Conical twin-screw

Abstract

The utility model relates to the field of screws, in particular to a conical twin screw which comprises a machine barrel, a first conical screw, a second conical screw, a liquid bin, liquid injection ports, a first screw bin and a second screw bin, the liquid bin is installed on the upper side of the machine barrel, the liquid injection ports with the same size are formed in the upper side of the liquid bin, and an annular inner cavity is formed in the liquid bin and connected with the inner wall of the machine barrel. A first screw bin and a second screw bin are arranged on the machine barrel, the first screw bin and the second screw bin are attached to each other, a first conical screw is installed in the first screw bin, a second conical screw is installed in the second screw bin, and the first conical screw and the second conical screw are aligned and tightly installed.

Description

Technical Field

[0001] The utility model relates to the field of screws, in particular to a conical twin-screw. Background Art

[0002] The conical twin-screw is a special screw design that plays an important role in the plastics processing industry. The main difference between the conical twin-screw and the parallel twin-screw is that the diameters of the two ends are different. The diameter of the feeding section is larger, while the diameter of the homogenizing section is smaller, and the middle section is a gradual transition. This design gives the conical twin-screw unique advantages in material processing. The uniqueness of the conical twin-screw lies in its meshing design. The two conical screws mesh with each other in the barrel and rotate in opposite directions. This design causes the material to be subjected to strong stirring and shearing when passing through the radial gap between the two screws, thereby achieving uniform plasticization of the material. This characteristic makes the conical twin-screw particularly suitable for processing plastic materials such as PVC. In addition, the conical twin-screw extruder, as an efficient mixing and extrusion equipment, has the characteristics of low shear rate, difficult material decomposition, uniform plasticizing and mixing, stable quality, high output, wide application range and long service life. These characteristics make the conical twin-screw widely used in the plastics processing industry. A Chinese patent discloses a conical twin-screw (authorization announcement number CN 220052823) U) This patented technology can achieve good cooling effect and good working stability by disposing a hollow tube within the rod body. The gap between the hollow tube and the inner wall of the rod body serves as a water outlet channel, and the hollow tube serves as a water inlet channel. After the water enters the inlet pipe, it enters the hollow tube and then flows into the outlet channel, removing the heat from the rod body. However, the hollow tube space of this design is small, the amount of coolant injected is too small, the cooling time is too long and the efficiency is low, and it cannot effectively and timely cool down the body. Therefore, those skilled in the art have provided a conical twin-screw extruder to solve the problems raised in the above background technology. Summary of the Invention

[0003] In order to solve the above technical problems, the utility model provides a conical twin-screw, including a barrel, a No. 1 conical screw, a No. 2 conical screw, a liquid tank, a liquid injection port, a No. 1 screw tank and a No. 2 screw tank. The liquid tank is installed on the upper side of the barrel, and a plurality of liquid injection ports of the same size are provided on the upper side of the liquid tank. An annular inner cavity is provided in the liquid tank to connect the inner wall of the barrel. A No. 1 screw tank and a No. 2 screw tank are provided on the barrel. The No. 1 screw tank and the No. 2 screw tank are fitted together. The No. 1 conical screw is installed in the No. 1 screw tank, and the No. 2 conical screw is installed in the No. 2 screw tank. The No. 1 conical screw and the No. 2 conical screw are aligned and tightly installed.

[0004] Preferably, a No. 1 screw tip is installed on the lower side of the No. 1 conical screw, a No. 1 connecting shaft is installed on the No. 1 conical screw, and a No. 1 fixed shaft is connected and installed on the lower side of the No. 1 connecting shaft;

[0005] Preferably, a conical screw rod No. 1 is connected to and installed on the lower side of the No. 1 fixed shaft, a first screw rib No. 1 is provided on the outer wall of the upper end of the No. 1 conical screw rod, a first screw rib No. 2 is provided on the lower end of the first screw rib No. 1, the first screw rib No. 2 is provided on the outer wall of the No. 1 conical screw rod, a first screw rib No. 3 is provided on the lower end of the first screw rib No. 2, the first screw rib No. 3 is provided on the outer wall of the No. 1 conical screw rod;

[0006] Preferably, a No. 2 screw tip is installed on the lower side of the No. 2 conical screw, a No. 2 connecting shaft is installed on the No. 2 conical screw, and a No. 2 fixed shaft is connected and installed on the lower side of the No. 2 connecting shaft;

[0007] Preferably: the lower side of the No. 2 fixed shaft is connected to and installed with a No. 2 conical screw, the outer wall of the upper end of the No. 2 conical screw is provided with a No. 1 second screw ridge, the lower end of the No. 1 second screw ridge is provided with a No. 2 second screw ridge, the No. 2 second screw ridge is arranged on the outer wall of the No. 2 conical screw, the lower end of the No. 2 second screw ridge is provided with a No. 3 second screw ridge, and the No. 3 second screw ridge is arranged on the outer wall of the No. 2 conical screw.

[0008] The technical effects and advantages of this utility model are:

[0009] 1. The barrel is equipped with a No. 1 screw chamber and a No. 2 screw chamber. The No. 1 screw chamber and the No. 2 screw chamber are fitted together. The No. 1 conical screw is installed in the No. 1 screw chamber, and the No. 2 conical screw is installed in the No. 2 screw chamber. This can improve the extrusion performance of the conical twin screws, thereby improving work efficiency and quality.

[0010] 2. A liquid tank is installed on the upper side of the barrel. There are multiple liquid injection ports of the same size on the upper side of the liquid tank. An annular inner cavity is provided in the liquid tank to connect to the inner wall of the barrel. By injecting coolant into the liquid injection port, the coolant circulates in the liquid tank and flows through the annular inner cavity, so that the No. 1 and No. 2 tapered screws in operation are cooled and the heat on the screws is taken away, thereby increasing the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of a conical twin-screw extruder provided in an embodiment of the present application;

[0012] Figure 2 This is a schematic diagram of the exploded structure of a conical twin-screw provided in an embodiment of the present application;

[0013] Figure 3 This is a schematic diagram of a partial structure of a conical twin-screw provided in an embodiment of the present application;

[0014] Figure 4 This is a schematic diagram of a local explosion structure in a conical twin-screw provided in an embodiment of the present application;

[0015] Figure 5 This is a schematic diagram of a partial cross-sectional structure of a conical twin-screw provided in an embodiment of the present application.

[0016] In the figure: 1. barrel; 2. tapered screw No. 1; 3. tapered screw No. 2; 101. liquid tank; 102. liquid filling port; 103. screw tank No. 1; 104. screw tank No. 2; 201. connecting shaft No. 1; 202. fixed shaft No. 1; 203. first screw ridge No. 1; 204. first screw ridge No. 2; 205. first screw ridge No. 3; 206. screw tip No. 1; 301. connecting shaft No. 2; 302. fixed shaft No. 2; 303. second screw ridge No. 1; 304. second screw ridge No. 2; 305. second screw ridge No. 3; 306. screw tip No. 2. DETAILED DESCRIPTION

[0017] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications. Example

[0018] See also Figures 1 to 5 In this embodiment, a conical twin-screw is provided, comprising a barrel 1, a No. 1 conical screw 2, a No. 2 conical screw 3, a liquid bin 101, a liquid injection port 102, a No. 1 screw bin 103 and a No. 2 screw bin 104. The liquid bin 101 is installed on the upper side of the barrel 1, and a plurality of liquid injection ports 102 of the same size are provided on the upper side of the liquid bin 101. An annular inner cavity is provided in the liquid bin 101 to connect to the inner wall of the barrel 1. A No. 1 screw bin 103 and a No. 2 screw bin 104 are provided on the barrel 1. The No. 1 screw bin 103 and the No. 2 screw bin 104 are fitted together. The No. 1 conical screw 2 is installed in the No. 1 screw bin 103, and the No. 2 conical screw 3 is installed in the No. 2 screw bin 104. The No. 1 conical screw 2 and the No. 2 conical screw 3 are aligned and tightly installed.

[0019] Specifically, a No. 1 connecting shaft 201 is installed on the No. 1 conical screw 2, a No. 1 fixed shaft 202 is connected to and installed on the lower side of the No. 1 connecting shaft 201, and a No. 1 conical screw 2 is connected to and installed on the lower side of the No. 1 fixed shaft 202. A No. 1 first screw rib 203 is provided on the outer wall of the upper end of the No. 1 conical screw 2, a No. 2 first screw rib 204 is provided on the lower end of the No. 1 first screw rib 203, and the No. 2 first screw rib 204 is provided on the outer wall of the No. 1 conical screw 2. A No. 3 first screw rib 205 is provided on the lower end of the No. 2 first screw rib 204, and the No. 3 first screw rib 205 is provided on the outer wall of the No. 1 conical screw 2. A No. 1 screw tip 206 is installed on the lower side of the No. 1 conical screw 2;

[0020] A No. 2 connecting shaft 301 is installed on the No. 2 conical screw 3, a No. 2 fixed shaft 302 is connected and installed on the lower side of the No. 2 connecting shaft 301, a No. 2 fixed shaft 302 is connected and installed on the lower side of the No. 2 conical screw 3, a No. 1 second screw ridge 303 is provided on the outer wall of the upper end of the No. 2 conical screw 3, a No. 2 second screw ridge 304 is provided on the lower end of the No. 1 second screw ridge 303, the No. 2 second screw ridge 304 is arranged on the outer wall of the No. 2 conical screw 3, a No. 3 second screw ridge 305 is provided on the lower end of the No. 2 second screw ridge 304, the No. 3 second screw ridge 305 is arranged on the outer wall of the No. 2 conical screw 3, and a No. 2 screw tip 306 is installed on the lower side of the No. 2 conical screw 3.

[0021] The working principle of this utility model is:

[0022] When using a conical twin-screw, the No. 1 conical screw 2 and the No. 2 conical screw 3 are aligned and tightly installed in the barrel 1, wherein the No. 1 conical screw 2 is installed in the No. 1 screw chamber 103, and the No. 2 conical screw 3 is installed in the No. 2 screw chamber 104. By injecting coolant into the liquid injection port 102, the coolant circulates in the liquid chamber 101 and flows through the annular inner cavity, so that the No. 1 conical screw 2 and the No. 2 conical screw 3 in operation are cooled and taken away, thereby increasing the service life of the device.

[0023] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making any creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in this utility model shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A conical twin-screw extruder, characterized in that: The invention comprises a barrel (1), a first conical screw (2), a second conical screw (3), a liquid bin (101), a liquid injection port (102), a first screw bin (103) and a second screw bin (104), wherein the liquid bin (101) is installed on the upper side of the barrel (1), a plurality of liquid injection ports (102) of the same size are provided on the upper side of the liquid bin (101), an annular inner cavity is provided in the liquid bin (101) and connected to the inner wall of the barrel (1), a first screw bin (103) and a second screw bin (104) are provided on the barrel (1), the first screw bin (103) and the second screw bin (104) are fitted together, the first conical screw (2) is installed in the first screw bin (103), the second conical screw (3) is installed in the second screw bin (104), and the first conical screw (2) and the second conical screw (3) are aligned and tightly installed.

2. A conical twin-screw according to claim 1, characterized in that: A No. 1 connecting shaft (201) is installed on the No. 1 conical screw (2), and a No. 1 fixed shaft (202) is connected and installed on the lower side of the No. 1 connecting shaft (201).

3. A conical twin-screw according to claim 2, characterized in that: A No. 1 conical screw (2) is connected and installed on the lower side of the No. 1 fixed shaft (202), and a No. 1 first screw rib (203) is provided on the outer wall of the upper end of the No. 1 conical screw (2).

4. A conical twin-screw according to claim 3, characterized in that: A second first screw ridge (204) is provided at the lower end of the first screw ridge (203), and the second first screw ridge (204) is provided on the outer wall of the first conical screw (2). A third first screw ridge (205) is provided at the lower end of the second first screw ridge (204), and the third first screw ridge (205) is provided on the outer wall of the first conical screw (2).

5. A conical twin-screw according to claim 4, characterized in that: A No. 1 screw tip (206) is installed on the lower side of the No. 1 conical screw (2).

6. A conical twin-screw according to claim 5, characterized in that: A second connecting shaft (301) is installed on the second conical screw (3), and a second fixed shaft (302) is connected and installed on the lower side of the second connecting shaft (301).

7. A conical twin-screw according to claim 6, characterized in that: A second conical screw (3) is connected and installed on the lower side of the second fixed shaft (302), and a first second screw ridge (303) is provided on the outer wall of the upper end of the second conical screw (3).

8. A conical twin-screw according to claim 7, characterized in that: A second screw ridge (304) is provided at the lower end of the first second screw ridge (303), and the second second screw ridge (304) is provided on the outer wall of the second conical screw (3). A third second screw ridge (305) is provided at the lower end of the second second screw ridge (304), and the third second screw ridge (305) is provided on the outer wall of the second conical screw (3).

9. A conical twin-screw according to claim 8, characterized in that: A second screw tip (306) is mounted on the lower side of the second conical screw (3).

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