DE760048C - Method for pressing synthetic resin bodies - Google Patents
Method for pressing synthetic resin bodiesInfo
- Publication number
- DE760048C DE760048C DES142199D DES0142199D DE760048C DE 760048 C DE760048 C DE 760048C DE S142199 D DES142199 D DE S142199D DE S0142199 D DES0142199 D DE S0142199D DE 760048 C DE760048 C DE 760048C
- Authority
- DE
- Germany
- Prior art keywords
- synthetic resin
- pressing
- resin bodies
- pressing synthetic
- mold
- 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
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
- B29C33/68—Release sheets
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Paper (AREA)
Description
Beim Verpressen von Kunstharzkörpern, insbesondere solchen, die aus mit Phenolharz getränkten Faserstoffbahnen bestehen und bei denen das Pressen in heißem Zustand erfolgt, hat sich gezeigt, daß ein Ankleben der Kunstharzkörper an dem Formenteil kaum verhindert werden kann. Nian hat zu diesem Zweck den Kunstharzen bereits Fettstoffe, Wachse od. dgl. schon bei der Aufbereitung zugesetzt; jedoch war beim Verpressen der mit derart vorbehandeltem Kunstharz getränkten Faserstoffbahnen der geschilderte Nachteil nicht behoben. Auch das Einfetten der Formenteile mit Paraffin od. dgl. hatte nicht die gewünschte Wirkung gezeigt und sich außerdem, da ein genaues Bemessen der für das Lösen des Kunstharzkörpers von der Form gerade noch ausreichende Fettmenge nicht möglich ist, beim Härten der Kunststoffe nachteilig, insbesondere verzögernd, ausgewirkt. Aus dem gleichen Grund hatte sich auch das Aufspritzen eines Formenschmiermittels und das Aufbringen eines Cadmiumüberzuges auf die Preßflächen nicht bewährt. Schließlich hatte man auch nicht imprägnierte Saugpapiere zwischen dem eigentlichen Kunststoffkörper und dem betreffenden Formteil vorgesehen; aber auch diese Maßnahme konnte ein Ankleben des Kunstharzkörpers an den Formteil nicht hindern. When pressing synthetic resin bodies, especially those made from with phenolic resin impregnated fibrous webs and in which the pressing in takes place in a hot state, it has been shown that sticking of the synthetic resin body to the mold part can hardly be prevented. For this purpose, Nian made the synthetic resins already added fatty substances, waxes or the like during processing; However was during the pressing of the fibrous webs impregnated with synthetic resin pretreated in this way the disadvantage described not remedied. Also greasing the mold parts Paraffin or the like had not shown the desired effect and, moreover, because an accurate measurement of the straight for releasing the resin body from the mold a sufficient amount of grease is still not possible, disadvantageous when hardening the plastics, especially retarding. That was the same for the same reason Spraying a mold lubricant and applying a cadmium coating not proven on the pressing surfaces. After all, you hadn't impregnated either Absorbent papers between the actual plastic body and the relevant molded part intended; but even this measure could cause the synthetic resin body to stick to it do not obstruct the molding.
Alle diese Mängel werden bei dein Verfahren gemäß der Erfindung vermieden, welches darin besteht. daß zwischen dem Kunstharz und den Formteilen eine oder mehrere das Formeuschmiermittel enthaltende Faserstoffschichten angeordnet werden. All these shortcomings are avoided in the method according to the invention, which consists in it. that between the synthetic resin and the molded parts one or more the pulp layers containing the mold lubricant are arranged.
Versuche haben ergeben. daß beim Anwenden des erfindungsgemäßen Verfahrens ein Festkleben des Kunstharzkörpers an Formteilen nicht mehr stattfindet. Tests have shown. that when applying the method according to the invention sticking of the synthetic resin body to molded parts no longer takes place.
In der Zeichnung ist beispielsweise ein Kunststoff-Faserstoff-Körper dargestellt, der auf einer Seite Schichten gemäß der Erfindung hat. Die normalen Schichten des Runstharz-Faserstoff-Körpers sind mit 1 und 2 bezeichnet, die erfindungsgemäßen, das Formenschmiermittel enthaltenden Faserstoffschichten haben die Bezugsziffern 3 und 4 und verhindern während des Preßvorganges ein Ankleben des Kunstharzkörpers an den Formenteilen. Der Sunstharz-Faserstoft-Isörper sowie die erfindungsgemäßen Schmiermittel enthaltenden Faserstofflagen können entweder bereits als Einheit der Presse zugeführt oder in einzelnen Schichten in der Presse aufeinandergelegt werden, worauf erst das Schließen der Presse und deren Erllitzen erfolgt. In the drawing, for example, is a plastic fiber material body shown having layers according to the invention on one side. The normal ones Layers of the resin fiber body are denoted by 1 and 2, the invention, the pulp layers containing the mold lubricant have the reference numerals 3 and 4 and prevent the synthetic resin body from sticking during the pressing process on the mold parts. The synthetic resin fiber body as well as those according to the invention Fiber layers containing lubricant can either already be used as a unit of the Fed to the press or placed one on top of the other in the press in individual layers, whereupon the press is closed and the strands are made.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES142199D DE760048C (en) | 1940-09-08 | 1940-09-08 | Method for pressing synthetic resin bodies |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES142199D DE760048C (en) | 1940-09-08 | 1940-09-08 | Method for pressing synthetic resin bodies |
Publications (1)
Publication Number | Publication Date |
---|---|
DE760048C true DE760048C (en) | 1954-01-18 |
Family
ID=7541734
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES142199D Expired DE760048C (en) | 1940-09-08 | 1940-09-08 | Method for pressing synthetic resin bodies |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE760048C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2558632A (en) * | 1940-09-07 | 1951-06-26 | Semperit Ag | Process for forming bodies of artificial resin and fibrous material |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1529803A (en) * | 1922-12-02 | 1925-03-17 | Westinghouse Electric & Mfg Co | Cadmium-coated mold |
US2128534A (en) * | 1935-03-20 | 1938-08-30 | Plaskon Co Inc | Process for pressure molding |
-
1940
- 1940-09-08 DE DES142199D patent/DE760048C/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1529803A (en) * | 1922-12-02 | 1925-03-17 | Westinghouse Electric & Mfg Co | Cadmium-coated mold |
US2128534A (en) * | 1935-03-20 | 1938-08-30 | Plaskon Co Inc | Process for pressure molding |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2558632A (en) * | 1940-09-07 | 1951-06-26 | Semperit Ag | Process for forming bodies of artificial resin and fibrous material |
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