CS224480B1 - Method and device for forming a formed profile - Google Patents

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'· / - 224,480 HA3BAW ΙΟΕΡΕΤΕΗΚΗΓ Μβτοπ H SO yCTpOÍíCTBO Η3Γ0Τ0ΒΛΘΗΗΗ ΒΟΠΘΗθΗΗΗΧ njiaCTMaCCOBHXnpďbiuieň OEJIACTL nPWHEHMff Ϊ430ΕΡΕΤΕΗΜΗ ΐΓ3Ο0ρθΤΘΗΙΙθ OTHOCHTCH K ΜθΤΟΒΒΜ H3r0T0BJieRW SKCTpySHpOBaHHLEX, ΒΟΠΘΗΘΗΗΗΧ ITJiaCTMaCCOBEBC ΠΡΟφΗΗθϋ POBHOS ΠΟΒβρΧΗΟΟΤΒΚ C) H £ Ο ΗΟPOAHOÍÍ ΠΉβθΠΗΟΖ CTpyKTypOft Η K HeOÓXOSHMOMy JIJIH ΠρΟΒΘβθΗΗΗPToro MEROS ycTpoíícTBy. XAPAKTEPHCTm H3BECTHHT TEXHWCm PMHfó Πρκ Η3ΓΟΤΟΒΠβΗΚ0 3KCTpy3H0HHHX, ΒΟΠβΗβΗΗϊΙΧ njiaCTMaCCOBHX Hpo- (Sujieft pemaiomee 3HaneHne ημθθτ κοηοτρυκιβιη 3KCTpy3noHHoS iojiob KH-hoo OPA cymecTBeHHO βηηηθτ KanecTBO sraroTOBzaeMoro προ IIa-IIa ByKTa h nosynaeMyio noonsBOSHTesBHocTB npouecca 3κοτργ3ζη.

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Claims (12)

BACKGROUND OF THE INVENTION 224 480 1. A method for producing foamed plastic profiles by extruding a mass comprising a foaming agent with an extrusion head with the following foaming and subsequent calibration and cooling, characterized in that a strip is formed in the extrusion head which enters the foaming head, of which the cross-section is varied, where the speed-free friction in the extrusion direction transverse to the extrusion direction is shaped and pre-fixed and exits the foaming head in the form of a plastic film with an elastic outer surface through volume control during expansion and in case of compression * 2. A method for producing foamed plastic profiles according to claim 1, wherein the base contour lines, preferably having a circular, square or rectangular cross section, are formed in the extrusion head and further shaping into the finished profile shape. 3. A method for producing foamed plastic profiles as claimed in claim 1, wherein the temperature at the inlet opening of the foaming head is lower than the temperature of the plastic strip material and the outlet temperature is lower than the glass transition temperature. of the processed polymeric material. 4. Apparatus for carrying out a method for producing foamed plastic profiles, characterized in that foaming heads (2) are connected to the extrusion head (1) with a uniform cross-sectional change which has the same dimensions at the inlet as the extrusion head outlet dimensions ( 1). 5. Apparatus according to claim 4, characterized in that the dimensions of the cross-section at the outlet of the foaming head (2) are greater than the cross-sectional dimensions of the inlet. 224 480 6. Apparatus according to claim 4 or 5, characterized in that the length of the barrel (2) is one to twenty times, preferably five to ten times, greater than the largest dimension of the profile contour. 7. Apparatus according to claim 4, characterized in that the opening angle of the foaming head (2) to the extrusion axis is from -30 to +50 [deg.], Preferably -5 to +30 [deg.]. 8. Apparatus according to claim 4, wherein the opening angle of the foaming head varies in the extrusion direction relative to the extrusion axis. 9. Apparatus according to claim 4, characterized in that the inner wall of the foaming head (2) is provided with recesses and / or projections which increase in the extrusion direction. 10. Apparatus according to claim 4, characterized in that the cross-section at the outlet of the foaming head (2) is identical to the cross-sectional profile. 11. Apparatus according to any one of claims 4 to 10, characterized in that the inner wall of the foaming head (2) is a material with very good antifriction properties, preferably a fluoroplastic, or is covered with such material. 12. Apparatus according to claims 4 to 11, characterized in that the foaming head (2) has a temperature control option. 2 Drawings Recognized by the Invention based on the results of the Expertise, Patent, Berlin, DD