CN113548788A - Gas pouring forming system and control method - Google Patents
Gas pouring forming system and control method Download PDFInfo
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- CN113548788A CN113548788A CN202111095778.1A CN202111095778A CN113548788A CN 113548788 A CN113548788 A CN 113548788A CN 202111095778 A CN202111095778 A CN 202111095778A CN 113548788 A CN113548788 A CN 113548788A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B9/00—Blowing glass; Production of hollow glass articles
- C03B9/30—Details of blowing glass; Use of materials for the moulds
- C03B9/40—Gearing or controlling mechanisms specially adapted for glass-blowing machines
- C03B9/41—Electric or electronic systems
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B9/00—Blowing glass; Production of hollow glass articles
- C03B9/13—Blowing glass; Production of hollow glass articles in gob feeder machines
- C03B9/14—Blowing glass; Production of hollow glass articles in gob feeder machines in "blow" machines or in "blow-and-blow" machines
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- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
The application relates to the technical field of glass manufacturing, in particular to a gas pouring forming system and a control method, and the method comprises the following steps of dividing set gas pouring forming time into a plurality of sampling periods with the same time, and setting the same pressure target value for bottle forming for each sampling period; when each sampling is finished, calculating an air pressure value error according to the difference value between the actual pressure value acquired in the sampling period and the pressure target value; calculating a gain value according to the sum of the air pressure value errors in the sampling period; and taking the average value of the gain values evenly divided in the rest sampling period as a correction value, and correcting the pressure target value until all sampling periods are sampled. The embodiment of the invention effectively solves the problem that the inverted blowing forming process is difficult to keep the output of inverted blowing with high precision.
Description
Technical Field
The invention relates to the technical field of glass manufacturing, in particular to a gas pouring forming system and a control method.
Background
In the glass bottling industry, the process of forming glass bottles is an important step therein. The glass forming of the bottle and jar refers to forming the melted glass material into various glass bottles and jars. Wherein the forming of the parison plays a very critical role in the overall process.
Generally, practitioners will use the air blowing method to form glass bottles and cans, and the inner hollow forming of the parison blank is the reverse air blowing forming process. The inverted blowing process generally requires blowing a solid glass gob into a preform having an interior void by compressed air in a few seconds. The traditional forming process is to press the air valve manually, the height of the blank is visually observed by human eyes, and then the inverted blowing forming process is utilized. However, because high-grade bottles and cans have high requirements on forming quality, the traditional manual air valve-pressing inverted blowing forming process cannot well control the manual valve-pressing proportion and cannot accurately visually measure the height of blanks, so that bottle bottom choke plug printing, two-material-saving phenomenon and poor finish are easily caused, and meanwhile, the requirements on manual technology are high, and the manual labor intensity is high. And the compressed air output in the air-pouring pipeline of the air-pouring device is unstable, and the air-pouring device needs to last for a certain time during air blowing forming. In practice, it is difficult to output the gas at the set pressure with high precision through the gas discharging pipeline of the gas discharging device. Therefore, even if the pressure output value is preset, it is difficult to maintain an accurate air pressure value in the air-bleeding pipeline of the air-bleeding device.
Disclosure of Invention
The embodiment of the application provides a down-blowing forming system and a control method, which aim to solve the problems that in the related technology, the down-blowing forming process is difficult to keep the output of high-precision down-blowing gas, so that the bottle bottom of a glass bottle is sealed, two materials are saved, and the smoothness is poor.
In one aspect, the invention provides a blow-down forming control method, which comprises the following steps:
dividing the set air-pouring forming time into a plurality of sampling periods with the same time, and setting the same pressure target value for bottle forming for each sampling period; when each sampling is finished, calculating an air pressure value error according to the difference value between the actual pressure value acquired in the sampling period and the pressure target value; calculating a gain value according to the sum of the air pressure value errors in the sampling period; and taking the average value of the gain values evenly divided in the rest sampling period as a correction value, and correcting the pressure target value until all sampling periods are sampled.
In some embodiments, the calculating, each time sampling is completed, an air pressure value error according to a difference between an actual pressure value collected in the sampling period and the pressure target value includes:
according to the formula:
P0=P1-P2
and obtaining an air pressure value error P0 in a sampling period, wherein P1 is a pressure target value of the bottle forming, and P2 is an actual pressure value P2 collected in the sampling period.
In some embodiments, the calculating the gain value based on the sum of the air pressure value errors over the sample period comprises:
according to the formula:
ΔP=P1×j-∑PIj
a gain value Δ P is obtained, where P1 is the target value for the pressure at which the can is formed, j is the number of sample cycles experienced, and Σ PIj is the sum of the actual pressure values over the sample cycles experienced.
In some embodiments, the correcting the pressure target value by using an average value of the gain values averaged over the remaining sampling periods as a correction value until all sampling periods are sampled includes:
according to the formula:
P3=P1+ΔP/(T1/T0-j)
and obtaining a pressure output value P3 of the next unexpired sampling period, wherein, Δ P is the gain value, P1 is the pressure target value of the bottle forming, T0 is the time of each sampling period, j is the number of elapsed sampling periods, T1 is the set air-entrapping forming time, and T1/T0 is the total number of sampling periods contained in the set air-entrapping forming time.
In some embodiments, the time T0 for each sampling period is 1 ms.
Another aspect provides a blow-down molding system comprising:
the electronic control module is used for dividing the set air-pouring forming time into a plurality of sampling periods with the same time and setting the same pressure target value for bottle and can forming for each sampling period;
and the controller module is used for calculating an air pressure value error according to the difference value between the actual pressure value acquired in the sampling period and the pressure target value when sampling is completed once, calculating a gain value according to the sum of the air pressure value errors in the sampling period, taking the average value of the gain value evenly divided in the rest sampling period as a correction value, and correcting the pressure target value until sampling in all the sampling periods is completed.
In some embodiments, the calculating a pressure value error according to a difference between an actual pressure value collected in the sampling period and the pressure target value every time sampling is completed includes:
according to the formula:
P0=P1-P2
and obtaining an air pressure value error P0 in a sampling period, wherein P1 is a pressure target value of the bottle forming, and P2 is an actual pressure value P2 collected in the sampling period.
In some embodiments, said calculating a gain value based on a sum of the air pressure value errors over the sample period comprises:
according to the formula:
ΔP=P1×j-∑PIj
a gain value Δ P is obtained where P1 is the target value for the pressure at which the can is formed, j is the number of sample cycles experienced and Σ PIj is the sum of the actual pressure values over the sample cycles experienced.
In some embodiments, the correcting the pressure target value by using an average value of the gain values averaged over the remaining sampling periods as a correction value until all sampling periods are sampled includes:
according to the formula:
P3=P1+ΔP/(T1/T0-j)
and obtaining a pressure output value P3 of the next sampling period, wherein Δ P is the gain value, P1 is the pressure target value of the bottle forming, T0 is the time of each sampling period, j is the number of the elapsed sampling periods, T1 is the set air-entrapping forming time, and T1/T0 is the total number of the sampling periods contained in the set air-entrapping forming time.
In some embodiments, further comprising:
the downdraft pipeline comprises a first pipeline and a second pipeline, the controller module is arranged on the first pipeline, a manual pressure reducing valve is arranged on the second pipeline, the first pipeline is communicated with the second pipeline through a T-shaped three-way valve and a gas storage device, and the first pipeline is communicated with the second pipeline through a blank.
The beneficial effect that technical scheme that this application provided brought includes:
(1) the air pressure value in the air-pouring pipeline is continuously adjusted in real time, so that the air pressure value in the air-pouring pipeline is gradually close to the target air pressure value, and the stability of air-pouring forming is ensured.
(2) The air pressure value is corrected by calculation, and the total accumulated error is divided into the following residual time, so that the pipeline cannot generate large air pressure change due to air pressure correction in a short time.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a control method of a gas purging system according to an embodiment of the present disclosure;
fig. 2 is a schematic view of a blow-down molding system according to an embodiment of the present application.
In the figure: 1. An electronic control module; 2. a controller module; 21. an electrical signal connector; 22. a signal line; 3. a blowback line; 4. and (5) primary blank.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In a first aspect, as shown in fig. 1, a control method of an inverted blowing system is provided, which includes:
and S1, dividing the set air-entrapping molding time into a plurality of sampling periods with the same time, and setting the same pressure target value for the bottle and can molding for each sampling period.
Specifically, a pressure target value of P1, a sampling period of T0ms and a gas pouring forming time of T1ms within each 1ms are set through an electronic control module of the gas pouring forming system, and the sampling period is not greater than the gas pouring forming time.
It should be noted that the air-vent forming time is the time it takes to form a glass bottle; sampling is carried out on the gas-pouring pipeline continuously and periodically when gas pouring is started, and the sampling period is the time spent on each sampling; the target pressure value P1 is a pressure value to be delivered per unit time that needs to be maintained in order to achieve the desired glass bottle forming effect. That is, the product of the target pressure P1 and the blow-down molding time T1ms is the total pressure required for each glass bottle to be molded. However, the air dumping system cannot output compressed air according to the set target value well, so that the actual pressure value and the set pressure value have certain access, and the technical scheme of the invention aims to reduce the errors and access.
Preferably, the sampling period time may be set to 1ms, generally taking 1ms as a unit time.
And S2, calculating the air pressure value error according to the difference between the actual pressure value collected in the sampling period and the pressure target value when each sampling is completed.
It should be noted that the pressure value P2 actually output in the air bleeding line is largely different from the set target pressure value P1 as described above.
Specifically, according to the formula:
P0=P1-P2
and obtaining an air pressure value error P0 in a sampling period, wherein P1 is a pressure target value of the bottle forming, and P2 is an actual pressure value P2 collected in the sampling period.
And S3, calculating a gain value according to the sum of the air pressure value errors of the elapsed sampling periods.
According to the formula:
ΔP=P1×j-∑PIj
a gain value Δ P is obtained, where P1 is the target value for the pressure at which the can is formed. j is the number of sample cycles experienced. Σ PIj is the sum of the actual pressure values over the elapsed sampling periods, and Σ PIj is the sum of the different actual pressure values acquired over all the elapsed sampling periods mentioned above.
It will be appreciated that the gain Δ P is a cumulative value of variation, since the reverse air system starts sampling from the beginning of reverse air blowing, and the gain Δ P will vary accordingly after the end of each sampling period following the actual pressure variation in the reverse air line, and is the sum of the air pressure error values obtained over all the sampling periods.
And S4, taking the average value of the gain values averaged over the rest sampling periods as a correction value, and correcting the pressure target value until all sampling periods are sampled.
Specifically, according to the formula:
P3=P1+ΔP/(T1/T0-j)
obtaining a pressure output value P3 of the next non-sampling period, wherein, Δ P is the gain value, P1 is the pressure target value of the bottle forming, T0 is the time of each sampling period, j is the number of the sampling periods passing, and T1 is the set air-out forming time. T1/T0 is the total number of sampling cycles in the whole blow-down molding time.
And repeating the operation until the air-bleeding forming time T1 is used up, and stopping air-bleeding delivery.
It should be noted that, in the conventional barometric pressure adjustment, the gain value of one sampling period is directly and completely supplemented into the next sampling period at the end of the sampling period, that is, the error of the previous sampling period is directly and completely supplemented into the next sampling period after each sampling period. This results in a large pressure change in the vent line in a short time, which adversely affects the vent line and the molding of the blank. Therefore, another way is adopted in the technical solution of the present invention, as shown in the calculation formula of P3, the accumulated gain value Δ P is recalculated each time a sampling period error is obtained, and the gain value Δ P is averagely allocated to the subsequent delivery of the air pressure value per unit time, where (T1/T0-j) is the number of sampling periods that have not elapsed in the whole air-bleeding molding time T1.
The adjustment process is a continuous fine adjustment process. That is, at the end of each sampling cycle, the corresponding system pressure output set point is adjusted to P3, but the pressure output set point P3 is not the target pressure value P1 nor the actual pressure value P2 in the line. The system continuously approximates the actual pressure value P3 per unit time to the target pressure value P1 by continuously assigning the accumulated gain value ap to each unit time remaining subsequently. Meanwhile, the air pressure change is averagely distributed to each unit time, so that the air pressure value in the air dumping pipeline does not fluctuate greatly in a short time, and the negative effect is small.
The present invention also provides a preferred embodiment of the control method, as follows:
the molding pressure target value P1 was set, the sampling period was set to 1ms, and the blow-down molding time was set to T1. That is, the sampling period is set to a unit time, simplifying the calculation process.
Starting gas pouring and conveying, and measuring the actual pressure value P2 of each 1ms in the gas pouring and forming system in real time;
according to the formula:
ΔP=P1×j-∑PIj
a gain value Δ P is obtained that is the sum of the air pressure errors of the blow-down molding system over j cycles, where j is the number of sample cycles that the blow-down molding system has elapsed since the start of blow-down delivery, and Σ PIj is the sum of the actual pressure values P2 measured every 1ms (i.e., within one sample cycle time) over j sample cycle times.
Then according to the formula:
P3=P1+ΔP/(T1-j)
and obtaining a pressure output set value P3 in the air-bleeding forming system per unit time.
The above operations are repeated until the T1 sampling period is completed, and the reverse air delivery is stopped.
As shown in fig. 2, the present invention also provides a blow-down molding system, comprising:
the electronic control module 1 is used for dividing the set air-pouring forming time into a plurality of sampling periods with the same time and setting the same pressure target value for bottle and can forming for each sampling period;
and the controller module 2 is used for calculating an air pressure value error according to the difference value between the actual pressure value acquired in the sampling period and the pressure target value when sampling is completed once, calculating a gain value according to the sum of the air pressure value errors in the experienced sampling period, and correcting the pressure target value by taking the average value of the gain value evenly divided in the rest sampling period as a correction value until sampling in all sampling periods is completed.
And the air blowback pipeline 3 comprises a first pipeline and a second pipeline, the first pipeline is provided with the controller module, the second pipeline is provided with a manual pressure reducing valve, and the first pipeline and the second pipeline are communicated with the air storage device through a T-shaped three-way valve.
It is worth to be noted that the first pipeline is controlled by the controller module to execute the control method to blow air into the embryo chamber. When the first line is not available by accident. The emergency switching can be performed through a T-shaped three-way valve, and a second pipeline is started and used as a standby device, wherein the second pipeline is a conventional manual air blowing pipeline.
It will be appreciated that the electrical signal connector 21 on the controller module 2 is connected to the electronic control module 1 via a signal line 22. The controller module 2 blows air to the primary blank 4 in the blank chamber through the inverted air blowing pipeline 3.
In summary, the technical scheme provided by the application has the beneficial effects that different types of glass tubes or other molded products can be dealt with by adjusting the gas-pouring molding time and setting the target value of the system. Meanwhile, the problem of large entrance and exit of the actual pressure and the pressure target value in the air vent pipeline is solved by measuring the actual pressure value P2 and the pressure target value P1 of the air vent and continuously adjusting the output set value P3 in the air vent. In addition, the control method in the scheme averagely distributes the calculated pressure error to subsequent pressure output, and continuously modifies the distributed pressure value through sampling, so that the actual pressure value in the gas pouring pipeline is continuously close to the pressure target value P1, and the negative influence of large air pressure change on gas pouring forming after one-time sampling is avoided.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of controlling a blow-down molding system, comprising:
dividing the set air-pouring forming time into a plurality of sampling periods with the same time, and setting the same pressure target value for bottle forming for each sampling period;
when each sampling is finished, calculating an air pressure value error according to the difference value between the actual pressure value acquired in the sampling period and the pressure target value;
calculating a gain value according to the sum of the air pressure value errors in the sampling period;
and taking the average value of the gain values evenly divided in the rest sampling period as a correction value, and correcting the pressure target value until all sampling periods are sampled.
2. The control method of claim 1, wherein calculating the air pressure error according to the difference between the actual pressure value collected in the sampling period and the pressure target value every time the sampling is completed comprises:
according to the formula:
P0=P1-P2
and obtaining an air pressure value error P0 in a sampling period, wherein P1 is a pressure target value of the bottle forming, and P2 is an actual pressure value P2 collected in the sampling period.
3. The control method of claim 1, wherein said calculating a gain value based on a sum of the air pressure value errors over the elapsed sampling period comprises:
according to the formula:
ΔP=P1×j-∑PIj
a gain value Δ P is obtained, where P1 is the target value for the pressure at which the can is formed, j is the number of sample cycles experienced, and Σ PIj is the sum of the actual pressure values over the sample cycles experienced.
4. The control method according to claim 1, wherein said correcting the pressure target value with the average value of the gain values averaged over the remaining sampling periods as a correction value until all sampling periods are sampled comprises:
according to the formula:
P3=P1+ΔP/(T1/T0-j)
and obtaining a pressure output value P3 of the next unexpired sampling period, wherein, Δ P is the gain value, P1 is the pressure target value of the bottle forming, T0 is the time of each sampling period, j is the number of elapsed sampling periods, T1 is the set air-entrapping forming time, and T1/T0 is the total number of sampling periods contained in the set air-entrapping forming time.
5. The control method according to claim 4, characterized in that:
the time T0 for each sampling period is 1 ms.
6. A blow-down molding system, comprising:
the electronic control module (1) is used for dividing the set air-pouring forming time into a plurality of sampling periods with the same time and setting the same pressure target value for bottle and can forming for each sampling period;
and the controller module (2) is used for calculating an air pressure value error according to the difference value between the actual pressure value acquired in the sampling period and the pressure target value when sampling is completed once, calculating a gain value according to the sum of the air pressure value errors in the experienced sampling period, taking the average value of the gain value on the rest sampling periods as a correction value, and correcting the pressure target value until sampling in all the sampling periods is completed.
7. The blow-down molding system according to claim 6, wherein said system is configured to calculate an air pressure error according to a difference between an actual pressure value collected during the sampling period and the target pressure value every time a sampling is completed, and comprises:
according to the formula:
P0=P1-P2
and obtaining an air pressure value error P0 in a sampling period, wherein P1 is a pressure target value of the bottle forming, and P2 is an actual pressure value P2 collected in the sampling period.
8. The blow-down molding system of claim 6, wherein calculating the gain value based on the sum of the air pressure value errors over the sample period comprises:
according to the formula:
ΔP=P1×j-∑PIj
a gain value Δ P is obtained where P1 is the target value for the pressure at which the can is formed, j is the number of sample cycles experienced and Σ PIj is the sum of the actual pressure values over the sample cycles experienced.
9. The blow-down molding system according to claim 6, wherein the correcting the pressure target value with the average of the gain values averaged over the remaining sampling periods as a correction value until all sampling periods are sampled comprises:
according to the formula:
P3=P1+ΔP/(T1/T0-j)
and obtaining a pressure output value P3 of the next sampling period, wherein Δ P is the gain value, P1 is the pressure target value of the bottle forming, T0 is the time of each sampling period, j is the number of the elapsed sampling periods, T1 is the set air-entrapping forming time, and T1/T0 is the total number of the sampling periods contained in the set air-entrapping forming time.
10. The blow-down molding system of claim 6, further comprising:
the inverted blowing pipeline (3) comprises a first pipeline and a second pipeline, the first pipeline is provided with the controller module (2), the second pipeline is provided with a manual pressure reducing valve, the first pipeline is communicated with the second pipeline through a T-shaped three-way valve and a gas storage device, and the first pipeline is communicated with the second pipeline through a blank (4).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB0205541D0 (en) * | 2001-04-10 | 2002-04-24 | Emhart Glass Sa | Control for a machine such as an I.S. machine |
| CN1852867A (en) * | 2003-09-19 | 2006-10-25 | 日本山村硝子株式会社 | Glass-forming machine |
| CN103488082A (en) * | 2013-09-10 | 2014-01-01 | 温州大学 | Control method of high-efficiency variable frequency constant pressure water supply system based on inverse solution method |
| CN110790480A (en) * | 2019-10-30 | 2020-02-14 | 浙江华兴玻璃有限公司 | High-efficient blanking gas blowing device for determinant bottle-making machine |
| CN113093524A (en) * | 2021-04-01 | 2021-07-09 | 北京氢澜科技有限公司 | Method, device and equipment for controlling hydrogen stacking pressure of fuel cell engine |
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2021
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0205541D0 (en) * | 2001-04-10 | 2002-04-24 | Emhart Glass Sa | Control for a machine such as an I.S. machine |
| CN1852867A (en) * | 2003-09-19 | 2006-10-25 | 日本山村硝子株式会社 | Glass-forming machine |
| CN103488082A (en) * | 2013-09-10 | 2014-01-01 | 温州大学 | Control method of high-efficiency variable frequency constant pressure water supply system based on inverse solution method |
| CN110790480A (en) * | 2019-10-30 | 2020-02-14 | 浙江华兴玻璃有限公司 | High-efficient blanking gas blowing device for determinant bottle-making machine |
| CN113093524A (en) * | 2021-04-01 | 2021-07-09 | 北京氢澜科技有限公司 | Method, device and equipment for controlling hydrogen stacking pressure of fuel cell engine |
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