CN117128209A - Hydraulic cylinder, mold opening and closing mechanism and injection molding machine - Google Patents
Hydraulic cylinder, mold opening and closing mechanism and injection molding machine Download PDFInfo
- Publication number
- CN117128209A CN117128209A CN202211013425.7A CN202211013425A CN117128209A CN 117128209 A CN117128209 A CN 117128209A CN 202211013425 A CN202211013425 A CN 202211013425A CN 117128209 A CN117128209 A CN 117128209A
- Authority
- CN
- China
- Prior art keywords
- valve core
- channel
- oil
- hydraulic cylinder
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 18
- 230000001502 supplementing effect Effects 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 241001133184 Colletotrichum agaves Species 0.000 claims description 2
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
Classifications
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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
-
- 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
- B29C45/67—Mould opening, closing or clamping devices hydraulic
-
- 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
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
-
- 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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/202—Externally-operated valves mounted in or on the actuator
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a hydraulic cylinder, a die opening and closing mechanism and an injection molding machine, wherein the hydraulic cylinder comprises a shell and a piston, one end of the piston is provided with a piston rod, the interior of the piston is provided with an oil supplementing channel communicated with cavities on two sides of the piston, and the oil supplementing channel comprises: an oil inlet channel communicated with one side of the piston; the oil outlet channel is communicated with one side of the piston, which is opposite to the oil inlet channel; the valve core channel is communicated with the oil inlet channel and the oil outlet channel, a valve core capable of sealing the valve core channel is arranged in the valve core channel, and the valve core can slide in the valve core channel. The oil is replenished through the oil replenishing channel, so that oil does not need to pass through an oil pump, the oil replenishing speed is high, and the efficiency of the hydraulic cylinder is higher.
Description
Technical Field
The invention belongs to the technical field of molds, and particularly relates to an injection molding machine and a hydraulic cylinder applied to an opening and closing mechanism of the mold of the injection molding machine.
Background
Molds are important tools in the manufacturing industry, and in the process of producing various products using the molds, such as injection molding machines, the operations of closing and opening the molds are often required to facilitate operations such as demolding. Because the weight of the die is large, hydraulic cylinders are mostly adopted as driving equipment for opening and closing the die. The hydraulic cylinder is a commonly used power driving device, the normal operation of the hydraulic cylinder depends on timely oil supplementing of an oil pump, and the oil supplementing efficiency limits the maximum power which can be provided by the hydraulic cylinder, so that in the die opening and closing mechanism, in order to reduce the oil supplementing dependence of the hydraulic cylinder and reduce the volume of the hydraulic cylinder, a power amplifying structure is further arranged between the hydraulic cylinder and a die, as shown in fig. 1, the power amplifying structure 12 generally adopts devices such as a connecting rod and the like, and lubrication and the like are needed, so that the die is easy to be stained with greasy dirt, and the die cannot adapt to production conditions of products with high requirements on sanitation, such as production of medical appliances. On the other hand, if the power amplification structure 12 is omitted, the hydraulic cylinder must be increased in size, so that the power of the oil pump must be increased to improve the oil replenishing efficiency, resulting in a great increase in energy consumption.
Disclosure of Invention
In order to solve the problem that a hydraulic cylinder of a die opening and closing mechanism cannot achieve both energy consumption and cleaning in the prior art, the invention provides the hydraulic cylinder capable of improving the oil supplementing efficiency, the die opening and closing mechanism and the injection molding machine, and the power of an oil supplementing pump can be reduced while a power amplifying structure is omitted.
The invention is realized by the following technical scheme: the utility model provides a pneumatic cylinder, includes shell and piston, the one end of piston is provided with the piston rod, the inside oil supplementing passageway that is provided with the cavity in intercommunication piston both sides of piston, the oil supplementing passageway includes:
an oil inlet channel communicated with one side of the piston;
the oil outlet channel is communicated with one side of the piston, which is opposite to the oil inlet channel;
the valve core channel is communicated with the oil inlet channel and the oil outlet channel, a valve core capable of sealing the valve core channel is arranged in the valve core channel, and the valve core can slide in the valve core channel.
When the piston moves to one side of the oil inlet channel, the cavity of one side of the piston, facing the oil outlet channel, of the hydraulic cylinder needs to be supplemented with oil, and at the moment, the valve core is moved to enable the oil supplementing channel to be communicated, so that oil enters the enlarged side of the space of the hydraulic cylinder from the compressed side of the space of the hydraulic cylinder to complete oil supplementing. The oil is replenished through the oil replenishing channel, so that oil does not need to pass through an oil pump, the oil replenishing speed is high, and the efficiency of the hydraulic cylinder is higher.
Preferably, the piston divides the housing into two cavities, and each cavity is provided with an oil inlet and an oil outlet communicated with the oil pump. The two cavities are connected with the oil pump, and are used for supplementing oil together with the oil supplementing channel and improving the oil power.
Preferably, the valve core is dumbbell-shaped, two ends of the valve core can seal the valve core channel, and the length of the valve core is longer than the distance between the oil inlet channel and the oil outlet channel and between the oil inlet channel and the oil outlet channel. The dumbbell-shaped valve core reduces the oil passing space in the valve core channel, plays a role in guiding oil, and reduces the resistance of the valve core channel to the oil when the oil passes.
Preferably, one end of the valve core is provided with a protection section with a cross section area larger than that of the end part of the valve core, and the valve core channel is correspondingly provided with a protection channel for sliding of the protection section. The protection section can prevent the valve core from being damaged due to the fact that the moving distance is too large and the valve core is touched on the wall surface.
Preferably, a control rod for controlling the movement of the valve core is arranged on one side of the valve core, which is away from the sliding rod, and the control rod penetrates out of the shell. The movement of the valve core is conveniently controlled at the outer side of the hydraulic cylinder through the control rod.
Preferably, the piston rod is internally of a hollow structure, one side of the valve core, which faces the sliding rod, is provided with a control rod for controlling the valve core to move, and the control rod penetrates out of the piston rod. The control rod penetrates out of the piston rod, so that the integration level of the whole structure is higher.
The power mechanism for opening and closing the die is the hydraulic cylinder.
Preferably, the hydraulic cylinder is characterized by further comprising an upper die close to the hydraulic cylinder and a lower die positioned on one side of the upper die back to the hydraulic cylinder, wherein the end part of a piston rod of the hydraulic cylinder, which is positioned outside the shell, is fixedly connected with the lower die, and the upper die is in sliding connection with the piston rod. The movement of the piston rod drives the upper die to move, so that the die opening and closing process is controlled.
Preferably, the hydraulic cylinders are arranged in four groups and are respectively positioned at four corners of the die. So that the stress of the mold opening and closing mechanism is more balanced.
The injection molding machine comprising the mold opening and closing mechanism further comprises injection molding equipment, and the power amplification structure is omitted, so that the injection molding machine is simplified, and the arrangement of the injection molding equipment is flexible.
Compared with the prior art, the invention has the advantages that:
the oil is replenished through the oil replenishing channel, so that oil does not need to pass through an oil pump, the oil replenishing speed is high, and the efficiency of the hydraulic cylinder is improved after the oil replenishing channel is matched with the oil pump for replenishing oil.
Drawings
FIG. 1 is a schematic perspective view of a mold opening and closing mechanism with a power amplification structure in the prior art;
FIG. 2 is a schematic cross-sectional view of a hydraulic pump according to a first embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a hydraulic pump according to a second embodiment of the present invention;
fig. 4 is a schematic perspective view of a third or fourth embodiment of the present invention.
In the figure: the device comprises a shell 1, a piston 2, a piston rod 3, an oil inlet channel 4, an oil outlet channel 5, a valve core channel 6, a protection channel 61, a valve core 7, a protection section 71, a control rod 8, a hydraulic cylinder 9, an upper die 10, a lower die 11, a power amplification structure 12 and injection molding equipment 13.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the present invention easy to understand, the following further describes how the present invention is implemented with reference to the accompanying drawings and the detailed description.
First embodiment, as shown in fig. 2, a hydraulic cylinder 9 includes a housing 1 and a piston 2, one end of the piston 2 is provided with a piston rod 3, an oil supplementing channel communicating with cavities on two sides of the piston 2 is provided in the piston 2, and the oil supplementing channel includes:
an oil inlet passage 4 communicated with one side of the piston 2;
an oil outlet passage 5 communicated with one side of the piston 2, which is back to the oil inlet passage 4;
the valve core channel 6 is communicated with the oil inlet channel 4 and the oil outlet channel 5, a valve core 7 capable of sealing the valve core channel 6 is arranged in the valve core channel 6, and the valve core 7 can slide in the valve core channel 6.
The valve core 7 is dumbbell-shaped, two ends of the valve core 7 can seal the valve core channel 6, and the length of the valve core 7 is longer than the distance between the oil inlet channel 4 and the oil outlet channel 5 and the valve core channel 6. The dumbbell-shaped valve core 7 reduces the oil passing space in the valve core channel, plays a role in guiding oil, and reduces the resistance of the valve core channel 6 to the oil when the oil passes.
One end of the valve core 7 is provided with a protection section 71 with a larger cross-sectional area than the end of the valve core 7, and the valve core channel 6 is correspondingly provided with a protection channel 61 for sliding the protection section 71. The protection segment 71 can prevent damage caused by the excessive moving distance of the valve core 7 when the valve core is opened and the wall surface is touched.
Further, the piston 2 divides the housing into two cavities, and each cavity is provided with an oil inlet and an oil outlet communicated with the oil pump. The two cavities are connected with the oil pump, and are used for supplementing oil together with the oil supplementing channel and improving the oil power.
Further, the piston rod 3 is of a hollow structure, a control rod 8 for controlling the movement of the valve core 7 is arranged on one side of the valve core 7 facing the piston rod 3, and the control rod 8 penetrates out of the piston rod 3. The control rod 8 penetrates out of the piston rod 3, so that the integration level of the whole structure is higher.
When the piston 2 moves to the oil inlet channel 4, the cavity of the hydraulic cylinder 9 at one side of the piston 2 facing the oil outlet channel 5 needs to be supplemented with oil, and at the moment, the control rod 8 is moved to control the valve core 7 so that the oil supplementing channels are communicated, and oil enters the enlarged side of the space of the hydraulic cylinder from the compressed side of the space of the hydraulic cylinder to complete oil supplementing. The oil is replenished through the oil replenishing channel, so that oil does not need to pass through an oil pump, the oil replenishing speed is high, and the efficiency of the hydraulic cylinder is higher. When the piston 2 moves toward the oil outlet passage 5, the oil is replenished in the opposite direction.
In the second embodiment, as shown in fig. 3, a control rod 8 for controlling the movement of the valve element 7 is provided on the side of the valve element 7 facing away from the piston rod 3, and the control rod 8 is passed through the housing. The control rod 8 and the piston rod 3 are located on both sides of the piston.
In the third embodiment, as shown in fig. 4, a power mechanism for opening and closing the mold is the hydraulic cylinder 9 in the first embodiment, and further includes an upper mold 10 close to the hydraulic cylinder and a lower mold 11 located on a side of the upper mold 10 opposite to the hydraulic cylinder 9, wherein an end portion of the piston rod 3 of the hydraulic cylinder 9 outside the housing is fixedly connected with the lower mold 11, and the upper mold 10 is slidably connected with the piston rod 3. The upper die 10 is driven to move by the movement of the piston rod 3, so that the die opening and closing process is controlled. The hydraulic cylinders 9 are provided with four groups which are respectively positioned at four corners of the die. So that the stress of the mold opening and closing mechanism is more balanced.
In the fourth embodiment, as shown in fig. 4, an injection molding machine includes the mold opening and closing mechanism in the second embodiment, and further includes the injection molding device 13, so that the injection molding machine is simplified and the arrangement of the injection molding device is flexible due to the omission of the power amplifying structure.
Claims (10)
1. The utility model provides a pneumatic cylinder, includes shell and piston, the one end of piston is provided with the piston rod, its characterized in that, the inside oil supplementing passageway that is provided with the cavity in intercommunication piston both sides of piston, the oil supplementing passageway includes:
an oil inlet channel communicated with one side of the piston;
the oil outlet channel is communicated with one side of the piston, which is opposite to the oil inlet channel;
the valve core channel is communicated with the oil inlet channel and the oil outlet channel, a valve core capable of sealing the valve core channel is arranged in the valve core channel, and the valve core can slide in the valve core channel.
2. The hydraulic cylinder according to claim 1, characterized in that: the piston divides the shell into two cavities, and each cavity is provided with an oil inlet and an oil outlet which are communicated with the oil pump.
3. The hydraulic cylinder according to claim 1, characterized in that: the valve core is arranged in a dumbbell shape, two ends of the valve core can seal the valve core channel, and the length of the valve core is longer than the distance between the oil inlet channel and the oil outlet channel and between the oil inlet channel and the valve core channel.
4. A hydraulic cylinder according to claim 3, characterized in that: one end of the valve core is provided with a protection section with the cross section area larger than that of the end part of the valve core, and the valve core channel is correspondingly provided with a protection channel for the protection section to slide.
5. The hydraulic cylinder according to claim 4, wherein: and a control rod for controlling the movement of the valve core is arranged at one side of the valve core, which is opposite to the piston rod, and the control rod penetrates out of the shell.
6. The hydraulic cylinder according to claim 4, wherein: the piston rod is internally of a hollow structure, a control rod for controlling the movement of the valve core is arranged on one side of the valve core facing the piston rod, and the control rod penetrates out of the piston rod.
7. A mould opening and closing mechanism which is characterized in that: the power mechanism for opening and closing the die is the hydraulic cylinder as set forth in any one of claims 1 to 6.
8. The mold opening and closing mechanism according to claim 7, wherein: the hydraulic cylinder is characterized by further comprising an upper die close to the hydraulic cylinder and a lower die positioned on one side of the upper die back to the hydraulic cylinder, wherein the end part of a piston rod of the hydraulic cylinder, which is positioned outside the shell, is fixedly connected with the lower die, and the upper die is in sliding connection with the piston rod.
9. The mold opening and closing mechanism according to claim 7 or 8, characterized in that: the hydraulic cylinders are arranged in four groups and are respectively located at four corners of the die.
10. An injection molding machine comprising the mold opening and closing mechanism according to claims 7 to 9, characterized in that: also comprises an injection molding device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211013425.7A CN117128209A (en) | 2022-08-23 | 2022-08-23 | Hydraulic cylinder, mold opening and closing mechanism and injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211013425.7A CN117128209A (en) | 2022-08-23 | 2022-08-23 | Hydraulic cylinder, mold opening and closing mechanism and injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117128209A true CN117128209A (en) | 2023-11-28 |
Family
ID=88857005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211013425.7A Pending CN117128209A (en) | 2022-08-23 | 2022-08-23 | Hydraulic cylinder, mold opening and closing mechanism and injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117128209A (en) |
-
2022
- 2022-08-23 CN CN202211013425.7A patent/CN117128209A/en active Pending
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