ES334682A1 - PROCEDURE AND CORRESPONDING EQUIPMENT FOR THE PRODUCTION OF POLYETETRAFLUOETHYLENE ARTICLES. - Google Patents

PROCEDURE AND CORRESPONDING EQUIPMENT FOR THE PRODUCTION OF POLYETETRAFLUOETHYLENE ARTICLES.

Info

Publication number
ES334682A1
ES334682A1 ES0334682A ES334682A ES334682A1 ES 334682 A1 ES334682 A1 ES 334682A1 ES 0334682 A ES0334682 A ES 0334682A ES 334682 A ES334682 A ES 334682A ES 334682 A1 ES334682 A1 ES 334682A1
Authority
ES
Spain
Prior art keywords
article
mold
production
molded article
articles
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
ES0334682A
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.)
Montedison SpA
Original Assignee
Montedison SpA
Montecatini Edison SpA
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 Montedison SpA, Montecatini Edison SpA filed Critical Montedison SpA
Publication of ES334682A1 publication Critical patent/ES334682A1/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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
    • B29C43/12—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material or using membranes contacting the moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/251—Particles, powder or granules

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

Process for the production of polytetrafluoroethylene articles, of the type consisting of feeding free-standing starting polymer, such as powder, granules and the like, or of continuous structure, such as lubricated paste, into a rigid mold, pressing it by known systems for obtaining a pre-molded article, subsequently extracting it and subjecting it to a sintering process to obtain the finished article, characterized in that after said pre-casting of the article in said mold a pressure equal to the pressure acting on the free surface of the article is restored; less in an area of the surface of said pre-molded article that is in contact with the inner surface of the body of the mold, thus obtaining a better extraction of said pre-molded article from the rigid mold. (Machine-translation by Google Translate, not legally binding)
ES0334682A 1965-12-04 1966-12-03 PROCEDURE AND CORRESPONDING EQUIPMENT FOR THE PRODUCTION OF POLYETETRAFLUOETHYLENE ARTICLES. Expired ES334682A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2710465 1965-12-04

Publications (1)

Publication Number Publication Date
ES334682A1 true ES334682A1 (en) 1967-12-01

Family

ID=11220956

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0334682A Expired ES334682A1 (en) 1965-12-04 1966-12-03 PROCEDURE AND CORRESPONDING EQUIPMENT FOR THE PRODUCTION OF POLYETETRAFLUOETHYLENE ARTICLES.

Country Status (4)

Country Link
BE (1) BE690494A (en)
CH (1) CH479645A (en)
ES (1) ES334682A1 (en)
LU (1) LU52476A1 (en)

Also Published As

Publication number Publication date
CH479645A (en) 1969-10-15
BE690494A (en) 1967-05-30
LU52476A1 (en) 1967-02-01

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