Feed material filtering device for injection molding machine

Abstract

This utility model discloses a material filtering device for an injection molding machine, including a filter cylinder. The filter cylinder has multiple inclined filter screens arranged from top to bottom inside. The filter cylinder has a standard material outlet that connects to the bottom of the lowest filter screen, and the standard material outlet is connected to a vertically downward feeding pipe. The bottom of the filter cylinder has a suction pipe, and the top of the filter cylinder has a strip-shaped feed inlet. Ionizing air bars are installed on both sides of the feed inlet in the upper part of the inner cavity of the filter cylinder. The suction pipe is connected to an external negative pressure fan. This utility model uses ionizing air bars to generate ions to eliminate static electricity in the plastic particles, thus preventing fine particles and dust from adhering to the plastic particles and mixing into the injection molding machine. The negative pressure adsorption also removes dust and debris generated during the collision of the plastic shell, preventing fine particles from causing uneven melt flow or surface pitting.

Description

Technical Field

[0001] This utility model relates to the technical field of injection molding feeding, specifically to a material filtering device for injection molding machines. Background Technology

[0002] An injection molding machine, also known as an injection molding machine or injection molding machine, is a primary molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. To ensure good quality injection-molded products, the plastic granules entering the injection molding machine need to be filtered to remove large-sized particles and ensure good particle uniformity. However, during feeding, collisions and friction between the granules easily generate debris and dust. Existing filtration devices can only filter large particles and cannot remove small particles and debris from the plastic. This can result in fine particles causing uneven melt flow or surface pitting. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a material filtering device for injection molding machines.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] The present invention relates to a material filtering device for an injection molding machine, comprising a filter cylinder. The filter cylinder has multiple inclined filter screens arranged from top to bottom, with the mesh size decreasing sequentially from top to bottom. The filter cylinder has a standard material outlet that connects to the bottom of the lowest filter screen, and the standard material outlet is connected to a vertically downward feeding pipe. The filter cylinder also has non-standard material outlets connected to the inclined bottoms of other filter screens, and a non-standard material outlet pipe connected to the non-standard material outlet. The bottom of the filter cylinder has a suction pipe, and the top of the filter cylinder has a strip-shaped feed inlet. Ionizing air bars are installed on both sides of the feed inlet in the upper part of the inner cavity of the filter cylinder. The suction pipe is connected to an external negative pressure fan.

[0006] The bottom of the filter cylinder is mounted on a fixed base on the outer shell of the injection molding machine via a spring damping seat; the filter cylinder is equipped with a vibration motor.

[0007] As a preferred embodiment of this utility model, the ion wind bar is fixed in the inner cavity of the filter cylinder by a shock-absorbing mechanism.

[0008] As a preferred embodiment of this utility model, the shock absorption mechanism includes a pair of positioning seats disposed on the inner wall of the filter cylinder. Each positioning seat is provided with a vertically arranged through groove, and an installation seat is installed in the through groove. A rubber shock absorption layer is provided between the connection between the installation seat and the through groove. The top of the through groove is open, and a top block for closing the opening is installed on the top of the through groove. Shock absorption springs are provided between the installation seat, the bottom side of the through groove, and the top block. The two ends of the ion wind bar are fixed to the installation seats.

[0009] As a preferred embodiment of this utility model, the bottom side of the through groove and the side of the top block that contacts the shock-absorbing spring are both provided with shock-absorbing pads.

[0010] As a preferred embodiment of this utility model, a storage cylinder is installed on the top of the filter cylinder, and the inlet is located at the bottom of the storage cylinder. An air inlet communicating with the inner cavity of the filter cylinder is provided on the side wall of the storage cylinder.

[0011] As a preferred embodiment of this utility model, the bottom of the storage cylinder is provided with a docking block, and the port of the filter cylinder is provided with a positioning block, and the docking block and the positioning block are fixed together by bolts.

[0012] The beneficial effects of this utility model are:

[0013] 1. The feeding material filtering device of this injection molding machine first filters the plastic granules through a multi-stage filter screen. This filters out non-standard plastic granules, allowing only compliant granules to be fed into the injection molding machine. This avoids the possibility of uneven melt flow or surface pitting caused by small particles, while also preventing "clouding" or color differences that may result from delayed melting of large particles, thus ensuring consistent specifications and high-quality injection molded parts. Ions are generated by an ion bar to electrostatically eliminate static electricity from the plastic granules, preventing small particles and dust from adhering to the plastic granules and entering the injection molding machine. Furthermore, negative pressure adsorption removes dust and debris generated during the collision of the plastic shell, preventing these particles from entering the injection molding machine and thus avoiding the possibility of uneven melt flow or surface pitting caused by small particles.

[0014] 2. In the feeding material filtering device of this injection molding machine, the ion air bar is fixed in the inner cavity of the filter cylinder by a specific shock absorption mechanism. This avoids damage to the internal electronic components of the ion air bar caused by vibration. The double spring shock absorption mechanism has a good shock absorption effect, and a rubber shock absorption layer is provided between the connection between the mounting base and the through groove to avoid rigid contact. This has a good shock absorption effect on the ion air bar and prevents vibration of the motor from damaging the ion air bar.

[0015] 3. The material filtering device of this injection molding machine has a storage cylinder installed at the top of the filter cylinder, a docking block at the bottom of the storage cylinder, and a positioning block at the port of the filter cylinder. The docking block and the positioning block are fixed together by bolts. This buffers the material and seals the top of the filter cylinder, allowing gas to enter through the air inlet. The gas carries away the ions generated by the ion bar and ensures full contact with the granular material for electrostatic elimination. This prevents fine particles and dust from adhering to the plastic granules and entering the injection molding machine. Furthermore, the storage cylinder can be disassembled for easy inspection of the ion bar. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the feeding material filtering device of the injection molding machine of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the filter cylinder of the feeding material filtering device for the injection molding machine of this utility model;

[0019] Figure 3 This is a schematic diagram of the shock absorption mechanism of the feeding material filtering device of the injection molding machine of this utility model;

[0020] Figure 4 This is a schematic diagram of the mounting base for the feeding material filtering device of the injection molding machine of this utility model;

[0021] Figure 5 This is a schematic diagram of the installation of the ion air bar in the feeding material filtering device of the injection molding machine of this utility model.

[0022] In the diagram: 1. Filter cylinder; 2. Filter screen; 3. Standard material outlet; 4. Feeding pipe; 5. Non-standard material outlet; 6. Non-standard material outlet pipe; 7. Suction pipe; 8. Feed inlet; 9. Ionizing air bar; 10. External negative pressure fan; 11. Fixed base; 12. Vibration damping mechanism; 13. Positioning base; 14. Through groove; 15. Mounting base; 16. Rubber damping layer; 17. Top block; 18. Damping spring; 19. Vibration motor; 20. Storage cylinder; 21. Connecting block; 22. Positioning block; 23. Air inlet. Detailed Implementation

[0023] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] Example: Figure 1-5 As shown, the feeding material filtering device of the injection molding machine of this utility model includes a filter cylinder 1. The filter cylinder 1 has multiple inclined filter screens 2 arranged from top to bottom, and the mesh size of the filter screens 2 decreases from top to bottom. The filter cylinder 1 has a standard material outlet 3 that connects to the bottom of the lowest filter screen 2, and the standard material outlet 3 is connected to a vertically downward feeding pipe 4. The filter cylinder 1 also has non-standard material outlets 5 that connect to the inclined bottoms of other filter screens 2, and the filter cylinder 1 has a non-standard material outlet pipe 6 connected to the non-standard material outlets 5. The bottom of the filter cylinder 1 has a suction pipe 7, and the upper end of the filter cylinder 1 has a strip-shaped feed inlet 8. Ionizing air bars 9 are installed on both sides of the feed inlet 8 in the upper part of the inner cavity of the filter cylinder 1. The suction pipe 7 is connected to an external negative pressure fan.

[0025] The bottom of the filter cylinder 1 is mounted on a fixing seat 11 fixed to the outer shell of the injection molding machine via a spring shock absorber; the filter cylinder is equipped with a vibration motor 19. Firstly, a multi-stage filter screen 2 is used to filter the fed plastic granules, removing non-standard granules and only feeding compliant granules into the injection molding machine. This avoids small particles that may cause uneven melt flow or surface pitting, while also preventing large particles from causing "clouding" or color differences due to delayed melting, thus ensuring consistent specifications and high-quality injection molded parts. Ions are generated by an ion bar 9 to electrostatically eliminate static electricity from the plastic granules, preventing small particles and dust from adhering to the plastic granules and entering the injection molding machine. Furthermore, negative pressure adsorption removes dust and debris generated during the collision of the plastic shell, preventing these particles from entering the injection molding machine and thus avoiding small particles that may cause uneven melt flow or surface pitting.

[0026] The filter cartridge has a discharge pipe at the bottom for discharging fine particles, and a switch valve is installed on the discharge pipe.

[0027] The ionizer 9 is fixed in the inner cavity of the filter cylinder 1 by a shock-absorbing mechanism 12. The shock-absorbing mechanism 12 includes a pair of positioning seats 13 mounted on the inner wall of the filter cylinder 1. Each positioning seat 13 has a vertically arranged through groove 14, and a mounting base 15 is installed in the through groove 14. A rubber shock-absorbing layer 16 is provided between the mounting base 15 and the through groove 14. The top of the through groove 14 is open, and a top block 17 is installed on the top of the through groove 14 to close the opening. Shock-absorbing springs 18 are provided between the mounting base 15, the bottom side of the through groove 14, and the top block 17. Both ends of the ionizer 9 are fixed to the mounting base 15. Shock-absorbing pads are provided on the bottom side of the through groove 14 and on the side of the top block 17 that contacts the shock-absorbing springs. The ion air bar 9 is fixed in the inner cavity of the filter cylinder 1 by a specific shock absorption mechanism 12. This avoids damage to the internal electronic components of the ion air bar 9 caused by vibration. The double spring shock absorption mechanism 12 has a good shock absorption effect. In addition, a rubber shock absorption layer 16 is provided between the mounting base 15 and the through groove 14 to avoid rigid contact. This has a good shock absorption effect on the ion air bar 9 and prevents vibration of the motor from damaging the ion air bar 9.

[0028] The filter cylinder 1 is equipped with a storage cylinder 20 at the top, and the feed inlet 8 is located at the bottom of the storage cylinder 20. The side wall of the storage cylinder 20 is provided with an air inlet 23 that communicates with the inner cavity of the filter cylinder 1.

[0029] The bottom of the storage cylinder 20 is provided with a docking block 21, and the port of the filter cylinder 10 is provided with a positioning block 22. The docking block 21 and the positioning block 22 are fixed together by bolts. This buffers the material and seals the top of the filter cylinder 1, allowing gas to enter through the air inlet 23. The gas carries away the ions generated by the ion bar 9 and makes full contact with the particulate material to eliminate static electricity. This prevents fine particles and dust from adhering to the plastic granules and mixing into the injection molding machine. Furthermore, the storage cylinder 20 can be disassembled for easy inspection of the ion bar 9.

[0030] Working Principle: The feeding material filtering device of this injection molding machine first filters the plastic granules through a multi-stage filter screen 2. This filters out non-standard plastic granules, allowing only compliant granules to be fed into the injection molding machine. This avoids the possibility of uneven melt flow or surface pitting caused by small particles, while also preventing "clouding" or color differences that may result from delayed melting of large particles, thus ensuring consistent specifications and high-quality injection molded parts. Ions are generated by an ion bar 9 to electrostatically eliminate static electricity from the plastic granules, preventing small particles and dust from adhering to the plastic granules and entering the injection molding machine. Furthermore, negative pressure adsorption removes dust and debris generated during the collision of the plastic shell, preventing these particles from entering the injection molding machine and thus avoiding the possibility of uneven melt flow or surface pitting caused by small particles.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A feed material filtration device for an injection molding machine, characterized in that, The filter includes a filter cylinder (1), inside which are arranged multiple inclined filter screens (2) from top to bottom, and the mesh size of the filter screens (2) decreases from top to bottom; the filter cylinder (1) is provided with a standard material outlet (3) that connects to the bottom of the lowest filter screen (2), and the standard material outlet (3) is connected to a vertically downward feeding pipe (4); the filter cylinder (1) is also provided with non-standard material outlets (5) that connect to the inclined bottom of other filter screens (2), and the filter cylinder (1) is provided with a non-standard material outlet pipe (6) that connects to the non-standard material outlet (5); the bottom of the filter cylinder (1) is provided with a suction pipe (7), and the upper end of the filter cylinder (1) is provided with a strip-shaped feed inlet (8); the upper part of the inner cavity of the filter cylinder (1) is equipped with ion air bars (9) on both sides of the feed inlet (8), and the suction pipe (7) is connected to an external negative pressure fan; The bottom of the filter cylinder (1) is mounted on a fixing seat (11) fixed to the outer shell of the injection molding machine via a spring damping seat; the filter cylinder (1) is equipped with a vibration motor (19).

2. The filter apparatus for feeding material of an injection molding machine according to claim 1, wherein The ion wind bar (9) is fixed in the inner cavity of the filter cylinder (1) by a shock absorption mechanism (12).

3. The feeding material filtering device for the injection molding machine according to claim 2, characterized in that, The shock absorption mechanism (12) includes a pair of positioning seats (13) set on the inner wall of the filter cylinder (1). Each positioning seat (13) is provided with a vertically arranged through groove (14), and an installation seat (15) is installed in the through groove (14). A rubber shock absorption layer (16) is provided between the connection between the installation seat (15) and the through groove (14). The top of the through groove (14) is open, and a top block (17) for closing the opening is installed on the top of the through groove (14). Shock absorption springs (18) are provided between the installation seat (15) and the bottom side of the through groove (14), and between the top block (17). The two ends of the ion wind bar (9) are fixed to the installation seat (15).

4. The material filtering device for the injection molding machine according to claim 3, characterized in that, The bottom side of the through groove (14) and the side of the top block (17) that contacts the damping spring (18) are both provided with damping pads.

5. The material filtering device for the injection molding machine according to claim 1, characterized in that, The filter cylinder (1) is equipped with a storage cylinder (20) at the top, and the inlet (8) is located at the bottom of the storage cylinder (20). The side wall of the storage cylinder (20) is provided with an air inlet (23) that communicates with the inner cavity of the filter cylinder (1).

6. The feeding material filtering device for the injection molding machine according to claim 5, characterized in that, The bottom of the storage cylinder (20) is provided with a docking block (21), and the port of the filter cylinder (1) is provided with a positioning block (22), and the docking block (21) and the positioning block (22) are fixed together by bolts.

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