Injection molding machine injection screw

Abstract

The utility model provides an injection molding machine injection molding screw rod relates to injection molding machine technical field, including main screw rod and the vice screw rod who is located in its end surface position, be provided with the stirring shaft between the position of main screw rod and vice screw rod, the both ends of stirring shaft are assembled and connected with main screw rod, vice screw rod through bolt, the end surface side fixed ring board of main screw rod away from stirring shaft, the end surface fixed connecting column of ring board away from main screw rod, the end surface of connecting column away from ring board is provided with rotating shaft, the end surface fixed assembly cylinder of sleeve in connecting column of rotating shaft, the surface side of ring board is equipped with two groups of square mouth along ring board peripheral wall and is annularly distributed, the end surface fixed arc plate of two groups of insertion in square mouth inside and with main screw rod surface wall meets of assembly cylinder. The device solves the mixing effect of current single screw rod structure to raw material is limited, is easy to cause temperature, viscosity and composition distribution uneven, the existing screw rod and drive shaft are usually integral type or complex connection structure, when replacing, need to disassemble the whole assembly, the problem of time -consuming and labor -intensive.

Description

Technical Field

[0001] This utility model belongs to the technical field of injection molding machines, and in particular relates to an injection screw for an injection molding machine. Background Technology

[0002] The injection screw is one of the most core and critical components of injection molding equipment. Its performance directly determines the quality of the molten plastic, the uniformity of plasticization, the precision of injection, and the quality and production efficiency of the final product. Currently, injection screws have evolved from relatively simple molten material conveyors into precision engineering technologies integrating fluid mechanics, heat transfer, materials science, and mechanical design. The design of the injection screw directly affects the efficiency, energy consumption, stability, product quality, and raw material adaptability of injection molding production. With advancements in materials science and increasingly demanding product requirements, the design of injection screws continues to innovate and optimize, developing towards specialization, high performance, high energy efficiency, and intelligent operation.

[0003] Traditional single-screw structures have limited mixing effects on raw materials, easily leading to uneven distribution of temperature, viscosity, and composition. Existing screws and drive shafts are usually integral or have complex connections, requiring the entire assembly to be disassembled for replacement, which is time-consuming and labor-intensive. This phenomenon has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to address the problems mentioned in the background art by using a main screw, a stirring shaft, and a secondary screw in conjunction with existing injection molding machine screws to improve mixing efficiency. Furthermore, the detachable connection between the main screw and the rotating shaft allows for quick assembly and disassembly.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems does not include:

[0006] An injection molding machine screw includes a main screw and an auxiliary screw located at its end face. A stirring shaft is disposed between the main screw and the auxiliary screw. Both ends of the stirring shaft are assembled and connected to the main screw and the auxiliary screw. A ring plate is fixed to the surface of the main screw away from the stirring shaft. A connecting post is fixed to the surface of the ring plate away from the main screw. A rotating shaft is disposed on the surface of the connecting post away from the ring plate. An assembly cylinder sleeved on the connecting post is fixed to the end face of the rotating shaft. Two sets of square openings are evenly distributed in a ring along the circumference of the ring plate. Two sets of arc plates are fixed to the end face of the assembly cylinder, which are respectively inserted into the square openings and connected to the surface wall of the main screw. The arc plates are assembled and connected to the main screw through a set assembly rod.

[0007] This technical solution further explains that the end face of the main screw connected to the stirring shaft has a cross-shaped opening one, and the end face of the auxiliary screw connected to the stirring shaft has a cross-shaped opening two. Both ends of the stirring shaft are fixed with cross-shaped posts that are respectively inserted into the cross-shaped opening one and the cross-shaped opening two.

[0008] This technical solution further explains that the main screw has a through-hole that communicates with the inside of the two sets of square openings, and the two sets of arc plates have a through-hole that communicates with the inside of the through-hole. The assembly rod is inserted into the assembly hole, and both ends of the assembly rod are inserted into the positioning hole.

[0009] This technical solution further explains that the surface wall of the assembly cylinder is provided with an annular groove, and the surface wall of the assembly cylinder is fitted with a movable ring and a locking ring located in the annular groove. The end face of the movable ring is fixed with two sets of sealing plates that are respectively inserted into the square opening and connected to the surface wall of the arc plate.

[0010] This technical solution further explains that the moving ring is located between the locking ring and the ring plate, the locking ring and the assembly plate are connected by bolts, and a spring sleeved on the assembly cylinder is fixed between the locking ring and the ring plate.

[0011] This technical solution further explains that a flange is fixed to the end face of the rotating shaft away from the assembly cylinder.

[0012] This technical solution further explains that the outer side wall of the connecting column has multiple sets of strip-shaped openings evenly distributed in a ring along the circumference, and the inner wall of the assembly cylinder has multiple sets of strip-shaped blocks inserted into the strip-shaped openings.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention uses a rotating shaft to drive the main screw to rotate synchronously. The main screw pushes the raw material to the position of the stirring shaft, where the raw material is stirred again, making it more thoroughly mixed and then entering the position of the auxiliary screw. The auxiliary screw gradually pushes the raw material out. Since the pitch density of the auxiliary screw is smaller than that of the main screw, it provides a higher compression ratio to the raw material. Under the high pressure and high shear of the auxiliary screw, the material is further homogenized, ensuring that the temperature, viscosity and composition distribution are extremely uniform.

[0015] By removing the assembly rod from inside the positioning hole and the assembly hole, the assembly rod no longer confines the arc plate in the square opening, thereby controlling the increase of the distance between the main screw and the rotating shaft. The assembly cylinder is then moved directly off the connecting column, thus separating the main screw and the rotating shaft. This allows for the separation of the main screw and the rotating shaft, improving the efficiency of disassembly and replacement. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0018] Figure 3 This is a structural diagram of the main screw in this utility model;

[0019] Figure 4 This is a structural diagram of the auxiliary screw in this utility model;

[0020] Figure 5 This is a structural diagram of the stirring shaft in this utility model;

[0021] Figure 6 This is an exploded view of the rotating shaft and the moving ring in this utility model.

[0022] In the diagram: 1. Main screw; 101. Crosshead 1; 102. Ring plate; 103. Connecting column; 104. Strip opening; 105. Assembly hole; 106. Square opening; 2. Rotating shaft; 201. Flange; 202. Assembly cylinder; 203. Ring groove; 204. Strip block; 205. Arc plate; 206. Assembly rod; 207. Positioning hole; 3. Stirring shaft; 301. Assembly plate; 302. Crosshead column; 4. Secondary screw; 401. Crosshead 2; 5. Moving ring; 501. Sealing plate; 502. Spring; 503. Locking ring. Detailed Implementation

[0023] The present invention will be further described in a non-limiting manner below with reference to preferred embodiments and accompanying drawings.

[0024] like Figure 1-6 As shown, the technical solution provided by this utility model is as follows:

[0025] The injection screw of the injection molding machine includes a main screw 1 and a secondary screw 4 located at its end face. A stirring shaft 3 is arranged between the main screw 1 and the secondary screw 4. The two ends of the stirring shaft 3 are connected to the main screw 1 and the secondary screw 4 by bolts. A ring plate 102 is fixed to the surface of the end face of the main screw 1 away from the stirring shaft 3. A connecting post 103 is fixed to the end face of the ring plate 102 away from the main screw 1. A rotating shaft 2 is arranged on the end face of the connecting post 103 away from the ring plate 102. An assembly cylinder 202 is fixed to the end face of the rotating shaft 2 and sleeved on the connecting post 103. Two sets of square openings 106 are evenly distributed in a ring along the circumference of the ring plate 102. Two sets of assembly cylinders 202 are fixed to the end face and inserted into the square openings 106 respectively. The arc plate 205 is connected to the surface wall of the main screw 1. The arc plate 205 is connected to the main screw 1 by the assembly rod 206. The surface wall of the main screw 1 is provided with an assembly hole 105 that communicates with the inside of the two sets of square openings 106. The surface walls of the two sets of arc plates 205 are provided with positioning holes 207 that communicate with the inside of the assembly holes 105. The assembly rod 206 is inserted into the assembly hole 105, and both ends of the assembly rod 206 are inserted into the positioning holes 207. The end face of the rotating shaft 2 away from the assembly cylinder 202 is fixed with a flange 201. The side wall of the connecting column 103 is provided with multiple sets of strip openings 104 that are evenly distributed in a ring along the circumference. The inner wall of the assembly cylinder 202 is fixed with multiple sets of strip blocks 204 that are inserted into the strip openings 104.

[0026] With the above-described structure, the entire device is installed in the injection molding box. The rotating shaft 2 is connected to the injection molding box via bearings. When the injection molding material is poured into the injection molding box, it is connected to the external motor shaft via flange 201. When the motor is working, it drives the main screw 1 to rotate synchronously via the rotating shaft 2. The main screw 1 pushes the material to the position of the stirring shaft 3. The stirring shaft 3 further stirs the material, making it more fully mixed and allowing it to enter the position of the auxiliary screw 4. The auxiliary screw 4 will gradually push the material out. Since the pitch density of the auxiliary screw 4 is smaller than that of the main screw 1, it provides a higher compression ratio for the material. Under the high pressure and high shear of the auxiliary screw 4, the material is further homogenized, ensuring that the temperature, viscosity and composition distribution are extremely uniform.

[0027] When it is necessary to disassemble and separate the main screw 1 from the rotating shaft 2, the assembly rod 206 is removed from inside the positioning hole 207 and the assembly hole 105. The assembly rod 206 no longer limits the arc plate 205 in the square opening 106, thereby controlling the increase of the distance between the main screw 1 and the rotating shaft 2. The assembly cylinder 202 is then moved directly out of the connecting column 103, thereby separating the main screw 1 from the rotating shaft 2. This facilitates the separation of the main screw 1 from the rotating shaft 2 and improves the efficiency of disassembly and replacement.

[0028] The main screw 1 has a cross-shaped opening 101 on its end face connected to the stirring shaft 3, and the auxiliary screw 4 has a cross-shaped opening 401 on its end face connected to the stirring shaft 3. Both ends of the stirring shaft 3 are fixed with cross-shaped posts 302 that are respectively inserted into the cross-shaped opening 101 and the cross-shaped opening 401.

[0029] With the above structure, the stirring shaft 3 is positioned between the main screw 1 and the auxiliary screw 4, allowing the cross shafts at both ends of the stirring rod to be inserted into cross-shaped opening 101 and cross-shaped opening 401 respectively. When the main screw 1 rotates, it will drive the stirring shaft 3 and the auxiliary screw 4 to rotate synchronously. Through the cooperation between the cross-shaped column 302 and the main screw 1 and the auxiliary screw 4, a large torque force can be provided to ensure that the auxiliary screw 4 and the stirring rod can rotate stably.

[0030] The surface wall of the assembly cylinder 202 is provided with an annular groove 203. The surface wall of the assembly cylinder 202 is fitted with a movable ring 5 and a locking ring 503 located in the annular groove 203. The end face of the movable ring 5 is fixed with two sets of sealing plates 501 that are respectively inserted into the square opening 106 and connected to the surface wall of the arc plate 205. The movable ring 5 is located between the locking ring 503 and the annular plate 102. The locking ring 503 is connected to the assembly plate 301 by bolts. A spring 502 fitted on the assembly cylinder 202 is fixed between the locking ring 503 and the annular plate 102.

[0031] With the above structure, when the arc plate 205 is in the square opening 106, the moving ring 5 is released, and the spring 502 pushes the moving ring 5, making the moving ring 5 stably contact the side of the ring plate 102, so that the sealing plate 501 is stably inserted into the square opening 106. Thus, the sealing plate 501 will cover the arc plate 205 and the positioning hole 207 on the surface of the arc plate 205, thereby covering the assembly rod 206, preventing the assembly rod 206 from coming out of the positioning hole 207 and the assembly hole 105. The assembly rod 206 needs to be removed from inside the positioning hole 207 and the assembly hole 105. When removing the sealing plate 501 from inside the square opening 106, the positioning hole 207 is exposed, and the assembly rod 206 can be pulled out directly. When the sealing plate 501 is removed from the square opening 106, the moving ring 5 is controlled to move towards the locking ring 503. The moving ring 5 compresses the spring 502. When the locking ring 503 is connected to the assembly cylinder 202 by bolts, it can be ensured that the locking ring 503 will not easily rotate on the assembly cylinder 202, and that the moving ring 5 will not rotate inside the ring groove 203, thereby ensuring that the sealing plate 501 can be stably aligned with the position of the square opening 106.

[0032] Finally, it should be noted that the above are merely preferred embodiments for illustrating the technical solutions of this utility model, and not for limiting it. Those skilled in the art can modify or make equivalent substitutions to the technical solutions described in the foregoing embodiments, and such modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An injection molding machine injection molding screw characterized by: The system includes a main screw (1) and a secondary screw (4) located at its end face. A stirring shaft (3) is positioned between the main screw (1) and the secondary screw (4). Both ends of the stirring shaft (3) are assembled and connected to the main screw (1) and the secondary screw (4). A ring plate (102) is fixed to the end face of the main screw (1) away from the stirring shaft (3). A connecting post (103) is fixed to the end face of the ring plate (102) away from the main screw (1). A [missing information] is provided on the end face of the connecting post (103) away from the ring plate (102). A rotating shaft (2) has an assembly cylinder (202) fixed on its end face and sleeved on a connecting column (103). The outer side of the ring plate (102) has two sets of square openings (106) evenly distributed in a ring along the circumference of the ring plate (102). The end face of the assembly cylinder (202) has two sets of arc plates (205) that are respectively inserted into the square openings (106) and connected to the outer wall of the main screw (1). The arc plates (205) are assembled and connected to the main screw (1) through the assembly rods (206).

2. The injection screw for an injection molding machine according to claim 1, characterized in that: The main screw (1) has a cross-shaped opening (101) on its end face connected to the stirring shaft (3), and the auxiliary screw (4) has a cross-shaped opening (401) on its end face connected to the stirring shaft (3). Both ends of the stirring shaft (3) are fixed with cross-shaped posts (302) that are respectively inserted into the cross-shaped opening (101) and the cross-shaped opening (401).

3. The injection screw for an injection molding machine according to claim 1, characterized in that: The main screw (1) has a through-hole (105) that communicates with the interior of the two sets of square openings (106). The two sets of arc plates (205) have a through-hole (207) that communicates with the interior of the through-hole (105). The assembly rod (206) is inserted into the assembly hole (105), and both ends of the assembly rod (206) are inserted into the positioning hole (207).

4. The injection screw for an injection molding machine according to claim 1, characterized in that: The surface wall of the assembly cylinder (202) is provided with an annular groove (203). The surface wall of the assembly cylinder (202) is fitted with a movable ring (5) and a locking ring (503) located in the annular groove (203). The end face of the movable ring (5) is fixed with two sets of sealing plates (501) that are respectively inserted into the square opening (106) and connected to the surface wall of the arc plate (205).

5. The injection screw for an injection molding machine according to claim 4, characterized in that: The movable ring (5) is located between the locking ring (503) and the ring plate (102). The locking ring (503) is connected to the assembly plate (301) by bolts. A spring (502) sleeved on the assembly cylinder (202) is fixed between the locking ring (503) and the ring plate (102).

6. The injection screw for an injection molding machine according to claim 1, characterized in that: A flange (201) is fixed to the end face of the rotating shaft (2) away from the assembly cylinder (202).

7. The injection screw for an injection molding machine according to claim 1, characterized in that: The outer side wall of the connecting column (103) has multiple sets of strip-shaped openings (104) evenly distributed in a ring along the periphery, and the inner wall of the assembly cylinder (202) has multiple sets of strip-shaped blocks (204) inserted into the strip-shaped openings (104).

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