DE549039C - Process for the production of moldings from heat-plastic plastics by injection molding - Google Patents

Process for the production of moldings from heat-plastic plastics by injection molding

Info

Publication number
DE549039C
DE549039C DEJ27527D DEJ0027527D DE549039C DE 549039 C DE549039 C DE 549039C DE J27527 D DEJ27527 D DE J27527D DE J0027527 D DEJ0027527 D DE J0027527D DE 549039 C DE549039 C DE 549039C
Authority
DE
Germany
Prior art keywords
moldings
injection molding
production
heat
plastic plastics
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
DEJ27527D
Other languages
German (de)
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.)
JENALIT GmbH
Original Assignee
JENALIT 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 JENALIT GmbH filed Critical JENALIT GmbH
Priority to DEJ27527D priority Critical patent/DE549039C/en
Application granted granted Critical
Publication of DE549039C publication Critical patent/DE549039C/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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding

Description

Verfahren zur Herstellung von Formkörpern aus wärmeplastischen Kunststoffen durch Spritzguß . Die durch Spritzguß von Kunststoffen, die durch Erhitzen eine weiche, knetbare Form annehmen, in einer kalten oder heißen Form erhältlichen Formköiper zeigen, selbst wenn man dabei mit sehr hohen Spritzdrucken arbeitet, in den meisten Fällen eine nicht sehr hohe Dichte und vor allem keinen ausreichenden Hochglanz auf der Oberfläche. Hierfür kommen z. B. Asphaltmassen, Celluloseester, Kunsthorn, Kunstharze, Hartgummi usw. in Betracht.Process for the production of moldings from thermo-plastic plastics by injection molding. The injection molding of plastics made by heating a Take on soft, kneadable form, available in a cold or hot form show, even when working with very high injection pressures, in most of them Cases a not very high density and above all not a sufficient high gloss on the surface. For this come z. B. asphalt masses, cellulose esters, artificial horn, Synthetic resins, hard rubber, etc. into consideration.

Es wurde nun gefunden, daß man diese Mängel dadurch weitgehend beheben kann, daß man auf das in die Form gespritzte und somit schon unter Druck geformte Preßgut während seines Erstarrens einen zweiten, zusätzlichen Druck einwirken läßt, der zweckmäßig in anderer Richtung als der Spritzdruck verläuft.It has now been found that these deficiencies can largely be remedied in this way can that one is injected into the mold and thus already formed under pressure While the material to be pressed allows a second, additional pressure to act, which expediently runs in a different direction than the injection pressure.

Dies kann beispielsweise in der Weise geschehen, daß eine oder mehrere Wände der Preßform, in welche das Preßgut unter Druck eingepreßt wird, in Richtung auf die anderen verschiebbar angeordnet sind, und daß auf diese dann ein zweiter, zusätzlicher Preßdruck ausgeübt wird, wobei natürlich dafür Sorge getragen sein muß, daß vorher die Preßform allseitig vollständig abgeschlossen ist.This can be done, for example, in such a way that one or more Walls of the mold, into which the material to be pressed is pressed under pressure, in the direction are arranged to be displaceable on the other, and that on this then a second, additional pressure is exerted, of course, care must be taken must that the mold is completely completed on all sides beforehand.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Formkörpern aus wärmeplastischen Kunststoffen durch Spritzguß, dadurch gekennzeichnet, daß der noch plastische Preßkörper während seines Erstarrens in der allseitig geschlossenen Preßform einem zweiten, zweckmäßig in anderer Richtung als der Spritzdruck verlaufenden Preßdruck (Prägedruck) unterworfen wird. PATENT CLAIM: Process for the production of moldings from thermo-plastic plastics by injection molding, characterized in that the still plastic pressed body is subjected to a second pressing pressure (embossing pressure) expediently in a different direction than the injection pressure while it solidifies in the mold, which is closed on all sides.
DEJ27527D 1926-02-28 1926-02-28 Process for the production of moldings from heat-plastic plastics by injection molding Expired DE549039C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEJ27527D DE549039C (en) 1926-02-28 1926-02-28 Process for the production of moldings from heat-plastic plastics by injection molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEJ27527D DE549039C (en) 1926-02-28 1926-02-28 Process for the production of moldings from heat-plastic plastics by injection molding

Publications (1)

Publication Number Publication Date
DE549039C true DE549039C (en) 1932-04-22

Family

ID=7202992

Family Applications (1)

Application Number Title Priority Date Filing Date
DEJ27527D Expired DE549039C (en) 1926-02-28 1926-02-28 Process for the production of moldings from heat-plastic plastics by injection molding

Country Status (1)

Country Link
DE (1) DE549039C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1127579B (en) * 1960-01-09 1962-04-12 Ankerwerk Gebr Goller Process for operating an injection molding machine for the production of moldings from thermoplastics
DE1138210B (en) * 1959-10-21 1962-10-18 Ankerwerk Gebr Goller Process for the production of moldings from thermoplastics by means of injection molding machines
DE1160169B (en) * 1960-04-06 1963-12-27 Bayer Ag Process for the injection molding of thick-walled bodies made of thermoplastics
DE1236177B (en) * 1960-08-17 1967-03-09 Andre Strahm Process for the production of objects from thermoplastics
DE2438836A1 (en) * 1974-08-13 1976-03-04 Swarovski & Co METHOD FOR MANUFACTURING TAILOR-MADE MOLDED BODIES FROM PLASTIC MOLDABLE MASSES, IN PARTICULAR GLASS, AND DEVICE SUITABLE FOR IT

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1138210B (en) * 1959-10-21 1962-10-18 Ankerwerk Gebr Goller Process for the production of moldings from thermoplastics by means of injection molding machines
DE1127579B (en) * 1960-01-09 1962-04-12 Ankerwerk Gebr Goller Process for operating an injection molding machine for the production of moldings from thermoplastics
DE1160169B (en) * 1960-04-06 1963-12-27 Bayer Ag Process for the injection molding of thick-walled bodies made of thermoplastics
DE1236177B (en) * 1960-08-17 1967-03-09 Andre Strahm Process for the production of objects from thermoplastics
DE2438836A1 (en) * 1974-08-13 1976-03-04 Swarovski & Co METHOD FOR MANUFACTURING TAILOR-MADE MOLDED BODIES FROM PLASTIC MOLDABLE MASSES, IN PARTICULAR GLASS, AND DEVICE SUITABLE FOR IT

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