Ngwakọta na ntinye nke ngwakọta mpempe akwụkwọ

Mpempe akwụkwọ ịkpụzi ogige na-ezo aka unsaturated polyester resin dị ka isi ahu, na-agbakwụnye na-agwọ gị gị n'ụlọnga, ebu ntọhapụ gị n'ụlọnga, filler, ala shrinkage gị n'ụlọnga, thickener, wdg. Ịkpụzi ogige kpuchie na polyethylene (pee) ihe nkiri.Akwụkwọ a na-akọwa n'ụzọ dị nkenke ihe mejupụtara na ngwa nhazi nke SMC.

Ngwakọta nke mpempe akwụkwọ ịkpụzi

Ihe mejupụtara SMC bụ resin polyester na-adịghị mma, onye na-eme ihe na-emekọrịta ihe, onye nrụpụta, onye na-ejuputa, onye na-ekpu mmiri, ihe ntọhapụ, eriri iko, na ihe mgbochi polymerization.N'ime ha, edemede anọ mbụ na-enye usoro ihe onwunwe maka ngwaahịa ma nwekwuo ike.Nkeji anọ ikpeazụ bụ tumadi maka njirimara nke mmụba viscosity, nguzogide corrosion, mkpuchi, na nkwụsi ike nhazi nke ngwaahịa.

1. Unsaturated polyester resin na crosslinking agents bụ isi nke SMC.A na-ejikarị resins polyester na-adịghị mma polycondensed sitere na acid dicarboxylic unsaturated (ma ọ bụ anhydrides), dicarboxylic acids (ma ọ bụ anhydrides), na polyols.O nwere ụfọdụ ihe eji arụ ọrụ na ike, na ike dị n'ime ya bụ otu.Ihe na-eme ihe na-emekọrịta ihe bụ styrene.Mgbe ejikọtara ha abụọ, ha bụ isi ihe maka ịgwọ plasticity nke ngwaahịa, nke na-arụ ọrụ njikọ, nkwado, nguzozi nnyefe, na nchebe.

2. Onye mbido na-eme ka resin na crosslinker gwọọ ma na-etolite na ọkwa nke resin tapawa.Ọrụ ya bụ iji mee ka resin na njikọ abụọ dị na monomer na-ejikọta ya dị ka styrene copolymerize ka SMC wee sie ike ma guzobe n'ime oghere ebu.

3. Ihe ndochi ahụ na-enwe ihe karịrị otu ụzọ n'ụzọ atọ nke mpempe akwụkwọ mpempe akwụkwọ ma nwee ike ịhazigharị viscosity nke ogige ịkpụzi.Ọ na-adịkarị mkpa ịnwe njirimara nke ike ndọda dị ala, uru mgbasa ozi mmanụ dị ala, obere pores, nguzogide corrosion na ọnụ ala dị ala.Ihe nkpuchi a na-ejikarị eme ihe bụ CaCO3, Al (OH) 3, na ndị ọzọ.

4. Thickeners na-enye SMC nnukwu viscosity, ihe na-adịghị mma.Nkwadebe nke mpempe akwụkwọ na ogige ịkpụzi nnukwu ihe chọrọ obere viscosity nke resin iji kwado impregnation nke eriri iko na ihe nkpuchi site na resin.Na mkpakọ ịkpụzi chọrọ elu viscosity.Ya mere, ọ dị mkpa ka ịgbakwunye a thickener tupu ịkpụzi usoro iji tọghata ala viscosity nke iko eriri impregnation n'ime a elu viscosity na-adịghị nnyapade.

5. Onye ntọhapụ na-egbochi mpempe akwụkwọ ịkpụzi ogige ka ọ ghara inwe mmekọrịta na elu metal ebu.Onye ntọhapụ nwere ike igbochi resin polyester na-enweghị ike imekọrịta ihe na elu igwe n'oge usoro plastik nke ngwakọta resin.Asịd ọdụdụ ogologo agbụ ma ọ bụ nnu nke zinc stearate nọchitere anya ya.Iji oke eme ihe ga-adị mfe ibelata arụmọrụ ngwaahịa.Ojiji eji eme ihe maka 1 ~ 3% nke mkpokọta ngwaahịa iji hụ na ịdị mma nke ngwaahịa ahụ.

6. Glass fibers nwere ike welie ihe mgbochi corrosion na mkpuchi mkpuchi nke SMC.Ngwakọta mpempe akwụkwọ na-akpụzi na-ahọrọkarị akwa akwa enyo enyo dị ka ihe nkwado.Ojiji nke ukwuu ga-eme ka ngwaahịa ahụ dị oke nro, yana iji obere dose agaghị enwe mmetụta na-ewusi ike doro anya na ngwaahịa ahụ.Ojiji n'ozuzu bụ ihe dịka 20%.N'ụzọ dị otú a, ngwaahịa nwere ike n'out oge izute abụọ usoro nke extrusion ịkpụzi na mkpakọ ịkpụzi.

7. Inhibitor na-abawanye nkwụsi ike nke SMC ma na-agbatị oge nchekwa.Ebe ọ bụ na styrene onye mmalite ga-eji nwayọọ nwayọọ na-agbaze, na-eme ka polymerization nke resin, na-agbakwunye ego kwesịrị ekwesị nke radical radical scavenger (polymerization inhibitor) nwere ike belata ngwa ngwa nke nkwụsị nke styrene na ogologo oge nchekwa ya.Ndị na-egbochi ihe na-abụkarị benzoquinones na ogige phenolic polyvalent.

Ngwa nke Ngwakọta Ngwakọta Mpempe akwụkwọ

SMC nwere uru nke magburu onwe eletriki arụmọrụ, ike corrosion eguzogide, fechaa, mfe na mgbanwe engineering imewe, wdg Ya n'ibu Njirimara bụ tụnyere ụfọdụ metal ihe.Ya mere, a na-eji ya na mpaghara asatọ dịka ụlọ ọrụ ụgbọ ala, ụgbọ okporo ígwè, ihe owuwu, ngwa eletriki, na nkwukọrịta (Table 1).

N'ime ha, n'oge mmalite, a na-ejikarị ya eme ihe n'ụdị mkpuchi mkpuchi na mpaghara ihe owuwu, ngwa eletriki, na nkwukọrịta, na nkà na ụzụ tozuru oke.Mgbe ahụ, a na-eji ya na ụlọ ọrụ ụgbọ ala dochie akụkụ nke ígwè na aluminom alloy nke ahụ iji belata arọ nke ụgbọ ala ahụ.

N'okpuru ndabere nke nchekwa ike ugbu a na mbelata ikuku na mmepe nke ụgbọ ala ike ọhụrụ, teknụzụ nke ngwaahịa ụgbọ ala na-aga n'ihu na-etolite n'ebe dị fechaa na ịdị elu dị elu.Ruo ugbu a, a na-ahụ ngwa nke ihe SMC n'ebe niile na ndụ kwa ụbọchị.A na-egosipụta ya na nkwukọrịta ikuku, ihe mgbawa ọkụ eletrik na-agbawa agbawa, ihe mkpuchi ala, ụlọ ịsa ahụ, na ụlọ ọrụ ụgbọ oloko na-agba ọsọ.

Isiokwu 1 Isi ngwa asatọ na mpaghara nkebi nke ihe SMC

Nchịkọta

The unsaturated polyester resin, crosslinking agents, initiator, and filler in the sheet molding compound na-enye usoro ihe maka ngwaahịa ahụ ma na-abawanye ike nhazi.Thickerer, ihe ntọhapụ, eriri iko, na polymerization inhibitor na-agbakwunye viscosity, nguzogide corrosion, mkpuchi, na nkwụsi ike nhazi na ngwaahịa ahụ.A na-etinye ngwaahịa ndị dị otú ahụ na mpaghara asatọ dị mkpa gụnyere ụlọ ọrụ ụgbọ ala na ụgbọ okporo ígwè.N'okpuru ndabere nke nchekwa ike dị ugbu a, nchebe gburugburu ebe obibi, na ike dị ala, ụlọ ọrụ ụgbọ ala ewepụtala ihe dị elu na nke dị elu maka ihe SMC n'ihi ihe ha chọrọ.Nke bụ isi ihe na-eme ka mmepe nke teknụzụ SMC.

Jiri yaigwe igwe igwe eji eme ihe nke hydraulic mejupụtaraka pịa ngwaahịa ịkpụzi mpempe akwụkwọ.Zhengxi bụ ọkachamaraỤlọ ọrụ mgbasa ozi hydraulic dị na China, na-enye akwa akwa akwa akwa.Kpọtụrụ anyị ka ị nweta nkọwa.