CN117719143A - Energy-saving five-valve six-step bottle blowing method and device thereof - Google Patents
Energy-saving five-valve six-step bottle blowing method and device thereof Download PDFInfo
- Publication number
- CN117719143A CN117719143A CN202410093468.3A CN202410093468A CN117719143A CN 117719143 A CN117719143 A CN 117719143A CN 202410093468 A CN202410093468 A CN 202410093468A CN 117719143 A CN117719143 A CN 117719143A
- Authority
- CN
- China
- Prior art keywords
- blowing
- valve
- pressure
- gas
- storage bag
- 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
- 238000007664 blowing Methods 0.000 title claims abstract description 381
- 238000000034 method Methods 0.000 title claims abstract description 51
- 230000008569 process Effects 0.000 claims abstract description 26
- 238000004064 recycling Methods 0.000 claims abstract description 10
- 238000003860 storage Methods 0.000 claims description 127
- 238000011084 recovery Methods 0.000 claims description 60
- 230000009471 action Effects 0.000 claims description 4
- 230000006837 decompression Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000003584 silencer Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
Abstract
The invention discloses an energy-saving five-valve six-step bottle blowing method and a device thereof, wherein the bottle blowing method is divided into six-step bottle blowing processes of pre-blowing, middle blowing, high-pressure blowing, middle returning, recycling and exhausting, the device adopts a pre-blowing valve, a high-pressure valve, a middle blowing and middle returning valve, a recycling valve and an exhausting valve, and the performance of products can be ensured and the high-pressure air consumption can be reduced through the five valves. The invention increases the blowing, middle returning and recycling processes in use, reduces the air consumption of the bottle blowing by 60% compared with the original three-valve three-step process method, and achieves the purposes of energy conservation and consumption reduction.
Description
Technical Field
The invention relates to the technical field of bottle blowing, in particular to an energy-saving five-valve six-step bottle blowing method and a device thereof.
Background
At present, the two-step bottle blowing technology is a common technological method for PET bottle production enterprises, PET particles are injected into a mould through a special bottle blank machine, cooled and shaped, and then PET bottles with different specifications are blown through a special bottle blowing machine and a mould. Has the characteristics of mass production and convenient product switching. Packaging products such as beverages, dairy products, daily chemicals and the like which are mainstream in China are increasingly widely used in the market, and the bottle shaping is completed by the production equipment through a process of heating and blowing the bottle at high pressure.
The bottle blowing technology by the two-step method has the advantages that the bottle blowing consumption is high, the extremely high energy consumption is caused, the electricity cost is not advantageous, along with the strict management and control of energy conservation and emission reduction and environmental protection in China, the bottle blowing machine is improved, the original three-valve three-step bottle blowing technology is improved and upgraded, namely the three-step bottle blowing technology of pre-blowing, high-pressure blowing and exhausting is realized by utilizing a pre-blowing valve, a high-pressure valve and an exhaust valve, the bottle blowing technology on the existing equipment is broken through, the gas usage amount of compressed air is reduced, and the purposes of energy conservation, consumption reduction and cost reduction are achieved. Optimizing production processes is a clear trend in market development. When compressed air for bottle blowing is led into the mould, a series of valves and cylinders are needed to control pre-blowing, high-pressure blowing and exhausting, and the controlled valves and cylinders waste a large amount of gas and energy consumption in the bottle blowing process due to no energy-saving requirement, so that the production cost is increased.
Disclosure of Invention
The invention aims to overcome the difficulty in the prior art and provides an energy-saving five-valve six-step bottle blowing method and a device thereof, which not only ensure the performance of products, but also reduce the high-pressure air consumption.
The invention discloses an energy-saving five-valve six-step bottle blowing method, which comprises the following steps:
step one: opening a pre-blowing valve, blowing pre-blowing gas in a pre-blowing gas path into a bottle blank through the pre-blowing valve, and enabling the pre-blowing gas to enter a die through a pipeline connected with a compensation gas interface, so that the die is balanced left and right, and the pre-blowing valve is closed when the process requirement is met;
step two: opening a middle blowing and middle returning valve, blowing middle blowing pressure gas in a middle blowing gas storage bag into a bottle blank through the middle blowing and middle returning valve, enabling the middle blowing pressure gas to enter a die through a pipeline connected with a compensation gas interface, balancing the left and right of the die, and closing the middle blowing valve after the time is finished;
step three: opening a high-pressure blowing valve, blowing high-pressure air in a high-pressure air path into a bottle blank through the high-pressure blowing valve, enabling the high-pressure air to enter a die through a pipeline connected with a compensation air interface, balancing the left and right of the die, and closing the high-pressure valve when the shape of the bottle blank is converted into a bottle;
step four: opening a middle blowing and middle returning valve, recycling the gas part in the formed bottle to the middle blowing gas storage bag and the gas dividing path, and then closing the middle blowing and middle returning valve;
step five: opening a recovery valve, recovering the residual gas in the formed bottle to a low-pressure gas storage bag and a low-pressure gas path, and then closing the recovery valve;
step six: an exhaust valve is opened to exhaust the residual gas in the bottle.
Further, the high-pressure air supply source is communicated with the middle-blowing air storage bag and the low-pressure air storage bag, before the first step, the high-pressure air supply source stores middle-blowing air of pressure in the middle-blowing air storage bag through the pressure reducing valve, the high-pressure air supply source stores middle-blowing air of half pressure in the low-pressure air storage bag through the pressure reducing valve, a one-way valve is arranged between the middle-blowing air storage bag and the pressure reducing valve, and a one-way valve is arranged between the low-pressure air storage bag and the pressure reducing valve.
Further, the pre-blowing gas is provided by the middle blowing pressure gas in the middle blowing gas storage bag through a pre-blowing valve reducing valve.
Further, in the bottle blowing process of the middle-blowing gas storage bag, the middle-blowing and middle-returning valve is used for recovering part of gas in the formed bottle in a decompression mode, meanwhile, the middle-blowing and middle-returning valve is used for filling and blowing gas into bottle blanks in a rear die station, the gas pressure in the middle-pressure gas storage bag forms dynamic balance and is maintained at the middle-blowing pressure, and if the gas pressure in the middle-blowing gas storage bag does not reach the middle-blowing pressure, the high-pressure gas supply source is used for supplying gas into the middle-blowing gas storage bag through the decompression valve so as to maintain the gas pressure in the middle-blowing gas storage bag as the middle-blowing pressure.
Further, the low-pressure gas storage bag is used for recycling medium-pressure gas in the bottle after the medium-pressure gas is recycled through the medium-pressure blowing and medium-pressure returning valve by opening the recycling valve, the recycled gas is used for gas for the stretching cylinder and the blowing nozzle cylinder, and the low-pressure gas storage bag is used for supplying gas for the stretching cylinder and the blowing nozzle cylinder through the pressure reducing valve.
Further, in the first step, the stretching cylinder is operated at the same time of pre-blowing, and the bottle preform is stretched to the bottom of the forming die by the pull-up rod, and the bottle preform is stretched while pre-blowing.
The invention also discloses an energy-saving five-valve six-step bottle blowing device which is used for realizing the energy-saving five-valve six-step bottle blowing method and comprises a pre-blowing valve, a middle-blowing and middle-back valve, a high-pressure blowing valve, an exhaust valve, a recovery valve, a middle-blowing gas storage bag and a low-pressure gas storage bag, wherein a high-pressure gas supply source is respectively communicated with the middle-blowing gas storage bag and the low-pressure gas storage bag through two pressure reducing valves, the high-pressure gas supply source is communicated with a middle-blowing gas storage bag through the pressure reducing valves, the high-pressure gas supply source is communicated with an input end of the high-pressure blowing valve, an output end of the high-pressure blowing valve is communicated with a blowing nozzle and a compensating gas interface, middle-blowing pressure gas in the middle-blowing gas storage bag is respectively provided with the low-pressure gas storage bag through the pressure reducing valves of the pre-blowing valve, an output end of the pre-blowing valve is communicated with a compensating gas interface, the middle-blowing gas supply source is also communicated with the middle-blowing gas storage bag through the pressure reducing valves, the middle-blowing gas storage bag is also communicated with the compensating gas storage bag through the pressure reducing valves, the middle-blowing valve is communicated with the air storage bag, the low-pressure air storage bag is communicated with the air storage bag through the air inlet and the air outlet valve, and the compensating valve is communicated with the air inlet end of the compensating valve, and the air inlet port is communicated with the air inlet port.
Further, the middle-blowing gas storage bag is provided with a one-way valve on a pipeline for supplying air pressure to the middle-blowing gas storage bag by high-pressure air through a pressure reducing valve, the low-pressure gas storage bag is provided with a one-way valve on a pipeline for supplying air pressure to the low-pressure gas storage bag by high-pressure air through the pressure reducing valve, and the one-way valve is used for preventing the pressure reducing valve from outwards discharging and air leakage phenomena generated in the recovery process of the middle-blowing gas storage bag and the low-pressure gas storage bag; the output end of the high-pressure blowing valve, the output end of the pre-blowing valve and the input end of the recovery valve are respectively provided with a one-way valve, and the one-way valves are used for preventing pre-blowing and high-pressure gas from being mutually connected; the middle blowing and middle returning valve is used for supplying air in two directions.
Further, the exhaust valve, the recovery valve, the middle-blowing and middle-returning valve, the high-pressure blowing valve and the pre-blowing valve all comprise main valves and electromagnetic pilot valves, the input ends of the electromagnetic pilot valves of the exhaust valve, the recovery valve, the high-pressure blowing valve, the middle-blowing and middle-returning valve and the pre-blowing valve are communicated with pilot valve gas supply sources for the power of the corresponding valve body movements, the output ends of the electromagnetic pilot valves of the exhaust valve, the recovery valve, the high-pressure blowing valve, the middle-blowing and middle-returning valve and the pre-blowing valve enter corresponding main valve control ports, and when the electromagnetic pilot valves of the recovery valve, the middle-blowing and middle-returning valve, the high-pressure blowing valve and the pre-blowing valve are electrified, the corresponding main valve passages are formed; when the electromagnetic pilot valves of the recovery valve, the middle blowing and middle returning valve, the high-pressure blowing valve and the pre-blowing valve are powered off, the corresponding main valves are disconnected; when the electromagnetic pilot valve of the exhaust valve is powered off, the electromagnetic pilot valve corresponds to the main valve passage, gas is exhausted, and when the exhaust valve is powered on, the corresponding main valve is disconnected, and gas is sealed.
The invention has the beneficial effects that:
the five-valve six-step bottle blowing process disclosed by the invention utilizes the pre-blowing valve, the high-pressure valve, the middle-back valve (also called middle-blowing valve), the recovery valve and the exhaust valve to divide the bottle blowing process into the 6-step bottle blowing processes of pre-blowing, middle-blowing, high-pressure blowing, middle-back, recovery, exhaust and the like, so that the performance of products can be ensured, and the high-pressure air consumption is reduced. The process of blowing, medium recovery and recovery in use is increased, the air consumption of bottle blowing is reduced by 60% compared with the original three-valve three-step process, and the purpose of consumption reduction is achieved.
Drawings
FIG. 1 is a schematic diagram of the gas circuit of the energy-saving five-valve six-step bottle blowing device disclosed by the invention;
fig. 2 is a graph showing a change in gas pressure curve of the energy-saving five-valve six-step bottle blowing method disclosed by the invention.
Detailed Description
The following describes in detail the examples of the present invention, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of protection of the present invention is not limited to the following examples.
The invention discloses an energy-saving five-valve six-step bottle blowing method, wherein the pressure range of pre-blowing gas (P1) is 7-12BAR, the pressure range of medium-blowing pressure gas (P2) is 15-18BAR, and the pressure range of high-pressure gas (P3) is 28-30BAR. In the present embodiment, the medium-pressure gas (P2) is half the pressure of the high-pressure gas (P3), and the low-pressure gas is half the pressure of the medium-pressure gas (P2).
As shown in fig. 1 and 2, the invention discloses an energy-saving five-valve six-step bottle blowing method, which comprises the following steps:
step one: preblowing: opening a pre-blowing valve, blowing pre-blowing gas (P1) in a pre-blowing gas path into a bottle blank through the pre-blowing valve to perform pre-blowing, simultaneously stretching a cylinder to act, stretching the bottle blank to the bottom of a forming die through a pull-up rod while pre-blowing, simultaneously stretching the bottle blank while stretching the bottle blank, enabling the pre-blowing gas (P1) to enter a movable left side die through a pipeline connected with a compensation gas interface, forming cylinder thrust in a closed cavity between the left side die and a left die frame, pushing the left side die to tightly attach to the right side die, enabling the left side die and the right side die to be tightly attached, preventing the left die and the right die from being separated and expanded in the blowing process, and closing the pre-blowing valve after the time and the pressure required by the setting process are reached, wherein the gas pressure in the bottle blank reaches about 7 BAR.
Step two: middle blowing: the middle blowing and middle returning valve is opened, middle blowing pressure gas (P2) in the middle blowing gas storage bag is blown into the bottle blank through the middle blowing valve, the pressure of the middle blowing pressure gas (P2) is about 15BAR, meanwhile, the middle blowing pressure gas (P2) enters the movable left side die through a pipeline connected with the compensation gas interface, cylinder thrust is formed in a closed cavity between the left side die and the left die frame, the left side die is pushed to be tightly attached to the right side die, the left side die and the right side die are tightly attached, the left die and the right die are prevented from being separated and expanded in the blowing process, the middle blowing valve is closed after the time and the pressure required by the setting process are reached, and the air pressure in the bottle blank reaches 15BAR.
Step three: high-pressure blowing: opening a high-pressure blowing valve, blowing high-pressure air (P3) in a high-pressure air path into a bottle blank through the high-pressure blowing valve, enabling the air pressure of the high-pressure air (P3) to be about 30BAR, enabling the high-pressure air (P3) to enter a movable left side die through a pipeline connected with a compensation air interface, forming air cylinder thrust in a closed cavity between the left side die and a left die frame, pushing the left side die to be tightly attached to the right side die, enabling the left side die to be tightly attached to the right side die, preventing the left side die and the right die from being separated and expanding, enabling the bottle blank to be unable to be shaped, enabling the bottle blank to be shaped into a bottle after a certain period of pressure maintaining, and then closing the high-pressure valve, wherein the air pressure in the bottle reaches about 30BAR.
Step four: middle-back: and opening the middle blowing and middle returning valve, recovering the gas part in the molded bottle into the middle blowing gas storage bag and the gas dividing path, controlling the middle blowing recovery pressure to be about 15BAR, and then closing the middle blowing and middle returning valve.
Step five: and (3) recycling: the recovery valve was opened to recover the remaining gas in the molded bottle to the low-pressure gas storage bag and the low-pressure gas line, the recovered gas pressure was about 7BAR, and after the recovery was completed, the recovery valve was closed.
Step six: and (3) exhausting: and opening the exhaust valve to exhaust the residual gas in the bottle blank. At this time, the pressure of the discharged gas is only about 7BAR, the original 30BAR discharge pressure in the bottle is reduced to about 7BAR discharge pressure, the gas capacity of the pressure difference 23BAR is recovered, the recovery efficiency reaches 76%, and the consumption of compressed air is reduced by about 60% as a whole due to the auxiliary stretching cylinder gas and the blowing nozzle cylinder gas in the bottle blowing production.
Before the first step, the medium-pressure gas storage bag and the low-pressure gas storage bag store gas with certain pressure and store gas with certain pressure. In this embodiment, a high-pressure air supply communicates the medium-pressure air reservoir and the low-pressure air reservoir.
The high-pressure gas supply source is used for blowing the gas with medium-pressure into the medium-pressure gas storage bag through the pressure reducing valve, namely, a bottle blowing gas source with 30BAR is used for reducing the pressure to medium-pressure gas pressure (the pressure is about 15 BAR), and the pressure of the gas stored in the medium-pressure gas storage bag is about 15BAR. The gas in the middle blowing gas storage bag can be recycled and used as a gas source for middle blowing and a gas source for pre-blowing to be output. The middle-blowing gas storage bag is provided with a one-way valve on a pipeline for supplying air pressure to the middle-blowing gas storage bag by high-pressure air through a pressure reducing valve, and the one-way valve is used for preventing the phenomenon that the pressure reducing valve leaks out, discharges and leaks air in the recovery process of the middle-blowing gas storage bag. The medium-pressure gas storage has larger capacity and is used for absorbing medium-pressure recovered gas. When the air source for pre-blowing is used, the pre-blowing passes through a pre-blowing valve pressure reducing valve, the pressure (15 BAR) of the middle return is regulated to a certain pre-blowing pressure (about 10 BAR), and the air enters the pre-blowing valve.
Because the middle-pressure gas storage bag is large enough, in the bottle blowing process, the middle-pressure gas storage bag decompresses and recovers the gas part in the formed bottle through the middle-pressure gas blowing and returning valve, and meanwhile, the middle-pressure gas storage bag charges middle-pressure gas to the bottle blown in the rear mould station through the middle-pressure gas blowing and returning valve, so that dynamic balance is formed. The pressure change of the medium-pressure gas storage bag is not large, generally about 15BAR is maintained, if the recovered gas is not consumed enough, the pressure is not up to 15BAR, and the pressure reducing valve from high-pressure gas is used for reducing the pressure of the medium-pressure gas storage bag to the medium-pressure gas storage bag so as to maintain the pressure of the medium-pressure gas storage bag 15BAR, thus ensuring that the medium-pressure gas storage bag is maintained above 15BAR.
The high-pressure gas supply source blows half-pressure gas into the low-pressure gas storage bag through the pressure reducing valve, namely a bottle blowing gas source of 30BAR is depressurized to low-pressure gas pressure (the pressure is about 7 BAR), and the pressure of the gas stored in the low-pressure gas storage bag is about 7 BAR. The low-pressure gas storage bag is provided with a one-way valve on a pipeline for supplying air pressure to the low-pressure gas storage bag by the high-pressure gas through the pressure reducing valve, and the one-way valve is used for preventing the phenomenon that the pressure reducing valve leaks out, discharges and leaks air in the recovery process of the low-pressure gas storage bag. The gas in the low-pressure gas storage bag can be recycled and used as the stretching gas of the stretching cylinder and the gas output by the blowing nozzle cylinder. Because the low-pressure gas storage bag has larger capacity, the low-pressure gas storage bag is used for absorbing low-pressure recovered gas and providing compressed gas of about 7BAR for the stretching cylinder and the blowing nozzle cylinder, and is used for stretching action of the stretching cylinder and up-and-down action of the blowing nozzle cylinder in the bottle blowing production process. The low-pressure air storage bag supplies air to the stretching cylinder and the blowing nozzle cylinder through the pressure reducing valve, and the one-way valve is used for stabilizing pressure.
The method disclosed by the invention is applied to bottle blowing production, and when the bottle is blown, compressed gas sequentially performs 6 actions of pre-blowing, middle blowing, high-pressure blowing, middle returning, recycling and exhausting by using 5 valves of a pre-blowing valve, a middle blowing and middle returning valve, a high-pressure blowing valve, a recycling valve and an exhausting valve respectively:
1. medium-pressure recovery gas and low-pressure recovery gas are introduced, medium-pressure recovery gas is subjected to medium-blowing and pre-blowing, and low-pressure recovery gas is used for stretching cylinder gas, so that the recovery is thorough.
2. The pressure of the medium blowing gas is 15-18BAR, after pre-blowing, the medium blowing pressure reaches about 15BAR, so that the high-pressure blowing only needs to pressurize the air pressure in the bottle from 15BAR to 30BAR, and the low-pressure recovery valve reduces the air consumption of the stretching cylinder and the blowing nozzle cylinder, so that the medium-pressure is higher, and the medium blowing pressure is higher, and can reach about 15-18BAR (the specific air pressure is related to the bottle capacity). Meanwhile, the method is better than four-valve six-step recovery, the middle blowing pressure and middle back pressure of the four-valve six-step are about 12BAR, the low-pressure recovery is used for pre-blowing, the low-pressure recovery pressure is about 10BAR, the middle blowing pressure is higher, thus the five-valve six-step bottle blowing process recovery effect is more obvious, middle blowing with higher pressure can be performed, the pressure difference of high-pressure blowing filling gas is reduced, the gas consumption is reduced, and lower energy consumption is realized.
As shown in fig. 1, the invention also discloses an energy-saving five-valve six-step bottle blowing device for realizing the energy-saving five-valve six-step bottle blowing method, which comprises the following steps: the device comprises a pre-blowing valve, a middle-blowing and middle-back valve, a high-pressure blowing valve, an exhaust valve, a recovery valve, a middle-blowing gas storage bag and a low-pressure gas storage bag, wherein a high-pressure gas supply source is respectively communicated with the middle-blowing gas storage bag and the low-pressure gas storage bag through two pressure reducing valves, the high-pressure gas supply source is communicated with the middle-blowing gas storage bag through the pressure reducing valves, the high-pressure gas supply source is communicated with the input end of the high-pressure blowing valve, the output end of the high-pressure blowing valve is communicated with a blowing nozzle and a compensation gas interface, the input end of the pre-blowing valve is communicated with the middle-blowing gas storage bag through the pressure reducing valve, the output end of the pre-blowing valve is communicated with a blowing nozzle and a compensation gas interface, the input end of the middle-blowing and middle-back valve is communicated with the middle-blowing gas storage bag through the pressure reducing valve, the output end of the middle-blowing and middle-back valve is communicated with the output end of the compensating gas storage bag, the output end of the high-pressure gas supply valve is communicated with the air cylinder and the air compensation cylinder through the pressure reducing valve, the output end of the air cylinder is communicated with the air inlet valve and the air-exhaust valve, and the air inlet valve is communicated with the air inlet valve.
The blowing nozzle is used for blowing gas into the bottle blank to perform pre-blowing, medium-blowing and high-pressure blowing; the compensating gas interface enters the die through a pipeline, and is specifically as follows: the pre-blowing, middle blowing and high-pressure blowing gas enters the movable left side die through the compensation gas port through the pipeline, cylinder thrust is formed in the airtight cavity between the left side die and the left die frame, the left side die is pushed to be tightly attached to the right side die, the left side die and the right side die are tightly attached, the left die and the right die are prevented from being separated and expanded in the blowing process, and the sizing cannot be performed.
The medium-pressure air storage bag is provided with a one-way valve on a pipeline for supplying air pressure to the medium-pressure air storage bag through a pressure reducing valve, the low-pressure air storage bag is provided with a one-way valve on a pipeline for supplying air pressure to the low-pressure air storage bag through a pressure reducing valve, and the one-way valve is used for preventing the medium-pressure air storage bag and the low-pressure air storage bag from generating outward air leakage, emission and air leakage phenomena of the pressure reducing valve in the recovery process.
The output end of the high-pressure blowing valve, the output end of the pre-blowing valve and the input end of the recovery valve are respectively provided with a one-way valve, and the one-way valves are used for preventing pre-blowing and high-pressure gas from being mutually connected. The input end and the output end of the middle blowing and middle returning valve can realize bidirectional air supply, and the pressure at one side is high, so that air flows from the side with high pressure to the side with low pressure, and the middle blowing and middle returning valve realizes two different processes of middle blowing and middle returning. The output end of the exhaust valve is connected with a silencer, and the silencer can effectively reduce noise generated during exhaust.
The electromagnetic pilot valves of the air vent valve, the recovery valve, the middle-blowing and middle-returning valve, the high-pressure blowing valve and the pre-blowing valve all comprise main valves and electromagnetic pilot valves, the input ends of the electromagnetic pilot valves of the air vent valve, the recovery valve, the high-pressure blowing valve, the middle-blowing and middle-returning valve and the pre-blowing valve are communicated with a pilot valve air supply source, pilot valve air is about 6BAR, the output ends of the electromagnetic pilot valves of the air vent valve, the recovery valve, the high-pressure blowing valve, the middle-blowing and middle-returning valve and the pre-blowing valve enter corresponding main valve control ports, when the electromagnetic pilot valves of the recovery valve, the middle-blowing and middle-returning valve, the high-pressure blowing valve and the pre-blowing valve are electrified, corresponding main valve passages are closed, when the electromagnetic pilot valves of the recovery valve, the middle-blowing and middle-returning valve and the high-pressure blowing valve are powered off, corresponding main valve passages are closed when the electromagnetic pilot valves are powered on, and corresponding main valves are closed.
The control of the passage and disconnection of the vent valve is as follows: when the electromagnetic exhaust pilot valve is powered off, the air in the bottle cavity and the die can be exhausted outwards through the pipeline by the main exhaust valve through the main exhaust valve passage. When the exhaust electromagnetic pilot valve is energized, the exhaust main valve is opened.
The pre-blow valve is controlled by the following steps: when the pilot valve of the pilot valve is electrified, the pilot valve is in a pilot valve channel, at the moment, the pilot gas (P1) enters the bottle cavity and the die through the pipe through the pilot valve to be pre-blown, and when the pilot valve is in power failure, the pilot valve is in a circuit breaking state. The high-pressure blowing valve and the pre-blowing valve are in the same path disconnection control process, and the details are not repeated.
The control process of the passage and the circuit breaking of the middle blowing and middle return valve during middle blowing is as follows:
when the pre-blowing is closed, after the pre-blowing is finished, the gas pressure in the bottle is only about 7BAR, the middle-blowing and middle-back valve is opened, the gas pressure in the middle-blowing gas storage bag is just regulated to be about 15BAR, at the moment, the gas in the middle-blowing gas storage bag is inflated into the bottle through a passage of the middle-blowing and middle-back valve, and the gas pressure in the bottle is increased from 7BAR to 15BAR, so that middle blowing is realized;
the control process of the passage and the circuit breaking of the middle blowing and middle returning valve during middle returning is as follows:
when the high-pressure valve is closed and the high-pressure blowing is finished, the gas pressure in the bottle is about 30BAR, the middle blowing and middle returning valve is opened, and then the gas in the bottle is inflated into the middle blowing gas storage bag through a passage of the middle blowing and middle returning valve, so that middle recovery is realized; because the capacity of the middle-blowing gas storage bag is larger than that of the bottle, the gas pressure in the bottle is reduced to about 15BAR, the middle-blowing gas storage bag receives the recovered gas in the front bottle and provides middle-blowing gas for the rear bottle, and meanwhile, the middle-blowing gas storage bag also provides gas supply for pre-blowing, and the gas pressure is about 10BAR after pressure regulation.
When the production is not carried out, the high-pressure air supply source supplies air to the middle blowing air storage bag through the pressure reducing valve, the air pressure is about 15BAR, the middle blowing air supply and the pre-blowing air supply are carried out in the production process, the air recovery in the front bottle is received, the dynamic balance is realized, the specific final pressure is more or less, the capacity of the produced bottle, the volume influence of the cavity and the valve structure in the blowing nozzle is realized, if no low-pressure recovered air supplies air to the stretching cylinder and the blowing nozzle cylinder, the middle blowing air storage bag also supplies air to the stretching cylinder and the blowing nozzle cylinder, the pressure in the middle blowing air storage bag is reduced to about 12BAR, the middle blowing pressure is reduced, the condition that the compressed air required to be consumed by the high-pressure blowing is increased to about 30BAR from 15BAR, and meanwhile, the pressure reducing valve connected with the middle blowing air storage bag also needs to supply air to the air storage tank, and the consumed compressed air is increased. The low-pressure recovery gas is added, medium-pressure recovery gas is subjected to medium-pressure blowing and pre-blowing, and is used for stretching the gas used by the gas cylinder and the gas used by the gas cylinder with the blowing nozzle, so that the recovery is thorough. The middle blowing and middle returning valve has 2 different functions, reduces the material and structural space of one valve, saves the hardware cost, reduces the cavity volume of the connected pipeline and valve, reduces the cavity volume when blowing bottles, and saves the gas.
The control process of the passage and the disconnection of the recovery valve is as follows:
when the middle return valve is closed, the gas pressure in the bottle is about 15BAR after the middle return is finished, the recovery valve is opened, the original state of the gas pressure in the low-pressure gas storage bag begins to be regulated to be about 7BAR, the gas in the bottle is inflated into the low-pressure gas storage bag through a passage of the recovery valve at the moment when the capacity of the low-pressure gas storage bag is enough larger than that of the bottle, the gas pressure in the low-pressure gas storage bag is slightly increased from 7BAR, the gas pressure in the bottle can be quickly reduced to be slightly more than 7BAR for recovery, and meanwhile, the low-pressure gas storage bag supplies gas to the stretching cylinder and the blowing nozzle cylinder, so that the recovery and the dynamic balance of the gas supply of the 7BAR pressure gas are realized, the gas pressure in the low-pressure gas storage bag is finally maintained at the pressure which is more than 7BAR, and the volume of the produced bottle and the cavity and the structure of the blowing nozzle are influenced.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (9)
1. An energy-saving five-valve six-step bottle blowing method is characterized by comprising the following steps:
step one: opening a pre-blowing valve, blowing pre-blowing gas in a pre-blowing gas path into a bottle blank through the pre-blowing valve, and enabling the pre-blowing gas to enter a die through a pipeline connected with a compensation gas interface, so that the die is balanced left and right, and the pre-blowing valve is closed when the process requirement is met;
step two: opening a middle blowing and middle returning valve, blowing middle blowing pressure gas in a middle blowing gas storage bag into a bottle blank through the middle blowing and middle returning valve, enabling the middle blowing pressure gas to enter a die through a pipeline connected with a compensation gas interface, balancing the left and right of the die, and closing the middle blowing valve after the time is finished;
step three: opening a high-pressure blowing valve, blowing high-pressure air in a high-pressure air path into a bottle blank through the high-pressure blowing valve, enabling the high-pressure air to enter a die through a pipeline connected with a compensation air interface, balancing the left and right of the die, and closing the high-pressure valve when the shape of the bottle blank is converted into a bottle;
step four: opening a middle blowing and middle returning valve, recycling the gas part in the formed bottle to the middle blowing gas storage bag and the gas dividing path, and then closing the middle blowing and middle returning valve;
step five: opening a recovery valve, recovering the residual gas in the formed bottle to a low-pressure gas storage bag and a low-pressure gas path, and then closing the recovery valve;
step six: an exhaust valve is opened to exhaust the residual gas in the bottle.
2. The energy-saving five-valve six-step bottle blowing method according to claim 1, wherein a high-pressure gas supply source is communicated with the middle-blowing gas storage bag and the low-pressure gas storage bag, before the step one, the high-pressure gas supply source stores middle-blowing gas of pressure into the middle-blowing gas storage bag through a pressure reducing valve, the high-pressure gas supply source stores middle-blowing gas of half pressure into the low-pressure gas storage bag through the pressure reducing valve, a one-way valve is arranged between the middle-blowing gas storage bag and the pressure reducing valve, and a one-way valve is arranged between the low-pressure gas storage bag and the pressure reducing valve.
3. The energy-saving five-valve six-step bottle blowing method according to claim 2, wherein the pre-blowing gas is provided by the pressure of the middle-blowing pressure gas in the middle-blowing gas storage bag through a pre-blowing valve pressure reducing valve.
4. The energy-saving five-valve six-step bottle blowing method according to claim 2, wherein the middle-blowing gas storage bag is used for recovering part of gas in the formed bottle in a decompression mode through the middle-blowing and middle-returning valve in the bottle blowing process, meanwhile, the middle-blowing and middle-returning valve is used for filling the bottle blank in the rear mould station, the gas pressure in the middle-pressure gas storage bag forms dynamic balance and is maintained at the middle-blowing pressure, if the gas pressure in the middle-blowing gas storage bag does not reach the middle-blowing pressure, the high-pressure gas supply source is used for supplying gas into the middle-blowing gas storage bag through the decompression valve so as to maintain the gas pressure in the middle-blowing gas storage bag as the middle-blowing pressure.
5. The energy-saving five-valve six-step bottle blowing method according to claim 2, wherein the low-pressure gas storage bag recovers medium-pressure gas in the bottle after the medium-pressure gas is recovered through the medium-pressure and medium-pressure return valve by opening the recovery valve, the recovered gas is used for gas for the stretching cylinder and the blowing nozzle cylinder, and the low-pressure gas storage bag supplies gas for the stretching cylinder and the blowing nozzle cylinder through the pressure reducing valve.
6. The energy-saving five-valve six-step bottle blowing method according to claim 5, wherein in the first step, the stretching cylinder is operated at the same time of pre-blowing, and the bottle blank is stretched to the bottom of the forming die by pulling the lifting rod, and the bottle blank is stretched while being pre-blown.
7. An energy-saving five-valve six-step bottle blowing device is used for realizing the energy-saving five-valve six-step bottle blowing method according to any one of claims 1-6, and is characterized by comprising a pre-blowing valve, a middle-blowing and middle-back valve, a high-pressure blowing valve, an exhaust valve, a recovery valve, a middle-blowing gas storage bag and a low-pressure gas storage bag, wherein a high-pressure gas supply source is respectively communicated with the middle-blowing gas storage bag and the low-pressure gas storage bag through two pressure reducing valves, the high-pressure gas supply source is communicated with an input end of the high-pressure blowing valve through the pressure reducing valve, an output end of the high-pressure gas supply source is communicated with an input end of the high-pressure blowing valve, the output end of the high-pressure blowing valve is communicated with a blowing nozzle and a compensating gas interface, middle-blowing pressure gas in the middle-blowing gas storage bag is provided with the pre-blowing through the pressure reducing valve, an output end of the pre-blowing valve is communicated with the compensating valve, the middle-blowing gas in the middle-blowing gas storage bag is communicated with the compensating gas storage bag through the pressure reducing valve, the output end of the high-pressure gas supply source is communicated with the compensating gas storage bag, the air inlet valve is communicated with the air inlet valve, the air outlet valve is communicated with the air inlet valve, and the air outlet valve is communicated with the air inlet valve.
8. The energy-saving five-valve six-step bottle blowing device according to claim 7, wherein the middle-blowing gas storage bag is provided with a one-way valve on a pipeline for supplying air pressure to the middle-blowing gas storage bag by a pressure reducing valve, the low-pressure gas storage bag is provided with a one-way valve on a pipeline for supplying air pressure to the low-pressure gas storage bag by the pressure reducing valve, and the one-way valve is used for preventing the outward leakage, discharge and leakage phenomena of the pressure reducing valve generated in the recovery process of the middle-blowing gas storage bag and the low-pressure gas storage bag; the output end of the high-pressure blowing valve, the output end of the pre-blowing valve and the input end of the recovery valve are respectively provided with a one-way valve, and the one-way valves are used for preventing pre-blowing and high-pressure gas from being mutually connected; the middle blowing and middle returning valve is used for supplying air in two directions.
9. The energy-saving five-valve six-step bottle blowing device according to claim 7, wherein the exhaust valve, the recovery valve, the middle-blowing and middle-returning valve, the high-pressure blowing valve and the pre-blowing valve all comprise main valves and electromagnetic pilot valves, the input ends of the electromagnetic pilot valves of the exhaust valve, the recovery valve, the high-pressure blowing valve, the middle-blowing and middle-returning valve and the pre-blowing valve are communicated with pilot valve gas supply sources for the power of the action of corresponding valve bodies, and the output ends of the electromagnetic pilot valves of the exhaust valve, the recovery valve, the high-pressure blowing valve, the middle-blowing and middle-returning valve and the pre-blowing valve enter corresponding main valve control ports, and when the electromagnetic pilot valves of the recovery valve, the middle-blowing and middle-returning valve, the high-pressure blowing valve and the pre-blowing valve are electrified, corresponding main valve passages; when the electromagnetic pilot valves of the recovery valve, the middle blowing and middle returning valve, the high-pressure blowing valve and the pre-blowing valve are powered off, the corresponding main valves are disconnected; when the electromagnetic pilot valve of the exhaust valve is powered off, the electromagnetic pilot valve corresponds to the main valve passage, gas is exhausted, and when the exhaust valve is powered on, the corresponding main valve is disconnected, and gas is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410093468.3A CN117719143A (en) | 2024-01-23 | 2024-01-23 | Energy-saving five-valve six-step bottle blowing method and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410093468.3A CN117719143A (en) | 2024-01-23 | 2024-01-23 | Energy-saving five-valve six-step bottle blowing method and device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117719143A true CN117719143A (en) | 2024-03-19 |
Family
ID=90205540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410093468.3A Pending CN117719143A (en) | 2024-01-23 | 2024-01-23 | Energy-saving five-valve six-step bottle blowing method and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117719143A (en) |
-
2024
- 2024-01-23 CN CN202410093468.3A patent/CN117719143A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2112969B1 (en) | Mold cooling by recovery of energy from spent compressed air in blow-molding process | |
| AU721562B2 (en) | Air working method and system for various drive units of stretch-blow molding machine | |
| WO2016033998A1 (en) | Bottle blowing structure and bottle blowing method | |
| US8287798B2 (en) | Method for blow-molding a packaging container using a gas and device for implementing same | |
| JP3422860B2 (en) | Method and apparatus for multiple use of working air | |
| GB2431372A (en) | Apparatus and method for blow moulding articles | |
| EP1905569B1 (en) | Apparatus and relative operating method for blow moulding plastic containers and recovering compressed blow moulding gas | |
| CN106273361B (en) | High pressure is insulated to generate | |
| CA2692499A1 (en) | Method for recycling energy in a blow moulding machine for blow moulding containers | |
| CN204095111U (en) | A kind of bottle blowing structure | |
| CN103148348A (en) | Electronic type CNG (Compressed Natural Gas) gas charging station sequence control panel | |
| CN101808802A (en) | Method for making containers comprising an intermediate depressurising operation | |
| CN101743114A (en) | Valve device for cavity blowing machines and method for injecting compressed air into a blowing volume | |
| CN117719143A (en) | Energy-saving five-valve six-step bottle blowing method and device thereof | |
| CN201544452U (en) | Gas recovery unit | |
| CN112212038A (en) | Blowing control device of bottle blowing machine integrated with four-in-one energy-saving valve set | |
| CN210911114U (en) | Seal integrative bottle blowing device of valve | |
| CN114103202B (en) | Energy-saving new energy vulcanizing system | |
| CN216032430U (en) | Air blowing control device for bottle blowing machine | |
| CN104162973B (en) | Blow-moulding machine with separate pressure pad device | |
| CN208101016U (en) | For controlling the valve group mechanism for blowing bottle high pressure gas | |
| CN108556311A (en) | For controlling the valve group mechanism for blowing bottle high pressure gas | |
| CN113565838A (en) | Cylinder exhaust energy-saving system and method based on strain energy accumulator | |
| CN209566487U (en) | A kind of energy-saving bottle blowing machine high pressure gas recycling accurate control device | |
| CN205991212U (en) | A kind of high pressure valve group device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |