KR101955855B1 - Extruding Mold for Manufacturing Hollow Form And Its Products - Google Patents

Abstract

The present invention relates to an extrusion die for manufacturing a foamed resin molded article having a hollow portion and a foamed resin molded article produced through the die. The hollow portion is formed in the longitudinal direction to increase the strength and the strength of the metal material A pre-mold for molding a foamed resin into a foamed resin molding in a semi-formed state so that a foamed resin molded article which can be used as a structural material by inserting and supporting a stiffener such as a pipe or a round bar of the foamed resin is formed; The foamed resin molded article in the semi-molding state is provided with an upper horizontal portion, an inner wall portion protruding downward in the middle of the upper horizontal portion for the hollow portion, and a hollow portion protruding downward from both sides of the upper horizontal portion to come in contact with the inner wall portion And a lower horizontal part formed by contacting a first horizontal wing extending symmetrically to both sides of the lower end of the inner wall part and a second horizontal wing extending from a lower end of the outer wall part, (After) a mold for extrusion molding. The present invention also provides an extrusion die for manufacturing a foamed resin molding.

Description

TECHNICAL FIELD [0001] The present invention relates to an extruding mold for manufacturing a foamed resin molding having a hollow portion,

The present invention relates to a foamed resin molded article which can increase the strength by forming a hollow portion in the longitudinal direction inside the foamed resin molded product during the extrusion molding and inserts and supports a reinforcing material such as a metal pipe or a round bar, An extrusion die capable of producing a resin molding, and a foamed resin molding produced through the die.

Generally, various types of materials are used for the production of buildings and ornaments.

When wood products such as tubular members, rod members, and plate members are usually made of wood, it is necessary to perform a lot of cutting and processing operations in the initial processing operation, and a large amount of time and workforce are input. And it is inefficient, uneconomical, and environmentally destructive.

In addition, due to the loss of raw materials in the process of secondarily processing the first processed wood and obtaining the building interior materials and the like, due to the nature of the building interior material such as wood, etc., due to the twisting and twisting phenomenon due to the humidifying action, And the like, have been pointed out.

On the other hand, a plywood or a high-compression reinforced wood which is light and easy to work with is used to attach a film having a textural effect of wood on its surface or impregnated with a peeling veneer, In the case of the construction interior material, a phenomenon that a film or a veneer is peeled off from the panel is generated, and the cost of maintenance due to repairs is lowered by lowering the product value by damaging the aesthetic appearance.

On the other hand, in recent years, a foaming agent has been added to a thermoplastic resin to replace the wood, which has effects such as stiffness and strength, dimensional stability and shrinkage strain of change, and improvement of surface condition, And moldings that can be used as building interior materials are being manufactured.

As an example of such a foam molding apparatus, Registration No. 10-1199741 has been proposed. A first mold having a first molding part for guiding molding of a foamed molding when the foamed resin discharged from the head of the extruder flows through an inlet of the first face; A second molding part through which the foamed molding passed through the first molding part moves, and a guide groove part through which the air introduced through the air inflow path moves is formed on the second opposite side A third forming part through which the foamed molding moving through the second forming part moves is formed through the second surface of the second mold and the air in the guide groove part of the second mold is inserted into the second mold, And a third mold having a moving air outflow path formed along an edge of the third forming part.

According to this construction, the foamed resin raw material in which the foaming agent and the synthetic resin raw material are mixed is melted and foamed in a high temperature through an extruder, and is swollen as it is discharged through the extruder head and deformed in its cross-sectional shape. The foamed molding is completed.

However, in the conventional foam molding apparatus, since the structure of the extruder head and the structure of the post-processing apparatus are simple, the cross-sectional shape of the extruder head is filled with foamed articles such as tubular members, rod members and plate members. It is difficult to use as a structure and mainly used as an exterior material, so its use is limited.

Reference literature: Registration No. 10-1199741

Accordingly, the present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide an extrusion mold for manufacturing a foamed resin molding capable of increasing the strength by forming a hollow portion in the longitudinal direction inside the foamed resin molding during extrusion molding, It is an object of the present invention to provide a resin molding.

In addition, the present invention can form a hollow part capable of maintaining a uniform flatness inside and can manufacture a foamed resin molded article which can be used as a structural material by inserting and supporting a reinforcing material such as a metal pipe or a round bar, And an object of the present invention is to provide an extruded metal mold and a foamed resin molded product produced through the metal mold.

Another object of the present invention is to provide an extrusion mold capable of producing a foamed resin molded article in which a plurality of hollow portions are formed side by side in the longitudinal direction, and a foamed resin molded product produced through the mold.

In order to solve such a technical problem,

A pre-mold for molding the foamed resin into a foamed resin molded product in a semi-molded state; The foamed resin molded article in the semi-molding state is provided with an upper horizontal portion, an inner wall portion protruding downward in the middle of the upper horizontal portion for the hollow portion, and a hollow portion protruding downward from both sides of the upper horizontal portion to come in contact with the inner wall portion And a lower horizontal part formed by contacting a first horizontal wing extending symmetrically to both sides of the lower end of the inner wall part and a second horizontal wing extending from a lower end of the outer wall part, (After) a mold for extrusion molding. The present invention also provides an extrusion die for manufacturing a foamed resin molding.

At this time, the wire mold is provided with a preforming portion for guiding the foaming resin discharged from the extruder head to form a foamed resin molding in a semi-molding state; Wherein the wire forming portion of the wire mold comprises an upper horizontal line forming space formed horizontally so as to form an upper horizontal portion when the foamed resin is moved, an inner wall forming space forming an inner wall portion vertically downward in the middle of the upper horizontal forming space, An outer wall part forming space for forming an outer wall part inclined downwardly outward from both ends of the upper horizontal line forming space and a second horizontal forming part for forming a lower horizontal part symmetrically extending on both sides of the lower end of the inner wall part forming space, A second horizontal wing line forming unit for forming a second horizontal wing portion extending downward inwardly inward at a lower end of the outer wall forming space to form a lower horizontal portion, the first horizontal wing portion forming space forming a wing portion, And a space.

The rear mold is spaced apart from the wire mold, and the rear mold is formed of a plurality of first to fourth rear molds, and the first to fourth rear molds are formed with first to fourth rear molding portions.

In addition, the first post-forming part of the first after-mold includes an upper horizontal post-forming space for forming the upper horizontal portion of the foamed resin molded article so as to have a flatness when the foamed resin molded product in the semi-processed state is moved, An inner wall post-forming space formed so as to vertically downward in the middle of the space and having an inner wall portion having a flatness, and an outer wall portion formed to guide and form the outer wall portion to be folded in a direction vertically downward at both ends of the upper horizontal post- A molding space, a first horizontal wing portion post-molding space for horizontally guiding and forming the first horizontal wing portion having a flatness for forming the lower horizontal portion, and a second horizontal wing portion rear molding space at the lower end of the outer wall post- And a second horizontal wing portion post-molding space for guiding and horizontally folding it in the inward direction.

In the foamed resin molded product, first and second horizontal wing portions forming the lower horizontal portion are formed with first and second steps.

The present invention also provides a foamed resin molding produced through the above extrusion die.

According to the present invention, when the extruded mold is divided into a front mold and a rear mold to gradually deform the extruded resin molded product, a plurality of accommodating portions can be formed in the longitudinal direction. This can reduce the amount of foamed resin used, And the strength of the molded product is also increased.

In addition, the present invention can insert and support a reinforcing member such as a metal pipe which can improve the strength by forming a hollow portion capable of maintaining a uniform flatness by using a plurality of dies constituting a rear mold, Can be widely used as a structural material as well as an interior and exterior material of a building.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall configuration diagram of an extrusion die for manufacturing a foamed resin molded article having a hollow portion according to the present invention. Fig.
2 is an exploded view of a post-processing apparatus for manufacturing a foamed resin molding having a hollow portion according to the present invention.
FIGS. 3A to 3E are cross-sectional views illustrating a post-processing step of a foamed resin molded article having a hollow portion according to the present invention.
4 is a view showing another embodiment of a foamed resin molding having a hollow portion according to the present invention.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

1 to 3, an extrusion mold 1 for manufacturing a foamed resin molding having a hollow portion according to the present invention is formed by a pre-mold 100 and a post-mold 200 for stepwise molding a foamed resin molding, ).

At this time, when the foamed resin material containing the foaming agent and the synthetic resin raw material is injected into the hopper 10, the wire mold 100 is melted and foamed with high temperature through the extruder 20 and discharged through the extruder head 30, When the melted foamed resin P1 discharged through the extruder head 30 flows in, the foamed resin molded product P2 in a semi-molded state is produced by extrusion molding.

In the meantime, the post mold 200 is formed by passing the finished foamed resin molded product P3 having the hollow portions H1 and H2 while passing through the semi-processed foamed resin molded product P2 processed in the wire mold 100 ).

At this time, the extruder 20 has a known structure. When the foamed resin material is fed through the hopper 10, the foamed resin material is fed by the feed screw 22 and heated by a heater (not shown) And is discharged through the extruder head 30 in a melted and foamed state.

The molten foamed resin P2 discharged through the extruder head 30 flows into the extrusion die 1 according to the present invention and passes through the wire die 100 and the rear die 200 in order, (H) is completed.

In this case, the foaming resin raw material into which the foaming agent is added into the thermoplastic resin usually starts foaming at 140 ° C and has a high expansion efficiency when foamed at 170 to 180 ° C.

In particular, a final foamed resin molded product (P3) in which a plurality of hollow portions (H1, H2) are formed in the longitudinal direction in parallel can be manufactured through an extrusion die (1) for manufacturing a foamed resin molding according to the present invention.

Hereinafter, the constitution of each part of the present invention will be described in detail.

The line metal mold 100 is formed with a textured portion 110 for guiding the foamed resin P1 discharged from the extruder head 30 to form a foamed resin molded product P2 in a semi-formed state.

Such a wire mold 100 has a structure in which a plurality of molds are sequentially brought into close contact with each other and integrally joined to each other. Each of the molds is shaped so that the foamed resin P1 is moved sequentially and the foamed resin molded product P2 in a semi- The formation of the plurality of preformed portions 112 for inducing deformation is continuous but the shape of each mold is deformed.

However, in the present invention, the present invention is for line processing for manufacturing a finished foamed resin molded product (P3) having a hollow portion (H) The cross-sectional shape of the resin molded product P2 is important, and the shape of the preformed portion 110 for inducing the cross-sectional shape of the foamed resin molded product P2 in this semi-processed state is also important.

3E, the finished foamed resin molded product P3 has a plurality of hollow portions H1 and H2, and the final foamed resin molded product P3 has a reference upper horizontal portion Pa; An inner wall portion Pb protruding downward in the middle of the upper horizontal portion Pa for the hollow portions H1 and H2; An outer wall portion Pc protruding downward from both sides of the upper horizontal portion Pa to form hollow portions H1 and H2 in contact with the inner wall portion Pb; A first horizontal wing Pd1 extending symmetrically on both sides of the lower end of the inner wall Pb and a second horizontal wing Pd2 extended from a lower end of the outer wall Pc, (Pd).

That is, the final foamed resin molded product P3 has an end portion of the first horizontal wing portion Pd1 which is bent and extended at the lower end of the inner wall portion Pb and a second horizontal wing portion Pd1 which is bent and extended at the lower end of the outer wall portion Pc. (Pd2) are in contact with each other to be formed into a horizontal state to form a lower horizontal portion (Pd).

The foamed resin molded product P2 in a semi-processed state, in which the foamed resin P1 is discharged through the wire mold 100 to form the finished foamed resin molded product P3 having such a structure, has the same shape as in Fig. 3A .

More specifically, the foamed resin molded product P2 in the semi-processed state discharged through the wire mold 100 has an inner wall portion Pb protruding vertically downward in the middle of the upper horizontal portion Pa, The first horizontal wing portion Pd1 is formed to extend downward from both ends of the inner wall portion Pb so as to be symmetrical to the lower end of the inner wall portion Pb in order to form the lower horizontal portion Pd. And the second horizontal wing portion Pd2 is inclined downward from the lower end of the outer wall portion Pc to form the lower horizontal portion Pd.

In this case, in order to mold the foamed resin molded product P2 in the semi-processed state, the pre-formed portion 110 of the linear die 100 is horizontally formed so as to form the upper horizontal portion Pa when the foamed resin P1 moves, An inner wall forming space 114 for forming an inner wall portion Pb vertically downward in the middle of the upper horizontal forming space 112 and an inner wall forming space 114 for forming the upper horizontal forming space 112 112 formed symmetrically on both sides of the lower end of the inner wall forming space 114 to form an outer wall part Pc that slopes downward outward from both ends of the lower horizontal part A first horizontal wing portion forming space 118a for forming a first horizontal wing portion Pd1 for forming the first horizontal wing portion Pd and a second horizontal wing portion forming portion A second horizontal wing portion line Pd2 for forming a second horizontal wing portion Pd2 for forming the horizontal portion Pd, It comprises a spatial (118b).

At this time, the end of the second horizontal wing line forming space 118b is formed at a relatively lower position than the end of the first horizontal wing line forming space 118a, The second horizontal wing portion Pd2 is turned in the horizontal direction while the second horizontal wing portion Pd2 passes and the end of the second horizontal wing portion Pd2 is brought into contact with the first horizontal wing portion Pd1.

The semi-processed foamed resin molded product P2 discharged through the wire mold 100 is passed through the after-mold 200 to be molded into the final finished foamed resin molded product P3 as shown in FIG. 3E.

The rear mold 200 is spaced apart from the wire mold 100 and includes a plurality of first to fourth rear molds 200a, 200b, 200c, and 200d. The first to fourth molds 200a, 200b, 200c and 200d are formed with first to fourth subsequent moldings 210a, 210b, 210c and 210d, respectively. Each of the first to fourth molds 210a, 210b, 210c and 210d guides the foamed resin molded product P2 in a semi-molded state discharged from the wire mold 100 to form a finished foamed resin molded product P2, and a plurality of first to fourth molds 200a, 200b, 200c, and 200d are sequentially and tightly bonded to each other, and each of the molds is formed by sequentially forming the first to fourth molds 200a, 200b, 200c, 200d 210b, 210c, 210d in the first to fourth hairdressers 210a, 210b, 210c, 210d in the first to fourth hairdressers 210a, 210b, 210c, 210d. .

The number of the first through fourth molds 200a, 200b, 200c, and 200d constituting the rear mold 200 can be increased or decreased as needed.

Particularly, in the case of the first after-mold 200a, the cooling passage 202a through which the cooling water W for slowing the expansion of the foamed resin molded product P2 discharged from the previous metal mold moves is formed. 210a includes an upper horizontal post forming space 212a for forming the upper horizontal portion Pa of the foamed resin molded product P2 so as to have a flatness when the foamed resin molded product P2 in the semi-processed state is moved, An inner wall post-molding space 214a which is vertically downwardly formed in the middle of the post-molding space 212a so as to form the inner wall portion Pb so as to have a flatness, An outer wall post molding space 216a for guiding the outer wall portion Pc so as to be folded in the vertical downward direction and a first horizontal wing portion Pd1 for forming the lower horizontal portion Pd have a flatness A first horizontal wing portion post-molding space 218a horizontally guiding and forming the first horizontal wing portion post- After the second horizontal wing, which at the lower end of the mold space (216a) the second horizontal wing (Pd2) that has the flatness of the molding so as to guide horizontally folded inwardly comprises a forming space (219a).

The second through fourth subsequent moldings 210b, 210c, and 210d of the second through fourth molds 200b, 200c, and 200d are sequentially changed in shape so that the wall surface is finally formed at a right angle, So that the outer wall and bottom portion of the foamed resin molded product P2 are guided to be flatly formed.

In this case, the first after-mold 200a is formed of four mold parts 201a, 201b, 201c, and 201d, which are more complicated than the second through fourth molds 200b, 200c, and 200d, The fourth after-molds 200b, 200c and 200d are each composed of two mold parts 202a and 202b (203a and 203b) (204a and 204b). Of course, it is natural that the first through fourth molds 200a, 200b, 200c, and 200d can also be manufactured by adding or removing a plurality of mold parts, respectively, as needed.

The foamed resin molded product P2 in the semi-processed state is transferred through the mold 200 to the first to fourth subsequent moldings 210a, 210b, 210c, and 210d of the first to fourth molds 200a, 200b, 200c, 210d, which are sequentially passing through the two hollow portions H1 and H2,

To form a final foamed resin molded product (P3) of a finished shape. The molding process of the final foamed resin molding (P3) is shown in Figs. 3A to 3E. 3B is a sectional view of the final molded resin molded product P3 discharged from the linear die 100 and FIGS. 3B to 3E are sectional views of the first through fourth molds 200a, 200b, 200c, and 200d.

In addition, the post mold 200 cures the foamed resin molded product P2 in a water-cooled manner to suppress the expansion of the foamed resin molded product P2 and cool it to complete the final foamed resin molded product P3. In this case, the rear mold 200 is mounted in a water tank filled with cooling water to cool the foamed resin molding by a water-cooling method, and foreign matter sticking to the surface of the foamed resin molding can be removed.

The end portions of the first and second horizontal wing portions Pd1 and Pd2 forming the lower horizontal portion Pd are formed with the first and second steps Pda1 and Pda2 It is formed in a close contact structure so that it is resistant to warpage and strength is improved.

4 (a) and 4 (b) are views showing various molding examples of the final foamed resin molded product P3. As shown in FIG. 3E, the final foamed resin molded product P3 is formed not only of two hollows H1 and H2 as a whole, but also of three or more, for example, as shown in FIG. 4 (a) H3, H3, or four hollow portions H1, H2, H3, and H4 as shown in FIG. 4 (b).

The advantage of being strong in bending and light in weight by the plurality of hollow portions H1, H2 (H1, H2, H3) (H1, H2, H3, H4) formed in the finished foamed resin molded product P3 . Although the hollow sections H1 and H2 (H1, H2 and H3) (H1, H2, H3 and H4) have a rectangular cross section according to the drawings, the hollow sections H1 and H2 may be formed in various shapes And the outline section of the final foamed resin molded product P3 is also rectangular. However, it is also possible to produce various shapes such as a circle, a triangle, and a rectangle as necessary.

In addition, a reinforcement material such as a metal pipe or a round bar which can further enhance the strength of the final foamed resin molded product P3 is provided in the hollow portions H1, H2 (H1, H2, H3) And in this case, the final foamed resin molded product (P3) can also be used as a structural member.

Of course, apart from the hollow portions H1 and H2, the hollow portions H1, H2 and H3 (H1, H2, H3 and H4) are not claimed in the claims but are all within the scope of the present invention. It is obvious.

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,

1: extrusion mold 10: hopper
20: extruder 30: extruder head
100: wire mold 110:
200: after mold 200a: after first mold
200b: second after-mold 200c: third after-mold
200d: fourth post mold 210a: first posterior mold
210b: second posterior portion 210c: third posterior portion
210d: fourth forth mold portion H1, H2, H3, H4: hollow portion
P1: foaming resin P2, P3: foam resin molding
Pa: upper horizontal portion Pb: inner wall portion
Pc: outer wall portion Pd: lower horizontal portion
Pd1: first horizontal wing portion Pd2: second horizontal wing portion Pd2:

Claims (6)

A preceding mold 100 for molding the foamed resin P1 into a foamed resin molded product P2 in a semi-molded state; The foamed resin molded product P2 in the semi-molding state is divided into an upper horizontal portion Pa and an inner wall portion Pb protruding downward in the middle of the upper horizontal portion Pa for the hollow portions H1 and H2, An outer wall portion Pc protruding downward from both sides of the upper horizontal portion Pa to form hollow portions H1 and H2 in contact with the inner wall portion Pb; And a lower horizontal portion Pd in contact with the first horizontal wing portion Pd1 extended to the lower end of the outer wall portion Pc and the second horizontal wing portion Pd2 extending from the lower end of the outer wall portion Pc (P3), and a mold (200)
The end portions of the first and second horizontal wing portions Pd1 and Pd2 constituting the lower horizontal portion Pd of the foamed resin molded product P3 are formed with the first and second steps Pda1 and Pda2 Extrusion mold for the production of foamed resin molding.
The method according to claim 1,
The wire mold 100 is formed with a curved portion 110 for guiding the foamed resin P1 discharged from the extruder head 30 to mold the foamed resin molded product P2 in a semi-formed state,
The punctiform part 110 of the wire mold 100 includes an upper horizontal line forming space 112 formed horizontally to form an upper horizontal portion Pa when the expandable resin P1 is moved, And an outer wall portion Pc which is sloped downward outward at both ends of the upper horizontal line forming space 112 is formed at a lower portion of the upper horizontal line forming space 112. The inner wall portion forming space 114 forms an inner wall portion Pb vertically downward in the middle of the upper horizontal line forming space 112, A first horizontal wing portion Pd1 extending symmetrically to both sides of the lower end of the inner wall forming space 114 to form a lower horizontal portion Pd is formed And a second horizontal wing portion Pd2 extending inwardly downwardly inclined to form a lower horizontal portion Pd. The first horizontal wing portion forming space 118a has a first horizontal wing portion forming space 118a, , And a second horizontal wing line forming space (118b) for forming a second horizontal wing portion forming space Water for preparing the extrusion dies.
The method according to claim 1,
The rear mold 200 is spaced apart from the wire mold 100 and includes a plurality of first to fourth rear molds 200a, 200b, 200c and 200d. The first to fourth rear molds 200a, 200b, 200c, 200d are formed with first to fourth subsequent moldings 210a, 210b, 210c, 210d.
The method of claim 3,
The first subsequent mold portion 210a of the first after-mold 200a is formed so that the upper horizontal portion Pa of the foamed resin molded product P2 has a flatness when the foamed resin molded product P2 in the semi-processed state is moved An upper horizontal post molding space 212a and an inner wall post molding space 214a formed to vertically downwardly intermediate the upper horizontal forming space 212a and having an inner wall Pb having a flatness, An outer wall part molding space 216a for guiding the outer wall part Pc to be folded in a direction vertically downward at both ends of the upper horizontal part forming space 212a and a lower horizontal forming part 216b for forming a lower horizontal part Pd A first horizontal wing portion post forming space 218a for flatly forming the first horizontal wing portion Pd1 for guiding the first horizontal wing portion Pd1 horizontally and forming a second horizontal wing portion Pd2) has a flatness and is guided so as to be horizontally folded in the inward direction, (219a). ≪ RTI ID = 0.0 > 21. < / RTI >
A foamed resin molding produced through an extrusion die according to any one of claims 1 to 4.
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