摘要:
Method for shaping a film/sheet, particularly for making three-dimensional shapes in it, in which case the outlines of the shape to be formed are warmed/heated and the film/sheet is stretched along the heated outline, in order to cause the part of the film/sheet inside it to deviate from the plane of the surface. The heated outlines are created by, for example, directing a moving beam of thermal radiation onto it. A countersurface is provided to limit the stretching and ensure that rupture does not occur. By repeating the procedure sequentially, a great variety of shapes may be created.
摘要:
The present disclosure is concerned with improving the appearance of graphics printed on a flexible polymer film which is subsequently heated to a forming temperature and then drawn into a mold to form a cavity adapted for the packaging of an item, typically a food item. The improvement is effected by reducing the heat transfer to the portions of the film carrying the graphics thereby reducing the formability of these portions so that they stretch less than the rest of the film which is drawn into the mold. Typically the film is heated by contact with a heated platen. In such cases the reduced heat transfer can be effected by having zones of a cooler temperature which are adapted to be in registry with the portions of the film carrying the graphics or by covering the portions of the heated platen in registry with these graphics with an insulating material such as Teflon tape. The mouth of the cavity can then be closed by sealing to another flexible polymeric film. If the films used are heat shrinkable, the sealed package can be subjected to thermal conditions which cause it to shrink about the packaged item.
摘要:
Apparatus and methods of forming selected portions of integral sheets of material are disclosed. Unformed portions of the sheets may remain undistorted during the forming process, allowing them to contain text, art work, or other desired information without material risk of the information being degraded or becoming unintelligible during the forming process. This result may be accomplished, moreover, with less trim than usually occurs in conventional forming processes.
摘要:
A method and system for thermal forming an object. A mold is provided, a shape of which corresponds to a desired shape of the object. A material is inserted into a heating area, and the material is heated using a plurality of independently controllable heat sources that heat different areas of the material. The heated material is then disposed over or into at least a portion of the mold so as to deform the material. The deformed material may then be trimmed so as to form the object.
摘要:
A face shield comprising a contoured visor with three-dimensional structures with varying angles along multiple axes for improved protection and user comfort, an adjustable attachment member for easy user adjustment, and head contact area with improved ventilation. Methods of producing optically clear three-dimensional plastic structures with varying angles along multiple axes and tools for said method.
摘要:
A method is provided for manufacturing a conical-shaped cover device from a transparent, thermally deformable sheet material. The method includes supporting the sheet material about a peripheral base portion of the conical-shaped cover device to be formed. The base portion substantially encloses an interior region thereof. This region is heated to a deformable condition that enables deformability thereof. At least one of a central portion of the interior region and the base portion of the conical shaped device is urged in a direction opposite one another, generally along the longitudinal axis of the conical-shaped cover device. A non-contacted conical intermediate portion of the conical shaped cover, between the central portion and the base portion, is formed in a manner that substantially preserves the optical and/or surface finish properties of the sheet material without the need for secondary processing thereof.
摘要:
An equipment for making a surface finish of a bra includes a conical first mold, a second mold having a hole to allow extension of the first mold, a textile sandwiched between the first mold and the second mold and a temperature controller to control the sections of the first mold to respectively have a specific temperature. The textile is able to have different elastic coefficients after the first mold in inserted into the hole of the second mold and the actuation of the heaters of the first mold by the controlling buttons of the temperature controller. Therefore, the surface finish from the textile is able to cope with different curvatures of the bra when stitched onto the bra.
摘要:
A reclosable container includes a container having an opening defined by a rim, a reclosable lid having a rim-engaging portion and a recessed portion inwardly of the rim-engaging portion, and a sealing sheet material separate from the lid, the sealing sheet material extending across the opening and being removably secured to the container rim beneath the lid, wherein the recessed portion of the lid projects into the container opening and the sealing sheet material has a recessed portion which accommodates the recessed portion of the lid.
摘要:
A thermoformer, which produces zero scrap during the heating, forming and cutting of a blister package uses a precut roll having a series of adjacent webs connected by a cut area. Each of the webs are defined by an overall length L, a width W, and a radius R. Each of the cut areas are defined by a cut depth D1, said cut depth D1 being in the range of about 25% to 90% of the width W of the webs. The thermoformer further comprises a heating station adapted to heat each of the webs, a forming station adapted to form each of the webs, and a cutting station adapted to separate the webs from each other, by making a cut along each of the cut areas connecting the webs.
摘要:
A method and apparatus for thermoforming 3-dimensional articles of chosen wall thickness dimensions from a polar polymer sheet. The polymer sheet is dielectrically heated, the heating being controlled to impress a predetermined thermal pattern on the sheet. The thermal pattern is selected in accordance with the amount of stretching to which each area of the sheet is subjected during the subsequent work-forming step, the areas subjected to greater stretching being heated to a lower temperature and vice versa. Thus, the stretching action is balanced and results in accurate control of the wall thickness of the final article.