Patent ID: 6406283
Filing Date: 2002-06-18
Classification: B29C,D02J

Abstract:
A device for drawing a drawable thermoplastic resin material, comprising:a laterally long drawing tank; a first pressurizing medium tank and a first buffer medium tank adjacently disposed on an upstream side of said drawing tank; a second pressurizing medium tank and a second buffer medium tank adjacently disposed on a downstream side of said drawing tank; first and second upstream ports respectively connecting between said respective upstream side tanks adjacently disposed from said drawing tank; a third upstream port disposed on an upstream side of said first buffer medium tank; first and second downstream ports respectively connecting between said respective downstream side tanks adjacently disposed from said drawing tank; a third downstream port disposed on a downstream side of said second buffer medium tank; a pressurized steam supply unit and a drawing tank discharge unit respectively connected to said drawing tank; a pressurizing medium supply unit and a pressurizing medium discharge unit respectively connected to said first and second pressurizing medium tanks; a buffer medium supply unit and a buffer medium discharge unit connected to said first and second buffer medium tanks; and opening members each having an opening which is formed substantially in accordance with the sectional shape of a drawable material passing therethrough with a slight gap therebetween are disposed, with the center of said opening aligned, at said respective upstream and downstream ports, whereby a small amount of pressurizing medium is allowed to flow into said drawing tank and said first and second buffer medium tanks through said first and second upstream ports and said first and second downstream ports, and an undrawn material supplied from said third upstream port is introduced into said drawing tank into which pressurized steam is introduced and which is kept airtight, is drawn by said drawing tank and is led to said third downstream port for withdrawing.