Dual injection mouth injection molding machine

Abstract

The application discloses a double-injection-port injection molding machine, and relates to the technical field of injection molding equipment, which comprises a material injection mechanism and an injection mechanism. The material injection mechanism comprises a material conveying cylinder, first and second injection ports arranged on the upper portions of the left and right ends of the material conveying cylinder, a double-way spiral auger rotatably connected in the material conveying cylinder and driven by a first driving assembly, a material receiving hopper connected to the lower portion of the middle of the material conveying cylinder, and a material stirring assembly driven by a second driving assembly in the material receiving hopper. The injection mechanism comprises a supporting platform, a melting cylinder arranged on the supporting platform, a single-way spiral auger driven by a third driving assembly in the melting cylinder, a discharging port arranged on one side of the melting cylinder, a lower material receiving hopper communicated with the other side of the melting cylinder, and the lower material receiving hopper connected with the material receiving hopper. The application realizes stable double-way material feeding through the double-way spiral auger, prevents material blockage through the material stirring assembly, and improves the melting material conveying efficiency through the variable-diameter design of the single-way spiral auger, so that the problems of uneven feeding, easy blockage and low conveying efficiency of the existing equipment are solved, and the production efficiency and product quality stability are improved.

Description

Technical Field

[0001] This application relates to the field of injection molding equipment technology, and in particular to a dual-injection-port injection molding machine. Background Technology

[0002] Injection molding machines are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. They are widely used in the plastic product processing industry. With the rapid development of the manufacturing industry, the requirements for injection molding production efficiency and product quality are increasing. Traditional single-injection-port injection molding machines have gradually revealed problems such as low production efficiency and uneven material distribution.

[0003] To improve production efficiency, some companies have attempted to develop multi-injection-port injection molding machines. However, existing dual-injection-port injection molding machines generally suffer from the following defects: First, the material conveying stability of the injection mechanism is poor. When feeding material in both directions, material accumulation or uneven distribution is prone to occur, resulting in large fluctuations in the feed rate of the two injection ports and affecting the consistency of the final product. Second, material blockage is prone to occur at the connection between the receiving hopper and the conveying cylinder, especially when processing plastic raw materials with uneven particle size or a certain degree of viscosity. The blockage problem is more prominent, requiring frequent shutdowns for cleaning, which seriously affects the continuity of production. Third, the material conveying thrust of the melting mechanism is insufficient. Molten plastic raw materials are prone to stagnation during the conveying process, which not only reduces production efficiency but may also lead to performance degradation due to prolonged heating of the raw materials, affecting product quality. Utility Model Content

[0004] This utility model addresses the aforementioned problems in the existing technology by providing a dual-injection-port injection molding machine.

[0005] The objective of this utility model is mainly achieved through the following solution: A dual-injection-gate injection molding machine, comprising an injection mechanism and an injection molding mechanism; The injection mechanism includes a feeding cylinder, which is hollow inside and closed at both ends. The upper parts of the left and right ends of the feeding cylinder are respectively provided with a first injection port and a second injection port. A bidirectional spiral auger is rotatably connected inside the feeding cylinder and is driven to rotate by a first drive component. A receiving hopper is connected to the lower middle part of the feeding cylinder. A feeding component is rotatably connected inside the receiving hopper and is driven to rotate by a second drive component. The injection molding mechanism includes a support platform on which a melting cylinder is installed. The melting cylinder is hollow inside and has a discharge port on one side. A one-way spiral auger is rotatably connected inside the melting cylinder and is driven to rotate by a third drive component. A feeding hopper is connected to the side of the melting cylinder away from the discharge port. The top of the feeding hopper is connected to the bottom of the receiving hopper.

[0006] Preferably, the feeding assembly includes a feeding shaft and multiple clamping plates mounted on the side wall of the feeding shaft, and the multiple clamping plates are evenly arranged in multiple sets around the axis of the feeding shaft.

[0007] Preferably, the clamping plate adopts a "V" shaped structure, and an insertion groove is formed between two adjacent clamping plates, and a material feeding plate is detachably and fixedly connected in the insertion groove.

[0008] Preferably, the middle part of the feeding cylinder has a feeding cavity that is circumferentially matched with the feeding assembly.

[0009] Preferably, the outer wall of the melting cylinder near the discharge port is provided with multiple sets of heating components.

[0010] Preferably, the upper surface of the support platform is provided with a protective plate covering the outside of the heating component.

[0011] Preferably, the diameter of the unidirectional spiral auger gradually increases along the material conveying direction.

[0012] In summary, compared with the prior art, the present invention has the following beneficial technical effects: (1) By setting a bidirectional spiral auger inside the feed cylinder and cooperating with symmetrically distributed spiral blades, this utility model can stably transport materials from the left and right injection ports to the middle of the feed cylinder, effectively solving the problem of uneven material distribution in traditional double injection port injection molding machines, ensuring that the feed amount of the two injection ports is consistent, improving the stability of product quality, and at the same time, the double injection port design greatly improves production efficiency. (2) The present invention provides a material feeding assembly driven by the second drive assembly inside the receiving hopper. The multiple feeding plates in the feeding assembly can fully stir and guide the material entering the receiving hopper, break up the material agglomeration, and prevent the material from accumulating and blocking at the connection between the receiving hopper and the conveying cylinder. In addition, the feeding plates adopt a detachable structure, which is convenient to replace according to the material characteristics or wear degree, further improving the adaptability of the anti-blocking performance, reducing downtime for cleaning, and ensuring the continuity of production. (3) The unidirectional spiral auger inside the melting cylinder of this utility model adopts a variable diameter design, with the diameter gradually increasing along the material conveying direction, which can significantly enhance the pushing force on the molten material and prevent the molten material from stagnating in the melting cylinder; at the same time, the multiple sets of heating components set on the outside of the melting cylinder ensure that the material can be fully melted. The protective plate not only improves the safety of operation, but also reduces heat loss, realizes the efficient use of energy, and further improves the overall production efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2This is a schematic diagram of the material injection mechanism in this utility model; Figure 3 This is a schematic diagram of the bidirectional spiral auger in this utility model; Figure 4 This is a schematic diagram of the material feeding assembly in this utility model; Figure 5 This is a schematic diagram of the injection molding mechanism in this utility model; Figure 6 This is a schematic diagram of the structure of the melting cylinder and the unidirectional spiral auger in this utility model.

[0014] Reference numerals: 1-Injection mechanism; 2-Injection molding mechanism; 3-Feeding cylinder; 4-First injection port; 5-Second injection port; 6-Bidirectional spiral auger; 7-First drive assembly; 8-Receiving hopper; 9-Second drive assembly; 10-Support platform; 11-Melting cylinder; 12-Discharge port; 13-Unidirectional spiral auger; 14-Third drive assembly; 15-Discharge hopper; 16-Feeding shaft; 17-Clamping plate; 18-Intercepting groove; 19-Feeding plate; 20-Feeding chamber; 21-Heating assembly; 22-Protective plate. Detailed Implementation

[0015] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.

[0016] like Figure 1 As shown, this utility model discloses a technical solution: a dual-injection-gate injection molding machine, including an injection mechanism 1 and an injection molding mechanism 2, with the specific structure as follows: like Figure 2 As shown, the injection mechanism 1 includes a material conveying cylinder 3, which is hollow inside and has closed ends on both sides. A first injection port 4 and a second injection port 5 for receiving material are respectively opened on the upper part of the left and right ends of the material conveying cylinder 3. A bidirectional spiral auger 6 is rotatably connected inside the material conveying cylinder 3, such as... Figure 3As shown, the spiral blades of the bidirectional spiral auger 6 are symmetrically distributed, which can transport materials from both ends of the conveying cylinder 3 to the middle when rotating. The bidirectional spiral auger 6 is driven to rotate by the first drive assembly 7. The first drive assembly 7 can adopt a combination structure of motor and reducer to ensure stable power output. In this embodiment, the first drive assembly 7 is a three-phase asynchronous motor of model Y132M-4 with a power of 7.5kW, which is matched with a reducer with a reduction ratio of 1:20 to ensure that the speed of the bidirectional spiral auger 6 is stable at 30r / min. The lower middle part of the conveying cylinder 3 is connected to a funnel-shaped receiving hopper 8 for receiving raw materials. The connection between the receiving hopper 3 and the conveying cylinder 3 is a flange connection, which is easy to disassemble. A material feeding component is rotatably connected inside the receiving hopper 8. This material feeding component can stir and guide the material entering the receiving hopper 8 to prevent the material from clumping and blocking. The material feeding component is driven to rotate by the second drive component 9. The second drive component 9 can also be a drive motor with an appropriate power. In this embodiment, the second drive component 9 is a Y90S-4 motor with a power of 1.1kW, which drives the material feeding shaft 16 to rotate at a speed of 60r / min.

[0017] like Figure 5 , 6 As shown, the injection molding mechanism 2 includes a support platform 10, which provides stable support for the entire injection molding mechanism. A melting cylinder 11 for melting materials is mounted on its surface. The melting cylinder 11 is hollow inside, with a discharge port 12 on one side for discharging the molten material. A one-way auger 13 is rotatably connected inside the melting cylinder 11. This one-way auger 13 pushes the molten material towards the discharge port 12. The one-way auger 13 is driven to rotate by a third drive assembly 14. The third drive assembly 14 selects appropriate power parameters according to the material conveying requirements. In this embodiment, the third drive assembly 14 uses a Y112M-4 motor with a power of 4kW, and a reducer with a reduction ratio of 1:15, maintaining the speed of the one-way auger 13 at 40r / min. A discharge hopper 15 is connected to the side of the melting cylinder 11 away from the discharge port 12. The top of the discharge hopper 15 is connected to the bottom of the receiving hopper 8, forming a material conveying channel from the injection mechanism to the injection molding mechanism.

[0018] Specifically, such as Figure 4As shown, the material feeding assembly includes a feeding shaft 16 and multiple clamping plates 17 installed on the side wall of the feeding shaft 16. Multiple sets of clamping plates 17 are evenly arranged circumferentially along the axis of the feeding shaft 16, ensuring that the mixing and guiding range of the material covers the entire interior of the receiving hopper 8. Furthermore, the clamping plates 17 adopt a "V"-shaped structure, with an insertion groove 18 formed between adjacent clamping plates 17. A feeding plate 19 is detachably and fixedly connected within the insertion groove 18. This detachable structure facilitates the replacement of feeding plates 19 of different shapes or materials according to the material characteristics, improving the adaptability of the equipment and also facilitating subsequent cleaning and maintenance of the feeding plates 19.

[0019] To accommodate the rotation of the feeding assembly, a feeding cavity 20 is formed in the middle of the feeding cylinder 3, which is in circumferentially aligned with the rotating part of the feeding assembly. The inner diameter of the feeding cavity 20 is slightly larger than the rotating diameter of the feeding assembly, which ensures that the feeding assembly can rotate freely and prevents material from accumulating in the gaps.

[0020] To ensure that the material inside the melting cylinder 11 is fully melted, multiple sets of heating components 21 are provided on the outer wall of the melting cylinder 11 near the discharge port 12. The heating components 21 can be electric heating jackets or heating wire structures. Temperature control of the melting cylinder 11 is achieved through the evenly distributed heating components. In this embodiment, electric heating jackets are used, with a total of 2 sets, each with a power of 2kW, evenly fitted on the outer wall of the melting cylinder 11 near the discharge port 12. Precise temperature control is achieved through a temperature controller, with a temperature control range of 150-300℃. At the same time, a protective plate 22 is provided on the upper surface of the support platform 10, covering the outside of the heating components 21. The protective plate 22 is made of a high-temperature resistant and heat-insulating material, which can prevent operators from being accidentally burned by touching it, and also reduce heat loss and improve energy utilization efficiency.

[0021] To enhance the conveying thrust of the unidirectional spiral auger 13 on the molten material and prevent material stagnation, the diameter of the unidirectional spiral auger 13 gradually increases along the material conveying direction. This variable diameter structure can gradually increase the extrusion thrust on the material during the conveying process, ensuring that the molten material can be smoothly discharged from the outlet 12. In this embodiment, the minimum diameter of the unidirectional spiral auger 13 is 50 mm, the maximum diameter is 100 mm, and it gradually increases along the material conveying direction, with a pitch of 120 mm.

[0022] In actual operation, the plastic raw material enters through the first injection port 4 and the second injection port 5 of the dual-injection-port injection molding machine in this embodiment. The bidirectional spiral auger 6, driven by the first drive component 7, conveys the raw material from both ends to the middle, realizing bidirectional feeding. The feeding component rotates under the drive of the second drive component 9 to stir and guide the raw material and prevent blockage. At the same time, some raw material enters the melting cylinder 11 through the discharge hopper 15. The heating component 21 heats the melting cylinder 11 to melt the raw material. The unidirectional spiral auger 13, driven by the third drive component 14, discharges the molten material from the discharge port 12 to complete the injection molding operation.

[0023] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dual-injection-gate injection molding machine, characterized in that: It includes an injection mechanism (1) and an injection molding mechanism (2); The injection mechanism (1) includes a feeding cylinder (3), which is hollow inside and closed at both ends. The upper parts of the left and right ends of the feeding cylinder (3) are respectively provided with a first injection port (4) and a second injection port (5). A bidirectional spiral auger (6) is rotatably connected inside the feeding cylinder (3), and the bidirectional spiral auger (6) is driven to rotate by a first drive assembly (7). A receiving hopper (8) is connected to the lower middle part of the feeding cylinder (3). A feeding assembly is rotatably connected inside the receiving hopper (8), and the feeding assembly is driven to rotate by a second drive assembly (9). The injection molding mechanism (2) includes a support platform (10), on which a melting cylinder (11) is installed. The melting cylinder (11) is hollow inside and has a discharge port (12) on one side. A one-way spiral auger (13) is rotatably connected inside the melting cylinder (11), and the one-way spiral auger (13) is driven to rotate by a third drive assembly (14). A feeding hopper (15) is connected to the side of the melting cylinder (11) away from the discharge port (12). The top of the feeding hopper (15) is connected to the bottom of the receiving hopper (8).

2. The dual-injection-gate injection molding machine according to claim 1, characterized in that: The feeding assembly includes a feeding shaft (16) and multiple clamping plates (17) installed on the side wall of the feeding shaft (16). The multiple clamping plates (17) are evenly arranged in multiple groups around the axis of the feeding shaft (16).

3. The dual-injection-gate injection molding machine according to claim 2, characterized in that: The clamping plate (17) adopts a "V" shaped structure, and a plug-in groove (18) is formed between two adjacent clamping plates (17). A material-pulling plate (19) is detachably and fixedly connected in the plug-in groove (18).

4. The dual-injection-gate injection molding machine according to claim 3, characterized in that: The middle part of the feeding cylinder (3) has a feeding cavity (20) that is circumferentially coordinated with the feeding assembly.

5. The dual-injection-gate injection molding machine according to claim 1, characterized in that: The outer wall of the melting cylinder (11) near the outlet (12) is provided with multiple sets of heating components (21).

6. The dual-injection-gate injection molding machine according to claim 5, characterized in that: The upper surface of the support platform (10) is provided with a protective plate (22) covering the outside of the heating component (21).

7. The dual-injection-gate injection molding machine according to claim 1, characterized in that: The diameter of the unidirectional spiral auger (13) gradually increases along the material conveying direction.

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