FR2287980A1 - Film tensioning in continuous vacuum forming - using cords in grooves at edges of forming drum - Google Patents

Film tensioning in continuous vacuum forming - using cords in grooves at edges of forming drum

Info

Publication number
FR2287980A1
FR2287980A1 FR7531165A FR7531165A FR2287980A1 FR 2287980 A1 FR2287980 A1 FR 2287980A1 FR 7531165 A FR7531165 A FR 7531165A FR 7531165 A FR7531165 A FR 7531165A FR 2287980 A1 FR2287980 A1 FR 2287980A1
Authority
FR
France
Prior art keywords
film
grooves
edges
cord
continuous vacuum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7531165A
Other languages
French (fr)
Other versions
FR2287980B3 (en
Inventor
Peter Pietsch
Richard Schwind
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nagema VEB
Original Assignee
Nagema VEB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nagema VEB filed Critical Nagema VEB
Publication of FR2287980A1 publication Critical patent/FR2287980A1/en
Application granted granted Critical
Publication of FR2287980B3 publication Critical patent/FR2287980B3/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/18—Thermoforming apparatus
    • B29C51/20—Thermoforming apparatus having movable moulds or mould parts
    • B29C51/22—Thermoforming apparatus having movable moulds or mould parts rotatable about an axis

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Advancing Webs (AREA)

Abstract

A film tensioning device for continuous vacuum forming machine stretches the film by a cord running in grooves at the edges of a drum fitted with cavities, the grooves are slightly smaller than (cord diameter + 2 x film thickness), a pressure device presses the cord and film into the groove immediately behind the film feed point. The film does not slip and the cord has a long life.
FR7531165A 1974-10-14 1975-10-10 Film tensioning in continuous vacuum forming - using cords in grooves at edges of forming drum Granted FR2287980A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD181663A DD113716A1 (en) 1974-10-14 1974-10-14

Publications (2)

Publication Number Publication Date
FR2287980A1 true FR2287980A1 (en) 1976-05-14
FR2287980B3 FR2287980B3 (en) 1979-06-29

Family

ID=5497638

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7531165A Granted FR2287980A1 (en) 1974-10-14 1975-10-10 Film tensioning in continuous vacuum forming - using cords in grooves at edges of forming drum

Country Status (6)

Country Link
CH (1) CH589507A5 (en)
DD (1) DD113716A1 (en)
DE (1) DE2541630C2 (en)
FR (1) FR2287980A1 (en)
NL (1) NL7511544A (en)
SE (1) SE408031B (en)

Also Published As

Publication number Publication date
CH589507A5 (en) 1977-07-15
DE2541630C2 (en) 1983-03-17
SE7511427L (en) 1976-04-15
DD113716A1 (en) 1975-06-20
NL7511544A (en) 1976-04-20
SE408031B (en) 1979-05-14
DE2541630A1 (en) 1976-04-22
FR2287980B3 (en) 1979-06-29

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