Multi-section type screw rod structure for exhaust type injection molding machine

Abstract

The utility model discloses a multi-section type screw rod structure for an exhaust type injection molding machine, which relates to the technical field of screw rods of injection molding machines, and comprises a screw rod component and a machine barrel component matched with the screw rod component, the screw rod component comprises a transmission shaft section, a melt glue stroke section, a plasticizing section, a mixing section, an exhaust section and a glue passing head which are integrally connected, and the transmission shaft section, the glue melting stroke section, the plasticizing section, the mixing section, the exhaust section and the glue passing head are sequentially arranged in the screw conveying direction of the screw component. According to the design, based on horizontal and vertical screw propulsion of the screw rods of the plasticizing section and the mixing section on the screw component on the injection molding material, on one hand, the screw propulsion effects in different directions can be achieved, and on the other hand, the screw propulsion effects under different thrust can be achieved, so that the injection molding material is extruded and propelled more compactly; and then the air in the injection molding material is dynamically extruded and discharged under the re-extrusion and compaction of the screw rod on the exhaust section, so that the exhaust of the screw rod is more efficient and comprehensive.

Description

Technical Field

[0001] The utility model relates to the field of injection molding machine screws, in particular to a multi-stage screw structure for an exhaust type injection molding machine. Background Technique

[0002] The exhaust screw injection molding machine is a widely used injection molding device at present, which has the advantages of improving production efficiency, reducing the pre-drying process, improving product quality and safety, etc.; when the screw injection molding machine is working, granular or powdery plastic is added into the injection barrel, and then the plastic is made into a molten state through a heating structure, and then the plastic is pushed forward by the rotation of the screw, so that the plastic is ejected from the nozzle at a very high pressure and speed. Its screw, as the core component of the injection molding machine, is an important thrust facility for plastic extrusion molding. As shown in an exhaust screw of an injection molding machine disclosed on the Chinese Patent Network (Publication No. CN217454818U), such a device uses the extrusion of the screw on the injection plastic to extrude and form the injection plastic and eject it.

[0003] However, for the exhaust screws adopted in the above-mentioned public patents and the existing market, there are still some deficiencies: for the screw structure with an existing equal-pitch form, when it helically extrudes and advances the injection plastic, since the injection plastic always maintains the same helical extrusion pressure from the inlet to the outlet, the variable of the injection plastic in the helical conveying is small, and the air inside the injection plastic often cannot achieve a comprehensive evacuation effect. Therefore, the technical personnel in this field provide a multi-stage screw structure for an exhaust type injection molding machine to solve the problems raised in the above background technique. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a multi-stage screw structure for an exhaust type injection molding machine, which solves the problem that the existing exhaust screw structure in the above background technique is not efficient enough in evacuating the air in the injection plastic.

[0005] To achieve the above purposes, the utility model is realized through the following technical solutions: A multi-stage screw structure for an exhaust type injection molding machine includes a screw component and a barrel component that matches the screw component;

[0006] The screw component includes a transmission shaft section, a plasticizing stroke section, a plasticizing section, a mixing section, an exhaust section, and a nozzle head that are integrally connected, and the transmission shaft section, the plasticizing stroke section, the plasticizing section, the mixing section, the exhaust section, and the nozzle head are arranged in sequence along the screw conveying direction of the screw component;

[0007] The barrel component includes a barrel body and an extrusion die that are integrally connected, and the barrel body and the extrusion die respectively correspond to the screw section and the nozzle head section of the screw component.

[0008] As a further technical solution of the present utility model: the plasticizing section, the kneading section, and the exhaust section are all in the form of spiral rods with the screw component as the axis.

[0009] As a further technical solution of the present utility model: the spiral auger of the plasticizing section is arranged horizontally along the axial direction of the screw component, and the spiral auger of the kneading section is arranged vertically along the axial direction of the screw component.

[0010] As a further technical solution of the present utility model: the pitch of the exhaust section is smaller than the pitch of the plasticizing section.

[0011] As a further technical solution of the present utility model: the glue head includes an axle collar, a shaft sleeve, and a glue head body, and the axle collar, the shaft sleeve, and the glue head body are arranged in sequence along the axial direction of the screw component.

[0012] As a further technical solution of the present utility model: the glue head body includes a conical glue head and an assembly screw that is screwed and fixedly connected to the screw component.

[0013] As a further technical solution of the present utility model: a feed port opposite to the butting end of the melt glue travel section and the plasticizing section is opened on one side of the barrel body of the barrel, and an exhaust port opposite to the exhaust section is opened on the other side of the barrel body of the barrel.

[0014] As a further technical solution of the present utility model: the extrusion die includes a machine head, a core sleeve, and an extrusion head. The core sleeve is screwed to the discharge port of the machine head, and the extrusion head is screwed to the discharge port of the core sleeve.

[0015] The present utility model provides a multi-stage screw structure for an exhaust type injection molding machine, which has the following beneficial effects compared with the prior art:

[0016] In the multi-stage exhaust type screw structure of this design, during the process of the screw component being used in conjunction with the barrel component, based on the horizontal and vertical spiral propulsion of the injection material by the spiral rods of the plasticizing section and the kneading section on the screw component, on the one hand, it can play a spiral propulsion role in different directions, improving the comprehensiveness of the spiral propulsion and mixing of the injection material. On the other hand, it can play a spiral propulsion role under different thrusts, making the injection material more tightly extruded and propelled, and at the same time fully turning and stirring the injection material. Then, under the repeated extrusion and compaction of the spiral rod on the exhaust section, the air inside the injection material is dynamically extruded and discharged. Its screw exhaust is more efficient and comprehensive, suitable for more types of plastic injection molded products, and adaptable to a variety of material processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a multi-stage screw structure for an exhaust type injection molding machine;

[0018] Figure 2It is a schematic structural diagram of a screw component in a multi-stage screw structure for an exhaust injection molding machine;

[0019] Figure 3 It is a schematic structural diagram of a barrel component in a multi-stage screw structure for an exhaust injection molding machine.

[0020] In the figure: 1. Screw component; 11. Drive shaft section; 12. Melting stroke section; 13. Plasticizing section; 14. Kneading section; 15. Exhaust section; 16. Nozzle head; 161. Collar; 162. Bush; 163. Nozzle head body; 1631. Conical nozzle head; 1632. Assembled screw; 2. Barrel component; 21. Barrel body; 211. Feeding port; 212. Exhaust port; 22. Extrusion die; 221. Head; 222. Core sleeve; 223. Extrusion head. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0022] Please refer to Figures 1-3 , the present invention provides a technical solution for a multi-stage screw structure for an exhaust injection molding machine: a multi-stage screw structure for an exhaust injection molding machine, including a screw component 1 and a barrel component 2 that mates with the screw component 1. The screw component 1 includes an integrally connected drive shaft section 11, melting stroke section 12, plasticizing section 13, kneading section 14, exhaust section 15, and nozzle head 16. The drive shaft section 11, melting stroke section 12, plasticizing section 13, kneading section 14, exhaust section 15, and nozzle head 16 are arranged in sequence along the screw conveying direction of the screw component 1. The plasticizing section 13, kneading section 14, and exhaust section 15 are all in the form of spiral rods with the screw component 1 as the axis. By sequentially setting the plasticizing section 13, kneading section 14, and exhaust section 15 as spiral rods with different pitches, a multi-stage screw structure can be formed. On the one hand, it plays a spiral propulsion role in different directions, improving the comprehensiveness of the spiral propulsion and mixing of the injection material, and at the same time making the injection material fully turn and stir. On the other hand, it plays a spiral propulsion role under different thrusts, making the injection material gradually more tightly and compactly extruded and pushed, and dynamically extruding and discharging the air inside it.

[0023] The screw auger of the plasticizing section 13 is arranged horizontally along the shaft direction of the screw component 1, and the screw auger of the mixing section 14 is arranged vertically along the shaft direction of the screw component 1. By arranging the screw auger of the plasticizing section 13 and the screw auger of the mixing section 14 in a vertical direction, a screw propulsion effect in different directions can be exerted on the injection molding material, making the mixing of the injection molding material more dynamic and comprehensive.

[0024] The pitch of the exhaust section 15 is smaller than that of the plasticizing section 13. By setting the exhaust section 15 and the plasticizing section 13 as screw rods with different pitches, which replaces the traditional screw structure of the same screw style, a screw thrust effect in different states can be provided for the injection molding material during transportation, making the screw feeding of the injection molding material more compacted and compact, and squeezing out the air inside it.

[0025] The glue head 16 includes a collar 161, a bushing 162, and a glue head body 163, and the collar 161, the bushing 162, and the glue head body 163 are arranged in sequence along the shaft direction of the screw component 1. The glue head body 163 includes a conical glue head 1631 and an assembly screw 1632 that is screwed and fixed to the screw component 1. Using the collar 161 and the bushing 162 as spacer ring components, and under the screwing of the threads of the assembly screw 1632, the glue head body 163 is screwed and fixed to the screw component 1, and then the entire glue head 16 is integrally assembled with the screw component 1, which has flexible disassembly and assembly performance and is convenient for subsequent regular maintenance work.

[0026] The barrel component 2 includes a barrel body 21 and an extrusion die 22 that are integrally connected, and the barrel body 21 and the extrusion die 22 respectively correspond to the screw section and the glue head section of the screw component 1. An inlet 211 opposite to the butting end of the melting rubber travel section 12 and the plasticizing section 13 is opened on one side of the barrel of the barrel body 21, and an exhaust port 212 opposite to the exhaust section 15 is opened on the other side of the barrel of the barrel body 21. By opening the inlet 211 at the port of the plasticizing section 13, the injection molding material for conveying and feeding is spirally propelled along the plasticizing section 13 and gradually extruded into shape. While the injection molding material is being spirally propelled, by opening the exhaust port 212 at a position close to the exhaust section 15, an extrusion exhaust process is carried out on the injection molding material under gradually compacted thrust to squeeze out the air in the injection molding material.

[0027] The extrusion die 22 includes a die head 221, a core sleeve 222, and an extrusion head 223. The core sleeve 222 is screwed to the discharge port of the die head 221, and the extrusion head 223 is screwed to the discharge port of the core sleeve 222. By setting the combination of the die head 221, the core sleeve 222, and the extrusion head 223 in an integrally screwed form, it has relatively flexible disassembly performance and is convenient for subsequent daily disassembly and maintenance work.

[0028] The working principle of the present utility model is as follows: When using the combination of the barrel component 2 and the screw component 1 as the screw extrusion component of an exhaust-type injection molding machine, when injecting plastic material is fed into the interior of the barrel component 2 through the feeding port 211, the screw rod components with different pitches on the screw component 1 are used to carry out the propulsion and extrusion work of the injecting plastic material under different thrusts;

[0029] Furthermore, through the spiral propulsion of the plasticizing section 13, the mixing section 14, and the exhaust section 15 on the screw component 1, a multi-stage screw structure is formed. By using the horizontal spiral propulsion of the horizontally arranged plasticizing section 13 and the longitudinal spiral propulsion of the vertically arranged mixing section 14, a spiral propulsion effect in different directions is exerted on the injecting plastic material, improving the comprehensiveness of the spiral propulsion and mixing of the injecting plastic material. At the same time, the injecting plastic material is fully turned and stirred. By setting the exhaust section 15 and the plasticizing section 13 as screw rod styles with different pitches, and using the more fine spiral propulsion effect of the exhaust section 15, a spiral thrust effect in different states can be provided for the injecting plastic material during transportation, making the injecting plastic material more compact and dense during the gradual spiral feeding, and squeezing and discharging the air inside through the exhaust port 212;

[0030] Even further, after exhausting, the injecting plastic material is extruded through the combination of the nozzle head 16 and the extrusion die 22 under the action of the spiral thrust, completing the extrusion work of the injecting plastic material. It has a higher exhaust efficiency and spiral propulsion effect, can be applied to more types of plastic injection molding products, and has better production matching performance.

[0031] The above is only the preferred implementation mode of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model. The structures, devices, and operation methods not specifically described and explained in the present utility model, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. A multi-stage screw structure for an exhaust type injection molding machine, characterized in that: It comprises a screw component (1) and a barrel component (2) matching the screw component (1); The screw component (1) comprises an integrally connected transmission shaft section (11), a melt stroke section (12), a plasticizing section (13), a mixing section (14), an exhaust section (15), and a glue head (16), and the transmission shaft section (11), the melt stroke section (12), the plasticizing section (13), the mixing section (14), the exhaust section (15), and the glue head (16) are arranged in sequence along the screw conveying direction of the screw component (1); The barrel component (2) comprises a barrel body (21) and an extrusion die (22) which are integrally connected, and the barrel body (21) and the extrusion die (22) respectively correspond to the screw section and the rubber head section of the screw component (1).

2. A multi-stage screw structure for a venting injection molding machine according to claim 1, characterized in that: The plasticizing section (13), the mixing section (14) and the exhaust section (15) are all in the form of a screw rod with the screw component (1) as the axis.

3. A multi-stage screw structure for a venting injection molding machine according to claim 2, characterized in that: The spiral auger of the plasticizing section (13) is arranged horizontally along the axial direction of the screw component (1), and the spiral auger of the mixing section (14) is arranged vertically along the axial direction of the screw component (1).

4. A multi-stage screw structure for a venting injection molding machine according to claim 2, characterized in that: The pitch of the exhaust section (15) is smaller than the pitch of the plasticizing section (13).

5. The multi-stage screw structure for a venting injection molding machine according to claim 1, characterized in that: The glue head (16) comprises a shaft ring (161), a shaft sleeve (162), and a glue head body (163), and the shaft ring (161), the shaft sleeve (162), and the glue head body (163) are arranged in sequence along the shaft direction of the screw component (1).

6. A multi-stage screw structure for a venting type injection molding machine according to claim 5, characterized in that: The rubber head body (163) comprises a conical rubber head (1631) and an assembly screw (1632) which is screwed and fixedly connected to the screw component (1).

7. The multi-stage screw structure for a venting injection molding machine according to claim 1, characterized in that: A feed port (211) is provided on one side of the barrel body (21) and is opposite to the mating ends of the melt stroke section (12) and the plasticizing section (13), and an exhaust port (212) is provided on the other side of the barrel body (21) and is opposite to the exhaust section (15).

8. The multi-stage screw structure for a venting injection molding machine according to claim 1, characterized in that: The extrusion die (22) comprises a die head (221), a core sleeve (222), and an extrusion head (223); the core sleeve (222) is screwed to the discharge port of the die head (221), and the extrusion head (223) is screwed to the discharge port of the core sleeve (222).

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