Closed mold locking oil return cover plate

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By designing the L-shaped oil return pipe, filter layer and connection device on the oil return cover of the injection molding machine, the problem of impurities in the return oil cannot be filtered and the connection is insufficient, and the efficient filtration and connection stability of the return oil is achieved and airtightness.

CN222431408UActive Publication Date: 2025-02-07FOSHAN JIUXING MASCH CO LTD

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Patent Information

Application Number: CN202421007390.0
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-05-10
Publication Date: 2025-02-07
Estimated Expiration: 2034-05-10

AI Technical Summary

Technical Problem

The oil return pipeline of the existing injection molding machine cannot effectively filter the impurities in the return oil, and the connection between the oil return pipeline and the return oil port is insufficient, resulting in oil leakage easily and affecting the use effect of the oil cylinder.

Method used

A closed mold-locking oil return cover plate is designed, including an L-shaped oil return pipe, a filter layer and a connecting device. The L-shaped return oil is filtered through the slit and filter layer. The connection device ensures the stable connection and sealing of the return oil and the return oil hose through the sleeve, threaded pipe and telescopic hose.

Benefits of technology

The impurities in the return oil are effectively filtered through the filter layer to improve the quality of the return oil; the connection stability and sealing of the return oil pipe and the return oil hose are improved through the connection device to prevent oil from leaking out and extend service life.

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Patent Text Reader

Abstract

The utility model discloses a closed mold locking oil return cover plate which comprises a cover plate body, an oil return opening is formed in the cover plate body, the cover plate body is connected with an oil return pipe through a connecting plate and a bolt, a containing groove is formed in the upper end of the oil return pipe, a filter layer is placed in the containing groove, an opening is formed in the side face of the containing groove, and the filter layer is arranged in the opening. The opening penetrates through the side face of the oil return pipe, the oil return pipe is hinged to the movable door through the opening, and the top face of the oil return pipe is connected with an oil return rubber pipe through a connecting device. The oil return rubber pipe and the oil return pipe are connected through the connecting device, the oil return rubber pipe is clamped through the matching of the sleeve and the threaded pipe, the stability and the leakproofness between the connecting device and the oil return rubber pipe are improved, and the stability and the leakproofness between the connecting device and the oil return pipe are improved through the matching of the sleeve and the telescopic hose. Return oil is filtered through the filter layer, and the filter screen is convenient to replace through the opening in the side face of the oil return pipe.

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Description

Technical Field

[0001] The utility model relates to the technical field of oil return cover plates, in particular to a closed mold locking oil return cover plate. Background Art

[0002] Injection molding machine is also called injection molding machine or injection machine. It is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. There are many types of injection molding machines. According to the driving mode, injection molding machines are divided into three types: hydraulic injection molding machines, all-electric injection molding machines and oil-electric composite injection molding machines. The most commonly used one is the hybrid injection molding machine.

[0003] Injection molding machines are generally composed of injection systems, clamping systems, hydraulic systems, electrical control systems, heating and cooling systems, lubrication systems, and safety detection systems. The clamping system mainly includes clamping devices, machine twisters, mold adjustment mechanisms, ejection mechanisms, front and rear fixed templates, mobile templates, clamping cylinders, and safety protection mechanisms. In actual use, the clamping cylinder will supply oil to power the clamping mechanism, and the excess oil will be transported back through the return oil pipeline. The general return oil pipeline directly transports the oil back, and the oil will have impurities in this process. The clamping cylinder has high requirements for the quality of the oil. If the oil contains impurities, it will affect the use of the cylinder. In addition, the general return oil pipeline is directly connected to the return oil port, and the connection effect is not good. The oil is easy to seep out from the interface and pollute the return oil pipeline. The tightness of the connection needs to be improved.

[0004] Therefore, we propose a closed mold locking oil return cover to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of the utility model is to provide a closed locking mold return oil cover to solve the problem mentioned in the above background technology that the return oil pipeline directly transports the oil back to the oil cylinder, the impurities in the oil cannot be filtered, and the connection between the return oil pipeline and the return oil port is not good, the oil is easy to seep out from the interface, and the airtightness of the connection needs to be improved.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a closed locking mold return oil cover plate, comprising a cover plate body, the cover plate body is provided with an oil return port, the cover plate body is connected to the oil return pipe through a connecting plate and bolts, a placement groove is provided at the upper end of the oil return pipe, a filter layer is placed in the placement groove, an opening is provided on the side of the placement groove, and the opening passes through the side of the oil return pipe, the oil return pipe is hinged to a movable door through the opening, and the top surface of the oil return pipe is connected to the oil return hose through a connecting device.

[0007] Preferably, the outer shape of the oil return pipe is L-shaped, and the upper end opening faces upward.

[0008] By adopting the above technical solution and through the L-shaped design, the oil can flow into the oil return pipe more quickly and smoothly.

[0009] Preferably, the filter layer includes a fixed plate and a filter screen, the fixed plate is placed in the oil return pipe through a placement groove, and the filter screen is installed on the fixed plate.

[0010] By adopting the above technical solution, the filter screen is placed in the oil return pipe through the fixing plate to filter the return oil.

[0011] Preferably, the filter screen is circular in shape, and the diameter of the filter screen is larger than the inner wall diameter of the oil return pipe.

[0012] By adopting the above technical solution, the diameter of the filter screen is larger than the inner wall diameter of the oil return pipe, thereby improving the filtering effect of the return oil.

[0013] Preferably, the connecting device includes a sleeve, a fixed rod, a rotating wheel, an arc-shaped slide groove, a threaded tube and a telescopic hose. The lower end of the sleeve is threadedly connected to the upper end of the oil return pipe, and the upper end of the sleeve is connected to the oil return hose. A plurality of fixed rods are arranged in the sleeve. The rotating wheel is movably connected to the arc-shaped slide groove through the arc-shaped slide groove. The inner wall of the rotating wheel is threadedly connected to the lower end of the threaded tube. The lower end of the threaded tube is fixedly connected to the upper end of the telescopic hose, and the lower end of the telescopic hose is connected to the upper end in the oil return pipe.

[0014] By adopting the above technical solution, the oil return pipe and the oil return hose are connected by a sleeve, which ensures the stability and airtightness of the connection between the oil return pipe and the oil return hose, and increases the airtightness of the connection between the connecting device and the oil return pipe by using a telescopic hose.

[0015] Preferably, the inner wall diameter of the casing is larger than the outer diameter of the oil return hose, the outer diameter of the threaded pipe is smaller than the inner wall diameter of the oil return hose, the lower end of the threaded pipe is provided with threads, the upper end of the threaded pipe is smoothly provided, and the upper end is provided with a cut angle, and the oil return hose is provided between the casing and the threaded pipe.

[0016] By adopting the above technical solution, the oil return hose is inserted into the upper end of the casing, and the oil return hose is clamped by the cooperation of the threaded tube and the casing to ensure that the oil return hose will not fall off, thereby improving the stability and airtightness of the connection.

[0017] Preferably, the number of the fixing rods is equal to the number of the arc-shaped sliding grooves.

[0018] By adopting the above technical solution, the rotating wheel rotates about the axis of the sleeve through the cooperation between the arc-shaped sliding groove and the fixed pipe.

[0019] Compared with the prior art, the beneficial effects of the utility model are: a closed locking oil return cover plate is connected to the oil return hose and the oil return pipe through a connecting device, the oil return hose is clamped by the cooperation of the sleeve and the threaded pipe, the stability and airtightness between the connecting device and the oil return hose are improved, the stability and airtightness between the connecting device and the oil return pipe are improved by the cooperation of the sleeve and the telescopic hose, the return oil is filtered through the filter layer, and the filter screen is conveniently replaced through the opening on the side of the oil return pipe.

[0020] 1. A rotating wheel and a threaded pipe are provided in the connecting device. The lower end of the threaded pipe is connected to the inner thread of the rotating wheel. The rotation of the rotating wheel drives the threaded pipe to move up and down. When the oil return hose is inserted into the upper end of the casing, the rotation drives the threaded pipe to move upward, so that the upper end of the threaded pipe is inserted into the oil return hose. The oil return hose is clamped by the cooperation of the threaded pipe and the hose, thereby improving the stability and airtightness of the connection.

[0021] 2. A sleeve and a telescopic hose are provided in the connecting device. The lower end of the sleeve is threadedly connected to the upper end of the oil return pipe, the lower end of the telescopic hose is connected to the upper end of the oil return pipe, the upper end of the telescopic hose is fixedly connected to the lower end of the threaded pipe, the movement of the threaded pipe drives the telescopic hose to expand and contract, and when the return oil flows in through the threaded pipe, the airtightness of the connection is improved through the telescopic hose to ensure that the oil does not leak out.

[0022] 3. A filter layer is set in the return oil pipe. When the return oil flows into the return oil pipe, it is filtered through the filter. After long-term use, impurities will accumulate on the filter. Open the movable door on the side of the return oil pipe, then take out the filter layer, replace and clean the filter, and then place the filter into the return oil pipe through the fixed plate to filter again. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 , is a front sectional structural schematic diagram of the utility model;

[0024] Figure 2 , is a schematic diagram of the top cross-sectional structure of the utility model;

[0025] Figure 3 , is a schematic diagram of the arc-shaped slideway and the fixing rod structure of the utility model;

[0026] Figure 4 、For the utility model Figure 1 Enlarged structural diagram at A in the middle.

[0027] In the figure: 1. cover plate body; 2. oil return port; 3. oil return pipe; 4. connecting plate; 5. bolt; 6. placement groove; 7. filter layer; 8. opening; 9. movable door; 10. connecting device; 11. oil return hose; 701. fixing plate; 702. filter screen; 1001. sleeve; 1002. fixing rod; 1003. rotating wheel; 1004. arc slide groove; 1005. threaded pipe; 1006. telescopic hose. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions 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. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-4 The utility model provides a technical solution: In order to solve the problem that the return oil pipeline mentioned in the above background technology cannot filter the return oil, the return oil contains impurities, which will affect the use effect of the oil cylinder, the following solution is disclosed, please refer to Figure 1-2 A closed locking oil return cover plate, comprising a cover plate body 1, an oil return port 2 is arranged on the cover plate body 1, the cover plate body 1 is connected to the oil return pipe 3 through a connecting plate 4 and a bolt 5, the outer shape of the oil return pipe 3 is L-shaped, and the upper end opening faces upward, a placement groove 6 is arranged on the upper end of the oil return pipe 3, a filter layer 7 is placed in the placement groove 6, an opening 8 is arranged on the side of the placement groove 6, and the opening 8 passes through the side of the oil return pipe 3, the oil return pipe 3 is hinged with a movable door 9 through the opening 8, the top surface of the oil return pipe 3 is connected to the oil return hose 11 through a connecting device 10, the filter layer 7 comprises a fixed plate 701 and a filter screen 702, a fixed The plate 701 is placed in the return oil pipe 3 through the placement groove 6, and a filter screen 702 is installed on the fixed plate 701. The filter screen 702 is circular in shape, and the diameter of the filter screen 702 is larger than the inner wall diameter of the return oil pipe 3. When the return oil passes through the return oil pipe 3, impurities in the return oil are filtered through the filter screen 702. Impurities will accumulate on the filter screen 702 after long-term use, affecting the use effect of the filter screen 702. Just open the movable door 9 and then take out the filter screen 702 through the fixed plate 701, then clean or replace the filter screen 702, and then place the filter screen 702 into the return oil pipe 3 through the fixed plate 701, and it can be used again. The structure is simple and the operation is convenient.

[0030] Furthermore, the return oil pipeline is usually directly connected to the return oil port, which has a poor connection effect. The return oil is easy to leak out from the interface and pollute the return oil pipeline. It is necessary to improve the tightness of the connection. For details, please refer to Figure 3-4The connecting device 10 includes a sleeve 1001, a fixed rod 1002, a rotating wheel 1003, an arc-shaped slide groove 1004, a threaded tube 1005 and a telescopic hose 1006. The lower end of the sleeve 1001 is threadedly connected to the upper end of the oil return pipe 3, and the upper end of the sleeve 1001 is connected to the oil return hose 11. A plurality of fixed rods 1002 are arranged in the sleeve 1001. The rotating wheel 1003 is connected to the arc-shaped slide groove 1004 through the arc-shaped slide groove 1004. The inner wall of the rotating wheel 1003 is threadedly connected to the lower end of the threaded tube 1005, the lower end of the threaded tube 1005 is fixedly connected to the upper end of the telescopic hose 1006, and the lower end of the telescopic hose 1006 is connected to the upper end of the return oil pipe 3. The inner wall diameter of the sleeve 1001 is larger than the outer diameter of the return oil hose 11, and the outer diameter of the threaded tube 1005 is smaller than the inner wall diameter of the return oil hose 11. The lower end of the threaded tube 1005 is provided with There are threads, and the upper end of the threaded tube 1005 is smoothly set and has a cut angle. The return oil hose 11 is set between the sleeve 1001 and the threaded tube 1005. The number of fixed rods 1002 is equal to the number of arc-shaped slide grooves 1004. The return oil hose 11 and the return oil hose 3 are connected through the connecting device 10. One end of the telescopic hose 1006 is connected to the threaded tube 1005, and the other end is connected to the return oil hose 3. Through the cooperation of the sleeve 1001 and the telescopic hose 1006, the stability and airtightness of the connection between the connecting mechanism 10 and the return oil hose 3 are improved. The return oil hose 11 is inserted into the upper end of the sleeve 1001, and the rotation of the wheel 1003 drives the threaded tube 1005 to move upward. Through the cooperation of the sleeve 1001 and the threaded tube 1005, the return oil hose 11 is clamped, and the stability and airtightness of the connection between the connecting device 10 and the return oil hose 11 are improved. The connecting device has a simple structure and is easy to install.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A closed mold locking oil return cover plate, comprising a cover plate body (1), the cover plate body (1) being provided with an oil return port (2), the cover plate body (1) being connected to an oil return pipe (3) via a connecting plate (4) and a bolt (5), the upper end of the oil return pipe (3) being provided with a placement groove (6), a filter layer (7) being placed in the placement groove (6), characterized in that: An opening (8) is provided on the side of the placement groove (6), and the opening (8) penetrates the side of the oil return pipe (3). The oil return pipe (3) is hinged to the movable door (9) through the opening (8), and the top surface of the oil return pipe (3) is connected to the oil return rubber hose (11) through a connecting device (10).

2. The closed mold locking oil return cover according to claim 1, characterized in that: The outer shape of the oil return pipe (3) is L-shaped, and the upper end opening faces upward.

3. The closed mold locking oil return cover according to claim 2 is characterized by: The filter layer (7) comprises a fixed plate (701) and a filter screen (702); the fixed plate (701) is placed in the oil return pipe (3) through a placement groove (6); and the filter screen (702) is installed on the fixed plate (701).

4. The closed mold locking oil return cover according to claim 3 is characterized by: The filter screen (702) is circular in shape, and the diameter of the filter screen (702) is greater than the inner wall diameter of the oil return pipe (3).

5. The closed mold locking oil return cover according to claim 1 is characterized in that: The connecting device (10) comprises a sleeve (1001), a fixing rod (1002), a rotating wheel (1003), an arc-shaped sliding groove (1004), a threaded tube (1005) and a telescopic hose (1006). The lower end of the sleeve (1001) is threadedly connected to the upper end of the oil return pipe (3), and the upper end of the sleeve (1001) is connected to the oil return hose (11). A plurality of fixing rods (1002) are arranged inside the sleeve (1001). The rotating wheel (1003) is movably connected to the arc-shaped sliding groove (1004) through the arc-shaped sliding groove (1004). The inner wall of the rotating wheel (1003) is threadedly connected to the lower end of the threaded tube (1005). The lower end of the threaded tube (1005) is fixedly connected to the upper end of the telescopic hose (1006), and the lower end of the telescopic hose (1006) is connected to the upper end inside the oil return pipe (3).

6. The closed mold locking oil return cover according to claim 5, characterized in that: The inner wall diameter of the sleeve (1001) is larger than the outer diameter of the oil return hose (11), the outer diameter of the threaded pipe (1005) is smaller than the inner wall diameter of the oil return hose (11), the lower end of the threaded pipe (1005) is provided with threads, the upper end of the threaded pipe (1005) is smoothly arranged and has a cut angle, and the oil return hose (11) is arranged between the sleeve (1001) and the threaded pipe (1005).

7. The closed mold locking oil return cover according to claim 5, characterized in that: The number of the fixing rods (1002) is equal to the number of the arc-shaped sliding grooves (1004).