A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
MOLDING METHOD OF SOFT VINYL CHLORIDE RESIN SHEET
To provide a method for stretch-forming a peripheral edge part of an opening of a soft vinyl chloride resin sheet without causing defects.SOLUTION: A sheet 10 is formed by embedding a reinforcing fiber layer in a soft vinyl chloride resin. When an opening peripheral part 17A of the sheet 10 is formed by stretch-forming, in a setting step, between a lower mold 20 (first mold) having a mold recessed part 21 and an upper mold 30 (second mold) having a mold convex part 31 a seat 10 is set. In a heating step, a surface of a back side of the sheet 10 is heated by the heated lower mold 20, and a surface of a front side of the sheet 10 is heated by the heated upper mold 30. In a stretch-forming step, by bringing the upper mold 30 closer to the lower mold 20 and allowing the mold convex part 31 to enter the mold recessed part 21, the opening peripheral part 17A of the sheet 10 is stretched into a short cylindrical shape. In the heating step and the stretch-forming step, a surface of a front side of the sheet 10 is heated by the upper mold 30 at 50 to 80°C, and a surface of a back side of the sheet 10 is heated by the lower mold 20 at 50 to 100°C.SELECTED DRAWING: Figure 5
【課題】欠陥を生じることなく軟質塩化ビニル樹脂製シートの開口周縁部を絞り成形する方法の提供。【解決手段】シート１０は、軟質塩化ビニル樹脂に補強繊維層を埋め込むことにより構成されている。シート１０の開口周縁部１７Ａを絞り成形する際、セット工程で、成形凹部２１を有する下型２０（第１型）と、成形凸部３１を有する上型３０（第２型）との間にシート１０をセットし。加熱工程では、加熱された下型２０でシート１０の裏側の面を、加熱された上型３０でシート１０の表側の面を加熱する。絞り成形工程では、下型２０に対して上型３０を接近させて成形凸部３１を成形凹部２１に入り込ませることにより、シート１０の開口周縁部１７Ａを絞り成形して短筒形状にし、加熱工程および絞り成形工程において、シート１０の表側の面を上型３０により５０〜８０℃で加熱し、シート１０の裏側の面を下型２０により５０〜１００℃で加熱する。【選択図】図５
MOLDING METHOD OF SOFT VINYL CHLORIDE RESIN SHEET
To provide a method for stretch-forming a peripheral edge part of an opening of a soft vinyl chloride resin sheet without causing defects.SOLUTION: A sheet 10 is formed by embedding a reinforcing fiber layer in a soft vinyl chloride resin. When an opening peripheral part 17A of the sheet 10 is formed by stretch-forming, in a setting step, between a lower mold 20 (first mold) having a mold recessed part 21 and an upper mold 30 (second mold) having a mold convex part 31 a seat 10 is set. In a heating step, a surface of a back side of the sheet 10 is heated by the heated lower mold 20, and a surface of a front side of the sheet 10 is heated by the heated upper mold 30. In a stretch-forming step, by bringing the upper mold 30 closer to the lower mold 20 and allowing the mold convex part 31 to enter the mold recessed part 21, the opening peripheral part 17A of the sheet 10 is stretched into a short cylindrical shape. In the heating step and the stretch-forming step, a surface of a front side of the sheet 10 is heated by the upper mold 30 at 50 to 80°C, and a surface of a back side of the sheet 10 is heated by the lower mold 20 at 50 to 100°C.SELECTED DRAWING: Figure 5
【課題】欠陥を生じることなく軟質塩化ビニル樹脂製シートの開口周縁部を絞り成形する方法の提供。【解決手段】シート１０は、軟質塩化ビニル樹脂に補強繊維層を埋め込むことにより構成されている。シート１０の開口周縁部１７Ａを絞り成形する際、セット工程で、成形凹部２１を有する下型２０（第１型）と、成形凸部３１を有する上型３０（第２型）との間にシート１０をセットし。加熱工程では、加熱された下型２０でシート１０の裏側の面を、加熱された上型３０でシート１０の表側の面を加熱する。絞り成形工程では、下型２０に対して上型３０を接近させて成形凸部３１を成形凹部２１に入り込ませることにより、シート１０の開口周縁部１７Ａを絞り成形して短筒形状にし、加熱工程および絞り成形工程において、シート１０の表側の面を上型３０により５０〜８０℃で加熱し、シート１０の裏側の面を下型２０により５０〜１００℃で加熱する。【選択図】図５
MOLDING METHOD OF SOFT VINYL CHLORIDE RESIN SHEET
軟質塩化ビニル樹脂製シートの成形方法
SAKAMOTO NAOKI (author)
2019-01-24
Patent
Electronic Resource
Japanese
| European Patent Office | 2021
VINYL CHLORIDE RESIN PIPE AND METHOD FOR CONSTRUCTING VINYL CHLORIDE RESIN PIPE
| European Patent Office | 2021
| European Patent Office | 2024
| European Patent Office | 2018
| European Patent Office | 2018