Umhlahlandlela wokulondolozwa komtjhini omncani wokutjhisa wokusebenza kwesikhathi eside

Umhlahlandlela wokulondolozwa komtjhini omncani wokutjhisa wokusebenza kwesikhathi eside

Umtjhini omncani wokwenza umtjhisongebanga lendawo yayo encani, ukusetjenziswa kwamandla okuncani, nokutjhuguluka okukhulu, yamukelwa linani elikhulako lamabhizinisi namaziko we-R&D. Kodwana, ngemva kobana imitjhini isetjenziswe, abasebenzisi abanengi bavame ukutjheja khulu amandla wokukhiqiza nemiphumela yokwakha ngesikhathi bangatjheji ukugcinwa kwemitjhini, okurholela ekutheni ukusebenza kwehle, ikhwalithi yokwakha engazinzileko, ngitjho nokunciphisa ipilo yoke yomtjhini.

Abantu abanengi abazi bona bangathomaphi lokha nakuziwa ekutlhogonyeleni umtjhini omncani wokutjhisa. Namhlanjesi, iindlela zokulondoloza zichazwe kuhle ngokunabileko, begodu amakhasimende angenza ukulondoloza imitjhini ngokuya ngeendingo zawo.

I. Ukuqakatheka kokugcinwa kwemitjhini encani yokutjhisa

Umsebenzi wokutlhogomela umtjhini omncani wokwenza umtjhiso ngokuyinhloko ukulawulwa kokuvimbela "okuvimbela imiraro ngaphambi kobana yenzeke."

Qinisekisa ukusebenza okuzinzileko kwesikhathi eside kwemitjhini begodu wehlise ukulahlekelwa okubangelwa sikhathi sokuphumula ngebanga lokubhalelwa. Ikambiso yokusebenza komtjhini omncani wokwenza i-thermoforming ifaka hlangana ukusebenza okuhlangeneko kweenhlelo ezinengi ezifana nokufuthumala, ukudlulisa, umoya, kanye neenhlelo zokupholisa. Ukuguga, ukuguga, nofana ukubhalelwa kwanoma ngiyiphi ingcenye kuzokuphazamisa yoke ikambiso yokukhiqiza.

Thuthukisa ukuzinza kwekhwalithi yomkhiqizo begodu wehlise iindleko zokukhiqiza. Nangabe imitjhini isesimeni esingakajayeleki sokusebenza, imiraro efana namaphethelo angapheleleko, ukujiya okungalingani, ukuguquguquka, nokunamathelana kungenzeka, okurholela ekwandeni kwemikhiqizo engakafaneli kanye nezinga eliphezulu lokulahlwa kwezinto zamashidi.

Nabisa ipilo yesevisi yemitjhini. Ukutlhogonyelwa njalo kungehlisa ukuguga kwemitjhini begodu kugweme ukulahlwa ngaphambi kwesikhathi okubangelwa kusetjenziswa khulu nofana ukutlhogonyelwa okungakalungi.

II. Ukutlhogonyelwa kweengcenye eziqakathekileko zemitjhini emincani yokufuthumala

Iingcenye lezi zisisekelo sokusebenza okujayelekileko kwemitjhini begodu zibuye zibe yinto eqakathekileko emsebenzini wokulondoloza.

(1) Irherho lokufuthumala
Irherho lokufuthumala ikakhulukazi liqukethe amashubhu wokufuthumala, iinzwa zokutjhisa, kanye nabalawuli bokutjhisa. Umsebenzi wayo kukutjhisa amashidi weplastiki (njenge-PET, i-PP, njll.) abe sebujameni obuthambileko ukuhlangabezana neemfuneko zokwakha. Ukusebenza kwehlelo lokufuthumala kuthinta ngqo umphumela wokufuthumala kwamashidi, ngaleyindlela kunquma ikhwalithi yokwakha umkhiqizo.

Ekunakekelweni kwangamalanga, kuyatlhogeka ukuhlola ubujamo bokusebenza kwesistimu yokufuthumala qobe langa, kufaka hlangana bona iyatjhisa kuhle na nokuthi ingabe kuneempawu zokuba mnyama, ukulimala, nofana ukutjhuguluka ebusweni.

(2) Ukwakha isikhunta

Ama-mold wemitjhini emincani yokwenza i-thermoforming kanengi akhiwe ngokwezifiso ukufanisa iinqophiso ezithileko zomkhiqizo. Ukunemba kwazo nobuqotho babo kuthinta ngqo ikhwalithi yomkhiqizo. Ngesikhathi sokusebenza, ama-mold athintana namashidi weplastiki afuthumeleko begodu athambekele ekungcolisweni ziinsalela zeplastiki, amabala wamafutha, njll. Ngesikhathi esifanako, athoma ukugandeleleka kwesikhathi eside nokutjhuguluka kwamazinga womtjhiso, okungabanga ukuguga, ukuguquguquka, nofana ukuqhekeka. Ngalokho-ke, umsebenzi wokuhlanza, ukuthambisa, nokuhlola kufanele wenziwe kuhle.

(3) Irherho lokuDlulisa

Irherho lokudlulisa umtjhini omncani wokwenza umtjhiso libunjwa ziinjini, amaketango, amagiya, amareyili wokuqondisa, kanye nama-roller wokuphakela, ukuqinisekisa ukusebenza okuhlangeneko kwazo zoke iingaba zemitjhini. Iingcenye zesistimu yokudlulisa zisebenza isikhathi eside begodu zithambekele ekugugeni, ukukhululeka, nomsindo ongakajayeleki, ngalokho-ke ukuhlolwa njalo, ukuthambisa, nokulungiswa kuyatlhogeka.

(4) Ihlelo lomoya

Irherho lomoya le umtjhini omncani wokwenza umtjhiso ikakhulukazi iqukethe isicindezeli somoya, amasilinda, amavalvu we-solenoid, amapayipi womoya, kanye namasefo, ukuqinisekisa ukusetjenziswa okurhabako nokuzinzileko kwezenzo ezihlukahlukeneko. Umsebenzi wokuhlanza, ukukhipha amanzi, nokuhlola kufanele kugandelelwe.

Ekunakekelweni kwangamalanga, ubujamo bokusebenza kwesistimu yomoya kufanele buhlolwe qobe langa. Ngokuvamileko, umfutho wesistimu yomoya womtjhini omncani wokwenza umtjhiso kufanele ugcinwe hlangana kwe-0.6 ukuya ku-0.8 MPa. Nangabe umfutho uphezulu khulu nofana uphasi khulu, amapharamitha womtjhini womoya kufanele alungiswe ngesikhathi. Hlola ubujamo bokukhipha amanzi wesihluzo qobe langa.

(5) Ukutlhogonyelwa kwehlelo lokupholisa

Irherho lokupholisa lisebenza ukupholisa kokubili umkhiqizo owenziwe nge-thermoform kanye nesikhunta ngemva kokufuthumala, ukuqinisekisa ukubekwa okurhabako komkhiqizo. Iinhlelo zokupholisa zemitjhini emincani yokwenza i-thermoforming zihlukaniswe njengezipholiswa ngamanzi nofana ezipholiswako ngomoya.

Eenhlelweni ezipholiswa ngamanzi, izinga lethangi lokupholisa kufanele lihlolwe qobe langa ukuqinisekisa bona lihlala ngaphakathi kwebanga elibekiweko. Nangabe izinga lingaphasi kwezinga eliphasi, gcwalisa msinyana ngokusebenzisa amanzi ahlanjululweko nofana ahlanjululweko. Balekela ukusebenzisa amanzi wempompi, ngombana ubujamo bawo bamaminerali bungabangela ukwakheka kwesikali, kuvimbe iindlela zokupholisa begodu kuphazamise ukusebenza kuhle.

Eenhlelweni ezipholiswa mumoya, ukuhlolwa kwamalanga woke kwesimo sokusebenza sefeni yokupholisa kuyatlhogeka. Qala bona ifeni iyajikeleza kuhle na, ihlola bona ingabe ikhona imisindo engakajayeleki, begodu ihlole ukubuthelelana kwethuli.

Ukutlhogonyelwa kuhle kwemitjhini emincani yokwenza i-thermoforming akugcini ngokunciphisa isikhathi sokungasebenzi kwemitjhini ngebanga lamaphutha, kuthuthukisa ukusebenza kuhle kokukhiqiza kanye nekhwalithi yomkhiqizo, begodu kwehlisa iindleko zokukhiqiza, kodwana kwandisa ipilo yemisebenzi yemitjhini.