DE441022C - Mold for casting synthetic resins - Google Patents

Mold for casting synthetic resins

Info

Publication number
DE441022C
DE441022C DEB121002D DEB0121002D DE441022C DE 441022 C DE441022 C DE 441022C DE B121002 D DEB121002 D DE B121002D DE B0121002 D DEB0121002 D DE B0121002D DE 441022 C DE441022 C DE 441022C
Authority
DE
Germany
Prior art keywords
mold
synthetic resins
cardboard
casting synthetic
casting
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
DEB121002D
Other languages
German (de)
Inventor
Dr Ernst Elbel
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.)
Hexion Specialty Chemicals AG
Original Assignee
Bakelite AG
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 Bakelite AG filed Critical Bakelite AG
Priority to DEB121002D priority Critical patent/DE441022C/en
Application granted granted Critical
Publication of DE441022C publication Critical patent/DE441022C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/76Cores

Landscapes

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

Description

Form zum Gießen von Kunstharzen. Die vorliegende Form zum Gießen von Kunstharzen, wie Phenolfonnaldehydkondensationsprodukten, Harnstoffaldehydkondensationsprodukten u. dgl., bezweckt, spitz zulaufende Gegenstände, die einen hohlen, meist bis zum Boden sich erstreckenden Kern enthalten, durch Gießen der flüssigen Kondensationsprodukte herzustellen.Mold for casting synthetic resins. The present mold for casting Synthetic resins such as phenolic aldehyde condensation products, urea aldehyde condensation products and the like, aims at tapering objects that are hollow, usually up to the Soil containing the extending core by pouring the liquid condensation products to manufacture.

Die Form, die in der Zeichnung in Abb. i im senkrechten Schnitt, in Abb. a im Querschnitt dargestellt ist, besteht aus Pappe, zusLmrneagepreßtem Fasermaterial o.dgl. und ist aus zwei oder mehreren Kegeln, Kegelstumpfen, Pyramiden oder Ringen mit Hilfe eines an der Luft trocknenden und genügend hitzebeständigen Klebemittels zusammengesetzt. Die Form entspricht dadurch. in ihrer Gestalt dem herzustellenden Körper. Wenn man einen abgestumpften Kegel haben will, so ist die Form von der Gestalt eines abgestumpften Kegels a. Im Inneren der Form ist ein Kern beingesetzt, der so geformt ist, daß die innere Fläche der zu erzielenden Gestalt erhalten wird. Ist die innere Fläche bestimmt, parallel mit den äußeren Wandungen des abgestumpften Kegels zu verlaufen, so wird der Kern derartig geformt, daß sein Flächen mit den Wandungen des äußeren Gefäßes parallel verlaufen. Der innere Kern hat entweder die Form eines Kegels oder einer Pyramide, während die äußere Hülse einen Kegel- oder Pyramidensxumpf darstellt. Der Kern und der Mantel -der Form sind an der erweiterten Stelle mit einem Ring c mit Hilfe eines lufttrocknenden und hitzebeständigen Klebemittels miteinander wasserdicht verbunden. Der Ring liegt also zwischen der äußeren Fläche des inneren Kernes und der inneren Fläche des äußeren Mantels der Gießform.The shape shown in the drawing in Fig. I in vertical section, in Fig. A is shown in cross-section, consists of cardboard, pressed together fiber material or the like. and is made up of two or more cones, truncated cones, pyramids or rings with the help of an air-drying and sufficiently heat-resistant adhesive composed. The shape thus corresponds. in their form that to be produced Body. If one wants a truncated cone, the shape is of the shape of a truncated cone a. Inside the form there is a core that is is shaped so that the inner surface of the shape to be obtained is obtained. The inner surface is determined to be parallel with the outer walls of the truncated To run cone, the core is shaped such that its surfaces with the Walls of the outer vessel run parallel. The inner core has either that Shape of a cone or a pyramid, while the outer sleeve is a cone or Represents pyramid sump. The core and the mantle -of the form are at the expanded Place a ring c with the help of an air-drying and heat-resistant adhesive connected to each other in a watertight manner. So the ring lies between the outer surface the inner core and the inner surface of the outer shell of the mold.

Die Pappe, Papier, Faserstoffe o. dgl. müssen .geglättet (satiniert) sein, können aber Muster o. dgl. haben.The cardboard, paper, fibers or the like must be smoothed (satined) be, but can have patterns or the like.

Die Pappe usw. kann auch imprägniert sein; sie kann einen Überzug aus Metall in dünner Schicht, z. B. aufgeklebte Metallfolie o. dgl., haben. Sie läßt sich nach der Fertigstellung der Gegenstände leicht abdrehen oder durch Einlegen in Wasser abweichen.The cardboard etc. can also be impregnated; it can have a coating made of metal in a thin layer, e.g. B. glued metal foil o. The like. Have. she can be easily twisted off after completion of the objects or by inserting differ in water.

Die Benutzung der Form geschieht derartig, daß man von der- verjüngten Stelle aus die Kunstharzmasse eingießt, erkalten läßt und die Härtung bei gewöhnlichem, erhöhtem oder vermindertem Druck vornimmt. Das Gießen von der -erweiterten Stelle der Hülsen aus ist infolge der Dünnwandigkeit der Hohlkörper und der Zähflüssigkeit gießbarer Kunstharzmassen .nicht möglich.The form is used in such a way that one rejuvenates from the Pour the synthetic resin compound into place, cool lets and hardening under normal, increased or reduced pressure. The pouring of the -Expanded point of the sleeves is due to the thin walls of the hollow body and the viscosity of cast synthetic resin compounds .not possible.

Das Wesen der Erfindung besteht darin, daß die Formen aus einem genügend widerstandsfahigen Fasermaterial, wie Pappe, genügend hartem Papier, Karton oder anderen Fasern, die genügend glatt, am besten ratiniert sind, besteht. Es hat sich gezeigt, daß gerade die bei konischen Gegenständen mit einem hohlen Kern auftretende Schwierigkeit des Zusammenziehens beim Härten nicht in Ers scheinung tritt, weil die Pappe genügend nachgiebig ist.The essence of the invention is that the forms from one enough resistant fiber material, such as cardboard, sufficiently hard paper, cardboard or other fibers that are sufficiently smooth, best ratinated, is made up. It has shown that it is precisely that which occurs with conical objects with a hollow core Difficulty contracting during hardening does not appear because the cardboard is sufficiently flexible.

Metall- und Glaskörper, welche bisher zur Herstellung starkwandiger und zylindrisch verlaufender Hohlkörper bekannt sind, lassen sich nach dem bekannten Gießverfahren für zwei- oder mehrwandige Hohlformen für die vorliegenden konischen, am verjüngten Ende massiv- verlaufenden Hohlkörper nicht herstellen. Die einzeln zusammenzusetzenden Konusse.usw. müßten einzeln glegossen oder gedreht und auf umständliche und kostspielige Weise zusammengesetzt werden. Diese :Metall-und Glasformen wären außerdem wesentlich teurer als Papphülsen und besäßen nicht die erforderliche Maßhaltigkeit. Hinzukommt, daß sie nicht nachgiebig genug wären, um Sprünge durch die Kontraktion der Kunstharzmassen zu vermeiden.Metal and glass bodies, which were previously used for the production of thick-walled and cylindrically extending hollow bodies are known, can be according to the known Casting process for two- or multi-walled hollow molds for the present conical, Do not produce a solid hollow body at the tapered end. The individually cones to be assembled, etc. would have to be cast or rotated individually and on cumbersome and costly ways to be put together. These: metal and glass molds would be also much more expensive than cardboard tubes and do not have the required dimensional accuracy. In addition, they would not be resilient enough to allow jumps through contraction to avoid the synthetic resin compounds.

Claims (1)

PATENTANSPRUCI3: Form zum Gießen von Kunstharzen, dadurch gekennzeichnet, daß eine' konisch verlaufende Form mit am verjüngten Ende geschlossener Hohlform als innerem Kern aus geglättetem Fasermaterial, wie z. B. satirfierter, mit hitzebeständigem Klebstoff verbundener Pappe, besteht. . PATENT claim 3: Mold for casting synthetic resins, characterized in that a 'conical shape with a hollow shape closed at the tapered end as an inner core made of smoothed fiber material, such as. B. satirized cardboard connected with heat-resistant adhesive. .
DEB121002D 1925-07-29 1925-07-29 Mold for casting synthetic resins Expired DE441022C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB121002D DE441022C (en) 1925-07-29 1925-07-29 Mold for casting synthetic resins

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB121002D DE441022C (en) 1925-07-29 1925-07-29 Mold for casting synthetic resins

Publications (1)

Publication Number Publication Date
DE441022C true DE441022C (en) 1927-02-19

Family

ID=6995429

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB121002D Expired DE441022C (en) 1925-07-29 1925-07-29 Mold for casting synthetic resins

Country Status (1)

Country Link
DE (1) DE441022C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1229276B (en) * 1959-02-11 1966-11-24 M G Plastics Ltd Method for casting a cold-curing, solvent-free synthetic resin
US6857908B2 (en) 2002-01-28 2005-02-22 Gmbh & Co. Kg Connector with movable contact elements

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1229276B (en) * 1959-02-11 1966-11-24 M G Plastics Ltd Method for casting a cold-curing, solvent-free synthetic resin
US6857908B2 (en) 2002-01-28 2005-02-22 Gmbh & Co. Kg Connector with movable contact elements

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