Dab tsi yog cov txheej txheem txheej txheem rau cov khoom yas?

Dab tsi yog cov txheej txheem txheej txheem rau cov khoom yas?

Cov txheej txheem tsim qauv rau cov khoom yas feem ntau suav nrog kev txiav txim siab xws li geometry, qhov tseeb qhov tseeb, kos piv, qhov roughness, phab ntsa thickness, lub kaum sab xis, lub qhov taub, txoj kab uas hla, fillet radii, pwm lub kaum sab xis, thiab cov hlua khi. Kab lus no yuav piav qhia txhua yam ntawm cov ntsiab lus no thiab sib tham txog yuav ua li cas txhawm rau txhim kho cov ntsiab lus no thaum lub sij hawm thermoforming txheej txheem los txhim kho cov khoom zoo thiab kev ua haujlwm ntau lawm.

1. Geometry thiab Dimensional raug

Txij li thaumyas thermoformingyog ib txoj kev ua haujlwm thib ob, tshwj xeeb tshaj yog nyob rau hauv lub tshuab nqus tsev, feem ntau muaj qhov sib txawv ntawm cov ntawv yas thiab cov pwm. Tsis tas li ntawd, shrinkage thiab deformation, tshwj xeeb tshaj yog nyob rau hauv cov cheeb tsam protruding, tuaj yeem ua rau phab ntsa thickness ua thinner, ua rau txo qis zog. Yog li ntawd, cov khoom siv yas siv hauv lub tshuab nqus tsev yuav tsum tsis txhob muaj cov kev cai nruj heev rau geometry thiab qhov tseeb ntawm qhov loj.

Thaum lub sij hawm tsim cov txheej txheem, cov ntawv yas rhuab yog nyob rau hauv lub unconstrained stretching xeev, uas yuav ua rau sagging. Ua ke nrog qhov txias txias thiab shrinkage tom qab demolding, qhov kawg qhov ntev thiab cov duab ntawm cov khoom yuav tsis ruaj khov vim qhov kub thiab txias thiab ib puag ncig hloov. Vim li no, thermoformed yas qhov chaw tsis haum rau precision molding daim ntaub ntawv.

2. Kos qhov piv txwv

Qhov sib piv, uas yog qhov sib piv ntawm qhov siab (lossis qhov tob) rau nws qhov dav (los yog txoj kab uas hla), feem ntau txiav txim siab qhov nyuaj ntawm txoj kev tsim. Qhov loj dua qhov sib piv, qhov nyuaj ntawm cov txheej txheem molding yuav dhau los, thiab qhov ntau dua qhov yuav muaj teeb meem tsis zoo xws li wrinkling lossis tawg. Kev sib tw ntau dhau ua rau txo lub zog thiab nruj ntawm qhov. Yog li ntawd, nyob rau hauv qhov tseeb ntau lawm, ib tug ntau yam hauv qab no qhov siab tshaj plaws draw ratio feem ntau yog siv, feem ntau ntawm 0.5 thiab 1.

Qhov sib piv yog ncaj qha mus rau qhov tsawg kawg nkaus phab ntsa thickness ntawm ib feem. Qhov sib piv me me tuaj yeem tsim cov phab ntsa tuab, haum rau cov ntawv nyias, thaum qhov sib piv loj dua yuav tsum muaj cov ntawv tuab los xyuas kom meej tias phab ntsa thickness tsis dhau nyias. Tsis tas li ntawd, qhov sib piv ntawm qhov kos kuj muaj feem xyuam rau lub puab tsaig lub kaum sab xis thiab cov khoom siv yas stretchability. Txhawm rau kom ntseeg tau cov khoom zoo, qhov sib piv yuav tsum tau tswj kom tsis txhob muaj qhov nce ntawm cov khoom seem.

3. Fillet Tsim

Lub kaum ntse ntse yuav tsum tsis txhob tsim ntawm cov ces kaum lossis cov npoo ntawm cov khoom yas. Hloov chaw, yuav tsum siv lub fillet loj npaum li qhov ua tau, nrog rau lub kaum sab xis ntawm lub voj voog feem ntau tsis tsawg dua 4 mus rau 5 npaug ntawm cov ntawv tuab. Kev ua tsis tiav tuaj yeem ua rau nyias nyias ntawm cov khoom thiab kev ntxhov siab, ua rau tsis zoo rau lub zog thiab kav ntev.

4. Draft Angle

Thermoformingpwm, zoo ib yam li cov pwm niaj zaus, xav tau ib lub kaum sab xis kom yooj yim demolding. Lub kaum sab xis feem ntau yog nyob ntawm 1 ° txog 4 °. Lub kaum sab xis me me tuaj yeem siv rau cov poj niam pwm, vim tias qhov shrinkage ntawm cov yas muab qee qhov kev tshem tawm ntxiv, ua rau demolding yooj yim dua.

5. Reinforcement Rib Design

Cov ntawv yas thermoformed feem ntau yog nyias, thiab cov txheej txheem tsim yog txwv los ntawm qhov sib piv. Yog li ntawd, ntxiv dag zog ribs nyob rau hauv structurally tsis muaj zog cheeb tsam yog ib qho tseem ceeb txoj kev rau nce rigidity thiab lub zog. Qhov kev tso kawm ntawm qhov cuab lub zog ribs yuav tsum tau ua tib zoo xav kom tsis txhob overly nyias cheeb tsam nyob rau hauv qab thiab ces kaum ntawm ib feem.

Tsis tas li ntawd, ntxiv cov grooves ntiav, cov qauv, lossis cov cim rau hauv qab ntawm lub plhaub thermoformed tuaj yeem txhim kho rigidity thiab txhawb cov qauv. Longitudinal grooves ntawm ob sab nce ntsug rigidity, thaum transverse grooves, txawm tias yuav ua rau kom tsis kam mus rau lub cev qhuav dej, tuaj yeem ua rau demolding nyuaj dua.

6. Cov khoom shrinkage

Cov khoom siv thermoformedFeem ntau muaj kev poob qis, nrog txog 50% ntawm nws tshwm sim thaum txias hauv pwm. Yog tias pwm kub siab, qhov yuav txo qis los ntawm 25% ntxiv thaum nws txias rau chav sov tom qab demolding, nrog rau qhov seem 25% ntawm shrinkage tshwm sim nyob rau 24 teev tom ntej. Tsis tas li ntawd, cov khoom tsim los ntawm cov poj niam pwm yuav muaj qhov shrinkage ntawm 25% mus rau 50% siab dua li cov txiv neej pwm. Yog li ntawd, nws yog ib qho tseem ceeb los txiav txim siab shrinkage thaum lub sij hawm tsim txheej txheem los xyuas kom meej tias qhov kawg qhov ntev raws li qhov yuav tsum tau muaj.

Los ntawm kev ua kom zoo rau kev tsim cov duab geometry, kos piv, lub vojvoog fillet, lub kaum sab xis ntawm lub kaum sab xis, qhov cuab lub zog ribs, thiab shrinkage, qhov zoo thiab ruaj khov ntawm cov khoom yas thermoformed tuaj yeem txhim kho tau zoo. Cov txheej txheem tsim cov ntsiab lus no muaj feem cuam tshuam rau kev tsim khoom thiab kev ua haujlwm ntawm cov khoom siv thermoformed thiab yog qhov tseem ceeb los xyuas kom meej tias cov khoom ua tau raws li cov neeg siv khoom xav tau.