The present invention relates to a method for producing foam and foam produced thereby. The method for producing foam includes a step for producing foam by kneading and injection molding a first extrusion product and a second extrusion product, wherein the first extrusion product is obtained by extruding a first composition including an aromatic vinyl-based resin, and the second extrusion product is obtained by extruding a second composition including a polyamide resin and a foaming agent.

According to the present invention, a side part cavity (23) in which a side part is molded, a body part cavity (24) in which a body part is molded, and an attachment part cavity (25) in which an attachment part is molded are formed between a plurality of molding molds (21, 22), and a guiding part (26) that is configured to guide a foam to the body part cavity when an undiluted foam solution of the second synthetic resin material supplied to the side part cavity foams is arranged at a part of the side part cavity adjacent to, in a left-right direction X, a rear end part of the body part cavity in which a non-contact part is molded.

A method of making a vehicle headrest restraint and connecting first and second molds to form a mold cavity. A first material is injected with a first density into the mold cavity. A second material is injected with a second density into the mold cavity. The first and second materials are allowed to develop an integrally formed headrest.

The present disclosure provides a resin seal member capable of reducing the cost while preventing a reduction in the sealing performance due to an influence of heat or pressure in accordance with a usage environment. The present disclosure provides a resin seal member (20) including a foamed resin part (13). This resin seal member (20) includes a convex part (12b) having a foaming ratio lower than that of the foamed resin part (13). The convex part (12b) is provided in an end part of the foamed resin part (13). The resin seal member (20) is able to reduce the cost while preventing the reduction in the sealing performance due to the influence of heat or pressure in accordance with the usage environment.

A foam molding apparatus and a foam molding method thereby are proposed. The foam molding apparatus includes a foaming agent supply unit configured to supply a foaming agent, a molten resin supply unit configured to supply molten resin, a fixed mixing unit configured to produce a foaming resin-critical solution by mixing a foaming agent supplied from the foaming agent supply unit and molten resin supplied from the molten resin supply unit through a rod-shaped body, and a molding unit configured to mold a foam molding product using the foaming resin-critical solution supplied from the fixed mixing unit. Accordingly, it is possible to produce a foaming resin-critical solution by uniformly mixing a large amount of high-viscosity gel-state molten resin and a high-pressure compressed and low-viscosity foaming agent, using high-strength multiple channels.

A method of making a vehicle headrest restraint and connecting first and second molds to form a mold cavity. A first material is injected with a first density into the mold cavity. A second material is injected with a second density into the mold cavity. The first and second materials are allowed to develop an integrally formed headrest.

An injection molding system is provided. The injection molding system includes a first carrier, a first injector, a second carrier, a second injector, and a bridging mechanism. The first carrier is configured to hold a first mold. The first injector is disposed over the first carrier and configured to inject a first polymeric material. The second carrier is configured to hold a second mold. The second injector is disposed over the second carrier and configured to inject a second polymeric material. The bridging mechanism is disposed between and rotatable relative to the first carrier and the second carrier. The bridging mechanism is configured to receive a third mold from the first carrier or the second carrier and convey the third mold between the first carrier and the second carrier.

A method of making a vehicle headrest restraint and connecting first and second molds to form a mold cavity. A first material is injected with a first density into the mold cavity. A second material is injected with a second density into the mold cavity. The first and second materials are cooled to develop an integrally formed headrest.

An injection molding method is provided. A molding device is provided and includes a first mold, a second mold over the first mold and a mold cavity defined by the first mold and the second mold. A first mixture is injected into the mold cavity through a first feeding port. A first component is formed from the first mixture. A second mixture is injected into the mold cavity through a second feeding port. A second component is formed from the second mixture. The second component is at least partially contact with the first component, and the first component and the second component have different physical properties.

In a curable composition for mechanical foaming, bubbles are evenly dispersed and bubbles do not rise to the liquid surface and from which a foam can be favorably formed when the curable composition for mechanical foaming is mechanically foamed. A curable composition for mechanical foaming has a complex viscosity * satisfying the following conditions (A) and (B) in frequency dependence measurement by a rheometer, in which the curing form of the curable composition for mechanical foaming is not a moisture curing form: condition (A): * at 0.1 Hz and 25 C. is in a range of 1000 to 50000 Pa.Math.s; and condition (B): * at 10.0 Hz and 25 C. is in a range of 100 to 1000 Pa.Math.s.