted materials will be transmitted during the transmission, resulting in uneven injection materials. How to quickly plasticize the material during the transmission of the injection material is an important problem to be solved. Therefore, the inventor invented a high-plasticizing double-alloy barrel screw to solve the plasticizing problem of the screw. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the deficiencies of the prior art and provide a high-plasticizing double-alloy barrel screw.

[0004] The utility model is realized by the following technical solutions:

[0005] A high-plasticizing double-alloy barrel screw, including a feeding section, a plasticizing section, a metering section, a first screw body and a second screw body. The diameter of the first screw body is larger than that of the second screw body. The surface of the first screw body is evenly equipped with first threads, and the surface of the second screw body is evenly equipped with second threads. First thread grooves are arranged between the first threads, and second thread grooves are arranged between the second threads. Crushing teeth are evenly sleeved on the second screw body in the plasticizing section. First gears are sleeved at both ends of the surface of the first screw body, and second gears are sleeved at both ends of the surface of the second screw body.

[0006] As a preferred technical solution of the utility model, the first gear is meshed and matched with the second gear, and the diameter of the first gear is 2 times that of the second gear.

[0007] As a preferred technical solution of the utility model, the cross-section of the first screw body is crescent-shaped, and the first screw body is wrapped outside the second screw body.

[0008] As a preferred technical solution of the utility model, the crushing teeth form a 60-degree angle with the second threads, are vertically arranged with the second screw body, and the gap between the crushing teeth is one-half of the width of the second thread groove.

[0009] As a preferred technical solution of the present utility model, the first thread and the second thread are in opposite directions, and the first screw body and the second screw body cooperate with each other.

[0010] As a preferred technical solution of the present utility model, both the first screw body and the second screw body are made of 42CrMo alloy material, and the first thread, the second thread and the crushing teeth are all made of 42CrMo alloy material.

[0011] As a preferred technical solution of the present utility model, the first thread and the second thread are arranged in an alternating manner.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] The present utility model adopts a twin-screw structure composed of a first screw body and a second screw body. By utilizing the cooperation between the first screw body and the second screw body, during the process of the first screw body transporting the material, the second screw body rapidly transports the material in the opposite direction of the transportation, and further crushes the material that has not been fully crushed by the crushing teeth, thereby making the transported material more refined and improving the plasticization efficiency. The cooperation between the first gear and the second gear uses the large wheel to drive the small wheel, which can accelerate the rotation of the second screw body. The present utility model uses the cooperation of twin screws. When transporting the material, it uses the small-diameter screw to transport in the opposite direction of the transportation to strengthen the plasticization of the material, thereby improving the plasticization effect of the material and making the injection of the material more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a side view of the cooperation between the first screw body and the second screw body of the present utility model and the barrel;

[0016] Figure 3 is a schematic structural diagram of the cooperation between the first screw body and the second screw body of the present utility model;

[0017] Figure 4 is a schematic diagram of the material flow direction of the present utility model;

[0018] In the figure: 1, feeding section; 2, plasticizing section; 3, metering section; 4, first thread groove; 5, first thread; 6, first screw body; 7, first gear; 8, second screw body; 9, second gear; 10, second thread; 11, second thread groove; 12, crushing teeth. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1-4 , the present utility model provides a technical solution:

[0021] A high-plasticizing double-alloy barrel screw, comprising a feeding section 1, a plasticizing section 2, a metering section 3, a first screw body 6 and a second screw body 8. The diameter of the first screw body 6 is larger than that of the second screw body 8. The first screw body 6 is evenly equipped with first threads 5 on its surface, and the second screw body 8 is evenly equipped with second threads 10 on its surface. First thread grooves 4 are provided between the first threads 5, and second thread grooves 11 are provided between the second threads 10. Crushing teeth 12 are evenly sleeved on the second screw body 8 located in the plasticizing section 2. First gears 7 are sleeved on both ends of the surface of the first screw body 6, and second gears 9 are sleeved on both ends of the surface of the second screw body 8.

[0022] The first gear 7 is meshed and matched with the second gear 9, and the diameter of the first gear 7 is twice that of the second gear 9.

[0023] The cross-section of the first screw body 6 is crescent-shaped, and the first screw body 6 is wrapped outside the second screw body 8.

[0024] The crushing teeth 12 form a 60-degree angle with the second threads 10, the crushing teeth 12 are vertically arranged with respect to the second screw body 8, and the gap between the crushing teeth 12 is one-half of the width of the second thread groove 11.

[0025] The first threads 5 and the second threads 10 are in opposite directions, and the first screw body 6 and the second screw body 8 are matched with each other.

[0026] Both the first screw body 6 and the second screw body 8 are made of 42CrMo alloy material, and the first threads 5, the second threads 10 and the crushing teeth 12 are all made of 42CrMo alloy material.

[0027] The first threads 5 and the second threads 10 are arranged in an interleaved manner.

[0028] Working principle: The material transmission direction is to first enter the feeding section 1, then enter the plasticizing section 2, and finally enter the metering section 3. When the first screw body 6 and the second screw body 8 rotate, through the meshing of the first gear 7 and the second gear 9, the large wheel drives the small wheel, so that the rotation speed of the second screw body 8 is faster than that of the first screw body 6. As the material is transmitted between the first threads 5, the material will enter the position of the second screw body 8 through the first thread groove 4. The second thread 10 on the second screw body 8 will transmit the material in the reverse direction, and at the same time, it will be further crushed through the crushing teeth 12, making it easier to be fully plasticized. The second screw body 8 transmits the material back to the feeding section 1 for repeated circulation. That is, during the transmission of the first screw body 6, there will be materials continuously transmitted from the second screw body 8 to the first screw body 6, making the material plasticized more fully and improving the plasticizing efficiency.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. High-plasticizing double-alloy barrel screw, including a feeding section (1), a plasticizing section (2), a metering section (3), a first screw body (6) and a second screw body (8), characterized in that: The diameter of the first screw body (6) is larger than that of the second screw body (8). The first screw body (6) is evenly equipped with first threads (5) on its surface, and the second screw body (8) is evenly equipped with second threads (10) on its surface. First thread grooves (4) are provided between the first threads (5), and second thread grooves (11) are provided between the second threads (10). Crushing teeth (12) are evenly sleeved on the second screw body (8) in the plasticizing section (2). First gears (7) are sleeved on both ends of the surface of the first screw body (6), and second gears (9) are sleeved on both ends of the surface of the second screw body (8).

2. The high-plasticizing bimetallic barrel and screw according to claim 1, characterized in that: The first gear (7) is in meshing cooperation with the second gear (9), and the diameter of the first gear (7) is twice that of the second gear (9).

3. The highly plasticized bimetallic barrel and screw according to claim 1, characterized in that: The cross-section of the first screw body (6) is crescent-shaped, and the first screw body (6) wraps around the second screw body (8).

4. The high-plasticizing bimetallic barrel and screw according to claim 1, characterized in that: The crushing teeth (12) form a 60-degree angle with the second threads (10), are vertically arranged with respect to the second screw body (8), and the gap between the crushing teeth (12) is one-half of the width of the second thread groove (11).

5. The highly plasticized double alloy barrel screw according to claim 1, characterized in that: The directions of the first threads (5) and the second threads (10) are opposite, and the first screw body (6) and the second screw body (8) cooperate with each other.

6. The high-plasticizing double alloy barrel and screw according to claim 1, characterized in that: Both the first screw body (6) and the second screw body (8) are made of 42CrMo alloy material, and the first threads (5), the second threads (10) and the crushing teeth (12) are all made of 42CrMo alloy material.

7. The highly plasticized bimetallic barrel and screw according to claim 1, wherein: The first threads (5) and the second threads (10) are arranged in an interleaved manner.

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