ES380936A1 - Method and apparatus for the manufacture of hollow bodies from thermoplastic synthetic material by rotary fusing - Google Patents

Method and apparatus for the manufacture of hollow bodies from thermoplastic synthetic material by rotary fusing

Info

Publication number
ES380936A1
ES380936A1 ES380936A ES380936A ES380936A1 ES 380936 A1 ES380936 A1 ES 380936A1 ES 380936 A ES380936 A ES 380936A ES 380936 A ES380936 A ES 380936A ES 380936 A1 ES380936 A1 ES 380936A1
Authority
ES
Spain
Prior art keywords
mould
negative pressure
flanges
softener
during
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
ES380936A
Other languages
Spanish (es)
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19702015966 external-priority patent/DE2015966C/en
Application filed by Individual filed Critical Individual
Publication of ES380936A1 publication Critical patent/ES380936A1/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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0038—Moulds or cores; Details thereof or accessories therefor with sealing means or the like
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/006—Using vacuum
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/34—Component parts, details or accessories; Auxiliary operations
    • B29C41/50—Shaping under special conditions, e.g. vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2001/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2001/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as moulding material
    • B29K2001/08—Cellulose derivatives
    • B29K2001/12—Cellulose acetate

Landscapes

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

Abstract

In a method of rotationally moulding a synthetic thermoplastic material comprising a cellulose derivative and a softener, the mould is rotated about mutually inclined axes and the material therein is heated during the heating a negative pressure is produced in the mould and during the subsequent cooling phase an increase of pressure is produced by the introduction of an inert gas. An excess of softener over that required to produce the desired properties in the moulded article is added to the cellulose derivative and such excess is distilled from the mould during the heating phase. The mould may comprise hollow walled halves 1a, 1b for the passage therethrough of heated oil interconnected by flanges 3a, 3b a pipe 6 connects the mould cavity with a source of negative pressure via a rotary joint 7. The space between the flanges is connected to the same negative pressure source by a tube 10 leading from an annular groove 9 and connected to a negative pressure storer 11 connecting via a non-return valve 13 and a softener separator 14 with the pipe 6. The flanges are embraced by a sealing ring 5.
ES380936A 1970-04-03 1970-06-19 Method and apparatus for the manufacture of hollow bodies from thermoplastic synthetic material by rotary fusing Expired ES380936A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702015966 DE2015966C (en) 1970-04-03 Method and device for producing hollow bodies from thermoplastics, in particular from cellulose derivatives, by rotary melting

Publications (1)

Publication Number Publication Date
ES380936A1 true ES380936A1 (en) 1972-09-16

Family

ID=5767029

Family Applications (1)

Application Number Title Priority Date Filing Date
ES380936A Expired ES380936A1 (en) 1970-04-03 1970-06-19 Method and apparatus for the manufacture of hollow bodies from thermoplastic synthetic material by rotary fusing

Country Status (9)

Country Link
JP (1) JPS505750B1 (en)
AT (1) AT314823B (en)
BE (1) BE757080A (en)
CH (1) CH513705A (en)
ES (1) ES380936A1 (en)
FR (1) FR2065097A5 (en)
GB (1) GB1271785A (en)
NL (1) NL146083B (en)
SE (1) SE366495B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2110901A1 (en) * 1995-06-02 1998-02-16 Tecnologico Gaiker Asoc Centro Process for manufacturing hollow pieces of continuous leather (hide, skin) with an artificial onyx or marble effect

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2530211C2 (en) * 1975-07-07 1983-12-01 Elkamet-Werk Lahn-Kunststoff Gmbh, 3560 Biedenkopf Method and device for the production of hollow bodies from thermoplastic material by rotary melting
US6602452B2 (en) 2001-07-18 2003-08-05 Mcghan Medical Corporation Rotational molding of medical articles
AU2007205721B2 (en) * 2001-07-18 2008-10-02 Allergan, Inc. Rotational molding of medical articles
RU2011124178A (en) 2008-11-20 2012-12-27 Аллерган, Инк. METHOD FOR FORMING A SOFT SHELL FOR A FILLABLE FLOW IMPLANT MEDIA AND THE RELATED INSTALLATION
US9457398B2 (en) 2011-06-10 2016-10-04 Jean-Paul Ciardullo Spherical centrifuge
EP3285982A1 (en) * 2015-02-23 2018-02-28 SABIC Global Technologies B.V. Process for forming polymeric parts under vacuum conditions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2110901A1 (en) * 1995-06-02 1998-02-16 Tecnologico Gaiker Asoc Centro Process for manufacturing hollow pieces of continuous leather (hide, skin) with an artificial onyx or marble effect

Also Published As

Publication number Publication date
FR2065097A5 (en) 1971-07-23
NL146083B (en) 1975-06-16
SE366495B (en) 1974-04-29
DE2015966A1 (en) 1971-10-21
GB1271785A (en) 1972-04-26
CH513705A (en) 1971-10-15
AT314823B (en) 1974-04-25
BE757080A (en) 1971-03-16
DE2015966B2 (en) 1972-06-15
NL7012869A (en) 1971-10-05
JPS505750B1 (en) 1975-03-06

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