摘要:
A resin molding apparatus of a simplified structure is provided that offers high handling efficiency by a work robot, thereby improving a throughput. The resin molding apparatus (200) that retains a hollow molded body (10) including a closed-bottom cylindrical main body (12) and a cylindrical open neck portion (20), the open neck portion (20) including a helical ridge portion (22) formed on an outer circumferential surface thereof and divided into a plurality of helical segments by a slit (24) extending in an axial direction of the open neck portion (20), and that overmolds a resin sheathing body (30) on an outer surface of the main body (12), includes a first recess in which the open neck portion (20) is to be fitted, and a rib (216) formed on a circumferential surface of the recess so as to extend in a depthwise direction thereof, and to be engaged with the slit (24).
摘要:
In a method of manufacturing a synthetic resin hollow body for holding a fluid material, such as cosmetic solutions, chemicals and beverages, a hollow molding body is filled with cooled gas or cooled and pressurized gas during an overmolding step.
摘要:
A method of manufacturing a multi-layered plastic manifold (10) including molding an outer layer (22) of the manifold (10) about a blow molded core insert (20). The outer layer (22) is molded by either a thermoplastic injection molding process or a urethane casting process. While the outer layer (22) is being molded, the pressure and temperature within the core insert (20) are controlled to preserve the structural integrity of the core insert (20).
摘要:
A method of over-molding used to produce a three-dimensional hollow molded article employs a core made of resin having a hollow portion. The core is placed in a cavity of a mold. Molten resin is injected into a space formed by the core and a cavity wall of the mold through a resin injection portion. In this way at least part of the outer surface of the core is covered with resin. Deformation of the core due to the pressure of the resin during injection is prevented in one of a number of different ways. The over-molding method is optimized by calculating a temperature distribution and a pressure distribution of the molten resin in the step of injecting the molten resin into the space by numerical analysis. The displacement distribution and for the stress distribution of the core caused by pressure applied to the core by flow of the molten resin is calculated by a numerical analysis on the basis of the calculated temperature distribution and pressure distribution. The form of the hollow molded article, the form of the core, the form of the mold, and the molding conditions can thereby be optimized on the basis of at least one of the calculated displacement distribution and the stress distribution so as to minimize deformation of the core.
摘要:
This invention relates to a secondary molding machine capable of injection molding a handle, a base cup, or the like on a body portion, a bottom portion or the like of a thin-wall hollow container made of synthetic resin. The machine includes a rotational member provided movably up and down on a column on a machine bed, an insert mechanism including a lateral molded-product holding device mounted on the rotational member, a clamping mechanism for connecting an upper clamping plate, which is moved up and down for opening and closing the mold cavities to the rotational member, a secondary mold that is opened and closed up and down having the same first cavity as a hollow molded product and a secondary molding cavity. An air blowing device is connected to a blow core.
摘要:
A thermoplastic blown bottle with a handle comprises a bottle body with a concave portion at its upper circumferential part and a handle attached to the concave portion, wherein the handle has a grip portion in an elongated form, fitting parts extending laterally from the both ends of the grip portion, and projections extending outwardly from the end portion of the fitting parts to be engaged with the innermost part of the concave portion so as to fix the handle.
摘要:
A process for making an article having an irregular internal passage utilizes a hollow polymer preform. The preform is filled with a relatively incompressible filler material such as a powder or a fluid, which supports the preform when it is placed in a mold, e.g. an injection mold. The filler enables the preform to withstand high molding pressures and prevents deflection and movement of the internal passage within the preform. The shell, a layer of a polymer material is then molded about the preform. After the final article has been formed, consisting of the preform and shell, the filler is removed for possible reuse.
摘要:
A synthetic resin hollow body (A) that has a satisfactory decorating property and a satisfactory recycle property in a disposal and that is hardly damaged. In addition, a product cost and an operation cost thereof can be suppressed. The synthetic resin hollow body (A) includes: a hollow molding body (a) made of a resin, the hollow molding body (a) capable of holding a liquid material; and a resin sheathing body formed outside the hollow molding body (a) in an integrating manner with the hollow molding body (a), wherein the resin sheathing body is made of a highly transparent synthetic resin having a total ray transmittance of at least 80%.
摘要:
A manufacturing method of a synthetic resin hollow body in which a molten resin is injected for an over-molding outside a hollow molding body made of a resin provided with a hollow body and at least an opening portion to form a resin sheathing body in an integrating manner with the hollow molding body. The method includes the step of injecting the molten resin for an over-molding under the state in which the hollow molding body is partially or wholly filled with a fluid substance. The manufacturing method of a synthetic resin hollow body is capable of suppressing resin cost and operation cost and can improve decorating property.
摘要:
There is disclosed a manufacturing apparatus and method which are capable of smoothly removing a tripod boot integrated by secondary molding from a core without deforming the boot and which are superior in manufacturing efficiency and which are inexpensive, and a resin boot for a constant-velocity universal joint. The apparatus includes: divided molds which hold a primarily molded resin boot main body from the outside; a core which holds the boot main body from the inside; a runner mechanism which injects/charges a molten resin material into a secondary molding space formed between the core and an other-end annular fastening portion; and an ejection mechanism for removing the tripod boot in which portions having different thicknesses are integrally and secondarily molded on an inner periphery of the other-end annular fastening portion from the core. The ejection mechanism is provided with a plurality of ejectors in positions avoiding gates of the runner mechanism, and ejecting forces are applied onto lower end surface of the other-end annular fastening portion of the tripod boot from the ejectors to stably and smoothly remove the tripod boot from the core.