CN107471570B - Hybrid power driving cylinder capable of amplifying multiple driving force - Google Patents
Hybrid power driving cylinder capable of amplifying multiple driving force Download PDFInfo
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- CN107471570B CN107471570B CN201710489767.9A CN201710489767A CN107471570B CN 107471570 B CN107471570 B CN 107471570B CN 201710489767 A CN201710489767 A CN 201710489767A CN 107471570 B CN107471570 B CN 107471570B
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/68—Mould opening, closing or clamping devices hydro-mechanical
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/68—Mould opening, closing or clamping devices hydro-mechanical
- B29C2045/685—Mould opening, closing or clamping devices hydro-mechanical using mechanical drive means for mould closing to obtain the hydraulic clamping pressure
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
A hybrid drive cylinder capable of amplifying multiple drive forces, characterized in that: the high-pressure sleeve is arranged in the low-pressure sleeve, and a first sealing guide sleeve and a second sealing guide sleeve are arranged between the cylindrical surface of the high-pressure sleeve and the inner hole of the low-pressure sleeve, so that the high-pressure sleeve can axially move relative to the low-pressure sleeve; the first sealing guide sleeve, the second sealing guide sleeve, the low-pressure sleeve and the high-pressure sleeve form a sealed low-pressure oil cavity, and the low-pressure piston arranged on the cylindrical surface of the high-pressure sleeve divides the oil cavity into a low-pressure driving cavity and a low-pressure oil return cavity. The beneficial effects of the invention are as follows: according to Pascal's law, utilize the high-pressure piston that effective area is little to promote the motion of effective area big low pressure piston, consequently drive the lead screw only need provide less thrust, just can make low pressure piston cylinder produce great pressure and supply the mode locking to use.
Description
Technical Field
The invention relates to the technical field of blow molding machines, in particular to a hybrid power driving cylinder capable of amplifying multiple driving forces.
Background
At present, injection molding machines and blow molding machines used at home and abroad are commonly in a toggle rod locking mode, a hydraulic locking mode and the like, the injection molding machines using the toggle rod mechanisms lock the mold by utilizing elastic deformation force of the hinged toggle rods when the toggle rods are straightened, and as the hinged toggle rods and the hinged points are more, equal stress length cannot be ensured during manufacturing and assembly, a large amount of lubricating oil and a complex lubricating system are required, the long running time easily causes abrasion, and causes unbalanced structure, the difference of stress lengths of the toggle rods at two sides is enlarged, and the abrasion is accelerated, thereby forming vicious cycle, causing the creeping phenomenon of the movable mold plate opening and closing mold, being difficult to ensure the symmetry of a cavity during mold opening and closing, being easy to damage the mold, and the mold locking force is concentrated at one point on the movable mold plate during mold locking, being easy to lead the mold to be unevenly stressed and produce expanding mold, influencing the molding quality of plastic products.
The hydraulic mode is provided with a single-cylinder mode locking and a multi-cylinder mode locking, the mode locking force of the single-cylinder mode locking is still concentrated on one point, and the stress of the die is uneven; the multi-cylinder mold locking is generally provided with four mold locking cylinders, the mold locking force can uniformly act on four corners of the movable mold plate, the mold locking force is uniformly distributed by utilizing the principle that the hydraulic pressure is equal everywhere, the mold can be effectively protected, the pressure can be freely regulated, the molding precision and the internal quality of plastic products are ensured, and the advantages are particularly obvious in the precise injection molding technology and even the multi-cylinder mold locking device can be used for the optical disk injection molding technology. The mold locking cylinder has the defects that the mold locking cylinder has extremely high requirements on sealing conditions, oil leakage, pressure relief and other phenomena are easy to generate in the mold locking, the mold locking force is insufficient, therefore, the processing difficulty of parts is high, the cost is high, the assembly and maintenance are difficult, the larger the mold locking force is, the larger the radius of the required mold locking cylinder is, the more difficult the sealing is, the more difficult the control of an oil way is, the more hydraulic oil is used, the mass of the oil cylinder is increased, the more the moving mass is, the more power is required for frequent mold opening and closing movement, the more power is required, the mold locking cylinder is difficult to apply to a large-tonnage injection molding machine, meanwhile, the maximum stroke of a movable mold plate can only reach the length of the mold locking cylinder, the longer the stroke is required to ensure that the longer the moving mass is, the operation speed is influenced by the reciprocating frequent movement of the hydraulic oil in the mold opening and closing process, the oil temperature is easy to rise, the aging of a sealing ring is accelerated, and a large amount of waste hydraulic oil can cause serious environmental pollution when the machine is scrapped.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the hybrid power driving cylinder capable of amplifying multiple driving force, which has the advantages of simple structure, low production cost, large mold locking force, high mold opening and closing speed and stable and efficient work.
The invention aims at realizing the following modes: a hybrid drive cylinder capable of amplifying multiple drive forces, characterized in that: the high-pressure sleeve is arranged in the low-pressure sleeve, and a first sealing guide sleeve and a second sealing guide sleeve are arranged between the cylindrical surface of the high-pressure sleeve and the inner hole of the low-pressure sleeve, so that the high-pressure sleeve can axially move relative to the low-pressure sleeve;
the first sealing guide sleeve, the second sealing guide sleeve, the low-pressure sleeve and the high-pressure sleeve form a sealed low-pressure oil cavity, and the low-pressure piston arranged on the cylindrical surface of the high-pressure sleeve divides the oil cavity into a low-pressure driving cavity and a low-pressure oil return cavity;
the high-pressure oil cavity is arranged in the high-pressure sleeve, the high-pressure piston divides the high-pressure oil cavity into a high-pressure driving cavity and a high-pressure oil return cavity, a piston rod is arranged on the high-pressure piston and is connected with a driving screw rod arranged at the tail end of the low-pressure sleeve, the driving screw rod is driven by a driving motor to rotate, and when the driving screw rod rotates, the piston rod drives the high-pressure piston to move relative to the high-pressure sleeve or the low-pressure sleeve;
the high-pressure driving cavity is connected with the low-pressure driving cavity through a high-pressure oil pipe, and a high-pressure control valve is arranged on the high-pressure oil pipe; a low-pressure oil pipe is arranged between the low-pressure driving cavity and the low-pressure oil return cavity, and a low-pressure control valve is arranged on the low-pressure oil pipe; the high-pressure oil return cavity is connected with the low-pressure oil return cavity through an oil return groove.
The oil return groove is arranged on the high-pressure sleeve and is communicated with the inside and the outside of the high-pressure sleeve.
The driving motor is connected with the driving screw rod through a converter.
The driving motor is a servo motor or a stepping motor.
The top end of the high-pressure sleeve is provided with a connecting lug which extends out of the sleeve.
The beneficial effects of the invention are as follows: 1. simple structure, convenient assembly, low production cost and market competitiveness improvement. 2. When the motor is used for driving the screw rod to rotate, the high-pressure sleeve can be directly driven to rapidly move, the rapid opening and closing of the die can be realized, and the production efficiency is improved. 3. According to Pascal's law, utilize the high-pressure piston that effective area is little to promote the motion of effective area big low pressure piston, consequently drive the lead screw only need provide less thrust, just can make low pressure piston cylinder produce great pressure and supply the mode locking to use.
Drawings
FIG. 1 is a schematic view of the present invention in a retracted state.
FIG. 2 is a schematic view of the structure of the present invention in an extended state.
Detailed Description
The invention is described in more detail below with reference to the accompanying drawings. A hybrid drive cylinder capable of amplifying multiple drive forces, characterized in that: the high-pressure sleeve 2 is arranged in the low-pressure sleeve 1, and a first sealing guide sleeve 3 and a second sealing guide sleeve 4 are arranged between the cylindrical surface of the high-pressure sleeve 2 and the inner hole of the low-pressure sleeve 1, so that the high-pressure sleeve 2 can axially move relative to the low-pressure sleeve 1;
the first sealing guide sleeve 3 and the second sealing guide sleeve 4 form a sealed low-pressure oil cavity among the low-pressure sleeve 1 and the high-pressure sleeve 2, and the low-pressure piston 5 arranged on the cylindrical surface of the high-pressure sleeve 2 divides the oil cavity into a low-pressure driving cavity 51 and a low-pressure oil return cavity 52;
the high-pressure sleeve is internally provided with a high-pressure oil cavity, the high-pressure piston 6 divides the high-pressure oil cavity into a high-pressure driving cavity 61 and a high-pressure oil return cavity 62, a piston rod 63 is arranged on the high-pressure piston 6 and is connected with a driving screw rod 7 arranged at the tail end of the low-pressure sleeve 1, the driving screw rod 7 is driven to rotate by a driving motor 71, and when the driving screw rod 7 rotates, the high-pressure piston 6 is driven to move relative to the high-pressure sleeve 2 or the low-pressure sleeve 1 through the piston rod 63;
the high-pressure driving cavity 61 is connected with the low-pressure driving cavity 51 through a high-pressure oil pipe 8, and a high-pressure control valve 81 is arranged on the high-pressure oil pipe 8; a low-pressure oil pipe 9 is arranged between the low-pressure driving cavity 51 and the low-pressure oil return cavity 52, and a low-pressure control valve 91 is arranged on the low-pressure oil pipe 9; the high-pressure oil return cavity 62 is connected with the low-pressure oil return cavity 52 through an oil return groove 93.
The oil return groove 93 is arranged on the high-pressure sleeve 2 and is communicated with the inside and the outside of the high-pressure sleeve 2.
The driving motor 71 is connected with the driving screw rod 7 through a converter 72.
The driving motor 71 is a servo motor or a stepping motor.
The top end of the high-pressure sleeve 2 is provided with a connecting lug 21, and the connecting lug 21 extends out of the sleeve.
Working principle: as shown in FIG. 1, the structure is in an effect diagram of a retracted state, and in the state, the high-pressure piston and the low-pressure piston are both offset to one side of the driving motor, so that the connecting lugs are in the retracted state. When the device is applied to the mold locking of a blow molding machine, the state is a mold opening state.
When the connecting lug 21 is required to extend to provide driving force, as shown in figure 2, the driving motor drives the screw rod to rotate, so that the screw rod is driven to move rightwards when the blowing machine is in die assembly. At this time, the high pressure control valve 81 is closed, and the low pressure control valve 91 is opened. When the screw rod moves rightwards, acting force acts on the high-pressure piston 6, and the high-pressure control valve 81 is closed, so that the high-pressure piston 6 drives the high-pressure sleeve 2 to move outwards rapidly through hydraulic oil, and when the high-pressure sleeve 2 moves, the low-pressure piston 5 is driven to move rightwards, and at the moment, the hydraulic oil located in the low-pressure oil return cavity 52 flows back to the low-pressure driving cavity 51 through the low-pressure oil pipe 9. Because the motion at this moment is directly transmitted to high-pressure sleeve and engaging lug by the lead screw, therefore it has faster driving speed compared with traditional hydro-cylinder direct drive mode to reduce the compound die time, improve compound die efficiency.
When the mold is required to be locked, a system is required to provide larger pressure to resist the expansion force in the mold, so that the diameter of a driving oil cylinder in the prior art is required to be very large, the mold opening and closing speed is low, and the working efficiency is low. For this, when the structure in this case requires mode locking: the low-pressure control valve 91 is closed, the high-pressure control valve 81 is opened, the driving motor drives the screw rod to continuously move rightwards, the high-pressure piston 6 is pushed to move rightwards, hydraulic oil in the high-pressure driving cavity enters the low-pressure driving cavity 51 through the high-pressure pipeline, and the entered hydraulic oil is used for driving the low-pressure piston and the high-pressure sleeve to move rightwards to provide die locking power. And the hydraulic oil in the low-pressure oil return chamber 52 flows back into the high-pressure oil return chamber 62 through the oil return groove 93. According to pascal's law, the effective area of the piston of the high-pressure piston 6 in this case is smaller than the effective area of the low-pressure piston 5. Therefore, the driving screw rod only needs to provide smaller thrust for the high-pressure piston, so that the low-pressure piston 5 can generate larger pressure to push the high-pressure sleeve 2 barrel to move outwards, and larger power is provided for locking the die.
And at the time of die opening, the low pressure control valve 91 is opened, and the high pressure control valve 81 is opened to release pressure for the system. The driving motor drives the screw rod to reversely move, so that when the high-pressure piston 6 moves leftwards to a seat stop point, the power for driving the screw rod is directly transmitted to the high-pressure sleeve 2, and the high-pressure sleeve 2 is driven to reset, so that the quick die opening of the die is realized.
Compared with the prior art, the die opening and closing device has the advantages that the die opening and closing device can meet the use requirement by only providing smaller power in the opening and closing process of the die, so that the screw rod driving device is utilized to provide faster die opening and closing speed, and the working efficiency of equipment is improved. The technical defects of low action speed, high power requirement on a hydraulic system, high working loss and the like of simple hydraulic driving in the traditional technology are avoided. In the mold locking process, the driving device is required to provide larger pressure for the mold, so that the high-pressure piston with small effective acting area is arranged to drive the low-pressure piston to move according to Pascal law in the scheme, and enough mold locking power is provided for the mold. Therefore, the screw rod driving and the hydraulic driving are skillfully combined, so that the use requirement of rapid mold opening and closing is met, and meanwhile, enough power is provided for mold locking, so that the mold opening and closing device can be widely applied to equipment such as injection molding machines, bottle blowing machines and the like which need to repeatedly open and close the mold. In addition, the high-pressure sleeve is arranged in the low-pressure sleeve, the driving screw rod is arranged in the high-pressure sleeve, and the three-layer coating structure has the advantages of simple structure, compact layout, high working efficiency and the like, meanwhile, the rotating part is hidden in the equipment, one side of the rotating part is prevented from easily winding operator clothes, equipment cables and the like when the screw rod rotates, and the screw rod is protected, so that the stability of the work of the screw rod is prevented from being influenced by dust accumulation, sundries and the like when the screw rod is exposed in the air for a long time, and the screw rod can be widely popularized and used.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be appreciated by those skilled in the art that the present invention is not limited to the above embodiments, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention, such as screw drive, high pressure, low pressure mounting arrangements, etc., which are within the scope of the invention as claimed.
Claims (5)
1. A hybrid drive cylinder capable of amplifying multiple drive forces, characterized in that: the high-pressure sleeve (2) is arranged in the low-pressure sleeve (1), and a first sealing guide sleeve (3) and a second sealing guide sleeve (4) are arranged between the cylindrical surface of the high-pressure sleeve (2) and the inner hole of the low-pressure sleeve (1), so that the high-pressure sleeve (2) can axially move relative to the low-pressure sleeve (1);
the first sealing guide sleeve (3) and the second sealing guide sleeve (4) form a closed low-pressure oil cavity between the low-pressure sleeve (1) and the high-pressure sleeve (2), and the low-pressure piston (5) arranged on the cylindrical surface of the high-pressure sleeve (2) divides the oil cavity into a low-pressure driving cavity (51) and a low-pressure oil return cavity (52);
the high-pressure oil cavity is arranged in the high-pressure sleeve (2), the high-pressure piston (6) divides the high-pressure oil cavity into a high-pressure driving cavity (61) and a high-pressure oil return cavity (62), a piston rod (63) is arranged on the high-pressure piston (6) and is connected with a driving screw rod (7) arranged at the tail end of the low-pressure sleeve (1), the driving screw rod (7) is driven to rotate by a driving motor (71), and when the driving screw rod (7) rotates, the high-pressure piston (6) is driven to move relative to the high-pressure sleeve (2) or the low-pressure sleeve (1) through the piston rod (63);
the high-pressure driving cavity (61) is connected with the low-pressure driving cavity (51) through a high-pressure oil pipe (8), and a high-pressure control valve (81) is arranged on the high-pressure oil pipe (8); a low-pressure oil pipe (9) is arranged between the low-pressure driving cavity (51) and the low-pressure oil return cavity (52), and a low-pressure control valve (91) is arranged on the low-pressure oil pipe (9); the high-pressure oil return cavity (62) is connected with the low-pressure oil return cavity (52) through an oil return groove (93).
2. A hybrid drive cylinder capable of amplifying multiple drive forces according to claim 1, wherein: the oil return groove (93) is arranged on the high-pressure sleeve (2) and is communicated with the inside and the outside of the high-pressure sleeve (2).
3. A hybrid drive cylinder capable of amplifying multiple drive forces according to claim 1, wherein: the driving motor (71) is connected with the driving screw rod (7) through a converter (72).
4. A hybrid drive cylinder capable of amplifying multiple drive forces according to claim 1, wherein: the driving motor (71) is a servo motor or a stepping motor.
5. A hybrid drive cylinder capable of amplifying multiple drive forces according to claim 1, wherein: the top end of the high-pressure sleeve (2) is provided with a connecting lug (21), and the connecting lug (21) extends out of the sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710489767.9A CN107471570B (en) | 2017-06-24 | 2017-06-24 | Hybrid power driving cylinder capable of amplifying multiple driving force |
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| CN201710489767.9A CN107471570B (en) | 2017-06-24 | 2017-06-24 | Hybrid power driving cylinder capable of amplifying multiple driving force |
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| CN107471570A CN107471570A (en) | 2017-12-15 |
| CN107471570B true CN107471570B (en) | 2023-09-29 |
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| CN201710489767.9A Active CN107471570B (en) | 2017-06-24 | 2017-06-24 | Hybrid power driving cylinder capable of amplifying multiple driving force |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109114067A (en) * | 2018-09-21 | 2019-01-01 | 仁兴机械（佛山）有限公司 | A kind of cylinder, cylinder structure |
| CN109732880A (en) * | 2019-02-20 | 2019-05-10 | 广州达意隆包装机械股份有限公司 | A kind of bottle blowing machine core-pulling device pressure control mechanism |
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| CN107471570A (en) | 2017-12-15 |
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