摘要:
A multi-point thin portion compression molding method and apparatus in which a plurality of ultra thin portions can be formed by compression molding. Mold apparatuses are opened/close to each other to form a cavity space having a molded material therebetween, at least one movable telescopic member passes through one metal mold and protrudes toward the other metal mold, the central and outer periphery of the telescopic member are provided with vent portions, and recess portions are formed on the metal mold contacting the vent portions to allow molten resin to escape, and the recess portions adjust a pressure applied to the cavity space by the compressing operation of the telescopic member.
摘要:
An apparatus for producing a plastic molded article or product for use in an optical device is a mold assembly. The mold assembly includes a pair of molds having an inner mold surface forming a cavity with a preselected volume into which a molten molding material is injected via a gate or sprue to fill the cavity and thereby form a molded product having a sink surface and at least one mirror surface after the molten molding material has cooled. The inner mold surface includes at least one transfer surface portion against which the at least one mirror surface of the molded product is formed, and at least one non-transfer surface portion against which the sink surface portion of the molded product is formed. The mold assembly also includes at least one vent hole, at least one bore in communication with the vent hole so that a preselected air pressure is applied to the molten molding material in the cavity via the bore and the vent hole, and at least one exhaust hole adjacent to, but spaced from the vent hole. Thus, only a part of the molded article or product expected to sink is surely caused to sink while, e.g., a mirror surface is surely transferred to a desired part of the molded article or product.
摘要:
A method of overmolding a heat pipe includes providing an injection mold apparatus having a cavity, an input gate, a bleed off overflow gate in communication with the cavity and a tubular heat pipe charged with phase change media which is capable of being collapsed by imparting an external collapsing pressure. The tubular heat pipe is placed into the cavity in the injection mold apparatus. A net shape moldable thermally conductive material is introduced into the cavity and around the tubular pipe. The bleed off overflow gate is set to open at a predetermined pressure which less than the external collapsing pressure which would damage the heat pipe to be overmolded. Pressure is relieved in the cavity of the mold apparatus through the bleed off overflow gate when pressure in the bleed off overflow gate reaches the predetermined pressure. As a result, delicate heat pipes can be overmolded in an injection mold apparatus without damage to the heat pipe during the molding process.
摘要:
The present invention is an improved mold-half that is useful in forming golf ball covers or other layers. The mold-half is particularly useful for compression molding a thin polyurethane cover over a golf ball formed from a plurality of inner layers. The mold-half includes a cavity and a land area surrounding the cavity. The land area has an upper surface and at least one vent in fluid connection with the cavity via a chamber formed by a recessed circumferential ledge adjacent the cavity. The ledge controls the flow of excess layer material from the cavity to each vent.
摘要:
The invention relates to a vulcanization mold for producing rubber goods, especially vehicle tires. The mold has a number of deairing holes into which blocking mechanisms are introduced. The blocking mechanisms ensure, especially by means of the air duct being bent, that the air can be drained without any disadvantageous flash being produced. In a second embodiment, the blocking mechanisms forms a two-part valve with the central body. In this case, the blocking mechanism has an elastically deformable planar area placed on the inside of the mold which acts at least essentially as a seal in conjunction with the central body when impinged upon by the surface of the blank.
摘要:
A mold has at least one vent hole formed in the mold. The vent hole is positioned to allow egress of air from the mold. The vent hole has an inside end and an outside end. The vent hole has a cross section that increases in area from the inside end to the outside end. The vent hole may have a shape of a trapezoidal prism, a truncated pyramid or a truncated cone; the cross section of the vent hole may be a rectangle. A preferred mold has three air vent holes at three corners of the mold. An integrated circuit is placed within the mold. A material to be molded is injected into the mold to encapsulate the integrated circuit. Mold cleaning is facilitated by the shape of the vent, and plastic flashes may be easily removed through the vent hole.
摘要:
A waterproof connector housing is provided. This waterproof connector housing includes a housing main body, a hood portion for engaging with a mating housing via a stair portion provided on the housing main body, an elastic seal ring for maintaining water-tightness with the mating housing inside the hood portion, and a holding portion for the elastic seal ring on the terminal insertion surface of the housing main body. With this waterproof connector housing, the elastic seal ring can be easily molded, and the amount of wasted raw material can be dramatically reduced. Also, the hood portion can take various forms and be made smaller.
摘要:
In one embodiment, a microreplication tool includes gas release features that allow gas to escape from microreplication cavities of the tool. The gas release features can be disposed at the bottoms of the respective cavities to avoid air entrapment within the cavities of the tool during the microreplication process. In this manner, the quality of the microreplicated product can be improved.
摘要:
A vulcanization mold is described for the manufacture of technical rubber products comprising a plurality of vent bores in which a blocking member is mounted which consists of a central body and a sealing part coupled to it which together form at least one angled flow path for air to be dissipated, with the central body being fixed in the vent bores, on the one hand, by clamping ribs provided at the central body and, on the other hand, by blocking elements which are formed at spring limbs of the sealing part.
摘要:
A mold assembly for producing a molded object from resin. The assembly includes a cavity configured to be filled with resin to form at least one surface of the molded object into a predetermined shape with at least one transfer surface of the cavity. A molding insertion member is arranged to form another surface of the molded object, and a holding insertion piece is configured to hold the molding insertion member. The holding insertion piece includes a communication path that places a surface of the molding insertion member at a side opposite to the cavity in fluid communication with the exterior of the mold assembly and guides air from the exterior of the mold assembly toward the surface of the molding insertion member.