DE840151C - Process for pre-drying and, if necessary, pre-heating of the filler webs of synthetic resin laminates - Google Patents

Process for pre-drying and, if necessary, pre-heating of the filler webs of synthetic resin laminates

Info

Publication number
DE840151C
DE840151C DEA4704A DEA0004704A DE840151C DE 840151 C DE840151 C DE 840151C DE A4704 A DEA4704 A DE A4704A DE A0004704 A DEA0004704 A DE A0004704A DE 840151 C DE840151 C DE 840151C
Authority
DE
Germany
Prior art keywords
synthetic resin
drying
necessary
filler
heating
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
DEA4704A
Other languages
German (de)
Inventor
Hans Cropp
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.)
Audi AG
Original Assignee
Auto Union 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 Auto Union GmbH filed Critical Auto Union GmbH
Priority to DEA4704A priority Critical patent/DE840151C/en
Application granted granted Critical
Publication of DE840151C publication Critical patent/DE840151C/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/006—Ultra-high-frequency heating
    • 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
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • 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
    • B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
    • B29B13/065—Conditioning or physical treatment of the material to be shaped by drying of powder or pellets

Description

Verfahren zum Vortrocknen und gegebenenfalls Vorwärmen der Füllstoffbahnen von Kunstharz-Schicht-Preßstoffen Es ist bei der Herstellung von Kunstharzpreßstücken üblich, die zu pressenden Stücke dielektrisch vorzuwärmen und vorzutrocknen. Da die dielektrische tliärme den Werkstoff von innen nach außen in idealer Weise aufheizt, wird einerseits die Preßzeit für den einzelnen Preßling erheblich herabgesetzt, andererseits werden die Festigkeitseigenschaften des Preßlings gesteigert.Process for predrying and, if necessary, preheating the filler webs of synthetic resin laminates It is in the manufacture of synthetic resin moldings customary to dielectrically preheat and predry the pieces to be pressed. There the dielectric heat heats the material from the inside out in an ideal way, on the one hand, the pressing time for the individual pressed part is significantly reduced, on the other hand, the strength properties of the compact are increased.

Ein solches Vortrocknen ist bei Schichtpreßstoffen, d. h. Preßstoffen, die aus Kunstharzen mit Textil-oder sonstigen Füllstoffen in Bahnenform bestehen, im allgemeinen unmöglich. Gerade hier ist aber bei der Verwendung großer Formen das Vortrocknen und Vorwärmen besonders wichtig, wenn die Arbeitszeit herabgesetzt werden soll. Das Vortrocknen von Schichtpreßstoffen mit dielektrischer Wärme ist deswegen so schwierig, weil die Kunstharze bei diesem Verfahren im allgemeinen pulverig verwendet werden und daher mit Füllstoff zusammen aus rein arbeitstechnischen Gründen nicht erwärmt werden können. Such predrying is necessary in the case of laminates, i.e. H. Molding materials, which consist of synthetic resins with textile or other fillers in sheet form, generally impossible. But this is precisely where large shapes are used Pre-drying and preheating are particularly important when working hours are reduced shall be. The pre-drying of laminates with dielectric heat is Difficult because the synthetic resins are generally powdery in this process are used and therefore together with filler for purely technical reasons cannot be heated.

Es ist ferner bei der Herstellung von Körpern aus zu verleimenden Ausgangsstoffen bekannt, das Preßgut zwischen dielektrisch heizenden Walzen vorzuwärmen oder fertigzutrocknen. It is also used in the manufacture of bodies to be glued Starting materials known to preheat the pressed material between dielectrically heating rollers or to finish drying.

Die Erfindung macht von dieser Vorrichtung zum dielektrischen Vortrocknen und gegebenenfalls Vorwärmen der Füllstoffbahnen von Kunstharz-Schicht-Preßstoffen Gebrauch und besteht in einem dielektrisch heizenden Kalander, dessen eine Walze an die HF-Spannung und dessen andere an Masse gelegt ist und durch den die mit zähflüssigem Kunstharz getränkten Füllstoffbahnen geleitet werden. The invention makes this device for dielectric predrying and optionally preheating the filler webs of synthetic resin laminated molded materials Use and consists in a dielectric heating calender, one of which is a roll to the HF voltage and the other to ground and through which the filler strips soaked with viscous synthetic resin are guided.

Der Füllstoffbahn wird das Kunstharz in zähflüssigem Zustand zugeführt. Die so getränkte Bahn durchläuft den dielektrisch heizenden Kalander, wird hier handtrocken und auf etwa 60° erwärmt. Der so vorbehandelte Schichtstoff kann im großtechnischen Verfahren in einfachster Weise und in wesentlich kürzerer Zeit verarbeitet werden. The synthetic resin is fed to the filler web in a viscous state. The web soaked in this way runs through the dielectrically heating calender Touch dry and heated to around 60 °. The laminate pretreated in this way can be used in large-scale processes processed in the simplest way and in a much shorter time will.

Claims (1)

PATENTANSPRUCH: Vorrichtung zum dielektrischen Vortrocknen und gegebenenfalls Vorwärmen der Füllstoffbahnen von Kunstharz-Schicht-Preßstoffen, gekennzeichnet durch einen dielektrisch heizenden Kalander, dessen eine Walze an die HF-Spannung und dessen andere an Masse gelegt ist und durch den die mit zähflüssigem Kunstharz getränkten Füllstoffbahnen geleitet werden. PATENT CLAIM: Device for dielectric pre-drying and possibly Preheating of the filler webs of synthetic resin laminated molded materials, marked by a dielectrically heating calender, one of which is connected to the HF voltage and the other is grounded and through which the viscous synthetic resin soaked filler webs are passed.
DEA4704A 1950-10-14 1950-10-14 Process for pre-drying and, if necessary, pre-heating of the filler webs of synthetic resin laminates Expired DE840151C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA4704A DE840151C (en) 1950-10-14 1950-10-14 Process for pre-drying and, if necessary, pre-heating of the filler webs of synthetic resin laminates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA4704A DE840151C (en) 1950-10-14 1950-10-14 Process for pre-drying and, if necessary, pre-heating of the filler webs of synthetic resin laminates

Publications (1)

Publication Number Publication Date
DE840151C true DE840151C (en) 1952-05-29

Family

ID=6920503

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA4704A Expired DE840151C (en) 1950-10-14 1950-10-14 Process for pre-drying and, if necessary, pre-heating of the filler webs of synthetic resin laminates

Country Status (1)

Country Link
DE (1) DE840151C (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE532505C (en) * 1928-10-09 1931-12-04 Gutehoffnungshuette Oberhausen Process for dewatering damp substances
DE715632C (en) * 1936-03-17 1942-01-05 Siemens Ag Manufacture of molded parts from molding compound
CH248556A (en) * 1944-12-15 1947-05-15 Patelhold Patentverwertung Method and device for the production of bodies from starting materials to be glued by high-frequency heating.
US2513434A (en) * 1946-12-10 1950-07-04 Hercules Powder Co Ltd Apparatus for the preparation of thermoplastic materials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE532505C (en) * 1928-10-09 1931-12-04 Gutehoffnungshuette Oberhausen Process for dewatering damp substances
DE715632C (en) * 1936-03-17 1942-01-05 Siemens Ag Manufacture of molded parts from molding compound
CH248556A (en) * 1944-12-15 1947-05-15 Patelhold Patentverwertung Method and device for the production of bodies from starting materials to be glued by high-frequency heating.
US2513434A (en) * 1946-12-10 1950-07-04 Hercules Powder Co Ltd Apparatus for the preparation of thermoplastic materials

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