CN109454798B - Pressurizing mechanism for establishing compression molding movable mold plate mold locking force - Google Patents
Pressurizing mechanism for establishing compression molding movable mold plate mold locking force Download PDFInfo
- Publication number
- CN109454798B CN109454798B CN201910009886.9A CN201910009886A CN109454798B CN 109454798 B CN109454798 B CN 109454798B CN 201910009886 A CN201910009886 A CN 201910009886A CN 109454798 B CN109454798 B CN 109454798B
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- pressurizing
- cylinder
- compression molding
- oil
- compression
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- 238000000748 compression moulding Methods 0.000 title claims abstract description 53
- 230000007246 mechanism Effects 0.000 title claims abstract description 29
- 238000003825 pressing Methods 0.000 claims abstract description 57
- 230000006835 compression Effects 0.000 claims abstract description 39
- 238000007906 compression Methods 0.000 claims abstract description 39
- 238000001125 extrusion Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 12
- 238000009423 ventilation Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 71
- 230000006872 improvement Effects 0.000 description 7
- 239000010720 hydraulic oil Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000012994 industrial processing Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010057 rubber processing Methods 0.000 description 1
Classifications
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
Abstract
The invention discloses a pressurizing mechanism for establishing a compression molding movable template mold locking force, which comprises a movable template and a compression mold arranged on the movable template, wherein a compression cylinder is arranged on the movable template, a compression piston rod for providing the mold locking force is arranged in the compression cylinder, the top of the compression piston rod penetrates through the compression cylinder and extends to a pressurizing positioning bolt, the pressurizing positioning bolt is movably arranged on a frame and is connected with a power mechanism capable of driving the pressurizing positioning bolt to move left and right, the compression cylinder is simultaneously connected with the pressurizing cylinder and a pre-pressing cylinder through an oil pipe, a switch valve is arranged between the pre-pressing cylinder and the compression cylinder and between the pre-pressing cylinder and the pressurizing cylinder, the pressurizing cylinder is internally provided with a pressurizing piston rod, and the top of the pressurizing piston rod penetrates through the pressurizing cylinder and is connected with a pressure mechanism capable of generating extrusion force. The invention has simple supercharging principle, the simple prepressing and supercharging device can obtain high oil pressure, and the whole mechanism has simple structure, reduces the manufacturing difficulty of the device and is convenient for maintenance.
Description
Technical Field
The invention relates to a capping machine structure in the field of plastic machinery, in particular to a pressurizing mechanism for establishing a compression molding movable mold plate clamping force.
Background
Compression molding is an abbreviation for compression molding, also called compression molding. A plastic processing (also rubber processing) method in which plastic or rubber compounds are formed into articles by heat and pressure in a closed mold cavity. The method is an important technical process in forming processing, has wide application in industrial production and industrial processing, and plays an important role in people's life. And the pressurizing device for pressurizing is more important in molding, and directly influences the molding effect. Most of the prior bottle cap compression molding is single bottle cap compression molding or simultaneous compression molding of a plurality of bottle caps, the production efficiency is lower, and the pressure is insufficient when the prior bottle cap compression molding is used for compressing a plurality of molds.
Therefore, aiming at the defects of the existing compression molding pressurizing mechanism, the compression molding pressurizing mechanism is developed, which has the advantages of high pressure, high production efficiency, low failure rate, stability and reliability, and has important significance for the development of the compression molding industry.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a pressurizing mechanism for establishing the clamping force of a compression molding movable mold plate, so as to solve the problems of low production efficiency, insufficient pressure, poor stability and the like commonly existing in the conventional compression molding.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a establish booster mechanism of compression moulding movable mould board clamping force, includes the movable mould board and sets up the compression mould on the movable mould board, be equipped with compression cylinder on the movable mould board, be equipped with the compression piston rod that is used for providing the clamping force in the compression cylinder, compression piston rod top passes compression cylinder and extends to the pressurization locating bolt, pressurization locating bolt movable mounting is in the frame and be connected with a power unit that can drive its side-to-side movement, compression cylinder passes through oil pipe and is connected with pressurization cylinder and pre-compaction cylinder simultaneously, be equipped with the ooff valve between pre-compaction cylinder and compression cylinder and the pressurization cylinder, the pressurization cylinder is installed on the movable mould board, be equipped with the pressurization piston rod in the pressurization cylinder, the top of pressurization piston rod passes the pressurization cylinder and is connected with a pressure mechanism that can produce the extrusion force.
As a further improvement of the invention, the pressure mechanism is a booster cylinder.
As a further improvement of the invention, the pressurizing piston rod comprises a pressurizing piston and a pressurizing rod, the stressed area of one end is larger than that of the other end, and one end with larger stressed area is positioned in the pressurizing cylinder.
As a further improvement of the invention, the booster cylinder comprises a booster cylinder, a booster cylinder cover, a booster piston rod and a pull rod sealing seat.
As a further improvement of the invention, the upper part and the lower part of the pressurizing piston are both provided with bosses for ventilation.
As a further improvement of the invention, a reset spring is arranged in the compression molding cylinder.
As a further improvement of the invention, the pre-pressing oil cylinder comprises a pre-pressing cylinder, a pre-pressing cylinder cover, a pre-pressing cylinder piston, a pre-pressing screw rod and a pre-pressing screw rod pressing plate.
As a further improvement of the invention, the bottom of the movable mould plate is provided with an oil guide plate which can be communicated with an oil path.
The beneficial effects of the invention are as follows: the invention has simple supercharging principle, the simple prepressing and supercharging device can obtain high oil pressure, and the whole mechanism has simple structure, reduces the manufacturing difficulty of the device and is convenient for maintenance. When the die is locked, the pressurizing positioning bolt stretches out to prop against the top of the compression molding piston rod, then the upper air cavity of the pressurizing air cylinder is used for air inflow and generating force F to extrude the piston rod of the pressurizing air cylinder, the piston rod of the pressurizing air cylinder is used for pressing the high-pressure oil to generate force F to push the compression molding piston rod to prop up to the pressurizing positioning bolt, and the pressurizing positioning bolt is fixed in the vertical direction, so that reaction force F is generated to act on the movable die plate, and accordingly, the die locking force is formed on the compression molding die arranged on the movable die plate. Before the movable mould plate rises again, controlling the electromagnetic valve in the air inlet/outlet direction of the pressurizing cylinder to change the direction, so that the pressurizing cylinder is depressurized, and then the pressurizing positioning bolt is retracted, so that the movable mould plate begins to rise and open the mould; and so on. The invention uses the electromagnetic valve to control the time of pressurizing and pressure releasing, and is more accurate and easier in control.
Drawings
The invention is further described below with reference to the drawings and embodiments:
FIG. 1 is a schematic diagram of the structure of the embodiment when the mold is opened;
FIG. 2 is a schematic diagram of the structure of the present embodiment during mold locking;
fig. 3 is a sectional view of the present embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1 to 3, the present embodiment provides a pressurizing mechanism for establishing a mold locking force of a movable mold plate 1 for compression molding, comprising a movable mold plate 1 and a compression mold provided on the movable mold plate 1, wherein a compression cylinder 2 is provided on the movable mold plate 1, a compression piston rod 3 for providing the mold locking force is provided in the compression cylinder 2, the compression cylinder 2 comprises a compression cylinder, a compression piston rod 3 and a return spring 10, the compression piston rod 3 comprises a compression piston and a compression rod, and the compression rod is mounted on the compression piston and acts together with the compression piston. The compression piston divides the compression cylinder into an upper air chamber and a lower oil chamber, and a sealing ring is arranged on the compression piston to ensure the independent tightness of the upper air chamber and the lower oil chamber. The return spring 10 is used for resetting the compression piston rod 3 to an initial position during decompression.
The top of the compression molding piston rod 3 passes through the compression molding cylinder 2 and extends to the pressurizing positioning bolt 4, the pressurizing positioning bolt 4 is movably arranged on the frame and is connected with a power mechanism capable of driving the pressurizing positioning bolt to horizontally move left and right, and the power mechanism can be an electromagnet, a cylinder, a motor or other mechanical structures. In the mode-locked state, the pressurizing positioning bolt 4 automatically stretches out to abut against the top of the compression molding piston rod 3, and then pressurizing is carried out, so that reactive mode locking force compression molding is generated. Before the die is opened, the electromagnetic valve is reversed, so that the pressurizing piston rod 8 does not squeeze the oil cavity any more, the hydraulic oil is reduced to normal pressure, then the compression molding piston rod 3 does not prop against the pressurizing positioning bolt 4 any more, the pressurizing positioning bolt 4 automatically retracts, and the movable die plate 1 and the compression molding piston rod 3 are not prevented from moving away from the die.
The compression molding cylinder 2 is connected with the pressurizing cylinder 5 and the pre-pressing cylinder 6 simultaneously through the oil guide plate 15, an oil outlet of the pre-pressing cylinder 6 is connected with an oil inlet of the pressurizing cylinder 5 through a seamless steel pipe, and a switch valve 7 is arranged, and the switch valve 7 is a needle valve. The pre-pressing oil cylinder 6 comprises a pre-pressing cylinder, a pre-pressing cylinder cover, a pre-pressing cylinder piston 11, a pre-pressing screw rod 12 and a pre-pressing screw rod pressing plate. The pre-pressing cylinder is provided with an oil inlet hole for oil inlet and an exhaust hole for exhaust when hydraulic oil is added, and a screw thread on a pre-pressing cylinder cover is matched with the pre-pressing screw rod; the pre-pressing screw rod 12 is arranged on the pre-pressing cylinder piston 11 in a pressing mode, the head of the pre-pressing screw rod 12 is limited in a circular groove of the pre-pressing cylinder piston 11, and the pre-pressing screw rod 12 can be driven to move up and down without driving the pre-pressing cylinder piston 11 to rotate when rotating. When the pre-pressing is needed, the needle valve is opened in the mold opening state, and the pre-pressing piston is pushed downwards by rotating the pre-pressing screw rod 12 in the arrow direction of the attached drawing 1, so that the hydraulic oil pre-pressing can be extruded. The pre-pressing is performed until the top of the compression piston rod 3 is shorter than the bottom of the pressurizing positioning bolt 4 and is close to the bottom as much as possible in the mode locking state of the attached drawing 2, and then the needle valve is closed to complete the pre-pressing action. When the pre-pressing is excessive or the pressure is required to be relieved due to other reasons, the needle valve can be opened, the pre-pressing screw rod 12 is rotated in the opposite direction of the arrow shown in the figure, and the needle valve is closed after the pre-pressing screw rod is adjusted. The whole prepressing oil cylinder 6 has high adjustability and convenient oiling.
The supercharging cylinder 5 is arranged on the movable template 1, a supercharging piston rod 8 is arranged in the supercharging cylinder 5, the supercharging cylinder 5 comprises a supercharging cylinder, a supercharging cylinder cover, the supercharging piston rod 8 and a pull rod sealing seat, the supercharging cylinder cover is used for being matched and sealed with the supercharging cylinder, a sealing ring is arranged at the joint position between the supercharging cylinder and the supercharging cylinder, an oil cavity is arranged at the lower part of the supercharging cylinder, an oil inlet hole is arranged at the upper part of the supercharging cylinder, an oil outlet hole of the prepressing cylinder is connected with a needle valve through a seamless steel pipe, and the needle valve is closed after the prepressing is finished. The top of the pressure increasing rod passes through the pressure increasing cylinder to reach the oil cavity area, the pressure increasing rod is connected with the pressure increasing piston, the upper air cavity and the lower air cavity of the pressure increasing cylinder are connected with a pressure mechanism capable of generating extrusion force, and the pressure increasing piston is positioned in the pressure mechanism 9. In this embodiment, the pressure mechanism 9 is a pressurizing cylinder capable of generating air pressure and a high-pressure air storage tank, and the pressurizing cylinder pressurizes the air and stores the air in the high-pressure air storage tank for later use. The supercharging piston divides the air cavity of the supercharging air cylinder into an upper air cavity and a lower air cavity, a sealing ring is arranged on the supercharging piston, the independent tightness of the upper air cavity and the lower air cavity is ensured, an air inlet/outlet is arranged on the supercharging cylinder cover and used for air inlet/outlet of the upper air cavity, and an air inlet/outlet is arranged at the bottom of the lower air cavity and used for air inlet/outlet of the lower air cavity; the upper part and the lower part of the pressurizing piston are provided with breathable bosses, and the breathable bosses are used for pushing the piston by air entering the upper part or the lower part of the piston when the piston is propped against the uppermost part or the lowermost part; the electromagnetic reversing valve can change the inlet/outlet direction to push the pressurizing piston to drive the pressurizing rod to move up and down. The pressurizing rod is arranged on the pressurizing piston and is used for extruding oil in the oil cavity to achieve the pressurizing effect when the piston pushes downwards. After the sealing piece is installed on the pull rod sealing seat, the pressure increasing rodThe sealing device is tightly matched and used for guaranteeing independent sealing performance of the lower air cavity and the oil cavity of the pressurizing oil cylinder 5, and each oil cylinder is highly sealed. The stress area of one end of the pressurizing piston rod 8 is larger than that of the other end, and one end with the larger stress area is positioned in the pressurizing cylinder. When the upper air cavity is used for air intake, the pressurizing piston is pushed to move downwards with the pressurizing rod to extrude the oil cavity, and the pressurizing cylinder piston is equal in force of the lower oil cavity and the upper air cavity, so that the pressure is obtained: f (F) Oil (oil) =F Air flow →P Oil (oil) ×S Oil (oil) =P Air flow ×S Air flow →P Oil (oil) = P Air flow ×S Air flow /S Oil (oil) So the air pressure P Air flow Area S of booster piston Air flow The larger the area S of the pressure increasing lever Oil (oil) The smaller the oil pressure is, the greater the supercharging effect can be.
In this embodiment, an oil guide plate 15 capable of communicating an oil path is arranged at the bottom of the movable mold plate 1, the oil guide plate 15 is used for connecting the oil cavities of the pressurizing oil cylinder 5 and the compression molding oil cylinder 2, so that the oil cavities are communicated, the oil pressure is equal, and sealing elements are arranged at the matching parts of the oil guide plate and the oil cylinder for sealing. The movable mould plate 1 is mainly used for installing a pre-pressing oil cylinder 6, a pressurizing oil cylinder 5, a compression molding oil cylinder 2 and a compression molding mould, and ensures that all parts are firmly installed and connected into a whole.
The working principle of this embodiment is as follows:
when the movable mould plate 1 is in a drawing mould opening state, the needle valve is opened, the pre-pressing screw rod 12 is rotated in the arrow direction shown in fig. 1, so that the compression cylinder 2 is pre-pressed until the compression piston rod 3 is lower than the bottom of the pressurization locating bolt 4 but is close to the bottom as much as possible in a mould locking state, and the pressurization locating bolt 4 can be ensured to extend and retract normally. And then closing the needle valve to ensure that oil does not flow back to the pre-pressing cylinder during pressurization, and completing pre-pressing, wherein the pre-pressing needs to be regulated before normal operation. When the pre-pressing is excessive or the pressure is required to be relieved due to other reasons, the needle valve can be opened, the pre-pressing screw rod 12 is rotated in the reverse direction of the arrow shown in fig. 1, and the needle valve is closed after the pre-pressing screw rod is adjusted. In normal operation, when the movable mould plate 1 is initially moved upwards to be in a mould opening state as shown in the attached drawing, the pressurizing positioning bolt 4 is retracted and cannot prop against the compression moulding piston rod 3; when the movable mould plate 1 moves downwards to be clamped and is in the mode locking state of figure 2, the pressurizing positioning bolt 4 stretches out to prop against the top of the compression moulding piston rod 3,at the moment, the upper air cavity of the pressurizing air cylinder is filled with air, and force F is generated on the upper surface of the pressurizing piston rod 1 The oil cavity below the extrusion pressure cylinder is pressurized, and the pressure-increasing piston rod 8 is equal in force by the lower oil cavity and the upper air cavity, so that the following weight is obtained: f (F) Oil (oil) =F Air flow →P Oil (oil) ×S Oil (oil) =P Air flow ×S Air flow →P Oil (oil) = P Air flow ×S Air flow /S Oil (oil) ,P Air flow Is a constant value, and S Air flow Ratio S Oil (oil) Much larger, and thus can produce a ratio P Air flow The oil pressure P is many times larger, and the high-pressure oil generates great force F 2 Pushing the compression molding piston rod 3 to push up to the pressurizing positioning bolt 4 to generate a great reaction force F 3 Acting on the movable die plate 1, thereby acting on the compression mold mounted on the movable die plate 1 to form a mold locking force. Before the movable mould plate 1 rises again, controlling the electromagnetic valve in the air inlet/outlet direction of the pressurizing cylinder to change the direction, so that the pressurizing piston rod 8 does not squeeze the oil cavity any more, the hydraulic oil is reduced to normal pressure, then the compression piston rod 8 does not bear the pressurizing positioning bolt 4 any more, the pressurizing positioning bolt 4 is retracted, and the movable mould plate 1 begins to rise and open the mould; and so on.
The foregoing is only a preferred embodiment of the present invention, and all technical solutions for achieving the object of the present invention by substantially the same means are included in the scope of the present invention.
Claims (6)
1. The utility model provides a establish booster mechanism of compression moulding movable mould board clamping force, includes movable mould board (1) and sets up the compression mould on movable mould board (1), its characterized in that: the movable template (1) is provided with a compression molding cylinder (2), a compression molding piston rod (3) for providing mold locking force is arranged in the compression molding cylinder (2), the top of the compression molding piston rod (3) penetrates through the compression molding cylinder (2) and extends to a pressurizing positioning bolt (4), the pressurizing positioning bolt (4) is movably arranged on a frame and is connected with a power mechanism capable of driving the pressurizing positioning bolt to move left and right, the compression molding cylinder (2) is simultaneously connected with a pressurizing cylinder (5) and a pre-pressing cylinder (6) through an oil pipe, a switch valve (7) is arranged between the pre-pressing cylinder (6) and the compression molding cylinder (2) and is arranged between the pressurizing cylinder (5), the pressurizing cylinder (5) is arranged on the movable template (1), a pressurizing piston rod (8) is arranged in the pressurizing cylinder (5), the top of the pressurizing piston rod (8) penetrates through the pressurizing cylinder (5) and is connected with a pressurizing mechanism (9) capable of generating extrusion force, and the pressurizing mechanism (9) is a pressurizing cylinder; the bottom of the movable template (1) is provided with an oil guide plate (15) capable of being communicated with an oil path, and the compression molding oil cylinder (2) is simultaneously connected with the pressurizing oil cylinder (5) and the pre-pressing oil cylinder (6) through the oil guide plate (15);
when the movable die plate (1) moves downwards to be clamped and is in a die locking state, the pressurizing positioning bolt (4) stretches out to prop against the top of the compression molding piston rod (3), at the moment, the upper air cavity of the pressurizing cylinder is filled with air, the upper surface of the pressurizing piston rod (8) generates force F1 to extrude the oil cavity below the pressurizing cylinder to pressurize, the compression molding piston rod (3) is pushed upwards to the pressurizing positioning bolt (4) by the force F2 generated by high-pressure oil, and the reaction force F3 is generated to act on the movable die plate (1), so that the reaction force F3 acts on a compression molding die arranged on the movable die plate (1) to form a die locking force.
2. A pressurizing mechanism for establishing a mold locking force of a compression molding movable mold plate according to claim 1, wherein: the pressurizing piston rod (8) comprises a pressurizing piston and a pressurizing rod, the stressed area of one end is larger than that of the other end, and one end with larger stressed area is positioned in the pressurizing cylinder.
3. A pressurizing mechanism for establishing a mold locking force of a compression molding movable mold plate according to claim 1, wherein: the supercharging oil cylinder (5) comprises a supercharging cylinder, a supercharging cylinder cover, a supercharging piston rod (8) and a pull rod sealing seat.
4. A pressurizing mechanism for establishing a mold locking force of a compression molding movable mold plate according to claim 2, wherein: the upper and lower parts of the pressurizing piston are provided with bosses for ventilation.
5. A pressurizing mechanism for establishing a mold locking force of a compression molding movable mold plate according to claim 1, wherein: a reset spring (10) is arranged in the compression molding cylinder (2).
6. A pressurizing mechanism for establishing a mold locking force of a compression molding movable mold plate according to claim 1, wherein: the pre-pressing oil cylinder (6) comprises a pre-pressing cylinder, a pre-pressing cylinder cover, a pre-pressing cylinder piston (11), a pre-pressing screw rod (12) and a pre-pressing screw rod pressing plate.
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Application Number | Priority Date | Filing Date | Title |
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CN201910009886.9A CN109454798B (en) | 2019-01-05 | 2019-01-05 | Pressurizing mechanism for establishing compression molding movable mold plate mold locking force |
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CN201910009886.9A CN109454798B (en) | 2019-01-05 | 2019-01-05 | Pressurizing mechanism for establishing compression molding movable mold plate mold locking force |
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CN109454798A CN109454798A (en) | 2019-03-12 |
CN109454798B true CN109454798B (en) | 2024-04-02 |
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US4690629A (en) * | 1985-06-19 | 1987-09-01 | Yoshida Kogyo K. K. | Injection molding machine for small-sized articles |
JPS6295207A (en) * | 1985-10-23 | 1987-05-01 | Hitachi Ltd | Transfer mold press |
KR19980031773A (en) * | 1996-10-31 | 1998-07-25 | 양재신 | Cylinder for fixing the position of the body panel with increased initial pressing force |
JP2001124002A (en) * | 1999-10-22 | 2001-05-08 | Taiyo Ltd | Preloading type booster |
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