Manufacture of molding

Abstract

Abstract PURPOSE:To prevent wrinkles from occurring, and to make it possible to produce a molding having an appearance good in decorative property, by performing sizing in such a way that a material having a surface tension lower than water is present on a surface of a molded item. CONSTITUTION:An elongate material 3 including an aluminium foil 3a, a colored resin film 3b, etc. is sent out, is heated by a heater 4, and is supplied to an extruder 5, and a melted resin is extruded from an extruder 6 to form an item 8 having a resin section 7. The item 8 is introduced into a sizing tank 17 where a material 20 having a surface tension lower than water such active agent is supplied onto the surface of the item 8 from a liquid supplying apparatus 19, and it is supplied to a sizing apparatus 10. In the sizing apparatus 10, during the passage thereof rectified and cooled by the cooling action and lubricating action of the material 20 jetted from the liquid supplying holes 11. In this case, as the material 20 has a surface tension lower than water, it penetrates all the contact surface between the item 8 and the sizing apparatus 10, and the item 8 comes in contact uniformly with all the inner surface of the sizing apparatus 10 and would not engage with the inner wall of the liquid supply holes 11.

Inventors

• 👤 Masao Nagana
• 👤 永名　正男
• 👤 Makoto Fujisaki
• 👤 藤崎　真
• 👤 Hiroyuki Nakajima
• 👤 宏之 中島

Bibliographic Details