THERMAL MOLDING DEVICE AND THERMAL MOLDING METHOD

• Main Authors: SATO IKUE, MIZOGUCHI KENICHI, TANAKA TETSUJI, USAMI HIDEKI, TERAMOTO KAZUNORI, ISHIDA TATSUYA, YOSHIKAWA TOKUSHIRO
• Format: Patent
• Language: English; Japanese
• Published: 30.03.2017
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To provide a technology capable of suppressing reduction of a coating condition of a sheet and enhancing molding quality even in the case of a molding substrate with large elevation difference targeting a deep-draw molded article.SOLUTION: A substrate fixture 5 holds a molding substrate 2, a pressure reduction part for reducing pressure of a lower frame chamber 10A is arranged with a status for sandwiching a sheet edge 3a of a sheet 3 between a frame upper edge 10a of a lower frame 10 and a frame lower edge 20a of an upper frame 20, a control part 6 conducts contact heating on the sheet 3 sandwiched by the frame upper edge 10a and the frame lower edge 20a and then controls the sheet 3 to cover a surface of the molding substrate 2 by reducing pressure of the lower frame chamber 10A by the pressure reduction part and increasing the pressure without contacting a substrate fixture 5 and a hot plate 4 with each other.SELECTED DRAWING: Figure 1 【課題】深絞り成形品を対象とした高低差の大きな成形基材の場合であっても、シートの被覆状態が低下するのを抑え、成形品質の向上を図ることが可能な技術を提供する。【解決手段】基材治具５に成形基材２を保持し、下枠１０の枠上縁部１０ａと上枠２０の枠下縁部２０ａとの間にシート３のシート端縁３ａを挟持した状態で、下枠チャンバー１０Ａを減圧する減圧部が設けられ、制御部６は、枠上縁部１０ａと枠下縁部２０ａに挟持されたシート３に対して接触加熱を行い、その後、下枠チャンバー１０Ａを減圧部により減圧させ、基材治具５及び熱板４を互いに接触させないように上昇させることで、シート３を成形基材２の表面に被覆するように制御する。【選択図】図１