KR101363750B1 - Appartus for manufacturing a flat sheet - Google Patents

Abstract

The present invention relates to a sheet manufacturing apparatus including a melting part for heating a raw material to impart fluidity, and a molding part for molding a molten raw material into a sheet, wherein the molding part includes at least two cold forming rollers, A first forming roller having a receiving portion with a partially indented surface and a narrow neck, and a second forming roller having a smooth cylindrical surface, wherein the first forming roller and the second forming roller are rotated. While the molten raw material is passed between the first molding roller and the second molding roller to provide a sheet-like sheet manufacturing apparatus, characterized in that the sheet-like sheet having a protruding structure on the surface.

Description

Plate-like sheet manufacturing apparatus {APPARTUS FOR MANUFACTURING A FLAT SHEET}

The present invention relates to a sheet-like sheet manufacturing apparatus, and in particular, to continuously produce a plate-like sheet having a variety of projections or indentations, and proposes a new device that is easy to separate the sheet from the forming roller after molding.

Waterproofing works are carried out to prevent leakage in tunnels, roofs of buildings, underground parking lots, etc., and sheet waterproofing works are widely adopted to spread and install waterproof sheets of a certain size on the floor for construction convenience.

There are various types of waterproof sheets depending on the main materials, but waterproof sheets made of synthetic polymer plastic materials such as EVA, HDPE, polyurethane, and PVC are widely used. Synthetic polymer waterproof sheet is usually used for waterproofing sheet because of its high elongation, which has good followability and conformity to cracks or behavior of building matrix and sufficient durability such as weather resistance and heat resistance.

The waterproof sheet is made of a sheet-like rolled sheet having a standardized width and length. 1 illustrates an example of a sheet manufacturing apparatus for continuously mass-producing a sheet-like sheet.

The illustrated apparatus mainly produces a sheet or film of a flat plate, and is produced by processing a sheet formed with a surface pattern such as a projection according to the shape of the forming roller by an extrusion method, the melter 110, the forming unit 120, It is composed of a winding unit (130).

Looking at the sheet manufacturing process, first, the raw material to be applied to the molding in the melter 110 is injected into the hopper 114, the raw material is mainly a resin (112) in the form of a pellet (pellet) is applied. The raw material injected into the hopper is heated in a plurality of cylinders 116, and fluidity is imparted by applying heat to the solidified pellets. The temperature applied to the raw material in the cylinder is set in a temperature range higher than 20 to 30 ° C. above the melting point of the raw material.

The resin raw material provided with the fluidity is extruded into a plate through a T-die 118, and the extruded plate-like sheet 122 passes through the forming roller 125 of the forming unit 120 and has a predetermined thickness. It is finally molded into a sheet 124 having a pattern. Cooling water is circulated in each of the forming rollers 125, and a sheet is formed between the forming rollers, and a pattern is formed on the surface, or the thickness of the plate-shaped molding is determined according to the interval between forming rollers.

Finally, the plate-like sheet on which cooling and molding is completed is wound in the form of a roll 126 at the winding unit 130.

Thus, the sheet-like sheet manufacturing apparatus using the tee die and the cooling molding roller can manufacture the sheet | seat by processing the surface of a shaping | molding roller, in order to form the pattern of an uneven | corrugated form.

For example, when the indentation portion X1 is formed in the forming roller 125a as shown in FIG. 2, the plate-like sheet 122a has protrusions formed on its surface while undergoing an extrusion process. Thus, the plate-shaped sheet in which the projection of the simple form is comparatively easily separated from the forming roller.

On the other hand, as shown in FIG. 3, when the indentation portion X2 formed in the forming roller 125b includes a narrow neck N such as a nape, the plate-like sheet 122b extruded through the forming roller ) Is not separated from the forming roller even after the molding process is completed. This is because the neck N is formed in the same protrusion structure of the plate-like sheet corresponding to the indentation of the forming roller, and the protrusion on the upper end of the neck N prevents the plate-like sheet from being separated from the forming roller.

In the case where the projections or the complex surface protruding structures including the necks are formed in the sheet-like sheet as described above, the sheet-like sheet cannot be separated from the forming roller, thereby limiting continuous sheet production and causing failure and breakage of the sheet manufacturing apparatus. have.

The present invention has been made under the foregoing technical background, and an object of the present invention is to provide a sheet manufacturing apparatus for continuously mass-producing plate-shaped sheets.

Another object of the present invention is to provide a sheet manufacturing apparatus capable of increasing the production stability and manufacturing efficiency of a plate-like sheet.

It is another object of the present invention to produce plate-shaped sheets with protrusions or indentations of various forms.

Other objects and technical features of the present invention will be presented in more detail in the following detailed description.

In order to achieve the above object, the present invention provides a sheet manufacturing apparatus comprising a melting part for heating the raw material to impart fluidity, and a molding part for molding the molten raw material into a sheet, wherein the molding part includes at least two cold forming rollers The cold forming roller includes a first forming roller having a receiving portion with a partially indented surface and a narrow neck, and a second forming roller having a cylindrical structure having a smooth surface, wherein the first forming roller And the second forming roller is rotated to provide a sheet-like sheet manufacturing apparatus, characterized in that the molten raw material passes between the first forming roller and the second forming roller and is formed into a sheet having a protruding structure on the surface thereof.

The receiving portion of the first forming roller is provided with a movable guide around a narrow neck, the movable guide is elastically controlled by the elastic means.

The present invention further includes a guide extension roller disposed adjacent to the first forming roller and configured to locally expand the guide.

The first forming roller includes a cooling roller, a molding rim having a receiving portion inserted therein and coupled to an outer circumferential surface of the cooling roller, and a first guide rim and a second guide rim respectively coupled to both sides of the molding rim. can do. In this case, the forming rim, the first guide rim and the second guide rim are combined to be integrated into one structure, and the first guide rim and the second guide rim are narrower than the receiving portion at the upper portion of the receiving portion of the forming rim. Form a neck.

The first forming roller is inserted into and coupled to the outer peripheral surface of the cooling roller, and may include an auxiliary rim disposed around the forming rim and the guide rim.

According to the present invention, it is possible to mass-produce a sheet-like sheet having a protruding structure of various forms on its surface. Sheets that are continuously molded are stably separated from the forming rollers and do not cause product defects or failure of the apparatus. In particular, it is suitable for forming a narrow neck structure on the surface. The sheet manufacturing apparatus of the present invention can be applied to manufacturing various plastic molded sheets as well as waterproof sheets.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic diagram which showed the structure of the plate-shaped sheet manufacturing apparatus.
2 is a schematic view showing a forming roller having an indentation formed therein.
Figure 3 is a schematic view showing a forming roller formed indentation with a neck.
4A and 4B are schematic views showing a forming roller of the present invention.
Figure 5 is a cross-sectional view showing a sheet made of a molding roller of the present invention.
6 is a schematic view showing a forming roller with a guide extension roller disposed thereon.
Figures 7a and 7b is a photograph showing the arrangement of the guide expansion roller.
8 is a schematic cross-sectional view showing a sheet forming and separating process.
9 is a schematic view showing another embodiment of the forming roller of the present invention.
10A and 10B are perspective and side views showing the forming rim.
11 is a sectional view of a guide rim;
12A and 12B are side views showing a composite rim in which a forming rim and a guide rim are combined;
Figure 13 is a side view of the forming roller combined with the composite rim and the auxiliary rim.
Figure 14 is a cross-sectional picture of the actual waterproof sheet produced by the sheet manufacturing apparatus of the present invention.

The present invention proposes a flat sheet forming system in which a cooling and forming roller is improved in order to produce a projecting structure having a neck on a sheet surface.

The sheet manufacturing apparatus according to the present invention can implement a protruding flat sheet using two or three forming rollers. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

4A shows the first forming roller 225 of the forming portion in the sheet manufacturing apparatus of the present invention. This first forming roller is a cylindrical structure and has a cooling circulation device (not shown) for cooling the molten sheet to solidify it into a desired shape. On the surface of the first forming roller, there is a receiving portion 225a for forming a protrusion structure having a predetermined shape on the sheet, and the receiving portion is continuously formed on the cylindrical outer circumferential surface of the first forming roller. In the present embodiment, the accommodating part 225a has a circular cross section of an ellipse shape and a cross section of a lower cross section of a rectangular shape, and has a width of a lower rectangle that is narrower than that of the upper circle or ellipse structure. have.

The movable guide 230 is disposed at both sides of the lower portion of the receiving portion with the neck. The movable guide is elastically controlled by elastic means 232 such as a spring, and restricts the width of the neck structure under the receiving portion, while the width of the movable guide is expanded by the guide extension means described below to form a sheet. Easily separated from the first forming roller. The movable guide may be disposed locally or continuously along the outer circumferential surface of the first forming roller, which will be described later.

The sheet manufacturing apparatus according to the present invention includes another cold forming roller in addition to the first forming roller. Referring to FIG. 4B, the second shaping roller 226 having a smooth cylindrical surface is disposed adjacent to the first shaping roller 225, and the raw material passes between the first shaping roller and the second shaping roller. The sheet-like sheet 222 is molded by an extrusion method. The second molding roller is also equipped with a cooling circulation device (not shown) to cool the sheet to be molded.

The raw material to which fluidity is heated by melting in the melting part is filled into the receiving portion 225a of the first forming roller while passing between the rotating first forming roller and the second forming roller and formed into a plate-like sheet having a protruding structure on the surface. do. In the forming process, the sheet-like sheet is formed with a surface structure having protrusions 222a protruding to the upper surface and a narrow neck 222b below the protrusions, similarly to the shape of the receiving portion of the first molding roller, as shown in FIG. 5. do.

It is preferable that the first forming roller and the second forming roller rotate in opposite directions so that the flowable raw material is continuously formed into a sheet of sheet.

The plate-like sheet separated from the forming roller after the molding is completed may be difficult to separate from the forming roller (particularly from the first forming roller) due to the necked protruding structure. To this end, the sheet manufacturing apparatus of the present invention, as shown in Figure 6 is disposed adjacent to the first forming roller, and further comprises a guide expansion roller 250 for locally expanding the movable guide 230.

The guide extension roller 250 is inserted into the receiving portion of the first forming roller in the same or the same direction as the first forming roller or not rotated to locally expand the movable guide. As a result, the plate-shaped sheet in which the molding is completed in the first molding roller can be easily exited from the first molding roller. 7A and 7B, it can be seen that the guide extension roller (large circle) of the sheet manufacturing apparatus is locally inserted into the receiving portion (small circle) of the first forming roller. Since the movable guide is expanded only in the portion in which the guide extension roller is inserted while the first molding roller is rotated, a protruding structure having a neck is formed on the surface of the sheet at rest.

A detailed process of forming the sheet and separating the sheet by the guide extension roller will be described with reference to FIG. 8. FIG. 8 schematically shows a cross-sectional structure in which the first molding roller 225 and the sheet are molded, and the second molding roller is excluded for convenience. Identification number 222 designates the protrusion forming section of the sheet. The guide extension roller 250 is disposed above the rear side B of the first forming roller. The high temperature sheet 221 extruded from the tee die enters the lower first rotating roller and passes through the front of the first forming roller F, thereby forming the sheet on the surface of the sheet through the first forming roller receiving portion. A protruding structure is formed. When the molding is completed, the sheet is separated from the first molding roller at the first molding roller E, and the guide extension roller 250 disposed in front of the separation point of the sheet extends the movable guide in the receiving portion of the first molding roller. This facilitates separation of the sheet. According to the relative sizes of the first forming roller and the guide extension roller, the rotation direction and the rotational speed of the first forming roller, and the shape of the protruding structure formed on the sheet-like sheet, the forming section and the separating section shown in FIG. It may be a little different.

The sheet manufacturing apparatus according to the present invention may further include another cooling roller to increase the molding stability and cooling effect of the sheet. Referring to FIG. 9, it can be seen that two forming rollers 226 are disposed at positions opposite to the first forming roller 225, respectively. These rollers have a smooth cylindrical surface and each has a cooling circulation system. In the case of forming a sheet by the three forming rollers, it is suitable to continuously produce the sheet by operating the first forming roller 225 and the forming rollers 226 on both sides in different rotation directions.

In the present invention, the receiving portion of the first molding roller may be directly formed on the surface of the first molding roller, or alternatively, may be formed on a separate structure and then posteriorly coupled to the first molding roller surface.

Referring to Figures 10A and 10B, a shaped rim 260 is shown having an indented receptacle. This forming rim is inserted into the outer peripheral surface of the cooling roller with a smooth surface, and can function as a receiving portion of the first forming roller. The molded rim has a receiving portion 264 is formed on the outer circumferential surface in the form of a circular ring, there is a coupling portion 262 and the inclined surface 265 for coupling with the guide rim to be described later on both sides of the receiving portion. The forming rim may be formed by integrating structures such as a receiving portion, a joining portion, and an inclined surface into one metal, for example.

11 shows a guide rim 270 coupled with the shaping rim to serve as a movable guide. This guide rim, unlike the forming rim, has two structures, including a fixed rim 274 having an empty interior and a receiving space on the inner circumferential surface and a moving rim 272 accommodated inside the fixed rim. A plurality of elastic means 276 is disposed between the fixed rim and the movable rim so that the movable rim is elastically movable within the fixed rim.

The guide rims are coupled to both sides of the forming rim, respectively, and form a neck that is narrower than the receiving portion at the upper portion of the receiving portion of the forming rim while the inclined surface 275 of the movable rim is in contact with the inclined surface 265 of the forming rim. . In addition, the guide rim is elastically moved by the insertion of the above-mentioned guide extension roller to change the structure of the receiving portion of the first forming roller.

12A shows a composite rim 280 in which the forming rim and two guide rims are combined to serve as a receiving portion of the first forming roller. When the guide extension roller is not inserted, the moving rim 272 of the guide rim and the receiving portion 264 of the forming rim together form a receiving space with a neck, which is the accommodation described in the embodiment of FIG. 4A. Part 225a will be implemented, and the hot sheet (extruded from the tee die and moved to the first forming roller) is formed with a protruding structure on the surface.

When the guide extension roller is inserted and the moving rim is opened to both sides, as shown in FIG. 12B, the shape of the accommodation space is changed to a structure without a neck, and in this state, the protruding structure of the seat where the molding is completed is moved in the accommodation space. You can easily get out.

The composite rim 280 functioning as an accommodation portion may be coupled to and integrated with the outer circumferential surface of the cylindrical cooling roller 281 as shown in FIG. 13. In this case, in order to secure the coupling stability and coupling position of the composite rim, it may include auxiliary rims (286, 288) are inserted and coupled to the outer peripheral surface of the cooling roller and disposed around the composite rim.

Figure 14 shows a cross-sectional structure of the waterproof sheet actually produced through the plate-like sheet manufacturing apparatus according to the present invention. It can be seen that the movable guide implements a narrow neck structure at the receiving portion, so that a narrow protrusion structure is formed on the plate-like sheet surface. In addition, the neck structure formed by the movable guide was dismantled through the local insertion of the guide extension roller, so that the molded sheet could easily come out without being stuck to the receiving portion of the first forming roller.

The sheet having such a surface protruding structure can be applied to various technical fields in addition to the waterproof sheet, and it is possible to manufacture a plate-like sheet having a more complicated form of protruding structure by changing the receiving structure of the forming roller or by varying the receiving position. There will be.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modified, modified, or improved.

110: melting part 120: molding part
130: winding part 222: sheet
225: first molding roller 226: second molding roller
230: movable guide 250: guide extension roller
260: molding rim 270: guide rim
280: compound rim

Claims (10)

A sheet manufacturing apparatus comprising a melting part for heating a raw material to impart fluidity and a molding part for molding the molten raw material into a sheet,
The shaping portion includes at least two cold forming rollers, the cold forming rollers having a first portion of which the surface is partially indented and a receiving portion having a narrow neck, and a second cylindrical surface having a smooth surface. It includes a forming roller,
The receiving portion of the first forming roller is provided with a movable guide around a narrow neck,
The molten raw material passes between the first molding roller and the second molding roller while the first molding roller and the second molding roller are rotated to be formed into a plate-like sheet having a protruding structure on the surface thereof.
Plate-shaped sheet manufacturing apparatus. delete The plate-shaped sheet manufacturing apparatus according to claim 1, wherein the movable guide is elastically controlled by elastic means. The plate sheet manufacturing apparatus of claim 1, further comprising a guide extension roller disposed adjacent to the first forming roller and configured to locally expand the guide. The apparatus of claim 1, wherein the first forming roller and the second forming roller rotate in opposite directions. The plate sheet manufacturing apparatus of claim 1, further comprising a third forming roller having a cylindrical structure having a smooth surface and disposed at a position opposite to the second forming roller about the first forming roller. The plate-shaped sheet manufacturing apparatus according to claim 1, wherein the plate-shaped sheet is formed with a surface structure having a projection protruding toward an upper surface and a narrow neck under the projection. 2. The first molding roller according to claim 1, wherein the first molding roller comprises a cooling roller, a molding rim having a receiving portion inserted and coupled to an outer circumferential surface of the cooling roller, and having a surface indented thereon, and a first rim respectively coupled to both sides of the molding rim. Apparatus for producing a sheet sheet comprising a guide rim and a second guide rim. The method of claim 8, wherein the forming rim, the first guide rim and the second guide rim are coupled to each other to form a single structure, the first guide rim and the second guide rim is more than the receiving portion in the upper portion of the receiving portion of the forming rim A plate-shaped sheet manufacturing apparatus characterized by forming a narrow neck. The apparatus of claim 8, wherein the first forming roller is inserted into and coupled to an outer circumferential surface of the cooling roller, and includes an auxiliary rim disposed around the forming rim and the guide rim.

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