Ukumiswa kwe-Srinkage yenkqubo yokubumba inaliti

Izinto ezichaphazela ukucutheka kwe-thermoplastics zezi zilandelayo:

1. Uhlobo lweplastiki:

Ngexesha lenkqubo yokubumba yethermoplastics, kusekho ezinye izinto ezifana nokutshintsha kwevolumu ngenxa yekristali, uxinzelelo olunamandla lwangaphakathi, uxinzelelo olukhulu olushiyekileyo olugcinwe kwindawo yeplastiki, i-molecular orientation eyomeleleyo, njl. uluhlu lubanzi, kwaye i-directivity ibonakala.Ukongeza, izinga lokucutheka emva kokubunjwa kwangaphandle, ukunyanyiswa kwe-annealing okanye ukufuma kwemeko yonyango likhulu ngokubanzi kunelo leplastiki ye-thermosetting.

2. Iimpawu zenxalenye yeplastiki:

Xa into etyhidiweyo idibana nomphezulu womgodi wokungunda, umaleko wangaphandle uphola ngoko nangoko ukwenza iqokobhe eliqinileyo elinoxinaniso olusezantsi.Ngenxa yokungahambi kakuhle kwe-thermal yeplastiki, umaleko wangaphakathi wenxalenye yeplastiki uphola ngokucothayo ukwenza umaleko oqinileyo oxineneyo kunye nokuncipha okukhulu.Ke ngoko, abo banobunzima bodonga, ukupholisa okucothayo kunye nokuqina komgangatho ophezulu kuya kuncipha ngakumbi.Ukongezelela, ubukho okanye ukungabikho kokufakwa kunye nokuhlelwa kunye nobuninzi bokufakwa kuchaphazela ngokuthe ngqo ulwalathiso lokuhamba kwezinto eziphathekayo, ukusabalalisa ubuninzi kunye nokuxhatshazwa kwe-shrinkage.Ngoko ke, iimpawu zeengxenye zeplastiki zinempembelelo enkulu kubukhulu be-shrinkage kunye nolwalathiso.

3. Uhlobo lokungenisa ukutya, ubungakanani nosasazo:

Ezi zinto zichaphazela ngokuthe ngqo ulwalathiso lokuhamba kwezinto, ukusabalalisa ukuxinana, ukubamba uxinzelelo kunye nefuthe lokutya kunye nexesha lokubumba.I-feed inlet ngqo kunye ne-feed inlet enecandelo elikhulu (icandelo ngokukodwa elishinyeneyo) linokuncipha okuncinci kodwa ukuqondisa okukhulu, ngelixa i-feed inlet enobubanzi obufutshane kunye nobude bunokuqondisa okuncinci.Abo basondeleyo kwi-inlet feed okanye ehambelana nolwalathiso lokuhamba kwezinto eziphathekayo baya kuba nokuncipha okukhulu.

4. Imiqathango yokwenza:

Iqondo lobushushu lokungunda liphezulu, izinto ezinyibilikisiweyo ziphola kancinci, ukuxinana kuphezulu, kwaye ukucutheka kukhulu.Ngokukodwa kwi-crystalline material, i-shrinkage inkulu ngenxa ye-crystallinity ephezulu kunye nokuguqulwa kwevolumu enkulu.Ukusasazwa kobushushu bomngundo kukwanxulumene nokupholisa kwangaphakathi nangaphandle kunye nokuxinana kweenxalenye zeplastiki, ezichaphazela ngokuthe ngqo ubungakanani kunye nolwalathiso lokucutheka kwenxalenye nganye.

Ngexeshauyilo lokungunda, izinga lokucutheka kwenxalenye nganye yenxalenye yeplastiki iya kumiselwa ngokusekelwe kumava ngokoluhlu lokucutheka kweeplastiki ezahlukeneyo, ubukhulu bodonga kunye nokumila kwenxalenye yeplastiki, ifom, ubungakanani kunye nokuhanjiswa kwe-inlet feed, kwaye ke ubungakanani bomgodi buya kubalwa.

Kwiindawo zeplastiki ezichaneke kakhulu kwaye xa kunzima ukulawula izinga lokucutheka, ezi ndlela zilandelayo kufuneka zisetyenziswe ngokubanzi ukuyila ukubumba:

① Idayamitha yangaphandle yamalungu eplastiki iya kuba nesantya esincinci sokucutheka, kwaye idiamitha yangaphakathi iya kuba nesantya esikhulu sokushwabana, ukuze ushiye indawo yokulungiswa emva kovavanyo lokungunda.

② Uvavanyo lokubumba lumisela ifom, ubungakanani kunye neemeko zokubumba zenkqubo yokungena.

③ Amalungu eplastiki aza kunyangwa emva konyango aya kuxhomekeka kunyango lwasemva konyango ukumisela utshintsho lobungakanani (umlinganiselo kufuneka wenziwe iiyure ezingama-24 emva kokudilizwa).

④ Lungisa umngundo ngokokucutheka.

⑤ Zama ukubumba kwakhona kwaye uguqule ixabiso le-shrinkage kancane ngokuguqula iimeko zenkqubo ngokufanelekileyo ukuhlangabezana neemfuno zenxalenye yeplastiki.