The present disclosure provides a mold of a resin body capable of reducing the cost of manufacturing a resin body including a resin base material and a foamed resin part provided on the resin base material. This mold is a mold of a resin body including resin base material molding die parts for molding a resin base material. The mold includes: a sliding part capable of sliding inside a foamed resin part molding cavity that communicates with a resin base material molding cavity of the resin base material molding die parts. The sliding part is swingably floated in a direction perpendicular to a sliding surface on which the sliding part slides. In the process of molding the resin base material, the sliding part blocks an opening part that communicates from the resin base material molding cavity to the foamed resin part molding cavity.

To provide a new foam molding method and injection molding machine capable of solving variation in a wall thickness and a foamed state, sensor corrosion, a complexity of sensor positioning, and the like. The above-described problem is solved by a foam molding method comprising a resin filling step of filling a mold (2), clamped by a predetermined mold clamping force (Pc), with a resin (R) at a predetermined molding injection pressure (Pi), a filling stopping step of stopping the filling of the resin (R) when, while monitoring a mold gap (Lm) of the mold (2) during the filling, a predetermined mold gap value set in advance is reached, a surface layer curing and filled resin cooling step of curing a surface layer of the resin (R) for a certain time and cooling the filled resin (R) for a certain time after the filling of the resin (R) is stopped, a volume controlling step of controlling a volume increase by reducing the mold clamping force after curing the surface layer of the resin (R) for a certain time, and a taking out step of taking out a foam-molded product by opening the mold (2) after the volume control is performed and after cooling the filled resin (R) for a certain time.

To manufacture a motor vehicle composite component, plastic particles are introduced into a mold cavity of a mold and are connected there to one another to form a particle foam. The mold is then adjusted while the mold cavity changes, and a thermoplastic plastic is then injected into the mold cavity while a carrying element and/or at least one fastening element are formed, wherein the thermoplastic plastic is bonded to the particle foam at least by connection in substance. The aforementioned materials may also be introduced in the reverse order. The mold is then adjusted once again while the mold cavity changes, and a metal melt is then injected into the mold cavity, as a result of which an electrical strip conductor and/or at least one metallic fastening element are formed.

The invention relates inter alia to a method of making a thin component (10) in lightweight sandwich construction with a high-quality surface (26).

An interior part for a vehicle is formed by core-back expansion molding. The interior part includes a foamed plastic body formed by injecting a foamable plastic resin into a mold and separating the mold portions of the mold to allow foaming expansion of the foamable plastic resin. An edge portion of the foamed plastic body includes a projecting freeze section and a core-back expansion radius located adjacent to the projecting freeze section. The projecting freeze section is formed in a freeze seal area of the mold adjacent a parting line to help prevent excessive flashing of material at the parting line during separation.

An interior part for a vehicle is formed by core-back expansion molding. The interior part includes a foamed plastic body formed by injecting a foamable plastic resin into a mold and separating the mold portions of the mold to allow foaming expansion of the foamable plastic resin. An edge portion of the foamed plastic body includes a projecting freeze section and a core-back expansion radius located adjacent to the projecting freeze section. The projecting freeze section is formed in a freeze seal area of the mold adjacent a parting line to help prevent excessive flashing of material at the parting line during separation.

Multi-step method for producing a soundproof composite cover for internal combustion engines and product thus obtained, producing a cover made of thermoplastic material and insulating foam. The method uses a multiple mold with first and second cells, having male and female elements, the cells taking a first closed configuration and a second open configuration; the method including: closing the multiple mold and injecting the thermoplastic material through a channel from a hot chamber to the first cell; the thermoplastic material solidifies and the multiple mold is opened to move the solidified thermoplastic material from the first cell to the second cell; closing the multiple mold and, while a new injection occurs in the first cell, an insulating foam is injected into the second cell; and opening the double mold and, while the finished product is extracted from the second cell, a new transfer occurs from the first cell.

Among other things, the invention relates to a method of making a thin construction element (10) in sandwich lightweight construction having a high-quality surface (26).

A resin molded product includes a main body including a design face and a opposite face opposite to the design face and having a first foamed layer formed inside the main body, and a protruding portion located at a periphery of the main body, having a second foamed layer formed inside the protruding portion, and protruding to a thickness direction of the main body and a side opposite to the design face, the protruding portion includes a tip end portion disposed so that a protruding tip portion on the design face extends to a protruding direction of the protruding portion more than a protruding tip portion on the opposite face, and a thickness of the tip end portion is 1.2 mm or less.

A molded body, comprising a foamed portion in which a skin layer A, a foamed layer and a skin layer B are disposed in this order in a thickness direction, wherein in the foamed portion, the foamed layer has a ratio of thickness, with respect to a total thickness of the skin layer A, the foamed layer and the skin layer B, of from 73% to 88%.