KR20160135900A - Surface treatment device of Expanded Polypropylene molding article and Surface treatment methods - Google Patents
Surface treatment device of Expanded Polypropylene molding article and Surface treatment methods Download PDFInfo
- Publication number
- KR20160135900A KR20160135900A KR1020150068943A KR20150068943A KR20160135900A KR 20160135900 A KR20160135900 A KR 20160135900A KR 1020150068943 A KR1020150068943 A KR 1020150068943A KR 20150068943 A KR20150068943 A KR 20150068943A KR 20160135900 A KR20160135900 A KR 20160135900A
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- KR
- South Korea
- Prior art keywords
- molding
- foamed resin
- stiffener
- mold
- steam
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/18—Filling preformed cavities
- B29C44/187—Filling faulty voids in the foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3415—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3415—Heating or cooling
- B29C44/3426—Heating by introducing steam in the mould
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Abstract
Description
BACKGROUND OF THE
Generally, lightweight materials are widely used as packaging materials for automobile parts, electronic parts, and insulation materials. Expanded Poly-Propylene (EPP) and Expanded Polystyrene (EPS) are commonly used as these materials because they meet the required characteristics such as light weight, shock absorption, insulation, and thermal insulation.
In particular, EPP is an environmentally friendly synthetic resin foam that is excellent in flexibility, cracking resistance, repellency and chemical resistance. It is widely used in various fields such as energy absorber, cushion, And is also widely used as a packaging material for electronic products in the electronic industry.
Fig. 1 shows a conventional foamed resin molding apparatus for producing a molded body using a foamed resin.
Referring to FIG. 1, a conventional foam resin molding apparatus has a structure in which a
A raw material-
The
The
In order to form a molded body by the conventional foamed resin molding apparatus as described above, the raw material composed of the foamed resin is first injected into the
Next, the steam is introduced into the
Thereafter, the cooling water is supplied from the cooling water inlet
After cooling is completed, the
Such a conventional foamed resin molding apparatus and a molding method using the same are useful when manufacturing buffer packing materials for products such as agricultural and marine products and electronic products by maximizing the amount of foamed wastewater and increasing bufferability. There is a limit to manufacture a product having high strength and durability using a foamed resin.
One of the methods to compensate for this is to reduce the expansion ratio of the foamed resin to compensate the physical strength of the product itself. However, this method is contrary to the weight of the foam, which is the strength of the foam, There is a problem, and there are various difficulties in terms of technology and cost to manufacture a lightweight, high-strength molded body.
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a foamed resin molding apparatus and method capable of producing a high strength foamed resin molded article which can withstand a heavy load more than a molded body formed through a conventional foamed resin molding apparatus, .
It is another object of the present invention to provide a foamed resin molding apparatus and method capable of adjusting the strength as desired according to product use in the production of a foamed resin molded article, and a foamed resin molded article produced thereby.
According to an aspect of the present invention, there is provided a foamed resin molding apparatus for molding a foamed resin molded article by injecting a foamed resin into a molding space together with air,
A mold unit including a movable mold having a first molding unit and a stationary mold having a second molding unit corresponding to the first molding unit;
The foamed resin molding is separated from the mold part together with the foamed resin molding and is then slid off from the foamed resin molding again to form the foamed resin molding And a stiffener hole forming tool for forming at least one stiffener hole in the stiffener hole forming tool.
According to an aspect of the present invention, the stiffener hole forming tool includes: a plate-shaped base having a plurality of slots formed on a surface thereof to which the foam resin contacts; And a forming pin which is assembled at equal or unequal intervals in the slot and is vertically connected to the base, and a hole forming hole for forming the stiffener hole is formed at the uppermost portion.
Further, the base may be formed to have a size corresponding to the molding surface of the first molding portion or the second molding portion of the mold portion, and the opposite surface of the base contacting the foaming resin may be arranged to be in contact with the molding surface.
In addition, the base may have a plurality of vapor-permeable holes corresponding to the vapor holes of the molding surface.
The height of the forming pin may be 1/3 to 1/2 of the thickness of the foamed resin molded article to be foam molded in the molding space defined by the first molding section and the second molding section.
Further, the hole forming tool may be formed into a rod-like structure having a circular or triangular or more polygonal cross section.
In addition, the forming pins can be assembled to the slots of the base at different numbers and intervals according to the required strength of the foamed resin molding.
In addition, the movable mold and the stationary mold constituting the mold section are formed with a steam chamber, and the steam is supplied to the molding space for partitioning the first molding section and the second molding section through the steam chamber, And a steam supply unit connected to the steam chamber and supplying steam to the steam chamber.
A foaming resin supply unit installed in the mold unit for supplying the foaming resin to a molding space for partitioning the first molding unit and the second molding unit; And a cooling water supply unit connected to the mold unit and capable of supplying cooling water for cooling the foamed resin molding to the steam chamber.
According to another aspect of the present invention, as a means for solving the problem, there is provided a method of manufacturing a foamed resin molding machine, which comprises a step of forming a stiffener hole at a center in the thickness direction and a stiffener hole And a stiffener mounting portion composed of a long slit.
The foamed resin molded article according to another aspect of the present invention may further include a rigid stiffener inserted in the reinforcing material hole of the stiffener mounting portion to reinforce the rigidity of the foamed resin molded article.
As another example, the foamed resin molded article may include a plate-shaped transverse stiffener which is formed so as to protrude at a predetermined height from the surface of the foamed resin so as to reinforce the lateral rigidity of the foamed resin molded article, ; And
The through holes are formed at predetermined intervals so as to be positioned in the same line on the respective plate-shaped transverse stiffeners protruding on the surface of the foamed resin molded article, and the through holes located on the same line of the adjacent plate- And a rod-shaped longitudinal stiffener for reinforcing the longitudinal stiffness of the resin molded article.
As another example, the foamed resin molded article may include: a buried stiffener attached and fixed to the stiffener mounting portion in a state of being embedded in a foamed resin molding;
A portion of the reinforcing material is mounted and fixed to the stiffener mounting portion formed with the buried stiffener interposed therebetween and the other portion is formed to protrude at a predetermined height from the surface of the foamed resin and a protruding type reinforcement; And
And a reinforcement panel slidably assembled along the guide hole so as to be positioned in an assembling space where the protruding stiffener on the surface of the foamed resin molded article separates.
At this time, the reinforcing panel may be a heat insulating panel made of heat insulating material, or a cushion panel made of rubber or sponge.
The apparatus may further include a finishing panel covering the upper exposed surface of the reinforcing panel.
According to another aspect of the present invention as a means for solving the problems, there is provided a method of molding a foamed resin using the foamed resin molding apparatus according to one aspect,
Disposing a stiffener hole forming tool in the first forming portion of the movable mold or the second forming portion of the stationary mold while the movable mold and the stationary mold constituting the mold portion are spaced apart from each other;
Filling the molding space in which the movable mold is moved to the stationary mold side to mold the two molds and the first molding section and the second molding section are divided by the merging of the two molds;
The steam is supplied to the molding space through the steam supply unit connected to the movable mold and the stationary mold, heat is applied to the foamed resin, air is exchanged with steam between the foamed resins, Cooling the foamed resin molded article to be molded in the molding space;
Separating the movable mold from the stationary mold and separating the foamed resin molding from the molding space together with the stiffener hole forming tool; And
Separating the reinforcing material hole forming tool from the foamed resin molding body separated from the mold, and then reinforcing the rigidity of the foamed resin molding body by assembling a stiffener to a reinforcing material hole formed in the foamed resin molding by the stiffener hole forming tool; The present invention also provides a method for forming a foamed resin.
According to the foamed resin molding apparatus and method according to the embodiment of the present invention, the stiffener hole is formed by the stiffener hole forming tool in the foaming resin molding process, and the rigid reinforcing stiffener is inserted into the stiffener hole, It is possible to produce a high strength foamed resin molded article which can withstand a load which is heavier than that of a molded body formed through the molding.
Further, when forming the stiffener hole in the foamed resin molding by using the stiffener hole forming tool, the spacing and the number of the forming pins for forming the stiffener holes can be adjusted as desired, thereby achieving the optimum strength It is possible to manufacture a molded body, and it is possible to exclude that a reinforcing material is unnecessarily used.
1 is a schematic sectional view of a conventional foamed resin molding apparatus.
2 is a sectional view of a foamed resin molding apparatus according to one aspect of the present invention.
Fig. 3 is a perspective view illustrating a stiffener hole forming tool disposed in the stationary mold and the stationary mold of Fig. 2; Fig.
4 is a partially enlarged cross-sectional view of the stiffener forming tool of Fig.
FIG. 5 to FIG. 8 are operation states sequentially illustrating a process of manufacturing a foamed resin molded article by a foamed resin molding apparatus according to an aspect of the present invention.
9 is a perspective view of the molded body of Fig. 8 separated from the mold.
10 is a perspective view showing an embodiment of a foamed resin molded article according to another aspect of the present invention in which a reinforcing member is assembled to the molded body of FIG.
11 is a cross-sectional view of the foamed resin molded article of Fig. 10;
FIG. 12 is a perspective view showing another embodiment of a foamed resin molded article according to another aspect of the present invention in which a reinforcing member and a reinforcing panel are assembled to the molded body of FIG. 9;
Hereinafter, preferred embodiments of the present invention will be described in detail. In the description of the present invention, a detailed description of known configurations will be omitted, and a detailed description of configurations that may unnecessarily obscure the gist of the present invention will be omitted. The same members will be described using the same reference numerals.
FIG. 2 is a cross-sectional view of a foamed resin molding apparatus according to one aspect of the present invention, and FIG. 3 is a perspective view illustrating a stiffener hole forming tool disposed in the stationary mold and the stationary mold of FIG. And Fig. 4 is a partially enlarged cross-sectional view of the stiffener-forming tool of Fig.
2 to 4, a foamed resin molding apparatus according to an aspect of the present invention includes a
The
A
The foamed resin is supplied to the foamed resin supply part (not shown) supplied to the
The compressed air is supplied to the
The
For example, the
2,
The reinforcing material
The stiffener
When the
The height H of the forming
The number of the forming
Each of the reinforcing
FIGS. 5 to 8 are operation states showing a process of manufacturing a foamed resin molded article by a foamed resin molding apparatus according to an aspect of the present invention.
5 (a), the
Next, as shown in FIG. 5B, the
6, steam is supplied to the
The granular foam resin (f), which is bulky by the vapor, is heated to a predetermined temperature, and at the same time, the neighboring foaming resins are bonded to each other by bonding to each other to form a rigid structure. That is, as the surface of the foaming resin is melted by the steam, the foaming agent in the inside is expanded and the air between the foaming resins is removed, and at the same time, the foaming resin is firmly bonded to each other.
The foamed resin which is foamed in the
Next, the stiffener
At this time, in separating the foamed
Finally, the reinforcing material
10 is a cross-sectional view showing an embodiment of a foamed resin molded article according to another aspect of the present invention in which a reinforcing member is assembled to the molded body of FIG.
10, a foamed resin molded
The
Such a foamed resin molded
11 is a perspective view showing another embodiment of the foamed resin molded article according to another aspect of the present invention in which a reinforcing member is assembled to the molded body shown in Fig.
11, the foamed resin molded
In another embodiment, a portion of the plate-shaped
At this time, through-
The foamed resin molded
12 is a sectional view according to another embodiment of the foamed resin molded article.
12, the foamed
Specifically, the protruding
The reinforcing
The foamed
According to the foamed resin molding apparatus and method of the present invention, the stiffener hole is formed by the stiffener hole forming tool in the foaming resin molding process, and the stiffening reinforcement material is inserted into the stiffener hole, There is an advantage that a high strength foamed resin molded article capable of withstanding a heavy load than a molded body formed through a molding apparatus can be produced.
Further, when forming the stiffener hole in the foamed resin molding by using the stiffener hole forming tool, the spacing and the number of the forming pins for forming the stiffener holes can be adjusted as desired, thereby achieving the optimum strength It is possible to manufacture a molded body, and it is possible to exclude that a reinforcing material is unnecessarily used a lot
In the description of the present invention, only specific embodiments have been described. It is to be understood, however, that the invention is not to be limited to the specific forms thereof, which are to be considered as being limited to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .
105: mold part 106: stationary mold
107: movable mold 112: molding space
115: steam chamber 120: stiffener hole forming tool
122: Base 123: Slot
124: vapor permeable hole 126: forming pin
127: hole forming part 140: foaming resin supplying part
141: foaming resin supply pipe 145: foam resin storage container
150: steam supply unit 151: steam supply pipe
152: valve 153: steam outlet pipe
160: Cooling water supply part 161: Cooling water injection pipe
170: ejector unit 200: foamed resin molded article
210: stiffener hole 212: slit
220: rigid stiffener 230: transverse stiffener
231: through hole 232: longitudinal stiffener
240: buried stiffener 242: projected stiffener
243: guide sphere 245: reinforcing panel
247: Finishing panel
Claims (16)
A mold part 105 comprising a movable mold 107 in which a first molding part 111a is formed and a stationary mold 106 in which a second molding part 111b corresponding to the first molding part 111a is formed;
Is provided in the first molding portion 111a of the movable mold 107 or the second molding portion 111b of the stationary mold 106 and is provided with the mold portion 105 And a stiffener hole forming tool (120) separated from the foam resin molding (200) and separated from the foam resin molding (200) to form one or more stiffener holes (210) in the foam resin molding (200).
The stiffener hole forming tool 120,
A plate-like base 122 formed with a plurality of slots 123 on a surface contacting with the foaming resin; And
A molding pin 126 assembled at equal intervals or at equal intervals in the slot 123 and vertically connected to the base 122 and having a hole forming hole 127 for forming the stiffener hole 210 at its uppermost portion; Wherein the foam resin molding apparatus comprises:
The base 122 is formed to have a size corresponding to the molding surface of the first molding part 111a or the second molding part 111b of the mold part 105, And the foamed resin molding device is provided so as to contact the foamed resin molding machine.
Wherein a plurality of vapor transmission holes (124) are formed in the base (122) to correspond to the vapor holes (113) of the molding surface.
The height H of the forming pin 126 with respect to the surface of the base 122 is equal to the height H of the foam formed in the molding space 112 in which the first forming portion 111a and the second forming portion 111b are partitioned Is formed to be 1/3 to 1/2 of the thickness (D) of the resin molding (200).
Wherein the hole forming tool (127) is formed in a rod-like structure having a circular or triangular or more polygonal cross section.
Wherein the forming pin (126) is assembled to the slot (123) of the base (122) at different numbers and intervals according to the required strength of the foamed resin molding (200).
The movable mold 107 and the stationary mold 106 constituting the mold part 105 are formed with a steam chamber 115 and the first molding part 111a and the second molding part 111a are connected to each other through the steam chamber 115. [ The steam is supplied to the molding space 112 in which the molding part 111b is partitioned,
And a steam supply unit (150) connected to the mold unit (105) and supplying steam to the steam chamber (115).
A foaming resin supply unit 140 installed in the mold unit 105 and supplying the foamed resin to a molding space 112 for partitioning the foamed resin by the first molding unit 111a and the second molding unit 111b; And
And a cooling water supply unit (160) connected to the mold unit (105) and capable of supplying cooling water for cooling the foamed resin molding (200) to the steam chamber (115).
And a rigid stiffener (220) inserted in the stiffener hole (210) of the stiffener mounting portion (202) to reinforce the rigidity of the foamed resin molding (200).
A part of the plate-shaped transverse stiffener 230 is mounted and fixed to the stiffener mounting part 202 and the other part is formed to protrude at a predetermined height from the surface of the foamed resin to reinforce the lateral rigidity of the foamed resin- ; And
The through holes 231 are formed at predetermined intervals so as to be positioned in the same line on the respective plate-shaped transverse stiffeners 230 protruding on the surface of the foamed resin molding 200, And a rod-shaped longitudinal stiffener (232) which simultaneously passes through the through-holes (231) located on the same line and reinforces the longitudinal rigidity of the foamed resin molded product (200).
A buried stiffener 240 mounted on and fixed to the stiffener mounting portion 202 so as to be embedded in the foamed resin molding 200;
A part of the reinforcing member 242 is mounted and fixed to the stiffener mounting part 202 with the buried stiffener 240 interposed therebetween and the other part is formed to protrude from the surface of the foam resin at a predetermined height, A protruding stiffener 242 having guide holes 243 for assembly; And
And a reinforcing panel (245) slidably assembled along the guide hole (243) so as to be positioned in an assembling space where the protruding stiffener (242) on the surface of the foamed resin molded product (200) is partitioned.
Wherein the reinforcing panel (245) is a cushion panel made of a heat insulating panel made of heat insulating material or rubber or sponge.
And a finishing panel (247) covering the upper exposed surface of the reinforcing panel (245).
The first molding portion 111a of the movable mold 107 or the second molding of the stationary mold 106 is formed in a state in which the movable mold 107 and the stationary mold 106 constituting the mold portion 105 are spaced from each other, Placing a stiffener hole forming tool (120) in the portion (111b);
The movable mold 107 is moved to the stationary mold 106 side so that the two molds are combined and the molding space in which the first molding portion 111a and the second molding portion 111b are partitioned by the merging of the two molds 112) with a foaming resin;
The steam is supplied to the molding space 112 through the steam supply unit connected to the movable mold 107 and the stationary mold 106 to apply heat to the foamed resin and replace the air between the foamed resins with steam , Cooling the foamed resin molding (200) to be formed in the molding space (112) by a cooling water supply part (160) connected to the mold part (105);
Separating the foamed resin molding 200 from the molding space 112 by separating the movable mold 107 from the fixed mold 106 together with the stiffener hole forming tool 120; And
The stiffener hole forming tool 120 is separated from the foamed resin molding 200 separated from the mold and the stiffener hole 210 formed in the foamed resin molding 200 by the stiffener hole forming tool 120, And reinforcing the rigidity of the foamed resin molded product (200).
Priority Applications (1)
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KR1020150068943A KR101712173B1 (en) | 2015-05-18 | 2015-05-18 | Molding device and methods for expandable resin, foamed expandable mold using the same |
Applications Claiming Priority (1)
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KR1020150068943A KR101712173B1 (en) | 2015-05-18 | 2015-05-18 | Molding device and methods for expandable resin, foamed expandable mold using the same |
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KR20160135900A true KR20160135900A (en) | 2016-11-29 |
KR101712173B1 KR101712173B1 (en) | 2017-03-06 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101887519B1 (en) * | 2017-09-01 | 2018-08-10 | 강성복 | Insulation panel and manufacturing method of it |
WO2019223811A1 (en) * | 2018-11-15 | 2019-11-28 | Zhang Yanchen | Hot-forming cold-setting device rapid heating plate |
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JP2003040138A (en) * | 2001-07-31 | 2003-02-13 | Neoex Lab Inc | Structure of foaming and filling hollow panel and its foaming and filling tool |
JP2005035159A (en) * | 2003-07-14 | 2005-02-10 | Sekisui Chem Co Ltd | Manufacturing method for thermoplastic resin foam having recessed groove |
KR20110062963A (en) * | 2009-12-04 | 2011-06-10 | (주)엠코리아 | Foam article molding apparatus with hole processing unit |
KR20150023169A (en) * | 2013-08-23 | 2015-03-05 | 이동욱 | Molding apparatus for foamed resin, method thereof, and foamed panel produced by using the same |
KR20150023170A (en) | 2013-08-23 | 2015-03-05 | 이동욱 | Molding apparatus for foamed resin, method thereof, and foamed panel produced by using the same |
-
2015
- 2015-05-18 KR KR1020150068943A patent/KR101712173B1/en active IP Right Grant
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2003040138A (en) * | 2001-07-31 | 2003-02-13 | Neoex Lab Inc | Structure of foaming and filling hollow panel and its foaming and filling tool |
JP2005035159A (en) * | 2003-07-14 | 2005-02-10 | Sekisui Chem Co Ltd | Manufacturing method for thermoplastic resin foam having recessed groove |
KR20110062963A (en) * | 2009-12-04 | 2011-06-10 | (주)엠코리아 | Foam article molding apparatus with hole processing unit |
KR20150023169A (en) * | 2013-08-23 | 2015-03-05 | 이동욱 | Molding apparatus for foamed resin, method thereof, and foamed panel produced by using the same |
KR20150023170A (en) | 2013-08-23 | 2015-03-05 | 이동욱 | Molding apparatus for foamed resin, method thereof, and foamed panel produced by using the same |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101887519B1 (en) * | 2017-09-01 | 2018-08-10 | 강성복 | Insulation panel and manufacturing method of it |
WO2019223811A1 (en) * | 2018-11-15 | 2019-11-28 | Zhang Yanchen | Hot-forming cold-setting device rapid heating plate |
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KR101712173B1 (en) | 2017-03-06 |
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