About: Weld line     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : owl:Thing, within Data Space : dbpedia.org associated with source document(s)
QRcode icon
http://dbpedia.org/describe/?url=http%3A%2F%2Fdbpedia.org%2Fresource%2FWeld_line

In manufacturing, the Weld line or Knit line or Meld line is the line where two flow fronts meet when there is the inability of two or more flow fronts to "knit" together, or "weld", during the molding process. These lines usually occur around holes or obstructions and cause locally weak areas in the molded part. Knit lines are considered molding defects, and occur when the mold or/and material temperatures are set too low: thus the materials will be cold when they meet, so that they do not bond perfectly. This can cause a weak area in the part which can cause breakage when the part is under stress. Weld lines therefore occur during machine start-up, when equilibrium conditions have not been met. Mouldings made in this setting-up period must be rejected.

AttributesValues
rdfs:label
  • Studený spoj (vstřikování plastů) (cs)
  • Weld line (en)
rdfs:comment
  • Studený spoj (užívané někdy i anglické názvy weld line, knit line nebo meld line) je ve vstřikování plastů spoj ve tvářeném výrobku, v kterém se stýkají dva nebo více proudů materiálu ve formě, v které se výrobek tvářel. Jedná se o vadu výrobku, nedokonalý svar, který se projevuje zeslabením pevnosti na tomto spoji. To je určující především u mechanicky namáhaných výrobků. Riziko je relativně vysoké v ohybu nebo v rázu, v tak značné není. Čím je výrobek tenčí, tím má studený spoj větší vliv na pevnost. Vzhledově se projevuje jako čára na povrchu výrobku v místě spoje. V rámci kvality výrobku se kontroluje její vzhled a průběh. (cs)
  • In manufacturing, the Weld line or Knit line or Meld line is the line where two flow fronts meet when there is the inability of two or more flow fronts to "knit" together, or "weld", during the molding process. These lines usually occur around holes or obstructions and cause locally weak areas in the molded part. Knit lines are considered molding defects, and occur when the mold or/and material temperatures are set too low: thus the materials will be cold when they meet, so that they do not bond perfectly. This can cause a weak area in the part which can cause breakage when the part is under stress. Weld lines therefore occur during machine start-up, when equilibrium conditions have not been met. Mouldings made in this setting-up period must be rejected. (en)
dcterms:subject
Wikipage page ID
Wikipage revision ID
Link from a Wikipage to another Wikipage
sameAs
dbp:wikiPageUsesTemplate
has abstract
  • Studený spoj (užívané někdy i anglické názvy weld line, knit line nebo meld line) je ve vstřikování plastů spoj ve tvářeném výrobku, v kterém se stýkají dva nebo více proudů materiálu ve formě, v které se výrobek tvářel. Jedná se o vadu výrobku, nedokonalý svar, který se projevuje zeslabením pevnosti na tomto spoji. To je určující především u mechanicky namáhaných výrobků. Riziko je relativně vysoké v ohybu nebo v rázu, v tak značné není. Čím je výrobek tenčí, tím má studený spoj větší vliv na pevnost. Vzhledově se projevuje jako čára na povrchu výrobku v místě spoje. V rámci kvality výrobku se kontroluje její vzhled a průběh. (cs)
  • In manufacturing, the Weld line or Knit line or Meld line is the line where two flow fronts meet when there is the inability of two or more flow fronts to "knit" together, or "weld", during the molding process. These lines usually occur around holes or obstructions and cause locally weak areas in the molded part. Knit lines are considered molding defects, and occur when the mold or/and material temperatures are set too low: thus the materials will be cold when they meet, so that they do not bond perfectly. This can cause a weak area in the part which can cause breakage when the part is under stress. Weld lines therefore occur during machine start-up, when equilibrium conditions have not been met. Mouldings made in this setting-up period must be rejected. There are many Computer Aided Engineering tools that are available that can predict where these areas could occur, but a skilled designer will be able to predict where such defects can be found by examining the tool or product. Weld lines are not found in other manufacturing methods such as Rotational moulding, but can exist in extrusion, especially where there are internal metal supports for a die. The defects are then known as . (en)
gold:hypernym
prov:wasDerivedFrom
page length (characters) of wiki page
foaf:isPrimaryTopicOf
is Link from a Wikipage to another Wikipage of
is Wikipage redirect of
is foaf:primaryTopic of
Faceted Search & Find service v1.17_git139 as of Feb 29 2024


Alternative Linked Data Documents: ODE     Content Formats:   [cxml] [csv]     RDF   [text] [turtle] [ld+json] [rdf+json] [rdf+xml]     ODATA   [atom+xml] [odata+json]     Microdata   [microdata+json] [html]    About   
This material is Open Knowledge   W3C Semantic Web Technology [RDF Data] Valid XHTML + RDFa
OpenLink Virtuoso version 08.03.3330 as of Mar 19 2024, on Linux (x86_64-generic-linux-glibc212), Single-Server Edition (378 GB total memory, 53 GB memory in use)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2024 OpenLink Software