Abstract: A molded article of a thermoplastic resin with good apperance which may have a skin material is produced by providing upper and lower molds having a product part-molding section and a non-product part-molding section, supplying a melt of a thermoplastic resin in a cavity of the molds or a space between the skin material and either one of the upper and lower molds through a resin melt passage which is formed in a wall of one of the molds and has an opening for supplying the melt in the non-product part-molding section when a clearance of the cavity is larger than a thickness of a finally produced article, closing the molds to effect press molding, cooling the molds.

Abstract: A method for producing a multilayer molded article by facing a preheating panel on which a preheated skin material is placed towards one of upper and lower molds, forming a closed space by the mold and the preheating panel, evacuating the closed space to suck the skin material onto a surface of the mold, removing the preheating panel, supplying a resin through a resin conduit with closing the molds or temporarily stopping mold closing, and finishing the mold closing. By this method, a multilayer molded article having a resin body which is made by deep drawing or has a complicated shape and a skin material laminated on a surface of the resin body can be produced.

Abstract: A multilayer molded article with improved appearance having a core of a thermoplastic resin and a skin material laminated on the resin core, in which the skin material is made of a fabric which is lined with a nonwoven fabric having a weight of at least 50 g/m.sup.2 and an elongation at break of 20% to 80% and optionally has an intermediate foam layer between the fabric and the nonwoven fabric.

Abstract: A process for producing a skin material-laminated hollow molded article of thermoplastic resin, using a mold having, in any one or both of its fixed and movable parts, at least one fluid-ejecting pin which can be slid in a clamping direction and which has a fluid-ejecting hole at its pointed end. The process consists of fixing two sheets of a skin material having a tensile modulus at ambient temperature of 50-1,000 kg/cm.sup.2 and a tensile modulus at 80.degree. C. of 5 to 100 kg/cm.sup.2 on the parting surfaces of both the mold parts which are in the open state. A molten thermoplastic resin is fed between the skin materials in an amount of 5 to 50% by volume of the cavity volume. The fluid-ejecting pin is thrusted so that its pointed end penetrates one of the skin material sheets and comes between the skin material sheets. The mold parts are closed to wrap the molten thermoplastic resin in between the skin material sheets.

Abstract: A method of forming a multilayer molded article with improved appearance having a core of a thermoplastic resin and a skin material laminated on the resin core, in which the skin material is made of a fabric which is lined with a nonwoven fabric having a weight of at least 50 g/m.sup.2 and an elongation at break of 20% to 80% and optionally has an intermediate foam layer between the fabric and the nonwoven fabric.

Abstract: A fiber reinforced thermoplastic resin shaped article is prepared by supplying a preheated fiber reinforced thermoplastic resin sheet between upper and lower molds, positioning the upper and lower molds so that a clearance between the upper and lower molds at the time of the completion of mold clamping is larger than a thickness of the unpreheated fiber reinforced thermoplastic resin sheet, and supplying a molten thermoplastic resin in a recess provided in at least one of the upper and lower molds through a resin passage provided in the mold so that a portion formed from the molten thermoplastic resin in the recess is integrated by fusion with a portion formed from the fiber reinforced thermoplastic resin sheet. The article is light-weight and also has a rib, a boss or any other projection.

Abstract: A concrete form a part of which is made of a fiber-reinforced thermoplastic resin, said fiber-reinforced thermoplastic resin satisfying the following conditions:Tt(C).gtoreq.Tt(M)-1.5.alpha.15.ltoreq.Tt(c)wherein Tt(C) (%) is total transmittance of the fiber-reinforced thermoplastic resin measured at the thickness of top board, .alpha. (% by weight) is fiber weight fraction of the fiber-reinforced thermoplastic resin, and Tt(M) (%) is total transmittance of the matrix resin measured at the same thickness as above.

Abstract: A method for producing a molded article of a fiber-reinforced thermoplastic resin, which includes supplying a melt mass of a thermoplastic resin which is reinforced with fibers dispersed therein and having an average fiber length of not shorter than 1 mm and not longer than 50 mm as a reinforcing material in an unclosed mold in which a film or sheet made of a thermoplastic resin having adhesiveness to a thermoplastic resin is optionally placed, closing the mold and pressurizing and cooling it to obtain a molded article.

Abstract: A fiber reinforced thermoplastic resin shaped article is prepared by supplying a preheated fiber reinforced thermoplastic resin sheet between upper and lower molds, positioning the upper and lower molds so that a clearance between the upper and lower molds at the time of the completion of mold clamping is larger than a thickness of the unpreheated fiber reinforced thermoplastic resin sheet, and supplying a molten thermoplastic resin in a recess provided in at least one of the upper and lower molds through a resin passage provided in the mold so that a portion formed from the molten thermoplastic resin in the recess is integrated by fusion with a portion formed from the fiber reinforced thermoplastic resin sheet.

Abstract: A multilayer molded article having a thermoplastic resin body and a skin material covering the resin body is produced by supplying a skin material between a pair of molds, holding the skin material between a skin material-holding frame which is moved in a direction perpendicular to a mold-closing direction and a skin material-supporting frame which is moved in the mold-closing direction, supplying a mass of a thermoplastic resin melt, and closing the molds to form a multilayer molded article, in which at least one moving member which moves forward or rearward in the mold closing direction is provided around a mold face and is recessed in the mold closing direction after the supply of the resin melt, at least one ejector which is provided on the skin material-holding frame is ejected to fold an edge of the skin material towards a center of the mold, and the moving member is forwarded toward the mold face so as to fold back the edge of the skin material over the back of the resin body.

Abstract: Press molding is carried out by using a mold having a nozzle which opens and closes a molten resin passage provided in an upper half or a lower half and which is located 10-100 mm below a mold cavity side surface of the half, by supplying a thermoplastic resin to a cavity between the respective upper half and the lower half which is not closed and by clamping the mold. Thus, a molded article having a good appearance can be produced even when a molding cycle is short.

Abstract: A method for molding a foamed particle of a polypropylene resin. The polypropylene resin includes a homopolymer and copolymer of polypropylene resin, as well as a mixture of a polypropylene resin and another resin.

Abstract: A multi-layer molded article which is made of a polypropylene resin body and a skin material lined with a foamed layer and has good appearance is produced by using molds between which a cavity clearance is freely set, placing a skin material lined with a foamed layer between the upper and lower molds and supplying a molten polypropylene resin containing a chemical blowing agent through a resin melt conduit in the lower mold when cavity clearance (t) is between (C+15) mm and (C+50) mm where "C" is a thickness of the skin material lined with the foamed layer, lowering the upper mold at a specific rate and pressing the molten resin at specific pressure to fill cavity ends with the molten resin to complete molding of a body of the resin, pressing the body for a certain time after completing molding to form a skin layer, lifting up the upper mold to decrease a compression pressure of the skin material lined with the foamed layer to a pressure lower than a blowing pressure of the polypropylene resin to form and sol

Abstract: A method for producing a molded article of a fiber-reinforced thermoplastic resin, which includes supplying a melt mass of a thermoplastic resin which is reinforced with fibers dispersed therein and having an average fiber length of not shorter than 1 mm and not longer than 50 mm as a reinforcing material in an unclosed mold in which a film or sheet made of a thermoplastic resin having adhesiveness to a thermoplastic resin is optionally placed, closing the mold and pressurizing and cooling it to obtain a molded article.

Abstract: A method for molding a foamed particle of a polypropylene resin. The polypropylene resin includes a homopolymer and copolymer of polypropylene resin, as well as a mixture of a polypropylene resin and another resin.

Abstract: A multi-layer molded article including a fiber-reinforced resin sheet and a skin material laminated thereon and having improved appearance is produced by placing a preheated fiber-reinforced resin sheet on a lower mold of a press-molding mold having a sliding frame which vertically moves around an outer periphery of the lower mold, placing a skin material over the placed fiber-reinforced resin sheet and the sliding frame, then lowering an upper mold of the press-molding mold to hold a periphery of the skin material between the sliding frame and the upper mold, further lowering the upper mold to press and adhere the fiber-reinforced resin sheet and the skin material.

Abstract: A multi-layer molded article including a thermoplastic resin body having a plurality of ribs and/or bosses on one side and a layer of a foam which is laminated on the side of the thermoplastic resin body having ribs and/or bosses is produced by a press molding method. The method involves the steps of supplying a foam between upper and lower halves of a mold, one of which has plurality of slits and/or holes corresponding to the ribs and/or bosses to be formed, supplying a quantity of a plasticized thermoplastic resin melt between the already supplied foam and the half of the mold not having any slit or hole, moving at least one half of the mold during supplying the thermoplastic resin or just after completion of supply of the thermoplastic resin to press mold the thermoplastic resin so that the plasticized thermoplastic resin breaks at least a part of areas of the foam on the slits and/or holes of the half of the mold to flow into the slits and/or holes and to form the ribs and/or bosses.