RU2008361C1 - Device for drying and tensioning flat sheet semifinished products - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: device has a drying chamber with a cover with means for vertical movement and a base with a working table for laying the semifinished product. The drying chamber also has a tightening seal, a branch pipe for removing wet steam, a heat-transfer agent feed device, and a semifinished product plane tension mechanism with a drive and clamps. This mechanism has two symmetrical identical parts located one above the other and fastened to the cover and the base respectively for engagement with each other. Each part has a plate with tension links hinged to its edges and inclined to it. The tension links carry clamping jaws on their free ends, the jaws are mounted for reciprocating perpendicularly to the cover movement. A vertically movable stop is mounted between the links for locking in a specified position. The clamping jaws are interconnected by springs, tension members and a central fastening member. The working table is fastened to the central fastening member of the base. EFFECT: improved structure. 2 cl, 3 dwg

Description

 The invention relates to light industry and can be used, in particular, in tanneries for drying with stretching flat semi-finished products from natural and artificial leather.

 Known devices for drying with stretching flat semi-finished leather products, made in the form of a frame with clamps mounted on the edges for gripping the edges of the semi-finished product and its subsequent stretching [1-4]. In these devices, the semi-finished product is laid on the frame, fixed with a clamp, and the clamps automatically approach the edges of the semi-finished product and clamp them, after which the semi-finished product is stretched, and then the frame with the extended semi-finished product is placed in the dryer.

 The disadvantages of the devices are their complexity and high cost, in addition, part of the clamps are set manually.

 Stretching devices are also known in which the edges of the semifinished product are gripped by clamps-tongs manually, then these clamps are manually mounted on stretching means of stretching machines and stretched the semifinished product. The principle of manual installation of clamps is widely used by well-known foreign companies, for example, the Italian "FORNI VARESE", the French "CREMCO" in the machines "PREX-O-CLIP", "CADROMAT", etc.

 The closest in technical essence to the proposed, and therefore the prototype, is the machine "CADROMAT" [5].

 The machine contains a fixed part, on which a tension table is placed, a mechanism for providing the stretching planes of semi-finished products with a drive and clamps. The mechanism is made in the form of perforated sectors, one end of which is pivotally mounted on the drive - a ball electric screw, and the other is movably fixed on the table frame. In addition, the machine contains a movable part - a cover, means for carrying the cover, a nozzle for removing wet vapor, a coolant in the form of an infrared emitter and a fan, and a control panel.

 The semi-finished product is clamped at the edges with clamps, which are then fixed to the holes made in the sectors. Then, the ends of the sectors pivotally mounted on it are raised with a ball screw. In this case, the sectors from an inclined position turn into horizontal, and the semi-finished product fixed on them stretches. Then, a lid is installed on top, the working space of the drying chamber is sealed, infrared emitters, a fan are turned on, and the stretched semi-finished product is dried.

 The advantage of the machine is its comparative simplicity. Disadvantages - manual installation and removal of clamps. Since the fixing of the semi-finished product is carried out with the inclined position of the perforated sectors, the semi-finished product sags, which creates inconvenience in work. These shortcomings reduce productivity and worsen working conditions.

 The aim of the invention is to increase processing productivity by eliminating the manual fastening and detachment of semi-finished products and improving working conditions.

 This goal is achieved by the fact that in the device for drying and stretching flat semi-finished products containing a drying chamber with a lid and its means of transportation, a base with a working table for laying semi-finished products, a seal to seal the working space of the drying chamber, a pipe for removing wet vapor, a coolant, a mechanism with a drive and clamps to ensure the planar stretching of semi-finished products, the specified mechanism is formed by two opposite parts located arranged with the possibility of mutual actions on the cover and the base, respectively, and having a plate with pivotally attached stretching rods with pivotally mounted clamping jaws pivotally mounted on their ends, mounted with the possibility of reciprocating movement perpendicular to the movement of the lid, while the ends of the rods with jaws are supported against the stop, mounted with the ability to move and fix, and pulled in the direction of stretching by springs and tension elements connecting them with the Central fastening element, at a fixed hour whose desktop is fixed. In addition, the lid body and the base are made with the possibility of closing and sealing the working space of the drying chamber at the final position of the stretching mechanism, and one vehicle is installed to move the lid and actuate the stretching mechanism. The coolant is mounted on a movable stop.

 Significant differences of the proposed technical solution from the prototype is that the mechanism for ensuring the stretching is formed by two opposite parts located, installed with the possibility of interaction respectively on the lid and base and having a plate with pivotally mounted on its edges, inclined spreader rods with pivotally mounted on their ends with clamping jaws mounted with the possibility of reciprocating movement perpendicular to the movement of the lid, while s rods with sponges are simply supported on the abutment, mounted for displacement and fixation, and pulled in the direction of stretching and tension springs elements, connecting them with the central fixing element on the fixed part which is fixed desktop. In addition, the lid body and the base are made with the possibility of closing and sealing the working space of the drying chamber at the final position of the stretching mechanism, and one vehicle is installed to move the lid and actuate the stretching mechanism. The coolant is mounted on a movable stop.

 In FIG. 1 shows a side section of the device in its initial position; in FIG. 2 - the same in drying mode; in FIG. 3 - the same in the final position with the lid raised.

 The device comprises a drying chamber having a fixed part — a base 1 and a movable part — a cover 2 mounted on a movable cross member 3 and connected to a displacement drive, for example, hydraulic cylinders 4, as well as a nozzle 5 for removing wet vapor, a seal profile 6 placed around the perimeter covers.

 The device has a mechanism for ensuring the planar stretching of semi-finished products, which consists of two identical parts located opposite each other - respectively, on the lid and base and installed with the possibility of interaction. Each part consists of a plate 7, on the edges of which are inclined to it at an angle at the hinges 8 are fixed rods 9 stretch. At the opposite ends of the rods, jaws 11 are mounted on hinges 10. The jaws of the fixed plate are located opposite the jaws of the movable plate, forming clamps. The ends of the rods with jaws are supported on an abutment 12, which is mounted for movement with a small drive 13 and secured, for example, by means of a notch 14 on the rods, and are pulled together by forces T in the direction of tension by springs 15 and tension elements, for example, screws 16 and nuts 17, connecting them with the central fastening element - the ring 18, on the fixed part of which the working table 19 is fixed. With the vertical interaction of the movable and fixed parts, the forces T provide clamping of the semi-finished product by forces N = T˙ctgα. Tensile force S = N˙ f, where f is the coefficient of friction.

 On the stops 12, a coolant, for example infrared emitters, is installed. The dimensions of the lid and base are aligned with the dimensions of the stretching mechanism.

 In the initial open position (Fig. 1), the clamping jaws protrude above the plane of the base and cover. In the final and open position (Fig. 3), the clamping jaws are flush with the plane of the base and cover. This makes it possible to close the lid with the plane of the base and seal the working space of the drying chamber.

 The device can be made in versions for linear stretching, for stretching in two mutually perpendicular directions, or for all-round plane stretching, when the jaws and rods are located in all directions.

 In addition to these coolants installed on the stops, the device allows drying by others, such as hot dry air, feeding it into the chamber, or by heating the table 19, etc.

 The device operates as follows.

 In the initial position, the lid is raised, the parts occupy the position shown in FIG. 1. In this position, the semi-finished product 20 is laid on the table and lower jaws, straighten it. Lower the lid with the top of the stretching mechanism. When touching the upper jaws of the semi-finished product, the upper and lower parts of the mechanism come into interaction. In this case, the vertical force acting on the upper part is decomposed proportionally to the number of rods in the hinges 8 and 10 on the co-members N and S with the resulting F. As the vertical force increases, the normal forces of the normal forces also increase and clamp the semi-finished product. When the force S reaches the magnitude of the force of the screed T, then from that moment stretching of the springs 15 and the semi-finished product begins. The ends of the rods with jaws begin to diverge, and the emphasis 12 slides along the rods and at the end of the extension is fixed by notches 14, while the jaws are flush with the plane of the lid and base, and the sealing profile 6 seals the working space of the drying chamber. The heat emitters mounted on the stops are turned on and the drying process is carried out by removing wet vapors through the pipe 5 (Fig. 2).

After drying the semi-finished product, turn off the heat emitters and raise the lid, opening the semi-finished product (Fig. 3),
After removing the dried semi-finished product 20, the actuators 13 return the stops 12 to their original position, while the rods 9 and the associated parts of the device occupy the initial position shown in FIG. 1.

 Compared with the base object, the proposed device provides laying the semi-finished product on a flat surface of the table 19, eliminates the manual installation and removal of clamps, providing automation of fixing and detaching the semi-finished products. All this provides improved working conditions and increased processing productivity. (56) 1. French Patent N 2542759, cl. C 14 B 1/88, 1982.

 2. French Patent N 2563235, cl. C 14 B 17/08, 1982.

 3. Patent EP N 0119944, cl. C 14 B 1/26, 1984.

 4. US patent N 4335594, CL. C 14 B 1/26, 1981.

 5. A device for drying and stretching leathers. - Catalog of the company Cadromat (France), 1988.

Claims (2)

 1. Device for drying and stretching flat sheet semi-finished products, containing a drying chamber with a lid having a means of moving it in a vertical plane, and a base with a working table for laying the semi-finished product, a seal for sealing the drying chamber, a nozzle for removing wet vapor, means for supplying coolant and a mechanism for providing a planar stretching of a semi-finished product with a drive and clamps, characterized in that, in order to increase productivity and improve working conditions, a mechanism for ensuring The semi-finished osseous stretch marks contain two symmetrical identical parts, located one above the other and mounted respectively on the lid and base with the possibility of interaction between them, each part having a plate with stretch rods pivotally mounted on its edges, mounted obliquely to it and bearing on its the free ends of the clamping jaws mounted with the possibility of reciprocating movement perpendicular to the movement of the lid, and the stop installed between the tie rods with the possibility of moving in a vertical plane and fixing it in a predetermined position, the clamping jaws being interconnected by means of springs, tensioning elements and a central fastening element, a working table is fixed on the central fastening element of the base, while the lid and base are installed with the possibility of closing and sealing the working space drying chamber at the final position of the mechanism to ensure the plane stretching of the semi-finished product, and the means of movement of the lid and the drive mechanism to ensure the semi-finished stretch marks are made in the form of power cylinders.  2. The device according to p. 1, characterized in that the means for supplying the coolant is placed on the stop.

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