CN102852904A - Buffer oil cylinder for plastic product forming machinery - Google Patents
Buffer oil cylinder for plastic product forming machinery Download PDFInfo
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- CN102852904A CN102852904A CN2012103338025A CN201210333802A CN102852904A CN 102852904 A CN102852904 A CN 102852904A CN 2012103338025 A CN2012103338025 A CN 2012103338025A CN 201210333802 A CN201210333802 A CN 201210333802A CN 102852904 A CN102852904 A CN 102852904A
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Abstract
The invention relates to a buffer oil cylinder for plastic product forming machinery and belongs to the technical field of power sources of plastic product forming machinery. The buffer oil cylinder comprises an oil cylinder body and an oil cylinder column, wherein the oil cylinder body with an oil cylinder head at one end and a tail seat at the other end is provided with an oil cylinder head buffer oil cavity and an oil inlet and outlet hole, and the oil cylinder column is arranged in an oil cavity of the oil cylinder body. The tail seat is provided with a tail seat oil inlet and outlet hole, an oil cylinder column piston head is additionally arranged at one end of the oil cylinder column towards the tail seat, and a piston head sealing ring is arranged on the oil cylinder column piston head. The buffer oil cylinder for plastic product forming machinery is characterized in that a buffer column is formed on the surface of the oil cylinder piston head, the oil cylinder head is provided with an oil outlet hole and an oil return hole , a pressure oil flow adjusting mechanism is arranged on the outer wall of the oil cylinder head and communicated with the oil outlet hole and the oil return hole at the same time and controls flow of pressure oil entering the oil return hole from the oil outlet hole. Accordingly, the oil cylinder head is protected from being collided by the oil cylinder column piston head, no damage to the oil cylinder body is caused, and the buffer oil cylinder is simple in structure, easy to manufacture and mount.
Description
Technical field
The invention belongs to the power source technical field of plastic molding machine, be specifically related to the cushion cylinder that a kind of plastic molding machine is used
Background technique
The oil cylinder that plastic molding machine is used can be seen in the ZL01244534.7(moving-mold mechanism by being not limited to the following patent that exemplifies); the folding mould oil cylinder of ZL01244535.5(architecture advances); the matched mould locking mechanism of ZL200420027711.X(plastic hollow formation machine); the matched mould locking mechanism of ZL200920035666.5(hollow plastic molding press); ZL201020157649.1(opens; closing mould mechanism); the magnetic mold closing oil cylinder of ZL201020157674.X(hollow plastic product molding machine) and ZL201120312034.6(embrace elbow formula clasp mould mechanism) etc.And plastic product molding machine such as injection machine and blow-moulding machine, etc.
Generally, in order to improve the manufacturing efficient of plastic article, often require the movement speed of oil cylinder to adapt with it, still, the oil cylinder post movement velocity of oil cylinder is faster, and then the inertia impact of oil cylinder is also larger, even the cylinder phenomenon occurs hitting.When particularly and quality large when the mould on the mould bases that the front end with the oil cylinder post is connected was heavy, inertia impact was larger.Take the folding mould oil cylinder (ZL01244535.5) of aforesaid moving-mold mechanism (ZL01244534.7) and architecture advances as example; imitate fruit if obtain fast shifting formwork, folding; depend on so undoubtedly the quick degree of cylinder action, otherwise can't reach the purpose of high efficiency production plastic article.If yet can not effectively solve the buffer problem of the oil cylinder post of oil cylinder, can't ensure the working life of oil cylinder so.Therefore the buffer problem of oil cylinder suffers from industry for a long time, and expectation solves.
The applicant has carried out literature search, searches following two pieces of representational patent documentations: the one, and " cushioning device for oil cylinder " that utility model patent notice of authorization CN201125902Y recommends; The 2nd, " a kind of cylinder buffering device of hydraulic plunger cylinder " that application for a patent for invention publication number CN1854535A provides.
Above-mentioned CN2011259025Y is that the oil cylinder cavity wall at oil cylinder arranges a projection, and should projection corresponding to the position of the oil inlet and oil return mouth of oil cylinder, when piston (patent claims plunger) when going downwards to raised position, gap smaller between piston and the oil cylinder, and when piston continues to descend, the oil inlet and oil return mouth is closed, the oil return resistance is increased gradually, the rate of descent of piston is slack-off gradually.When descent of piston near oil cylinder when bottom, because of the oil inlet and oil return mouth by complete closed, piston (descending) speed that descends goes to zero, thereby can avoid piston end and oil cylinder to bump against (specifically referring to last two sections of the Instructions Page 2 of this patent).
Above-mentioned CN1854535A arranges a bumper post in the bottom, cylinder chamber of oil cylinder, and offer one at piston (patent claims plunger) towards an end of bumper post and hold the buffering oil pocket join with bumper post, when descent of piston, bumper post enters the buffering oil pocket, the pressure oil of buffering in the oil pocket overflows from bumper post and the matching gap of buffering oil pocket, until draw (specifically can referring to the 4th page of last section of specification of this patent) by the oil inlet and oil return mouth.
Above-mentioned two patent schemes all have the good buffer function of plunger (custom claims the oil cylinder post), although structure is different, have objectively brought into play the effect that plays the same tune on different musical instruments.Yet there is following logical fraud in these two patent schemes: the one, owing to can't buffer level rationally be regulated, therefore poor for applicability, because as plastic molding machine, difference along with shape, size and even the purposes of plastic article, corresponding mould is also different, so behind mold exchange more, be after mould changes, if cushion effect remains unchanged, so the buffer function of plunger is difficult to performance.Reason is very simple, and mould is large, and quality is heavy, and its inertia is relatively large, and in buffering course, the oil pump capacity of plunger end is answered corresponding increase, otherwise with example; The 2nd, because plunger easily damages, therefore affect the working life of oil cylinder, take CN201125902Y as example, plunger in the process of upper and lower motion can and projection between produce friction, easily make plunger and/or projection cause damage, lose due buffer function, take CN1854535A as example, there is the anxiety of friction in the chamber wall of bumper post and buffering oil pocket; The 3rd, because the structure relative complex for example all needs oil cylinder inside is improved, therefore make comparatively loaded down with trivial details.
In view of above-mentioned prior art, the applicant has done long-term and useful exploration, finally finds a way to resolve the problem, and technological scheme described below produces under this background
Summary of the invention
Task of the present invention is to provide a kind of helping that the buffer level of oil cylinder post is implemented to regulate and used the flexibility that embodies in the using process, is conducive to avoid the oil cylinder post to produce friction and uses the protection oil cylinder and be of value to simplified structure and use and ensure and make and cushion cylinder that plastic molding machine easy to assembly is used.
Task of the present invention is finished like this, the cushion cylinder that a kind of plastic molding machine is used, comprise an end to have the oil cylinder head and the other end has the cylinder block of tailstock and be arranged on oil cylinder post in the oil pocket of cylinder block, the oil cylinder head has oil cylinder head buffering oil pocket, and be provided with a turnover oilhole at the oil cylinder head, tailstock is provided with tailstock turnover oilhole, wherein: the oil cylinder post is provided with a diameter greater than the oil cylinder column piston head of oil cylinder column diameter towards the expansion of an end end of tailstock, be provided be used to making that oil cylinder column piston head cooperates with the inner wall sealing of oil pocket and oil pocket being divided into the piston head seal ring of front chamber and rear chamber at oil cylinder column piston head, oil cylinder head buffering oil pocket communicates with described ante-chamber seat, and described tailstock turnover oilhole communicates with rear chamber, be characterised in that: described oil cylinder column piston head towards the surface of described oil cylinder head buffering oil pocket one side and the middle position that occupy the surface of this side consist of a bumper post arranged, this bumper post is corresponding with described oil cylinder head buffering oil pocket, when described oil cylinder post stretches outside described oil pocket, bumper post enters oil cylinder head buffering oil pocket, and when the oil cylinder post bounces back in the oil pocket, bumper post withdraws from oil cylinder head buffering oil pocket, on described oil cylinder head and the same side that is positioned at the oil cylinder head offer an oil outlet and a spill port, oil outlet communicates with described front chamber, and spill port communicates with described oil cylinder head buffering oil pocket, on the outer wall of oil cylinder head and in the position corresponding to oil outlet and spill port, be provided with a pressure oil flow control device that is used for oil outlet and spill port are formed each other oil return line, this pressure oil flow control device communicates with oil outlet and spill port simultaneously, by this pressure oil flow control device the pressure oil uninterrupted that oil outlet enters spill port is controlled.
In a specific embodiment of the present invention, the diameter of described bumper post shrinks gradually towards the direction of described oil cylinder head from described oil cylinder column piston head and constitutes the shape of circular cone stage body.
In another specific embodiment of the present invention, described pressure oil flow control device comprises valve body and valve rod, valve body and described oil cylinder head are fixed, and simultaneously corresponding to described oil outlet and spill port, offer one first oil duct and one second oil duct at this valve body, one end of the first oil duct communicates with described oil outlet, the other end communicates with an end of the second oil duct, and the other end of the second oil duct communicates with described spill port, valve rod is provided on the valve body with screw thread, one end of this valve rod is being insinuated into behind the first oil duct in the second oil duct, and consisting of in the end of this described end of this valve rod has one to be used for control first, the valve of the gap length between the second oil duct, and the valve rod the other end is stretched over outside the valve body and be fixed with an adjusting handle.
In another specific embodiment of the present invention, on the described oil cylinder head and be embedded with the first seal ring corresponding to the position between described oil outlet and described the first oil duct; And on the oil cylinder head and be embedded with one second seal ring corresponding to the position between described spill port and described the second oil duct.
When technological scheme provided by the invention is stretched out outside the oil pocket of cylinder block when the oil cylinder post, pressure oil in the front chamber releases from oil cylinder head turnover oilhole fast through oil cylinder head buffering oil pocket, when bumper post enters oil cylinder head buffering oil pocket, with the carrier frequency channel break between front chamber and the oil cylinder head buffering oil pocket, pressure oil in the front chamber enters the pressure oil flow control device with the state of large pressure small flow through oil outlet, enter oil cylinder head buffering oil pocket through the pressure oil flow control device by spill port, released by oil cylinder head turnover oilhole, thereby reach the buffer function to the oil cylinder post, the phenomenon that the oil cylinder head is hit in the butt of oil cylinder column piston can not occur; In the process of oil cylinder post motion, bumper post do not exist and cylinder block between friction phenomenon, can not undermine cylinder block; Simple in structure and be easy to make and install.
Description of drawings
Fig. 1 is the embodiments of the invention structural drawing.
Fig. 2 is application examples schematic diagram of the present invention.
Embodiment
For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present invention and beneficial effect more, the claimant general elaborates in embodiment's mode below, but all be not restriction to the present invention program to embodiment's description, any according to the present invention's design done only for pro forma but not substantial equivalent transformation all should be considered as technological scheme category of the present invention.
Embodiment:
Please be referring to Fig. 1 and Fig. 2, provided have oil cylinder head 11 and tailstock 12(Fig. 2 shows) cylinder block 1, cylinder block 1 is fixed between oil cylinder head 11 and the tailstock 12 by one group of fixing rod.The cylinder chamber of cylinder block 1 constitutes oil pocket 13, and these oil pocket 13 interior settings move up and down the oil cylinder post 2 of (take the shown position state as example).
Aforesaid oil cylinder head 11 consists of oil cylinder head buffering oil pocket 111, and the sidepiece at oil cylinder head 11 offers oil cylinder head turnover oilhole 112, oil cylinder head turnover oilhole 112 passes in and out oily joint and is connected with oil pump or similar hydraulic oil device by the road for setting the oily joint (not shown) of turnover.Be provided with the diameter oil cylinder column piston head 21 larger than the diameter of oil cylinder post 2 at aforesaid oil cylinder post 2 towards the expansion of an end end of tailstock 12, wall body at oil cylinder column piston head 21 is provided with one group of piston head seal ring 211, make oil cylinder column piston head 21 and the inwall of oil pocket 13 form sealing by this group of piston head seal ring 211, and cooperate oil cylinder column piston head 21 and make aforesaid oil pocket 13 be separated into front chamber 131 and rear chamber 132 by piston head seal ring 211, front chamber 131 communicates with aforesaid oil cylinder head buffering oil pocket 111, and rear chamber 132 passes in and out oilhole 121 with tailstock on the tailstock 12 and communicates.More particularly, aforesaid oil cylinder head turnover oilhole 112 communicates with oil cylinder head buffering oil pocket 111, and oil cylinder head buffering oil pocket 111 communicates with front chamber 131.
Please continue to see Fig. 1, technological points as technological scheme provided by the invention, aforesaid oil cylinder column piston head 21 towards the surface of a side of oil cylinder head buffering oil pocket 111 and the middle position that occupy this side surface consist of a bumper post 212 arranged, particularly, bumper post 212 and oil cylinder column piston head 21 integral productions, equally, oil cylinder column piston head 21 is integrally formed with oil cylinder post 2.Shown in figure, bumper post 212 is corresponding with oil cylinder head buffering oil pocket 111, in the present embodiment, towards the gradually narrow contracting and constitute the shape of circular cone of the direction of oil cylinder head 11, the shape of oil cylinder head buffering oil pocket 111 adapts with it the diameter of bumper post 212 from oil cylinder column piston head 21.When oil cylinder post 2 during to oil pocket 13 outer stretching, extension, namely towards the direction of oil cylinder head buffering oil pocket 111 during to outer displacement, then bumper post 212 enters oil cylinder head buffering oil pocket 111, otherwise, when oil cylinder post 2 during to the oil pocket 13 interior retraction of cylinder block 1, during namely towards the direction displacement of rear chamber 132, bumper post 212 withdraws from oil cylinder head buffering oil pocket 111.On aforesaid oil cylinder head 11 and the same side that is positioned at oil cylinder head 11 offer respectively an oil outlet 113 and a spill port 114, oil outlet 113 communicates with front chamber 131, spill port 114 then communicates with oil cylinder head buffering oil pocket 111.
For use, conducting and realize the adjusting control of pressure oil flow between the spill port 113,114, therefore on the outer wall of oil cylinder head 11 and corresponding to go out, spill port 113,114 position be fixed with a pressure oil flow control device 3, this pressure oil flow control device 3 both communicated with oil outlet 113, communicate with spill port 114 again, the uninterrupted that enters the pressure oil of spill port 114 by 3 pairs of oil outlets 113 of pressure oil flow control device is implemented to regulate.
Please emphasis referring to Fig. 1, pressure oil flow control device 3 preferably but not the structure that definitely is limited to is as follows: comprise a valve body 31 and a valve rod 32, valve body 31 usefulness screws and oil cylinder head 11 are fixing, and simultaneously corresponding to aforesaidly go out, spill port 113,114 positions.Offer one first oil duct 311 and one second oil duct 312 at valve body 31, one end of the first oil duct 311 and oil outlet 113 are corresponding and communicate, the other end of the first oil duct 311 communicates with an end of the second oil duct 312, and the other end of the second oil duct 312 and aforesaid spill port 114 are corresponding and communicate.Valve rod 32 is provided on the valve body 31 in the mode of screw-thread fit, one end of this valve rod 32 is that the left end of shown position is leaning out behind the first oil duct 311 in the second oil duct 312, particularly be insinuated into first, second oil duct 311,312 position, boundary, and consisting of has a valve 321 for the gap length between first, second oil duct 311,312 of control, and the other end of valve rod 32 is that the right-hand member of shown position state is stretched over valve body 31 outward and is fixed with an adjusting handle 322.
Preferably, on the oil cylinder head 11 and be embedded with one first seal ring 14 corresponding to the position between oil outlet 113 and the first oil duct 311, and on the oil cylinder head 11 and be embedded with one second seal ring 15 corresponding to the position between spill port 114 and the second oil duct 312.Play by first, second seal ring 14,15 and to prevent that pressure oil from oozing out from the matching gap between valve body 31 and the oil cylinder head 11.
When oil cylinder post 2 moves towards the direction of oil cylinder head 11, when to be oil cylinder post 2 stretched out in the oil pocket 13 of cylinder block 1, the pressure oils in the front chamber 131 of oil pocket 13 entered fast the oil cylinder head buffering oil pocket 111 of oil cylinder head 11 and are drawn by oil cylinder head turnover oilhole 112.In this process, when bumper post 212 enters oil cylinder head buffering oil pocket 111 when interior, then by bumper post 212 path between front chamber 131 and the oil cylinder head buffering oil pocket 111 is blocked, at this moment, pressure oil in the front chamber 131 can only be with small flow but the mode of large pressure or the title state enters valve body 31 from oil outlet 113 the first oil duct 311, the pressure oil that enters in the first oil duct 311 enters spill port 114 through the second oil duct 312, introduce oil cylinder head buffering oil pocket 111 by spill port 114, and then draw (releasing) by oil cylinder head turnover oilhole 112, thereby embody the buffer function to oil cylinder post 2.Hydraulic oil between first, second oil duct 311,312 is that the uninterrupted of pressure oil is realized by the adjusting to adjusting handle 322, specifically, operate clockwise or counterclockwise adjusting handle 322, the increase of controllable flow rate or reduce is in order to adapt to buffering to the inertia impact that varies in size.When for example and quality large when the mould of plastic product molding machine is heavy, then transfer the path clearance between first, second oil duct 311,312 relatively more greatly, otherwise with example.
Application examples:
Please see Fig. 2 by emphasis, in Fig. 2, illustrated with structure shown in Figure 1 to be that structure of the present invention is installed on the frame 4 of plastic molding machine, and be connected with the inflation builder 5 of plastic product molding machine at the front end of oil cylinder post 2, in the time will making 5 downward (with the location status shown in Figure 2) displacement of inflation builder, so that 5 pairs of inflation builders are positioned at material (plastics) air blowing of the mould on the mold mechanism (not shown) of its below, oil cylinder post 2 stretches out cylinder block 1 so, take the location status of Fig. 1 and Fig. 2 as example, oil cylinder post 2 stretches downwards.In this process, pressure oil in the front chamber 131 releases through oil cylinder head turnover oilhole 112 from oil cylinder head buffering oil pocket 111 fast, and enter oil cylinder head buffering oil pocket 111 when interior when bumper post 212, because the passage between front chamber 131 and the oil cylinder head buffering oil pocket 111 is cushioned post 212 blocking-up, pressure oil in the front chamber 131 enters oil outlet 113 with large pressure small flow, again successively through first, the second oil duct 311,312 enter oil cylinder head buffering oil pocket 111, and then released by oil cylinder head turnover oilhole 112, to play the effective buffer function to oil cylinder post 2, guarantee that finally inflation builder 5 is without impacting.
Technological scheme provided by the invention also can be used for other similar all need and uses on the equipment of oil cylinder except the plastic product molding machine that can be applied to any structural type
Claims (4)
1.
The cushion cylinder that a kind of plastic molding machine is used, comprise an end to have oil cylinder head (11) and the other end has the cylinder block (1) of tailstock (12) and be arranged on oil cylinder post (2) in the oil pocket (13) of cylinder block (1), oil cylinder head (11) has oil cylinder head buffering oil pocket (111), and be provided with a turnover oilhole (112) at oil cylinder head (11), tailstock (12) is provided with tailstock turnover oilhole (121), wherein: oil cylinder post (2) is provided with a diameter greater than the oil cylinder column piston head (21) of oil cylinder post (2) diameter towards the expansion of an end end of tailstock (12), be provided with the piston head seal ring (211) that cooperates be used to the inner wall sealing that makes oil cylinder column piston head (21) with oil pocket (13) and oil pocket (13) is divided into front chamber (131) and rear chamber (132) at oil cylinder column piston head (21), oil cylinder head buffering oil pocket (111) communicates with described ante-chamber seat (131), and described tailstock turnover oilhole (121) communicates with rear chamber (132), it is characterized in that: described oil cylinder column piston head (21) towards the surface of described oil cylinder head buffering oil pocket (111) one sides and the middle position that occupy the surface of this side consist of a bumper post (212) arranged, this bumper post (212) is corresponding with described oil cylinder head buffering oil pocket (111), when described oil cylinder post (2) stretches outside described oil pocket (13), bumper post (212) enters oil cylinder head buffering oil pocket (111), and when oil cylinder post (2) in the oil pocket (13) during retraction, bumper post (212) withdraws from oil cylinder head buffering oil pocket (111), and the same side that be positioned at oil cylinder head (11) upper at described oil cylinder head (11) offers an oil outlet (113) and a spill port (114), oil outlet (113) communicates with described front chamber (131), and spill port (114) communicates with described oil cylinder head buffering oil pocket (111), on the outer wall of oil cylinder head (11) and in the position corresponding to oil outlet (113) and spill port (114), be provided with one for the pressure oil flow control device (3) that oil outlet (113) and spill port (114) is formed each other oil return line, this pressure oil flow control device (3) communicates with oil outlet (113) and spill port (114) simultaneously, by this pressure oil flow control device (3) the pressure oil uninterrupted that oil outlet (113) enters spill port (114) is controlled.
2.
The cushion cylinder that plastic molding machine according to claim 1 is used, the diameter that it is characterized in that described bumper post (212) shrinks gradually towards the direction of described oil cylinder head (11) from described oil cylinder column piston head (21) and constitutes the shape of circular cone stage body.
3.
The cushion cylinder that plastic molding machine according to claim 1 is used, it is characterized in that described pressure oil flow control device (3) comprises valve body (31) and valve rod (32), valve body (31) is fixing with described oil cylinder head (11), and simultaneously corresponding to described oil outlet (113) and spill port (114), offer one first oil duct (311) and one second oil duct (312) at this valve body (31), one end of the first oil duct (311) communicates with described oil outlet (113), the other end communicates with an end of the second oil duct (312), and the other end of the second oil duct (312) communicates with described spill port (114), valve rod (32) is provided on the valve body (31) with screw thread, one end of this valve rod (32) is being insinuated into behind the first oil duct (311) in the second oil duct (312), and consisting of in the end of this described end of this valve rod (32) has one to be used for control first, the second oil duct (311, the valve of the gap length 312) (321), and valve rod (32) the other end is stretched over outside the valve body (31) and be fixed with an adjusting handle (322).
4.
The cushion cylinder that plastic molding machine according to claim 3 is used is characterized in that upper at described oil cylinder head (11) and is being embedded with the first seal ring (14) corresponding to the position between described oil outlet (113) and described the first oil duct (311); And it is upper and be embedded with one second seal ring (15) corresponding to the position between described spill port (114) and described the second oil duct (312) at oil cylinder head (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103338025A CN102852904A (en) | 2012-09-11 | 2012-09-11 | Buffer oil cylinder for plastic product forming machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103338025A CN102852904A (en) | 2012-09-11 | 2012-09-11 | Buffer oil cylinder for plastic product forming machinery |
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| CN102852904A true CN102852904A (en) | 2013-01-02 |
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| CN2012103338025A Pending CN102852904A (en) | 2012-09-11 | 2012-09-11 | Buffer oil cylinder for plastic product forming machinery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256274A (en) * | 2013-05-30 | 2013-08-21 | 重庆钢铁(集团)有限责任公司 | Anti-impact hydraulic oil cylinder |
| CN106704288A (en) * | 2015-07-14 | 2017-05-24 | 徐工集团工程机械股份有限公司 | Hydraulic cylinder buffering structure and engineering machine with hydraulic cylinder buffering structure |
| CN113513465A (en) * | 2021-04-08 | 2021-10-19 | 西安交通大学 | Oil cylinder side buffering structure of liquid-driven piston compressor and liquid-driven piston compressor |
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| CN106704288A (en) * | 2015-07-14 | 2017-05-24 | 徐工集团工程机械股份有限公司 | Hydraulic cylinder buffering structure and engineering machine with hydraulic cylinder buffering structure |
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| CN113513465A (en) * | 2021-04-08 | 2021-10-19 | 西安交通大学 | Oil cylinder side buffering structure of liquid-driven piston compressor and liquid-driven piston compressor |
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Application publication date: 20130102 |