JP2019130865A - Apparatus for molding foam-resin composite metal plate - Google Patents

Abstract

To provide an apparatus for molding a foam-resin composite metal plate, capable of enhancing filling characteristic of a foam resin in a simple structure and preventing the foam resin from leaking out between a steel material and a back-surface material.SOLUTION: An apparatus 100 for molding a foam-resin composite metal plate 20 includes: an upper mold 3 capable of coming into contact with a back-surface material 21; a lower mold 4 capable of coming into contact with a steel plate 22; and an air bag 6 applying pressure onto the upper mold 3 and the lower mold 4. The upper mold 3 is formed with at least one vent groove 31 and the inside of the vent groove 31 is provided with elastic members 9a and 9b. In a state in which the back-surface material 21 and the steel plate 22 are sandwiched between the upper mold 3 and the lower mold 4, the air in a foam resin filling space X can be flown out to the outside via the vent groove 31. In addition, between the elastic members 9a and 9b and the steel plate 22, there is provided a gap D where the back-surface material 21 can be lifted up and a foam resin H cannot leak out.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a molding apparatus for a foamed resin composite metal plate.

  A foamed resin composite metal plate in which a metal plate and a foamed resin are combined is used as a panel for building materials such as a roofing material and a wall material. As a method for producing a foamed resin composite metal plate, a steel plate and a back material are set and sandwiched in a molding apparatus consisting of a pair of upper and lower molds, and a foam resin is injected into the space between the steel material and the back material and foamed. There is a method of filling. At this time, since the foamed resin expands with foaming, in order to remove air from the inside of the foamed resin composite metal plate, an exhaust hole such as a vent hole needs to be formed between the steel material and the back surface material. . However, as shown in FIG. 7, when the foamed resin H ′ is expanded and expanded between the steel plate 122 and the back surface material 121 set in the conventional molding die 110, if the exhaust hole 133 is too wide, the foamed resin H ′ There was a risk of leaking outside. In addition, if the exhaust hole is too narrow, the internal pressure inside the foamed resin composite metal plate becomes high, so that satisfactory filling cannot be obtained.

  Here, Patent Document 1 describes a method in which a urethane raw material is injected into a mold and foamed to form a molded urethane pad having a desired shape. In this method, a vent hole penetrating to the outside is formed in a sealed mold, and a pressure regulator connected to the vent hole via a tube is provided. And the pressure inside the mold is adjusted by the pressure regulator according to the difference in capacity and shape in the mold which is different for each molded product, and the leakage of urethane raw material from the mold is prevented while improving the filling property. The

Japanese Patent No. 4899561

  However, the method shown in Patent Document 1 adjusts the pressure inside the mold on the assumption that a urethane pad that is not combined with a steel material is manufactured. On the other hand, when producing a foamed resin composite metal plate in which a foamed resin is filled between the steel material and the back surface material, air holes cannot be formed in the steel material or the back surface material. Further, if a pressure regulator as described in Patent Document 1 is connected to a gap such as a vent hole between the steel material and the back surface material, the entire configuration of the molding apparatus may be complicated.

  The present invention has been made to solve such problems, and has a simple structure that increases the filling property of the foamed resin and can prevent the foamed resin from leaking between the steel material and the back surface material. It aims at providing the shaping | molding apparatus of a metal plate.

  In order to solve the above problems, a foamed resin composite metal plate forming apparatus according to the present invention fills a foamed resin filling space formed between a steel plate, a back material in contact with the steel plate, and the steel plate and the back material. For manufacturing a foamed resin composite metal plate having a foamed resin, an upper mold capable of contacting a back surface material, a lower mold capable of contacting a steel plate, an upper mold and a lower mold A pressure part that applies pressure to the upper mold and the lower mold so that the back surface material and the steel material are sandwiched between the mold and the upper mold, and at least one ventilation groove is formed in the upper mold, An elastic member is provided inside the ventilation groove, and the air in the foamed resin filling space can flow out to the outside through the ventilation groove when the back material and the steel plate are sandwiched between the upper mold and the lower mold. And the back material can be lifted between the elastic member and the steel plate. Leak is not possible clearance of the foamed resin are provided.

  The elastic member of the foamed resin composite metal plate forming apparatus according to the present invention may have a circular cross section.

  The elastic member may be a cylindrical rubber member, and the upper mold may be formed with a fitting groove into which the elastic member is fitted, and the fitting groove may be formed to intersect with the ventilation groove.

  According to the foamed resin composite metal plate forming apparatus of the present invention, it is possible to prevent leakage of the foamed resin from between the steel material and the back surface material with a simple structure.

It is a disassembled perspective view which shows the steel plate and back surface material which are pinched | interposed between an upper metal mold | die and a lower metal mold | die, and the upper metal mold | die and a lower metal mold | die of the shaping | molding apparatus of the foamed resin composite metal plate concerning embodiment of this invention. It is a top view which shows the shape of the lower surface of the upper metal mold | die of the shaping | molding apparatus shown in FIG. It is a figure which shows one process of the manufacturing method of the foaming resin composite metal plate performed using the shaping | molding apparatus shown in FIG. 1, Specifically, after inject | pouring foaming resin into the recessed part of a steel plate, back material is put on steel materials. It is a figure which shows the process of mounting. It is a figure which shows 1 process of the manufacturing method of the foamed resin composite metal plate performed using the shaping | molding apparatus shown in FIG. 1, Specifically, after the process shown in FIG. 3, between an upper metal mold | die and a lower metal mold | die. It is a figure which shows the process of sandwiching a steel plate and a back material and foaming a foamed resin. (A)-(c) is a figure which shows typically the mode of filling with the foamed resin of the foamed resin composite metal plate in the vicinity of the ventilation groove | channel of the shaping | molding apparatus shown in FIG. It is a figure which shows typically a mode that the filling of the foamed resin of the foamed resin composite metal plate installed in the shaping | molding apparatus shown in FIG. 1 was completed. It is a figure which shows typically the mode of the leakage of the foamed resin of the foamed resin composite metal plate installed in the shaping | molding apparatus which concerns on the conventional example.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, a molding apparatus 100 for manufacturing a foamed resin composite metal plate 20 includes an upper mold 3 and a lower mold 4 that face each other in the vertical direction. A mold frame 41 that is a substantially rectangular frame-shaped portion is provided on the upper surface side of the lower mold 4. A pair of airbags 6 made of a rubber material or a fiber material is provided on the lower surface side of the lower mold 4. Further, between the lower mold 4 and the upper mold 3, the back material 21 and the steel plate 22 of the foamed resin composite metal plate 20 are set. That is, the upper die 3 and the lower die 4 of the molding apparatus 100 can sandwich the back material 21 and the steel plate 22 therebetween, the upper die 3 contacts the back material 21, and the lower die 4 is a steel plate. 22 abuts. Further, the steel plate 22 is formed with a continuous side wall portion 23 by press working such as drawing or overhanging, and the inside of the region surrounded by the side wall portion 23 constitutes a concave portion 24. Further, a steel peripheral edge 27 is formed around the recess 24. The side wall 23 of the recess 24 of the steel plate 22 is formed in a shape that can be fitted inside the mold frame 41 of the lower mold 4. Then, the back surface material 21 is placed on the upper surface of the steel plate 22 so as to cover and close the concave portion 24. The back material 21 placed on the steel plate 22 contacts the steel material peripheral edge 27 of the steel plate 22.
In addition, the airbag 6 comprises a pressurization part.

  Here, the material of the back material 21 preferably includes at least one of aluminum foil, aluminum vapor-deposited paper, aluminum hydroxide paper, calcium carbonate paper, non-woven fabric, woven fabric, glass fiber non-woven fabric, metal-deposited non-woven fabric, and resin film. Shall be.

  The steel plate 22 is, for example, a hot-dip Zn-based plated steel plate, a hot-dip Al-plated steel plate, a hot-dip Zn-plated stainless steel plate, a hot-dip Al-plated stainless steel plate, a stainless steel plate, an Al plate, a Ti plate, a paint-melted Zn-based plated steel plate, It is assumed that it is an Al-plated steel plate, a coated hot-dip Zn-based plated stainless steel plate, a painted hot-plated Al-plated stainless steel plate, a painted stainless steel plate, a painted Al plate, or a painted Ti plate.

  As shown in FIG. 2, a plurality of ventilation grooves 31 are formed on the lower surface side of the upper mold 3. Three of these ventilation grooves 31 are provided for each side of the upper mold 3 so as to be arranged at regular intervals along the outer periphery. Further, on the lower surface side of the upper mold 3, fitting grooves 32 a and 32 b extending so as to intersect with the ventilation groove 31 are formed. Each of the pair of fitting grooves 32 a extends along the long side of the upper mold 3 and is orthogonal to the three ventilation grooves 31 provided on the long side of the upper mold 3. Similarly, each of the pair of fitting grooves 32 b extends along the short side of the upper mold 3 and is orthogonal to the three ventilation grooves 31 provided on the short side of the upper mold 3. An elastic member 9a is fitted in each of the fitting grooves 32a along the long side of the upper mold 3, and an elastic member 9b is fitted in each of the fitting grooves 32b along the short side of the upper mold 3. Is done. The elastic members 9a and 9b are substantially cylindrical rubber members and have a substantially circular cross section. Here, each of the elastic members 9 a and 9 b extends along the fitting grooves 32 a and 32 b and is provided so as to cross the ventilation groove 31. That is, the elastic members 9a and 9b are provided in a part of the inside of each ventilation groove 31.

Next, the filling method of the foamed resin of the foamed resin composite metal plate 20 will be described with reference to FIGS. 3 to 6 schematically show only one vent groove 31 and one elastic member 9a, the other vent grooves 31 and the elastic members 9a and 9b have the same structure.
First, after the upper mold 3 and the lower mold 4 are heated with warm water, the steel plate 22 is placed on the lower mold 4 as shown in FIG. 3, and the raw material of the foamed resin H is injected into the recess 24 of the steel plate 22. And the back surface material 21 is mounted so that the upper part of the recessed part 24 may be covered. Here, a foamed resin filling space X filled with the foamed resin H is formed between the back material 21 and the recess 24 of the steel plate 22.
The foamed resin H is a core material of the foamed resin composite metal plate 20, and isocyanurate, urethane, phenol resin, or the like is used as the material.

  Then, as shown in FIG. 4, air is supplied to the airbag 6, and the lower mold 4 is pushed upward to sandwich the back material 21 and the steel plate 22 with the upper mold 3. The upper mold 3 is assumed to be fixed in position. That is, the airbag 6 applies pressure to the upper mold 3 and the lower mold 4 so that the back material 21 and the steel plate 22 are sandwiched between the upper mold 3 and the lower mold 4. Further, the foamed resin H expands and expands inside the recess 24 of the steel plate 22. And the internal pressure of the foamed resin filling space X increases with the foaming of the foamed resin H. Further, a gap D is provided between the elastic member 9 a and the steel plate 22. Here, the gap D is an interval that is wide enough to allow part of the back surface material 21 to be lifted. Specifically, as shown in the change from (a) to (b) shown in FIG. 5, the inner pressure of the foamed resin filling space X increases with the foaming of the foamed resin H, so that the inner side of the ventilation groove 31. As a result, a part of the back surface material 21 is lifted and comes into contact with the elastic member 9a. In the state shown in FIG. 5B, the air in the foamed resin filling space X passes between the back material 21 and the steel plate 22 and is discharged to the outside. That is, in the state where the foamed resin composite metal plate 20 is sandwiched between the upper mold 3 and the lower mold 4, the foamed resin filling space X can communicate with the outside through the ventilation groove 31. The air in the resin filling space X can flow out.

  Next, the filling of the foamed resin H in the foamed resin filling space X proceeds, and as shown in FIG. 5C, when the expanded foamed resin H pushes up the back surface material 21 and flows into the ventilation groove 31, When the foamed resin H presses the elastic member 9a, a resistance force is generated in the elastic member 9a. Therefore, the foamed resin H cannot pass through the gap D between the elastic member 9a and the steel plate 22 and is dammed up. That is, the gap D is wide enough that the back material 21 can be lifted and the foamed resin H cannot leak. The interval of the gap D can be appropriately set according to the type of the foamed resin H, the type of the material of the elastic members 9a and 9b, the cross-sectional size of the elastic members 9a and 9b, and the like.

  As described above, in the molding apparatus 100 according to this embodiment, the elastic members 9 a and 9 b and the steel plate 22 are in a state where the back material 21 and the steel plate 22 are sandwiched between the upper die 3 and the lower die 4. A gap D is provided between which the back material 21 can be lifted and the foamed resin H cannot leak. Therefore, the air inside the foamed resin filling space X can be exhausted with a simple structure to prevent an increase in internal pressure, and good filling properties of the foamed resin H can be obtained, and the outside of the foamed resin H can be obtained. Leakage is prevented.

  The elastic members 9a and 9b are substantially columnar rubber members and have a circular cross section. For this reason, a uniform resistance can be exerted on the foamed resin H that is about to flow into the gap D, and leakage of the foamed resin H to the outside can be more effectively prevented.

  Further, the upper mold 3 is provided with fitting grooves 32 a and 32 b into which the elastic members 9 a and 9 b are fitted, and the fitting grooves 32 a and 32 b are formed so as to intersect with the ventilation groove 31. Accordingly, the elastic members 9a and 9b are provided so as to cross the ventilation groove 31, and the elastic members 9a and 9b are provided in a part of the inside of each ventilation groove 31. Can be ensured. Moreover, since each elastic member 9a, 9b is provided corresponding to the some ventilation groove | channel 31 along fitting groove 32a, 32b, the number of parts of the shaping | molding apparatus 100 can be restrained small.

One elastic member may be provided for each ventilation groove 31. Further, an elastic member may be fitted into each of the ventilation grooves 31 without forming the fitting grooves 32 a and 32 b in the upper mold 3.
Further, the pressurizing unit that applies pressure to the lower mold 4 and the upper mold 3 is not limited to the airbag 6 and may be a hydraulic type.

  In the embodiment, three ventilation grooves 31 are provided for each side of the upper mold 3, but the present invention is not limited to this. By appropriately changing the number of ventilation grooves 31 according to the size of the upper mold 3, the filling property of the foamed resin H can be more effectively improved.

  3 Upper mold, 4 Lower mold, 6 Air bag (Pressurizing part), 9a, 9b Elastic member, 21 Back material, 22 Steel plate, 31 Ventilation groove, 32a, 32b Fitting groove, 100 Molding device, D gap, H Foamed resin, X Foamed resin filled space.

Claims (3)

A molding apparatus for manufacturing a foamed resin composite metal plate having a steel plate, a back material in contact with the steel plate, and a foamed resin filled in a foamed resin filling space formed between the steel plate and the back material. There,
An upper mold capable of contacting the back material;
A lower mold capable of contacting the steel plate;
A pressurizing unit that applies pressure to the upper mold and the lower mold so that the back material and the steel plate are sandwiched between the upper mold and the lower mold,
At least one ventilation groove is formed in the upper mold, and an elastic member is provided inside the ventilation groove,
In a state where the back material and the steel plate are sandwiched between the upper mold and the lower mold, the air in the foamed resin filling space can flow out to the outside through the ventilation groove, and An apparatus for forming a foamed resin composite metal plate, wherein a gap is provided between the elastic member and the steel plate so that the back material can be lifted and the foamed resin cannot leak out.   The said elastic member is a shaping | molding apparatus of the foamed resin composite metal plate of Claim 1 which has a circular shaped cross section. The elastic member is a cylindrical rubber member,
The upper mold is formed with a fitting groove into which the elastic member is fitted,
The said fitting groove is a shaping | molding apparatus of the foamed resin composite metal plate of Claim 2 formed crossing the said ventilation groove.

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