Teerera kune kana jekiseni richiumba PET Ita?

kana uchida PET muchina bvunza FLYSE

Contact: Lv 8618958305290

1. Kugadziriswa kwepurasitiki

Nekuti iyo PET macromolecules ine lipid mapoka uye ine imwe dhigirii ye hydrophilicity, ma pellets anonyanya kunetseka kumvura pakupisa kwepamusoro. Kana mvura yemukati ichipfuura muganhu, molecular huremu hwePET hunoderera panguva yekugadzirisa, uye zvigadzirwa zvinova nemavara uye brittle. Naizvozvo, zvinhu zvinofanira kuomeswa zvisati zvagadziriswa, uye tembiricha yekuomesa i150 ° C kweanopfuura 4 maawa, kazhinji 170°C nokuda 3-4 maawa. Iyo mhepo yekupfura nzira inogona kushandiswa kutarisa kana zvinhu zvaoma zvachose. Kazhinji, chikamu chezvinhu zvakashandiswa zvakare hazvifaniri kudarika 25%, uye zvinhu zvakadzokororwa zvinofanira kunyatsoomeswa.

2. Kusarudzwa kwejekiseni molding muchina

Nekuti PET ine nguva pfupi yakagadzikana mushure mekunyungudika uye yakakwira kunyungudika, zvinodikanwa kuti usarudze jekiseni system ine mamwe tembiricha ekudzora zvikamu uye kushoma-yega-yega kupisa chizvarwa panguva yepurasitiki, uye huremu chaihwo hwechigadzirwa (zvinhu zvine mvura) haifanirwe kuva shoma pane jekiseni remuchina. 2/3 yehuwandu. Kubva pane izvi zvinodiwa, FLYSE yakagadzira akatevedzana madiki uye epakati-saizi PET plasticizing masisitimu mumakore achangopfuura. Kusunga simba kunosarudzwa zvichienderana nehukuru kupfuura 6300t/m2.

3. Mold uye gedhi dhizaini

PET preforms kazhinji anoumbwa ne inopisa mumhanyi molds. Zvakanakisa kuve nebhodhi rekudzivirira kupisa pakati pe mold uye jekiseni molding muchina template, uye ukobvu hwayo hunosvika 12mm, uye bhodhi rinopisa rinopisa rinofanira kunge richikwanisa kumira zvakasimba. Iko kupera kunofanira kukwana kudzivirira kupisa kwenzvimbo kana kupatsanurwa, asi kudzika kwechiteshi chemagetsi hakufanire kudarika 0.03mm, zvikasadaro zviri nyore kugadzira flash.

4. Melt tembiricha

Inogona kuyerwa nemhepo-pfuti nzira. 270-295℃, iyo yakakwidziridzwa GF-PET inogona kusetwa ku290-315 ℃, nezvimwewo.

5. Jekiseni kumhanya

Kazhinji, iyo jekiseni kumhanya inofanira kukurumidza, izvo zvinogona kudzivirira kusimba nguva isati yakwana panguva yejekiseni. Asi nekukasira, iyo yakakwirira shear rate inoita kuti zvinhu zvipere. Shots inowanzopedzwa mukati 4 seconds.

6. Back pressure

Izvo zvakaderera zviri nani, kuti irege kuneta. Kazhinji kwete kupfuura 100bar. Kazhinji hazvidiwi.

7. Nguva yekugara

Usashandise nguva dzekugara zvakanyanya kudzivirira kurasikirwa kwemamorekuru. Edza kudzivirira tembiricha iri pamusoro pe300°C. Kana nguva yekudzikisa iri shoma pane 15 maminitsi. Inoda chete kupfurwa nemhepo; kana zvichitora zvinopfuura 15 maminitsi, inofanira kucheneswa ne viscosity PE, uye tembiricha yebhari inofanira kuderedzwa kusvika kune tembiricha yePE kusvika yavhurwa zvakare.

8. Zvekungwaririra

1) Izvo zvakashandiswa zvakare hazvifanirwe kunge zvakakurisa, zvikasadaro zviri nyore “zambuko” panzvimbo isina chinhu uye inokanganisa iyo plasticization. 2) Kana iyo mold tembiricha isina kudzorwa zvakanaka kana tembiricha yezvinhu haina kudzorwa zvakanaka, zviri nyore kugadzira “mhute chena” uye opacity. Kupisa kwekuumbwa kwakaderera uye kwakafanana, kukurumidza kutonhora kunokurumidza, uye chigadzirwa chacho chakajeka uye zvishoma crystallization.