CN108730243B - Pressurized cylinder of mould closing device of blow molding machine - Google Patents
Pressurized cylinder of mould closing device of blow molding machine Download PDFInfo
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- CN108730243B CN108730243B CN201810883108.8A CN201810883108A CN108730243B CN 108730243 B CN108730243 B CN 108730243B CN 201810883108 A CN201810883108 A CN 201810883108A CN 108730243 B CN108730243 B CN 108730243B
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- end cover
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/56—Opening, closing or clamping means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1409—Characterised by the construction of the motor unit of the straight-cylinder type with two or more independently movable working pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Actuator (AREA)
Abstract
A booster cylinder of a mould closing device of a blow molding machine belongs to the field of hollow plastic product forming machinery. The cylinder body is fixedly arranged at the left end face of the cylinder body, the pressurizing cylinder is fixedly arranged at the right end of the cylinder body, a check valve oil hole and a check valve cavity are formed in the pressurizing cylinder, a check valve is arranged in the valve cavity, the cylinder body right end cover is connected with the pressurizing cylinder, an end cover oil inlet and outlet hole is formed in the bottom wall of the cylinder body right end cover, the piston rod is arranged in the cylinder body, and a piston sealing ring is arranged on the outer wall of the piston rod; the supercharging piston is arranged in a supercharging piston cavity of the right end cover of the cylinder body, a supercharging piston column is arranged on the left side of the supercharging piston, a supercharging piston top cover is fixed with the left end face of the supercharging piston column, and a supercharging piston top cover oil hole is formed in the supercharging piston top cover; the oil path channel opening and closing mechanism is arranged in the oil cavity of the pressurizing piston and is connected with the top cover of the pressurizing piston. The automatic pressurizing and automatic pressure relief effects are good; the structure is simple and compact; the efficient and ideal supercharging effect is embodied.
Description
Technical Field
The invention belongs to the technical field of hollow plastic product forming machinery, and particularly relates to a pressurizing oil cylinder of a mold clamping device of a blow molding machine.
Background
The known hollow plastic product forming machine generally comprises a machine base, a die frame moving device arranged on the machine base, a left die frame and a right die frame which are in transmission connection with the die frame moving device and are folded or separated from each other under the operation of the die frame moving device, and a die clamping device (such as CN 106827313A) arranged on the left die frame and the right die frame. One of a pair of mold halves, such as a left mold half, for blowing a hollow plastic article is mounted on the aforementioned left mold frame (also referred to as a "front mold frame"), and the other mold half, such as a right mold half, of the pair of mold halves is mounted on the aforementioned right mold frame (also referred to as a "back mold frame"), the left and right mold halves corresponding to each other. When the mold clamping device of the blow molding machine is used for clamping, the mold frame moving device is firstly operated to enable the left mold frame and the right mold frame to be mutually closed, so that the left mold half and the right mold half which are the pair of mold halves fixed on the opposite sides of the left mold frame and the right mold frame are driven by the left mold and the right mold to be closed (the mold halves are commonly called as mold clamping in the industry). After the pair of halves are closed, the pair of halves are typically locked by operation of a mold locking device.
The positive significance of the mode locking device is that: the pair of half molds (i.e., left and right half molds) are sufficiently closed to avoid flash (also called "scrap") at the mating surface portion on the blow molded hollow plastic container product, and to ensure product quality. Devices capable of sufficiently closing a pair of half molds can be seen in the published chinese patent documents such as CN101502999B (mold clamping and locking mechanism of a hollow plastic molding machine), CN102848558B (mold clamping device of a hollow plastic product molding machine) and CN103538244B (mold clamping device structure of a hollow plastic product molding machine), and the like.
Ensuring the mold closing effect of a pair of mold halves by means of a booster cylinder is a technical means commonly used in the industry at present, and it is also seen in the published chinese patent literature that, for example, CN201339617Y recommends "a booster cylinder" and CN202789782U is provided with "a booster cylinder", etc. A typical "a booster cylinder" which can be applied to blow molding machines, injection molding machines, press machines, etc. where a large locking force is required is described in CN205298095U, the principle of boosting and releasing of this patent can be seen in paragraphs 0014 to 0017 of the specification and the technical effects described in paragraph 0018 of the specification can be objectively honored, but since the high-pressure sequence valve (i.e. "oil passage opening and closing mechanism") is free from the cylinder, the structure is loose, and the protection of the high-pressure sequence valve is not good, so there is still a need for improvement, and the technical solutions to be described below are created in this context.
Disclosure of Invention
The invention aims to provide a pressurized oil cylinder of a mold clamping device of a blow molding machine, which is beneficial to realizing excellent automatic pressurizing and automatic pressure relief effects, meeting the mold opening and closing requirements of the blow molding machine, and realizing compact structure by arranging an oil passage opening and closing mechanism for controlling the opening and closing of an oil passage between a pressurized piston oil cavity of a pressurized piston and an oil inlet cavity of a right end cover of a cylinder body of a right end cover of the cylinder body in the pressurized piston oil cavity and realizing efficient and ideal pressurizing effects by utilizing the large and small area difference between the oil inlet cavity of the right end cover of the cylinder body and a pressurized cylinder cavity of the pressurized cylinder.
The invention aims to achieve the purpose, the pressurizing cylinder of the mold closing device of the blow molding machine comprises a cylinder body, a cylinder body left end cover, a pressurizing cylinder, a cylinder body right end cover and a piston rod, wherein a cylinder body oil inlet and outlet hole is formed in the left end part of the cylinder body; the supercharging piston is arranged in a supercharging piston cavity of the right end cover of the cylinder body in a left-right moving mode and is in sealing fit with a supercharging piston cavity wall of the supercharging piston cavity, a supercharging piston column extends at the center of the left side of the supercharging piston and is in sliding fit with a supercharging cylinder cavity wall of the supercharging cylinder cavity of the supercharging cylinder in a sealing mode, the supercharging piston cavity is divided into an oil cavity positioned at the left side of the supercharging piston and a right end cover oil inlet cavity positioned at the right side of the supercharging piston by the supercharging piston, the oil cavity is communicated with the one-way valve, the end cover oil inlet and outlet hole is communicated with the right end cover oil inlet cavity, the supercharging piston top cover is fixed with the left end face of the supercharging piston column, a plurality of supercharging piston top cover oil holes are formed in the supercharging piston top cover, the supercharging piston top cover oil holes are communicated with the supercharging cylinder cavity of the supercharging piston column and are also communicated with the supercharging piston oil cavity of the supercharging piston column, and the supercharging piston oil cavity is communicated with the right end cover oil inlet cavity through the supercharging piston oil hole formed in the center position of the bottom wall of the supercharging piston oil cavity; and the oil path channel opening and closing mechanism is arranged in the pressurizing piston oil cavity at a position corresponding to the oil hole of the pressurizing piston oil cavity and is connected with the pressurizing piston top cover.
In a specific embodiment of the invention, a cylinder fixing seat is fixed on the outer wall of the left end of the cylinder and positioned on the right side of the cylinder oil inlet and outlet hole, cylinder fixing seat bolt holes are arranged on the cylinder fixing seat at intervals around the circumferential direction of the cylinder fixing seat, and a connecting column of the pressurizing cylinder is formed on the inner wall of the right end of the cylinder and is connected with internal threads in a matching way; the left end cover of the cylinder body is fixed with the left end face of the cylinder body through fixing screws of the left end cover of the cylinder body which are distributed at intervals, a left end cover cylinder body matching seat extends at the central position of the right side of the left end cover of the cylinder body, the left end cover cylinder body matching seat is inserted into the cylinder body, a left end cover outer sealing ring is embedded on the outer wall of the left end cover cylinder body matching seat, the left end cover outer sealing ring is in sealing fit with the inner wall of the cylinder body, a left end cover piston column matching hole is formed in the central position of the left end cover of the cylinder body, a plurality of left end cover inner sealing rings are embedded on the hole wall of the left end cover piston column matching hole, and the plurality of left end cover inner sealing rings are in sealing fit with the piston rod; a pressure gauge oil hole is formed in the pressure cylinder connecting column, one end of the pressure gauge oil hole is communicated with the pressure cylinder cavity, and the other end of the pressure gauge oil hole is connected with a pressure gauge in a matched mode; the right side center position of the booster cylinder is extended with a booster cylinder right sealing seat, the booster cylinder right sealing seat is inserted into the oil cavity, the outer wall of the booster cylinder right sealing seat is embedded with a booster cylinder right sealing seat sealing ring, and the booster cylinder right sealing seat sealing ring is in sealing fit with the oil cavity wall of the oil cavity.
In another specific embodiment of the present invention, the check valve includes a check valve core, a check valve spring, a spring seat and a snap ring, the check valve core is disposed in the check valve cavity, a damping hole penetrating from the left end to the right end of the check valve core is formed in the axial center of the check valve core, the check valve spring is sleeved on the check valve core, the left end of the check valve spring is supported on the left end of the check valve core, the right end of the check valve spring is supported on the spring seat, the spring seat is disposed in the check valve cavity at a position corresponding to the right end of the check valve core, and the snap ring is embedded in a snap ring groove formed on a cavity wall of the check valve cavity at a position corresponding to the right side of the spring seat.
In still another specific embodiment of the present invention, cylinder screw holes are provided on the cylinder and spaced around the cylinder, cylinder right-end cover fixing screw holes are provided on the cylinder right-end cover and at positions corresponding to the cylinder screw holes, the cylinder right-end cover fixing screw holes penetrate from the left side to the right side of the cylinder right-end cover, and cylinder right-end cover fixing screws are provided, the cylinder right-end cover fixing screws being fixed to the cylinder at positions corresponding to the cylinder screw holes.
In a further specific embodiment of the invention, a piston rear cover is fixed on the right side of the pressurizing piston through a piston rear cover screw, a guide ring is arranged on the outer wall of the piston rear cover around the circumferential direction of the piston rear cover, the guide ring is in sliding fit with the cavity wall of the pressurizing piston cavity, a guide ring sealing ring is arranged between the left side surface of the guide ring and the right side step surface of the pressurizing piston, the guide ring sealing ring is in sealing fit with the cavity wall of the pressurizing piston cavity, a pressurizing piston column sealing ring is embedded on the outer wall of the pressurizing piston column, a piston column guide ring is arranged at a position corresponding to the right side of the piston column sealing ring, the piston column sealing ring is in sealing fit with the cavity wall of the pressurizing cylinder cavity, and the piston column guiding ring is in sliding fit with the cavity wall of the pressurizing cylinder cavity.
In still another specific embodiment of the present invention, a supporting rod connecting screw hole is formed at the center position of the top cover of the pressurizing piston, and the oil path channel opening and closing mechanism disposed in the pressurizing piston oil cavity corresponding to the position of the oil passing hole of the pressurizing piston oil cavity is connected with the supporting rod connecting screw hole; the left side face of the pressurizing piston column is provided with a top cover screw hole at intervals, the pressurizing piston top cover is provided with a top cover screw hole at a position corresponding to the top cover screw hole, the top cover screw hole is provided with a top cover fixing screw, and the top cover fixing screw is fixed with the pressurizing piston column at a position corresponding to the top cover screw hole.
In a further specific embodiment of the present invention, the oil path channel opening and closing mechanism includes an opening and closing valve core, a support rod and an opening and closing valve spring, the opening and closing valve core is disposed in the pressurizing piston oil chamber in a left-right moving manner, a support rod cavity is formed at a central position of a left end of the opening and closing valve core, a core push rod extends at a central position of a right end of the opening and closing valve core, the core push rod corresponds to the pressurizing piston oil chamber oil hole, the support rod is disposed in the support rod cavity, a support rod connecting screw thread head is formed at a left end of the support rod, the support rod connecting screw thread head is in threaded connection with the support rod connecting screw hole, a support rod top extends at a right end of the support rod, the opening and closing valve spring is sleeved on the support rod top, one end of the opening and closing valve spring is supported on a step surface at a right end of the support rod, and the other end of the opening and closing valve spring is supported at a bottom of the support rod cavity.
In a further specific embodiment of the invention, a piston rod connector external thread is formed at the left end of the piston rod and at the position extending to the left side of the right end cover of the cylinder body, and the piston rod connector is in threaded connection with the piston rod connector external thread.
In a still further specific embodiment of the present invention, a connecting screw is provided at an end of the piston rod connecting head facing the piston rod, and the connecting screw locks the piston rod connecting head and the piston rod to a position extending to the left side of the cylinder right cap.
In still another specific embodiment of the present invention, the oil inlet and outlet hole of the end cover is arranged at one side of the bottom wall of the right end cover of the cylinder body in a biased manner; the area of the oil inlet cavity of the right end cover is larger than that of the pressurizing cylinder cavity.
According to one of the technical effects provided by the technical scheme, the end cover oil inlet and outlet hole is used for introducing pressure oil into the right end cover oil inlet cavity, the pressure oil sequentially enters the pressure cylinder cavity through the pressure increasing piston oil cavity oil through hole, the pressure increasing piston oil cavity and the pressure increasing piston top cover oil hole to enable the piston rod to extend towards the left end of the cylinder body, meanwhile, oil in the rod cavity is discharged to the oil tank through the cylinder body oil inlet and outlet hole, so that die assembly is completed, under the condition that continuous oil inlet of the end cover oil inlet and outlet hole is carried out, the pressure increasing piston is forced to move left, so that an oil channel opening and closing mechanism closes a channel between the pressure increasing piston oil cavity and the right end cover oil inlet cavity, the pressure increasing piston moves left to automatically increase the pressure, meanwhile, the oil in the oil cavity is sequentially discharged to the oil tank through the one-way valve and the one-way valve oil hole, and otherwise, the excellent automatic pressurizing and automatic pressure releasing effects can be reflected, and the die opening and closing requirements of a blowing machine are met; secondly, the oil passage opening and closing mechanism is arranged in the oil cavity of the pressurizing piston, so that the structure is simple and compact; and thirdly, because the area difference exists between the oil inlet cavity of the right end cover and the pressurizing cylinder cavity, the efficient and ideal pressurizing effect can be realized.
Drawings
Fig. 1 is a structural diagram of an embodiment of the present invention.
Fig. 2 is a cross-sectional view of fig. 1.
Fig. 3 is a partial detailed structural view of fig. 1 and 2.
Fig. 4 is a schematic view of the present invention applied to a plastic blowing machine.
Detailed Description
In order to make the technical spirit and advantages of the present invention more clearly understood, the applicant will now make a detailed description by way of example, but the description of the examples is not intended to limit the scope of the invention, and any equivalent transformation made merely in form, not essentially, according to the inventive concept should be regarded as the scope of the technical solution of the present invention.
In the following description, all concepts related to the directions or azimuths of the up, down, left, right, front and rear are in terms of the position states of the drawings, and thus should not be interpreted as a specific limitation on the technical solutions provided by the present invention.
Referring to fig. 1 and 2, there are shown a cylinder body 1, a cylinder body left end cap 2, a pressure cylinder 3, a cylinder body right end cap 4 and a piston rod 5, a cylinder body oil inlet and outlet hole 11 is provided at the left end side portion of the cylinder body 1, the cylinder body left end cap 2 is fixed with the left end face of the cylinder body 1, the pressure cylinder 3 is fixed with the right end of the cylinder body 1, a check valve oil hole 31 and a check valve cavity 32 are provided on the pressure cylinder 3, the check valve cavity 32 communicates with the check valve oil hole 31 and a check valve 33 is provided in the check valve cavity 32, the cylinder body right end cap 4 is connected with the pressure cylinder 3, an end cap oil inlet and outlet hole 411 is provided on the cylinder body right end cap bottom wall 41 of the cylinder body right end cap 4, the piston rod 5 is provided in the cylinder body 1 in a left-right moving manner, the left end of the piston rod 5 extends to the left side of the cylinder body left end cap 2 and is fixed with a piston rod connector 51, a piston 52 is formed at the right end of the piston rod 5, a piston seal 521 is provided on the outer wall of the piston 52, the piston seal 521 is in sealing fit with the inner wall of the cylinder body 1, a rod 12 is formed in the cylinder body 1, a piston cavity 12 is formed in the piston 52 and a piston cavity 12 is also provided on the piston 52 and a piston cap 52 is located on the piston cap 52 side of the piston rod cover 2 and is located on the piston cap 21 side of the piston cap side of the piston rod 21; a booster piston 6 and a booster piston top cover 7 are shown, the booster piston 6 is arranged in the booster piston cavity 42 of the cylinder right end cover 4 in a left-right moving way and is in sealing fit with the booster piston cavity wall of the booster piston cavity 42, a booster piston post 61 is extended at the left central position of the booster piston 6, the booster piston post 61 is in sliding fit with the booster cylinder cavity wall of the booster cylinder cavity 34 of the booster cylinder 3 in a sealing state, the booster piston 6 divides the booster piston cavity 42 into an oil cavity 421 positioned at the left side of the booster piston 6 and a right end cover oil inlet cavity 422 positioned at the right side of the booster piston 6, the oil cavity 421 is communicated with the one-way valve 33, the end cover oil inlet/outlet hole 411 is communicated with the right end cover oil inlet cavity 422, the booster piston top cover 7 is fixed with the left end face of the booster piston post 61, a plurality of booster piston top cover oil holes 71 (four in this embodiment but not limited to four) are arranged on the booster piston top cover 7, the plurality of booster piston oil cavities 71 are communicated with the booster cylinder cavity 34 and are also communicated with the booster piston top cover 611 through the left end face of the booster piston 11 at the center of the booster piston 11; an oil passage opening and closing mechanism 8 is shown, and the oil passage opening and closing mechanism 8 is provided in the aforementioned pressurizing piston oil chamber 611 at a position corresponding to the aforementioned pressurizing piston oil chamber oil passage hole 6111 and is connected to the aforementioned pressurizing piston top cover 7.
From the general knowledge and by the applicant's description in the preceding, immediately preceding paragraph: since the cylinder oil inlet and outlet hole 11 and the check valve oil hole 31 are communicated in the pipeline, the cylinder oil inlet and outlet hole 11 and the check valve oil hole 31 can be regarded as a whole, namely, regarded or understood as an oil hole, and the oil hole and the end cover oil inlet and outlet hole 411 are controlled by a hydraulic valve, when the oil hole returns, the end cover oil inlet and outlet hole 411 is filled with oil, and the same is true (the oil inlet and the oil return are realized by switching the oil passage by the hydraulic switching valve).
A cylinder fixing seat 13 is fixed on the outer wall of the left end of the cylinder 1 and positioned on the right side of the cylinder inlet and outlet hole 11, cylinder fixing seat bolt holes 1311 are arranged on the cylinder fixing seat 13 at intervals around the circumferential direction of the cylinder fixing seat 13, and a connecting column of the pressurizing cylinder is formed on the inner wall of the right end of the cylinder 1 to be connected with an internal thread 14 in a matching way; the cylinder left end cover 2 is fixed with the left end face of the cylinder 1 through a cylinder left end cover fixing screw 21 distributed at intervals (a cylinder left end cover fixing screw hole is formed on the left end face of the cylinder 1), a left end cover cylinder matching seat 22 extends at the central position of the right side of the cylinder left end cover 2, the left end cover cylinder matching seat 22 is inserted into the cylinder 1, a left end cover outer sealing ring 221 is embedded on the outer wall of the left end cover cylinder matching seat 22, the left end cover outer sealing ring 221 is in sealing fit with the inner wall of the cylinder 1, a left end cover piston column matching hole 23 is formed at the central position of the cylinder left end cover 2, a plurality of left end cover inner sealing rings 231 (three in the embodiment but not limited to three) are embedded on the wall of the left end cover piston column matching hole 23, and the plurality of left end cover inner sealing rings 231 are in sealing fit with the piston rod 5; a cylinder connecting post 35 extends at the center of the left side of the cylinder 3, a cylinder connecting post external thread 351 and a cylinder connecting post sealing ring 352 are provided on the outer wall of the cylinder connecting post 35, the cylinder connecting post external thread 351 is in threaded connection with the cylinder connecting post connecting internal thread 14, the cylinder connecting post sealing ring 352 is in sealed fit with the inner wall of the cylinder 1, a pressure gauge oil hole 353 is provided on the cylinder connecting post 35, one end of the pressure gauge oil hole 353 is communicated with the cylinder cavity 34, and the other end is connected with a pressure gauge (not shown); a right cylinder sealing seat 36 extends in the center of the right side of the cylinder 3, the right cylinder sealing seat 36 extends into the oil chamber 421, and a right cylinder sealing seat sealing ring 361 is embedded on the outer wall of the right cylinder sealing seat 36, and the right cylinder sealing seat sealing ring 361 is in sealing fit with the wall of the oil chamber 421 (shown in fig. 2).
With continued reference to fig. 1 and 2, the check valve 33 includes a check valve core 331, a check valve spring 332, a spring seat 333, and a retainer ring 334, where the check valve core 331 is disposed in the check valve cavity 32, a damping hole 3311 extending from the left end to the right end of the check valve core 331 is formed in the axial center of the check valve core 331, the check valve spring 332 is sleeved on the check valve core 331, the left end of the check valve spring 332 is supported on the left end of the check valve core 331, the right end of the check valve spring 332 is supported on the spring seat 333, the spring seat 333 is disposed in the check valve cavity 32 at a position corresponding to the right end of the check valve core 331, and the retainer ring 334 is embedded in a retainer ring groove formed in the cavity wall of the check valve cavity 32 at a position corresponding to the right side of the spring seat 333.
A cylinder screw hole 37 is provided in the cylinder 3 (i.e., on the outward flange side of the cylinder 3) and around the cylinder 3 at a distance, a cylinder right-end cover fixing screw hole 43 is provided in the cylinder right-end cover 4 at a position corresponding to the cylinder screw hole 37, the cylinder right-end cover fixing screw hole 43 penetrates from the left side to the right side of the cylinder right-end cover 4, and a cylinder right-end cover fixing screw 431 is provided, and the cylinder right-end cover fixing screw 431 is fixed to the cylinder 3 at a position corresponding to the cylinder screw hole 37.
Still referring to fig. 1 and 2 and in combination with fig. 3, a rear piston cover 62 is fixed to the right side of the aforementioned pressurizing piston 6 by a rear piston cover screw 621, and a guide ring 622 is provided on the outer wall of the rear piston cover 62 around the circumferential direction of the rear piston cover 62, the guide ring 622 is slidably fitted to the wall of the aforementioned pressurizing piston chamber 42, a guide ring seal 623 is provided between the left side surface of the guide ring 622 and the right side stepped surface of the aforementioned pressurizing piston 6, the guide ring seal 623 is sealingly fitted to the wall of the pressurizing piston chamber 42, a pressurizing piston column seal 612 is fitted to the outer wall of the aforementioned pressurizing piston column 61, and a piston column guide ring 613 is provided at a position corresponding to the right side of the piston column seal 612, the piston column seal 612 is sealingly fitted to the wall of the aforementioned pressurizing cylinder chamber 34, and the piston column guide ring 613 is slidably fitted to the wall of the pressurizing cylinder chamber 34.
Referring to fig. 3 in combination with fig. 1 and 2, a support rod connecting screw hole 72 is formed at the center of the top cover 7 of the pressurizing piston, and the oil passage opening and closing mechanism 8 disposed in the pressurizing piston oil chamber 611 corresponding to the oil passage hole 6111 of the pressurizing piston is connected to the support rod connecting screw hole 72; a top cover screw hole 614 is provided at a left side surface of the pressurizing piston column 61 at a distance, a top cover screw hole 73 is provided in the pressurizing piston top cover 7 at a position corresponding to the top cover screw hole 614, a top cover fixing screw 731 is provided in the top cover screw hole 73, and the top cover fixing screw 731 is fixed to the pressurizing piston column 61 at a position corresponding to the top cover screw hole 614.
The oil passage opening and closing mechanism 8 includes an opening and closing valve spool 81, a support rod 82 and an opening and closing valve spring 83, the opening and closing valve spool 81 is disposed in the pressurizing piston oil chamber 611 so as to move left and right, a support rod chamber 811 is formed at the center of the left end of the opening and closing valve spool 81, a spool jack 812 is extended at the center of the right end of the opening and closing valve spool 81, the spool jack 812 corresponds to the pressurizing piston oil chamber oil passage hole 6111 and extends to the left side surface of the cylinder right end cover bottom wall 41 or the left side surface of the cylinder right end cover bottom wall 41, the support rod 82 is disposed in the support rod chamber 811, the left end of the support rod 82 is formed with a support rod connecting screw head 821 which is screw-connected with the support rod connecting screw hole 72, a support rod jack 822 is extended at the right end of the support rod 82, the opening and closing valve spring 83 is sleeved on the support rod jack 822, one end of the opening and closing valve spring 83 is supported on the step surface 823 of the right end of the support rod 82, and the other end of the opening and closing valve spring 83 is supported on the bottom of the support rod chamber 811.
As shown in fig. 1 and 2, a rod connector male screw 53 is formed at the left end of the piston rod 5 and at a portion extending to the left side of the cylinder left end cover 2, and the rod connector 51 is screwed with the rod connector male screw 53.
A joint screw 511 is disposed at one end of the piston rod joint 51 facing the piston rod 5, and the joint screw 511 locks the piston rod joint 51 and the piston rod 5 to a position on the left side of the cylinder left end cover 2.
The oil inlet/outlet hole 411 is formed at one side of the bottom wall 41 of the right end cap of the cylinder; the area of the right-end-cap oil intake chamber 422 is larger than the area of the cylinder chamber 34.
Referring to fig. 4 in combination with fig. 1 to 3, a mold opening and closing mechanism 9 provided on a housing 10 is shown in fig. 4, and the mold opening and closing mechanism 9 is also called a mold opening and closing synchronization mechanism, and the applicant will not explain the mold opening and closing mechanism 9 because it belongs to the prior art, for example, see patent documents mentioned in the background section above by the applicant and also see CN101890805B and the like. In fig. 4, there are also shown left and right mold frames 20, 30 which are slidably fitted with the guide rail 101 on the base 10, and also shown a cylinder mount 40, a left mold half 201 being fixed to the side of the left mold frame 20 facing the right mold frame 30, and a right mold half 301 being fixed to the side of the right mold frame 30 facing the left mold frame 20 and in a position corresponding to the left mold half 201, the left and right mold halves 201, 301 being closed to each other so as to be referred to as mold closing, and vice versa as mold opening. The cylinder body 1 of the present invention is horizontally arranged on the booster cylinder fixing frame 40, and the piston rod connector 51 of the piston rod 5 is connected to the right side of the right die carrier 30.
During mold closing, oil enters the end cover oil inlet and outlet hole 411, the oil sequentially enters the booster cylinder cavity 34 through the right end cover oil inlet cavity 422, the booster piston oil cavity through hole 6111, the booster piston oil cavity 611 and the plurality of booster piston top cover oil holes 71 on the booster piston top cover 7, the piston 52 and the piston rod 5 are pushed to move left, when the oil in the rod cavity 12 is discharged from the cylinder body oil inlet and outlet hole 11 and is discharged to the oil tank through an oil pipe connected with the cylinder body oil inlet and outlet hole 11, after mold closing is finished, namely after mold closing is finished on the left half mold 201 and the right half mold 301, the end cover oil inlet and outlet hole 411 continues to enter the right end cover oil inlet cavity 422, the booster piston 6 is forced to move left under the pressure of the oil in the right end cover oil inlet cavity 422, at this time, the oil pressure in the oil cavity 421 enables the check valve 33 to be opened under the action of overcoming the spring force of the check valve spring 332, and the oil in the oil cavity 421 is sequentially discharged to the oil tank through the damping hole 3311 and the check valve oil hole 31 through the oil pipe connected with the check valve oil hole 31. When the booster piston 6 moves left a certain distance, the valve core plunger 812 of the valve core 81 is separated from the bottom wall 41 of the right end cap of the cylinder (the passage between the booster piston oil cavity through hole 6111 and the booster piston oil cavity 611 is opened due to the contact with the bottom wall 41 of the right end cap of the cylinder), so that the valve core 81 closes the passage between the booster piston oil cavity through hole 6111 and the booster piston oil cavity 611 under the action of the spring force of the valve spring 83, that is, closes the oil through hole 61111 (indicated in fig. 3) of the booster piston oil cavity through hole 6111. At this time, the pressurizing piston 6 continues to move leftwards, so that the pressurizing effect is achieved by utilizing the area difference between the right end cover oil inlet cavity 422 and the pressurizing cylinder cavity 34 (the area of the former is larger than that of the latter), and the left half mold 201 and the right half mold 301 are reliably closed. The pressure in the cylinder chamber 34 at this time may be revealed by a pressure gauge fitted over the aforementioned gauge oil hole 353.
When the mold is opened, specifically, when the left and right mold halves 201, 301 are required to be opened after the blow molding (blowing) of the plastic hollow container is completed, then the oil sequentially enters the oil cavity 421 through the check valve oil hole 31 and the check valve 33, forces the pressurizing piston 6 to move right, when the pressurizing piston 6 moves right to a position close to the bottom wall 41 of the right end cover of the cylinder body, the valve core ejector rod 812 of the valve core 8 of the opening and closing valve abuts against the left side surface (the surface facing the side surface of the oil inlet cavity 422 of the right end cover) of the bottom wall 41 of the right end cover of the cylinder body, the oil through hole 61111 (shown in fig. 3) is opened, the oil continues to enter the oil through the check valve oil hole 31, and the oil in the pressurizing cylinder cavity 34 sequentially enters the oil inlet cavity 422 of the right end cover through the pressurizing piston top cover oil hole 71, the pressurizing piston oil cavity 611, the oil through hole 61111 and the pressurizing piston oil through hole through 6111 and returns to the oil tank from the end cover oil inlet and outlet 411, and the mold opening is completed.
In summary, the technical scheme provided by the invention overcomes the defects in the prior art, successfully completes the task of the invention, and faithfully honors the technical effects carried by the applicant in the technical effect column above.
Claims (10)
1. A booster cylinder of a mold closing device of a blow molding machine is characterized by comprising a cylinder body (1), a cylinder body left end cover (2), a booster cylinder (3), a cylinder body right end cover (4) and a piston rod (5), wherein a cylinder body oil inlet and outlet hole (11) is formed in the left end side part of the cylinder body (1), the cylinder body left end cover (2) is fixed with the left end face of the cylinder body (1), the booster cylinder (3) is fixed with the right end of the cylinder body (1), a check valve oil hole (31) and a check valve cavity (32) are formed in the booster cylinder (3), the check valve cavity (32) is communicated with the check valve oil hole (31), a check valve (33) is formed in the check valve cavity (32), the cylinder body right end cover (4) is connected with the booster cylinder (3), an end cover oil inlet and outlet hole (411) is formed in the bottom wall (41) of the cylinder body right end cover (4), the piston rod (5) is arranged in the cylinder body (1) in a left-right moving mode, the left end of the piston rod (5) extends to the left side of the cylinder body left end cover (2) and is fixed with a connector (32), the check valve cavity (52) is formed in the left end of the cylinder body left end cover (2), the piston rod (5) is matched with the piston (52) on the outer wall (52) of the piston (52), a rod cavity (12) is formed in the cylinder body (1) by the piston (52), and the rod cavity (12) is positioned at the left side of the piston (52) and is communicated with the cylinder body oil inlet and outlet hole (11); a pressurizing piston (6) and a pressurizing piston top cover (7), the pressurizing piston (6) is arranged in the pressurizing piston cavity (42) of the right end cover (4) of the cylinder body in a left-right moving way and is in sealing fit with the pressurizing piston cavity wall of the pressurizing piston cavity (42), a pressurizing piston post (61) is extended at the center position of the left side of the pressurizing piston (6), the pressurizing piston post (61) is in sliding fit with the pressurizing cylinder cavity wall of the pressurizing cylinder cavity (34) of the pressurizing cylinder (3) in a sealing state, the pressurizing piston (6) divides the pressurizing piston cavity (42) into an oil cavity (421) positioned at the left side of the pressurizing piston (6) and a right end cover oil inlet cavity (422) positioned at the right side of the pressurizing piston (6), the oil cavity (421) is communicated with the one-way valve (33), the oil inlet and outlet hole (411) is communicated with the right end cover oil inlet cavity (422), the pressurizing piston top cover (7) is fixed with the left end face of the pressurizing piston post (61), a plurality of top covers (71) are arranged on the pressurizing piston top cover (7), the plurality of top covers (71) are communicated with the pressurizing piston cavity (71) and the pressurizing piston cavity (71), the supercharging piston oil cavity (611) is communicated with the right end cover oil inlet cavity (422) through a supercharging piston oil cavity oil through hole (6111) arranged at the center position of the bottom wall of the supercharging piston oil cavity (611); and the oil passage opening and closing mechanism (8) is arranged in the pressurizing piston oil cavity (611) at a position corresponding to the oil through hole (6111) of the pressurizing piston oil cavity and is connected with the pressurizing piston top cover (7).
2. The booster cylinder of a mold clamping device of a blow molding machine according to claim 1, characterized in that a cylinder fixing seat (13) is fixed on the outer wall of the left end of the cylinder (1) and positioned on the right side of the cylinder oil inlet and outlet hole (11), cylinder fixing seat bolt holes (1311) are arranged on the cylinder fixing seat (13) and are spaced around the circumferential direction of the cylinder fixing seat (13), and booster cylinder connecting post matching internal threads (14) are formed on the inner wall of the right end of the cylinder (1); the cylinder body left end cover (2) is fixed with the left end face of the cylinder body (1) through cylinder body left end cover fixing screws (21) which are distributed at intervals, a left end cover cylinder body matching seat (22) is extended at the central position of the right side of the cylinder body left end cover (2), the left end cover cylinder body matching seat (22) is inserted into the cylinder body (1), a left end cover outer sealing ring (221) is embedded on the outer wall of the left end cover cylinder body matching seat (22), the left end cover outer sealing ring (221) is in sealing fit with the inner wall of the cylinder body (1), a left end cover piston column matching hole (23) is formed in the central position of the cylinder body left end cover (2), a plurality of left end cover inner sealing rings (231) are embedded on the hole wall of the left end cover piston column matching hole (23), and the plurality of left end cover inner sealing rings (231) are in sealing fit with the piston rod (5); a booster cylinder connecting column (35) extends at the center of the left side of the booster cylinder (3), a booster cylinder connecting column external thread (351) and a booster cylinder connecting column sealing ring (352) are arranged on the outer wall of the booster cylinder connecting column (35), the booster cylinder connecting column external thread (351) is in threaded fit with the booster cylinder connecting column matching internal thread (14), the booster cylinder connecting column sealing ring (352) is in sealed fit with the inner wall of the cylinder body (1), a pressure gauge oil hole (353) is formed in the booster cylinder connecting column (35), one end of the pressure gauge oil hole (353) is communicated with the booster cylinder cavity (34), and the other end of the pressure gauge oil hole is matched with a pressure gauge; a right sealing seat (36) of the booster cylinder extends at the right center of the booster cylinder (3), the right sealing seat (36) of the booster cylinder is inserted into the oil cavity (421), a sealing ring (361) of the right sealing seat of the booster cylinder is embedded on the outer wall of the right sealing seat (36) of the booster cylinder, and the sealing ring (361) of the right sealing seat of the booster cylinder is in sealing fit with the wall of the oil cavity (421).
3. The booster cylinder of a mold clamping device of a blow molding machine according to claim 1, wherein the check valve (33) comprises a check valve core (331), a check valve spring (332), a spring seat (333) and a retainer ring (334), the check valve core (331) is disposed in the check valve cavity (32), a damping hole (3311) penetrating from the left end to the right end of the check valve core (331) is formed in the axial center of the check valve core (331), the check valve spring (332) is sleeved on the check valve core (331), the left end of the check valve spring (332) is supported on the left end of the check valve core (331), the right end of the check valve spring (332) is supported on the spring seat (333), the spring seat (333) is disposed in the check valve cavity (32) at a position corresponding to the right end of the check valve core (331), and the retainer ring (334) is embedded in a retainer ring groove formed in a cavity wall of the check valve cavity (32).
4. The pressure cylinder of a mold clamping device of a blow molding machine according to claim 1, characterized in that a pressure cylinder screw hole (37) is provided on the pressure cylinder (3) and spaced around the circumference of the pressure cylinder (3), a cylinder right end cover fixing screw hole (43) is provided on the cylinder right end cover (4) and at a position corresponding to the pressure cylinder screw hole (37), the cylinder right end cover fixing screw hole (43) penetrates from the left side to the right side of the cylinder right end cover (4), and a cylinder right end cover fixing screw (431) is provided, and the cylinder right end cover fixing screw (431) is fixed with the pressure cylinder (3) at a position corresponding to the pressure cylinder screw hole (37).
5. The pressure cylinder of a mold clamping device of a blow molding machine according to claim 1, characterized in that a piston rear cover (62) is fixed on the right side of the pressure piston (6) by a piston rear cover screw (621) and a guide ring (622) is provided on the outer wall of the piston rear cover (62) around the circumferential direction of the piston rear cover (62), the guide ring (622) is in sliding fit with the cavity wall of the pressure cylinder cavity (42), a guide ring seal ring (623) is provided between the left side surface of the guide ring (622) and the right side step surface of the pressure piston (6), the guide ring seal ring (623) is in sealing fit with the cavity wall of the pressure piston cavity (42), a pressure piston column seal ring (612) is embedded on the outer wall of the pressure piston column (61), and a piston column guide ring (613) is provided on the position corresponding to the right side of the piston column seal ring (612), the piston column seal ring (612) is in sealing fit with the cavity wall of the pressure cylinder cavity (34), and the piston column seal ring (613) is in sliding fit with the cavity wall of the pressure cylinder cavity (34).
6. The booster cylinder of the mold closing device of the blow molding machine according to claim 1, characterized in that a supporting rod connecting screw hole (72) is formed in the center position of the booster piston top cover (7), and the oil path channel opening and closing mechanism (8) arranged in the booster piston oil cavity (611) corresponding to the position of the booster piston oil cavity oil through hole (6111) is connected with the supporting rod connecting screw hole (72); a top cover screw hole (614) is formed in the left side surface of the pressurizing piston column (61) at intervals, a top cover screw hole (73) is formed in the pressurizing piston top cover (7) at a position corresponding to the top cover screw hole (614), a top cover fixing screw (731) is arranged on the top cover screw hole (73), and the top cover fixing screw (731) is fixed with the pressurizing piston column (61) at a position corresponding to the top cover screw hole (614).
7. The pressurized cylinder of a mold closing device of a blow molding machine according to claim 6, wherein the oil passage opening and closing mechanism (8) comprises an opening and closing valve core (81), a support rod (82) and an opening and closing valve spring (83), the opening and closing valve core (81) is disposed in the pressurized piston oil chamber (611) in a laterally movable manner, a support rod cavity (811) is formed at a central position of a left end of the opening and closing valve core (81), a valve core jack (812) is extended at a central position of a right end of the opening and closing valve core (81), the valve core jack (812) corresponds to the pressurized piston oil chamber oil hole (6111), the support rod (82) is disposed in the support rod cavity (811), a support rod connecting screw head (821) is formed at a left end of the support rod (82), the support rod connecting screw head (821) is in screw connection with the support rod connecting screw hole (72), a support rod jack (822) is extended at a right end of the support rod (82), the opening and closing valve spring (83) is sleeved on the support rod jack (822), one end of the opening and closing valve spring (83) is supported on a right end of the support rod cavity (823) of the support rod cavity (811), and the opening and closing valve spring (83) is supported on the bottom of the support rod cavity (823).
8. The pressurized cylinder of a mold clamping device of a blow molding machine according to claim 1, characterized in that a piston rod connector external thread (53) is formed at the left end of the piston rod (5) and at a position extending to the left side of the left end cover (2) of the cylinder body, and the piston rod connector (51) is in threaded connection with the piston rod connector external thread (53).
9. The booster cylinder of a mold clamping device of a blow molding machine according to claim 1 or 8, characterized in that a joint screw (511) is provided at an end of the piston rod joint (51) facing the piston rod (5), and the joint screw (511) locks the piston rod joint (51) and the piston rod (5) to a position on the left side of the cylinder left end cover (2).
10. The booster cylinder of the mold closing device of the blow molding machine according to claim 1, wherein the end cover oil inlet and outlet hole (411) is arranged at one side of the bottom wall (41) of the right end cover of the cylinder body in a biased manner; the area of the right end cover oil inlet cavity (422) is larger than the area of the booster cylinder cavity (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810883108.8A CN108730243B (en) | 2018-08-06 | 2018-08-06 | Pressurized cylinder of mould closing device of blow molding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810883108.8A CN108730243B (en) | 2018-08-06 | 2018-08-06 | Pressurized cylinder of mould closing device of blow molding machine |
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| Publication Number | Publication Date |
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| CN108730243A CN108730243A (en) | 2018-11-02 |
| CN108730243B true CN108730243B (en) | 2023-06-30 |
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| CN201810883108.8A Active CN108730243B (en) | 2018-08-06 | 2018-08-06 | Pressurized cylinder of mould closing device of blow molding machine |
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| CN116658470B (en) * | 2023-07-28 | 2023-10-03 | 烟台核信环保设备有限公司 | Supercharger and self-supercharging oil cylinder |
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| CN104806810A (en) * | 2014-01-26 | 2015-07-29 | 上海华林工业气体有限公司 | Straight guide ring piston sealing structure for regulating valve |
| CN105909591A (en) * | 2016-06-15 | 2016-08-31 | 苏州同大机械有限公司 | Fast mold opening and closing oil cylinder structure of plastic product forming machine |
| CN208651297U (en) * | 2018-08-06 | 2019-03-26 | 苏州同大机械有限公司 | The pressurizing cylinder of blow moulding machine mould clamping device |
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2018
- 2018-08-06 CN CN201810883108.8A patent/CN108730243B/en active Active
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| AU3464784A (en) * | 1983-11-10 | 1985-05-16 | Societe Anonyme D.B.A. | Hydraulic amplifier for braking system |
| JP2008133858A (en) * | 2006-11-27 | 2008-06-12 | Toyooki Kogyo Co Ltd | Hydraulic cylinder with booster |
| CN101074690A (en) * | 2007-06-26 | 2007-11-21 | 中国地质大学（武汉） | Automatically-reciprocating hydraulic cylinder |
| CN101629591A (en) * | 2009-06-30 | 2010-01-20 | 常州市瑞泰工程机械有限公司 | Pressurizing cylinder |
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