JP4169424B2 - Mold for foamed resin molding - Google Patents

Description

[0001]
【Technical field】
  The present inventionThermoplastic foamed resin molding or gold for molding thermoplastic foamed resin for molding a thermoplastic foamed resin composite molded article in which a surface material or a reinforcing material used for an insulation panel for buildings is arrangedTo moldRelated.
[0002]
[Prior art]
Conventionally, as a method for molding a thermoplastic foamed resin molded article, for example, there is one disclosed in Japanese Patent Application Laid-Open No. 8-90580.
In the above molding method, first, water vapor is supplied for a predetermined time in the longitudinal direction of the molding chamber from the steam supply portion formed on at least one side surface in the molding chamber of the mold toward the steam suction portion molded on the other side surface. Shed. Next, the previous steam supply section is switched to the steam suction section, and the previous steam suction section is switched to the steam supply section so that the steam flows for a predetermined time. By repeating this switching step a predetermined number of times, the foamed resin particles filled in the molding chamber are foamed, and the foamed resin material is heated and fused.
This is cooled and then demolded to obtain a foamed resin molded body.
[0003]
[Problems to be solved]
However, in the above conventional molding method, it is possible to mold a molded body made of only a thermoplastic foamed resin, but it is arranged at the end of the surface material or the molded body, or the reinforcing material extends over the entire thickness of the molded body. When molding the arranged composite foamed resin molding, there are the following problems.
[0004]
That is, when the foamed resin particles are heated as described above, the steam does not sufficiently flow from the steam supply section to the steam suction section. For this reason, the foamed resin particles are not sufficiently foamed, and the foamed resin particles are not sufficiently fused even after foaming, and a foamed molded article having sufficient strength cannot be obtained.
[0005]
In addition, when a material with poor vapor permeability, such as a steel plate or a wood plate, is disposed on the front and back of the plane side, it is necessary to supply the steam from one opposing side and suck the vapor from the other side. That is, heat molding is performed by flowing steam in the longitudinal direction of the molding chamber. In this case, since the foamed resin starts to be heated and fused rapidly from a portion close to the steam supply section, this causes a part of the steam flow to be blocked. For this reason, it is difficult for the steam to sufficiently flow to the steam suction side, and there is also a problem that the fusion of the center portion of the foamed resin molded body is deteriorated.
[0006]
  The present invention has been made in view of such conventional problems, and even when the surface material or the reinforcing material is disposed on a part of the foamed resin molded body, the foamed resin is sufficiently heated and fused, Gold for foamed resin molding that can mold high foamed resin moldingsMoldIt is to provide.
[0007]
[Means for solving problems]
  The invention according to claim 1 includes a molding chamber and a molding chamber.Only on the bottomA mold for foamed resin molding having a chamber disposed therein,
  Above chamberーDivided into multiple compartments,
  AlsoEach compartment has a communication hole communicating with the molding chamber, and each compartment is connected to a steam supply pipe and an exhaust pipe.
[0008]
  The most notable aspect of the present invention is that the chamberIs arranged only on the bottom of the molding chamberThe compartments are partitioned into a plurality of compartments, each compartment has a communication hole communicating with the molding chamber, and each compartment is connected to a steam supply pipe and an exhaust pipe.
  In other words, each compartment has both functions of supplying steam and exhausting the gas in the molding chamber, and in some cases performs the former function and in other cases performs the latter function (see the molding method described later). .
[0009]
  The mold is the molding chamberBottomMultiple chambers with multiple compartmentsHaveThe The partitioning method is preferably an equal interval of 300 mm to 1000 mm. If it is 300 mm or less, the number of partitions increases and the equipment cost increases. On the other hand, if it is set to 1000 mm or more, each of the compartments becomes too large, and it becomes difficult to uniformly supply and exhaust the steam to the foamed resin particles in the molding chamber, so that a good foamed resin molded product cannot be obtained.
  The number of compartments may be odd or even.
  Moreover, as said vapor | steam, the water vapor | steam of 105 to 165 degreeC is used, for example.
[0010]
Next, the effects of the present invention will be described.
The chamber in the mold is partitioned into a plurality of compartments. Each compartment is connected to a steam supply pipe and an exhaust pipe.
Therefore, it is also possible to supply steam from a desired compartment to the molding chamber and exhaust from other desired compartments. It is also possible to reverse the steam supply direction and the exhaust direction in the middle.
[0011]
Therefore, the foamed resin particles can be heated by supplying and exhausting steam from a desired position in accordance with the shape of the foamed resin molded body. In addition, when molding a foamed resin composite molded body that is molded together with the surface material and the reinforcing material, the foam supply can be efficiently performed by changing the position and direction of the steam supply and exhaust according to the arrangement of the surface material and the reinforcing material. The resin particles can be heated.
[0012]
  For example, in the case where a material with poor vapor permeability is placed on the front and back of the plane side, for example, a steel plate or wood boardSuitableIt is also possible to supply steam from a plurality of appropriate locations and suck the steam from the other side. Then, after a certain period of time, the branch chamber that has been supplying steam can be switched to exhaust, and the branch chamber that has been exhausted can be switched to steam supply.
  Thereby, a foamed resin can be heat-fused uniformly uniformly.
  Therefore, the foamed resin can be sufficiently fused to obtain a foamed molded article having sufficient strength.
  Further, since the chamber is provided only on the bottom surface of the molding chamber, the moisture in the foamed molded product can be reduced as described later.
[0013]
  As described above, according to the present invention, even when the surface material or the reinforcing material is disposed in a part of the foamed resin molded body, the foamed resin is sufficiently heated and fused, and the strength is increased.ButHighAnd low moisture contentProvided a mold for foamed resin molding that can mold a foamed resin molded bodybe able to.
[0014]
In the present invention,The mold has a chamber only on the bottom surface of the molding chamber, and the chamberpluralDivided into compartmentsThe
  AndThe steam is supplied from the bottom of the molding chamber, exhausted, and the foamed resin particles are heated.The
bottomSince the exhaust is performed from the surface, the moisture of the vapor condensed in the molding chamber can be efficiently discharged out of the molding chamber. Therefore, the water | moisture content in the obtained foaming molding can be decreased.
[0015]
  Next, the claim2Invention described inIs,A mold for foamed resin molding having a molding chamber and a chamber disposed in part or all of the periphery of the molding chamber,
At least one of the chambers is partitioned into a plurality of compartments,
Each compartment has a communication hole communicating with the molding chamber, and each compartment is connected to a steam supply pipe and an exhaust pipe.
The mold is formed of a concave mold and a flat mold, or a concave mold and a convex mold, and the chamber provided in the concave mold is partitioned into a plurality of the compartments by a partition perpendicular to the bottom surface of the molding chamber. The chamber provided in the flat mold or the convex mold does not have the communication hole, and is in the mold for foaming resin molding.
  In this case, the foamed resin particles can be heated directly through steam from the communicating holes on the bottom and side surfaces of the molding chamber, and the foamed resin particles can be indirectly heated from the top surface.
Further, at least one of the chambers in the mold is partitioned into a plurality of compartments. Each compartment is connected to a steam supply pipe and an exhaust pipe.
Therefore, it is also possible to supply steam from the desired compartment to the molding chamber and exhaust from other desired compartments. It is also possible to reverse the steam supply direction and the exhaust direction in the middle.
Therefore, the foamed resin particles can be heated by supplying and exhausting steam from a desired position according to the shape of the foamed resin molded body and the like. In addition, when molding a foamed resin composite molded body that is molded together with the surface material and the reinforcing material, it is possible to efficiently foam by changing the position and direction of the steam supply and exhaust according to the arrangement of the surface material and the reinforcing material. The resin particles can be heated.
For example, in the case where a material with poor vapor permeability is disposed on the front and back of the plane side, for example, a steel plate or a wooden plate, the vapor can be supplied from a plurality of appropriate locations on the side surface and the vapor can be sucked from the other side surface. . Then, after a certain period of time, the branch chamber that has been supplying steam can be switched to exhaust, and the branch chamber that has been exhausted can be switched to steam supply.
Thereby, a foamed resin can be heat-fused uniformly uniformly.
Therefore, the foamed resin can be sufficiently fused to obtain a foamed molded article having sufficient strength.
As described above, according to the present invention, even when the surface material or the reinforcing material is disposed in a part of the foamed resin molded body, the foamed resin is sufficiently heat-sealed to form a high-strength foamed resin molded body. It is possible to provide a mold for forming a foamed resin.
[0016]
  next,UpThe metal mold includes two concave molds, and a chamber provided in the concave mold is partitioned into a plurality of the compartments by a partition perpendicular to the bottom surface of the molding chamber.Can be.
  In this case, the foamed resin particles can be heated by supplying and exhausting steam from the top, bottom, and side surfaces of the molding chamber.
[0017]
  next,UpThe metal mold includes a concave mold and a flat mold, or a concave mold and a convex mold, and the chamber provided in the concave mold is partitioned into a portion that contacts the bottom surface and a portion that contacts the side surface of the molding chamber, and further contacts the side surface. The part is partitioned into a plurality of the compartments by a partition perpendicular to the bottom surface.Can be.
  In this case, the foamed resin particles can be directly heated from the upper surface and the lower surface, and the foamed resin particles can be indirectly heated from the upper surface and the lower surface by supplying and exhausting steam only from the side surface of the molding chamber.
[0018]
  next,MoneyA method of molding a foamed resin molding using a mold,
  The mold for foamed resin molding is a mold for foamed resin molding having a molding chamber and a chamber disposed in a part or all of the periphery of the molding chamber,
  At least one of the chambers is partitioned into a plurality of compartments,
  Each compartment has a communication hole communicating with the molding chamber, and each compartment is connected to a steam supply pipe and an exhaust pipe.
  The molding method of the foamed resin molded body includes a filling step of filling the molding chamber of the mold with foamed resin particles,
  A heating and foaming step of heating the foamed resin particles by supplying steam to the molding chamber;
  A cooling step for cooling the foamed resin molded body,
  In the heating and foaming step, steam is supplied from one or more predetermined first compartments out of the plurality of compartments into the molding chamber through the communication hole, and from the second compartment other than the first compartment, A first heating step of discharging the molding chamber gas through the communication hole;
  Contrary to the first heating step, the foamed resin molded body has a second heating step of supplying steam from the second compartment, while discharging a gas in the molding chamber from the first compartment. There are molding methods.
[0019]
  In this wayIt should be noted that the heating and foaming step has the first heating step and the second heating step as described above.
[0020]
  the aboveIn the molding method, steam is supplied from the first compartment to the molding chamber and exhausted from the second compartment in the first heating step. In the second heating step, the steam supply direction and the exhaust direction are reversed from those in the first heating step.
[0021]
Therefore, depending on the shape of the foamed resin molding, etc., it is determined which of the first compartment and the second compartment to perform the steam supply or exhaust function, and by supplying and exhausting steam. , Steam can be efficiently supplied to the entire molding chamber. Therefore, the foamed resin particles can be efficiently heated. In addition, when molding a foamed resin composite molded body that is molded together with the surface material and the reinforcing material, the foam supply can be efficiently performed by changing the position and direction of the steam supply and exhaust according to the arrangement of the surface material and the reinforcing material. The resin particles can be heated.
[0022]
For example, when a material with poor vapor permeability, such as a steel plate or a wood board, is disposed on the front and back of the plane side, steam is supplied from appropriate first compartments on the side surface and the other second compartments on the side surface. Exhaust from. After a certain time, the first compartment is switched to exhaust and the second compartment is switched to steam supply.
Thereby, the foamed resin can be heated and fused uniformly throughout.
Therefore, the foamed resin can be sufficiently fused to obtain a foamed molded article having sufficient strength.
[0023]
Above methodAccording to the above, even when the surface material or the reinforcing material is disposed on a part of the foamed resin molded body, the foamed resin can be sufficiently heat-fused to form a foamed resin molded body having high strength. A resin molding method can be provided.
[0024]
  next,UpThe first compartment and the second compartment are preferably arranged alternately.
  Thus, in the heating step, the vapor passes through the molding chamber more evenly, so that the foamed resin particles in the molding chamber can be heated and fused uniformly.
  Therefore, it is possible to mold a foamed resin molded body having higher strength.
[0025]
  next,UpIn the heating and foaming step, the compartment for discharging the molding chamber gas is preferably sucked under reduced pressure.
  Thereby, the gas in the molding chamber can be exhausted more efficiently, and the thermal fusion of the foamed resin particles can be performed more efficiently. In addition, it is possible to prevent excess gas from remaining in the foamed resin molded body.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1
A mold for foamed resin molding according to an embodiment of the present invention and a molding method using the same will be described with reference to FIGS.
The mold 1 for foaming resin molding of this example has a molding chamber 2 and a chamber 3 arranged around the molding chamber as shown in FIGS.
The chamber 3 is partitioned into a plurality of compartments 31. Each compartment 31 has a communication hole 319 (FIG. 3) communicating with the molding chamber 2, and each compartment 31 is connected to a steam supply pipe 41 and an exhaust pipe 42.
[0027]
The mold 1 is installed in a molding machine 10 as shown in FIG.
Foamed resin molding can be performed using a general polystyrene foam molding machine, which uses either a concave mold and a flat mold, a horizontal mold machine that opens and closes a concave mold and a convex mold, and a vertical mold machine that opens and closes vertically. Also good.
For example, in the case of composite molding in which a surface material and a reinforcing material are mounted in a mold and molded integrally, a vertical molding machine is preferable to simplify the process. This is because a horizontal molding machine requires a mounting and fixing device for a composite surface material and a reinforcing material, which increases costs.
In this example, the vertical molding machine 10 shown in FIG. 1 was used.
[0028]
The structure of the mold 1 attached to the molding machine 10 will be described with reference to FIGS.
As shown in FIG. 2A, the mold 1 has a chamber 3 on the bottom surface 21 and side surface 22 of the molding chamber 2 and a chamber 30 on the top surface 23.
As shown in FIG. 2A, the chamber 3 on the bottom surface 21 and the side surface 22 of the molding chamber 2 is partitioned into six compartments 31. The chamber 30 is not partitioned into compartments.
[0029]
As shown in FIG. 2, each of the compartments 31 has first compartments 311 and second compartments 312 arranged alternately from the end, and the first compartments 311 and the second compartments 312 are respectively connected to the first pipe 43 and the second compartment 312. They are connected by a second pipe 44 (FIG. 1).
The first pipe 43 and the second pipe 44 are connected to the steam supply pipe 41 and the exhaust pipe 42 via valves 490 to 493, respectively.
[0030]
  As shown in FIG. 3, many communication holes 319 are formed on the molding chamber 2 side in the compartment 31. In addition, on the molding chamber 2 side of the other chamber 30, CommunicatingThere is no through holeYes.
[0031]
The filling gun 15 for filling the foamed resin particles into the molding chamber 2 and the release pin 16 for releasing the foamed resin molded body are formed on the bottom surface 21 of the molding chamber 2 of the mold 1 as shown in FIG. Arranged as shown in FIG.
[0032]
Next, a molding method using the foamed resin molding die 1 will be described with reference to FIGS.
That is, the molding method of the foamed resin molded body includes a filling step of filling the molding chamber 2 of the mold 1 with the foamed resin particles, and a heating foaming step of heating the foamed resin particles by supplying water vapor to the molding chamber 2. And a cooling step for cooling the foamed resin molded body.
[0033]
Moreover, the said heating foaming process consists of the 1st heating process and the 2nd heating process which are shown next.
In the first heating step, as shown in FIGS. 3 and 4A, steam 61 is supplied from the first compartment 311 into the molding chamber 2 through the communication hole 319, and from the second compartment 312 the above-mentioned The molding chamber gas 62 is discharged through the communication hole 319.
[0034]
On the other hand, in the second heating step, as shown in FIG. 4B, in contrast to the first heating step, the steam 61 is supplied from the second compartment 312 and the molding chamber gas is supplied from the first compartment 311. 62 is discharged.
In FIG. 1, the flow of steam and exhaust in the first heating step is indicated by solid arrows, and the same flow in the second heating step is indicated by dotted arrows.
[0035]
The specific molding method is shown below.
First, in the molding machine 10 of FIG. 1, the flat mold 11 is lowered to the concave mold 12 by the cylinder 14 and clamped and fixed with the side lock pins 17. Next, pre-foamed small-diameter foamed resin particles are filled from a filling gun 15 attached to the bottom surface of the concave mold 12.
When molding the foamed resin composite molded body 5 as shown in FIG. 6, the surface material 51 and the reinforcing material 52 shown in FIG. 6 are placed in the molding chamber 2 of the mold 1 and clamped when the mold is opened. .
[0036]
As for the filling method, air filling or vacuum filling can be used. In the case of this example, since there are few communication holes 319 of the chamber 3, the method of repeating vacuum filling several times is preferable. In such cases, filling with air may cause filling failure.
[0037]
After the completion of filling, a step of reducing the internal pressure in the chamber 3 and the molding chamber 2 is performed. Degree of vacuum is -0.5 to -0.8 kg / cm²Is preferred. The depressurization step may be omitted depending on the size and capacity of the foamed resin molded body and the capacity of the vacuum suction pump.
Next, as shown in FIG. 4 (A), the heating method is to supply steam 61 to the three first compartments 311 in the chamber 3 of the concave mold 12 through the steam supply pipe 41 and the first pipe 43, while on the other hand. A first heating step is performed in which the molding chamber gas 62 is vacuum sucked from the three second compartments 312 through the second pipe 44 and the exhaust pipe 42 (solid line arrows in FIG. 1).
[0038]
Next, a second heating process is performed in which the steam supply side and the vacuum suction side in the first heating process are switched. That is, steam 61 is supplied from the steam supply pipe 41 and the second pipe 44 to the second compartment 312 and exhausted from the first compartment 311 through the first pipe 43 and the exhaust pipe 42 (dotted arrow in FIG. 1).
Next, as the main heating step, steam 61 is supplied from all of the first compartment 311 and the second compartment 312.
Note that after the first heating step is completed, a step of vacuum suction from all the compartments 31 of the chamber 3 may be taken, and the internal pressure of the chamber 3 may be further increased to a second degree of depressurization.
[0039]
At the same time, in the flat mold 11, steam 61 is supplied to the chamber 30 to heat the mold forming surface and perform indirect heating.
After foaming is sufficiently performed, the valves 495 and 497 are opened, and an exhaust process for exhausting the chamber 30 and a water cooling process for spraying cooling water on the concave mold 12 and the flat mold 11 are performed. Next, a discharge process for discharging the cooling water from the chamber 30 is performed, and finally a cooling process by vacuum suction is performed.
[0040]
For example, the filling step of the foamed resin particles is 30 to 90 seconds, the decompression step is 5 to 60 seconds, the first heating step is 30 to 120 seconds, the second heating step is 30 to 120 seconds, and the main heating step is 30 to 60 seconds. The foamed resin molded article can be molded by setting the second, the exhausting process to 3 to 10 seconds, the water cooling process to 3 to 20 seconds, and the cooling process to 60 to 300 seconds.
[0041]
4A and 4B show the flow of the steam 61 during heating in the first heating process and the second heating process, respectively.
The steam 61 in the first heating process is supplied from the first compartment 311 into the molding chamber 2 and is vacuumed into the second compartment 312. At this time, the steam 61 flows from the first compartment 311 on the bottom surface 21 of the molding chamber 2 to the second compartment 312 on the bottom surface 21, and from the first compartment 311 on the bottom surface 21 to the second compartment 312 on the side surface 22. Further, the steam 61 flows from the first compartment 311 on the side surface 22 to the second compartment 312 on the bottom surface 21 and from the first compartment 311 on the side surface 22 to the second compartment 312 on the side surface 22. Thereby, the molding chamber gas 62 is discharged between the foamed resin particles and the steam 61 is supplied, so that the foamed resin particles can be efficiently heat-sealed.
[0042]
The flow of steam in the second heating process is a process that flows in the first compartment 311 and the second compartment 312 in reverse to the steam flow in the first heating process (FIG. 4B). The pressure of water vapor during the first heating process and the second heating process is 0.3 kg / cm.²~ 0.8kg / cm²The heating time is preferably 30 seconds to 120 seconds. It is necessary to adjust the heating pressure and time according to the pipe size and cavity volume.
Moreover, the initial pressure reduction degree at that time is the chamber pressure −0.5 kg / cm.²~ -0.8kg / cm²It is.
[0043]
Next, the foamed resin composite molded body 5 will be described with reference to FIGS.
In molding, as shown in FIG. 6, the surface material 51 and the reinforcing material 52 are placed in the mold 1 and clamped, and the foamed resin particles are filled between the surface material 51 and the surface material 51 as described above. Then, by heating and cooling, the foamed resin molded body 50 as the main body can be integrally molded integrally with the surface material 51 and the reinforcing material 52.
[0044]
As examples of the configuration of the surface material 51 and the reinforcing material 52 of the foamed resin composite molded body 5, those having shapes as shown in FIGS. 7A to 7D can be integrally molded.
In the foamed resin composite molded body 501 shown in FIG. 7A, the surface material 51 is disposed on one of the surfaces of the foamed resin molded body 50, and the total thickness of the foamed resin molded body 50 is provided at both ends and the center in the width direction. The reinforcing material 52 is arranged over the entire area and integrally molded.
[0045]
A foamed resin composite molded body 502 shown in FIG. 7B is obtained by integrally molding the surface material 51 on both surfaces of the foamed resin molded body 50.
In the foamed resin composite molded body 503 shown in FIG. 7C, the surface material 51 is disposed on both surfaces of the foamed resin molded body 50, and at the both ends and the center in the width direction, over the entire thickness of the foamed resin molded body 50. The reinforcing material 52 is disposed and integrally molded.
[0046]
  The foamed resin composite molded body 5 shown in FIG. 7 (D) has the surface material 51 disposed on both surfaces of the foamed resin molded body 50 and has the entire thickness of the foamed resin molded body 50 at both ends and the center in the width direction. The reinforcing material 52 is arranged over substantially half and is integrally formed.
  This foamed resin composite molded body 5 isthe aboveIt has the same structure as the foamed resin composite molded body 5 (FIG. 6).
[0047]
Further, as shown in FIG. 7 (E), a heat insulating material 53 is disposed in the mold 1 together with the surface material 51 and the reinforcing material 52, and a foamed resin molded body 504 in which these and the foamed resin molded body 50 are integrally molded is molded. You can also That is, in the foamed resin composite molded body 504, the surface material 51 is disposed on both surfaces of the foamed resin molded body 50, and the reinforcing material 52 is provided over the entire thickness of the foamed resin molded body 50 at both ends and the center in the width direction. Further, a heat insulating material 53 is arranged on the back side of one surface material 51 and integrally molded.
[0048]
In the foamed resin composite molded bodies 502, 503, 5, and 504, at least the surface material 51 facing the communication hole 319 is provided so that the communication hole 319 of the mold 1 is not completely closed during molding. Requires an opening for steam supply and vacuum suction.
[0049]
As the surface material 51 and the reinforcing material 52, a wood board such as plywood, a wood fiber board, a resin board, a metal board, a ceramic board, and an inorganic board can be used. As for those having poor adhesion between the foamed resin molded body 50 and the surface material 51 and the reinforcing material 52, those obtained by applying an adhesive to the surface material 51 and the reinforcing material 52 in advance and drying can be used.
[0050]
By applying the adhesive to the surface material 51 and the reinforcing material 52, the adhesive force with the foamed resin particles can be improved. For those having no adhesive force, a gap is generated between the surface material 51 and the reinforcing material 52 and the foamed resin molded body 50 due to dimensional shrinkage of the resin itself and thermal expansion and contraction after the foamed resin molded body 5 is molded. The performance as the molded body 5 is hardly exhibited.
[0051]
As the heat insulating material 53, a fibrous heat insulating material, a urethane heat insulating material, a polyethylene heat insulating material, a polypropylene heat insulating material, a polystyrene heat insulating material, an inorganic heat insulating material, or the like can be used.
[0052]
In addition, the above adhesives include solvent-based adhesives such as epoxy-based, urethane-based, vinyl acetate-based, recycled rubber-based and synthetic rubber-based adhesives, and water-dispersed adhesives such as acrylic-based, vinyl acetate-based, SBR-based and EVA-based adhesives. Etc. can be used. The coating amount is 40 to 300 g / m²Is preferred.
[0053]
For example, pre-foamed resin particles are used as the foamed resin particles to be filled in the molding chamber. As such pre-expanded resin particles, thermoplastic pre-expanded resin particles such as polystyrene, polypropylene and polyethylene can be used. As the expansion ratio of the pre-expanded resin particles to be placed in the molding chamber, it is preferable to use a 30 to 80-fold product.
[0054]
In FIG. 1, reference numeral 18 denotes a tie rod for smoothly operating the vertical movement of the flat 11. Reference numeral 101 denotes an upper mold attachment frame, and reference numeral 102 denotes a lower mold attachment frame.
[0055]
Next, the effect of this example will be described.
In the molding method, in the first heating step, steam 61 is supplied from the first compartment 311 to the molding chamber 2 and exhausted from the second compartment 312 in parallel with this (FIG. 1, FIG. 4A). )). In the second heating step, the supply direction and the exhaust direction of the steam 61 are reversed from those in the first heating step (FIG. 4B).
[0056]
Therefore, the steam 61 can be efficiently supplied to the entire molding chamber 2.
Therefore, the foamed resin particles can be efficiently heated. In addition, as shown in FIG. 6, when molding the foamed resin composite molded body 5 that is molded together with the surface material 51 and the reinforcing material 52, the positions of steam supply and exhaust are determined according to the arrangement of the surface material 51 and the reinforcing material 52. By changing the direction, the foamed resin particles can be efficiently heated.
[0057]
That is, even if the surface material 51 with poor vapor permeability is arranged on the front and back of the plane side, the vapor 61 is supplied from the appropriate first compartments 311 on the side surface 22 and the other second compartments 312 on the side surface 22. Exhaust from. After a certain time, the first compartment 311 is switched to exhaust, and the second compartment 312 is switched to steam supply.
Thereby, the foamed resin can be heated and fused uniformly throughout.
Therefore, the foamed resin can be sufficiently fused to obtain a foamed molded article having sufficient strength.
[0058]
As described above, according to this example, even when the surface material or the reinforcing material is disposed on a part of the foamed resin molded body, the foamed resin is sufficiently heated and fused to form a foamed resin molded body having high strength. It is possible to provide a mold for molding and a method for molding a foamed resin.
[0059]
Embodiment 2
  As shown in FIG. 8, this example is an example of a foamed resin molding die 1 having a chamber 3 only on the bottom surface 21 of the molding chamber 2.
  the aboveProvided on the bottomThe chamber 3 has a plurality of compartments 31, and the compartments 31 have a large number of communication holes 319.
[0060]
Except for the bottom surface 21 of the molding chamber 2, the molding chamber 2 may be composed of only side frames and an upper plate. In this case, in order to prevent heat loss, it is preferable to stick a heat insulating board on the outside or the inside. Moreover, you may provide the space part which does not flow a vapor | steam in a side part and an upper surface type.
Others are the same as in the first embodiment.
[0061]
  According to this example, as shown in FIGS. 8B and 8C, the foamed resin particles are supplied by supplying the steam 61 from the bottom surface 21 of the molding chamber 2 and exhausting, as in the first embodiment. Can be heated.
  In addition, the metal mold | die 1 of this example is effective for shaping | molding of the foamed resin composite molded body 501 shown to FIG. 7 (A), for example.
Moreover, according to this example, a foamed resin composite molded body having a low water content can be obtained.
  In addition, it has the same effects as the first embodiment.
[0062]
Reference example 1
  This example is an example of a foamed resin molding die 1 composed of two upper and lower concave molds 12 as shown in FIG. The chamber 3 provided in the concave mold 12 is partitioned into a plurality of the compartments 31 by a partition wall 35 orthogonal to the bottom surface 21 of the molding chamber 2.
  Others are the same as in the first embodiment.
[0063]
According to this example, as shown in FIGS. 9A and 9B, the steam 61 is supplied from all of the upper surface 23, the bottom surface 21 and the side surface 22 of the molding chamber 2, and the molding chamber gas 62 is exhausted. By doing so, the vapor-foamed resin particles can be heated.
The mold 1 of this example is effective for molding a foamed resin composite molded body in which a core material or the like is disposed at the center portion, for example.
In addition, it has the same effects as the first embodiment.
[0064]
Example embodiment3
  As shown in FIG. 10, this example includes a lower concave mold 12 and an upper flat mold 11, and the chamber 3 provided on the side surface 22 of the molding chamber 2 is a mold 1 partitioned into a plurality of compartments 31. It is an example.
  That is, the chamber 3 provided in the concave mold 12 is partitioned into a portion in contact with the bottom surface 21 of the molding chamber 2 and a portion in contact with the side surface 22, and a portion in contact with the side surface 22 is a partition perpendicular to the bottom surface 21. A plurality of compartments 31 are partitioned by 35.
  Others are the same as the first embodiment.
[0065]
According to this example, as shown in FIGS. 10B and 10C, the foamed resin particles are directly heated by supplying the steam 61 only from the side surface 22 of the molding chamber 2 and exhausting the molding chamber gas 62. In addition, the foamed resin particles can be indirectly heated from the upper surface 23 and the bottom surface 21.
The mold 1 of this example is effective for molding the foamed resin composite molded bodies 502, 503, 5, and 504 shown in FIGS. 7B, 7C, 7D, and 7E, for example.
In addition, it has the same effects as the first embodiment.
[0066]
Example 1
This example specifically shows an example in which a foamed resin composite molded body is molded using the foamed resin molding die 1 and the molding machine 10 of the first embodiment.
That is, the molding machine 10 shown in FIG. 1 was manufactured, and the foamed resin composite molded body 5 having the configuration shown in FIG. 6 was molded. This will be described in detail below.
[0067]
As the molding machine 10, a vertical vertical opening / closing type as shown in FIG. 1 was used. For mold clamping, the flat mold 11 is clamped by a hydraulic cylinder 14 and fixed by side lock pins 17. Note that the valves 490 to 497 are all manually operated.
[0068]
Next, the mold 1 will be described with reference to FIGS.
The structure of the mold 1 is a foamed resin molding mold 1 including a flat mold 11 and a concave mold 12 shown in FIG. The flat mold 11 is provided with a chamber 30. The chamber 30 and the flat mold 11 were partitioned by a removable inside wall having no communication hole. The flat mold 11 is provided with a steam supply / discharge line 301 and a water / air cooling pipe (not shown) from the outside.
[0069]
The concave mold 12 was provided with a chamber 3. The chamber 3 exists integrally on the bottom surface 21 and the side surface 22 of the molding chamber 2. The chamber 3 was provided with a partition wall 35 orthogonal to the bottom surface 21 of the molding chamber 2 and divided into six compartments 31.
The bottom surface 21 and the side surface 22 of the molding chamber 2 and the chamber 3 are partitioned by an inside wall provided with a number of slit-like communication holes 319 as shown in FIG. Further, the inside wall on the bottom surface 21 is fixed to the concave mold 12 with a flat screw so that it can be removed.
[0070]
As shown in FIG. 1, the molding machine 10 includes a first pipe 43 that connects three first compartments 311, a second pipe 44 that connects three second compartments 312, and a water / air cooling line ( (Omitted in the figure). The partition walls 35 of the bottom chamber were provided at a pitch of 466 mm. Further, as shown in FIG. 5, a filling gun 15 and a release pin 16 are provided on the bottom surface of the mold 1.
The size of the molding chamber 2 of the mold 1 was 910 × 2800 mm.
[0071]
As the pre-expanded resin particles, 50-fold expanded polystyrene resin (trade name: Styropol JF-200) manufactured by Mitsubishi Chemical BASF Corporation was used and filled in the molding chamber 2.
[0072]
As the surface material 51 and the reinforcing material 52, the following were used.
As the molding of the foamed resin composite molded body 5, composite panel molding having the configuration shown in FIGS. The panel dimensions are 910 × 2730 × 114 mm.
Therefore, as the surface material 51, a commercially available plywood having a width of 910 mm × a length of 2730 × a thickness of 12 mm was used. As the reinforcing material 52, a rice bran material having an arbitrary size cut was used.
[0073]
The following were used as the adhesive.
That is, a chloroprene rubber solvent type adhesive (trade name: G10) manufactured by Konishi Bond Co., Ltd., diluted twice with a thinner for the thinning solution was used. This is applied to the surface of the surface material 51 and the reinforcing material 52 with a brush at 150 g / m.²It was applied and dried at room temperature for 30 minutes.
[0074]
Next, a method for molding the foamed resin composite molded body 5 will be described.
After applying an adhesive to the surface material 51 and the reinforcing material 52, the structure shown in FIGS. 6 and 7 was mounted in the molding chamber 2 of the mold 1 and clamped.
The pre-expanded resin particles are filled in the chamber 3 and the molding chamber 2 by vacuum suction from -0.5 to -0.8 kg / cm.²Then, the vacuum valves 491 and 493 are closed, the filling gun 15 is opened, and the pre-foamed resin particles are filled.
[0075]
At this time, the internal pressure of the chamber 3 and the molding chamber 2 is 0 kg / cm.²The vacuum valves 491 and 493 are opened again, and the inside of the chamber 3 and the molding chamber 2 is -0.5 kg / cm.²The pressure was reduced to. The filling gun 15 was opened and the pre-expanded particles were filled five times in total, and the pre-expanded particles were blown back to complete the filling. The process of depressurizing the inside of the chamber 3 is started from the start of blowback, and −0.8 kg / cm in 15 seconds.²Reached.
[0076]
In the first heating step, the valve 490 of the concave mold 12 was opened, and the vapor 61 was allowed to flow into the first compartment 311. At the same time, the valve 493 was opened and vacuum suction was performed from the second compartment 312 for 60 seconds. The other valve 49 is closed. At this time, in the flat mold 11, the valve 494 is opened and the steam 61 is flown, and the steam pressure is 0.5 kg / cm.²Set to.
[0077]
After the first heating step, the internal pressure of the chamber 3 is -0.5 kg / cm²Since it was below, valve | bulb 490 was closed, valve | bulb 491 was opened, and the pressure reduction process by vacuum suction was performed from all the compartments 31 for 5 seconds.
Next, the valve 493 was closed, the valve 492 was opened, the steam 61 was allowed to flow into the second compartment 312, and the second heating step of vacuum suction from the first compartment 311 was performed for 60 seconds.
Next, the main heating step was performed in which the valve 491 was closed, the valve 490 was opened, and the steam 61 was allowed to flow in the first compartment 311 and the second compartment 312 for 60 seconds.
[0078]
The initial pressure reduction degree of the chamber 3 in the first heating step is −0.8 kg / cm.²Met. The set pressure of the steam is 0.6 kg / cm at the internal pressure of the chamber 3.²It was.
The initial pressure reduction degree of the chamber 3 in the second heating step is −0.5 kg / cm.²The pressure reduction step by vacuum suction was set to 5 seconds.
[0079]
After completion of the main heating, the steam supply valves 490 and 492 were closed, and the drain valves 496 and 497 were opened and exhausted. After evacuation, water cooling was performed for 10 seconds, and then air was supplied to the chamber 3 to discharge water for 10 seconds.
Next, the valves 496 and 497 were closed, the valves 491 and 493 were opened, and vacuum cooling was performed for 180 seconds. At this time, the internal pressure of the chamber 3 is -0.8 kg / cm.²It is. Next, the mold was opened, and the molded product was taken out by the release pin 16.
In the obtained foamed resin composite molded body 5, the surface plate 51 and the reinforcing material 52 and the pre-foamed particles were sufficiently bonded, and there was no gap between the pre-foamed particles, and it was good as a heat insulating panel for buildings. .
[0080]
Example 2
  This example is the embodiment shown in FIG.36 is an example in which the foamed resin composite molded body 5 shown in FIG. 6 is molded using the mold 1 in which the chamber 3 provided on the side surface 22 of the molding chamber 2 is partitioned into a plurality of compartments 31.
  That is, the heating molding method in a state in which the inside wall at the bottom portion installed in the concave mold 12 used in Example 1 is removed and replaced with a 12 mm thick aluminum plate without a communication hole, and steam cannot be supplied into the molding chamber 2 from the bottom portion. Carried out.
[0081]
In the mold 10, only the chamber 3 on the side surface 22 of the molding chamber 2 has a communication hole 319 as shown in FIG. 10.
The panel configuration was the same as in Example 1 except that the two types shown in FIGS. 7A and 7D were molded.
[0082]
In all the foamed resin moldings, the surface plate 51 and the reinforcing material 52 and the pre-expanded particles were sufficiently bonded, and particularly on the small edge surface, there was no gap with the pre-expanded particles.
That is, the foamed resin composite molded body 5 of this example was good as a heat insulating panel for buildings.
[0083]
【The invention's effect】
As described above, according to the present invention, even when the surface material or the reinforcing material is disposed on a part of the foamed resin molded body, the foamed resin is sufficiently heated and fused to form a foamed resin molded body having high strength. It is possible to provide a mold for molding a foamed resin and a molding method using the same.
[Brief description of the drawings]
FIG. 1 is a vertical sectional view showing a molding machine and a mold structure in Embodiment 1;
2A is a vertical sectional view of a mold in Embodiment 1, FIG. 2B is a horizontal sectional view showing a flow of steam, and FIG. 2C is a vertical sectional view showing a flow of steam;
FIG. 3 is an explanatory diagram of a communication hole in the first embodiment.
FIGS. 4A and 4B are explanatory diagrams of (A) a first heating step and (B) a second heating step in a heating and foaming step in Embodiment 1. FIG.
FIG. 5 is an explanatory view of the arrangement of a mold release pin and a filling gun in Embodiment 1;
6A is a perspective view of a foamed resin composite molded body in Example 1, FIG. 6B is a cross-sectional view taken along line AA in FIG. 6B, and FIG. 6C is a cross-sectional view taken along line B-B in FIG. Sectional drawing.
7 is a cross-sectional view of various foamed resin composite molded bodies in Example 1. FIG.
8A is a vertical sectional view of a mold in Embodiment 2, FIG. 8B is a horizontal sectional view showing a flow of steam, and FIG. 8C is a vertical sectional view showing a flow of steam.
FIG. 9Reference example 1(A) vertical sectional view of the mold, (B) horizontal sectional view showing the flow of steam, (C) vertical sectional view showing the flow of steam.
FIG. 10 shows an embodiment example.3(A) vertical sectional view of the mold, (B) horizontal sectional view showing the flow of steam, (C) vertical sectional view showing the flow of steam.
[Explanation of symbols]
    1. . . Mold,
  10. . . Molding machine,
  11. . . Flat type,
  12 . . Concave,
    2. . . Molding room,
  21. . . Bottom,
  22. . . side,
  23. . . Top surface,
    3, 30. . . Chamber,
  31. . . Branch office,
311. . . First branch,
312. . . Second branch,
319. . . Communication hole,
  41. . . Steam supply pipe,
  42. . . Exhaust pipe,
    5. . . Foamed resin composite molded body,
  61. . . steam,
  62. . . Molding chamber gas,

Claims (2)

A mold for foamed resin molding having a molding chamber and a chamber disposed only on the bottom surface of the molding chamber,
The chamber over is partitioned into a plurality of compartments,
Each compartment each have a communication hole communicating with the molding chamber, and a mold for the resin foam each compartment is characterized in that it is connected to a steam supply and exhaust pipes. A mold for foamed resin molding having a molding chamber and a chamber disposed in part or all of the periphery of the molding chamber,
  At least one of the chambers is partitioned into a plurality of compartments,
  Each compartment has a communication hole communicating with the molding chamber, and each compartment is connected to a steam supply pipe and an exhaust pipe.
  The mold includes a concave mold and a flat mold, or a concave mold and a convex mold, and the chamber provided in the concave mold is partitioned into a plurality of the compartments by a partition perpendicular to the bottom surface of the molding chamber. A mold for molding foamed resin, wherein the chamber provided in the flat mold or the convex mold does not have the communication hole.

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