A screw extruder for homogeneously mixing

Abstract

The utility model relates to injection molding technical field, concretely relates to a screw extrusion mechanism of even mixing, including machine cylinder, still including the support seat of setting in the machine cylinder outside, the machine cylinder forms the mixing chamber, and the both ends of machine cylinder are provided with injection assembly and drive assembly respectively, still including the screw assembly of horizontal setting in the mixing chamber, be provided with the kneading assembly that cooperates with it at screw assembly, this screw extrusion mechanism of even mixing, through the investment of first feeding cylinder and second feeding cylinder dispersion material, can realize the preheating melting of material of higher melting point and larger quality, and the mixing of multiple materials is convenient simultaneously, fixed kneading block no.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a screw extrusion mechanism for uniform material mixing. Background Technology

[0002] AS+GF material is a composite material of acrylonitrile-styrene copolymer and glass fiber. In its production process, the screw in the injection molding equipment rotates to push the material, and after heating, melting, mixing and degassing of various materials in the barrel, it is finally extruded and molded. It is widely used in the production of plastic pipes, films, profiles and other products.

[0003] The screw extrusion mechanism is the core component of injection molding equipment, ensuring thorough mixing of materials. During operation, the screw thread propels solid material from the feed inlet towards the die head. Combined with barrel heating, the solid material is melted into a uniform melt. The screw assembly then mixes the different components evenly, and finally, the uniform melt is extruded through the die head mold to form a product with a specific cross-section.

[0004] However, in existing screw extrusion mechanisms, due to the different melting points and addition masses of various materials, materials with higher melting points and larger masses require preheating before being fed into the barrel for melting and mixing with other materials. This operation increases the material fusion time and the workload of the operators. Furthermore, the inability to guarantee uniform heating of the materials during preheating also hinders the subsequent uniform mixing of multiple materials. Utility Model Content

[0005] To address the aforementioned issues, a screw extrusion mechanism for uniform mixing is provided. By dispersing the input of materials through the first and second feed cylinders, it is possible to preheat and melt materials with high melting points and large masses, facilitating the mixing of multiple materials. Meanwhile, the fixed kneading blocks one and two, in conjunction with the movable kneading block that can float back and forth under the action of the material, achieve a complementary advantage of stable shearing and dynamic adaptation. This ensures mixing accuracy, enhances the equipment's adaptability to different materials, and further improves the uniformity of mixing different materials.

[0006] To address the problems of existing technologies, this utility model provides a screw extrusion mechanism for uniform mixing, including a barrel and a support seat disposed on the outside of the barrel. The barrel forms a mixing chamber, and an injection assembly and a drive assembly are respectively disposed at both ends of the barrel. It also includes a screw assembly horizontally arranged in the mixing chamber, and a kneading component that cooperates with the screw assembly is provided therewith; It also includes a first feed cylinder, a second feed cylinder, and an exhaust valve installed sequentially above the barrel. The bottoms of the first feed cylinder, the second feed cylinder, and the exhaust valve all extend vertically downwards to communicate with the mixing chamber. The kneading assembly is provided in two sets, which are located between the second feed cylinder and the exhaust valve and between the exhaust valve and the injection assembly, respectively. The screw assembly includes a first screw column, a second screw column, and a third screw column arranged sequentially in the mixing chamber. The two sets of kneading components are also located at both ends of the second screw column, with the second screw column located directly below the exhaust valve. The first screw column is located directly below the first feed cylinder and the second feed cylinder.

[0007] Preferably, the kneading assembly includes a movable kneading block and a fixed kneading block one and a fixed kneading block two located at both ends of the movable kneading block. The fixed kneading block one and the fixed kneading block two are respectively provided with a movable groove one and a movable groove two horizontally recessed on their adjacent sides. The two ends of the movable kneading block extend laterally to the movable groove one and the movable groove two to form extensions.

[0008] Preferably, magnetic blocks are fixedly installed on the inner walls of the bottom of both the movable groove one and the movable groove two, and strong magnetic blocks are fixedly installed on both ends of the movable kneading block. The magnetic blocks on the movable groove one are opposite in magnetism to the side adjacent to the magnetic blocks on the movable groove one, and the magnetic blocks on the movable groove two are the same in magnetism to the side adjacent to the magnetic blocks on the movable groove one.

[0009] Preferably, the outer wall of the extension protrudes outward to form a guide strip, and the inner walls of the first movable groove and the second movable groove extend vertically to form guide grooves that cooperate with the guide strip.

[0010] Preferably, both the second and third screws are provided with connecting keys at their ends, and both of the two fixed kneading blocks are provided with keyways that mate with the connecting keys.

[0011] Preferably, both the second screw post and the first screw post have mounting blocks at their ends facing the third screw post, and both of the fixing and pinching blocks and the ends of the second screw post and the first screw post facing the third screw post have mounting grooves that mate with the mounting blocks.

[0012] Preferably, the power output end of the drive assembly is connected to the first screw post, and the third screw post extends horizontally to the injection assembly.

[0013] The advantages of this utility model compared to the prior art are: 1. By sequentially setting a first feed cylinder and a second feed cylinder at the barrel to allow for the input of dispersed materials, it is possible to preheat and melt materials with high melting points and large masses, which facilitates the mixing of various materials. At the same time, the dispersed kneading components further shear, break and fuse the materials, which further promotes the fusion of materials, thereby achieving the effect of uniform mixing of materials with different melting points.

[0014] 2. The fixed kneading block one and fixed kneading block two, together with the movable kneading block that can float back and forth under the action of material, can achieve the complementary advantages of stable shearing and dynamic adaptation. This not only ensures the mixing accuracy, but also improves the equipment's adaptability to different materials, and further improves the uniformity of mixing different materials. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a screw extrusion mechanism for uniform material mixing.

[0016] Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the barrel of a screw extrusion mechanism for uniformly mixing materials.

[0017] Figure 3 This is a three-dimensional structural diagram of the kneading component of a screw extrusion mechanism for uniformly mixing materials.

[0018] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the kneading component of a screw extrusion mechanism for uniform mixing.

[0019] Figure 5 This is a schematic diagram of a partial cross-sectional structure of the kneading component of a screw extrusion mechanism for uniform mixing.

[0020] Figure 6 This is a three-dimensional structural diagram of a screw assembly in a screw extrusion mechanism for uniformly mixing materials.

[0021] Figure 7 This is a schematic diagram of the disassembled structure of the kneading component of a screw extrusion mechanism for uniform mixing.

[0022] The following are the labels in the diagram: 1. Barrel; 1a. First feed barrel; 1b. Second feed barrel; 1c. Exhaust valve; 2. Injection assembly; 3. Drive assembly; 4. Screw assembly; 4a. First screw post; 4b. Second screw post; 4c. Third screw post; 4d. Connecting key; 4e. Mounting block; 5. Kneading assembly; 5a. Movable kneading block; 5b. Fixed kneading block one; 5c. Fixed kneading block two; 5d. Magnetic block one; 5e. Magnetic block two. Detailed Implementation

[0023] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0024] See Figure 1-2 As shown, a screw extrusion mechanism for uniform mixing includes a barrel 1 and a support seat disposed on the outside of the barrel 1. The barrel 1 forms a mixing chamber, and an injection assembly 2 and a drive assembly 3 are respectively disposed at both ends of the barrel 1. It also includes a screw assembly 4 horizontally arranged in the mixing chamber, and a kneading component 5 that cooperates with the screw assembly 4.

[0025] The power output end of the drive assembly 3 is connected to the first screw post 4a, and the third screw post 4c extends horizontally to the injection assembly 2.

[0026] It should be noted that the drive assembly 3 consists of a drive motor, a reduction gear used in conjunction with the drive motor, and a coupling connecting the output end of the reduction gear to the screw assembly 4. During operation, material is fed into the barrel 1. The drive motor, through the reduction gear and its end coupling, drives the screw assembly 4 to rotate. The screw assembly 4 then pushes the material along the mixing chamber to the kneading assembly 5 for shearing and breaking, and continues to push and blend it until the material is pushed to the injection assembly 2 for injection. A heating assembly is installed at the barrel 1 to continuously heat and mix the moving and mixing material.

[0027] See Figure 1 and Figure 2 As shown, it also includes a first feed cylinder 1a, a second feed cylinder 1b and an exhaust valve 1c installed sequentially above the barrel 1. The bottoms of the first feed cylinder 1a, the second feed cylinder 1b and the exhaust valve 1c all extend vertically downward to communicate with the mixing chamber.

[0028] It should be noted that the first feed cylinder 1a and the second feed cylinder 1b are used for feeding different materials. The material fed into the first feed cylinder 1a will stay in the mixing chamber for a longer time, allowing for better heating and melting, which facilitates mixing with the material fed into the second feed cylinder 1b. Simultaneously, after the material fed into the first feed cylinder 1a mixes with the material fed into the second feed cylinder 1b, the heat carried by the first feed cylinder 1a can further accelerate the melting of the material fed into the second feed cylinder 1b, thereby improving the mixing efficiency.

[0029] The exhaust valve 1c is used to discharge excess gas during material mixing, preventing excessive air bubbles in subsequent production products from affecting product quality.

[0030] See Figure 2As shown, there are two sets of kneading components 5, which are located between the second feed cylinder 1b and the exhaust valve 1c and between the exhaust valve 1c and the injection component 2, respectively.

[0031] It should be noted that the setting of the two sets of kneading components 5 and the position setting of the exhaust valve 1c can achieve the effect of preliminary mixing of materials and exhausting the gas before mixing. This not only removes excess gas during the mixing process, but also promotes further mixing of materials and improves the uniformity of the mixed materials.

[0032] See Figure 2 and Figure 6 As shown, the screw assembly 4 includes a first screw column 4a, a second screw column 4b and a third screw column 4c arranged sequentially in the mixing chamber. The two sets of kneading components 5 are also located at both ends of the second screw column 4b, and the second screw column 4b is located directly below the exhaust valve 1c. The first screw column 4a is located directly below the first feed cylinder 1a and the second feed cylinder 1b.

[0033] It should be noted that the first screw 4a is used to transport the material fed into the first feed cylinder 1a to the material fed into the second feed cylinder 1b. The second screw 4b is used to mix the material fed into the first feed cylinder 1a and the material fed into the second feed cylinder 1b, and cooperates with the kneading component 5 to improve the mixing effect. The third screw 4c is used to transport the mixed material to the injection component 2.

[0034] See Figure 2-4 As shown, the kneading component 5 includes a movable kneading block 5a, and a fixed kneading block 1 5b and a fixed kneading block 2 5c located at both ends of the movable kneading block 5a. The fixed kneading block 1 5b and the fixed kneading block 2 5c are respectively provided with a movable groove 1 and a movable groove 2 horizontally recessed on their adjacent sides. The two ends of the movable kneading block 5a extend laterally to the movable groove 1 and the movable groove 2 to form extensions.

[0035] It should be noted that the design of movable slot one and movable slot two allows the movable kneading block 5a to move back and forth along both.

[0036] See Figure 4 and Figure 7 As shown, magnetic blocks 5d are fixedly installed on the inner walls of the bottom of both the first and second movable slots. Strong magnetic blocks 5e are fixedly installed at both ends of the movable kneading block 5a. The magnetic blocks 5e in the first movable slot have opposite magnetic properties to the magnetic blocks 5d on the side adjacent to them, while the magnetic blocks 5e in the second movable slot have the same magnetic properties to the magnetic blocks 5d on the side adjacent to them.

[0037] It should be noted that when the material pushes the movable kneading block 5a, the movable kneading block 5a will move towards the movable slot 2 under the action of the material. At this time, due to the repulsive force generated by the magnetic attraction of the magnetic block 2 5e of the movable slot 2 and the magnetic block 1 5d on the adjacent side having the same magnetism, and the attractive force generated by the magnetic attraction of the magnetic block 2 5e of the movable slot 1 and the magnetic block 1 5d on the adjacent side having opposite magnetism, the movable kneading block 5a will be pushed in the opposite direction and tend to move towards the movable slot 1. This, in turn, will work with the pushing force of the material to produce a back-and-forth floating effect.

[0038] The active kneading block 5a can increase the contact range with the material when it floats, and better shear and mix the material under the action of the reverse force. At the same time, it can also break the inertia of the material during the pushing process, so as to achieve a better crushing effect on the material.

[0039] See Figure 4 , Figure 5 and Figure 7 As shown, the outer wall of the extension protrudes outward to form a guide strip 5a1, and the inner walls of the movable groove one and the movable groove two extend vertically to form guide grooves that cooperate with the guide strip 5a1.

[0040] It should be noted that the guide groove of the guide bar 5a1 is used to drive the movable kneading block 5a to rotate synchronously with the fixed kneading block 1 5b and the fixed kneading block 2 5c.

[0041] See Figure 4-7 As shown, the ends of the second screw post 4b and the third screw post 4c are both provided with connecting keys 4d, and both of the fixed kneading blocks 5c are provided with keyways that cooperate with the connecting keys 4d.

[0042] The ends of the second screw post 4b and the first screw post 4a facing the third screw post 4c are each provided with a mounting block 4e. The ends of the two fixing pinch blocks 5b and the ends of the second screw post 4b and the first screw post 4a facing the third screw post 4c are each provided with mounting grooves that cooperate with the mounting block 4e.

[0043] It should be noted that the connection between the connecting key 4d and the keyway, as well as the connection between the mounting block 4e and the mounting groove, both require the use of fixing bolts.

[0044] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A screw extrusion mechanism for uniform mixing, comprising a barrel (1), characterized in that, It also includes a support seat disposed on the outside of the barrel (1), the barrel (1) having a mixing chamber, and an injection assembly (2) and a drive assembly (3) disposed at both ends of the barrel (1). It also includes a screw assembly (4) horizontally arranged in the mixing chamber, and a kneading component (5) that cooperates with the screw assembly (4). It also includes a first feed cylinder (1a), a second feed cylinder (1b) and an exhaust valve (1c) installed sequentially above the barrel (1). The bottoms of the first feed cylinder (1a), the second feed cylinder (1b) and the exhaust valve (1c) all extend vertically downward to communicate with the mixing chamber. The kneading assembly (5) is provided in two sets, and the two sets of kneading assemblies (5) are respectively located between the second feed cylinder (1b) and the exhaust valve (1c) and between the exhaust valve (1c) and the injection assembly (2); The screw assembly (4) includes a first screw column (4a), a second screw column (4b) and a third screw column (4c) arranged sequentially in the mixing chamber. The two sets of kneading assemblies (5) are also located at both ends of the second screw column (4b) and the second screw column (4b) is located directly below the exhaust valve (1c). The first screw column (4a) is located directly below the first feed cylinder (1a) and the second feed cylinder (1b).

2. The screw extrusion mechanism for uniform mixing according to claim 1, characterized in that, The kneading component (5) includes a movable kneading block (5a) and a fixed kneading block one (5b) and a fixed kneading block two (5c) located at both ends of the movable kneading block (5a). The fixed kneading block one (5b) and the fixed kneading block two (5c) are respectively provided with a movable groove one and a movable groove two horizontally recessed on their adjacent sides. The two ends of the movable kneading block (5a) extend laterally to the movable groove one and the movable groove two to form extensions.

3. The screw extrusion mechanism for uniform mixing according to claim 2, characterized in that, A magnetic block 1 (5d) is fixedly installed on the inner wall of the bottom of both the movable groove 1 and the movable groove 2. A strong magnetic block 2 (5e) is fixedly installed at both ends of the movable kneading block (5a). The magnetic block 2 (5e) in the movable groove 1 has opposite magnetism to the magnetic block 1 (5d) on the side adjacent to it, while the magnetic block 2 (5e) in the movable groove 2 has the same magnetism to the magnetic block 1 (5d) on the side adjacent to it.

4. The screw extrusion mechanism for uniform mixing according to claim 2, characterized in that, The outer wall of the extension protrudes outward to form a guide strip (5a1), and the inner walls of the movable groove one and the movable groove two extend vertically to form guide grooves that cooperate with the guide strip (5a1).

5. The screw extrusion mechanism for uniform mixing according to claim 2, characterized in that, Both the second screw post (4b) and the third screw post (4c) are provided with connecting keys (4d) at their ends, and both of the fixed kneading blocks (5c) are provided with keyways that mate with the connecting keys (4d).

6. The screw extrusion mechanism for uniform mixing according to claim 2, characterized in that, The ends of the second screw post (4b) and the first screw post (4a) facing the third screw post (4c) are provided with mounting blocks (4e). The ends of the two fixed pinch blocks (5b) and the ends of the second screw post (4b) and the first screw post (4a) facing the third screw post (4c) are provided with mounting grooves that cooperate with the mounting blocks (4e).

7. The screw extrusion mechanism for uniform mixing according to claim 1, characterized in that, The power output end of the drive assembly (3) is connected to the first screw post (4a), and the third screw post (4c) extends horizontally to the injection assembly (2).

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