GB1172052A - Vacuum-forming Apparatus for Forming Recesses in Thermoplastic Films - Google Patents

Vacuum-forming Apparatus for Forming Recesses in Thermoplastic Films

Info

Publication number
GB1172052A
GB1172052A GB392768A GB392768A GB1172052A GB 1172052 A GB1172052 A GB 1172052A GB 392768 A GB392768 A GB 392768A GB 392768 A GB392768 A GB 392768A GB 1172052 A GB1172052 A GB 1172052A
Authority
GB
United Kingdom
Prior art keywords
recesses
drum
slot
film
passageways
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.)
Expired
Application number
GB392768A
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.)
Hoefliger und Karg KG
Original Assignee
Hoefliger und Karg KG
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 Hoefliger und Karg KG filed Critical Hoefliger und Karg KG
Publication of GB1172052A publication Critical patent/GB1172052A/en
Expired 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
    • B29C51/225—Thermoforming apparatus having movable moulds or mould parts rotatable about an axis mounted on a vacuum drum

Landscapes

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

Abstract

1,172,052. Apparatus for forming recesses in thermoplastic films. O. HÍFLIGER, and R. KARG., [trading as HÍFLIGER & KARG]. 25 Jan., 1968 [25 Jan., 1967], No. 3927/68. Heading B5B. The peripheral surface of a rotatable metal drum 1 (Fig. 1) is provided with recesses 2 (Figs. 1 and 2) communicating via openings 6 with passageways 5. As the drum rotates the passageways 5 are periodically brought into communication with a slot 7 in a stationary ring 8 on which one end face of the drum slides and which communicates via a pipe 9 with a source of vacuum. In the same way the open ends of the passageways 5 periodically pass a slot 10 in the ring 8 which slot communicates via a pipe 11 with a source of pressurized air. The periphery of the drum is provided near its edges with a row of recesses 12 communicating via bores 13 with the passageways 5. The internal surface of the peripheral wall of the drum is provided with cooling fins 14. In operation the film 16 after being passed on to the peripheral surface of the drum passes through a zone 17 in which the film is heated to render it deformable. The film then passes over a portion of the peripheral surface of the drum in which the recesses 2 are in communication with the source of vacuum via the slot 7 whereby the portions of the film covering the recesses 2 are drawn into the recesses. At the same time the portions of the film covering the recesses 12 which are also in communication with the vacuum slot 7 is brought into air-tight engagement with the periphery of the drum and areas of the film covering the recesses 2 are drawn into the recesses and recesses are formed in the film Further rotation of the drum causes the deformed embossed portion of the film to leave the zone of the slot 7 and the embossed film is thereafter withdrawn from the drum. Thereafter the hot portion of the drum periphery moves through the zone of the slot 10 where the passageways 5 and recesses 2 are cooled by compressed air from the slot 10.
GB392768A 1967-01-25 1968-01-25 Vacuum-forming Apparatus for Forming Recesses in Thermoplastic Films Expired GB1172052A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH0061654 1967-01-25

Publications (1)

Publication Number Publication Date
GB1172052A true GB1172052A (en) 1969-11-26

Family

ID=7161497

Family Applications (1)

Application Number Title Priority Date Filing Date
GB392768A Expired GB1172052A (en) 1967-01-25 1968-01-25 Vacuum-forming Apparatus for Forming Recesses in Thermoplastic Films

Country Status (3)

Country Link
DE (1) DE1704095A1 (en)
FR (1) FR1551785A (en)
GB (1) GB1172052A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1555109A1 (en) * 2002-08-29 2005-07-20 Kawakami Sangyo Co., Ltd. Plastic sheet having a large number of recessed and protruded parts and double wall sheet having the plastic sheet

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100450872C (en) † 2001-01-31 2009-01-14 宝洁公司 Method and apparatus for forming films

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1555109A1 (en) * 2002-08-29 2005-07-20 Kawakami Sangyo Co., Ltd. Plastic sheet having a large number of recessed and protruded parts and double wall sheet having the plastic sheet
EP1555109A4 (en) * 2002-08-29 2007-03-07 Kawakami Sangyo Co Ltd Plastic sheet having a large number of recessed and protruded parts and double wall sheet having the plastic sheet

Also Published As

Publication number Publication date
FR1551785A (en) 1968-12-27
DE1704095A1 (en) 1971-04-22

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees