Abstract: The invention relate to the use of a multi-layer polypropylene film as an in-mold label used in a blow molding methods. According to the invention, the label film is laid inside the hollow mold of a blow molding machine, comprises an inner protective layer that faces the receptacle to be molded, and comprises an outer protective layer that is in contact with the hollow mold, whereby the inner protective layer has a roughness Rz of at least 3.5 ?m.

Abstract: This invention relates to the post-formation processing of extruded or injection molded profiles in an economic manner without the need to purchase a blow molding machine, yet still effect post-formation radial expansion or contraction by the application of sufficient degree of heat or the performing of the operation sufficiently quickly to permit the utilization of the retained latent heat from the extrusion or injection molding process.

Abstract: A method for stabilizing gravel, sand, crushed stone, rock and concrete structures which have cracks by injecting a pumpable, low viscous aqueous aerated concrete with a pore volume of at least 20% by volume into the cracks at a low pressure and then increasing the pressure so that the entrained air bubbles escape and sedimentation and hydration occur.

Abstract: An additive system for polyester polymers comprising an effective amount of (i) a fatty acid amide selected from the group consisting of oleyl palmitamide, ethylene bis stearamide, ethylene bis oleomide, and stearyl erucamide; (ii) a partially or fully calcined porous poly(methylsilsequioxane); and (iii) a stabilizer comprising a primary and a secondary antioxidant.

Abstract: A process for manufacturing hollow handled toothbrushes is disclosed. The process includes; a) providing a toothbrush mold having a head portion, a base portion, a toothbrush cavity located between said head and end portions and having walls, an injection port for molten plastic, and a gas injection port, wherein the gas injection port is positioned in the end of the base portion of the mold so that gas is injected into the mold cavity substantially centrally thereof and in a direction parallel to the longitudinal axis of the mold; b) injecting a predetermined amount of a molten plastic into the mold cavity to partially fill the cavity; and c) injecting at least one gas through the gas injection port into the cavity to direct the molten plastic against the walls of the mold cavity.

Abstract: In a method of manufacturing a rubber crawler through a first vulcanization step and a second vulcanization step using an upper mold, a middle mold and a lower mold, at least the middle mold is heated at each vulcanization step, and a vulcanizing circumferential length at the first vulcanization step is made longer than that at the second vulcanization step, and the second vulcanization step is carried out at a state that each end portion of the crawler part formed at the first vulcanization step is positioned by at least one pitch rate in each mold at the second vulcanization step and the distance between the upper and lower molds is made larger than that in the first vulcanization step.

Abstract: Solid state shear pulverization is utilized to form a compatibilized homogenous polymeric blend which has improved melt processing properties including a higher melt flow rate than the moldable base polymer without sacrificing, and often increasing the other physical properties including tensile strength, impact strength and elongation. The compatibilized, homogenous polymeric blend improves melt processing of the moldable polymer in injection molding, extrusion molding and blow molding, including the ability to down gauge blow molded films without sacrificing melt strength and the physical properties of the film.

Abstract: Process for manufacturing a plastic fuel tank from two shells formed by molding, which are joined together, at least one shell being produced by compression-molding a portion of a plastic sheet between a mold and a punch and by the remaining portion of the sheet being blow-molded in the region not compression-molded.

Abstract: The invention relates to a method for the production of a container (45″), with an opening (53), whose opening axis (57) is at an angle to the container axis (23), whereby a blank (45) is introduced into a blowing mould (11, 13), a fixing region (47) of the blank (45) pressed against a stop zone (41) on the blowing mould and the blank pneumatically formed in the blowing mould. The fixing region (47) of the blank (45) is pressed against a stop zone (41) on the blowing mould, inclined at an angle other than 90°. The moulding thus occurs such that an opening region axis (58) of the blank (45, 45′) is at an angle to the container region axis (59) of the blank (45, 45′). The opening axis (57), of the blowing mould (11), forms an angle to a longitudinal axis (51) of a stretching drift (49), which may be extended along the longitudinal axis thereof.

Abstract: A dimensionally-stable, injection-molded portion of a blow molded intermediate article is engaged by a conveyance mechanism of a trimmer to controllably drive the intermediate article within the trimmer to permit accurate and high speed severing of the injection molded portion and moil from a blown finish container body. An injection-molded, closed end preform is provided having a neck finish with an internal and/or external peripheral drive surface. The preform is utilized to form an intermediate article including a container body and moil. The injection-molded neck portion of the intermediate article remains substantially unchanged from its as-manufactured preform condition and provides a dimensionally stable surface for use in driving and rotating the intermediate article within the trimmer.

Abstract: Fuel system components for vehicles may be made from polyethylene components which are typically blow molded. To inhibit fuel vapour permeation, the polyethylene is often co-extruded into a parison with the parison comprising a barrier layer. Upon trimming flash or in the mold closure itself, the barrier layer may be ruptured. Sealing of areas of discontinuity in the fuel system component to inhibit hydrocarbon vapour pass through is achieved by sealing the area of barrier discontinuity with a sealing bead which has the necessary barrier properties. The barrier properties may be inherent in the sealing bead material or in a barrier layer extruded into the sealing bead.

Abstract: A blow molded article is disclosed. The blow molded article includes a body defining a cavity, and a wall integrally-formed with the body and defining at least in part, an enclosure. A method of making a blow molded article is also disclosed. The method comprises supplying a preform to a mold having a first cavity and a second cavity, the first cavity having a pin, closing the mold, supplying a fluid to the closed mold, expanding a first portion and a second portion of the preform around the pin, and contacting the first portion and the second portion to provide the enclosure.

Abstract: A hollow body is formed from several multi-layer plastic elements which are welded together and comprise a barrier layer that is a barrier to liquids and to gases. The elements form an appendage which extends from an outer surface of the hollow body, wherein the appendage comprises two multi-layer plastic layers, each of the two layers having a respective barrier layer. A method for manufacturing the hollow body includes using compression moulding in a multi-part mould comprising welding kerbs. When the mould is being closed, at least the barrier layers of the multi-layer plastic elements are forced to flow into a shallow slot formed between the welding kerbs of the closed mould. A multi-part compression-blow-moulding mould comprises welding kerbs which, when the mould is closed, form a slot or space between them with a height of cross section that decreases towards the outside of the mould and which is extended by a shallow and broad slot intended to compress the plastic.

Abstract: A method of manufacturing a vehicle pull handle assembly includes injection molding a pull strap portion in the first shot of a multi-shot molding process. The pull strap portion includes a first pivot joint member. A base is over-molded onto the pull strap portion in the second shot of the multi-shot molding process. The base includes a second pivot joint member which pivotally mates with the first pivot joint member but does not chemically bond with the first pivot joint member in the final molded pull handle assembly.

Abstract: A preblended additive composition and process for the preparation of polyester resins useful in the manufacture of plastic containers such as bottles is disclosed. The additive composition includes a cobalt-containing compound that is preblended with a phosphorous compound. The polyester resin, e.g., a PET resin, may be prepared by reacting ethylene glycol with dimethyl terephthalate (DMT) or terephthalic acid (TA) in an esterification reaction. The additive composition may be prepared by quickly dumping the phosphorus compound into the cobalt compound such as cobalt acetate, and the resulting composition is added to the reactor vessel before the polycondensation reaction. On the other hand, the additive composition may be prepared by slowly dumping the phosphorus compound into the cobalt compound over a period of at least 5 minutes. Such preblending substantially eliminates any yellow or blue color, or haze in the product article.

Abstract: A method and system for multiple-cavity gas-assisted plastic injection molding. Each of the mold cavities are oriented in the vertical direction with the valve gates for the plastic material being positioned at the lower vertical ends of the mold cavities. With four mold cavities, an “X”-shaped runner pattern is utilized, although an “H”-shaped pattern could also be utilized. The centerline of the manifold is offset from the centerline of the mold. Gas is injected through in-article gas pins positioned in the mold cavities. The direction of the melt front advance is vertical from the bottom of the mold cavities to the top of the cavities. The gas pin location is also at the gate end of the part, either at or forward of the gate or resin entry point.

Abstract: The invention relates to a process and apparatus for the forming of a hollow body. The process includes providing a forming mold comprising an upper mold and a lower mold which form a mold cavity having a cross-sectional contour in a closed state of the forming mold. The upper mold includes a roller. The hollow body is placed between the upper mold and the lower mold in an area of the mold cavity. The hollow body is preprofiled by moving at least one of the upper mold and the lower mold into the closed state at which time the roller comes into frictional contact with a surface of the hollow body running at an acute angle with respect to a direction of the movement of the at least one upper mold and lower mold. The preprofiled hollow body is then formed into a final shape corresponding to the cross-sectional contour of the forming mold by applying a hydraulic internal pressure into the preprofiled hollow body and expanding the hollow body while the upper mild and the lower mold are in the closed state.

Abstract: Provided are scratch-resistant blow moldings of crystalline resin having good surface gloss of at least 80% and high surface hardness of at least HB. A crystalline resin melt parison is blown in a blow mold into a blow-molded article, where the temperature of the inner wall of the mold falls between 20° C. lower than the crystallization temperature of the crystalline resin and 5° C. lower than the melting point of the crystalline resin; then, a pressure fluid is introduced into the pinched parison; then the mold is heated to a temperature lower by 10° C. than the melting point of the crystalline resin and a temperature below the melting point of the crystalline resin.

Abstract: A method of producing a dust cover assembly comprising the steps of: preparing a fixing member having a mounting bore to be fitted on a shock absorber's piston rod, and an engaging portion formed in its outer circumferential surface as an axially undercut portion; preparing a tubular parison having a large diameter portion at its one axial end portion; positioning the large diameter portion to be disposed radially outwardly of the outer circumferential surface of the fixing member; closing a blow mold to form a mold cavity around the parison and to hold the large diameter portion of the parison in close contact with the outer circumferential surface of the fixing member; and blow molding the parison by introducing a compressed gas into the blow mold through the mounting bore, thereby molding the dust cover. A dust cover assembly and a shock absorber equipped with the dust cover assembly are also disclosed.

Abstract: The method and the device are used for blow forming containers of a thermoplastic material. The preforms that are used are first temperature treated and then shaped into containers in the area of at least one blow station. Moulds to define the container shape are held by mould supports. At least two preforms are simultaneously shaped into containers within each blow station. Positioning of the preforms is done such that the preforms assume a positioning relative to one another when entering the blow station that differs from the positioning during the blow forming process. Spacing of the preforms relative to one another is changed during transport between entry into the blow station and blow positioning. In addition to this first change in spacing, a second change in spacing between adjacent preforms is performed relative to one another.