Dɛn Ne Nneɛma a Wɔde Yɛ Plastic Afã horow?
Dɛn Ne Nneɛma a Wɔde Yɛ Plastic Afã horow?
Nneɛma a wɔde yɛ plastic afã horow no fa nsusuwii ahorow te sɛ geometry, dimensional pɛpɛɛpɛ, draw ratio, surface roughness, ɔfasu no mu duru, draft angle, tokuru no kɛse, fillet radii, mold draft angle, ne reinforcement ribs ho titiriw. Saa asɛm yi bɛkyerɛkyerɛ saa nsɛm yi mu biara mu kɔ akyiri na wɔaka sɛnea wɔbɛma saa nneɛma yi ayɛ papa wɔ thermoforming nhyehyɛe no mu na ama nneɛma no ayɛ papa na ama nneɛma a wɔyɛ no atu mpɔn ho asɛm.
1. Geometry ne Nsusuwii a Ɛyɛ Pɛpɛɛpɛ
Firi plastic a wɔde yɛ ɔhyew yɛ ɔkwan a ɛto so abien a wɔfa so yɛ adwuma, titiriw wɔ vacuum forming mu no, mpɛn pii no, nsonsonoe da plastic krataa ne nkuku no ntam. Bio nso, sɛ ɛtwetwe ne nea ɛsakra, titiriw wɔ mmeae a ɛpuepue a, ebetumi ama ɔfasu no mu duru ayɛ mmerɛw, na ama ahoɔden so atew. Enti, ɛnsɛ sɛ plastic afã horow a wɔde di dwuma wɔ vacuum forming mu no nya ahwehwɛde ahorow a emu yɛ den dodo wɔ geometry ne dimensional pɛpɛɛpɛ ho.
Bere a wɔreyɛ no, plastic krataa a wɔayɛ no hyew no wɔ tebea a ɛtrɛw a wontumi nsiw ano mu, na ebetumi ama ahwe ase. Sɛ wɔde onwini ne shrinkage kɛse ka ho wɔ demolding akyi a, ade no nsusuwii ne ne nsusuwii a etwa to betumi ayɛ nea entumi nnyina esiane ɔhyew ne nneɛma a atwa yɛn ho ahyia nsakrae nti. Esiane eyi nti, plastic afã horow a wɔayɛ no thermoformed no mfata mma precision molding applications.
2. Twe Nkyɛmu
Draw ratio, a ɛyɛ ɔfã no sorokɔ (anaasɛ emu dɔ) ne ne tɛtrɛtɛ (anaa ne ntwemu) nsusuwii no na ɛkyerɛ sɛnea ɔkwan a wɔfa so yɛ no yɛ den no kɛse. Dodow a draw ratio no yɛ kɛse no, dodow no ara na molding no yɛ den, na dodow no ara na nsɛm a wɔmpɛ te sɛ wrinkling anaa mpaapaemu betumi aba. Draw ratios a ɛboro so no brɛ ɔfã no ahoɔden ne ne stiffness ase kɛse. Enti, wɔ nneɛma a wɔyɛ ankasa mu no, wɔtaa de range a ɛba fam sen draw ratio a ɛsen biara di dwuma, mpɛn pii no ɛyɛ 0.5 ne 1 ntam.
Draw ratio no ne ɔfasu no mu duru a ɛba fam koraa a ɛwɔ ɔfã no mu no wɔ abusuabɔ tẽẽ. Draw ratio ketewaa bi betumi ama afasu a ɛyɛ den, a ɛfata ma ntama a ɛyɛ tratraa a wɔyɛ, bere a draw ratio kɛse hwehwɛ sɛ wɔde nkratafa a ɛyɛ den di dwuma na ama wɔahwɛ ahu sɛ ɔfasu no mu duru rennyɛ teateaa dodo. Bio nso, draw ratio no nso fa mold draft angle ne plastic ade no stretchability ho. Sɛnea ɛbɛyɛ na wɔahwɛ ahu sɛ nneɛma no yɛ papa no, ɛsɛ sɛ wɔhwɛ draw ratio no so na wɔakwati sɛ scrap rate no nkɔ soro.
3. Fillet Nsusuwii
Ɛnsɛ sɛ wɔyɛ ntwea a ano yɛ nnam wɔ plastic afã horow no ntwea so anaa anoano. Mmom no, ɛsɛ sɛ wɔde fillet kɛse biara a wobetumi de di dwuma, a mpɛn pii no ntwea so radius no nsua nsen krataa no mu duru mmɔho 4 kosi 5. Sɛ wɔantumi anyɛ saa a, ebetumi ama ade no ayɛ teateaa na adwennwen a ɛwɔ mu no ayɛ kɛse, na aka ɔfã no ahoɔden ne sɛnea ɛtra hɔ kyɛ no wɔ ɔkwan a enye so.
4. Draft Angle a wɔde kyerɛw nsɛm
Nneɛma a wɔde yɛ ɔhyew nkuku, a ɛte sɛ nkuku a wɔtaa yɛ no, hwehwɛ sɛ wɔde ɔkwan pɔtee bi a wɔfa so twe nsu fi mu na ama ayɛ mmerɛw sɛ wobeyi nkuku afi mu. Mpɛn pii no, mframa a ɛtwetwe no fi 1° kosi 4°. Wobetumi de anim ketewaa bi a ɛtwetwe nsu adi dwuma ama mmea nkuku, efisɛ plastic fã no a ɛtwetwe no ma ɛma baabi foforo bi fi hɔ, na ɛma ɛyɛ mmerɛw sɛ wobeyi nkuku afi mu.
5. Reinforcement Rib Nsusuwii
Mpɛn pii no, plastic nkratafa a wɔayɛ no hyew no yɛ tratraa koraa, na ɔkwan a wɔfa so yɛ no ano hye esiane sɛnea wɔtwetwe no nti. Enti, mpampam a wɔde hyɛ mu den a wɔde bɛka ho wɔ mmeae a ɛyɛ mmerɛw wɔ nhyehyɛe mu no yɛ ɔkwan a ɛho hia a wɔfa so ma ɛyɛ den na ahoɔden kɔ soro. Ɛsɛ sɛ wosusuw sɛnea wɔde mpampam a wɔde hyɛ mu den besisi hɔ no ho yiye na wɔakwati mmeae a ɛyɛ tratraa dodo wɔ ɔfã no ase ne ntwea so.
Nea ɛka ho no, sɛ wode nsu a ɛnyɛ den, nsusuwso, anaa agyiraehyɛde ahorow ka akorade a wɔayɛ no hyew no ase a, ebetumi ama ayɛ den na aboa ɔdan no. Nsuo a ɛyɛ tenten a ɛnyɛ den a ɛwɔ nkyɛnkyɛn no ma ɛyɛ den sɛ ɛbɛgyina hɔ, bere a nsuo a ɛnyɛ den a ɛtrɛw no, ɛwom sɛ ɛma ahoɔden a ɛko tia sɛ ɛbɛhwe ase no yɛ kɛse de, nanso ebetumi ama demolding ayɛ den kɛse.
6. Nneɛma a Wɔyɛ no So Tew
Nneɛma a wɔde thermoform ayɛ mpɛn pii no wonya shrinkage kɛse, a bɛyɛ 50% ba bere a onwini wɔ nkuku no mu. Sɛ nkuku no hyew yɛ kɛse a, ɔfã no betumi atew 25% foforo bere a ɛyɛ nwini kodu dan mu hyew mu bere a wɔayi nkuku no afi hɔ akyi no, na 25% a aka no bɛtew wɔ nnɔnhwerew 24 a edi hɔ no mu. Bio nso, nneɛma a wɔde mmea nkuku na ɛyɛ no taa nya shrinkage rate 25% kosi 50% sen nea wɔde mmarima nkuku na ɛyɛ. Enti, ɛho hia sɛ wosusuw ntwitwiridii ho bere a wɔreyɛ nhyehyɛe no de ahwɛ ahu sɛ nsusuwii a etwa to no bedi pɛpɛɛpɛyɛ ahwehwɛde ahorow ho dwuma.
Ɛdenam nhyehyɛe a wɔbɛma ayɛ papa ama geometry, draw ratio, fillet radius, draft angle, reinforcement ribs, ne shrinkage so no, wobetumi ama plastic afã horow a wɔayɛ no thermoformed no su ne nea egyina pintinn no atu mpɔn kɛse. Saa nneɛma a wɔde yɛ adwuma yi wɔ nkɛntɛnsoɔ titire wɔ nneɛma a wɔde thermoformed ayɛ no yiedie ne adwumayɛ so na ɛyɛ adeɛ titire a ɛbɛma wɔahwɛ sɛ nneɛma no di wɔn a wɔde di dwuma no ahwehwɛdeɛ ho dwuma.