CN110509493B

CN110509493B - Oil leakage prevention device of injection molding machine

Info

Publication number: CN110509493B
Application number: CN201910852627.2A
Authority: CN
Inventors: 张弛
Original assignee: Individual
Current assignee: Huizhou Huamei Precision Parts Co ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2021-10-29
Anticipated expiration: 2039-09-10
Also published as: CN110509493A

Abstract

The invention discloses an oil leakage prevention device of an injection molding machine, which comprises a machine body, a support shell arranged on the machine body, an injection hydraulic cylinder fixed on one side of the support shell, a movable piston and a piston rod arranged in the injection hydraulic cylinder, a screw spline arranged at the output end of the injection hydraulic cylinder, a rotating screw connected with one end of the screw spline, and a charging barrel sleeved on the rotating screw and fixed with the support shell, the side of the injection hydraulic cylinder close to the support shell is provided with a drainage device for preventing the hydraulic cylinder from leaking oil, the oil leakage prevention device of the injection molding machine plays a role of effectively preventing oil leakage between the connection part of the piston rod and the support shell, meanwhile, the dustproof effect on the contact part of the support shell and the piston rod further prevents granular or powdery plastic from entering the support shell, and the phenomenon that oil leakage occurs in the injection oil cylinder due to abrasion between the piston rod and a sealing element caused by contact of the granular or powdery plastic and the piston rod is avoided.

Description

Oil leakage prevention device of injection molding machine

Technical Field

The invention relates to the technical field of injection molding machines, in particular to an oil leakage prevention device of an injection molding machine.

Background

The injection molding machine is a processing machine with the largest use amount in the plastic processing industry, and not only a large number of products can be directly produced by the injection molding machine, but also key equipment for forming an injection stretch blow process is formed. An injection molding machine generally comprises a glue injection system, a mold closing system, a hydraulic transmission system, a heating and cooling system and the like. The most widely used injection molding machine at present is a screw injection molding machine, and the technological process is that granular or powdery plastic is firstly added into a machine barrel, and the plastic is made into a molten state through the rotation of a screw and the heating of the outer wall of the machine barrel; then the machine carries out die assembly and moves the glue injection seat forward, so that the nozzle is attached to a sprue channel of the die; then, pressure oil is introduced into the glue injection oil cylinder to drive the screw to advance, so that molten materials are injected into a closed die with lower temperature at a high pressure and a high speed, the molten materials are solidified and molded into plastic products after pressure maintaining and cooling, one of common fault phenomena in the operation process of the injection molding machine is leakage, pressure difference generated when liquid flows in a hydraulic element and a pipeline, gaps exist in the elements and the like are all causes of leakage, once a hydraulic system leaks, stable system pressure cannot be formed, and the production is influenced or even an estimated result cannot be generated.

At present, in the process of processing the existing hydraulic system of the injection molding machine, a hydraulic oil cylinder is used as a main execution element of the hydraulic system of the injection molding machine, and because the piston rod of the hydraulic oil cylinder is exposed outside in the working process, and is directly contacted with the external environment and small particles such as dust and the like generated in granular or powdery plastic, although a dustproof ring, a sealing element and the like are arranged on a guide sleeve, granular pollutants in the environment and impurities in the granular or powdery plastic are easily adhered to the piston rod, thereby accelerating the scratch and abrasion between the piston rod and the sealing element, and further causing the leakage of the hydraulic system of the injection molding machine. Therefore, an oil leakage prevention device for an injection molding machine is provided.

Disclosure of Invention

The invention aims to provide an oil leakage prevention device for an injection molding machine, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an oil leakage prevention device of an injection molding machine comprises a machine body, a supporting shell arranged on the machine body, an injection hydraulic cylinder fixed on one side of the supporting shell, a movable piston and a piston rod arranged in the injection hydraulic cylinder, a screw spline arranged at the output end of the injection hydraulic cylinder, a screw transmission gear sleeved on the screw spline, a gear box meshed with the screw transmission gear, a rotating screw rod connected with one end of the screw spline, and a charging barrel sleeved on the rotating screw rod and fixed with the supporting shell, wherein a drainage device for preventing the oil leakage of the hydraulic cylinder is arranged on one side of the injection hydraulic cylinder close to the supporting shell, a dustproof sealing device for preventing dust and dirt from entering is arranged at one end of the piston rod positioned in the supporting shell, the dustproof sealing device is arranged in the supporting shell, and a material guide device for blocking materials is arranged at one end of the outer part of the supporting shell corresponding to the rotating screw rod, and the output end of the material guide device is positioned in the charging barrel.

Preferably, the drainage device includes sealed shell, first seal ring, first drainage packing ring, second drainage packing ring and the piece that produces oil, the both sides of sealed shell are respectively through the outside fixed connection of two first seal rings and injection pneumatic cylinder and support housing, and sealed shell cup joints in the piston rod outside, the inside drainage groove that is equipped with of sealed shell, and drainage inslot portion is staggered arrangement respectively and has first drainage packing ring and second drainage packing ring, first drainage packing ring cup joints in the piston rod outside, the inside oil storage tank that is equipped with of sealed shell, and oil storage tank and drainage groove intercommunication, the oil storage tank bottom is equipped with the piece that produces oil.

Preferably, the first drainage gasket and the second drainage gasket are both in a circular truncated cone shape.

Preferably, the piece that produces oil includes internal thread cover, threaded rod and second seal ring, the inside bottom fixedly connected with internal thread cover of oil storage tank, and threaded rod and internal thread cover rotate and be connected, second seal ring cup joints in the threaded rod outside, and second seal ring fixed connection is inside the oil storage tank.

Preferably, dustproof sealing device includes set casing, first dust gasket and second dust gasket, set casing fixed connection is inside the support housing, and the set casing cup joints in the piston rod outside, the inside dust groove that is equipped with of set casing, and the equal fixed connection of first dust gasket and second dust gasket is inside the dust groove, first dust gasket and piston rod sliding connection, first dust gasket and the inside first draw-in groove and the second draw-in groove of being equipped with respectively of second dust gasket, and the first protruding joint on the first dust gasket is inside the second draw-in groove, the protruding joint of the inside second of second dust gasket is inside first draw-in groove.

Preferably, the position where the first dustproof gasket is connected with the piston rod is of a rounded structure.

Preferably, a plurality of buffer springs are arranged inside the second clamping groove and are in contact with the first protrusions on the first dustproof gasket.

Preferably, the guide device includes elasticity guide pad, elasticity chucking pad, strengthens shell and closing plate, elasticity guide pad slides and cup joints in the rotation screw rod outside, and elasticity guide pad outside contact connection elasticity chucking pad, and the elasticity chucking pad outside is equipped with and strengthens the shell, elasticity guide pad, elasticity chucking pad and the shell of strengthening all with closing plate fixed connection, the closing plate slides and cup joints in the rotation screw rod outside, the both sides of closing plate respectively with support casing and feed cylinder fixed connection.

Preferably, the elastic clamping pad and the reinforcing shell are both U-shaped.

Compared with the prior art, the invention has the beneficial effects that:

1. when the injection cylinder is used, the drainage device is arranged in the support shell corresponding to the piston rod, so that the oil leakage prevention effect between the connecting part of the piston rod and the support shell is effectively achieved, meanwhile, the support shell is arranged on the outer side of the piston rod, so that the effect of isolating suspended particle impurities in the environment is achieved, meanwhile, the dustproof sealing device is arranged in the piston rod and the support shell, so that the dustproof effect on the contact part of the support shell and the piston rod is achieved, meanwhile, the material guide device is arranged at the connecting part of the support shell and the rotating screw rod, so that the granular or powdery plastic is further prevented from entering the support shell, and the phenomenon that the oil leakage of the injection cylinder is caused by the fact that the granular or powdery plastic is in contact with the piston rod and is abraded between the piston rod and the sealing element is avoided.

2. The piston drainage device is simple in structure, and meanwhile, the first drainage gasket and the second drainage gasket are both in a circular truncated cone shape, so that the hydraulic oil attached to the piston can be effectively drained.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of area A of FIG. 1;

FIG. 3 is an enlarged view of the area B of FIG. 1 according to the present invention;

FIG. 4 is an enlarged view of area C of FIG. 2 according to the present invention;

fig. 5 is an enlarged view of the area D in fig. 2 according to the present invention.

In the figure: 1-a fuselage; 2-a support housing; 3-an injection hydraulic cylinder; 4-moving the piston; 5-a piston rod; 6-screw spline; 7-screw drive gear; 8-a gearbox; 9-rotating the screw; 10-a drainage device; 11-dust sealing means; 12-a material guiding device; 13-a barrel; 14-a sealed shell; 15-a first sealing gasket; 16-a first drainage gasket; 17-a second drainage gasket; 18-oil outlet member; 19-a drainage groove; 20-an oil storage tank; 21-an internal thread sleeve; 22-a threaded rod; 23-a second sealing gasket; 24-a stationary shell; 25-a first dust gasket; 26-a second dust gasket; 27-a dust-proof groove; 28-a first card slot; 29-a second card slot; 30-a first protrusion; 31-a second protrusion; 32-a buffer spring; 33-an elastomeric conductive pad; 34-an elastic clamping pad; 35-a reinforcement shell; 36-sealing plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: an oil leakage prevention device of an injection molding machine comprises a machine body 1, a supporting shell 2 arranged on the machine body 1, an injection hydraulic cylinder 3 fixed on one side of the supporting shell 2, a movable piston 4 and a piston rod 5 arranged in the injection hydraulic cylinder 3, a screw spline 6 arranged at the output end of the injection hydraulic cylinder 3, a screw transmission gear 7 sleeved on the screw spline 6, a gear box 8 meshed with the screw transmission gear 7, a rotating screw 9 connected with one end of the screw spline 6 and a charging barrel 13 sleeved on the rotating screw 9 and fixed with the supporting shell 2, wherein one side of the injection hydraulic cylinder 3 close to the supporting shell 2 is provided with a drainage device 10 for preventing the hydraulic cylinder from oil leakage, one end of the piston rod 5 positioned in the supporting shell 2 is provided with a dustproof sealing device 11 for preventing dust and dirt from entering, and the dustproof sealing device 11 is arranged in the supporting shell 2, and one end of the outside of the supporting shell 2 corresponding to the rotating screw 9 is provided with a material guide device 12 for blocking materials, and the output end of the material guide device 12 is positioned inside the charging barrel 13.

Drainage device 10 is including sealed shell 14, first seal ring 15, first drainage packing ring 16, second drainage packing ring 17 and play oil 18, sealed shell 14's both sides are respectively through two first seal ring 15 and injection hydraulic cylinder 3 and support housing 2's outside fixed connection, and sealed shell 14 cup joints in the piston rod 5 outside, sealed shell 14 is inside to be equipped with drainage groove 19, and drainage groove 19 is inside to be the crisscross arrangement respectively and has first drainage packing ring 16 and second drainage packing ring 17, first drainage packing ring 16 cup joints in the piston rod 5 outside, sealed shell 14 is inside to be equipped with oil storage tank 20, and oil storage tank 20 and drainage groove 19 intercommunication, oil storage tank 20 bottom is equipped with out oil 18, through the drainage device 10 that is equipped with to prevent the phenomenon of oil leak from appearing in the piston rod 5 outside.

The first drainage gasket 16 and the second drainage gasket 17 are both in a circular truncated cone shape, so that the function of guiding the hydraulic oil outside the piston rod 5 is achieved.

The piece 18 that produces oil includes internal thread cover 21, threaded rod 22 and second seal ring 23, the inside bottom fixedly connected with internal thread cover 21 of oil storage tank 20, and threaded rod 22 and internal thread cover 21 rotate and be connected, second seal ring 23 cup joints in the threaded rod 22 outside, and second seal ring 23 fixed connection is inside the oil storage tank 20 to play the effect that carries out the drainage to the hydraulic oil in the oil storage tank 20.

The specific implementation mode is as follows: when processing granule or likepowder plastics, carry out oiling and the play oil in to injection hydraulic cylinder 3, thereby make the movable piston 4 promote piston rod 5 and reciprocate moving in the inside memorability circulation of injection hydraulic cylinder 3, at the certain in-process of piston rod 5, first drainage packing ring 16 and piston rod 5 contact, make remaining hydraulic oil on the piston rod 5 pour into the drainage groove 19 inside that forms between first drainage packing ring 16 and the second drainage packing ring 17 into by first drainage packing ring 16, hydraulic oil receives under the effect of self gravity simultaneously, move to the bottom of drainage groove 19, after piston rod 5 moved a period, through rotating threaded rod 22, make threaded rod 22 break away from the oil storage tank 20 inside, can realize carrying out quick exhaust effect to the inside hydraulic oil that accumulates of drainage groove 19.

Dustproof sealing device 11 includes set casing 24, first dust washer 25 and

second dust washer

26, 24 fixed connection of set casing is inside support housing 2, and set casing 24 cup joints in the piston rod 5 outside, the inside dust groove 27 that is equipped with of set casing 24, and the equal fixed connection of first dust washer 25 and second dust washer 26 is inside dust groove 27, first dust washer 25 and piston rod 5 sliding connection, first dust washer 25 is equipped with first draw-in groove 28 and second draw-in groove 29 respectively with second dust washer 26 is inside, and the first protruding 30 joint on the first dust washer 25 is inside second draw-in groove 29, the protruding 31 joint of the inside second of second dust washer 26 is inside first draw-in groove 28, through the dustproof sealing device 11 that is equipped with to play the dirt-proof effect to piston rod 5 removal in-process.

The specific implementation mode is as follows: when the piston rod 5 does the cyclic reciprocating motion in the supporting shell 2, the first dustproof gasket 25 is in close contact with the piston rod 5, granular or powdery plastic impurities on the outer side of the piston rod 5 are removed in the contact process, and meanwhile, under the contact action of the second dustproof gasket 26, the first dustproof gasket 25 is more stable in contact with the piston rod 5, and meanwhile, the first dustproof gasket 25 can do extrusion motion relative to the second dustproof gasket 26, so that the phenomenon of abrasion when the first dustproof gasket 25 is in contact with the piston rod 5 is effectively reduced.

The first dustproof gasket 25 is connected with the piston rod 5 at a fillet structure, so that granular or powdery plastic on the piston rod 5 can be quickly separated.

The inside a plurality of buffer spring 32 that is equipped with of second draw-in groove 29, and a plurality of buffer spring 32 and the first arch 30 contact on the first dustproof packing ring 25, through a plurality of buffer spring 32 that is equipped with to improve the elastic force that first dustproof packing ring 25 and second dustproof packing ring 26 contacted.

The material guiding device 12 comprises an elastic material guiding pad 33, an elastic clamping pad 34, a reinforcing shell 35 and a sealing plate 36, the elastic material guiding pad 33 is sleeved on the outer side of the rotating screw rod 9 in a sliding mode, the elastic clamping pad 34 is connected to the outer side of the elastic material guiding pad 33 in a contact mode, the reinforcing shell 35 is arranged on the outer side of the elastic clamping pad 34, the elastic material guiding pad 33, the elastic clamping pad 34 and the reinforcing shell 35 are fixedly connected with the sealing plate 36, the sealing plate 36 is sleeved on the outer side of the rotating screw rod 9 in a sliding mode, two sides of the sealing plate 36 are fixedly connected with the supporting shell 2 and the charging barrel 13 respectively, and the material guiding device 12 is arranged to play a role in separating granular or powdery plastics on the outer side of the rotating screw rod 9.

The specific implementation mode is as follows: when rotating screw 9 and rotating and moving for supporting casing 2, elasticity guide pad 33 and the contact of rotating the screw 9 outside, simultaneously when elasticity guide pad 33 contact material and extrusion deformation, elasticity chucking pad 34 provides elasticity guide pad 33 resilience force, simultaneously under the supporting action of reinforcement shell 35, the intensity of elasticity guide has been strengthened to make the graininess or the powdered plastics that rotate screw 9 break away from and get into the inside rotation screw 9 outside of supporting casing 2, and then prevent graininess or powdered plastics and piston rod 5 contact.

The elastic clamping pad 34 and the reinforcing shell 35 are both U-shaped, so that the elastic material guiding pad 33 can be used for reinforcing material guiding.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an injection molding machine leak protection oil device, including fuselage (1), support casing (2) of setting on fuselage (1), fix injection hydraulic cylinder (3) in one side of support casing (2), set up at inside removal piston (4) and piston rod (5) of injection hydraulic cylinder (3), screw rod spline (6) of setting at injection hydraulic cylinder (3) output, cup joint screw rod drive gear (7) on screw rod spline (6), gear box (8) of being connected with screw rod drive gear (7) meshing, rotation screw rod (9) and the cover of being connected with screw rod spline (6) one end rotate screw rod (9) and with support casing (2) fixed feed cylinder (13), its characterized in that: one side, close to the support shell (2), of the injection hydraulic cylinder (3) is provided with a drainage device (10) for preventing the hydraulic cylinder from leaking oil, one end, located inside the support shell (2), of the piston rod (5) is provided with a dustproof sealing device (11) for preventing dust and dirt from entering, the dustproof sealing device (11) is arranged inside the support shell (2), one end, corresponding to the rotating screw (9), of the outside of the support shell (2) is provided with a material guide device (12) for blocking materials, and the output end of the material guide device (12) is located inside the material barrel (13);

the drainage device (10) comprises a sealing shell (14), a first sealing washer (15), a first drainage washer (16), a second drainage washer (17) and an oil outlet piece (18), two sides of the sealing shell (14) are respectively fixedly connected with the injection hydraulic cylinder (3) and the outer side of the supporting shell (2) through two first sealing gaskets (15), and the sealing shell (14) is sleeved outside the piston rod (5), a drainage groove (19) is arranged in the sealing shell (14), and the inside of the drainage groove (19) is respectively provided with a first drainage gasket (16) and a second drainage gasket (17) in staggered arrangement, the first drainage gasket (16) is sleeved outside the piston rod (5), an oil storage tank (20) is arranged inside the sealing shell (14), the oil storage tank (20) is communicated with the drainage tank (19), and the bottom end of the oil storage tank (20) is provided with an oil outlet piece (18);

the first drainage washer (16) and the second drainage washer (17) are both in a circular truncated cone shape;

the oil outlet piece (18) comprises an internal thread sleeve (21), a threaded rod (22) and a second sealing washer (23), the internal thread sleeve (21) is fixedly connected to the bottom end inside the oil storage tank (20), the threaded rod (22) is rotatably connected with the internal thread sleeve (21), the second sealing washer (23) is sleeved on the outer side of the threaded rod (22), and the second sealing washer (23) is fixedly connected inside the oil storage tank (20);

the material guide device (12) comprises an elastic guide pad (33), an elastic clamping pad (34), a reinforcing shell (35) and a sealing plate (36), the elastic guide pad (33) is sleeved on the outer side of the rotating screw rod (9) in a sliding mode, the elastic clamping pad (34) is connected to the outer side of the elastic guide pad (33) in a contact mode, the reinforcing shell (35) is arranged on the outer side of the elastic clamping pad (34), the elastic guide pad (33), the elastic clamping pad (34) and the reinforcing shell (35) are fixedly connected with the sealing plate (36), the sealing plate (36) is sleeved on the outer side of the rotating screw rod (9) in a sliding mode, and two sides of the sealing plate (36) are fixedly connected with the supporting shell (2) and the charging barrel (13) respectively.

2. The oil leakage preventing device of the injection molding machine according to claim 1, characterized in that: the dustproof sealing device (11) comprises a fixed shell (24), a first dustproof gasket (25) and a second dustproof gasket (26), the fixed shell (24) is fixedly connected inside the supporting shell (2), and the fixed shell (24) is sleeved outside the piston rod (5), a dustproof groove (27) is arranged inside the fixed shell (24), and the first dustproof gasket (25) and the second dustproof gasket (26) are both fixedly connected inside the dustproof groove (27), the first dustproof gasket (25) is connected with the piston rod (5) in a sliding manner, a first clamping groove (28) and a second clamping groove (29) are respectively arranged in the first dustproof gasket (25) and the second dustproof gasket (26), and the first bulge (30) on the first dustproof gasket (25) is clamped in the second clamping groove (29), and a second bulge (31) in the second dustproof gasket (26) is clamped in the first clamping groove (28).

3. The oil leakage preventing device of the injection molding machine according to claim 2, characterized in that: the position where the first dustproof gasket (25) is connected with the piston rod (5) is of a fillet structure.

4. The oil leakage preventing device of the injection molding machine according to claim 2, characterized in that: a plurality of buffer springs (32) are arranged inside the second clamping groove (29), and the buffer springs (32) are in contact with the first protrusions (30) on the first dustproof gasket (25).

5. The oil leakage preventing device of the injection molding machine according to claim 1, characterized in that: the elastic clamping pad (34) and the reinforcing shell (35) are both U-shaped.