Hot runner mold convenient to clean

Abstract

The utility model relates to the technical field of hot runners, in particular to a hot runner mold convenient to clean, which comprises a hot runner pipe, a blanking pipe, an electromagnetic valve nozzle and a cleaning mechanism, the blanking pipe is arranged at the top of the hot runner pipe, the electromagnetic valve nozzle is arranged at the bottom of the hot runner pipe, and the cleaning mechanism is arranged in the hot runner pipe. The cleaning mechanism comprises a supporting plate, an air cylinder, a connecting plate, a connecting rod, a cleaning brush and four cleaning plates. The hot runner has the beneficial effects that residual plastic materials, impurities and sediments on the inner wall of the hot runner are effectively removed by cleaning the inner wall of the hot runner through the cleaning mechanism, the cleanness and smoothness of the inner wall are ensured, the fluidity of plastics is favorably kept, the defects of products are avoided, and the runner is kept smooth; and residual plastic or impurities can be left on the cleaning brush, and the cleaning brush is cleaned through the cleaning plate, so that the residues can be thoroughly removed, and the residues are prevented from polluting the inner wall of the hot runner again.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runners, in particular to a hot runner mold that is easy to clean. Background Art

[0002] Hot runner molds are used in plastic injection molding process. During the injection molding process, a hot runner is formed between the nozzle and the mold cavity through a heating system to maintain the molten state of the plastic material and control the flow of the plastic, thereby producing high-quality and low-defect plastic products. Hot runner molds can improve the quality and production efficiency of injection molded products and are widely used in the production of plastic products.

[0003] After searching, a Chinese patent discloses a hot runner injection mold (authorization announcement number CN215242561U) that is convenient for flow channel cleaning, including a first assembly block and a thermal insulation layer, a mounting hole is provided on the surface of the first assembly block, and an isolation plate is provided on the upper surface of the first assembly block, a servo motor is installed inside the isolation plate, and a screw rod is connected below the servo motor, a second assembly block is provided below the first assembly block, and an extrusion head is provided at the lower end of the second assembly block, a flow channel body is provided in the middle position of the first assembly block, and a heating plate is provided on the surface of the first assembly block, and the thermal insulation layer is provided on the surface of the heating plate. The surface is provided with a limiting groove at the upper end of the heating plate, a limiting block is provided on the left side of the limiting groove, and a first spring is connected to the surface of the limiting block. The above patented technology can heat the first assembly block and the second assembly block by providing a heating plate and a heat preservation layer on the surface of the first assembly block, so that the plastic in the flow channel body provided inside the first assembly block is kept in a molten state, and the plastic inside the flow channel is kept in a flowing state. Since the first assembly block and the second assembly block are threadedly connected, the first assembly block and the second assembly block can be quickly disassembled to facilitate cleaning of the flow channel body, thereby achieving the effect of convenient and rapid cleaning of the flow channel.

[0004] However, in the actual application of this patented technology, the heated plastic products will adhere to the inner wall of the hot runner. The above-mentioned device cannot clean the inner wall of the hot runner during the hot runner cleaning process, which will cause residual plastic material or impurities to accumulate inside, affecting the uniformity of plastic flow, increasing the flaws and defects of the products, such as bubbles, marks or color changes, etc., and reducing the quality of the products. Utility Model Content

[0005] In view of the problem in the prior art that the inner wall of the hot runner cannot be cleaned, which may cause residual plastic material or impurities to accumulate inside, the main purpose of the utility model is to provide a hot runner mold that is easy to clean.

[0006] The technical solution of the utility model is as follows: a hot runner mold that is easy to clean, comprising a hot runner tube, a feed tube, a solenoid valve nozzle and a cleaning mechanism, wherein the feed tube is arranged at the top of the hot runner tube, the solenoid valve nozzle is arranged at the bottom of the hot runner tube, the cleaning mechanism is arranged inside the hot runner tube, the cleaning mechanism comprises a support plate, a cylinder, a connecting plate, a connecting rod, a cleaning brush and four cleaning plates, the cylinder is fixedly connected to the top of the support plate, the connecting plate is fixedly connected to the output end of the cylinder, the connecting rod is rotatably connected to one end of the connecting plate away from the bottom of the cylinder, the cleaning brush is fixedly connected to the bottom of the connecting rod, the four cleaning plates are symmetrically fixedly connected to the bottom of the support plate, and the cleaning brush is used in conjunction with the cleaning plate.

[0007] Through the above technical scheme, the start and stop of the cylinder is controlled by an external control device, and the support plate is aligned with the top of the hot runner tube, so that the connecting rod drives the cleaning brush to enter the interior of the hot runner tube. The diameter of the cleaning brush is the same as the inner wall diameter of the hot runner tube. The cylinder drives the lifting of the connecting rod to achieve Z-axial cleaning of the inner wall of the hot runner tube. After the hot runner tube is cleaned, the cylinder drives the cleaning brush to the bottom of the support plate through the connecting rod, and the plastic and impurities attached to the outside of the cleaning brush are cleaned through the cleaning plate.

[0008] As a preferred embodiment, a sleeve is rotatably connected to the top of the support plate and located outside the connecting rod, a second gear is fixedly connected to the top of the sleeve, a flat key is symmetrically fixedly connected to the outside of the connecting rod, a key slot is provided inside the second gear, and the flat keys are slidably connected to the key slot.

[0009] Through the above technical solution, the coordinated use of the flat key and the keyway can enable the cylinder to drive the connecting rod to rise and fall while the motor can drive the connecting rod to rotate, thereby achieving simultaneous X-axis and Z-axis movement of the connecting rod.

[0010] As a preferred embodiment, a motor is fixedly connected to the top of the support plate and one end away from the cylinder, and the output shaft of the motor is fixedly connected to a first gear, and the first gear is meshingly connected to a second gear.

[0011] Through the above technical solution, the central motor is controlled by an external control device, and the first gear is meshed with the second gear to drive the connecting rod to rotate.

[0012] As a preferred implementation, a threaded tube is fixedly connected to the bottom of the hot runner tube, a threaded groove is formed on the top of the solenoid valve nozzle, and the threaded tube is threadedly connected to the threaded groove.

[0013] Through the above technical solution, precise control and adjustment of the plastic melt can be achieved through the solenoid valve nozzle, and the solenoid valve nozzle can accurately control the flow and filling process of the plastic melt to meet the high-precision requirements of the product on size, shape and material distribution.

[0014] As a preferred implementation, a heating plate with an annular structure is provided inside the hot runner tube.

[0015] Through the above technical solution, the heating plate can provide uniform heating and cooling effects, ensuring that the plastic material has stable temperature and fluidity in the hot runner.

[0016] As a preferred implementation, the outer side of the hot runner tube is provided with an annular insulation layer.

[0017] Through the above technical solution, the insulation layer on the outer side of the hot runner tube can effectively reduce heat loss, reduce the heat dissipation speed of the hot runner, and thus reduce energy consumption.

[0018] As a preferred embodiment, an alignment plate is fixedly connected to the top of the hot runner tube, and the alignment plate is connected to the feed pipe and the cleaning mechanism through screws.

[0019] Through the above technical solution, the alignment plate is disassembled through screws, the feed pipe and the cleaning mechanism, which makes disassembly and assembly more convenient and reduces the work intensity of the staff.

[0020] Compared with the prior art, the advantages and positive effects of the utility model are:

[0021] In the utility model:

[0022] 1. In the above device, the cleaning mechanism cleans the inner wall of the hot runner, effectively removing the residual plastic material, impurities and sediments on the inner wall of the hot runner, ensuring the cleanliness and smoothness of the inner wall, helping to maintain the fluidity of the plastic, avoiding the occurrence of product defects, improving product quality, reducing the adhesion of plastic, reducing the occurrence of blockage, and keeping the flow channel unobstructed;

[0023] 2. In the above device, when the cleaning mechanism cleans the inner wall of the hot runner, there will be residual plastic or impurities left on the cleaning brush. The cleaning brush can be cleaned by the cleaning plate to completely remove the residue and prevent the residue from contaminating the inner wall of the hot runner again. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a first-perspective stereogram of the present invention;

[0025] Figure 2 It is a second perspective stereogram of the utility model;

[0026] Figure 3This is a schematic diagram of the cleaning mechanism structure of the utility model;

[0027] Figure 4 This is an explosion diagram of the cleaning mechanism of the utility model;

[0028] Figure 5 This is a front cross-sectional view of the utility model;

[0029] Figure 6 It is a front sectional view of the cleaning mechanism of the utility model.

[0030] Legend: 1. Hot runner tube; 2. Feeding tube; 3. Solenoid valve nozzle; 4. Support plate; 5. Cylinder; 6. Connecting plate; 7. Connecting rod; 8. Flat key; 9. Motor; 10. First gear; 11. Second gear; 12. Keyway; 13. Cleaning brush; 14. Cleaning plate; 15. Sleeve; 16. Threaded tube; 17. Threaded groove; 18. Heating plate; 19. Insulation layer; 20. Alignment plate. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] Example

[0034] like Figure 1-Figure 6As shown, the utility model provides a technical solution: a hot runner mold that is easy to clean, comprising a hot runner tube 1, a feed tube 2, a solenoid valve nozzle 3 and a cleaning mechanism, the feed tube 2 is arranged at the top of the hot runner tube 1, the solenoid valve nozzle 3 is arranged at the bottom of the hot runner tube 1, the cleaning mechanism is arranged inside the hot runner tube 1, the cleaning mechanism comprises a support plate 4, a cylinder 5, a connecting plate 6, a connecting rod 7, a cleaning brush 13 and four cleaning plates 14, the cylinder 5 is fixedly connected to the top of the support plate 4, the connecting plate 6 is fixedly connected to the output end of the cylinder 5, the connecting rod 7 is rotatably connected to the end of the connecting plate 6 away from the bottom of the cylinder 5, the cleaning brush 13 is fixedly connected to the bottom of the connecting rod 7, and the four cleaning plates 14 are fixedly connected to the top of the support plate 4, the connecting plate 6 is fixedly connected to the output end of the cylinder 5, the connecting rod 7 is rotatably connected to the end of the connecting plate 6 away from the bottom of the cylinder 5, the cleaning brush 13 is fixedly connected to the bottom of the connecting rod 7, and the four cleaning plates 1 4 are symmetrically fixedly connected to the bottom of the support plate 4, and the cleaning brush 13 is used in conjunction with the cleaning plate 14. In the above device, the start and stop of the cylinder 5 is controlled by an external control device, and the support plate 4 is aligned with the top of the hot runner tube 1, so that the connecting rod 7 drives the cleaning brush 13 to enter the interior of the hot runner tube 1. The diameter of the cleaning brush 13 is the same as the diameter of the inner wall of the hot runner tube 1. The cylinder 5 drives the connecting rod 7 to rise and fall, so as to realize the Z-axial cleaning of the inner wall of the hot runner tube 1. After the hot runner tube 1 is cleaned, the cylinder 5 drives the cleaning brush 13 to rise to the bottom of the support plate 4 through the connecting rod 7, and the plastic and impurities attached to the outside of the cleaning brush 13 are cleaned through the cleaning plate 14.

[0035] Among them, a sleeve 15 is rotatably connected to the top of the support plate 4 and located outside the connecting rod 7, and a second gear 11 is fixedly connected to the top of the sleeve 15. A flat key 8 is symmetrically fixedly connected to the outside of the connecting rod 7. A key slot 12 is provided inside the second gear 11, and the flat keys 8 are slidingly connected to the key slot 12. The coordinated use of the flat key 8 and the key slot 12 in the above device can enable the cylinder 5 to drive the connecting rod 7 to rise and fall while the motor 9 can drive the connecting rod 7 to rotate, thereby achieving simultaneous X-axis and Z-axis movements of the connecting rod 7.

[0036] Among them, a motor 9 is fixedly connected to the top of the support plate 4 and one end away from the cylinder 5, and the output shaft of the motor 9 is fixedly connected to the first gear 10, and the first gear 10 is meshed with the second gear 11. In the above device, the motor 9 is controlled by an external control device, and the first gear 10 is meshed with the second gear 11 to drive the connecting rod 7 to rotate.

[0037] Among them, a threaded tube 16 is fixedly connected to the bottom of the hot runner tube 1, and a threaded groove 17 is opened on the top of the solenoid valve nozzle 3. The threaded tube 16 is threadedly connected to the threaded groove 17. In the above device, the solenoid valve nozzle 3 can realize precise control and adjustment of the plastic melt. The solenoid valve nozzle 3 can accurately control the flow and filling process of the plastic melt to meet the high-precision requirements of the product on size, shape and material distribution.

[0038] Among them, a heating plate 18 with an annular structure is arranged inside the hot runner tube 1. The heating plate 18 in the above device can provide uniform heating and cooling effects to ensure that the plastic material has a stable temperature and fluidity in the hot runner.

[0039] Among them, the outer side of the hot runner tube 1 is provided with an annular structure insulation layer 19. The insulation layer 19 on the outer side of the hot runner tube 1 in the above device can effectively reduce heat energy loss, reduce the heat dissipation speed of the hot runner, and thus reduce energy consumption.

[0040] Among them, the top of the hot runner tube 1 is fixedly connected with an alignment plate 20, and the alignment plate 20 is connected to the discharge pipe 2 and the cleaning mechanism by screws. In the above device, the alignment plate 20 is disassembled from the discharge pipe 2 and the cleaning mechanism by screws, which can make disassembly and assembly more convenient and reduce the workload of the staff.

[0041] Working principle:

[0042] like Figure 1-Figure 6 As shown, the alignment plate 20 in the above device is disassembled with the feed tube 2 and the cleaning mechanism by screws, which makes disassembly and assembly more convenient and reduces the work intensity of the staff. The solenoid valve nozzle 3 can realize precise control and adjustment of the plastic melt. The solenoid valve nozzle 3 can accurately control the flow and filling process of the plastic melt to meet the high-precision requirements of the product on size, shape and material distribution. The start and stop of the cylinder 5 is controlled by an external control device, and the support plate 4 is aligned with the top of the hot runner tube 1, so that the connecting rod 7 drives the cleaning brush 13 to enter the interior of the hot runner tube 1. The diameter of the cleaning brush 13 is the same as the inner wall diameter of the hot runner tube 1. The cylinder 5 drives the lifting of the connecting rod 7 to realize the hot runner tube. 1 is cleaned in the Z-axis direction of the inner wall of the hot runner tube 1. After the hot runner tube 1 is cleaned, the cylinder 5 drives the cleaning brush 13 to rise to the bottom of the support plate 4 through the connecting rod 7, and the plastic and impurities attached to the outside of the cleaning brush 13 are cleaned through the cleaning plate 14. The flat key 8 and the keyway 12 can be used in conjunction with the cylinder 5 to drive the connecting rod 7 to rise and fall while the motor 9 can drive the connecting rod 7 to rotate, so that the X-axis and Z-axis directions of the connecting rod 7 are simultaneously cleaned to remove the residual plastic material, impurities and sediments on the inner wall of the hot runner tube 1, ensure the cleanliness and smoothness of the inner wall, help maintain the fluidity of the plastic, avoid the generation of product defects, improve the quality of the product, and greatly improve the operation quality and use efficiency compared with the traditional device.

[0043] Finally, it should be noted that the above-described embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A hot runner mold that is easy to clean, comprising a hot runner pipe (1), a feed pipe (2), a solenoid valve nozzle (3) and a cleaning mechanism, characterized in that: The feed pipe (2) is arranged at the top of the hot runner pipe (1), the solenoid valve nozzle (3) is arranged at the bottom of the hot runner pipe (1), and the cleaning mechanism is arranged inside the hot runner pipe (1), and the cleaning mechanism comprises a support plate (4), a cylinder (5), a connecting plate (6), a connecting rod (7), a cleaning brush (13) and four cleaning plates (14); The cylinder (5) is fixedly connected to the top of the support plate (4), the connecting plate (6) is fixedly connected to the output end of the cylinder (5), the connecting rod (7) is rotatably connected to the end of the connecting plate (6) away from the bottom of the cylinder (5), the cleaning brush (13) is fixedly connected to the bottom of the connecting rod (7), and the four cleaning plates (14) are symmetrically fixedly connected to the bottom of the support plate (4), and the cleaning brush (13) is used in conjunction with the cleaning plates (14).

2. The hot runner mold that is easy to clean according to claim 1, characterized in that: A sleeve (15) is rotatably connected to the top of the support plate (4) and located outside the connecting rod (7); a second gear (11) is fixedly connected to the top of the sleeve (15); a flat key (8) is symmetrically fixedly connected to the outside of the connecting rod (7); a key slot (12) is provided inside the second gear (11); and the flat keys (8) are slidably connected to the key slot (12).

3. The hot runner mold that is easy to clean according to claim 2, characterized in that: A motor (9) is fixedly connected to the top of the support plate (4) and at one end away from the cylinder (5); an output shaft of the motor (9) is fixedly connected to a first gear (10); and the first gear (10) is meshingly connected to a second gear (11).

4. The hot runner mold that is easy to clean according to claim 1, characterized in that: A threaded tube (16) is fixedly connected to the bottom of the hot runner tube (1), a threaded groove (17) is provided on the top of the solenoid valve nozzle (3), and the threaded tube (16) is threadedly connected to the threaded groove (17).

5. The hot runner mold that is easy to clean according to claim 1, characterized in that: A heating plate (18) with an annular structure is arranged inside the hot runner tube (1).

6. The hot runner mold that is easy to clean according to claim 1, characterized in that: The outer side of the hot runner tube (1) is provided with a heat-insulating layer (19) of an annular structure.

7. The hot runner mold that is easy to clean according to claim 1, characterized in that: The top of the hot runner tube (1) is fixedly connected with an alignment plate (20), and the alignment plate (20) is connected to the feed tube (2) and the cleaning mechanism via screws.

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