RU2411888C1 - Device for hygrothermal fixation of shoe top stocks with controlled parametres of working medium - Google Patents

Abstract

FIELD: personal use articles.

SUBSTANCE: invention relates to shoe industry. Device for hygrothermal fixation of shoe top stocks, comprising vacuum chambers installed one over the other with holes for supply working agent, loading compartment arranged in the form of reservoir with closing door, steam generator in the form of hollow toroid, vacuumised reservoir, connected to vacuum pump and control system, partition between lower chamber and loading compartment, arranged as fixed perforated, upper chamber, having flat vault, without heaters, and used as accumulator of air removed by vacuum pump from lower chamber and vacuumised reservoir. To control parametres of working medium - steam - sensors of t°C - temperature and p - pressure are used, connected to computer, conversion unit and electromagnet control slide, providing, when required, for water supply into steam generator. Invention objective: improvement of device for hygrothermal fixation of shoe top stocks by means of working medium control parametres.

EFFECT: invention makes it possible to reduce quantity of equipment units, and also to perform whole cycle of hygrothermal treatment of shoe top stocks at one machine by control of working medium parametres.

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Description

The invention relates to the shoe industry. Object of the invention: improving the installation for hygrothermal fixation of the workpieces of the upper shoe by adjusting the parameters of the working environment.

A device for wetting shoe blanks in a vacuum is known (USSR author's certificate No. 1715294 class A43D 11/14. A device for vacuum moistening shoe blanks L.V. Larina and others. Shakhty Technological Institute of Consumer Services), which contains vacuum chambers installed one on another one. The loading compartment is made in the form of a container with a hermetically closing door and is located between the vacuum chambers. The loading compartment is connected with its ends to the loading ends of the cameras. A lid made in the form of a piston is freely installed inside the compartment, which can move along the vertical axis, overlapping the loading ends of the chambers. Vacuum chambers are connected to a vacuum pump and have openings for supplying a working agent.

The disadvantage of this device is that it is designed to perform one operation "humidification".

A device for hygrothermal fixation of workpieces of upper shoes (RF patent No. 2312573 class. A43D 11/14. Device for hygrothermal fixation of workpieces of shoes L.V. Larina and other South Russian State University of Economics and Service).

A device for hygrothermal fixation of shoe upper blanks, containing vacuum chambers installed one above the other with openings for supplying a working agent, a loading compartment made in the form of a container with a closing door, a steam generator in the form of a hollow torus, a vacuum tank connected to a vacuum pump and control system, characterized in that the partition between the lower chamber and the loading compartment is fixed perforated, and the upper chamber having a flat arch is made without heaters and It is used as a battery of air removed by a vacuum pump from the lower chamber and the evacuated tank.

The disadvantage of this device is that it does not provide for automatic control of the parameters of the working environment, which have different values of t ° C and p depending on the type of hygrothermal operation performed during the operation of the installation.

The proposed device comprises a loading compartment 1 with a hermetically sealed cover 24, a sealed chamber 17, separated from the loading compartment 1 by a rigidly fixed perforated partition 20, through which the rod 13 freely passes with a spring 19 mounted on it and connected to a piston 14 located inside the cylinder 16, installed in a sealed chamber 17, a perforated block 21 with a workpiece 22, worn on the rod 13 and covered with an airtight film 23 from above, the edges of which are fixed on the base of the loading compartment 1, 15 with water and electric heaters 12 built into it, a vacuum pump 6, a vacuum tank 2, an air accumulator 7 and a control system 4. The control system 4 includes a shut-off valve 10 of the sealed chamber 17 from the vacuum pump 6, an air inlet valve 18 into the sealed chamber chamber 17, valve 11 to shut off the sealed chamber 17 from the vacuum tank 2, valve 8 to cut off the vacuum tank 2 from the vacuum pump 6, valve 5, which distributes the evacuated air by the vacuum pump 6, into the loading compartment 1, and into the air accumulator 7, the shutoff valve 3 is accumulated air 7 from cylinder 16, from the loading compartment 1, the shutoff valve 9 of the air accumulator 7 from cylinder 16.

In the initial position, the loading compartment 1 is closed by a cover 24, in a sealed chamber 17 on a fixed perforated partition 20, a perforated block 21 with a blank 22, covered by an airtight film 23, covered by an airtight film 23. is installed on the rod 13. Electric heaters 12 located in the tank 15 with water are included. The vacuum pump 6 is connected through valve 8 to a vacuum tank 2, and through valve 5 to an air accumulator 7. The sealed chamber 17 is cut off through valve 10 from the vacuum pump 6 and valve 11 from the vacuum tank 2, valve 9 cuts off cylinder 16 from the air accumulator 7 The air inlet valve 18 into the sealed chamber 17 is closed.

An automatic control unit, consisting of temperature sensors - t ° C - 25 and pressure - p - 26, located in the lower chamber 17, connected through a computer and a conversion unit with an electromagnetic control spool 27, which supplies water as necessary.

The device operates as follows: by opening the cover 24, fix the perforated block 21, with the workpiece 22 on the rod 13, and cover with an airtight film 23. The edges of the film are fixed on the base of the loading compartment 1, include electric heaters 12 in the water tank 15 in the sealed chamber 17. After this tightly closes the cover 24. The valve 8 cuts off the vacuum tank 2 from the vacuum pump 6, the valve 10 connects the sealed chamber 17 with the vacuum pump 6, the valve 11 with the vacuum tank 2. Upon reaching the degree of vacuum in the sealed Amer 17 equal to 0.02 MPa and temperature of heating water in the tank 15 to 60 ° C, begins to form wet steam which is within 2 minutes hydration produces workpiece 22 on the perforated strip 21 from the inside. The vacuum pump 6, creating a vacuum in the sealed chamber 17 through the valve 5, directs the pumped air into the cylinder 16, thereby lifting the block 21 with the workpiece 22, put on the rod 13, in this case, the valve 5 is activated simultaneously with the valve 9, through which the air accumulator increases the pressure in the cylinder 16, then, fixing the pressure in the cylinder 16, the valve 9 cuts off the air accumulator 7 from the cylinder 16, and the valve 5 simultaneously with the valve 3 directs air from the air accumulator 7 and from the vacuum pump 6 to the loading compartment 1. Created Deflection in the loading compartment 1 helps to fix the airtight film 23 on the workpiece 22. Under pressure in the cylinder 16, the rod 13 with the perforated block rises up, thereby ensuring maximum fit of the workpiece 22 on the perforated block 21. The vacuum pump 6 is cyclical (2-3 times) it is disconnected by valve 10 from the sealed chamber 17 and connected by valve 8 to the evacuated container 3, creating a reduced pressure in it, and then after 1-2 minutes it again vacuumizes the sealed chamber 17, drying from the inside with steam, p regretym in container 15 with increasing pressure in the sealed chamber 17. At the end of the cycle via a valve 18 let in air in a sealed chamber 17, the workpiece is cooled, after which it is removed through a door 24 from the loading compartment 1.

To control the parameters of the working medium - steam, temperature sensors - t ° C - 25 and pressure sensors - p - 26 are used, which are connected to a computer, where their readings are compared with the given dependence p = f (t) for the state of saturated steam at a pressure below atmospheric. In the case of a mismatch of these indicators, the signal is fed to the electromagnetic control valve 27, through which a portion of water is supplied until the matching between the indicators t ° C and p when wet. During drying, the temperature rise is ahead of the pressure rise and a portion of water is not required, therefore, the set temperature level of the resulting dry steam is maintained.

Claims (1)

Device for hygrothermal fixation of shoe upper blanks with adjustable parameters of the working medium, containing vacuum chambers installed one above the other with openings for supplying the working agent, a loading compartment made in the form of a container with a closing door, a steam generator in the form of a hollow torus, a vacuum tank connected to a vacuum pump and control system, a partition between the lower chamber and the loading compartment, made fixed perforated, the upper chamber having a flat arch, without heating oil and used as a battery of air removed by the vacuum pump from the lower chamber and the evacuated container, characterized in that for controlling the parameters of the working medium - steam, t ° C - temperature and p - pressure sensors are used associated with the computer, conversion unit and electromagnetic control spool providing water supply to the steam generator as necessary.