KR20040073143A - Apparatus of preparing polyurethane rubber band - Google Patents

Abstract

PURPOSE: A device for manufacturing a polyurethane rubber band is provided to improve the tensile strength and heat-resistance of the rubber band by stretching polyurethane film sheet at a high temperature. CONSTITUTION: A device for manufacturing a polyurethane rubber band is composed of a stretching/separating unit(A) for stretching and separating polyurethane film sheet, a coating/drying unit(B) for coating and drying the polyurethane film sheet, a band forming unit(C) for cutting the polyurethane film sheet into rubber bands, and a distributing/packing unit(D) for distributing and packing the rubber bands.

Description

Apparatus for manufacturing polyurethane rubber band {APPARATUS OF PREPARING POLYURETHANE RUBBER BAND}

The present invention relates to a device for manufacturing a polyurethane rubber band with a polyurethane film sheet manufactured by the infrasion method using a thermoplastic polyurethane resin. More specifically, the polyurethane film sheet is stretched at the same time as heat treatment and is a support film. 1st stage device to separate the film, 2nd stage device to coat and heat-dry the release agent on both sides of the stretched polyurethane film sheet, and cut the doped polyurethane film sheet into tens of strands along the width direction to form a band. And a three-stage device for attaching starch or talc powder to both sides of the band and heat treatment again, a four-stage device for distributing and distributing dozens of rubber bands to fill the packaging evenly, and a five-stage device for aging and stabilization in a heat aging room. It relates to a series of polyurethane rubber band manufacturing apparatus.

Conventional polyurethane rubber band manufacturing apparatus has a series of devices having an extrusion device for extruding into multiple strands in the band standard using a thermoplastic polyurethane resin and a maturation chamber for heat aging and stabilizing it, another polyurethane rubber The band manufacturing device is a series of devices consisting of a heat-mature chamber which obtains a film sheet by inflation method of thermoplastic polyurethane resin, and cuts the film sheet directly to form a band and stretches it to heat aging. The latter can be said to be a device mainly carried out in the United States, and until now, all of the polyurethane rubber bands manufactured by the above devices have been imported from Japan and the United States.

Such products generally have stickiness on the band itself, so in severe cases, they do not stick well together and deteriorate workability when used in clothing.The bands made in Japan have weak tensile strength and resilience and are not good in heat resistance. Problems such as cutting.

The present invention has an object to provide a polyurethane rubber band manufacturing apparatus designed to solve the problems of the thermoplastic polyurethane rubber band currently used, and in particular, because the polyurethane film sheet is stretched at a high temperature state, the tensile strength and heat resistance are greatly increased. In order to remove the tackiness that appears on the device and the polyurethane rubber band, which are configured to improve, it is primarily coated with a release agent on the surface of the polyurethane film sheet to thermally stabilize the drying and talc powder on the second molded rubber band. It is an object of the present invention to provide a device capable of completely removing adhesiveness by impregnating heat treatment of starch powder and improving polyurethane resilience by sufficient heat treatment to produce a polyurethane rubber band having excellent physical properties.

Figure 1 is a side view of the entire device used in the polyurethane rubber band manufacturing method

2 is a heat treatment stretching and support film separation device of the polyurethane film sheet

Side view

Figure 3 is a side view of the release agent coating and drying device of the polyurethane film sheet

Figure 4 is starch in the band molding and band by cutting the polyurethane film sheet

Attachment and drying device side view

5 is a front view of the band forming apparatus according to the fragment of FIG.

6 is a distribution guide and packaging device of each polyurethane band rubber

The present invention will be described in detail with the manufacturing method as a polyurethane rubber band manufacturing apparatus, as described in detail by the engaging take-out roller (A2, A2 ') attached to the tachometer (A2 ") as shown in FIG. The laminated film F is taken out from one film feed roller A1, and the heat roller supplied from the heat source A5 'via the guide rollers A3 and A4 is brought into contact with the loaded hot plate A5 to guide the roller A6. The film F is stretched in (A12) and (A13) to which the film tow roller (A11) and the tachometer (A12 ') are attached via) to (A10), and the stretched film (F) is a guide roller (A14). Laminated film (F) is separated from the separation roller (A15) through the first step, the lower poly ethylene film (F2) is wound on the winding roller (A16) and the polyurethane film (F1) is configured to be transferred to the next step Device,

As shown in Fig. 3, the polyurethane film F1 conveyed from the first-stage apparatus is guided to the guide rollers B1 to B7, and passes through the engagement take-out rollers B8 and B8 'back to the guide roller B9. And a release agent is attached to the front surface of the polyurethane film (F1) by a release agent-attached roller (B12) and a roller (B12 ') engaged with the release agent-attached roller (B12) for supplying and attaching the release agent from the release agent barrel (B11) via the diesel release agent (B11). The release agent dries in the drying chamber B23 and is moved by the conveyor belt B22, which is moved by the roller groups B16 to B21 via B13) to B15, and a pressure roller B24 on the conveyor belt. ) And (B25) to leave the conveyor again by the guide roller (B26), (B27) via a release agent additive roller (B29) and the roller (B29 ') to be engaged with the release agent by impregnating the release agent from the release agent barrel (B28). Release agent is attached on the back of polyurethane film (F1) Within the roller (B30) 2-step device configured to sikilsu dried in a drying chamber (B31) via,

As shown in FIG. 4, the polyurethane film sheet F1 sent out from the second stage apparatus is moved together with the conveyor belt C5 which is moved and rotated by the roller groups C1 to C4 to convey the conveyor belt guide roller C3. It is guided to the meshing roller (C6) to be engaged, and is cut into tens of strands by the polyurethane sheet cutting roller (C7) and the roller (C7 ') engaged with it to form a polyurethane rubber (elastomer) band (F1'). The groups of bands F1 'are heated in the guide roller C8 in the gas heating chamber C9, and then in the separator C11 for separating the interval of the band F1' contacted via the guide roller C10. The starch feeder (C14) through the guide roller (C12) via the starch feeder (C13) by dropping and attaching the starch to the front of the band (F1 '), and then through the interlocking take-out rollers (C14, C14'). Attach starch to the back of the band (F1 ') Three-stage device configured to pass through the rollers (C16) and (C17) after the heat treatment in the heating chamber (C18),

As shown in FIG. 6, each of the band packing containers disposed evenly at regular intervals on the front and rear sides, on the container support plate D5 moved by the polyurethane rubber band F1 'distribution roller D1 at a predetermined stroke distance. A four-stage device configured to be guided by the guide roller (D2) to (D4) and introduced into the engagement rollers (D3) and (D3 ') to be uniformly accumulated in the packing container (D4),

And it is a series of polyurethane rubber band manufacturing apparatus including a heat aging chamber (G) as a five-stage device for stabilizing the aging of the band (F1 ') filled in the packaging container (D4) for 48 hours in a heat chamber maintained at 60 ℃. .

In the manufacturing apparatus and manufacturing method of the above polyurethane rubber band, the symbol D4 'is a packaging container containing scrap bands generated at both edges of the polyurethane film F1, and the heat aging chamber G is a heat-consisting wall composed of heat insulating walls of all directions. Indeed, if a steam or heating wire can be used as the heat source, it is a heat aging chamber maintained at 60 ° C. at all times and is not shown in the drawings.

In addition, since the polyurethane film sheet used in the device is formed into a tubular form by concentric double extrusion of the infrasion method, the inside is a tubular layer laminated with a polyurethane film on the outside of the poly ethylene film, so it is cut to a certain width (about 30cm), it is necessary to install the PE film removal means of the paper film in the band manufacturing apparatus.

Referring to the device of each step described in accordance with the function in the one-step device,

The drawing ratio is determined by the difference between the withdrawal speed of the polyurethane film (F1) by the engagement pull-out rollers (A2) and (A2 ') and the film withdrawal speeds of the film towing rollers (A11), (A12) and (A13). Tensile is generated when the film pulling speed is larger than the drawing speed, and the tachometers (A2 ') and (A12 ") are attached to measure the speed, and the boiling point supplied from the heat source (A5') is 150 ° C or higher. The thermal oil is filled in a hot plate to always maintain a temperature of 110 to 130 ° C.

Features of the two-stage device is a roller for attaching a release agent and a drying chamber for drying it on the front of the polyurethane film (F1), and a release agent attachment roller for coating the release agent on the back of the film and a drying chamber for drying it. In order to prevent the formation and curling of the stretched film in the previous stage device is configured to convey to the conveyor belt.

The three-stage device is also equipped with a conveyor belt to prevent curling and wrinkle formation of the stretched polyurethane film (F1), and finely cuts the cutting means for cutting the width of the polyurethane film (F1) to form a band. The roller is installed, and the starch feeder is installed as a second means of removing the adhesiveness to the band.

In the four-stage device or the five-stage device, there is nothing particularly unusual except for the above description.

The device according to the present invention can greatly improve the tensile strength and heat resistance of the polyurethane rubber band and can freely adjust the elongation ratio within the effective physical properties range, and almost completely eliminate the adhesion appearing in the thermoplastic polyurethane sheet film or band. It can be said to improve the workability in the field using this, and can be said to be a device for producing a polyurethane rubber band excellent in the original resilience by a long heat treatment.

Claims (1)

Polyurethane film sheet feed roller (A1), mesh take-out roller (A2), Polyurethane film sheet (F) is drawn out by (A2 ") and is configured to pass through when it comes in contact with the hot plate (A5), and is pulled to the film sheet towing rollers (A11), (A12) and (A13) via a plurality of guide rollers. While the heat drawing is carried out between the engaging take-out roller and the traction roller and the stretched film sheet (F) is separated from the PE film (F2) to the winding roller (A16) in the separation roller (A15) and the stretched film sheet (F1) The first stage device and the polyurethane film sheet F1 transferred from the first stage device, which are configured to be transferred to the next device, pass through the engagement rollers B8 and B8 'via a plurality of guide rollers. The release agent is attached to the front surface of the polyurethane film F1 by the release agent adhesion roller B12 and the engagement roller B12 'that are supplied and adhered from B11), and are routed by roller groups B16 to B21 via several guide rollers. Conveyed by conveyor belt (B22) Air release chamber (B23) through the pressure roller (B24) and (B25) through the guide rollers (B26), (B27) through the release agent-attached roller (B29) bonded to the diesel release cylinder (B28) and the roller (B29) engaged with it A two-stage device configured to attach a release agent to the rear surface of the polyurethane film (F1) by means of '), pass through the guide roller (B30), and pass through the drying chamber (B31) to the next device, The film F1 transferred from the previous stage device is brought into contact with the conveyor belt C5, which is moved and rotated by the roller groups C1 to C4, and is conveyed together to the pressure roller C6 to guide the polyurethane sheet cutting roller C7. The band is cut into tens of strands by the engagement roller (C7 ') to form the polyurethane rubber band (F1'), and the bands of the band (F1 ') are bands received through the heating roller (C9) via the guide roller (C8). It is to be attached to the front of the band (F1 ') by the moving starch feeder (C13) while widening the gap by separating the separation (C11) of separating the interval of (F1') and re-engagement roller (C14), ( C14 ') a three-stage device designed to pass the gasoline starch feeder (C15) through the gasoline heating chamber (C18) through the guide roller in a state where the starch is attached to the back of the pass band (F1'), Dozens of bands F1 'are uniformly spaced in front, back, left, and right on a container support plate D5 which is moved at a predetermined distance by the distribution roller D1 of the polyurethane rubber band F1' transferred from the three-stage device. A four-stage device designed to be guided to each guide roller (D2) arranged in each of the arranged packaging container (D4) and introduced into each engagement roller (D3), (D3 '), and the packaging container as a heat treatment A series of continuous polyurethane rubber band manufacturing apparatus including a five-step heat aging chamber (G) to stabilize the aging.