CN214331054U

CN214331054U - Novel die assembly oil cylinder for oil pressure machinery

Info

Publication number: CN214331054U
Application number: CN202120055615.XU
Authority: CN
Inventors: 吴志炫; 吴志良
Original assignee: Jinjiang Bohong Machinery Co ltd
Current assignee: Jinjiang Bohong Machinery Co ltd
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-10-01
Anticipated expiration: 2031-01-11

Abstract

A novel die closing oil cylinder for oil pressure machinery comprises a rear end cover, a piston rod, a cylinder barrel, a front end cover and a pressurizing plunger, wherein a pressurizing plunger cavity is axially arranged at the inner end of the piston rod, the pressurizing plunger is arranged in the pressurizing plunger cavity, the pressurizing plunger is connected with the piston rod in a sliding sealing manner, the inner end of the pressurizing plunger is connected with the rear end cover through a connector, a plunger cavity oil port is axially arranged at the outer end of the piston rod, the inner end of the plunger cavity oil port is communicated with the pressurizing plunger cavity, a rodless cavity oil port is arranged on the cylinder barrel, and a rod cavity oil port is arranged on the rear end cover; and an ejecting cylinder is arranged in the outer end of the rear end cover. The utility model discloses a modular structure, processing is convenient, and is with low costs, fast-forwards, fast retreat effectual moreover. The oil cylinder can quickly pressurize the sub-cylinder to a soft die assembly position and then to a required pressure under the working condition of bottom load, the requirements of quick stability and large-tonnage die assembly can be realized on the premise of not changing the pressure of a hydraulic system, and the production efficiency is obviously improved.

Description

Novel die assembly oil cylinder for oil pressure machinery

Technical Field

The utility model relates to a hydro-cylinder technical field especially relates to a novel compound die hydro-cylinder is used to oil pressure machinery.

Background

Oil pressure machinery is one of the more common mechanical equipment, and it includes injection molding machine etc. at present, and locking mechanism is one of the important part of injection molding machine, and its function is to realize opening and close the motion, makes the mould closed produce system elastic deformation and reaches the clamping force, locks the mould. The performance of the clamping mechanism itself directly affects the quality of the product.

Common mold closing oil cylinders in the market can be divided into a direct-acting type, a booster type and a liquid flushing type. The mold closing action of the direct-acting mold closing oil cylinder is realized by the action of hydraulic oil on the piston, and the mold locking action is completed by the pressure rise of the hydraulic oil; the booster-type die-closing oil cylinder consists of a die-closing hydraulic cylinder, a flushing valve, a pressure stabilizing oil cylinder and a booster cylinder, and the magnitude of the die-locking force of the booster-type die-closing oil cylinder is related to the structures of the booster oil cylinder and the die-closing oil cylinder, so that the booster oil cylinder is limited by a hydraulic system and sealing and the booster oil cylinder is limited; the liquid-filled type die closing oil cylinder is high in die opening and closing precision and balanced in stress of the die plate, but is easy to cause inward leakage, long in pressure rise time, low in speed, easy to cause hydraulic impact and difficult to machine.

The Chinese patent with the patent number of CN03237446.1 discloses a die-casting machine die-closing composite oil cylinder, which comprises a primary pressurizing cylinder body and a secondary pressurizing cylinder body, wherein one end of a main piston rod is positioned in the primary pressurizing cylinder body, and the other end of the main piston rod is positioned in the secondary pressurizing cylinder of the secondary pressurizing cylinder body; one end of the quick-moving cylinder piston rod is positioned in the quick-moving mold cylinder, and the other end of the quick-moving cylinder piston rod penetrates through a quick-moving cylinder piston rod hole in the primary pressurizing cylinder body and is fixedly connected with the primary pressurizing cylinder body; one end of the ejection cylinder piston rod is positioned in the ejection cylinder, and the other end of the ejection cylinder piston rod penetrates through an ejection cylinder piston rod hole in the secondary supercharging cylinder body. The utility model discloses four jars are integrative, secondary pressurized cylinder and liftout cylinder interlocking, its simple structure, the motion is steady, reliable operation, exert oneself very big, the very little energy-saving of power, and can home-made serialization, standardized full fluid pressure type die casting machine compound oil cylinder of compound die. However, the utility model has the following defects: 1. moving end weight is too big, and easy skew wearing and tearing end cover causes interior diarrhoea, and 2, the antidetonation effect is poor, and the vibrations that produce when opening and shutting the mould cause the injury to plunger and end cover easily, influence the leakproofness between end cover and the plunger, cause the fluid to leak, and 3, during operation plunger meeting axial rotation, the operation is unstable, needs extra guiding mechanism, otherwise will influence the compound die precision.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve the problem that above-mentioned prior art exists, provide a novel compound die hydro-cylinder is used to oil pressure machinery, adopt the antidetonation effectual, operate steadily, processing and maintenance convenience.

The utility model provides a technical scheme that its technical problem adopted: the utility model provides an oil pressure machinery is with novel compound die hydro-cylinder, includes rear end cap, piston rod, cylinder, front end housing and pressure boost plunger, set up the piston rod in the cylinder, piston rod inner is equipped with first piston, and the external diameter of first piston cooperatees with the internal diameter of cylinder body, and first piston separates into no pole chamber with the inner chamber of cylinder and has the pole chamber, rear end cap and front end housing are set up respectively at the cylinder both ends, front end housing, characterized by are stretched out to the piston rod outer end: the outer end of the piston rod is provided with a fixed ring, the fixed ring is provided with a plurality of support rods, the top end of each support rod is provided with a fixed ring, the fixed ring is provided with a first electromagnet, the bottom end of each support rod is provided with a movable ring, the movable ring is provided with a second electromagnet, the movable ring is in sliding connection with the support rods, the movable ring is fixedly connected with the front end cover, the support rods are further provided with buffer springs, the rear end cover is provided with a vibration sensor, the vibration sensor is connected with a controller, and the controller is connected with the first electromagnet and the second electromagnet through wires.

According to the technical scheme, the movable die is fixed at one end of the rear end cover, the right end of the piston rod and the fixed ring are fixedly installed on the die machine, when the die is closed, the second electromagnet on the movable ring moves close to the first electromagnet on the fixed ring along with the front end cover, at the moment of closing the die, the vibration sensor of the rear end cover converts the vibration transmitted by the movable die into an electric signal and transmits the electric signal to the controller, the controller starts the first electromagnet and the second electromagnet to be electrified, the size and the direction of the magnetic force between the first electromagnet and the second electromagnet are changed, the first electromagnet, the second electromagnet and the buffer spring form an electromagnetic spring, the vibration is transferred to the die machine installed on the fixed ring, the influence of the vibration on the oil cylinder is reduced, the impact of the first piston on the front end cover is relieved, and the service lives of the first piston and the front end cover are prolonged; when the die is opened, the first electromagnet and the second electromagnet are started to repel, a boosting effect can be achieved on the retraction of the piston rod, the starting speed of the oil cylinder is increased, and the effect of quick retraction of the oil cylinder is enhanced.

The rear end cover and the front end cover are connected through a plurality of oil cylinder pull rods by bolts, a pressurizing plunger cavity is axially arranged at the inner end of the piston rod, a pressurizing plunger is arranged in the pressurizing plunger cavity, the pressurizing plunger is connected with the piston rod in a sliding and sealing manner, the inner end of the pressurizing plunger is connected with the rear end cover through a connector, a plunger cavity oil port is axially arranged at the outer end of the piston rod, the inner end of the plunger cavity oil port is communicated with the pressurizing plunger cavity, a rodless cavity oil port is arranged on the cylinder barrel, and a rod cavity oil port is arranged on the rear end cover; the ejection mechanism is characterized in that an ejection cylinder is arranged in the outer end of the rear end cover, an ejection cylinder end cover is arranged at the outer end of the ejection cylinder, an ejection piston rod is arranged in the ejection cylinder, a second piston is arranged at the inner end of the ejection piston rod, an ejection cavity and a reset cavity are formed in the inner cavity of the ejection cylinder by the second piston, an ejection cavity oil port and a reset cavity oil port are correspondingly arranged on the rear end cover, the outer end of the ejection piston rod penetrates through the ejection cylinder end cover to be connected with a limiting plate, and an ejector rod is arranged on the limiting plate.

Through the technical scheme: two paths of high-pressure oil respectively enter from a plunger cavity oil port and a rod cavity oil port at the same time, and the first path of high-pressure oil enters a pressurizing plunger cavity of the piston rod through an oil duct, presses the end face of the pressurizing plunger and reacts on the piston rod, so that the piston rod is pushed to extend out; the second path of high-pressure oil enters the rod cavity through the oil duct on the rear end cover, and presses the inner end surface of the piston rod, so that the piston rod is pushed to extend out; the oil in the rodless cavity is discharged through the rodless cavity oil port on the cylinder barrel, mold closing of the mold is achieved, the flow direction of the oil is changed through the reversing valve, the rodless cavity oil port is fed with oil, the plunger cavity oil port and the rod cavity oil port return oil, and the mold opening of the mold can be achieved through retraction of the piston rod. When the mold is opened, an oil inlet is formed in an oil port of an ejection cavity on the rear end cover, the oil is filled in the ejection cavity of the ejection cylinder, and the oil in the reset cavity is discharged from an oil port of the reset cavity, so that the ejection piston rod is pushed to extend out, the ejector rod on the limiting plate is driven to push the mold ejector pin fixing plate to move, and the automatic demolding of the plastic part is realized.

The utility model realizes fast forward and fast backward of the mold closing oil cylinder and can generate larger mold closing force; adopt integrated configuration, processing is convenient, has manufactured cost, simultaneously the utility model discloses can realize the automatic drawing of patterns to moulding when the mould die sinking, work efficiency is high, the stability of hydro-cylinder is good and long service life.

For further perfection, be fixed with hydro-cylinder end cover back piece on the rear end cap, hydro-cylinder end cover back piece is used for fixed mould, is equipped with T type groove on the hydro-cylinder end cover back piece, the limiting plate corresponds T type groove and sets up to the T shape, has reduced the area of limiting plate, and location effect is good, has still saved the processing material.

Further perfect, rear end cap inner and front end cap inner all are equipped with the boss structure, are equipped with the retaining ring between boss and the cylinder inner wall are equipped with, are equipped with O type sealing washer between cylinder inner wall terminal surface and rear end cap terminal surface and the front end cap terminal surface, have the structure of dual seal between end cover and the cylinder, and the leakproofness is good.

Further perfection, be equipped with WR sealing washer and glary circle between pressure boost plunger and the piston rod, the leakproofness when sliding is good.

Further perfecting, be equipped with BRT sealing washer, RYT sealing washer and USH sealing washer between first piston and the cylinder, compound three kinds of sealing members, improved the sliding seal nature between first piston and the cylinder greatly.

Further perfect, the piston rod outer end is close to plunger chamber oil port department and is equipped with the mounting groove, can pack into the position circle, makes things convenient for the installation and the fixed of piston rod.

Further perfect, the eccentric position of piston rod inner still is equipped with two location chambeies about the axle center symmetry, is equipped with the location plunger in the location intracavity, for sliding seal connection between location plunger and the piston rod, the inner joint piece of connecting of location plunger, location chamber outer end side direction intercommunication plunger chamber hydraulic fluid port.

Through above-mentioned technical scheme, the location plunger can fix a position the direction to the piston rod, rotates when preventing that the piston rod from removing, and stability is good when the piston rod moves, can also strengthen fluid area of contact, strengthens the thrust of hydro-cylinder, improves fast-forward effect.

The utility model discloses profitable effect is: 1. the utility model adopts a combined structure, is convenient to process and maintain and has low manufacturing cost; 2. when the die is closed, two paths of high-pressure oil respectively enter from an oil port of a plunger cavity and an oil port of a rod cavity at the same time, reach a pressurizing plunger cavity and the rod cavity, and exert pressure on two positions of a piston rod, so that the piston rod extends out, an oil cylinder can pressurize a sub-cylinder to a soft die closing position quickly under the working condition of bottom load and then pressurize to required pressure, the requirements of quick stability and large-tonnage die closing can be realized on the premise of not changing the pressure of a hydraulic system, the production efficiency is obviously improved, the trouble that the large-tonnage and slow-speed of the original equipment are solved, and if the original equipment requires high speed, a motor corresponding to the flow of a hydraulic pump needs to be increased, so that the die is not economic; 3. the rear end cover and the front end cover are connected through a plurality of oil cylinder pull rods by bolts, the oil inlet rear end cover can bear large impact force, the end cover is not easy to damage, the sealing performance between the cylinder body and the end cover is ensured, and the oil leakage problem is solved; 4. the design of the ejection oil cylinder is added in the rear end cover, the requirement on the installation space of the die is reduced, the two oil cylinders can synchronously act when the die is opened, the demoulding efficiency of a workpiece is high, and the action is smooth and stable, 5, an electromagnetic damping device is arranged outside the oil cylinders, so that the vibration generated when the die is opened and closed can be transferred to a die machine, the influence of the vibration on the oil cylinders is reduced, the impact of a first piston on the front end cover is relieved, and the service lives of the first piston and the front end cover are prolonged; when the die is opened, the first electromagnet and the second electromagnet are started to repel, a boosting effect can be achieved on the retraction of the piston rod, the starting speed of the oil cylinder is increased, and the effect of quick retraction of the oil cylinder is enhanced; 6. be equipped with the location plunger in the piston rod, can prevent to rotate when the piston rod from removing to advance line location direction, stability is good when the piston rod moves, and the shock resistance is good.

Drawings

FIG. 1 is a sectional view of the present invention taken along the line A-A;

FIG. 2 is a sectional view of the present invention taken along the line B-B;

fig. 3 is a side view of the present invention;

FIG. 4 is a schematic structural view of the knock-out cylinder of the present invention;

fig. 5 is a schematic view of a sealing structure between the pressurizing plunger and the piston rod of the present invention;

fig. 6 is a schematic view of a sealing structure between the supercharging cylinder and the end cover of the present invention;

description of reference numerals: 1. rear end cover, 101, rod cavity oil port, 102, ejection cavity oil port, 103, reset cavity oil port, 2, piston rod, 201, first piston, 202, pressurizing plunger cavity, 203, plunger cavity oil port, 204, positioning cavity, 3, cylinder barrel, 301, rodless cavity, 302, rod cavity, 303, rodless cavity oil port, 4, front end cover, 5, pressurizing plunger, 6, joint piece, 7, ejection cylinder, 701, ejection cavity, 702, reset cavity, 8, ejection cylinder end cover, 9, ejection piston rod, 901, second piston, 10, limiting plate, 11, ejector rod, 12, mounting groove, 13, cylinder end cover rear block, 1301, T-shaped groove, 14, cylinder pull rod, 15, check ring, 16, O-shaped sealing ring, 17, fixing ring, 18, support rod, 19, fixed ring, 20, first electromagnet, 21, movable ring, 22, second electromagnet, 23, buffer spring, 24, positioning plunger, 25, Vibration sensor, 26, controller, 27, USH sealing ring, 28, WR sealing ring, 29, Glare circle.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

in this embodiment 1, a novel mold closing cylinder for an oil pressure machine includes a rear end cap 1, a piston rod 2, a cylinder barrel 3, a front end cap 4 and a pressurizing plunger 5, the piston rod 2 is disposed in the cylinder barrel 3, a first piston 201 is disposed at an inner end of the piston rod 2, an outer diameter of the first piston 201 is matched with an inner diameter of the cylinder barrel 3, the inner cavity of the cylinder barrel 3 is divided into a rodless cavity 301 and a rod cavity 302 by the first piston 201, the rear end cap 1 and the front end cap 4 are disposed at two ends of the cylinder barrel 3 respectively, an outer end of the piston rod 2 extends out of the front end cap 4, a fixing ring 17 is disposed at an outer end of the piston rod 2, a plurality of support rods 18 are disposed on the fixing ring 17, a fixing ring 19 is mounted at a top end of the support rods 18, a first electromagnet 20 is disposed on the fixing ring 19, a movable ring 21 is mounted at a bottom end of the support rods 18, a second electromagnet 22 is disposed on the movable ring 21, and the support rods 18 are slidably connected, the movable ring 21 is fixedly connected with the front end cover 4, the support rod 18 is further provided with a buffer spring 23, the rear end cover 1 is provided with a vibration sensor 25, the vibration sensor 25 is connected with a controller 26, and the controller 26 is connected with the first electromagnet 20 and the second electromagnet 22 through conducting wires.

Through the technical scheme, one end of the rear end cover 1 is fixed with the movable mould, the right end of the piston rod 2 and the fixed ring 17 are fixedly arranged on the mould machine, when the die is closed, the second electromagnet 22 on the movable ring 21 moves close to the first electromagnet 20 on the fixed ring 19 along with the front end cover, at the moment of closing the die, the vibration sensor 25 of the rear end cover 1 converts the vibration transmitted by the movable die into an electric signal and transmits the electric signal to the controller 26, the controller 26 starts the first electromagnet 20 and the second electromagnet 22 to be electrified, the size and the direction of the magnetic force between the first electromagnet 20 and the second electromagnet 22 are changed, the first electromagnet 20, the second electromagnet 22 and the buffer spring 23 form an electromagnetic spring, the vibration is transferred to a die machine connected with the fixed ring 17, the influence of the vibration on an oil cylinder is reduced, the impact of the first piston 201 on the front end cover 4 is relieved, and the service lives of the first piston 201 and the front end cover 4 are prolonged; when the mould is opened, the first electromagnet 20 and the second electromagnet 22 are started to repel, a boosting effect can be achieved on the retraction of the piston rod 2, the starting speed of the oil cylinder is increased, and the effect of quick retraction of the oil cylinder is enhanced.

Referring to fig. 1 and 2, the rear end cover 1 and the front end cover 4 are connected by bolts through a plurality of oil cylinder pull rods 14, a pressurizing plunger cavity 202 is axially arranged at the inner end of the piston rod 2, a pressurizing plunger 5 is arranged in the pressurizing plunger cavity 202, the pressurizing plunger 5 is connected with the piston rod 2 in a sliding and sealing manner, the inner end of the pressurizing plunger 5 is connected with the rear end cover 1 through a connector 6, a plunger cavity oil port 203 is axially arranged at the outer end of the piston rod 2, the inner end of the plunger cavity oil port 203 is communicated with the pressurizing plunger cavity 202, a rodless cavity oil port 303 is arranged on the cylinder barrel 3, and a rod cavity oil port 101 is arranged on the rear end cover 1; the outer end of the rear end cover 1 is internally provided with an ejection cylinder 7, the outer end of the ejection cylinder 7 is provided with an ejection cylinder end cover 8, an ejection piston rod 9 is arranged in the ejection cylinder 7, a second piston 901 is arranged at the inner end of the ejection piston rod 9, the inner cavity of the ejection cylinder 7 is divided into an ejection cavity 701 and a reset cavity 702 by the second piston 901, an ejection cavity oil port 102 and a reset cavity oil port 103 are correspondingly arranged on the rear end cover 1, the outer end of the ejection piston rod 9 penetrates through the ejection cylinder end cover 8 to be connected with a limiting plate 10, and an ejector rod 11 is arranged on the limiting plate 10.

The working process of the scheme is as follows: two paths of high-pressure oil respectively enter from the plunger cavity oil port 203 and the rod cavity oil port 101 at the same time, the first path of high-pressure oil enters the pressurizing plunger cavity 202 of the piston rod 2 through the oil duct, presses the end surface of the pressurizing plunger 5 and reacts on the piston rod 2, so that the piston rod 2 is pushed to extend out; a second path of high-pressure oil enters the rod cavity 302 through the oil passage on the rear end cover 1, and presses the inner end surface of the piston rod 2, so that the piston rod 2 is pushed to extend out; oil in the rodless cavity 301 is discharged through a rodless cavity oil port 303 in the cylinder barrel 3, mold closing of the mold is achieved, the flow direction of the oil is changed through the reversing valve, the rodless cavity oil port 303 is used for feeding oil, the plunger cavity oil port 203 and the rod cavity oil port 101 are used for returning oil, and mold opening of the mold can be achieved through retraction of the piston rod 2. When the mold is opened, an oil inlet is formed in an oil outlet 102 of the ejection cavity on the rear end cover 1, the oil is filled in the ejection cavity 701 of the ejection cylinder 7, and the oil in the reset cavity 702 is discharged from an oil outlet 103 of the reset cavity, so that the ejection piston rod 9 is pushed to extend out, the ejector rod 11 on the limiting plate 10 is driven to push the mold ejector pin fixing plate to move, and the automatic demolding of the plastic part is realized.

The utility model discloses realize fast-forwarding and fast-backing of compound die hydro-cylinder, can produce great compound die power simultaneously, during the compound die, two way high-pressure fluid gets into simultaneously from plunger chamber hydraulic fluid mouth and pole chamber hydraulic fluid mouth respectively, reach pressure boost plunger chamber and have the pole chamber, exert pressure to two places of piston rod, thereby make the piston rod stretch out, the hydro-cylinder can be fast to soft compound die position repressurization to required pressure to the sub-cylinder pressurization under the end load operating mode, can realize fast and stable and large-tonnage compound die requirement under the prerequisite that does not change hydraulic system pressure, production efficiency obtains obvious promotion, solve former equipment compound die tonnage slow-down, former equipment just will increase the corresponding motor of hydraulic pump flow if required speed is fast, economy inadequately.

The eccentric position of the inner end of the piston rod 2 is also provided with two positioning cavities 204 which are symmetrical about the axis, positioning plungers are arranged in the positioning cavities 204 and are connected with the piston rod 2 in a sliding sealing mode, the inner ends of the positioning plungers are connected with a connector 6, and the outer ends of the positioning cavities 204 are laterally communicated with a plunger cavity oil port 203.

Through above-mentioned technical scheme, the location plunger can fix a position the direction to piston rod 2, rotates when preventing that piston rod 2 from removing, and stability is good when piston rod 2 moves, can also strengthen fluid area of contact, strengthens the thrust of hydro-cylinder, improves fast-forward effect.

While the invention has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

Claims

1. The utility model provides an oil pressure machinery is with novel compound die hydro-cylinder, includes rear end housing (1), piston rod (2), cylinder (3), front end housing (4) and pressure boost plunger (5), set up piston rod (2) in cylinder (3), piston rod (2) the inner is equipped with first piston (201), and the external diameter of first piston (201) cooperatees with the internal diameter of cylinder (3), and first piston (201) separate into rodless chamber (301) and have pole chamber (302) with the inner chamber of cylinder (3), rear end housing (1) and front end housing (4) are set up respectively at cylinder (3) both ends, front end housing (4), characterized by are stretched out to piston rod (2) outer end: piston rod (2) outer end is equipped with retainer plate (17), is equipped with a plurality of cradling pieces (18) on retainer plate (17), and stationary ring (19) are installed on cradling piece (18) top, are equipped with first electro-magnet (20) on stationary ring (19), rotating ring (21) is installed to cradling piece (18) bottom, are equipped with second electro-magnet (22) on rotating ring (21), be sliding connection between rotating ring (21) and cradling piece (18), be fixed connection between rotating ring (21) and front end housing (4), still be equipped with buffer spring (23) on cradling piece (18), be equipped with vibration sensor (25) on rear end housing (1), vibration sensor (25) connection director (26), first electro-magnet (20) and second electro-magnet (22) are connected through the wire in controller (26).

2. The new type of closing cylinder for hydraulic machine as claimed in claim 1, wherein: the rear end cover (1) is in bolted connection with the front end cover (4) through a plurality of oil cylinder pull rods (14), a pressurizing plunger cavity (202) is axially arranged at the inner end of the piston rod (2), a pressurizing plunger (5) is arranged in the pressurizing plunger cavity (202), the pressurizing plunger (5) is in sliding sealed connection with the piston rod (2), the inner end of the pressurizing plunger (5) is connected with the rear end cover (1) through a connector (6), a plunger cavity oil port (203) is axially arranged at the outer end of the piston rod (2), the inner end of the plunger cavity oil port (203) is communicated with the pressurizing plunger cavity (202), a rodless cavity oil port (303) is arranged on the cylinder barrel (3), and a rod cavity oil port (101) is arranged on the rear end cover (1); rear end cap (1) outer end embeds there is one ejection jar (7), and ejection jar (7) outer end is equipped with ejection jar end cover (8), be equipped with ejection piston rod (9) in ejection jar (7), ejection piston rod (9) inner is equipped with second piston (901), and second piston (901) divide into ejection chamber (701) and chamber (702) that resets with ejection jar (7) inner chamber, it is equipped with ejection chamber hydraulic fluid port (102) and chamber hydraulic fluid port (103) that resets to correspond on rear end cap (1), spacing board (10) are connected in ejection cylinder end cover (8) is passed to ejection piston rod (9) outer end, is equipped with ejector pin (11) on spacing board (10).

3. The new type of closing cylinder for hydraulic machine as claimed in claim 2, wherein: an oil cylinder end cover rear block (13) is fixed on the rear end cover (1), a T-shaped groove (1301) is formed in the oil cylinder end cover rear block (13), and the limiting plate (10) is arranged in a T shape corresponding to the T-shaped groove (1301).

4. The new mold clamping cylinder for hydraulic machine as claimed in claim 3, wherein: the inner end of the rear end cover (1) and the inner end of the front end cover (4) are respectively provided with a boss structure, a check ring (15) is arranged between the boss and the inner wall of the cylinder barrel (3), and an O-shaped sealing ring (16) is arranged between the end face of the inner wall of the cylinder barrel (3) and the end faces of the rear end cover (1) and the front end cover (4).

5. The new type of closing cylinder for hydraulic machine as claimed in claim 1, wherein: a WR sealing ring (28) and a Glare ring (29) are arranged between the pressurizing plunger (5) and the piston rod (2).

6. The new type of closing cylinder for hydraulic machine as claimed in claim 1, wherein: a BRT sealing ring, an RYT sealing ring and a USH sealing ring (27) are arranged between the first piston (201) and the cylinder barrel (3).

7. The new type of closing cylinder for hydraulic machine as claimed in claim 1, wherein: and a mounting groove (12) is formed in the outer end of the piston rod (2) close to the oil port (203) of the plunger cavity.

8. The new type of closing cylinder for hydraulic machine as claimed in claim 1, wherein: the eccentric position of piston rod (2) inner still is equipped with two location chamber (204) about the axle center symmetry, is equipped with the location plunger in location chamber (204), is sliding seal between location plunger and the piston rod (2) and is connected, location plunger inner connection joint spare (6), location chamber (204) outer end side direction intercommunication plunger chamber hydraulic fluid port (203).