A molding device includes first and second molds, and a material passage. The first mold includes a first porous layer including a first porous main body, a first molding surface and a first connecting tube formed in the first porous main body. The first mold has a first gas passage for a gas to be supplied into the first porous main body. The second mold includes a second porous layer including a second porous main body, a second molding surface cooperating with the first molding surface to define a cavity, and a second connecting tube formed in the second porous main body. The material passage extends through one of the first and second molds, and is spatially communicated with the cavity for entrance of a supercritical foaming material into the cavity.

The invention relates to a mold, comprising at least one mold cavity defined by at least a mold wall, wherein at least one part of said wall is a porous part, wherein the at least one porous part is formed by or comprises a porous insert inserted into an opening extending into and preferably through said wall

A die for casting junctions of a coating of a pipeline is configured to be coupled to the pipeline to form an annular shaped closed compartment about a tubular joint portion comprising a tubular wall, which extends about a designated axis; a plurality of centering devices configured to align the axis of the tubular wall with a longitudinal axis of the pipeline; two annular walls arranged respectively at the opposite ends of the tubular wall; and two pluralities of vent openings arranged along the tubular wall respectively at each of the annular walls; and at least one feeding port configured to supply polymer material into the closed compartment.

A process for making a multilayered article, the process comprising the steps of: (A) Providing a mold comprising: (1) A mold housing comprising (a) at least one injection port, and (b) defining a mold cavity within which are positioned two deformable, pre-molded polymeric sheets; and (2) A removable, hollow core equipped with at least one vent, the removable, hollow core positioned between and space apart from the two polymeric sheets; (B) injecting under high pressure a viscous, crosslinkable, thermoplastic polymer into the mold cavity between the two polymeric sheets and around the removable core, (C) Drawing a vacuum on the mold cavity through both the vent in the mold housing and the vent in the removable, hollow core before, during and/or after the polymer has been injected into the mold; (D) Forming a less than fully cured multilayered article in the mold cavity; and (E) Removing the less than fully cured multilayer article from the mold cavity.

Rear quarter glass has a glass plate, a plastic molding, and a metal molding. A retainer is arranged between the plastic molding and the metal molding. The retainer has a first through-hole and a pin portion. The metal molding has a projecting portion that is inserted through the first through-hole. The projecting portion has an end section that projects from the first through-hole in a state inserted through the first through-hole. The plastic molding has a second through-hole through which the pin portion is inserted. The pin portion has an end section that projects from the second through-hole in a state inserted through the second through-hole. The end section of the projecting portion is swaged to the retainer by swaging through thermal deformation. The end section of the pin portion is swaged to the plastic molding by swaging through thermal deformation.

A percussive instrument mallet includes a molded head, a shaft having an optionally threaded nose, and a rigid insert fixed completely within the head. The insert has an inner profile including threads or other protrusions that mate with the nose of the shaft, and an outer profile that is embedded in the mold material. An outer portion of the insert includes a weighting ring that is also embedded in the mold material. The method includes selecting a tool with an optionally threaded nose and a central bore, threading or otherwise securing an insert onto the nose of the tool, supporting a weight ring on the insert; placing the threaded insert and weight ring in a mold, molding the head while over-molding the weight ring and insert, drawing air out of the head through the central bore, disengaging the tool from the insert, and attaching a mallet shaft into the insert.

Provided is a mold core structure, which is arranged on a mold. The mold core structure includes a mold core body, which is a solid body made of three-dimensional printing, wherein one side of the mold core body is provided with a molding part, which is combined with an internal structure of the mold to form a cavity, there is a conformal air duct inside the mold core body, the conformal air duct has at least one main air duct and a plurality of secondary air ducts, the main air duct has a first end and a second end, the first end is located on one side of the mold core body, and connected to an external pneumatic control device, the pneumatic control device controls air to enter or exit the cavity through the conformal air duct, the second end thereof is located inside the mold core body, a path of the main air duct is freely wound around the molding part between the first end and the second end, one end of each of the secondary air ducts is communicated with the main air duct, and another end thereof is communicated with the molding part and disposed towards an ejection direction of a finished product. Accordingly, the finished product is released from the mold by controlling the air through the pneumatic control device.

A gas venting/introducing structure (1) including a body (2) and a porous portion (3) integrated with the body (2) having a plurality of gas venting/introducing paths (4) each in communication with the porous portion (3) at one end. The plurality of gas venting/introducing paths 4 are open to the outside of the body (2) at other ends thereof such that at least two gas venting/introducing paths (4) merge into a single path (5). The body (2) is made of a porous metal denser than the material of the porous portion (3). The gas venting/introducing paths (4) each has an inner wall (4a) defined by a smooth surface. The distance between a communication side (3a) of the porous portion (3) and an opposite side (3b) is on the order of 4 mm. A concavity is formed at the communication part between the gas venting/introducing paths (4) and the porous portion (3).

A percussive instrument mallet includes a molded head, a shaft having an optionally threaded nose, and a rigid insert fixed completely within the head. The insert has an inner profile including threads or other protrusions that mate with the nose of the shaft, and an outer profile that is embedded in the mold material. An outer portion of the insert includes a weighting ring that is also embedded in the mold material. The method includes selecting a tool with an optionally threaded nose and a central bore, threading or otherwise securing an insert onto the nose of the tool, supporting a weight ring on the insert; placing the threaded insert and weight ring in a mold, molding the head while over-molding the weight ring and insert, drawing air out of the head through the central bore, disengaging the tool from the insert, and attaching a mallet shaft into the insert.

The present invention is directed to the design and production of a venting system contained in mold inserts for polymer grille formation, as well as a method for venting gas entrapment in any molding device. During the forming process of polymer grilles or any injection molded product, gas accumulates in the mold which needs to be vented out in a safe and effective manner. Venting out the gas without imposing alterations or blemishes on the product becomes a challenge. The present invention provides a solution to this issue through the use of porous material in the forming portion which allows the gas to escape from the mold without the use of vent apertures placed in the forming portion of the mold insert.