CN110281515B - Thin-walled tube width control system - Google Patents
Thin-walled tube width control system Download PDFInfo
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- CN110281515B CN110281515B CN201910576655.6A CN201910576655A CN110281515B CN 110281515 B CN110281515 B CN 110281515B CN 201910576655 A CN201910576655 A CN 201910576655A CN 110281515 B CN110281515 B CN 110281515B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/78—Measuring, controlling or regulating
- B29C49/783—Measuring, controlling or regulating blowing pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
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- Manufacturing & Machinery (AREA)
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Abstract
The invention belongs to the field of control systems, and particularly provides a thin-walled tube width control system which comprises a machine body, a fan and an air disc, wherein a film outlet is formed in the machine body and used for blowing out a thin-walled tube; further comprising: the distance measuring sensor is used for detecting the distance from the distance measuring sensor to the thin-walled tube; the controller is electrically connected with the distance measuring sensor and the fan, and a maximum ideal distance value and a minimum ideal distance value are prestored in the controller; and after receiving the distance value sent by the distance measuring sensor, the controller compares the distance value with a pre-stored maximum ideal distance value and a pre-stored minimum ideal distance value, controls the fan to reduce the wind power if the distance value is smaller than the minimum ideal distance value, and controls the fan to increase the wind power if the distance value is larger than the maximum ideal distance value. The invention can automatically adjust the wind power of the fan, so that the air pressure in the thin-wall pipe is maintained within an ideal value range.
Description
Technical Field
The invention belongs to the field of control systems, and particularly relates to a thin-walled tube width control system.
Background
The main structure of the existing film blowing machine comprises a machine body, a fan and an air disc; the machine body is provided with a feed hopper and a film outlet, and the cross section of the film outlet is circular; the fan is fixed on the organism, and the air outlet intercommunication of tuber pipe and fan is passed through to the windpipe, and the tuber pipe passes the upper plate of organism, and it has a plurality of ventilation holes to open on the windpipe, and the windpipe dustcoat has the wind post, and the wind post is the aerial cylinder that the upper end was sealed, and the lower extreme of wind post is fixed on the upper plate of organism, and the wind post lower extreme is located the ring at play membrane mouth place, and even division has a plurality of exhaust vents on the wind post.
The raw material enters the machine body from the feed hopper and is blown out from the film outlet to form a cylindrical film, namely a thin-walled tube. The wind column is covered in the thin-wall pipe, wind power blown out by the fan blows into the wind column through the ventilation holes on the wind disc and then blows out from the air outlet holes on the wind column, and therefore the wind power blown into the thin-wall pipe is stable and uniform, and air pressure in the thin-wall pipe can be well maintained. The upper end of the formed thin-walled tube is pulled upwards by two pulling rolls.
However, after the fan is adjusted to the optimal wind power, due to the self heating of the fan and other reasons, the real wind power of the fan is not kept at the optimal wind power, but is shifted within a wind power range, so that the air pressure in the thin-wall tube fluctuates, but the thin film is thin and light in weight, and the width of the thin-wall tube changes due to a small change of the air pressure in the thin-wall tube, so that the thickness and transparency of the thin film change, and defective products easily occur in the thin film.
Disclosure of Invention
The invention aims at the problems and provides a thin-wall pipe width control system.
The basic scheme provided by the invention is as follows:
the thin-walled tube width control system comprises a machine body, a fan and an air disc, wherein a film outlet is formed in the machine body and used for blowing out a thin-walled tube; further comprising:
the distance measuring sensor is used for detecting the distance from the distance measuring sensor to the thin-walled tube;
the controller is electrically connected with the distance measuring sensor and the fan, and a maximum ideal distance value and a minimum ideal distance value are prestored in the controller;
and after receiving the distance value sent by the distance measuring sensor, the controller compares the distance value with a pre-stored maximum ideal distance value and a pre-stored minimum ideal distance value, controls the fan to reduce the wind power if the distance value is smaller than the minimum ideal distance value, and controls the fan to increase the wind power if the distance value is larger than the maximum ideal distance value.
Basic scheme theory of operation and beneficial effect:
because the distance between the distance measuring sensor and the wind plate is fixed, the distance between the distance measuring sensor and the thin-walled tube is detected through the distance measuring sensor, so that the inner diameter of the thin-walled tube can be known, namely, the smaller the distance between the distance measuring sensor and the thin-walled tube is, the larger the inner diameter of the thin-walled tube is.
The controller is pre-stored with a maximum ideal distance value and a minimum ideal distance value, and after receiving the distance value sent by the distance measuring sensor, the controller compares the distance value with the maximum ideal distance value and the minimum ideal distance value. If the distance value is within the range of the maximum ideal distance value and the minimum ideal distance value, the inner diameter of the thin-wall pipe is ideal, and the wind power of the fan is not required to be adjusted.
If the distance value received by the controller is smaller than the minimum ideal distance value, the inner diameter of the thin-wall pipe is larger, and the internal air pressure of the thin-wall pipe needs to be reduced, so that the controller controls the fan to reduce the wind power.
Similarly, if the distance value received by the controller is greater than the maximum ideal distance value, it indicates that the inner diameter of the thin-walled pipe is smaller, and the internal air pressure of the thin-walled pipe needs to be increased, so that the controller controls the fan to increase the wind power.
Thus, the air pressure in the thin-wall pipe can be maintained within a stable range, and the inner diameter of the thin-wall pipe is further maintained within a desired range.
Further, the alarm device is electrically connected with the controller; after the controller controls the fan to increase or decrease wind power, if the distance value received by the controller is always smaller than the minimum ideal distance value or always larger than the maximum ideal distance value after 20-80 seconds, the controller controls the alarm to give an alarm.
After the controller controls the fan to change wind power, under normal conditions, the air pressure in the thin-wall pipe can change correspondingly, the distance measured by the distance measuring sensor can also change, and if the distance value received by the controller is always smaller than the minimum ideal distance value or is always larger than the maximum ideal distance value within 20-80 seconds later, the situation of the machine is indicated, and workers need to be informed. At this time, the controller controls the alarm to give an alarm.
Furthermore, the alarm is an audible and visual alarm.
The audible and visual alarm gives an alarm in a mode of sound and light, and can sufficiently attract the attention of workers under the double stimulation of vision and hearing.
Further, the controller comprises a receiving module, a judging module, an executing module and a storage module;
the receiving module is used for receiving the distance value sent by the distance measuring sensor;
the judging module is used for comparing the received distance value with the maximum ideal distance value and the minimum ideal distance value;
the execution module is used for controlling the wind power of the fan;
the storage module is used for storing the maximum ideal distance value and the minimum ideal distance value, and is also used for storing the time for controlling the fan to reduce the wind power by the execution module and the time for controlling the fan to increase the wind power by the execution module.
Like this, the staff can know the stability of machine work through looking over the time that control fan reduced wind-force in the storage module to and the time of execution module control fan increase fan wind-force, be convenient for in time maintain.
Further, the controller also comprises a timing module which is used for calculating and storing the accumulated working hours and the continuous working hours of the machine body.
The noun explains: accumulating working hours, namely accumulating working time; continuous working hours, and continuous working hours.
Through the timing module, whether staff can know the machine and need have a rest, maintain.
Further, the storage module is also internally prestored with an accumulated maximum value and a continuous maximum value; the controller also comprises a reminding module;
the judging module is also used for comparing the accumulated working hours with the accumulated maximum value and comparing the continuous working hours with the continuous maximum value;
the reminding module is used for sending out a reminding when the judging module judges that the accumulated working hours exceed the accumulated maximum value or the continuous working hours exceed the continuous maximum value.
When the accumulated working hours of the machine body exceed the accumulated maximum value or the continuous working hours exceed the continuous maximum value, the machine body needs to have a rest or be maintained, and at the moment, the reminding module sends out a reminder to enable a worker to know the situation.
Furthermore, the reminding mode of the reminding module is voice plus characters.
The voice mode can draw the attention of the staff, and the combination of the text mode can make the impression of the staff more profound and more important.
Further, the distance measuring sensor is a laser distance measuring sensor.
Compared with an infrared distance measuring sensor, the laser distance measuring sensor has higher precision.
Further, the probe of the ranging sensor faces the axis of the wind disk.
The distance between the thin-walled tube and the measured distance can reflect the inner diameter of the thin-walled tube more accurately.
Further, the controller is a PLC controller.
Compared with a single chip microcomputer, the PLC is more suitable for industrial application.
Drawings
FIG. 1 is a schematic structural diagram of a thin-walled tube width control system according to a first embodiment of the present invention;
fig. 2 is a logic block diagram of a thin-walled tube width control system according to a first embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the wind power generation device comprises a machine body 1, a thin-wall pipe 2, a wind disk 3, a wind pipe 4, a wind column 5 and a distance measuring sensor 6.
Example one
As shown in fig. 1 and 2:
the thin-walled tube width control system comprises a machine body 1, a fan and a wind disc 3, wherein a film outlet is formed in the upper plate of the machine body 1, the cross section of the film outlet is circular, and the film outlet is used for blowing out a thin-walled tube 2; the fan is arranged on the machine body 1 through bolts; the air disk 3 is a hollow cylinder with the upper end sealed, the air disk 3 is communicated with an air outlet of the fan through an air pipe 4, the air pipe 4 passes through an upper plate of the machine body 1, the upper end of the air pipe 4 is bonded and communicated with the air disk 3, and the lower end of the air pipe 4 is bonded and communicated with the air outlet of the fan.
It has four ventilation holes to open on the lateral wall of wind dish 3, and wind 3 dustcoats there is wind post 5, and wind post 5 is the aerial cylinder that the upper end was sealed, and the lower extreme of wind post 5 bonds on the upper plate of organism 1, and the lower extreme of wind post 5 is located the ring at play membrane mouth place, and even opening has six rings of air outlet on the lateral wall of wind post 5.
Also comprises a controller, a distance measuring sensor 6 and an audible and visual alarm.
The probe of range finding sensor 6 is towards the axis of winddisk 3, and in this embodiment, range finding sensor 6 is laser range finding sensor, and the model is the H-PT50 of being produced by Wuhan hongcheng high-tech limited, and the laser range finding sensor precision of this model is high, and the reaction is fast.
The distance measuring sensor 6 is electrically connected with the controller, and a probe of the distance measuring sensor 6 faces the axis of the wind disk 3, so that the measured distance from the thin-wall pipe 2 can reflect the inner diameter of the thin-wall pipe 2 more accurately.
The alarm is electrically connected with the controller, the alarm is an audible and visual alarm, in the embodiment, the audible and visual alarm is a Yiyu-02 model of a benefit brand, and the audible and visual alarm of the model has enough brightness and is audible and can immediately attract the attention of workers.
The controller is a PLC controller, and in the embodiment, the controller is a Siemens brand 6ED1052-1HB08-0BA0 model.
The controller comprises a receiving module, a timing module, a judging module, an executing module, a storage module and a reminding module.
The receiving module is used for receiving the distance value sent by the distance measuring sensor 6.
The timing module is used for calculating and storing the accumulated working hours and the continuous working hours of the machine body 1.
The judging module is used for comparing the received distance value with the maximum ideal distance value and the minimum ideal distance value; and the controller is also used for comparing the accumulated working hours with the accumulated maximum value and comparing the continuous working hours with the continuous maximum value.
The execution module is used for controlling the wind power of the fan and controlling the alarm to give an alarm.
The storage module stores a maximum ideal distance value, a minimum ideal distance value, an accumulated maximum value and a continuous maximum value; the storage module is also used for storing the time for controlling the fan to reduce the wind power by the execution module and controlling the time for increasing the wind power of the fan by the execution module.
The reminding module is used for sending out a reminding when the judging module judges that the accumulated working hours exceed the accumulated maximum value or the continuous working hours exceed the continuous maximum value, and in the embodiment, the reminding mode is voice and characters.
After receiving the distance value sent by the distance measuring sensor 6, the judging module compares the distance value with the pre-stored maximum ideal distance value and the pre-stored minimum ideal distance value, if the distance value is smaller than the minimum ideal distance value, the executing module controls the fan to reduce the wind power, and if the distance value is larger than the maximum ideal distance value, the executing module controls the fan to increase the wind power. The specific value of the wind power is adjusted according to the deviation of the distance value, and the skilled person can specifically set the value according to the specific model.
After the execution module controls the fan to increase or decrease wind power, if the distance value received by the receiving module is always smaller than the minimum ideal distance value or always larger than the maximum ideal distance value in the last 40 seconds, the execution module controls the alarm to give an alarm.
The specific implementation process comprises the following steps:
after receiving the distance value sent by the distance measuring sensor 6, the controller compares the distance value with the maximum ideal distance value and the minimum ideal distance value. If the distance value is within the range of the maximum ideal distance value and the minimum ideal distance value, the inner diameter of the thin-wall pipe 2 is within the ideal range, and the wind power of the fan is not required to be adjusted.
If the distance value received by the controller is smaller than the minimum ideal distance value, the inner diameter of the thin-wall pipe 2 is larger, and the internal air pressure of the thin-wall pipe 2 needs to be reduced, so that the controller controls the fan to reduce the wind power. Similarly, if the distance value received by the controller is greater than the maximum ideal distance value, it indicates that the inner diameter of the thin-walled tube 2 is smaller, and the internal air pressure of the thin-walled tube 2 needs to be increased, so that the controller controls the fan to increase the wind power.
After the execution module controls the fan to change wind power, under normal conditions, the air pressure in the thin-wall pipe 2 changes correspondingly, the distance measured by the distance measuring sensor 6 also changes, and if the distance value received by the receiving module is always smaller than the minimum ideal distance value or always larger than the maximum ideal distance value within the following 40 seconds, the situation of the machine is indicated, and workers need to be informed. At the moment, the controller controls the alarm to give out an alarm, in the embodiment, the audible and visual alarm gives an alarm in a mode of sound and light, and the audible and visual stimulation is enough to attract the attention of workers. The worker can stop the operation of the machine and overhaul it.
The staff can know the job stabilization nature of organism 1 and fan through looking over the time that the control fan reduced wind-force in the module storage module to and the time of execution module control fan increase fan wind-force, be convenient for in time maintain.
When the accumulated working hours of the machine body 1 exceed the accumulated maximum value or the continuous working hours exceed the continuous maximum value, the reminding module sends out a text and voice reminding to enable a worker to know the situation.
Example two
Compared with the first embodiment, in the present embodiment, the inner diameter of the lower half part of the wind disk 3 is larger than that of the upper half part. The external diameter of tuber pipe 4 is greater than 3 first half internal diameters of winddisk, and is less than 3 latter half internal diameters of winddisk, and the upper end of ventilation pipe 4 is located winddisk 3 and with winddisk 3's the latter half swing joint.
The upper half of the air plate 3 is provided with four vent holes, the four vent holes are as large as the height, the distance between any two vent holes is equal, and the vent holes are inclined downwards in the direction outward from the axis of the air plate 3. Two air leakage holes are formed in the lower half portion of the air disc 3, the two air leakage holes are equal in height and are equal in size, the air leakage holes face horizontally, and the upper end of each air leakage hole is three millimeters away from the top end of the lower half portion of the air disc 3.
The vent holes in the winddisk 3 are sometimes clogged with impurities after a period of use. When the wind hole is blockked up, the unable outside air-out in this wind hole, under the condition that the wind-force of fan keeps unchangeable, atmospheric pressure in the wind dish 3 can increase, behind the atmospheric pressure increase, wind dish 3 can upwards slide on ventilation pipe 4, after the sliding distance exceeded three millimeters, expose the hole of letting out wind, the hole of letting out wind exposes the back, the ventilation hole that does not plug up outwards air-out together with the hole of letting out wind, the atmospheric pressure in the wind dish 3 reduces, wind dish 3 slides down, fall back on ventilation pipe 4.
Thus, even if a vent hole is blocked, the air pressure in the duct 4 can be kept relatively stable by the vertical sliding of the air disk 3.
Meanwhile, since a certain air hole is blocked, the air plate 3 does not vertically slide up and down but rotates and slides up and down when sliding up and down. Thus, the air volume in each direction in the air duct 4 can be more uniform. Moreover, when the wind disk 3 rotates and slides up and down, the wind disk can collide with the ventilation pipe 4 every time the wind disk slides down, and because the ventilation holes incline downwards in the direction outward from the axis of the wind disk 3, impurities in the ventilation holes can be shaken off outwards every time the wind disk collides.
When the impurity becomes flexible, continue to tremble and add the inside wind pressure of wind dish 3, can outwards clear away the impurity in the ventilation hole is whole.
By using the system, when the vent hole on the air disc 3 is blocked, the system still can work relatively stably and can dredge the vent hole in work.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. The thin-walled tube width control system comprises a machine body, a fan and an air disc, wherein a film outlet is formed in the machine body and used for blowing out a thin-walled tube; it is characterized by also comprising:
the distance measuring sensor is used for detecting the distance from the distance measuring sensor to the thin-walled tube;
the controller is electrically connected with the distance measuring sensor and the fan, and a maximum ideal distance value and a minimum ideal distance value are prestored in the controller;
after receiving the distance value sent by the distance measuring sensor, the controller compares the distance value with a pre-stored maximum ideal distance value and a pre-stored minimum ideal distance value, if the distance value is smaller than the minimum ideal distance value, the fan is controlled to reduce wind power, and if the distance value is larger than the maximum ideal distance value, the fan is controlled to increase wind power;
the air disc is a hollow cylinder with the upper end sealed, and is communicated with an air outlet of the fan through an air pipe;
the inner diameter of the lower half part of the wind disk is larger than that of the upper half part; the outer diameter of the air pipe is larger than the inner diameter of the upper half part of the air disc and smaller than the inner diameter of the lower half part of the air disc, and the upper end of the air pipe is positioned in the air disc and is movably connected with the lower half part of the air disc;
the upper half part of the wind disk is provided with four vent holes, the four vent holes are equal in height, the distance between any two vent holes is equal, and the vent holes are inclined downwards in the direction from the axis of the wind disk to the outside; the lower half portion of the air disc is provided with two air leakage holes, the two air leakage holes are equal in height and are equal in size, the air leakage holes face horizontally, and the upper ends of the air leakage holes are three millimeters away from the top end of the lower half portion of the air disc.
2. The thin walled tube width control system of claim 1, wherein: the alarm is electrically connected with the controller; after the controller controls the fan to increase or decrease wind power, if the distance value received by the controller is always smaller than the minimum ideal distance value or always larger than the maximum ideal distance value after 20-80 seconds, the controller controls the alarm to give an alarm.
3. The thin walled tube width control system of claim 2, wherein: the alarm is a sound-light alarm.
4. The thin walled tube width control system of claim 3, wherein: the controller comprises a receiving module, a judging module, an executing module and a storage module;
the receiving module is used for receiving the distance value sent by the distance measuring sensor;
the judging module is used for comparing the received distance value with the maximum ideal distance value and the minimum ideal distance value;
the execution module is used for controlling the wind power of the fan;
the storage module is used for storing the maximum ideal distance value and the minimum ideal distance value, and is also used for storing the time for controlling the fan to reduce the wind power by the execution module and the time for controlling the fan to increase the wind power by the execution module.
5. The thin walled tube width control system of claim 4, wherein: the controller also comprises a timing module which is used for calculating and storing the accumulated working hours and the continuous working hours of the machine body.
6. The thin walled tube width control system of claim 5, wherein: the storage module is also internally prestored with an accumulated maximum value and a sustained maximum value; the controller also comprises a reminding module;
the judging module is also used for comparing the accumulated working hours with the accumulated maximum value and comparing the continuous working hours with the continuous maximum value;
the reminding module is used for sending out a reminding when the judging module judges that the accumulated working hours exceed the accumulated maximum value or the continuous working hours exceed the continuous maximum value.
7. The thin walled tube width control system of claim 6, wherein: the reminding mode of the reminding module is voice plus characters.
8. The thin walled tube width control system of claim 7, wherein: the distance measuring sensor is a laser distance measuring sensor.
9. The thin walled tube width control system of claim 8, wherein: the probe of the ranging sensor faces the axis of the wind disk.
10. The thin walled tube width control system of claim 9, wherein: the controller is a PLC controller.
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| CN201910576655.6A CN110281515B (en) | 2019-06-28 | 2019-06-28 | Thin-walled tube width control system |
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| CN201910576655.6A CN110281515B (en) | 2019-06-28 | 2019-06-28 | Thin-walled tube width control system |
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Citations (4)
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| JPH0272930A (en) * | 1988-09-07 | 1990-03-13 | Dainippon Printing Co Ltd | Manufacturing system for synthetic resin vessel |
| CN1065037A (en) * | 1991-03-21 | 1992-10-07 | 明尼苏达州采矿制造公司 | Make the equipment and the method for long band |
| CN2371024Y (en) * | 1999-05-10 | 2000-03-29 | 马镇鑫 | Internal cooling controller for plastic tubular film blowing machine |
| CN101337429A (en) * | 2008-08-06 | 2009-01-07 | 大连橡胶塑料机械股份有限公司 | High-precision inner-cooling automatic control system |
-
2019
- 2019-06-28 CN CN201910576655.6A patent/CN110281515B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0272930A (en) * | 1988-09-07 | 1990-03-13 | Dainippon Printing Co Ltd | Manufacturing system for synthetic resin vessel |
| CN1065037A (en) * | 1991-03-21 | 1992-10-07 | 明尼苏达州采矿制造公司 | Make the equipment and the method for long band |
| CN2371024Y (en) * | 1999-05-10 | 2000-03-29 | 马镇鑫 | Internal cooling controller for plastic tubular film blowing machine |
| CN101337429A (en) * | 2008-08-06 | 2009-01-07 | 大连橡胶塑料机械股份有限公司 | High-precision inner-cooling automatic control system |
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