KR102111896B1 - Apparatus for manufacturing foam sheet - Google Patents

Abstract

According to one embodiment of the present invention, a foam sheet manufacturing apparatus comprises produces a polyethylene foam sheet by mixing a polyethylene source material, a foaming agent, and an additive. The foam sheet manufacturing apparatus comprises: a source material input unit through which the polyethylene source material is introduced; a mixing unit which includes a material input unit in which the foaming agent and the additive are transferred; a melting unit which is connected to the mixing unit, to melt the mixture mixed in the mixing unit by applying heat thereto; a cooling unit which is connected to the melting unit, to cool the mixture melted in the melting unit; an extrusion unit which is connected to the cooling unit, to extrude the cooled mixture through gaps in a ring-shaped dice; a filter unit which is disposed between the cooling unit and the extrusion unit, to evenly distribute particles of the mixture being transferred from the cooling unit to the extrusion unit; a cutting unit which cuts a cylindrical foam sheet extruded via the extrusion unit, into a flat foam sheet; a spread unit which causes the foam sheet cut by the cutting unit, to spread without folding; a winding unit on which the foam sheet spread by the spread unit is wound; and an antistatic unit which is disposed between the winding unit and the spread unit, to prevent static electricity from being generated between the foam sheet and the winding unit.

Description

Foam sheet manufacturing equipment {Apparatus for manufacturing foam sheet}

The present invention relates to a foam sheet manufacturing apparatus, and more particularly, to a foam sheet manufacturing apparatus for manufacturing a polyethylene foam sheet by mixing polyethylene raw materials, blowing agents and additives.

Polyethylene is foamed and manufactured in the form of a foam sheet to be used as a shock absorber. Polyethylene foam sheet is attached to the waterproofing layer of concrete structures such as underground concrete structures such as subways, underground roadways, electric power tools, tunnels in open and closed tunnels, or the outer walls of buildings, upper slabs in underground parking lots, and roofs of buildings. It is also used for the waterproof layer protection sheet to prevent the waterproof layer constructed by work or various external forces applied from the outside from being damaged.

Conventional polyethylene foam sheets are generally manufactured in a flat shape, and embossing foam sheets are also manufactured to improve buffering by providing embossing in the form of grooves and protrusions to form an air layer on these foam sheets.

The conventional polyethylene embossed foam sheet forms an emboss by attaching a protrusion to the surface of the foam sheet, or heats and compresses a mold provided with a groove to be formed in the foam sheet and a corresponding protrusion, and fuses the surface of the foam sheet. To form an emboss.

In the former case, since the attachment process is added, the manufacturing process is complicated, labor costs are high, and mass production cannot be achieved.

In the latter case, the embossing is formed by heating the mold to compress and fusion the surface of the foam sheet, so the manufacturing process is complicated and the quality of the foam sheet is depressed during welding. In addition, since the embossing by fusion is formed after manufacturing the flat sheet of foam, there is a problem of material loss due to the fusion site.

Accordingly, there is an urgent need to develop a polyethylene embossing foam sheet manufacturing apparatus that can be mass-produced by simple and automated manufacturing processes and can reduce costs by reducing material loss.

Korean Registered Patent No. 10-2019034

An object of the present invention is to provide an apparatus for producing a polyethylene foam sheet by mixing polyethylene raw materials, blowing agents and additives.

Foam sheet manufacturing apparatus according to an embodiment of the present invention, in a foam sheet manufacturing apparatus for producing a polyethylene foam sheet by mixing a polyethylene raw material, a blowing agent and additives, the raw material input portion and the blowing agent and additives to which the polyethylene raw material is introduced Mixing unit having a material injection unit is moved, connected to the mixing unit, by applying heat to the mixture mixed in the mixing unit, the melting unit to melt, connected to the melting unit, and the mixture melted in the melting unit Cooling unit for cooling, connected to the cooling unit, the extruding unit for extruding the cooled mixture through a ring-shaped die gap, disposed between the cooling unit and the extruding unit, and moved from the cooling unit to the extruding unit A filter unit that evens out the particles of the mixture, and cuts a cylindrical foam sheet extruded through the extruder to make a flat foam sheet The cutting portion, the spread sheet to be spread without overlapping the foam sheet cut by the cutting portion, the winding portion is wound around the foam sheet spread by the spread portion, and is disposed between the winding portion and the spread portion, It may include an antistatic portion to prevent the generation of static electricity between the foam sheet and the winding portion.

The foam sheet manufacturing apparatus according to an embodiment of the present invention is equipped with the filter unit, and allows the filter unit disposed in the communication space between the cooling unit and the extrusion unit to be taken out to the outside or the external filter unit is brought into the communication space. The filter replacement part further includes a filter replacement part, a filter insertion part and a filter insertion part sliding between the extruding part and the cooling part, sliding along the intermediate part, and forming an insertion space in which the filter part is inserted. It is connected to a portion, and has a cylinder portion that allows the filter insertion portion to slide along the mediation portion, wherein the mediation portion is a first through portion penetrated in the first direction from the cooling portion toward the extruded portion and perpendicular to the first direction It has a second through portion penetrated in one second direction, the first through portion, the mixture of the mixture from the cooling portion to the extruded portion Provided this passageway, and the second through portion, it is possible to provide a flow channel wherein the filter insertion section.

The filter inserting part of the foam sheet manufacturing apparatus according to an embodiment of the present invention includes a first space providing piece and a second space providing piece that provide a space into which the filter part is inserted, and the first space providing piece and the The second space providing piece is arranged side by side in the second direction, and when the first space providing piece is inserted into the second through portion, the second space providing piece is exposed to the outside, and the second space providing piece is provided. When the piece is inserted into the second through portion, the first space providing piece may be exposed to the outside.

The filter part of the foam sheet manufacturing apparatus according to an embodiment of the present invention, while being formed in an annular shape, is mounted to the frame part mounted in the insertion space and the frame part hollow to move the mixture from the cooling part to the extruded part It has a filtering part, the filtering part is composed of a first filter mesh piece, a second filter mesh piece and a third filter mesh piece sequentially stacked along the first direction, the first filter mesh piece, the second filter mesh piece and In the order of the third filter net piece, the size of the through hole constituting the network may be reduced.

The anti-static part of the foam sheet manufacturing apparatus according to an embodiment of the present invention includes a steam generating unit for generating water vapor and an injection unit for spraying water vapor generated from the steam generating unit to the foam sheet spread by the spread unit. , The injection unit, a plurality of injection pieces arranged radially along the direction from the spread portion toward the winding, and each of the injection pieces constituting the plurality of injection pieces, a connection portion connected to the steam generating unit and It is connected to the end of the connecting portion, it may be provided with an extension extending to the lower side of the winding.

The extended portion of the foam sheet manufacturing apparatus according to an embodiment of the present invention, the length may be changed from the end of the connecting portion.

The spread portion of the foam sheet manufacturing apparatus according to an embodiment of the present invention is disposed to be spaced apart from the first bow portion and the first bow portion disposed between the cutting portion and the winding portion, the first bow portion A second bow portion disposed between the winding portions, and the first rod portion is connected to a first standing portion standing on the bottom surface and an upper side of the first standing portion, and a first curved portion convexly curved toward the upper side It is provided, and the second bow portion is connected to an upper side of the second standing portion and the second standing portion standing up from the bottom surface, and includes a second curved portion convexly curved upward, and the curvature of the first bending portion. The size of the radius may be smaller than the size of the radius of curvature of the second bend.

The first bent portion of the foam sheet manufacturing apparatus according to an embodiment of the present invention is connected to both ends of the first horizontal portion and the first horizontal portion connected to the first standing portion, and is convexly curved upward. A first bow portion, the first horizontal portion, the length can be changed, the first bow portion, the size of the radius of curvature is changed according to the length change of the first horizontal portion, the second bent portion, The second horizontal portion connected to the second standing portion and the second horizontal portion connected to both ends of the second horizontal portion, and having a second curved portion convexly curved upward, the second horizontal portion, the length can be changed, The size of the radius of curvature may be changed according to a change in the length of the second horizontal portion of the second bow portion.

The winding portion of the foam sheet manufacturing apparatus according to an embodiment of the present invention, a first roller portion disposed at a first height equal to the height of the spread portion, disposed on the lower side of the first roller portion lower than the first height A second roller portion disposed at a second height and disposed adjacent to the second roller portion, while being disposed adjacent to the third roller portion and the third roller portion disposed at a third height higher than the first height , The foam sheet is provided with a wick portion to be wound, and the foam sheet moved through the spread portion may be wound around the wick portion via the first roller portion, the second roller portion, and the third roller portion.

The antistatic portion of the foam sheet manufacturing apparatus according to an embodiment of the present invention, while being disposed on the lower side of the first roller portion, via the first roller portion, water vapor on the foam sheet is moved to the second roller portion Can be sprayed.

The first roller portion and the second roller portion of the foam sheet manufacturing apparatus according to an embodiment of the present invention are formed in a hollow cylinder, a plurality of communication holes passing through the outer surface are formed, and the plurality of communication holes Silver, by providing a passage through which the water vapor generated by the anti-static portion is moved, it can be diffused to the front or rear of the foam sheet in motion.

According to the present invention, the static electricity generated on the unfolded foam sheet or the static electricity generated on the winding member on which the foam sheet is wound is canceled, so that productivity is reduced due to sparks caused by static electricity, product quality is reduced, and safety problems are prevented. Can be.

In addition, a series of manufacturing processes leading to input, mixing, extrusion, spreading and winding of raw materials for the production of the foam sheet are automated, so that productivity can be significantly improved.

1 is a schematic perspective view showing a foam sheet manufacturing apparatus according to an embodiment of the present invention.
Figure 2 is a schematic side view showing a foam sheet manufacturing apparatus according to an embodiment of the present invention.
Figure 3 is a schematic diagram for explaining the mixing portion and the melting portion of the foam sheet manufacturing apparatus according to an embodiment of the present invention.
Figure 4 is a schematic diagram for explaining the cooling unit of the foam sheet manufacturing apparatus according to an embodiment of the present invention.
5 to 8 are schematic diagrams for explaining the extruding part, the filter part and the filter replacement part of the foam sheet manufacturing apparatus according to an embodiment of the present invention.
9 and 10 are schematic diagrams for explaining the spread portion of the foam sheet manufacturing apparatus according to an embodiment of the present invention.
Figure 11 is a schematic diagram for explaining the antistatic portion of the foam sheet manufacturing apparatus according to an embodiment of the present invention.
12 is a schematic view for explaining the winding portion of the foam sheet manufacturing apparatus according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and a person skilled in the art who understands the spirit of the present invention may add another component within the scope of the same spirit, change, delete, etc. Other embodiments that are included within the scope of the invention idea can be easily proposed, but this will also be included within the scope of the invention.

In addition, elements having the same functions within the scope of the same idea appearing in the drawings of the respective embodiments will be described using the same reference numerals.

1 is a schematic perspective view showing a foam sheet manufacturing apparatus according to an embodiment of the present invention, Figure 2 is a schematic side view showing a foam sheet manufacturing apparatus according to an embodiment of the present invention.

In addition, Figure 3 is a schematic diagram for explaining the mixing and melting of the foam sheet manufacturing apparatus according to an embodiment of the present invention, Figure 4 is for explaining the cooling unit of the foam sheet manufacturing apparatus according to an embodiment of the present invention It is a schematic diagram.

1 to 4, the foam sheet manufacturing apparatus 1 according to an embodiment of the present invention may be an apparatus for manufacturing a polyethylene foam sheet S by mixing polyethylene raw materials, blowing agents and additives.

Foam sheet manufacturing apparatus 1 of the present invention, the mixing section 10, the melting section 20, the cooling section 30, the extrusion section 40, the filter section 50, the filter replacement section 60, cutting A portion 70, a spread portion 80, a winding portion 90 and an anti-static portion 100 may be included.

The mixing unit 10 may include a raw material injection unit 11 into which the polyethylene raw material is injected, and a material injection unit 13 through which the blowing agent and additives are moved.

Here, the polyethylene raw material is produced in a circular fine spherical shape, and the blowing agent and additive may also be manufactured in a circular fine spherical shape.

The raw material input portion 11 is formed in the height direction can be in communication with the mixing space of the mixing portion 10, the material injection portion 13 is formed in the longitudinal direction, the mixing of the mixing portion 10 It can communicate with space.

The mixing unit 10 may generate minute vibrations, so that the injected polyethylene raw material and the blowing agent and additives can be mixed.

The melting section 20 is connected to the mixing section 10, and may be melted by applying heat to the mixture mixed in the mixing section 10. The melting portion 20 is formed of a cylindrical first pipe 21, provides a passage through which the mixture is moved, and applies heat from the outside of the first pipe 21 to open the first pipe 21 It is possible to allow the mixture to be moved to melt.

The cooling unit 30 may be connected to the melting unit 20 and cool the mixture melted in the melting unit 20. The cooling unit 30, while formed as a cylindrical second pipe 31, provides a passage through which the molten mixture is moved, cools the outside of the second pipe 31, and the mixture is moved along the pipe Allow it to cool.

Specifically, the cooling unit 30 is provided with a cooling water injection unit 33 for continuously spraying low-temperature water to the outside of the second pipe 31, so that the temperature of the pipe can be lowered, and the melting unit The mixture liquefied by (20) can be changed into a gel form.

The extruded portion 40 is connected to the cooling portion 30, and can extrude the cooled mixture through a ring-shaped die.

The filter unit 50, evenly disposed between the cooling unit 30 and the extruding unit 40, can even the particles of the mixture moving from the cooling unit 30 to the extruding unit 40. have.

The filter replacement unit 60 is equipped with the filter unit 50, and the filter unit 50 disposed in a communication space between the cooling unit 30 and the extrusion unit 40 is taken out to the outside or outside. The filter unit 50 may be brought into the communication space. Here, the outside of the filter unit 50 disposed in the communication space and the outside of the filter unit 50 located outside can be implemented at the same time.

The cutting part 70 may cut a cylindrical foam sheet S extruded through the extruding part 40 to be a flat foam sheet S.

Specifically, the cutting portion 70, by cutting the hollow cylindrical foam sheet (S) extruded through the extruding portion 40, to be unfolded, can be wound on the winding portion 90 layer by layer. .

The spread portion 80 may be formed so that the foam sheet S cut by the cutting portion 70 does not overlap and unfolds.

Specifically, the foam sheet (S) before being cut by the cutting part 70 forms a cylindrical shape with two ends overlapping, but both ends are connected, but immediately after being cut by the cutting part 70 There may be unfolded with both ends spaced apart. At this time, the component for spreading the foam sheet S cut by the cutting unit 70 is the spread unit 80.

The spread portion 80, the both ends are spaced apart, performs the operation of spreading the form sheet (S) that is not fully expanded.

The winding part 90 may allow the foam sheet S unfolded by the spread part 80 to be wound up.

The static electricity prevention part 100 may prevent static electricity from being generated between the foam sheet S and the winding part 90 while being disposed between the winding part 90 and the spread part 80. .

5 to 8 are schematic views for explaining the extruded portion, the filter portion and the filter replacement portion of the foam sheet manufacturing apparatus according to an embodiment of the present invention.

5 to 8, the filter replacement unit 60 of the foam sheet manufacturing apparatus 1 according to an embodiment of the present invention, the intermediate portion 61, the filter insertion portion 63 and the cylinder portion 65 ).

The intermediate portion 61 may be disposed between the extruded portion 40 and the cooling portion 30.

The intermediary portion 61 is perpendicular to the first through portion 611 and the first direction D1 penetrated in the first direction D1 toward the extruded portion 40 from the cooling portion 30. A second through portion 613 penetrated in the second direction D2 may be provided.

Here, the second direction D2 is not a height direction, but a horizontal direction with the ground.

The first through portion 611 may provide a movement path of the mixture from the cooling portion 30 to the extruding portion 40.

The second through portion 613 may provide a movement passage of the filter insertion portion 63.

The intermediate part 61 may include a support part 615 protruding in the second direction D2 while a part is inserted into the second through part 613.

The support portion 615, while the filter insertion portion 63 is mounted, provides a space for sliding, while the cylinder portion 65 is mounted, the filter insertion portion by the cylinder portion 65 ( The cylinder portion 65 may be supported so that 63) can be moved.

The filter insertion portion 63 is slid along the support portion 65 and may form an insertion space into which the filter portion 50 is inserted.

Specifically, the filter inserting portion 63 may include a first space providing piece 631 and a second space providing piece 632 that provide a space into which the filter part 50 is inserted.

The first space providing piece 631 may form a first insertion space 631a into which the filter unit 50 is inserted in the center, and the second space providing piece 632 may include the filter in the center. A second insertion space 632a into which the portion 50 is inserted may be formed.

When the first space providing piece 631 is inserted into the second through portion 613, the second space providing piece 632 may be exposed to the outside.

In addition, when the second space providing piece 632 is inserted into the second through portion 613, the first space providing piece 631 may be exposed to the outside.

The first space providing piece 631 and the second space providing piece 632 are arranged side by side in the second direction D2, and are slid along the second through portion 613 to cool the air. It may be disposed in the communication space between the portion 30 and the extruded portion 40 or may be separated from the communication space.

Specifically, when the first space providing piece 631 is disposed in the communication space, the filter unit 50 inserted in the insertion space of the first space providing piece 631 is from the cooling unit 30 It is disposed on the movement path of the mixture to be moved to the extruded portion 40, it is possible to even the particles in the mixture to be moved.

In addition, when the filter inserting portion 63 is slid along the second through portion 613, and the second space providing piece 632 is disposed in the communication space, the second space providing piece 632 The filter unit 50 inserted in the insertion space of the mixture is disposed on a moving path of the mixture moving from the cooling unit 30 to the extruding unit 40, so that particles in the moving mixture are even.

At this time, the first space providing piece 631 may be separated from the communication space and exposed to the outside. This is, when the filter unit 50 mounted in the insertion space of the first space providing piece 631 is low in filter efficiency according to the accumulation of foreign matter, the first space providing piece 631 is required when repair or replacement is required. The filter unit 50 is to be exposed to the outside.

In addition, when the filter unit 50 of the first space providing piece 631 is exposed to the outside, the second space providing piece 632 is arranged in the communication space, so that mixture filtering can be continuously implemented. Can be.

In summary, the first space providing piece 631 and the second space providing piece 632 are mutually complementary, and when filtering by the filter unit 50 in the first space providing piece 631 is implemented In, the repair or replacement of the second space providing piece 632 may be implemented, and when the filtering by the filter unit 50 in the second space providing piece 632 is implemented, the first space providing piece ( Repair or replacement of 631) can be implemented.

The cylinder portion 65 is connected to the filter insertion portion 63, and the filter insertion portion 63 can be made to slide along the intermediary portion 61.

The filter unit 50 is formed in an annular shape, and is provided with a hollow of the frame unit 51 and the frame unit 51 mounted in the insertion space, and extruded from the cooling unit 30 It may be provided with a filter portion 53 to filter the mixture to be moved to the portion (40).

The filter part 53 may include a first filter mesh piece 531, a second filter mesh piece 532, and a third filter mesh piece 533 sequentially stacked along the first direction D1.

In the order of the first filter mesh piece 531, the second filter mesh piece 532, and the third filter mesh piece 533, the size of the through holes constituting the mesh may be reduced.

Accordingly, the mixture moved from the cooling unit 30 to the extrusion unit 40 passes through the first filter network piece 531, and after passing through the second filter network piece 532, finally, the The third filter mesh piece 533 is passed through, and while passing through the filter mesh piece, the particle size may gradually decrease.

This is to increase the moving speed of the mixture and to increase the filtering efficiency by sequentially reducing the size of the through-holes. If, when filtering is performed while only one through hole having a large size is formed in the filter unit 50, the size of the particles becomes large, and the foam sheet S extruded through the extrusion unit 40 is not densely configured, When filtering is performed while only one through hole of a small size is formed in the filter part 50, the size of the particles becomes small, but a mixture moving from the cooling part 30 toward the extruding part 40 is accumulated, and a desired yield is obtained. It is difficult to secure.

In the present invention, the filter network constituting the filter unit 50 is composed of three stages, and the mixture is primarily filtered through the first filter network piece 531, and the mixture is filtered through the second filter network piece 532. It is filtered by the third filter, so that the mixture is filtered thirdly through the third filter network piece 533, thereby increasing the filtering speed and increasing the filtering efficiency.

9 and 10 are schematic diagrams for explaining the spread portion of the foam sheet manufacturing apparatus according to an embodiment of the present invention.

9 and 10, the spread portion 80 of the foam sheet manufacturing apparatus 1 according to an embodiment of the present invention includes a first bow portion 81 and a second bow portion 82. Can be.

The first rod portion 81 may be disposed between the cutting portion 70 and the winding portion 90.

In addition, the first bow portion 81 is connected to an upper side of the first standing portion 811 and the first standing portion 811 standing from the bottom surface, and a first curved portion convexly curved toward the upper side ( 813).

The second rod portion 82 is disposed to be spaced apart from the first rod portion 81, and may be disposed between the first rod portion 81 and the winding portion 90.

In summary, the first rod 81 and the second rod 82 may be arranged in order from the cutting portion 70 toward the winding portion 90.

In addition, the second bow portion 82 is connected to an upper side of the second standing portion 821 and the second standing portion 821 standing from the bottom surface, and a second curved portion convexly curved toward the upper side ( 823).

The size of the radius of curvature of the first bend 813 may be smaller than the size of the radius of curvature of the second bend 823.

The foam sheet S cut by the cutting part 70 is in a state of being bent with a radius of curvature smaller than the size of the radius of curvature of the first bend 813 before being contacted with the first bend 813 , While in contact with the first bend 813, may be in a state of being unfolded to correspond to the size of the radius of curvature of the first bend 813 during movement.

In addition, after contact with the second bent portion 823, the second bent portion 823 may be moved to the winding portion 90 in an unfolded state to correspond to the size of the radius of curvature of the second bend portion 823.

The first bent portion 813 is connected to both ends of the first horizontal portion 813a and the first horizontal portion 813a connected to the first standing portion 811, and is convexly curved upward. A first bow portion 813b may be provided.

The first horizontal portion 813a may have a length change.

The size of the radius of curvature of the first bow portion 813b may be changed according to a change in length of the first horizontal portion 813a.

Specifically, the first bow portion 813b is formed of a material deformable by external force, and a degree of bending may be changed according to a change in length of the first horizontal portion 813a connected across the length.

The size change of the radius of curvature of the first bow portion 813b may vary depending on the thickness, material, elasticity, and extrusion temperature of the extruded foam sheet S.

Specifically, according to the characteristics of the foam sheet (S) described above, the degree of bending of the foam sheet (S) after being cut by the cutting unit 70 may be determined, and the first bow portion 813b for unfolding it And the degree of bending of the second bow portion 823b should also be changed.

For example, when the size of the radius of curvature of the foam sheet S cut by the cutting unit 70 is relatively small, the size of the radius of curvature of the first bow portion 813b is also relatively small, so that the contacted foam sheet (S) can be gradually unfolded. Here, if the size of the radius of curvature of the first bow portion 813b is relatively large, the end of the contacted foam sheet S may be folded or the size of the radius of curvature may not be increased, and a problem may be caused to move as it is. have.

The second curved portion 823 is connected to both ends of the second horizontal portion 823a and the second horizontal portion 823a connected to the second standing portion 821, and is convexly curved upward. A second bow portion 823b may be provided.

The second horizontal portion 823a may have a length change.

The size of the radius of curvature of the second bow portion 823b may be changed according to a change in length of the second horizontal portion 823a.

The second bow portion 823b may be changed depending on the size of the radius of curvature of the first bow portion 813b.

11 is a schematic view for explaining the antistatic portion of the foam sheet manufacturing apparatus according to an embodiment of the present invention.

Referring to FIG. 11, the anti-vibration unit according to an embodiment of the present invention may include a steam generator 110 and an injection unit 120.

The steam generator 110 may be a device that generates water vapor.

The spraying unit 120 may spray water vapor generated from the steam generating unit 110 into the foam sheet S spread by the spreading unit 80.

The water vapor injected from the injection unit 120 is electro-friendly and may serve to make surrounding charges neutral.

Specifically, the spraying unit 120 provides water vapor so that static electricity generated on the foam sheet S spread by the spread portion 80 or static electricity generated on the winding portion 90 is canceled out. Can be.

For reference, static electricity build-up in the manufacturing environment can lead to reduced productivity, reduced product quality, and safety problems due to uncontrolled sparks.

The injection unit 120 may include a plurality of injection pieces arranged radially along the direction from the spread unit 80 toward the winding unit 90.

Each of the injection pieces constituting the plurality of injection pieces is connected to the connection part 121 connected to the steam generator 110 and the ends of the connection parts 121 and extends toward the lower side of the winding part 90. An extension portion 123 may be provided.

The length of the extension portion 123 may be changed from an end of the connection portion 121.

Specifically, the extension portion 123 is a member to which water vapor generated by the steam generator 110 is sprayed to the outside, water vapor may be injected from the end of the extension portion 123, and the extension portion ( The location where water vapor is injected may be determined according to the length of the extension from the connecting portion 121 of 123).

Alternatively, the extension part 123 may be formed to change in length at regular time intervals from the connection part 121, so that a water vapor diffusion region to the winding part 90 is widened.

12 is a schematic view for explaining the winding portion of the foam sheet manufacturing apparatus according to an embodiment of the present invention.

Referring to Figure 12, the winding portion 90 of the foam sheet manufacturing apparatus 1 according to an embodiment of the present invention, the first roller portion 91, the second roller portion 92, the third roller portion ( 93) and the wick part 95 may be provided.

The first roller portion 91 may be disposed at a first height H1 equal to the height of the spread portion 80.

The second roller portion 92 may be disposed at a lower side of the first roller portion 91 and may be disposed at a second height H2 lower than the first height H1.

The third roller portion 93 is disposed adjacent to the second roller portion 92, and may be disposed at a third height H3 higher than the first height H1.

The foam sheet S may be wound while the wick portion 95 is disposed adjacent to the third roller portion 93.

The foam sheet (S) moved through the spread portion 80 is passed through the first roller portion 91, the second roller portion 92, and the third roller portion 93, the wick portion ( 95).

The anti-static portion 100 is disposed on the lower side of the first roller portion 91, via the first roller portion 91, the foam sheet is moved to the second roller portion 92 Water vapor can be injected onto (S).

The first roller portion 91 and the second roller portion 92 are formed in a hollow cylindrical shape, and a plurality of communication holes penetrating the outer surface may be formed.

The plurality of communication holes, by providing a passage through which the water vapor generated by the anti-static unit 100 is moved, can be spread to the front or back of the moving foam sheet (S).

In the above, the configuration and features of the present invention have been described based on the embodiment according to the present invention, but the present invention is not limited to this, and various modifications or changes can be made within the spirit and scope of the present invention. It is apparent to those skilled in the art, and thus, such changes or modifications are found to be within the scope of the appended claims.

1: Foam sheet manufacturing equipment
10: mixing unit
20: melting part
30: cooling section
40: extrusion
50: filter unit
60: filter replacement part
70: cutting section
80: spread section
90: winding part
100: antistatic part

Claims (11)

In the foam sheet manufacturing apparatus for producing a polyethylene foam sheet by mixing the polyethylene raw material, blowing agent and additives,
A mixing unit having a raw material input part into which the polyethylene raw material is introduced and a material input part through which the foaming agent and additives are moved;
A melting unit connected to the mixing unit and melting heat by applying heat to the mixture mixed in the mixing unit;
A cooling unit connected to the melting unit and cooling the mixture melted in the melting unit;
An extruder connected to the cooling unit and extruding the cooled mixture through a ring-shaped die gap;
A filter unit arranged between the cooling unit and the extruding unit to even out particles of a mixture that is moved from the cooling unit to the extruding unit;
A cutting unit for cutting a cylindrical foam sheet extruded through the extruding unit to become a flat foam sheet;
A spreading portion that allows the foam sheets cut by the cutting portions to be unfolded and unfolded;
A winding portion on which the foam sheet unfolded by the spread portion is wound; And
It is disposed between the winding portion and the spread portion, an anti-static portion for preventing the generation of static electricity between the foam sheet and the winding portion; includes,
The spread unit,
A first bow part disposed between the cutting part and the winding part and a second bow part arranged to be spaced apart from the first bow part, and disposed between the first bow part and the winding part,
The first bow portion,
A first standing portion standing from the bottom surface and connected to an upper side of the first standing portion, and having a first curved portion convexly curved toward the upper side,
The second bow portion,
A second standing portion standing from the bottom surface and connected to an upper side of the second standing portion, and having a second curved portion convexly curved toward the upper side,
The size of the radius of curvature of the first bent portion is
Foam sheet manufacturing apparatus, characterized in that less than the size of the radius of curvature of the second bent portion.
According to claim 1,
The filter unit is mounted, and a filter replacement unit that allows the filter unit disposed in the communication space between the cooling unit and the extruding unit to be taken out to the outside or the external filter unit is brought into the communication space.
The filter replacement unit,
The intermediate part disposed between the extruding part and the cooling part, sliding along the intermediate part, connected to the filter inserting part and the filter inserting part to form an inserting space into which the filter part is inserted, and the filter inserting part interposing the mediating part It is provided with a cylinder for sliding along,
The mediator,
A first through portion penetrated in the first direction toward the extruded portion from the cooling portion and a second through portion penetrated in a second direction perpendicular to the first direction,
The first through portion,
To provide a passage for the mixture to move from the cooling section to the extrusion section,
The second through portion,
Foam sheet manufacturing apparatus characterized in that it provides a moving passage of the filter insert.
According to claim 2,
The filter insert,
A first space providing piece and a second space providing piece providing a space into which the filter part is inserted,
The first space providing piece and the second space providing piece,
It is arranged side by side in the second direction,
When the first space providing piece is inserted into the second through portion, the second space providing piece is exposed to the outside, and when the second space providing piece is inserted into the second through portion, the first space providing piece Foam sheet manufacturing apparatus characterized in that it is exposed to the outside.
According to claim 3,
The filter unit,
While being formed in an annular shape, a frame part mounted in the insertion space and a filter part mounted in the hollow of the frame part are provided with a filter part that filters the mixture moved from the cooling part to the extrusion part,
The manure part,
It is composed of a first filter mesh piece, a second filter mesh piece and a third filter mesh piece sequentially stacked along the first direction,
Foam sheet manufacturing apparatus characterized in that the size of the through-holes constituting the network in the order of the first filter mesh piece, the second filter mesh piece and the third filter mesh piece.
According to claim 2,
The anti-static unit,
It has a steam generating portion for generating water vapor and an injection unit for spraying water vapor generated from the steam generating portion to the foam sheet spread by the spread portion,
The injection unit,
And a plurality of spray pieces arranged radially along the direction from the spread portion toward the winding portion,
Each of the injection pieces constituting the plurality of injection pieces,
Foam sheet manufacturing apparatus characterized in that it comprises a connecting portion connected to the steam generator and the end of the connecting portion, extending to the lower side of the winding portion.
The method of claim 5,
The extension,
Foam sheet manufacturing apparatus characterized in that the length is changed from the end of the connecting portion.
delete According to claim 1,
The first bent portion,
The first horizontal portion connected to the first standing portion and the first horizontal portion connected to both ends of the first horizontal portion, and having a first bow portion convexly curved upward,
The first horizontal portion, the length can be changed,
The first bow-shaped portion, the size of the radius of curvature is changed according to the length change of the first horizontal portion,
The second bent portion,
The second horizontal portion connected to the second standing portion and the second horizontal portion connected to both ends of the second horizontal portion, and having a second curved portion convexly curved upward,
The second horizontal portion, the length can be changed,
The second bow-shaped portion, the foam sheet manufacturing apparatus characterized in that the size of the radius of curvature changes according to the length change of the second horizontal portion.
The method of claim 8,
The winding part,
A first roller portion disposed at a first height equal to the height of the spread portion, a second roller portion disposed at a lower side of the first roller portion and disposed at a second height lower than the first height, and the second roller portion A third roller portion disposed adjacent to the third height higher than the first height and a wick portion wound around the foam sheet while being disposed adjacent to the third roller portion,
The form sheet moved through the spread unit,
Foam sheet manufacturing apparatus, characterized in that wound on the core portion via the first roller portion, the second roller portion and the third roller portion.
The method of claim 9,
The anti-static unit,
Foam sheet manufacturing apparatus, characterized in that, while being disposed on the lower side of the first roller portion, via the first roller portion, spraying water vapor onto the foam sheet moved to the second roller portion.
The method of claim 10,
The first roller portion and the second roller portion,
It is formed in a hollow cylinder, and a plurality of communication holes penetrating the outer surface are formed,
The plurality of communication holes,
Foam sheet manufacturing apparatus characterized in that to provide a passage through which the water vapor generated by the anti-static unit is moved, to diffuse to the front or rear of the moving foam sheet.

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