RU2537160C1 - Shoe upper moulding device - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to shoe upper moulding device. The device comprises vacuum chambers arranged one above the other and having the working agent feed openings, a loading compartment composed of a vessel with a closing door, a hollow torus-shape steam generator, an evacuated vessel communicated with a vacuum pump and a control system. A fixed perforated partition is arranged between the bottom chamber and the loading compartment. The top chamber has a flat vault without a heater used as an accumulator of air forced by the vacuum pump from the bottom chamber and the evacuated vessel. Note here that, for an increase in moulding force, an extra P-pressure transducer is used connected to a computer, a conversion unit and a control solenoid to allow the compressed air feed from the air accumulator into the cylinder piston end when required.

EFFECT: provision of the controlled moulding force.

1 dwg

Description

The invention relates to the shoe industry. Object of the invention: improving the installation for forming blanks of shoe upper by regulating the molding force.

A device is known for hygrothermal fixation of workpieces of shoe upper (RF Patent No. 2312573 class. A43D 11/14 2007. 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 an accumulator of air removed by a vacuum pump from the lower chamber and the evacuated container.

The disadvantage of this device is that it does not provide for automatic control of the molding force.

A device is known for hygrothermal fixation of workpiece upper with adjustable parameters of the working environment (RF Patent No. 2411888 class A43D 11/00 2011. Device for hygrothermal fixation of workpiece upper with adjustable parameters of the working medium 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, a partition between the lower chamber and the loading compartment, made fixed perforated, the upper chamber having a flat arch, without heaters and used as an air battery and being removed from the bottom of the vacuum pump chamber and the container evacuated. To control the parameters of the working medium - steam, t ° C - temperature and p - pressure sensors are used, connected to a computer, a conversion unit and an electromagnetic control spool, providing water supply to the steam generator as necessary.

The disadvantage of this device is that it provides only automatic control of the parameters of the working environment, and the molding force is not adjustable.

The problem is solved as follows. A device for forming 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, a partition between the lower chamber and the loading compartment, made fixed perforated, the upper chamber having a flat vault, without heaters and used as a battery of air removed in by a booster pump from the lower chamber and the evacuated container, characterized in that an additional P-pressure sensor is used to control the molding force, connected to a computer, a conversion unit and an electromagnetic control spool, providing, as necessary, air supply from the air accumulator to the cylinder piston cavity as necessary .

The drawing shows the proposed device.

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 to the loading compartment 1 and into the air accumulator 7, valve 3 and air 7 from the cylinder 16, from the loading compartment 1, the shutoff valve 9 of the air accumulator 7 from the cylinder 16.

In the initial position, the loading compartment 1 is closed by a lid 24, in a sealed chamber 17 on a fixed perforated partition 20, a perforated block 21 with a workpiece 22, covered by an airtight film 23, is mounted on the rod 13. Electric heaters 12 located in the tank 15 with water are included. The vacuum pump 6 is connected through a valve 8 to a vacuum tank 2, and through a valve 5 to an air accumulator 7. The sealed chamber 17 is cut off through a valve 10 from a vacuum pump 6, and a valve 11 from a vacuum tank 2, an electromagnetic control valve 9 cuts off cylinder 16 from 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 valve 27, which supplies water as necessary.

The automatic control of the molding force uses a pressure sensor 28 connected to the computer and the conversion unit with an electromagnetic control valve 9, which, as necessary, provides air under pressure from the air accumulator to the piston cavity of the cylinder 16.

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 it 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 that, it is hermetically sealed close 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 least 17, at 0.02 MPa, and temperature of heating water in the tank 15 to 60 ° C begins to form wet steam which produces within 2 minutes hydration workpiece 22 on the perforated strip 21 from the inside. The vacuum pump 6, creating a vacuum in the sealed chamber 17, directs the evacuated air through the valve 5 to the cylinder 16, thereby raising 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 electromagnetic control spool 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 loading compartment 1. The created pressure in the loading compartment 1 fixes the airtight film 23 on the workpiece 22. Under pressure from the cylinder 16, the rod 13 with the perforated deck rises, thereby ensuring maximum fit of the workpiece 22 on the perforated block 21. The vacuum pump 6 is cyclically ( 2-3 times) is disconnected by the valve 10 from the sealed chamber 17 and connected by the valve 8 to the evacuated vessel 3, creating a reduced pressure in it, and then after 1-2 minutes the vacuum tight chamber is again evacuated 17, making inside the drying steam superheated in the 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 case of a mismatch of these indicators, the signal enters the electromagnetic control spool 27, through which a portion of water is supplied until the matching between the indicators t ° C and p when moistened. During drying, the temperature increase is ahead of the pressure increase and a portion of water is not required, therefore, the set temperature level of the resulting dry steam is maintained.

To regulate the molding force, a pressure sensor 28 is used, connected to a computer and a conversion unit with an electromagnetic control valve 9, which, as necessary, provides air under pressure from the air accumulator to the piston cavity of the cylinder 16.

Claims (1)

A device for forming 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, a partition between the lower chamber and the loading compartment, made fixed perforated, the upper chamber having a flat vault, without heaters and used as a battery of air removed in by a booster pump from the lower chamber and the evacuated container, characterized in that an additional P-pressure sensor is used to control the molding force, connected to a computer, a conversion unit and an electromagnetic control spool, providing, as necessary, air supply from the air accumulator to the cylinder piston cavity as necessary .