DE2226179A1 - Metal mould for plastic foam - with removable metal mask of fluorinated polymer - Google Patents

Metal mould for plastic foam - with removable metal mask of fluorinated polymer

Info

Publication number
DE2226179A1
DE2226179A1 DE19722226179 DE2226179A DE2226179A1 DE 2226179 A1 DE2226179 A1 DE 2226179A1 DE 19722226179 DE19722226179 DE 19722226179 DE 2226179 A DE2226179 A DE 2226179A DE 2226179 A1 DE2226179 A1 DE 2226179A1
Authority
DE
Germany
Prior art keywords
mould
mask
insert
plastic foam
metal
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.)
Pending
Application number
DE19722226179
Other languages
German (de)
Inventor
Wilhelm Rudolf Eisenkolb
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.)
Saint Gobain Performance Plastics Pampus GmbH
Original Assignee
Pampus GmbH
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 Pampus GmbH filed Critical Pampus GmbH
Priority to DE19722226179 priority Critical patent/DE2226179A1/en
Priority to IT2115373A priority patent/IT981092B/en
Priority to CH466873A priority patent/CH556725A/en
Priority to NL7304562A priority patent/NL7304562A/xx
Priority to FR7313120A priority patent/FR2186335B1/fr
Priority to SE7305941A priority patent/SE392419B/en
Priority to GB2453773A priority patent/GB1420986A/en
Priority to BR384073A priority patent/BR7303840D0/en
Priority to JP6018973A priority patent/JPS4950066A/ja
Publication of DE2226179A1 publication Critical patent/DE2226179A1/en
Pending 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • 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
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/60—Releasing, lubricating or separating agents
    • B29C33/62—Releasing, lubricating or separating agents based on polymers or oligomers
    • 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
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • 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
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts

Abstract

The mould has a mould mask formed by a thick walled elastic insert of fluorinated ethylene/propylene copolymer, the side of the insert directed toward the material having the desired counter shape. Pref. the insert consists of a number of parts and is of PTFE and punched with a polished tool in a heated state, or of injection moulded polyfloroalkoxy material. The mask has the desired anti-adhesive props and enables the moulded plastic article to be easily removed from the mould without using mould lubricants. The mask is durable and can be used many times.

Description

Kunststoff-Schaumform aus Metall mit einer Formmaske Die vorliegende Erfindung bezieht sich auf Spritzformen aus antiadhäsivem Kunststoff zur Herstellung von Kunststoff-Schaumstoffteilen. Insbesondere bezieht sie sich auf Formen für Polyurethanschaum, Bekanntlich haften die meisten Kunststoffe nach dem Erstarren mehr oder weniger an der Formwandung. Um dies zu verhindern, werden die Formen nach jedem Arbeitszyklus mit einem Formtrennmittel besprüht oder gefettet. Bei manchen Fertigteilen stört das Trennmittel nicht. Es gibt jedoch auch Formteile, bei denen das meist ölige oder fettige Trennmittel nicht zulässig ist und deshalb wieder abgewaschen werden muß. Dies ist besonders schwierig bei Teilen aus Polyurethanschaum oder anderen Schaumstoffen.Plastic foam mold made of metal with a molding mask The present The invention relates to injection molds made of anti-adhesive plastic for manufacture of plastic foam parts. In particular, it relates to molds for polyurethane foam, It is well known that most plastics adhere to a greater or lesser extent after solidification on the mold wall. To prevent this from happening, the molds are removed after each work cycle sprayed or greased with a mold release agent. With some prefabricated parts bothers the release agent does not. However, there are also molded parts that are mostly oily or greasy release agents are not permitted and should therefore be washed off again got to. This is particularly difficult with parts made of polyurethane foam or others Foams.

Um das Verschmutzen der Teile und die damit notwendige Reinigung zu vermeiden, benutzt man Formmasken, die aus dünnem vorgeformtem Kunststoff bestehen. Dieser wird vor jedem Arbeitsgang in die Spritzformen eingelegt. Unmittelbar nach dem Erstarren kann das Fertigteil entformt werden, ohne daß die Gefahr besteht, daß es an der Form anhaftet und dadurch beim Herausnehmen beschädigt wird.To avoid dirtying the parts and the cleaning that is necessary with it avoid using shape masks made from thin preformed plastic exist. This is placed in the injection molds before each work step. Direct after solidification, the finished part can be removed from the mold without the risk of that it sticks to the mold and is damaged when it is removed.

Nach Fertigstellung des geschäumten Teiles reißt man die dünne Kunststoffmaske ab, die dabei zerstört wird.After completing the foamed part, tear the thin plastic mask which is destroyed in the process.

Das Ziel der Erfindung besteht nun darin, eine Formmaske für Dauerbenutzung zu schaffen.The aim of the invention is now to provide a molded mask for permanent use to accomplish.

Die Erfindung ermöglicht dies durch eine dickwandige elastische Einlage aus FEP, deren dem Werkstoff zugekehrte Seite dessen gewünschte Gegenkontur aufweist.The invention makes this possible through a thick-walled elastic insert made of FEP, the side of which facing the material has the desired mating contour.

Dies bedeutet, daß die Einlage gegebenenfalls innen eine andere Form oder eine andere Oberfläche aufweist als außen.This means that the insert may have a different shape on the inside or has a different surface than the outside.

So können zum Beisniel die sonst in der Farm vorhandenen Feinriffelungen zur Erzeugung von naturmaterial-ähnlichen Narbunzen des Fertigteiles nunmehr auf der Einlage angebracht werden.For example, the fine corrugations that are otherwise present in the farm can be used for the production of natural material-like grains of the finished part now on attached to the insert.

Die Erfindung ist anhand der Zeichnung schematisch veranschaulicht.The invention is illustrated schematically with reference to the drawing.

Darin ist ein Formunterteil mit 1 und ein Formoberteil mit 2 bezeichnet. Die Form dient der Herstellung einer konischen Buchse 3. In das Formunterteil ist eine Formeinlage 4 und in das Formoberteil eine Formeinlage 5 eingebracht.A lower mold part is designated by 1 and an upper mold part is designated by 2 therein. The mold is used to produce a conical socket 3. It is in the lower part of the mold a mold insert 4 and a mold insert 5 introduced into the upper mold part.

Nach dem SDritzvorgang wird die Buchse zusammen mit den Formeinlagen 4 und 5 entfernt. Nach dem völligen Erkalten werden die Formeinlagen von dem fertigen Teil 3 abgezogen und sind für eine Wiederbenutzung verfügbar. Der Werkstoff FEP für die Einlage läßt die verwendeten Eùnststoffe nicht anhaften, so daß die Entformung, selbst bei schwierigen Teilen mit Hinterschnitten, noch ohne die Zerstörung der Formeinlagen möglich ist.After the Scribing process, the socket is made together with the molded inserts 4 and 5 removed. After it has completely cooled down, the mold inserts are made from the finished product Part 3 peeled off and are available for reuse. The material FEP for the insert does not allow the plastics used to adhere, so that demolding, even with difficult parts with undercuts, without destroying the Form inserts is possible.

Claims (2)

P a t e n t a n s p r ü c h eP a t e n t a n s p r ü c h e 1. Kunststoff-Schaumform aus Metall oder anderem geeigneten Werkstoff mit einer Formmaske, gekennzeichnet durch eine dichwandige elastische Einlage aus FEP als Dauerformeinanlage, deren dem Werkstoff zugekehrte Seite dessen gewünschte Gegenkontur aufweist.1. Plastic foam mold made of metal or other suitable material with a preformed mask, characterized by a dichroic elastic insert FEP as a permanent molding machine, whose side facing the material is the desired one Has opposite contour. 2. Einlage nach Anspruch 1, dadurch gekennzeichnet, daß sie mehrteilig ist. 2. Insert according to claim 1, characterized in that it is in several parts is.
DE19722226179 1972-05-30 1972-05-30 Metal mould for plastic foam - with removable metal mask of fluorinated polymer Pending DE2226179A1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
DE19722226179 DE2226179A1 (en) 1972-05-30 1972-05-30 Metal mould for plastic foam - with removable metal mask of fluorinated polymer
IT2115373A IT981092B (en) 1972-05-30 1973-03-02 MOLD FOR SYNTHETIC RESIN FOAM CONSISTING OF A METAL WITH A SHELL SHAPE
CH466873A CH556725A (en) 1972-05-30 1973-04-01 PLASTIC FOAM MOLD MADE OF METAL WITH A MOLDING MASK.
NL7304562A NL7304562A (en) 1972-05-30 1973-04-02
FR7313120A FR2186335B1 (en) 1972-05-30 1973-04-11
SE7305941A SE392419B (en) 1972-05-30 1973-04-27 PLASTIC FOAM FOAM MOLD WITH A MOLD MASK
GB2453773A GB1420986A (en) 1972-05-30 1973-05-23 Mould for moulding foamed plastics
BR384073A BR7303840D0 (en) 1972-05-30 1973-05-24 MOLD FOR PLASTIC FOAM
JP6018973A JPS4950066A (en) 1972-05-30 1973-05-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722226179 DE2226179A1 (en) 1972-05-30 1972-05-30 Metal mould for plastic foam - with removable metal mask of fluorinated polymer

Publications (1)

Publication Number Publication Date
DE2226179A1 true DE2226179A1 (en) 1973-12-13

Family

ID=5846256

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19722226179 Pending DE2226179A1 (en) 1972-05-30 1972-05-30 Metal mould for plastic foam - with removable metal mask of fluorinated polymer

Country Status (1)

Country Link
DE (1) DE2226179A1 (en)

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