Double-screw high-speed injection molding machine
Through the combination of twin screw design and preheating chamber stirring system, the problems of uneven fusion and slow injection speed of traditional injection molding machines when dealing with high viscosity materials and complex structural products are solved, and efficient and uniform plastic products are achieved.
Patent Information
- Application Number
- CN202422700570.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-11-06
AI Technical Summary
Traditional injection molding machines mostly use single screw designs, which have problems such as uneven fusion and slow injection speed when dealing with high viscosity materials and complex structural products.
The twin screw design is adopted, combining the preheating chamber and the stirring system, and the material melting efficiency and injection speed are improved through the combination of the twin screw extrusion and mixing rod.
It achieves uniform fusion and efficient injection of high-viscosity materials and complex structural products, improving production efficiency and product quality.
Smart Images
Figure CN223302157U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of plastic processing machinery, in particular to a twin-screw high-speed injection molding machine. Background Art
[0002] An injection molding machine is a primary molding device that uses plastic molding molds to create various shapes of plastic products from thermoplastics or thermosetting plastics. It heats the plastic material, applies high pressure to the molten plastic, and ejects it to fill the mold cavity. The plastic is then cooled and shaped to produce various plastic products.
[0003] The main functions of injection molding machines include: Production of plastic products: Injection molding machines are key equipment for the production of various plastic products, such as plastic bottles, plastic containers, and plastic toys. They produce plastic products of various shapes by injecting molten plastic into a mold, allowing it to cool and form. Improved production efficiency: Injection molding machines have the advantages of high precision, high efficiency, and high consistency, which can significantly improve the production efficiency of plastic products. At the same time, injection molding machines can also achieve automated production, reduce manual operations, and lower production costs. Strong adaptability: Injection molding machines can meet the production needs of different types and shapes of plastic products. By changing the mold, the injection molding machine can easily produce plastic products of different shapes and sizes to meet the diverse needs of the market.
[0004] However, in actual use of existing technologies, traditional injection molding machines mostly adopt a single-screw design. Although it can meet the production needs of general plastic products, when processing high-viscosity materials, products requiring high filling rates or complex structures, single-screw injection molding machines have problems of uneven fusion and slow injection speed. Utility Model Content
[0005] The purpose of the present utility model is to provide a twin-screw high-speed injection molding machine to solve the problem that traditional injection molding machines proposed in the above background technology mostly adopt a single-screw design. Although it can meet the production needs of general plastic products, when processing high-viscosity materials, products requiring high filling rates or complex structures, the injection molding machine with a single-screw design has problems of uneven fusion and slow injection speed.
[0006] In order to achieve the above-mentioned purpose, the present utility model provides the following technical solutions: comprising an injection molding machine body and a mounting platform;
[0007] A feed hopper is fixedly installed on the rear side of the upper end of the injection molding machine body, a thermoplastic cavity is opened in the middle of the injection molding machine body, the front end of the thermoplastic cavity is connected to and fixedly installed with a discharge cavity, the lower end of the discharge cavity is connected to and fixedly installed with an injection port, a support table is fixedly installed at the rear end of the mounting platform, a drive motor is fixedly installed on the upper end of the support platform, a first extrusion screw is fixedly installed on the transmission shaft part of the front end of the drive motor, a first transmission gear is fixedly installed on the outer curved surface of the rear end of the first extrusion screw, a second transmission gear is meshed and connected with the side end of the first transmission gear, a second extrusion screw is fixedly installed in the middle of the second transmission gear, and spiral extrusion blades for shearing, compressing and forward extruding plastic materials are respectively fixedly installed on the outer curved surfaces of the first extrusion screw and the second extrusion screw;
[0008] A preheating chamber is provided inside the front end of the injection molding machine body, and a water inlet and a water outlet are fixedly installed at the upper and lower ends of the preheating chamber respectively. A temperature sensor for monitoring the stable temperature inside the preheating chamber is fixedly installed through the middle of the upper end of the preheating chamber. A stirring motor is fixedly installed at the front end of the injection molding machine body, and a first synchronous wheel is fixedly installed on the front end transmission shaft of the stirring motor in turn. The outer end of the first synchronous wheel is connected to the second synchronous wheel through a synchronous belt transmission, and a stirring shaft is fixedly installed in the middle of the second synchronous wheel. A stirring rod for stirring the preheating chamber is fixedly installed on the outer curved surface of the stirring shaft.
[0009] Preferably, the injection molding machine body is fixedly mounted through the middle of the upper end of the mounting platform, and there are two mounting platforms, which are symmetrically distributed on both sides of the injection molding machine body.
[0010] Preferably, fixing holes are formed through the four corners of the bottom of the mounting platform, and the fixing holes are symmetrically distributed at the four corners of the bottom of the mounting platform.
[0011] Preferably, the feed hopper penetrates downward into the interior of the thermoplastic cavity, and an electric heating wire for heating and melting the plastic material is embedded and fixedly installed on the inner wall of the thermoplastic cavity.
[0012] Preferably, the front and rear ends of the first extrusion screw and the second extrusion screw are rotatably connected to the discharge cavity and the inner wall of the thermoplastic cavity respectively through a rotating shaft, and the spiral extrusion blades are staggered with each other.
[0013] Preferably, switch valves are respectively installed at the outer ends of the water inlet and the water outlet.
[0014] Preferably, the stirring shaft passes through the inner wall of the preheating chamber through the rotating shaft, and there are several stirring rods, which are symmetrically distributed in sequence along the outer curved surface of the stirring shaft.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] 1. When the plastic material is discharged into the thermoplastic cavity, the utility model discharges external hot water into the preheating cavity through the water inlet. When the external hot water is discharged into the preheating cavity, the preheating cavity preheats the outside of the thermoplastic cavity. The temperature inside the preheating cavity is monitored by the temperature sensor, thereby achieving twin-screw extrusion injection molding of the plastic material while improving the heating efficiency of the thermoplastic cavity through the preheating cavity.
[0017] 2. The present invention also controls the stirring motor to start. When the stirring motor is turned on, it drives the first synchronous wheel to rotate. When the first synchronous wheel rotates, it drives the second synchronous wheel to rotate through the synchronous belt transmission. When the second synchronous wheel rotates, it drives the stirring shaft to rotate. When the stirring shaft rotates, it drives the stirring rod to rotate. When the stirring rod rotates, it drives the heating water inside the preheating chamber to stir and flow. The stirring flow of the heated water further improves the preheating efficiency of the preheating chamber on the thermoplastic chamber. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the overall structure of a twin-screw high-speed injection molding machine of this utility model Figure 1 ;
[0019] Figure 2 This is a schematic diagram of the overall structure of a twin-screw high-speed injection molding machine of this utility model Figure 2 ;
[0020] Figure 3 This is a schematic diagram of the overall structure of a twin-screw high-speed injection molding machine of this utility model Figure 1 ;
[0021] Figure 4 This is a schematic diagram of the overall structure of a twin-screw high-speed injection molding machine of this utility model Figure 2 .
[0022] In the figure: 1. Injection molding machine body; 2. Mounting platform; 3. Fixing hole; 4. Feed hopper; 5. Thermoplastic cavity; 6. Discharge cavity; 7. Injection port; 8. Support platform; 9. Drive motor; 10. First extrusion screw; 11. Second transmission gear; 12. Second extrusion screw; 13. Spiral extrusion blade; 14. Preheating cavity; 15. Water inlet; 16. Water outlet; 17. Temperature sensor; 18. Stirring motor; 19. First synchronous wheel; 20. Second synchronous wheel; 21. Stirring shaft; 22. Stirring rod; 23. First transmission gear. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0024] See also Figure 1-4 The utility model provides a technical solution for a twin-screw high-speed injection molding machine: it includes an injection molding machine body 1 and a mounting platform 2, the injection molding machine body 1 is fixedly mounted on the middle of the upper end of the mounting platform 2, there are two mounting platforms 2, which are symmetrically distributed on both sides of the injection molding machine body 1, and fixing holes 3 are opened at the four corners of the bottom of the mounting platform 2, and the fixing holes 3 are symmetrically distributed at the four corners of the bottom of the mounting platform 2, so that the mounting platform 2 can be installed and fixed by matching the fixing holes 3 with the mounting bolts;
[0025] A feed hopper 4 is fixedly installed on the rear side of the upper end of the injection molding machine body 1, a thermoplastic cavity 5 is opened in the middle of the injection molding machine body 1, and the feed hopper 4 extends downward to the inside of the thermoplastic cavity 5, and an electric heating wire for heating and melting the plastic material is embedded and fixedly installed on the inner wall of the thermoplastic cavity 5. The front end of the thermoplastic cavity 5 is connected to a discharge cavity 6, and the lower end of the discharge cavity 6 is connected to an injection port 7. A support platform 8 is fixedly installed at the rear end of the mounting platform 2, and a drive motor 9 is fixedly installed on the upper end of the support platform 8. The first extrusion screw 10 is fixedly installed on the transmission shaft part of the front end of the drive motor 9. A first transmission gear 23 is fixedly mounted on the outer curved surface of the rear end of the discharge screw 10, and a second transmission gear 11 is meshedly connected to the side end of the first transmission gear 23. A second extrusion screw 12 is fixedly mounted in the middle of the second transmission gear 11, and the front and rear ends of the first extrusion screw 10 and the second extrusion screw 12 are rotatably connected to the discharge chamber 6 and the inner wall of the thermoplastic chamber 5 respectively through a rotating shaft. The outer curved surfaces of the first extrusion screw 10 and the second extrusion screw 12 are respectively fixedly mounted with spiral extrusion blades 13 for shearing, compressing and forward extruding the plastic material, and the spiral extrusion blades 13 are staggered with each other;
[0026] A preheating chamber 14 is provided inside the front end of the injection molding machine body 1. The upper and lower ends of the preheating chamber 14 are respectively connected to a water inlet 15 and a water outlet 16, and the outer ends of the water inlet 15 and the water outlet 16 are respectively installed with switch valves. A temperature sensor 17 for monitoring the stable temperature inside the preheating chamber 14 is fixedly installed through the middle of the upper end of the preheating chamber 14. A stirring motor 18 is fixedly installed at the front end of the injection molding machine body 1. A first synchronous wheel 19 is fixedly installed on the front end transmission shaft part of the stirring motor 18 in turn. The outer end of the first synchronous wheel 19 is connected to the second synchronous wheel 20 through a synchronous belt drive. A stirring shaft 21 is fixedly installed in the middle of the second synchronous wheel 20, and the stirring shaft 21 passes through the rotating shaft to the inner wall of the preheating chamber 14. A stirring rod 22 for stirring the preheating chamber 14 is fixedly installed on the outer curved surface of the stirring shaft 21, and there are several stirring rods 22, which are symmetrically distributed in sequence with the outer curved surface of the stirring shaft 21.
[0027] Working principle: When in use, the utility model discharges the plastic material required for injection molding into the thermoplastic cavity 5 through the feed hopper 4. When the plastic material is discharged into the thermoplastic cavity 5, the electric heating wire fixedly installed on the inner wall of the thermoplastic cavity 5 is controlled to be turned on. When the electric heating wire is turned on, the plastic material is heated and melted through the thermoplastic cavity 5. When the plastic material is heated and melted, the drive motor 9 is controlled to be turned on. When the drive motor 9 is turned on, the first extrusion screw 10 is driven to rotate. When the first extrusion screw 10 rotates, the first transmission gear 23 is driven to rotate. When the first transmission gear 23 rotates, it engages and drives the second transmission gear 11 to rotate. When the second transmission gear 11 rotates, it drives the second extrusion screw 12 to rotate. When the first extrusion screw 10 and the second extrusion screw 12 rotate, the heated plastic material is sheared, compressed and extruded forward by the spiral extrusion blade 13, and the extruded plastic material is injection molded through the discharge cavity 6 and the injection port 7.
[0028] When the plastic material is discharged into the thermoplastic cavity 5, external hot water is discharged into the preheating cavity 14 through the water inlet 15. When the external hot water is discharged into the preheating cavity 14, the preheating cavity 14 preheats the outside of the thermoplastic cavity 5. The temperature inside the preheating cavity 14 is monitored by the temperature sensor 17, thereby achieving twin-screw extrusion injection molding of the plastic material while improving the heating efficiency of the thermoplastic cavity 5 through the preheating cavity 14.
[0029] At the same time, by controlling to turn on the stirring motor 18, when the stirring motor 18 is turned on, it will drive the first synchronous wheel 19 to rotate. When the first synchronous wheel 19 rotates, it will drive the second synchronous wheel 20 to rotate through the synchronous belt transmission. When the second synchronous wheel 20 rotates, it will drive the stirring shaft 21 to rotate. When the stirring shaft 21 rotates, it will drive the stirring rod 22 to rotate. When the stirring rod 22 rotates, it will drive the heating water inside the preheating chamber 14 to stir and flow. The stirring flow of the heated water further improves the preheating efficiency of the preheating chamber 14 on the thermoplastic chamber 5.
[0030] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.
[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A twin-screw high-speed injection molding machine, characterized in that: It comprises an injection molding machine body (1) and a mounting platform (2); A feed hopper (4) is fixedly installed on the rear side of the upper end of the injection molding machine body (1); a thermoplastic cavity (5) is opened in the middle of the injection molding machine body (1); a discharge cavity (6) is fixedly installed at the front end of the thermoplastic cavity (5); an injection port (7) is fixedly installed at the lower end of the discharge cavity (6); a support platform (8) is fixedly installed at the rear end of the mounting platform (2); a driving motor (9) is fixedly installed at the upper end of the support platform (8); a first extrusion screw (10) is fixedly installed on the transmission shaft portion of the front end of the driving motor (9); a first transmission gear (23) is fixedly installed on the outer curved surface of the rear end of the first extrusion screw (10); a second transmission gear (11) is meshedly connected to the side end of the first transmission gear (23); a second extrusion screw (12) is fixedly installed in the middle of the second transmission gear (11); spiral extrusion blades (13) for shearing, compressing and forward extruding plastic materials are fixedly installed on the outer curved surfaces of the first extrusion screw (10) and the second extrusion screw (12); A preheating chamber (14) is provided inside the front end of the injection molding machine body (1), and a water inlet (15) and a water outlet (16) are fixedly installed at the upper and lower ends of the preheating chamber (14), respectively. A temperature sensor (17) for monitoring the internal stable temperature of the preheating chamber (14) is fixedly installed through the middle of the upper end of the preheating chamber (14), and a stirring motor (18) is fixedly installed at the front end of the injection molding machine body (1). A first synchronous wheel (19) is fixedly installed in turn on the front transmission shaft portion of the stirring motor (18), and the outer end of the first synchronous wheel (19) is connected to the second synchronous wheel (20) through a synchronous belt drive, and a stirring shaft (21) is fixedly installed in the middle of the second synchronous wheel (20), and a stirring rod (22) for stirring the preheating chamber (14) is fixedly installed on the outer curved surface of the stirring shaft (21).
2. A twin-screw high-speed injection molding machine according to claim 1, characterized in that: The injection molding machine body (1) is fixedly mounted on the middle of the upper end of the mounting platform (2). There are two mounting platforms (2), which are symmetrically distributed on both sides of the injection molding machine body (1).
3. A twin-screw high-speed injection molding machine according to claim 2, characterized in that: Fixing holes (3) are provided through the four corners of the bottom of the mounting platform (2), and the fixing holes (3) are symmetrically distributed at the four corners of the bottom of the mounting platform (2).
4. A twin-screw high-speed injection molding machine according to claim 3, characterized in that: The feed hopper (4) extends downwardly into the interior of the thermoplastic cavity (5), and an electric heating wire for heating and melting the plastic material is embedded and fixedly installed on the inner wall of the thermoplastic cavity (5).
5. A twin-screw high-speed injection molding machine according to claim 4, characterized in that: The front and rear ends of the first extrusion screw (10) and the second extrusion screw (12) are rotatably connected to the inner walls of the discharge cavity (6) and the thermoplastic cavity (5) respectively via rotating shafts, and the spiral extrusion blades (13) are staggered and distributed with each other.
6. A twin-screw high-speed injection molding machine according to claim 5, characterized in that: The outer ends of the water inlet (15) and the water outlet (16) are respectively provided with switch valves.
7. A twin-screw high-speed injection molding machine according to claim 6, characterized in that: The stirring shaft (21) passes through the inner wall of the preheating chamber (14) through the rotating shaft, and there are a plurality of stirring rods (22), which are symmetrically distributed in sequence along the outer curved surface of the stirring shaft (21).