DE1296340B - Process for processing cold-curing casting resins - Google Patents

Process for processing cold-curing casting resins

Info

Publication number
DE1296340B
DE1296340B DE1963L0044974 DEL0044974A DE1296340B DE 1296340 B DE1296340 B DE 1296340B DE 1963L0044974 DE1963L0044974 DE 1963L0044974 DE L0044974 A DEL0044974 A DE L0044974A DE 1296340 B DE1296340 B DE 1296340B
Authority
DE
Germany
Prior art keywords
casting resins
curing
resin
processing cold
objects
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
DE1963L0044974
Other languages
German (de)
Inventor
Dr-Ing Edmar
Sperling Klaus
Strauss
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs 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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE1963L0044974 priority Critical patent/DE1296340B/en
Publication of DE1296340B publication Critical patent/DE1296340B/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
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/22—Component parts, details or accessories; Auxiliary operations
    • B29C39/38—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/04—Conditioning or physical treatment of the material to be shaped by cooling
    • 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
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/003—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor characterised by the choice of material
    • B29C39/006—Monomers or prepolymers
    • 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
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles

Description

Die Erfindung bezieht sich auf eine Verbesserung bei der Verarbeitung kalthärtender Gießharze. Es ist bekannt, Gegenstände aus kalthärtendem Gießharz herzustellen, indem man dieses in die passenden Formen gießt und anschließend aushärten läßt. Dabei ist es häufig nachteilig, daß das kalthärtende Gießharz eine relativ hohe Viskosität aufweist und nicht ohne weiteres sehr enge Querschnitte in den Formen ausfüllt. Man hat deshalb schon die bekannte Eigenschaft der kalthärtenden Gießharze, bei Temperaturerhöhung dünnflüssiger zu werden, ausgenutzt und vorgewärmtes Gießharz in Formen gegossen. Dieser Ausweg läßt sich aber praktisch nur bei relativ kleinen Harzmengen ausnutzen, da sich bei großen Harzmengen wegen der beim Vorwärmen einsetzenden exothermen Härtungsreaktion eine zu starke Wärmeabgabe und Temperatursteigerung ergibt, wodurch die Topfzeit stark herabgesetzt wird. Es wurde außerdem vorgeschlagen, daß zur Abfuhr der aufgenommenen Luftfeuchtigkeit von der Form bzw. den zu umgießenden Gegenständen vorgewärmte Luft verwendet werden kann. Gleichzeitig wird aber dabei vor einer zu starken Wärmeeinwirkung gewarnt, da sonst das Gießharz zu schnell aushärten könne und gegebenenfalls keine Zeit zur vollständigen Ausfüllung der Form verbleiben würde. The invention relates to an improvement in processing cold-curing casting resins. It is known, objects made of cold-curing cast resin by pouring it into the appropriate molds and then hardening it leaves. It is often disadvantageous that the cold-curing casting resin is a relatively has high viscosity and does not readily have very narrow cross-sections in the molds fills out. One therefore already has the well-known property of cold-curing casting resins, to become thinner when the temperature rises, exploited and preheated casting resin poured into molds. This way out is practically only possible with relatively small ones Make use of the amount of resin, since large amounts of resin will occur during preheating exothermic hardening reaction, excessive heat dissipation and temperature increase results, whereby the pot life is greatly reduced. It was also suggested that that to dissipate the absorbed humidity from the mold or to be encapsulated Objects preheated air can be used. But at the same time it is warned against excessive heat exposure, otherwise the casting resin will harden too quickly and possibly no time to complete the form would.

Das Verfahren zur Verarbeitung kalthärtender Gießharze, bei dem die Formen und/oder die zu umgießenden Gegenstände vor dem Vergießen vorgewärmt werden, hilft hier erfindungsgemäß dadurch, daß zum Vergießen auf Vorrat gehaltene, fertig angesetzte und unterkühlte Gießharze verwendet werden. The process for processing cold-curing casting resins in which the Molds and / or the objects to be encapsulated are preheated prior to encapsulation, helps here according to the invention in that kept in stock for potting, ready prepared and supercooled casting resins are used.

Das Gießharz wird also bei einer Temperatur, die unter Zimmertemperatur liegt, also bei untemormaler Temperatur auf Vorrat gehalten; dadurch ist beim Vergießen eine ausreichend lange Topfzeit, also kein vorzeitiges Eindicken, gewährleistet und die ge- wünschte Verarbeitungszeit gesichert. Gleichwohl sind die eingangs genannten Nachteile überwunden.The casting resin is therefore at a temperature below room temperature is, so kept in stock at below normal temperature; this is when potting a sufficiently long pot life, i.e. no premature thickening, is guaranteed and the Desired processing time secured. Nonetheless, the ones mentioned at the beginning are Disadvantages overcome.

Wenn die Formen bzw. die zu umgießenden Gegenstände eine geringe Wärmekapazität aufweisen, werden sie zweckmäßig höher vorgewärmt als in den Fällen, wo ihre Wärmekapazität größere Werte erreicht. Es kommt vor allem darauf an, daß das in die Formen hineingegossene Harz mindestens eine Temperatur und dadurch Viskosität erreicht, die ein Ausfüllen auch der engsten jeweils vorliegenden Querschnittsstellen durch das Harz gestattet. Nach oben ist die Temperatur nur dadurch begrenzt, daß ein zu schnelles Aushärten natürlich nicht eintreten darf.When the molds or the objects to be encapsulated have a low heat capacity have, they are expediently preheated higher than in cases where their heat capacity higher values achieved. What matters most is that what is poured into the molds Resin reaches at least a temperature and thereby viscosity that a filling even the narrowest cross-sectional points present in each case through the resin. The upper temperature is only limited by the fact that curing is too rapid of course not allowed to occur.

Die Aushärtungsvorgänge machen sich durch einen erneuten Anstieg der Viskosität bemerkbar. Die Vorwärmung der Formen und gegebenenfalls auch der zu umgießenden Gegenstände wird daher vorzugsweise darauf abgestellt, dem Gießharz eine Temperatur zu vermitteln, bei der das Gießharz am dünnflüs sigsten ist.The hardening processes make themselves through a renewed increase in Viscosity noticeable. The preheating of the molds and, if necessary, those to be cast around Objects is therefore preferably placed on the casting resin a temperature to convey where the casting resin is the thinnest.

Claims (2)

Patentansprüche: 1. Verfahren zur Verarbeitung kalthärtender Gießharze, bei dem die Formen und/oder die zu umgießenden Gegenstände vor dem Vergießen vorgewärmt werden, dadurch gek e n n -z e i c h n e t, daß zum Vergießen auf Vorrat gehaltene, fertig angesetzte und unterkühlte Gießharze verwendet werden. Claims: 1. Process for processing cold-curing casting resins, in which the molds and / or the objects to be encapsulated are preheated prior to encapsulation are marked by the fact that they are kept in stock for potting, ready-made and supercooled casting resins can be used. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Formen und/oder die zu umgießenden Gegenstände in Abhängigkeit ihrer Wärmekapazität so vorgewärmt werden, daß die gespeicherte Wärme dem unterkühlten Gießharz genau die Temperatur vermittelt, bei der das Gießharz am dünnflüssigsten ist. 2. The method according to claim 1, characterized in that the forms and / or the objects to be encapsulated as a function of their heat capacity be preheated so that the stored heat is exactly the supercooled cast resin Conveyed the temperature at which the casting resin is the thinnest.
DE1963L0044974 1963-05-28 1963-05-28 Process for processing cold-curing casting resins Pending DE1296340B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1963L0044974 DE1296340B (en) 1963-05-28 1963-05-28 Process for processing cold-curing casting resins

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1963L0044974 DE1296340B (en) 1963-05-28 1963-05-28 Process for processing cold-curing casting resins

Publications (1)

Publication Number Publication Date
DE1296340B true DE1296340B (en) 1969-05-29

Family

ID=7270914

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1963L0044974 Pending DE1296340B (en) 1963-05-28 1963-05-28 Process for processing cold-curing casting resins

Country Status (1)

Country Link
DE (1) DE1296340B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070223A1 (en) * 2001-03-07 2002-09-12 Globevision Pte Ltd Decorative ornaments

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2862239A (en) * 1955-10-25 1958-12-02 Bristol Aircraft Ltd Injection moulding processes and apparatus therefor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2862239A (en) * 1955-10-25 1958-12-02 Bristol Aircraft Ltd Injection moulding processes and apparatus therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070223A1 (en) * 2001-03-07 2002-09-12 Globevision Pte Ltd Decorative ornaments

Similar Documents

Publication Publication Date Title
DE1296340B (en) Process for processing cold-curing casting resins
CH348803A (en) Multi-pane window insert
DE5C (en) Attachment of wheel tires to railway wheels
DE3928111A1 (en) METHOD FOR MANUFACTURING BRAKE DISCS
DE1162998B (en) Process for the production of cast resin bodies from low-pressure resins
AT247493B (en) Molded part for stamping soap and method of manufacture
AT163451B (en) Device for preventing plaster wall rupture during the pressing process of denture manufacture
DE8033152U1 (en) Machine parts, in particular machine stands for machine tools
DE958639C (en) Method and device for the production of steam-hardened structural bodies from lightweight concrete or the like, in which the mass is formed into larger units in molds and divided after stiffening
DE743598C (en) Process for the production of dentures from synthetic resin
AT312230B (en) Precast concrete part
DE494191C (en) Device for casting letters with printed images, some of which protrude beyond the body of the letter
DE1259024B (en) Foundry model with loose parts, especially for machine molding
DE576086C (en) Block shape with embedded reinforcement insert
DE541863C (en) Method and device for the production of composite cast blocks
DE906996C (en) Low-resin synthetic resin molding compound
CH639311A5 (en) Process for producing mouldings from plastics
CH349408A (en) Process for the production of permanent molds for casting hardenable casting resins
DE911021C (en) Process for the production of a Thomas steel with a low nitrogen content
DE2910772C2 (en) Process for the production of flat, rectangular cast-iron grating, casting mold for carrying out the process and foundry product produced according to the process
AT134305B (en) Process for the simultaneous production of one or more castings by centrifugal casting.
AT81538B (en) Process for the production of model plates and AbVerfahren for the production of model plates and stripping plates for molding objects with stripping plates for molding objects with inclined surfaces. sloping surfaces.
AT205294B (en) Process for manufacturing a heat regenerator and a heat regenerator manufactured according to this process
DE1484985C3 (en) Process for the production of grid-like prefabricated reinforcement elements for reinforced concrete components
DE597046C (en) Dough-shaped binder for foundry cores made of quartz sand to be dried free-standing