A filtering device for injection molding machine mold cooling circulating water

Abstract

The utility model discloses a kind of filtering devices for injection molding machine mold cooling circulating water, including tank body one and the cover of installation in the upper port of tank body one, cover has water inlet, lower end surface is equipped with primary magnetic adsorption impurity removal unit, tank body one middle part is equipped with double-stage filtration unit, double-stage filtration unit has primary filtration assembly in upper side and secondary filtration assembly in lower side, the aperture of water filter hole on primary filtration assembly is greater than the aperture of water filter hole on secondary filtration assembly, tank body lower end is equipped with secondary magnetic adsorption impurity removal unit, tank body lower end still has water outlet below secondary magnetic adsorption impurity removal unit.The filtering device of the utility model makes the water quality of circulating flow cooling water in cold water machine and injection molding machine both greatly improve, and play long-term real-time filtering and impurity removal function, to effectively eliminate or reduce the failure frequency caused by circulating cooling water water quality of cold water machine and injection molding machine both not good, help to prolong injection molding machine normal operation cycle.

Description

Technical Field

[0001] This utility model relates to the technical field of cooling auxiliary equipment for plastic injection molding, specifically to a filtration device for cooling circulating water in injection molding machine molds. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. Especially in the production of PVC calcium-zinc stabilizers, injection molding tests are necessary to verify the product's dynamic thermal stability, lubricity, and adaptability to processing, in order to determine the feasibility of the calcium-zinc stabilizer formulation. The process of producing PVC plastic products using injection molding machines involves applying high pressure to molten plastic raw materials, causing them to be injected and fill the mold cavity of the injection molding machine (the mold cavity is generally called the injection molding machine mold). After cooling, the molten plastic raw materials filling the injection molding machine mold form the PVC plastic product. During the injection molding process, the injection molding machine needs to use circulating cooling water to cool the hydraulic oil and the rear end of the barrel to ensure the stability and production accuracy of the injection molding machine. The injection molding machine mold also needs to use circulating cooling water to regulate its internal temperature, in order to better control the shrinkage and cooling rate of the plastic product, thereby achieving control over the size and surface quality of the plastic product.

[0003] Existing technologies mostly use chillers to continuously supply circulating cooling water to injection molding machines. However, existing chillers have the following drawbacks in actual operation: the cooling water in the chiller tank is constantly being recycled, and this circulating cooling water is in contact with the metal mold for extended periods. Furthermore, the metal mold is constantly exposed to the working environment of PVC injection molding, so the chlorine gas released during the injection process inevitably corrodes the mold. Additionally, the prolonged immersion of the circulating cooling water in the mold leads to rust formation. Over time, rust, accumulated sludge, and other impurities from the mold continuously enter the circulating cooling water. Prolonged use of circulating cooling water containing impurities can damage the chiller and the injection molding mold, causing frequent malfunctions and even affecting their normal operation. This invention proposes a filtration device for circulating cooling water in injection molding machine molds to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects in the existing technology and provide a filtration device for cooling circulating water in injection molding machine molds. The cooling water entering the tank sequentially passes through a primary magnetic adsorption impurity removal unit to magnetically adsorb and remove magnetic impurities (such as iron, nickel, zinc, chromium, etc.), a secondary filtration unit to remove impurity particles of different sizes, and a secondary magnetic adsorption impurity removal unit to further magnetically adsorb and remove magnetic impurities. This significantly improves the quality of the circulating cooling water in both the chiller and the injection molding machine, and provides long-term, real-time filtration and impurity removal. This effectively eliminates or reduces the frequency of malfunctions in both the chiller and the injection molding machine caused by poor circulating cooling water quality, helping to extend the normal operating cycle of the injection molding machine. The overall structural design is ingenious and reasonable, with high feasibility for preparation, application, and implementation, and strong practicality.

[0005] To achieve the above objectives, the technical solution of this utility model is to design a filtration device for cooling circulating water of injection molding machine molds, including a tank and a cover installed at the upper port of the tank. The cover has a water inlet. A primary magnetic adsorption impurity removal unit located at the upper end of the tank is installed on the lower end face of the cover. A dual-stage filtration unit is installed in the middle of the tank. The dual-stage filtration unit has a primary filtration component on the upper side and a secondary filtration component on the lower side. The aperture of the filter holes on the primary filtration component is larger than the aperture of the filter holes on the secondary filtration component. A secondary magnetic adsorption impurity removal unit is installed at the lower end of the tank. The lower end of the tank also has a water outlet located below the secondary magnetic adsorption impurity removal unit. Water entering the tank from the water inlet on the cover is filtered and impurities removed sequentially by the primary magnetic adsorption impurity removal unit, the dual-stage filtration unit, and the secondary magnetic adsorption impurity removal unit before being discharged through the water outlet.

[0006] This utility model discloses a filtration device for circulating cooling water in injection molding machine molds. Cooling water entering the tank sequentially passes through a primary magnetic adsorption unit to remove magnetic impurities (such as iron, nickel, zinc, chromium, etc.), a secondary filtration unit to remove impurity particles of different sizes, and a secondary magnetic adsorption unit to further remove magnetic impurities. This significantly improves the quality of the circulating cooling water in both the chiller and the injection molding machine, providing long-term, real-time filtration and impurity removal. This effectively eliminates or reduces the frequency of malfunctions in both the chiller and the injection molding machine caused by poor circulating cooling water quality, helping to extend the normal operating cycle of the injection molding machine. The overall structure is ingeniously and rationally designed, with high feasibility for preparation, application, and implementation, and strong practicality.

[0007] The preferred technical solution is that the cover is detachably and fixedly installed on the upper end of the tank, and a sealing gasket is laid between the outer periphery of the lower end face of the cover and the upper edge of the tank wall.

[0008] The primary magnetic adsorption impurity removal unit includes an upward-opening sieve cylinder and a permanent magnet rod that is laid flat and fixed inside the sieve cylinder at intervals. The upper end of the sieve cylinder is detachably fixed to the lower end surface of the cover.

[0009] The primary filtration component is a circular filter plate, and the secondary filtration component is a funnel-shaped filter cylinder that is larger at the top and smaller at the bottom. The outer periphery of the circular filter plate and the upper edge of the funnel-shaped filter cylinder can be detachably and fixedly installed on the inner peripheral wall of the middle part of the tank.

[0010] The two-stage magnetic adsorption impurity removal unit includes a tank body two with open structures at both ends. A filter screen bottom plate is fixedly installed at the bottom of the tank body two, and the upper end of the tank body two is coaxially connected and fixed at the lower port of the funnel-shaped filter screen cylinder. Several permanent magnet rods two are vertically fixed at intervals around the upper end surface of the filter screen bottom plate. The cover is detachably fixedly installed at the upper end of the tank body one, the first-stage magnetic adsorption impurity removal unit is detachably fixedly installed on the cover, the two-stage filtration unit is detachably installed in the middle of the tank body one, and the upper end of the tank body two is fixed at the lower port of the funnel-shaped filter screen cylinder. This makes the filtration device of this utility model form an integrally detachable structure, which is convenient for later maintenance and replacement of local parts, and has good economic practicality. The funnel-shaped filter screen cylinder has a collecting function, so that the impurity particles filtered down are collected inside the tank body two at its bottom, which is convenient for regular cleaning.

[0011] A further preferred technical solution is that the cover has a downward-opening mounting cavity, and the outer peripheral wall of the cover and the upper end of the outer peripheral wall of the tank are provided with a number of sets of locking components at circumferential intervals. The cover is fixedly installed on the upper end of the tank by the locking components.

[0012] The upper end of the screen cylinder has an annular horizontal skirt extending outward. The annular horizontal skirt and the lower end face of the cover are provided with a number of corresponding mounting holes spaced apart in the circumferential direction. The screen cylinder is fixedly connected together by screw assemblies that pass through the annular horizontal skirt and the cover.

[0013] The funnel-shaped filter cylinder has an annular horizontal skirt extending outwards at its upper end. An annular horizontal eave is fixed in the middle of the inner circumferential wall of the tank. Several sets of corresponding mounting holes are spaced apart on the outer periphery of the circular filter plate, the annular horizontal skirt, and the annular horizontal eave. The annular horizontal skirt overlaps the annular horizontal eave, and the outer periphery of the circular filter plate overlaps the annular horizontal skirt. The outer periphery of the circular filter plate, the annular horizontal skirt, and the annular horizontal eave are fixedly connected together by screw assemblies that pass through the several sets of corresponding mounting holes.

[0014] The upper end of the tank body two has an annular top plate extending inward to its inner circumference, and the upper ends of several permanent magnet rods two are vertically fixed to the lower end surface of the annular top plate. The cover and the tank body one are connected together by a locking assembly, which allows for quick installation or disassembly, thus facilitating the removal of the cover to inspect or clean the components inside the tank body one. The installation or removal of the screen cylinder on the cover is simple, which facilitates the cleaning of the primary magnetic adsorption impurity removal unit. The installation and removal of the circular filter plate and the funnel-shaped filter cylinder on the tank body one is simple, making it easy to remove them for cleaning or replacement and maintenance. The installation structure of the permanent magnet rods two inside the tank body two is reasonable and has good stability.

[0015] A further preferred technical solution is that the pore size of the circular filter plate ranges from 90 to 150 μm, and the pore size ranges of both the funnel-shaped filter cylinder and the filter base plate range from 30 to 80 μm. The reasonable design of the pore sizes of the circular filter plate in the primary filtration assembly, the funnel-shaped filter cylinder in the secondary filtration assembly, and the filter base plate ensures that the dual-stage filtration unit has the functions of coarse filtration at the top and dual fine filtration at the bottom. Through the synergistic cooperation of the coarse and fine filtration components, the cooling water quality is significantly improved. The reasonable structural design allows impurities in the circulating cooling water to be efficiently filtered out and deposited on the filter base plate.

[0016] A further preferred technical solution includes a stirring paddle rotatably installed inside the funnel-shaped filter cylinder, with the upper end of the stirring shaft of the stirring paddle vertically fixed at the center of the circular filter plate. Under the action of water flow, the blades on the stirring paddle rotate, thereby agitating and dispersing the water flow, further ensuring that the outer peripheral wall of the funnel-shaped filter cylinder uniformly and fully exerts its filtration function, and avoiding localized accumulation of impurities and clogging.

[0017] A further preferred technical solution is that the inlet of the cover is fixedly provided with an inlet pipe head extending to the top therefrom, the upper end of the inlet pipe head is connected to the outlet of the chiller, and the inlet pipe head is provided with branch pipe one, valve one and branch pipe two in sequence from top to bottom, the branch pipe two is connected to the sewage system, and the branch pipe two is provided with valve two.

[0018] The water outlet is located at the bottom of the tank body one. A downward-extending water outlet connector is fixed inside the water outlet at the bottom of the tank body one. The lower end of the water outlet connector is connected to the cooling water inlet of the injection molding machine via a pipe. From top to bottom, the water outlet connector has a branch pipe three and a valve three. The branch pipe three is connected to the branch pipe one via a backwash pipe. The backwash pipe has a valve four at its upper end and a valve five at its lower end. A backwash pipe is provided between the water inlet and outlet at both ends of the tank body one. The water inlet connector, water outlet connector, and backwash pipe are equipped with cooperating valves to ensure that the filter device of this invention has normal filtration and periodic backwashing functions, thereby significantly simplifying the periodic cleaning of the filter element components inside the filter device and helping to extend its maintenance and cleaning cycle.

[0019] A further preferred technical solution is that the tank body one, cover body, sieve cylinder, circular filter plate, funnel-shaped filter cylinder, tank body two, and stirring paddle are all made of stainless steel. Stainless steel has good corrosion resistance, ensuring that the filtration device of this invention has a long service life.

[0020] The advantages and beneficial effects of this utility model are as follows:

[0021] 1. This utility model discloses a filtration device for circulating cooling water in injection molding machine molds. The cooling water entering the tank sequentially passes through a primary magnetic adsorption impurity removal unit to magnetically adsorb and remove magnetic impurities (such as iron, nickel, zinc, chromium, etc.), a secondary filtration unit to filter and remove impurity particles of different sizes, and a secondary magnetic adsorption impurity removal unit to further magnetically adsorb and remove magnetic impurities. This significantly improves the quality of the circulating cooling water in both the chiller and the injection molding machine, and provides long-term real-time filtration and impurity removal. This effectively eliminates or reduces the frequency of malfunctions in both the chiller and the injection molding machine caused by poor circulating cooling water quality, and helps extend the normal operating cycle of the injection molding machine. The overall structure is ingeniously and reasonably designed, with high feasibility for preparation, application, and implementation, and strong practicality.

[0022] 2. The cover is detachably fixed to the upper end of the first tank body; the primary magnetic adsorption impurity removal unit is detachably fixed to the cover body; the dual-stage filtration unit is detachably installed in the middle of the first tank body; and the upper end of the second tank body is fixed to the lower port of the funnel-shaped filter cylinder. This makes the filtration device of this utility model form an integrally detachable structure, which is convenient for later maintenance and replacement of local parts, and has good economic practicality. The funnel-shaped filter cylinder has a collecting function, so that the impurity particles filtered down are collected in the interior of the second tank body at its bottom, which is convenient for regular cleaning.

[0023] 3. The cover and tank body one are connected by a locking assembly, which allows for quick installation or disassembly. This facilitates the removal of the cover to inspect or clean the components inside tank body one. The installation or removal of the screen cylinder on the cover is simple, making it easy to clean the primary magnetic adsorption impurity removal unit. The installation and removal of the circular filter plate and the funnel-shaped filter cylinder on tank body one are simple, making it easy to remove them for cleaning or replacement and maintenance. The permanent magnet rod two has a reasonable installation structure inside tank body two, which is very secure.

[0024] 4. The pore size range of the circular filter plate is 90~150μm, and the pore size range of both the funnel-shaped filter cylinder and the filter bottom plate is 30~80μm. The pore size design of the circular filter plate in the primary filtration assembly, the funnel-shaped filter cylinder and the filter bottom plate in the secondary filtration assembly is reasonable, ensuring that the dual-stage filtration unit has the functions of coarse filtration at the top and double fine filtration at the bottom. Through the synergistic cooperation of the coarse and fine filtration components, the cooling water quality is significantly improved. The reasonable structural design allows impurities in the circulating cooling water to be efficiently filtered out and deposited on the filter bottom plate.

[0025] 5. It also includes a stirring paddle rotatably installed inside the funnel-shaped filter cylinder, with the upper end of the stirring shaft of the stirring paddle vertically fixed at the center of the circular filter plate. Under the action of water flow, the blades on the stirring paddle rotate, thereby agitating and dispersing the water flow, further ensuring that the outer peripheral wall of the funnel-shaped filter cylinder can uniformly and fully exert its filtration function, and avoiding localized accumulation of impurities that could cause blockage.

[0026] 6. A backwashing pipe is provided between the water inlet and outlet at both ends of the tank body, and valves are provided on the water inlet connector, water outlet connector and backwashing pipe to ensure that the filter device of this utility model has normal filtration and periodic backwashing and sewage discharge functions, thereby greatly simplifying the difficulty of periodic cleaning of the filter element components inside the filter device and helping to extend its maintenance and cleaning cycle. Attached Figure Description

[0027] Figure 1 This is a diagram illustrating the usage status of a filtration device for cooling circulating water in injection molding machine molds according to this utility model.

[0028] Figure 2 This is a longitudinal sectional view of a filtration device for cooling circulating water in injection molding machine molds according to this utility model;

[0029] Figure 3 yes Figure 2 A magnified view of a section at point S1;

[0030] Figure 4 yes Figure 2 A magnified view of a section at point S2;

[0031] Figure 5 This is a 3D view of the primary magnetic adsorption impurity removal unit;

[0032] Figure 6 This is a three-dimensional diagram of the secondary magnetic adsorption impurity removal unit.

[0033] In the diagram: A. Filtration device; B. Chiller; C. Injection molding machine; D. Outlet pipe 1; E. Outlet pipe 2; F. Return pipe; g. Valve 1; h. Valve 2; i. Valve 3; j. Valve 4; k. Valve 5; 1. Tank 1; 2. Cover; 3. Screen cylinder; 4. Permanent magnet rod 1; 5. Circular filter screen plate; 6. Funnel-shaped filter screen cylinder; 7. Tank 2; 8. Permanent magnet rod 2; 9. Agitator; 10. Inlet water connector; 11. Outlet water connector; 12. Locking assembly; 13. Sealing gasket; 14. Screw assembly; 15. Backwash pipe; 1-1. Annular horizontal eaves; 3-1. Annular horizontal skirt 1; 6-1. Annular horizontal skirt 2; 7-1. Annular top plate; 7-2. Filter screen bottom plate; 10-1. Branch pipe 1; 10-2. Branch pipe 2; 11-1. Branch pipe 3. Detailed Implementation

[0034] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0035] Example

[0036] like Figures 2-6 As shown, a filtration device for cooling circulating water in injection molding machine molds includes a tank 1 and a cover 2 installed on the upper port of the tank 1. The cover 2 has a water inlet. A primary magnetic adsorption impurity removal unit located inside the upper part of the tank 1 is installed on the lower end face of the cover 2. A dual-stage filtration unit is installed in the middle of the tank 1. The dual-stage filtration unit has a primary filtration component on the upper side and a secondary filtration component on the lower side. The aperture of the filter holes on the primary filtration component is larger than the aperture of the filter holes on the secondary filtration component. A secondary magnetic adsorption impurity removal unit is installed at the lower end of the tank 1. The lower end of the tank 1 also has a water outlet located below the secondary magnetic adsorption impurity removal unit. Water entering the tank 1 from the water inlet on the cover 2 is filtered and impurities removed sequentially by the primary magnetic adsorption impurity removal unit, the dual-stage filtration unit, and the secondary magnetic adsorption impurity removal unit before being discharged through the water outlet.

[0037] Preferably, the cover 2 is detachably fixedly installed on the upper end of the tank 1, and a sealing gasket 13 is laid between the outer periphery of the lower end face of the cover 2 and the upper edge of the peripheral wall of the tank 1.

[0038] The primary magnetic adsorption impurity removal unit includes an upward-opening screen cylinder 3 and permanent magnet rods 4 laid flat and fixed inside the screen cylinder 3 at intervals. The upper end of the screen cylinder 3 is detachably fixed to the lower end surface of the cover body 2.

[0039] The primary filtration component is a circular filter plate 5, and the secondary filtration component is a funnel-shaped filter cylinder 6 that is larger at the top and smaller at the bottom. The outer periphery of the circular filter plate 5 and the upper edge of the funnel-shaped filter cylinder 6 can be detachably and fixedly installed on the inner peripheral wall of the middle part of the tank body 1.

[0040] The secondary magnetic adsorption impurity removal unit includes a tank 2 7 with an open structure at both the top and bottom. A filter screen bottom plate 7-2 is fixedly installed at the bottom of the tank 2 7. The upper end of the tank 2 7 is coaxially connected and fixed at the lower port of the funnel-shaped filter screen cylinder 6. Several permanent magnet rods 2 8 are fixedly installed circumferentially at intervals on the upper end surface of the filter screen bottom plate 7-2.

[0041] More preferably, the cover 2 has a downward-opening mounting cavity, and the outer peripheral wall of the cover 2 and the upper end of the outer peripheral wall of the tank 1 are provided with a plurality of sets of locking components 12 at circumferential intervals. The cover 2 is fixedly installed on the upper end of the tank 1 by the plurality of sets of locking components 12.

[0042] The upper end of the sieve cylinder 3 has an annular horizontal skirt 3-1 extending outward. The annular horizontal skirt 3-1 and the lower end face of the cover 2 are provided with a number of corresponding mounting holes spaced apart in the circumferential direction. The sieve cylinder 3 is fixedly connected together by screw assemblies 14 that pass through the annular horizontal skirt 3-1 and the cover 2.

[0043] The funnel-shaped filter cylinder 6 has an annular horizontal skirt 6-1 extending outward to the upper end. An annular horizontal eave 1-1 is fixed in the middle of the inner wall of the tank body 1. The outer periphery of the circular filter plate 5, the annular horizontal skirt 6-1, and the annular horizontal eave 1-1 are provided with several sets of corresponding mounting holes 2 spaced apart in a circumferential direction. The annular horizontal skirt 6-1 overlaps the annular horizontal eave 1-1. The outer periphery of the circular filter plate 5 overlaps and is laid on the annular horizontal skirt 6-1. The outer periphery of the circular filter plate 5, the annular horizontal skirt 6-1, and the annular horizontal eave 1-1 are fixedly connected together by screw assemblies 14 that pass through the several sets of corresponding mounting holes 2.

[0044] The upper end of the tank body 7 has an annular top plate 7-1 extending to its inner circumference, and the upper ends of several permanent magnet rods 8 are vertically fixed on the lower end surface of the annular top plate 7-1.

[0045] More preferably, the pore size of the circular filter plate 5 is in the range of 90~150μm, and the pore size of both the funnel-shaped filter cylinder 6 and the filter bottom plate 7-2 is in the range of 30~80μm.

[0046] More preferably, it also includes a stirring paddle 9 rotatably installed inside the funnel-shaped filter cylinder 6, with the upper end of the stirring shaft of the stirring paddle 9 vertically fixed at the center position of the circular filter plate 5.

[0047] More preferably, the inlet of the cover 2 is fixedly provided with an inlet pipe 10 extending to its upper part. The upper end of the inlet pipe 10 is connected to the outlet of the chiller B. The inlet pipe 10 is provided with a branch pipe 10-1, a valve 1g and a branch pipe 2 10-2 in sequence from top to bottom. The branch pipe 2 10-2 is connected to the sewage system. The branch pipe 2 10-2 has a valve 2h.

[0048] The water outlet is located at the bottom of the tank body 1. Inside the water outlet at the bottom of the tank body 1, a downward-extending water outlet connector 11 is fixed. The lower end of the water outlet connector 11 is connected to the cooling water inlet of the injection molding machine C through a pipe. The water outlet connector 11 is provided with a branch pipe 3 11-1 and a valve 3i from top to bottom. The branch pipe 3 11-1 is connected to the branch pipe 10-1 through a backwash pipe 15. The backwash pipe 15 has a valve 4j at the upper end and a valve 5k at the lower end.

[0049] More preferably, the tank body 1, cover body 2, sieve cylinder 3, circular filter plate 5, funnel-shaped filter cylinder 6, tank body 2, and stirring paddle 9 are all made of stainless steel.

[0050] The working principle of the filtration device A for cooling circulating water of injection molding machine molds according to this utility model is as follows:

[0051] In use, connect the upper port of the inlet water connector 10 to the outlet of the chiller B via the outlet water pipe 1D; connect the lower port of the outlet water connector 11 to the cooling water inlet of the injection molding machine C via the outlet water pipe 2E; and connect the cooling water outlet of the injection molding machine C to the inlet of the chiller B via the return water pipe F (see Appendix). Figure 1During normal injection molding operation, valves 1g and 3i are open, while valves 2h, 4j, and 5k are closed. Cooling water at lower temperatures from chiller B enters tank 1 through outlet pipe 1D and inlet pipe 10, and then sequentially undergoes magnetic adsorption purification by a primary magnetic adsorption unit, dual filtration by a primary and secondary filtration unit, and further magnetic adsorption purification by a secondary magnetic adsorption unit before entering injection molding machine C through outlet pipe 2E. Higher-temperature cooling water exiting from the cooling water outlet of injection molding machine C returns to the injection molding machine via return pipe F. The water flows into the chiller B, forming a cooling water circulation loop. When backwashing of the filter device A is required, valves 1g and 3i are closed, and valves 2h, 4j, and 5k are opened. The flushing water then enters the tank 1 through the backwash pipe 15, the outlet pipe 11, and the outlet to backwash the components. The wastewater from the cleaning enters the sewage system through branch pipe 210-2. After cleaning, valves 1g and 3i are reopened, and valves 2h, 4j, and 5k are closed, allowing the normal injection molding process to begin.

[0052] This utility model discloses a filtration device for circulating cooling water in injection molding machine molds. Cooling water entering the tank sequentially passes through a primary magnetic adsorption unit to remove magnetic impurities (such as iron, nickel, zinc, chromium, etc.), a secondary filtration unit to remove impurity particles of different sizes, and a secondary magnetic adsorption unit to further remove magnetic impurities. This significantly improves the quality of the circulating cooling water in both the chiller and the injection molding machine, providing long-term, real-time filtration and impurity removal. This effectively eliminates or reduces the frequency of malfunctions in both the chiller and the injection molding machine caused by poor circulating cooling water quality, helping to extend the normal operating cycle of the injection molding machine. The overall structure is ingeniously and rationally designed, with high feasibility for preparation, application, and implementation, and strong practicality.

[0053] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A filtration device for cooling circulating water in injection molding machine molds, characterized in that, The device includes a tank (1) and a cover (2) installed on the upper port of the tank (1). The cover (2) has a water inlet. A primary magnetic adsorption impurity removal unit located at the upper end of the tank (1) is installed on the lower end face of the cover (2). A dual-stage filtration unit is installed in the middle of the tank (1). The dual-stage filtration unit has a primary filtration component located on the upper side and a secondary filtration component located on the lower side. The aperture of the filter holes on the primary filtration component is larger than the aperture of the filter holes on the secondary filtration component. A secondary magnetic adsorption impurity removal unit is installed at the lower end of the tank (1). The lower end of the tank (1) also has a water outlet located below the secondary magnetic adsorption impurity removal unit. Water entering the tank (1) from the water inlet on the cover (2) is filtered and impurity removed by the primary magnetic adsorption impurity removal unit, the dual-stage filtration unit, and the secondary magnetic adsorption impurity removal unit in sequence, and then discharged through the water outlet.

2. The filtration device for cooling circulating water of injection molding machine molds as described in claim 1, characterized in that, The cover (2) is detachably fixed to the upper end of the tank (1), and a sealing gasket (13) is laid between the outer periphery of the lower end face of the cover (2) and the upper edge of the peripheral wall of the tank (1). The primary magnetic adsorption impurity removal unit includes an upward-opening sieve cylinder (3) and permanent magnet rods (4) laid flat and fixed inside the sieve cylinder (3) at intervals. The upper end of the sieve cylinder (3) is detachably fixed to the lower end surface of the cover (2). The primary filtration component is a circular filter plate (5), and the secondary filtration component is a funnel-shaped filter cylinder (6) that is larger at the top and smaller at the bottom. The outer periphery of the circular filter plate (5) and the upper edge of the funnel-shaped filter cylinder (6) can be detachably and fixedly installed on the inner periphery of the middle part of the tank body (1). The secondary magnetic adsorption impurity removal unit includes a tank (7) with an open structure at both the top and bottom. A filter screen bottom plate (7-2) is fixed at the bottom of the tank (7). The upper end of the tank (7) is coaxially connected and fixed at the lower port of the funnel-shaped filter screen cylinder (6). Several permanent magnet rods (8) are fixedly fixed at intervals around the upper end surface of the filter screen bottom plate (7-2).

3. The filtration device for cooling circulating water of injection molding machine molds as described in claim 2, characterized in that, The cover (2) has an installation cavity with an opening facing downwards, and the outer peripheral wall of the cover (2) and the upper end of the outer peripheral wall of the tank (1) are provided with a number of locking components (12) at intervals around each other. The cover (2) is fixedly installed on the upper end of the tank (1) by the locking components (12). The upper end of the sieve cylinder (3) has an annular horizontal skirt (3-1) extending outward. The annular horizontal skirt (3-1) and the lower end face of the cover (2) are provided with a number of corresponding mounting holes spaced apart in the circumference. The sieve cylinder (3) is fixedly connected together by screw assemblies (14) that pass through the annular horizontal skirt (3-1) and the cover (2). The funnel-shaped filter cylinder (6) has an annular horizontal skirt (6-1) extending outward to the outer periphery at the upper end. An annular horizontal eave (1-1) is fixed in the middle of the inner periphery of the tank body (1). Several sets of corresponding mounting holes are spaced apart on the outer periphery of the circular filter plate (5), the annular horizontal skirt (6-1) and the annular horizontal eave (1-1). The annular horizontal skirt (6-1) overlaps the annular horizontal eave (1-1). The outer periphery of the circular filter plate (5) overlaps the annular horizontal skirt (6-1). The outer periphery of the circular filter plate (5) is laid on the annular horizontal skirt (6-1). The outer periphery of the circular filter plate (5), the annular horizontal skirt (6-1) and the annular horizontal eave (1-1) are fixedly connected together by screw assemblies (14) that pass through the interior of several sets of corresponding mounting holes. The upper end of the tank body 2 (7) has an annular top plate (7-1) extending to its inner circumference, and the upper ends of several permanent magnet rods 2 (8) are vertically fixed on the lower end surface of the annular top plate (7-1).

4. The filtration device for cooling circulating water of injection molding machine molds as described in claim 3, characterized in that, The pore size of the circular filter plate (5) is 90~150μm, and the pore size of both the funnel-shaped filter cylinder (6) and the filter bottom plate (7-2) is 30~80μm.

5. The filtration device for cooling circulating water of injection molding machine molds as described in claim 4, characterized in that, It also includes a stirring paddle (9) that is rotatably installed inside the funnel-shaped filter cylinder (6), with the upper end of the stirring shaft of the stirring paddle (9) vertically fixed at the center of the circular filter plate (5).

6. The filtration device for cooling circulating water of injection molding machine molds as described in claim 5, characterized in that, The inlet of the cover (2) is fixedly provided with an inlet pipe head (10) extending to its upper part. The upper end of the inlet pipe head (10) is connected to the outlet of the chiller (B). The inlet pipe head (10) is provided with branch pipe one (10-1), valve one (g) and branch pipe two (10-2) from top to bottom. The branch pipe two (10-2) is connected to the sewage system. The branch pipe two (10-2) has valve two (h). The outlet is located at the bottom of the tank body (1). Inside the outlet at the bottom of the tank body (1), a downward-extending water outlet connector (11) is fixed. The lower end of the water outlet connector (11) is connected to the cooling water inlet of the injection molding machine (C) through a pipe. The water outlet connector (11) is provided with a branch pipe three (11-1) and a valve three (i) from top to bottom. The branch pipe three (11-1) is connected to the branch pipe one (10-1) through a backwash pipe (15). The backwash pipe (15) has a valve four (j) at the upper end and a valve five (k) at the lower end.

7. The filtration device for cooling circulating water of injection molding machine molds as described in claim 6, characterized in that, The tank body (1), cover (2), sieve cylinder (3), circular filter plate (5), funnel-shaped filter cylinder (6), tank body (7) and stirring paddle (9) are all made of stainless steel.

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