CN102852903A - Buffer cylinder structure for plastic product molding machine - Google Patents

Buffer cylinder structure for plastic product molding machine Download PDF

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Publication number
CN102852903A
CN102852903A CN2012103337643A CN201210333764A CN102852903A CN 102852903 A CN102852903 A CN 102852903A CN 2012103337643 A CN2012103337643 A CN 2012103337643A CN 201210333764 A CN201210333764 A CN 201210333764A CN 102852903 A CN102852903 A CN 102852903A
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CN
China
Prior art keywords
oil
cylinder
tailstock
buffering
pocket
Prior art date
Application number
CN2012103337643A
Other languages
Chinese (zh)
Inventor
吴国春
刘俊
Original Assignee
苏州同大机械有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 苏州同大机械有限公司 filed Critical 苏州同大机械有限公司
Priority to CN2012103337643A priority Critical patent/CN102852903A/en
Publication of CN102852903A publication Critical patent/CN102852903A/en

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Abstract

The invention discloses a buffer cylinder structure for a plastic product molding machine, and belongs to the technical field of power sources of plastic product molding machines. The buffer cylinder structure comprises a cylinder body and a cylinder column, wherein the cylinder body is provided with a tailstock and a buffer oil chamber on the tailstock; and the cylinder column is arranged in the oil chamber of the cylinder body. A cylinder column piston head expands at one end of the cylinder column and is provided with a piston head seal ring; and an oil inlet is formed on a side part of the tailstock. The buffer cylinder structure is characterized in that a buffering column is formed on a surface on one side of the cylinder column piston head towards the buffering cylinder; an oil outlet and an oil return hole are formed in the tailstock; a pressure oil flow regulation mechanism is arranged on an external wall of the tailstock and is communicated with the oil outlet and the oil return hole at the same time to control the size of the pressure oil flow of the oil outlet and the oil return hole. The buffer cylinder structure has the advantages of avoiding collision to the tailstock and damage to the cylinder body, simple structure, and simplicity in manufacturing and mounting.

Description

The cushion cylinder structure that plastic molding machine is used
Technical field
The invention belongs to the power source technical field of plastic molding machine, be specifically related to the cushion cylinder structure that a kind of plastic molding machine is used
Background technique
The oil cylinder that plastic product 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), the ZL201020157649.1(mould opening-closing 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 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.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.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 rationally regulate buffer level, 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 damages easily, 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 speed 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 structure that plastic molding machine easy to assembly is used.
Task of the present invention is finished like this, the cushion cylinder structure that a kind of plastic molding machine is used, comprise and have tailstock and the oil cylinder post in tailstock consists of the cylinder block that the buffering oil pocket is arranged and the oil pocket that is arranged on cylinder block, wherein: be provided with a diameter greater than the oil cylinder column piston head of oil cylinder column diameter at the oil cylinder post towards the expansion of an end end of described 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, and offer a turnover oilhole that communicates with described rear chamber at the sidepiece of tailstock, the turnover oilhole communicates with described buffering oil pocket, and the buffering oil pocket communicates with described rear chamber, be characterised in that: described oil cylinder column piston head towards the surface of described 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 buffering oil pocket, when described oil cylinder post stretches outside described oil pocket, bumper post withdraws from the buffering oil pocket, and when the oil cylinder post bounces back in the oil pocket, bumper post enters in the buffering oil pocket, on described tailstock and the same side that is positioned at tailstock offer an oil outlet and a spill port, oil outlet communicates with described rear chamber, and spill port communicates with described buffering oil pocket, being provided with one on the outer wall of tailstock and in the position corresponding to oil outlet and spill port is used for oil outlet and the spill port pressure oil flow control device of conducting each other, 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 from described oil cylinder column piston head towards the gradually narrow contracting and constitute the shape of circular cone stage body of the direction of described tailstock.
In another specific embodiment of the present invention, described pressure oil flow control device comprises valve body and valve rod, valve body and described tailstock 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 formation has one to be used for control first in a described end end of this valve rod, 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 tailstock 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 tailstock 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 bounces back in the oil pocket of cylinder block when the oil cylinder post, pressure oil in the rear chamber is drawn from the turnover oilhole fast, when bumper post enters the buffering oil pocket, with rear chamber and the blocking-up of buffering oil pocket, pressure oil in the rear chamber enters the pressure oil flow control device with the state of small flow through oil outlet, enter the buffering oil pocket through the pressure oil flow control device by spill port, released by the turnover oilhole, thereby reach the buffer function to the oil cylinder post, the phenomenon of tailstock can not occur clashing into; 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 the sectional view of pressure oil flow control device shown in Figure 1.
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.
Please be referring to Fig. 1, provided the cylinder block 1 with tailstock 11, although the claimant only shows the tailstock 11 of cylinder block in Fig. 1, but can't also have front stall to cylinder block 1 produces puzzled, because according to common practise, cylinder block 1 strictly is limited between tailstock 11 and the front stall by one group of fixing rod 15.Oil pocket 12 in the cylinder chamber of cylinder block 1 consists of, these oil pocket 12 interior settings move up and down the oil cylinder post 2 of (take the shown position state as example).
Aforesaid tailstock 11 consists of has one to cushion oil pocket 111, and offers a turnover oilhole 112 at the sidepiece of tailstock 11, and 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 11, 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 12 form sealing by this group of piston head seal ring 211, and cooperated oil cylinder column piston head 21 and made aforesaid oil pocket 12 be separated into front chamber 121 and rear chamber 122 by piston head seal ring 211, rear chamber 122 communicates with aforesaid buffering oil pocket 111.More particularly, aforesaid turnover oilhole 112 communicates with buffering oil pocket 111, and buffering oil pocket 111 communicates with rear chamber 122.
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 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 buffering oil pocket 111, in the present embodiment, the diameter of bumper post 212 from oil cylinder column piston head 21 towards the gradually narrow contracting and constitute the shape of circular cone of the direction of tailstock 11.When oil cylinder post 2 during to oil pocket 12 outer stretching, extension, namely when deviating from the direction displacement that cushions oil pocket 111, then bumper post 212 withdraws from buffering oil pocket 111, otherwise, when oil cylinder post 2 during to the oil pocket 12 interior retraction of cylinder block 1, namely towards the buffering oil pocket 111 the direction displacement time, bumper post 212 probe into the buffering oil pocket 111 in.On aforesaid tailstock 11 and the same side that is positioned at tailstock 11 offer respectively an oil outlet 113 and a spill port 114, oil outlet 113 communicates with rear chamber 122, spill port 114 then communicates with buffering oil pocket 111.
For use, conducting and realize that the pressure oil flow can regulate and control between the spill port 113,114, therefore on the outer wall of tailstock 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.
See also Fig. 2 and continuation in conjunction with 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 313 are fixing with tailstock 11, 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 state shown in Figure 2 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 tailstock 11 and be embedded with one first seal ring 13 corresponding to the position between oil outlet 113 and the first oil duct 311, and on the tailstock 11 and be embedded with one second seal ring 14 corresponding to the position between spill port 114 and the second oil duct 312.Play by first, second seal ring 13,14 and to prevent that pressure oil from oozing out from the matching gap between valve body 31 and the tailstock 11.
When oil cylinder post 2 during towards the motion of the direction of tailstock 11, when namely oil cylinder post 2 was to the oil pocket 12 interior retraction of cylinder block 1, the pressure oils in the rear chamber 122 of oil pocket 12 entered fast the buffering oil pocket 111 of tailstock 11 and draw by passing in and out oilhole 112.In this process, when bumper post 212 enters buffering oil pocket 111 when interior, then by bumper post 212 path between rear chamber 122 and the buffering oil pocket 111 is blocked, at this moment, pressure oil in the rear chamber 122 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 buffering oil pocket 111 by spill port 114, and then draw (releasing) by 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.
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 molding machine that can be applied to any structural type

Claims (4)

1. The cushion cylinder structure that a kind of plastic molding machine is used, comprise and have tailstock (11) and consist of at tailstock (11) and the cylinder block (1) of buffering oil pocket (111) to be arranged and be arranged on oil cylinder post (2) in the oil pocket (12) of cylinder block (1), wherein: be provided with a diameter greater than the oil cylinder column piston head (21) of oil cylinder post (2) diameter at oil cylinder post (2) towards the expansion of an end end of described tailstock (11), 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 (12) and oil pocket (12) is divided into front chamber (121) and rear chamber (122) at oil cylinder column piston head (21), and offer a turnover oilhole (112) that communicates with described rear chamber (122) at the sidepiece of tailstock (11), turnover oilhole (112) communicates with described buffering oil pocket (111), and buffering oil pocket (111) communicates with described rear chamber (122), it is characterized in that: described oil cylinder column piston head (21) towards the surface of described 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 buffering oil pocket (111), when described oil cylinder post (2) stretches outside described oil pocket (12), bumper post (212) withdraws from buffering oil pocket (111), and when oil cylinder post (2) in the oil pocket (12) during retraction, bumper post (212) enters in the buffering oil pocket (111), and the same side that be positioned at tailstock (11) upper at described tailstock (11) offers an oil outlet (113) and a spill port (114), oil outlet (113) communicates with described rear chamber (122), and spill port (114) communicates with described buffering oil pocket (111), being provided with one on the outer wall of tailstock (11) and in the position corresponding to oil outlet (113) and spill port (114) is used for oil outlet (113) and spill port (114) the pressure oil flow control device (3) of conducting each other, 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 structure that plastic molding machine according to claim 1 is used, the diameter that it is characterized in that described bumper post (212) from described oil cylinder column piston head (21) towards the gradually narrow contracting and constitute the shape of circular cone stage body of the direction of described tailstock (11).
3. The cushion cylinder structure 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 tailstock (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 formation has one to be used for control first in a described end end of this valve rod (32), 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 structure that plastic molding machine according to claim 3 is used is characterized in that upper at described tailstock (11) and is being embedded with the first seal ring (13) 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 (14) corresponding to the position between described spill port (114) and described the second oil duct (312) at tailstock (11)
CN2012103337643A 2012-09-11 2012-09-11 Buffer cylinder structure for plastic product molding machine CN102852903A (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57134032A (en) * 1981-02-09 1982-08-19 Hitachi Constr Mach Co Ltd Cushion device of oil pressure cylinder
US5517898A (en) * 1995-03-29 1996-05-21 Korea Institute Of Machinery & Materials Pneumatic cylinder utilizing cushioning sleeves, quick exhaust valves and quick supply valves
JP2005282739A (en) * 2004-03-30 2005-10-13 Kuroda Pneumatics Ltd Cylinder device
CN201636117U (en) * 2010-03-10 2010-11-17 无锡市长江液压缸厂 Adjustable gap-buffer hydraulic cylinder
CN202132304U (en) * 2011-07-29 2012-02-01 合肥长源液压股份有限公司 High-pressure oil cylinder with combined buffering device in rodless cavity
CN102588385A (en) * 2012-02-14 2012-07-18 宁波亚德客自动化工业有限公司 Throttling and buffering integrated structure of cylinder
CN202381438U (en) * 2011-10-31 2012-08-15 张国庆 Buffering oil hydraulic cylinder
CN202789849U (en) * 2012-09-11 2013-03-13 苏州同大机械有限公司 Cushion cylinder structure for plastic product forming machine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57134032A (en) * 1981-02-09 1982-08-19 Hitachi Constr Mach Co Ltd Cushion device of oil pressure cylinder
US5517898A (en) * 1995-03-29 1996-05-21 Korea Institute Of Machinery & Materials Pneumatic cylinder utilizing cushioning sleeves, quick exhaust valves and quick supply valves
JP2005282739A (en) * 2004-03-30 2005-10-13 Kuroda Pneumatics Ltd Cylinder device
CN201636117U (en) * 2010-03-10 2010-11-17 无锡市长江液压缸厂 Adjustable gap-buffer hydraulic cylinder
CN202132304U (en) * 2011-07-29 2012-02-01 合肥长源液压股份有限公司 High-pressure oil cylinder with combined buffering device in rodless cavity
CN202381438U (en) * 2011-10-31 2012-08-15 张国庆 Buffering oil hydraulic cylinder
CN102588385A (en) * 2012-02-14 2012-07-18 宁波亚德客自动化工业有限公司 Throttling and buffering integrated structure of cylinder
CN202789849U (en) * 2012-09-11 2013-03-13 苏州同大机械有限公司 Cushion cylinder structure for plastic product forming machine

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