摘要:
The present invention relates to a multistage process for producing hollow plastic articles, encompassing the following steps: a) producing a tubular plastic parison by means of extrusion or coextrusion; b) cutting open the plastic parison to produce two planar-surface parts by separating the plastic melt with the aid of flow dividers arranged in the interior of the blow molding head; c) molding the planar-surface parts in two mold halves to give half shells (7), where a removable intermediate frame (8) separates the mold halves from one another at least along the peripheral edges, so that the semifinished products/half shells are not in contact with one another; d) opening the mold halves and removing the intermediate frame (8); e) closing the mold halves, with the result that the half shells (7) come into contact with one another along a peripheral rim; and f) bonding the half shells (7) to give a hollow article.
摘要:
The present invention provides a structure for clamping a built-in component (7A,7B,8) in a hollow container, the container being formed by clamp molding using a pair of a first mold piece (F) and a second mold piece (F), the first mold piece being for forming a first half of the container (Tc), the second mold piece being for forming a second half of the container (Tb), the structure comprising: a first support member secured (1A,1B) to an inner wall surface of the first half of the container (Tc) and having a first connection portion and a first clamp portion; a second support member (2A,2B) secured to an inner wall surface of the second half of the container (Tb) having a second connection portion and a second clamp portion, wherein the built-in component (7A,7B,8) is clamped between the first support member (1A,1B) and the second support member (2A,2B) with the first connection portion and the second connection portion coupled to each other.
摘要:
The present invention concerns an assembly method of the washing group (1) of a laundry washing machine comprising a washing tub (2) and a rotatable drum (3); the tub (2) comprises a rear half-shell (4) and a front half-shell (5) made of plastic and coupled one another in watertight manner, The method comprises: placing the rear half-shell (4) into a first supporting template (6), in a coupling position in which a perimetrical annular rim (4a) of the rear half-shell (4) is faced to the outside of first supporting template (6); fitting/inserting the drum (3) into the rear half-shell (4); placing the front half-shell (5) of the washing tub (2) into a second supporting template (7), in a coupling position in which a major annular rim (5a) of the front half-shell (5) is faced to the outside of the second supporting template (7); arranging the first (6) and second supporting templates (7) so as to put the perimetrical annular rim (4a) of the rear half-shell (4) in abutment against the major annular rim (5a) of the front half-shell (5). The method comprises, before starting a vibration welding process, the step/stage of measuring the starting distance (d1) between the front opening (3a) of the rotatable drum (3) and the minor annular rim (5b)/front opening of the front half-shell (5). The invention concerns also an assembly apparatus for assembly the washing group (1) of a laundry washing machine comprising a washing tub (2) and a rotatable drum (3); the apparatus comprises a first supporting template (6) for the rear half-shell (4) of the washing tub (2) and a second supporting template (7) for the front half-shell (5) of the washing tub (2). The assembly apparatus comprises a measuring device adapted for measuring the distance between the front opening (3a) of rotatable drum (3) and a minor annular rim (5b)/front opening (2a) of the washing tub 2.
摘要:
A method for making a polymeric microfluidic structure in which two or more components (layers) of the microfluidic structure are fixedly bonded or laminated with a weak solvent bonding agent, particularly acetonitrile or a mixture of acetonitrile and alcohol. In an aspect, acetonitrile can be used as a weak solvent bonding agent to enclose a microstructure fabricated in or on a non-elastomeric polymer such as polystyrene, polycarbonate, acrylic or other linear polymer to form a three-dimensional microfluidic network. The method involves the steps of wetting at least one of the opposing surfaces of the polymeric substrate components with the weak solvent bonding agent in a given, lower temperature range, adjacently contacting the opposing surfaces, and thermally activating the bonding agent at a higher temperature than the lower temperature range for a given period of time. The contacted polymeric substrates may also be aligned prior to thermal activation and compressed during thermal activation. A laminated, polymeric microfluidic structure is also disclosed.
摘要:
The invention provides a method of manufacturing a spar (1) for a wind turbine blade steps of providing at least two caps (2a, 2b), each cap forming an intermediate portion (4) between two end portions (5), where the end portions each forms a cap joint surface portion (6) along a longitudinal extending edge of the end portion and the intermediate portion forms an outer surface portion (7) of the spar, providing at least two webs (3a, 3b), each web being provided with web joint surface portions (8) along opposite and longitudinally extending edges, and connecting the joint surface portions of the caps with the joint surface portions of the webs to form a tubular configuration of the spar. The at least two caps are configured for attachment to a blade shell so that the intermediate portion of one of the caps faces towards or forms part of a windward surface of the blade and the other one of the caps faces towards or forms part of a leeward surface of the blade.