A method for making a foam component is provided and includes inserting a foam material into a cavity of a mold having a top plate and a bottom plate, heating the foam material to cause the foam material to expand, and moving one of the top plate and the bottom plate relative to the other of the top plate and the bottom plate as the foam material expands and contacts the one of the top plate and the bottom plate to cause the foam material to fold over on itself within the cavity.

In a polypropylene-based foamed molded body of the present invention, a density which is measured on the basis of ISO1183 is greater than or equal to 0.15 g/cm.sup.3 and less than or equal to 0.54 g/cm.sup.3, thermal resistance (R) at 30° C. in a thickness direction which is measured on the basis of ASTM E1530 is greater than or equal to 0.020 m.sup.2.Math.K/W and less than or equal to 0.125 m.sup.2.Math.K/W, thermal capacity per unit area (Q) at 30° C. is greater than or equal to 1.0 kJ/m.sup.2.Math.K and less than or equal to 2.5 kJ/m.sup.2.Math.K, and Expression 1 described below is satisfied.

Q>1/(4×R.sup.1/2)  (Expression 1)

Provided are a method for molding a foamed resin molded article having a mounting hole which is formed with good dimensional precision without occurrence of shape sag and which has an improved load resistance, a mold therefor, and a foamed resin molded article thereby. A method for molding a foamed resin molded article 1 including a mounting section 11 and a non-mounting section 12, using a mold 3 including a first mold 31 having a non-mounting-section mold portion 31a and a mounting-section mold portion 31b, a second mold 32, and a cavity 4 having a non-mounting-section cavity portion 42 for molding the non-mounting section 12 and a mounting-section cavity portion 41 for molding the mounting section 11. The method includes: a filling step of filling a material to be molded into at least the mounting-section cavity portion 41; and a core-back step of moving at least one of the non-mounting-section mold portion 31a, the mounting-section mold portion 31b, and the second mold 32 so that a cavity width of the non-mounting-section cavity portion 42 is increased while a cavity width of the mounting-section cavity portion 41 is constant, the filling step and the core-back step being sequentially performed.

In methods and apparatuses for producing auxetic foam from conventional foam, conventional foam is compressed into a mold before thermal, chemical or thermo-chemical treatment processes are performed. A segmented mold is accommodated in a compressing apparatus. After compressing the foam between the mold segments, the mold is fastened shut and removed from the compressing apparatus. The forces applied to any given volume of foam and the amounts by which the foam is compressed while being processed are controlled to impart desired mechanical properties to the produced foam. Poisson's ratio and density of discrete portions of finished foam shapes are reliably predicted and controlled to achieve uniform and non-uniform mechanical properties within a single continuous quantity of foam.

A mold, a molding machine, and a foamed molded body manufacturing method are provided that are capable of more reliably preventing ingress of foamed resin into a gas discharge hole using a gas-impermeable member and capable of adequately discharging gas inside the cavity to the cavity outside through the gas discharge hole during foam molding, and that are also capable of achieving good design characteristics in a foamed molded body. A gas discharge hole 5 is provided at a cavity 4 inner face of a mold 1 and discharges gas inside the cavity 4 to outside the cavity 4. A gas-permeable member 6 is disposed inside the cavity 4 of the mold 1 so as to cover the gas discharge hole 5, and a gas-impermeable member 8 is disposed on the gas discharge hole 5 side of the gas-permeable member 6 so as to face the gas discharge hole 5. A portion of the gas discharge hole 5, spanning at least from axial direction intermediate portion of the gas discharge hole 5 to the cavity 4 side of the gas discharge hole 5, is configured with a tapered profile portion 5a that increases in diameter on progression toward the cavity 4 side.

A device for manufacturing inner trim elements which are formed by a rigid carrier and a cover layer, between which elements a polymer foam layer is arranged. The carrier is fixable on a first moulding tool element, and the cover layer is fixable between the outer edge of the first moulding tool element and the outer edge of a second moulding tool element. In the moulding tool, a cavity is formed between the carrier and the cover layer, wherein a foamable polymer is introducible into the cavity via at least one through-hole which is formed in the carrier and the first moulding tool element. The distance between the first and the second moulding tool element is enlargeable during the foaming process. At least one through-hole for an escape of air and reactively formed gases out of the cavity is formed in the carrier and in the first moulding tool element.

A shoe sole member formed by a foam includes cells having a certain size and being excellent in transparency in order to provide a shoe sole member being lightweight and excellent cushioning properties while having transparency.

A movable mold includes a main mold part, a separate mold part separate from the main mold part, and a relative movement mechanism moving the separate mold part relative to the main mold part in a driving direction of a mold driver.

A molding method includes providing a molding device, wherein the molding device includes a first mold and a second mold corresponding to the first mold; moving the first mold towards the second mold to form a first mold cavity; supplying a gas to the first mold cavity; injecting a material into the first mold cavity; and moving the first mold away from the second mold to form a second mold cavity and discharge at least a portion of the gas out of the molding device, wherein a first volume of the first mold cavity is substantially less than a second volume of the second mold cavity.

The present invention is a manufacturing method for obtaining a molded article having foam layer inside for providing a foaming agent, a device, a mold, a molding machine, a means for increasing the foaming ratio and a means for increasing coating appropriateness used for manufacturing resin having foaming properties. When the resin having compatibility (miscibility) with the resin to be blended is used as a carrier resin used for manufacturing a masterbatch of the foaming agent, the molded article having an excellent outer appearance can be obtained. When the sodium bicarbonate which is an inorganic foaming agent is used for the foaming agent, a sodium carbonate, which is a foam residue remaining in the molded article after the foaming agent is decomposed to generate the foaming gas, reduces the adherability of the coating film. Thus, when the acid cleaning is preliminarily performed to remove the sodium carbonate, the coating appropriateness is satisfied. When performing the GCP, the thickness of the skin layer located at the surface varies depending on the surface temperature of the mold. In general, the means using the heated steam is generally used for increasing the temperature of the mold. In the present invention, the means for heating the magnetic fluid (liquid) by high frequency induction heating is used. Thus, the temperature of the mold can be safely increased at low cost with heating efficiency. When a mold-back or a core-back is performed for obtaining the molded article having high foaming ratio, the resin is separated from the fixed side. The present invention provides the means for solving the above described problem of the separation by using the gas.