Injection molding machine oil tank filtering mechanism and injection molding machine oil tank assembly

Abstract

The application discloses an injection molding machine oil tank filtering mechanism and an injection molding machine oil tank assembly, which comprise a hollow sleeve, an interception assembly and a suction accessory; the interception assembly comprises a filter cartridge, a fixed cylinder, a one-way valve and an elastic skirt; the filter cartridge is fixedly installed in the hollow sleeve; the fixed cylinder is fixedly installed on the filter cartridge; the top end of the fixed cylinder extends to the outside of the hollow sleeve and is provided with a plurality of openings for arranging the one-way valve; the elastic skirt is arranged on the outer wall of the fixed cylinder and is located below the one-way valve and extends to abut against the top wall of the inner cavity of the hollow sleeve; and the suction accessory is arranged in the hollow sleeve and is used for adsorbing the iron filings in the containing cavity. The application relates to the technical field of injection molding machine oil tank filtering, and through the above arrangement, the iron filings can be prevented from flowing reversely into the oil tank during oil return under the premise of ensuring the iron filings interception effect, so that the oil quality in the oil tank is improved and the service life of the oil tank body is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of injection molding machines and relates to filtration technology, specifically an injection molding machine oil tank filtration mechanism and an injection molding machine oil tank assembly. Background Technology

[0002] An injection molding machine is a primary molding device that uses plastic molds to produce various shapes of plastic products from thermoplastic or thermosetting plastics. The oil tank is a crucial component of the injection molding machine, providing sufficient hydraulic oil to the hydraulic system to ensure its normal operation.

[0003] In existing technologies, to improve the efficiency of hydraulic system supply and stable pressure control, the oil port of the injection molding machine's oil tank is typically connected to the cylinder via a connecting pipe equipped with a filling valve. This allows the filling valve to safely return excess hydraulic oil to the oil tank when there is excess hydraulic oil in the system or when a specific action switch is required. For example, after the pressure holding phase, when the system pressure needs to be reduced, the filling valve opens to allow the hydraulic oil to flow back smoothly, thereby preventing excessive hydraulic system pressure from damaging the equipment.

[0004] Currently, injection molding machine oil tanks generally adopt a welded structure. While this structure is robust, iron filings are easily generated at the weld seams, becoming a major source of cylinder contamination. To address this issue, existing technologies typically employ a filter-type interceptor placed in the oil passage between the oil tank and the cylinder to intercept iron filings. However, this filter-type interceptor only intercepts iron filings during the oil discharge process. When the filling valve performs the return oil operation, the intercepted iron filings can easily flow back into the oil tank with the hydraulic oil backflow, thus re-contaminating the tank. Furthermore, during this process, the force of the hydraulic oil injection may cause the iron filings to collide with the inner wall of the oil tank, leading to tank rupture and oil leakage, posing a certain safety hazard.

[0005] Therefore, there is a need for an injection molding machine oil tank filtration mechanism and an injection molding machine oil tank assembly to solve the above problems. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes an oil tank filter mechanism and an oil tank assembly for injection molding machines, which can achieve efficient interception of iron filings during the oil discharge process and prevent iron filings from flowing back into the oil tank body due to the impact force of hydraulic oil during the oil return process, thereby improving the oil quality in the oil tank and extending the service life of the oil tank body. This invention incorporates a hollow sleeve, a filter cylinder, a fixed cylinder, a one-way valve, an elastic skirt, an interception assembly, and an adsorption component. The elastic skirt abuts against the inner top wall of the hollow sleeve, and the one-way valve bulges away from the filter cylinder, forming two one-way flow channels within the filtration mechanism. When hydraulic oil carrying iron filings flows through one channel to exit, the iron filings are intercepted by the filter cylinder and adsorbed by the adsorption component. When hydraulic oil flows through the other channel to return, the iron filings are not affected by the impact force of the hydraulic oil in that channel and do not flow back. This effectively ensures that iron filings do not flow backward into the oil tank during oil return, thereby improving the oil quality within the tank and extending the service life of the tank.

[0007] To achieve the above objectives, a first aspect of the present invention provides an oil tank filtration mechanism for an injection molding machine, comprising a hollow sleeve, an interception component, and an adsorption component;

[0008] The interception assembly includes a filter cartridge, a fixed cartridge, a one-way valve, and an elastic skirt.

[0009] The filter cartridge is fixedly installed inside the hollow sleeve, and a first annular gap is formed between it and the inner wall of the hollow sleeve.

[0010] The fixed cylinder is fixedly installed on the filter cylinder, and a second annular gap is formed between the outer wall and the hollow sleeve;

[0011] The top end of the fixed cylinder extends to the outside of the hollow sleeve and has multiple openings for setting the one-way valve.

[0012] The one-way valve can bulge in a direction away from the filter cartridge to open the opening;

[0013] The elastic skirt is disposed on the outer wall of the fixed cylinder and located below the one-way valve, and extends to abut against the top wall of the inner cavity of the hollow sleeve, so as to form a receiving cavity around the first annular gap;

[0014] The adsorption element is disposed inside the hollow sleeve and is used to adsorb iron filings in the receiving cavity.

[0015] Furthermore, the outer wall of the filter cylinder is provided with multiple filter screens arranged in a ring at equal intervals, and the multiple filter screens are arranged at an angle.

[0016] Furthermore, the filter cartridge is configured as a frustum-shaped structure, with its outer diameter increasing from top to bottom.

[0017] Furthermore, the top of the fixed cylinder is configured as an arc-shaped structure.

[0018] Furthermore, the adsorption element is configured as a ring electromagnet and is located in the middle of the hollow sleeve, and a controller for controlling the ring electromagnet to be energized or de-energized is provided outside the hollow sleeve.

[0019] Furthermore, the middle part of the hollow sleeve is made of PVC resin.

[0020] Furthermore, both ends of the hollow sleeve are respectively provided with flanges for connecting with external pipe fittings.

[0021] On the other hand, the present invention also proposes an injection molding machine oil tank assembly, including an oil tank body, a connecting pipe, and the injection molding machine oil tank filter mechanism described in the above embodiments;

[0022] The two ends of the hollow sleeve are respectively connected to the oil pipe of the oil tank body and the connecting pipe, and the end of the fixed cylinder away from the filter cylinder is placed inside the oil pipe of the oil tank body.

[0023] Furthermore, when hydraulic oil is output from the tank body to the connecting pipe under external force, the elastic skirt separates from the top wall of the hollow sleeve cavity and the one-way valve remains stationary, so as to open the receiving cavity and allow the hydraulic oil to pass through the second annular gap and the outer wall of the filter cylinder in sequence to enter the connecting pipe.

[0024] Furthermore, when hydraulic oil is output from the connecting pipe to the inside of the tank body under external force, the one-way valve bulges and the elastic skirt abuts against the top wall of the hollow sleeve cavity to open the opening, allowing hydraulic oil to enter the tank body through the opening.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] By incorporating a hollow sleeve, a filter cylinder, a fixed cylinder, a one-way valve, an elastic skirt, and an adsorption component, and ensuring that the elastic skirt abuts against the inner top wall of the hollow sleeve, and that the one-way valve bulges away from the filter cylinder, two one-way flow channels are formed within the filtration mechanism. When hydraulic oil carrying iron filings flows out through one channel, the iron filings are intercepted by the filter cylinder and adsorbed by the adsorption component. When hydraulic oil flows back through the other channel, the iron filings are not affected by the impact force of the hydraulic oil in that channel and do not flow back. This effectively ensures that iron filings do not flow backward into the oil tank body during oil return, thereby improving the oil quality in the oil tank body and extending the service life of the oil tank body. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a cross-sectional view of the oil tank filtration mechanism of an injection molding machine according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the oil tank filter mechanism of an injection molding machine in one embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the operating structure of the oil tank body in the injection molding machine oil tank assembly when oil is discharged, according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the operating structure of the oil tank body in the oil tank assembly of an injection molding machine during oil return in one embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the injection molding machine oil tank assembly in another embodiment of the present invention.

[0033] Icon labels:

[0034] 1. Hollow sleeve; 2. Interception component; 21. Filter cartridge; 211. Filter screen; 22. Fixing cylinder; 23. One-way valve; 24. Elastic skirt; 3. Adsorption component; 31. Controller; 4. Receiving cavity; 5. Oil tank body; 51. Annular limiting protrusion; 6. Connecting pipe. Detailed Implementation

[0035] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1

[0037] Please see Figures 1 to 4 The first aspect of the present invention provides an oil tank filtration mechanism for an injection molding machine, including a hollow sleeve 1, an interception component 2, and an adsorption component 3.

[0038] The interception component 2 includes a filter cylinder 21, a fixing cylinder 22, a one-way valve 23, and an elastic skirt 24.

[0039] Specifically, the filter cylinder 21 is fixedly installed inside the hollow sleeve 1, and a first annular gap is formed between it and the inner wall of the hollow sleeve 1. This allows hydraulic oil to pass through the first annular gap into the filter cylinder 21 when oil is discharged from the oil tank body 5, so that the filter cylinder 21 can intercept iron filings mixed in with the hydraulic oil.

[0040] In addition, the fixed cylinder 22 is fixedly installed on the filter cylinder 21, and a second annular gap is formed between the outer wall and the hollow sleeve 1 for the one-way entry of hydraulic oil.

[0041] Specifically, the elastic skirt 24 is disposed on the outer wall of the fixed cylinder 22, located below the one-way valve 23, and extends to abut against the top wall of the inner cavity of the hollow sleeve 1, so as to form a receiving cavity 4 around the first annular gap. Therefore, when the elastic skirt 24 is pressed down by the force of hydraulic oil flow (such as... Figure 3 As shown), this allows hydraulic oil to enter the receiving cavity 4 from the second annular gap, and then be intercepted by the filter cartridge 21, completing the removal of iron filings; while when the elastic skirt 24 is not subject to the force of hydraulic oil flow or moves upward due to the force of hydraulic oil flow (as shown) Figure 4 As shown), the elastic skirt 24 blocks the second annular gap, preventing iron filings from being discharged from the receiving cavity 4. This effectively prevents iron filings from flowing back into the oil tank body 5, thereby improving the oil quality in the oil tank body 5 and extending the service life of the oil tank body 5.

[0042] The top end of the fixed cylinder 22 extends to the outside of the hollow sleeve 1 and has multiple openings for setting the one-way valve 23 for hydraulic oil return flow, so that the hydraulic oil return path and the hydraulic oil outlet path are independent of each other.

[0043] Specifically, the one-way valve 23 can bulge in a direction away from the filter cylinder 21 to open the opening. That is, the one-way valve 23 will only open when it is subjected to the vertical upward force of hydraulic oil, and will remain stationary when subjected to the vertical downward force of hydraulic oil (i.e., oil is coming out of the oil tank body 5). This makes the return path and the outlet path of hydraulic oil relatively independent.

[0044] In this embodiment, the adsorption element 3 is disposed inside the hollow sleeve 1 to adsorb iron filings in the receiving cavity 4, that is, to adsorb iron filings during oil return, thereby further preventing iron filings from flowing back.

[0045] This device comprises a hollow sleeve 1, an interception assembly 2 including a filter cylinder 21, a fixed cylinder 22, a one-way valve 23, and an elastic skirt 24, and an adsorption component 3. The elastic skirt 24 abuts against the inner top wall of the hollow sleeve 1, and the one-way valve 23 can bulge in the direction away from the filter cylinder 21 to form two one-way flow channels in the filtration mechanism. When hydraulic oil carrying iron filings flows out from one channel (i.e., from the second surrounding gap into the receiving cavity 4), the iron filings can be intercepted by the filter cylinder 21 and adsorbed by the adsorption component 3. When hydraulic oil flows back from the other channel (i.e. from the opening), the iron filings will not be affected by the impact force of the hydraulic oil in that channel and will not flow back. This effectively ensures that the iron filings will not flow back into the oil tank body 5 when returning oil, thereby improving the oil quality in the oil tank body 5 and extending the service life of the oil tank body 5.

[0046] Furthermore, when hydraulic oil returns, an impact force is applied to some iron filings remaining on the outer wall of the filter cylinder 21 that have not been adsorbed by the adsorption element 3. Under this impact force, the iron filings will move towards the adsorption element 3 and thus be adsorbed by the adsorption element 3. This not only cleans the filter components on the outer wall of the filter cylinder 21 but also accelerates the adsorption of iron filings by the adsorption element 3. This reduces the interception pressure of the filter cylinder 21 on iron filings when dealing with subsequent repeated oil discharge operations and extends the service life of the filter cylinder 21.

[0047] In this embodiment, the outer wall of the filter cylinder 21 is provided with a plurality of filter screens 211 arranged in a ring at equal intervals, and the plurality of filter screens 211 are arranged at an angle to increase the interception area of ​​iron filings and improve the interception effect.

[0048] The filter cylinder 21 is configured as a frustum-shaped structure with an outer diameter that increases from top to bottom. This allows the iron filings attached to the surface of the filter screen 211 to move upward under the impact of the hydraulic oil return, thereby increasing the probability that the iron filings will be adsorbed by the adsorption element 3.

[0049] In other embodiments, to prevent iron filings contained in the hydraulic oil from accumulating on the fixed cylinder 22 during oil discharge, the top of the fixed cylinder 22 is further defined. Specifically, the top of the fixed cylinder 22 is configured with an arc-shaped structure, so that the iron filings can quickly enter the receiving cavity 4 along the second annular gap under the guidance of the arc-shaped top of the fixed cylinder 22, thereby avoiding the occurrence of iron filings residue or accumulation.

[0050] In this embodiment, the adsorption element 3 is configured as an annular electromagnet and is disposed in the middle of the hollow sleeve 1, and a controller 31 for controlling the annular electromagnet to be energized or de-energized is disposed outside the hollow sleeve 1.

[0051] It should be noted that the middle part of the hollow sleeve 1 is made of PVC resin, that is, the middle part of the hollow sleeve 1 is made of non-conductive and non-magnetic material, so as to avoid interference with the application of the annular electromagnet.

[0052] In addition, both ends of the hollow sleeve 1 are respectively provided with flanges for connecting with external pipe fittings.

[0053] In a further embodiment, a cleaning method for the oil tank filter mechanism of an injection molding machine after use is also proposed to facilitate quick cleaning of the filter mechanism, specifically including the following steps:

[0054] S1. The annular electromagnet is de-energized by the controller 31, so that the annular electromagnet no longer exerts an adsorption force on the iron filings. Therefore, the iron filings accumulate in the receiving cavity 4 under the action of gravity.

[0055] S2. Manually press the elastic skirt 24 down until it fits against the outer wall of the filter cylinder 21, so that the iron filings can be discharged through the second annular gap;

[0056] S3. Invert the filter mechanism and connect the filter cylinder 21 to a water outlet pipe. The iron filings are discharged by the impact force of the water sprayed from the water outlet pipe and the weight of the iron filings themselves.

[0057] Therefore, by following the above steps, the iron filings can be discharged quickly, thereby improving the cleaning effect on the filter mechanism and extending its service life.

[0058] Example 2

[0059] like Figure 3 and Figure 4 As shown, this embodiment proposes an injection molding machine oil tank assembly based on embodiment one, including an oil tank body 5, a connecting pipe 6, and the injection molding machine oil tank filter mechanism described in the above embodiment.

[0060] The hollow sleeve 1 is connected at both ends to the oil pipe of the oil tank body 5 and the connecting pipe 6, respectively, and the end of the fixed cylinder 22 away from the filter cylinder 21 is placed inside the oil pipe of the oil tank body 5.

[0061] When hydraulic oil is output from the oil tank body 5 to the connecting pipe 6 under external force, the elastic skirt 24 separates from the top wall of the inner cavity of the hollow sleeve 1 and the one-way valve 23 remains stationary, so as to open the receiving cavity 4 and allow the hydraulic oil to pass through the second annular gap and the outer wall of the filter cylinder 21 in sequence to enter the connecting pipe 6.

[0062] When hydraulic oil is output from the connecting pipe 6 to the inside of the oil tank body 5 under external force, the one-way valve 23 bulges up and the elastic skirt 24 abuts against the top wall of the inner cavity of the hollow sleeve 1 to open the opening, so that the hydraulic oil enters the oil tank body 5 through the opening.

[0063] The above settings effectively ensure that iron filings will not flow backward into the oil tank body 5 during oil return, thereby improving the oil quality in the oil tank body 5 and extending the service life of the oil tank body 5.

[0064] In addition, such as Figure 5 As shown, to further facilitate the cleaning of the filter mechanism, the hollow sleeve 1 in the filter mechanism can be configured with a stepped surface at the bottom but no stepped surface at the top. The outer diameter of the elastic skirt 24 is made smaller than the inner diameter of the hollow sleeve 1. An annular limiting protrusion 51 is provided at the oil port of the oil tank body 5 to limit the elastic skirt 24. When the filter mechanism is separated from the oil tank body 5, the annular limiting protrusion 51 no longer limits the elastic skirt 24. Therefore, the elastic skirt 24 can be flipped away from the filter cylinder 21. Thus, cleaning is not required without a water outlet pipe. The iron filings on the adsorption element 3 can be quickly cleaned under gravity alone, achieving the purpose of ease of use.

[0065] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A filter mechanism for an injection molding machine oil tank, characterized in that, It includes a hollow sleeve (1), an interception assembly (2), and an adsorption component (3); The interception assembly (2) includes a filter cartridge (21), a fixed cartridge (22), a one-way valve (23), and an elastic skirt (24); The filter cylinder (21) is fixedly installed inside the hollow sleeve (1), and a first annular gap is formed between it and the inner wall of the hollow sleeve (1). The fixed cylinder (22) is fixedly installed on the filter cylinder (21), and a second annular gap is formed between the outer wall and the hollow sleeve (1); The top end of the fixed cylinder (22) extends to the outside of the hollow sleeve (1) and has a plurality of openings for setting the one-way valve (23); The one-way valve (23) can bulge in a direction away from the filter cartridge (21) to open the opening; The elastic skirt (24) is disposed on the outer wall of the fixed cylinder (22) and located below the one-way valve (23), and extends to abut against the top wall of the inner cavity of the hollow sleeve (1) to form a receiving cavity (4) around the first annular gap; The adsorption element (3) is disposed inside the hollow sleeve (1) and is used to adsorb iron filings in the receiving cavity (4).

2. The oil tank filtration mechanism for injection molding machines according to claim 1, characterized in that, The outer wall of the filter cylinder (21) is provided with a plurality of filter screens (211) arranged in a ring at equal intervals, and the plurality of filter screens (211) are arranged at an angle.

3. The injection molding machine oil tank filtration mechanism according to claim 1, characterized in that, The filter cartridge (21) is configured as a frustum-shaped structure, and its outer diameter increases from top to bottom.

4. The injection molding machine oil tank filtration mechanism according to claim 1, characterized in that, The top of the fixed cylinder (22) is configured as an arc-shaped structure.

5. The injection molding machine oil tank filtration mechanism according to claim 1, characterized in that, The adsorption element (3) is configured as an annular electromagnet and is located in the middle of the hollow sleeve (1). A controller (31) for controlling the annular electromagnet to be energized or de-energized is provided outside the hollow sleeve (1).

6. The oil tank filtration mechanism for injection molding machines according to claim 5, characterized in that, The middle part of the hollow sleeve (1) is made of PVC resin.

7. The injection molding machine oil tank filtration mechanism according to claim 5, characterized in that, The two ends of the hollow sleeve (1) are respectively set as flanges for connecting with external pipe fittings.

8. An injection molding machine oil tank assembly, characterized in that, It includes an oil tank body (5), a connecting pipe (6), and an injection molding machine oil tank filter mechanism as described in any one of claims 1-7; The two ends of the hollow sleeve (1) are respectively connected to the oil pipe of the oil tank body (5) and the connecting pipe (6), and the end of the fixed cylinder (22) away from the filter cylinder (21) is placed inside the oil pipe of the oil tank body (5).

9. The injection molding machine oil tank assembly according to claim 8, characterized in that, When hydraulic oil is output from the tank body (5) to the connecting pipe (6) by external force, the elastic skirt (24) separates from the top wall of the inner cavity of the hollow sleeve (1) and the one-way valve (23) remains stationary, so as to open the receiving cavity (4) and allow the hydraulic oil to pass through the second annular gap and the outer wall of the filter cylinder (21) in sequence to enter the connecting pipe (6).

10. The injection molding machine oil tank assembly according to claim 8, characterized in that, When hydraulic oil is supplied to the inside of the tank body (5) by the connecting pipe (6) under external force, the one-way valve (23) bulges up and the elastic skirt (24) abuts against the top wall of the inner cavity of the hollow sleeve (1) to open the opening and allow the hydraulic oil to enter the tank body (5) through the opening.

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