A melting heater configured to melt joining end surfaces of a pair of semi-molded products in a case where the joining end surfaces are melted and joined to manufacture a molded product, the melting heater including: two glass plates arranged in parallel to each other; and a plurality of element heaters arranged in a unit having a flat plate shape as a whole between the two glass plates, in which the glass plate is subjected to surface processing for controlling infrared rays emitted from the plurality of element heaters.

For manufacturing a component formed of a plurality of moldings, which are made of plastic, are welded together. A first molding is manufactured in a first mold that has a first mold part and is then transported with the first mold part into a welding station. Correspondingly, a second molding is manufactured in a second mold that has a second mold part and is transported with the second mold part into the welding station. The mold parts holding the moldings are moved towards one another in the welding station such that the moldings are welded together. Additional moldings are manufactured in the molds simultaneously with the welding of the moldings.

The invention is directed to a process to manufacture an interconnected stack of thermoplastic frames having two sides by stacking the thermoplastic frames to obtain a stack of frames such that the facing sides of two neighbouring frames are in contact with each other at a contact area. When stacking a longitudinal conduit is formed which runs along the length of the stack and a branched conduit is formed at the contact area. The interconnected stack of thermoplastic frames are obtained by supplying a pressurised melt of a plastic material to the elongated conduit and branched conduits.

A performance in a technique using a heater for manufacturing a resin molding product is further improved. A method of manufacturing a resin molding product includes: a step of placing a first portion configuring a resin molding product, in a first mold; a step of placing a second portion configuring a resin molding product, in a second mold; a step of inserting a heater between the first mold and the second mold; a step of partially heating the first portion and the second portion by the heater; a step of evacuating the heater; a step of welding the first portion and the second portion; and a step of extracting the resin molding product including the first portion and the second portion.

The invention is directed to a process to manufacture an interconnected stack of thermoplastic frames having two sides by stacking the thermoplastic frames to obtain a stack of frames such that the facing sides of two neighbouring frames are in contact with each other at a contact area. When stacking a longitudinal conduit is formed which runs along the length of the stack and a branched conduit is formed at the contact area. The interconnected stack of thermoplastic frames are obtained by supplying a pressurised melt of a plastic material to the elongated conduit and branched conduits.

A mold is provided. First and second materials are introduced into respective first and second portions of the mold to create a first and second parts of the item. The first and second parts of the item are allowed to solidify. The mold is opened and a heating element is inserted into the mold. A section of each of the first and second parts of the item is heated to above their glass transition temperatures with the heating element. The heating element is removed from the mold. The mold is closed such that the sections of the first and second parts of the item come into contact with each other. The sections of the first and second parts are cooled to below their glass transition temperatures to become joined. The mold is opened such that the item can be removed from the mold.

A mold is provided. First and second materials are introduced into respective first and second portions of the mold to create a first and second parts of the item. The first and second parts of the item are allowed to solidify. The mold is opened and a heating element is inserted into the mold. A section of each of the first and second parts of the item is heated to above their glass transition temperatures with the heating element. The heating element is removed from the mold. The mold is closed such that the sections of the first and second parts of the item come into contact with each other. The sections of the first and second parts are cooled to below their glass transition temperatures to become joined. The mold is opened such that the item can be removed from the mold.

An insert for an injection-moulding nozzle, having an insert body which has a rear end and a front end and in which at least one flow duct is formed between the rear end and the front end. In this case, the insert body has a first part for arranging the insert on or in the injection-moulding nozzle and a second part for arranging on or in a mould insert. The first part is manufactured from a first material and extends from the rear end of the insert body to a contact surface. The second part is manufactured from a material different from the first material and extends from the contact surface to the front end of the insert body. Furthermore, the first part and the second part are connected firmly together at and/or along the contact surface. Also disclosed, an injection-moulding nozzle can include the insert.

An injection molding machine system includes an injection molding machine, a mold, a heating heater device, and a pressing device. When the mold is closed or clamped, two or more primary molding cavities and one or more secondary molding cavities are formed. Primary molded articles are molded through injection molding when injected into the primary molding cavities. The pair of primary molded articles are placed in the secondary molding cavity, bonding end surfaces are melted by the heating heater device, and the mold is closed or clamped. When the pair of primary molded articles are pressed together by the pressing device, the primary molded articles are fused to each other to form a molded article.

A mold includes a guide pin configured to guide mold closing. The guide pin is housed in a guide pin housing hole formed in a parting line and is configured to be driven by a predetermined drive mechanism. The guide pin is configured to protrude its tip end from the parting line and to retract into the guide pin housing hole by the drive mechanism.