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plastic raw materials material property and injection molding processing process
一, PS
(常称 hard 胶): 1, water 24 small rear water 0.04%. 2, easy 碎, easy 燃, easy aging, long 期暴露 in cationic light lower easy 变黄, color. 3, PS会沉于 water, use add hot rear soft 化燃烧, 发出乌黑 黄 color and odor, rear odor especially 显蓍, need use its it material 进行清理. 4, shrinkage property 0.4%, add glass fiber (GF) 25%GF rear is 0.2%. 5, dry 70℃(2-3H). use raw materials 啤塑烘 dry 2 small 时, add water material or gas wet (2 month 份~5 month 份)3 small 时. 6, metal parts: metal preheating 80℃~120℃, 油, outer has 凹槽. 7, suitable general purpose filament: L: D=18: 18, temperature degree: 200℃~250℃a, high temperature reduce quality toward property, add strong/high its resistant 折断(如 ejection 时) and resistant hot can force. b, 若250℃时, material time can ultra- 5 separation 钟, 若275℃时, can ultra- 1~2 separation 钟. 9, attention/notes pressure liquid temperature degree, material temperature degree, plastics temperature degree, mold temperature control. 10, temperature degree setting value: rear: 150~180℃, in 间: 180~230℃, in: 210~250℃, front: 210℃~280℃, 咀: 210~280℃, 模: 10~80℃11, speed: high speed (无 must high pressure )12, speed: can very high ( most good combined cycle )13, back pressure: use low back pressure (啤 has color can combined )
二, PP
.
polypropylene (PP) (POLY PRO PYLENE): 常称百折胶, shrink 写: PP, PPR, PPN, PP-N, PP-K, PP-C, PP-HO, PP-CO. 1, heat deflection temperature (HDT) is 100℃, 抵受沸 water, 蒸汽, 消毒. 2, 以火焰 add hot rear 约170℃熔化, micro low light, in belt/tape 黄, rear still 然燃烧, odor wax 烛, machine need use its it material 进行清理. 3, shrinkage property: PP is semi hot property material, shrinkage rate 1.8%~2.5%, 24 small shrinkage 8.5%, 首星期98%, 放入沸 water 1 small formed. 注: shrinkage time long table/sheet injection molding process 出错(如 mold temperature high, temperature low, pressure high ), 如放入沸 water 15 separation separation deformation table/sheet injection molding process issues. 4, add 入30% glass fiber (GF) (名 is PPGF30) can will shrinkage property decrease to 0.7%. 5, can outer light, in 85℃ high temperature lower by or chlorine carbon solvent understanding; in high temperature lower and has copper mixed plastics 接触会导致 separation understanding. 6, PP is semi hot property material, mold temperature is 50℃, can use general purpose filament (L: D=20: 1). 7, temperature: 220~275℃, ultra- 275℃, 否则黏 degree 会剧变并出现 oxidation phenomenon. 8, machine material 停留: 260℃ time can ultra- 5~6 separation 钟, 270℃ time can ultra- 2~3 separation 钟. 9, temperature degree degree value: rear: 190~230℃, in 间: 200~240℃, in: 210~260℃, front: 220℃~270℃, 咀: 220~270℃, 模: 30~80℃
10, speed: high speed ( can decrease/reduce internal force and deformation ), surface 出现纹, surface issues can use low speed high mold temperature, can use high pressure. 11, filament speed: combined cycle, back pressure low good.
三, ABS
(常称 ultra- 不碎胶)
1, shrinkage rate 0.4%~0.8%, add 20%GF glass fiber (GF), rear is 0.2%~0.4%..
2, color is color or white, hot degree temperature degree upper rise 而稳步 decline, melting point is 175℃.
3, 燃烧时会 generate color belt/tape 黑烟 火焰, similar concentrated alkali 味, generally grade easy 燃, can 自动熄灭.
4, room temperature 24 small inner water 0.2~0.35%, has necessary can 焗80℃/2~4 small 时. use raw materials 啤塑烘 dry 2 small 时, add water material or gas wet 2~5 month 份焗4 small 时. (注: must 严格遵守货 material 先进先出 tube/pipe made degree. )5, mold temperature most good 60℃, hot runner mold suitable for anti grade ABS.
(2006-06-05 15:33:29 )
6, can can use slow speed 回胶, low temperature machine is low back pressure.
7, impact resistant grade: need 220~260℃, 以250℃ is 佳.
electroplating grade: need 250~275℃, 以275℃ is 佳.
.
resistant hot grade: need 240~280℃, 以265~270℃ is 佳.
anti grade: need 200~240℃, 以220~225℃ is 佳.
transparent grade: need 230~260℃, 以245℃ is 佳.
含 glass fiber (GF) grade: need 230~270℃, mold temperature 则60~95℃.
8, in 265℃ lower, machine 筒停留不 can ultra- 5~6 separation 钟, 280℃时不 can ultra- 2~3 separation 钟.
9, ABS material in machine 筒停留 time long, hot make ABS products ejection issues, can can in 保存期 inner generate color or strip/profile 纹, time or cycle 不定会造 formed products in 贮存期 inner 发生变 color.
10, speed: anti grade use slow speed (免 separation understanding ), resistant hot grade use fast speed ( reduce internal stress ), need production most product, has high degree gloss, need using/adopting high speed more grade injection molding speed degree, material need dry 爽, and mold temperature degree need high.
11, filament speed: most good slow speed (配 combined cycle ) low back pressure.
12, ABS material in 40~100℃ lower property still can maintain 不变, hot temperature degree 100℃.
四, POM
: 常称赛钢
1, material material property 质: make in 50℃ lower, its impact resistant force still maintain good, POM-H has most large shrink strong/high degree, warpage strong/high degree, resistant fatigue and hardness, POM-K has relatively 佳 遇 heat stabilized property, resistant alkali, resistant hot water property, above 两者 晶体, water absorption low. shrinkage rate is 2
2, POM is high degree 晶体(约80℃) material material, shrinkage degree high, 48 small inner 会出现塑 rear shrinkage 0.1% high mold temperature increase shrink parts shrinkage, decrease/reduce rear shrinkage ( precision products need use high mold temperature can production stability product ).
3, POM燃烧呈淡蓝 color, lower liquid, material material and 烟雾不 more, rear strong/high 烈 甲 aldehyde odor, POM-H melting point is 175℃, POM-K is 164℃. 4, POM焗 material 85℃/2~3 small 时. POM-H/POM-K can use 215℃(190~230℃), can ultra- 240℃. use raw materials 啤塑烘 dry 2 small 时, add water material or gas wet 2~5 month 份时焗 material 3 small 时.
5, equipment excellent 良(没 has retardant 塞点), POM-H can in 215℃ lower 停留35 separation 钟, POM-K can in 205℃ lower 停留20 separation 钟, 不会出现 separation understanding. need small 心清理, waste material cold water in, in temperature degree lower, 熔胶不 can in machine inner ultra- 20 separation 钟, POM-K can in 240℃ lower 停留7 separation or 210℃ lower 停留20 separation 钟.
6, temperature degree setting: rear: 165~210℃, in 间: 162~200℃, in: 170~210℃, front: 180~215燃烧, 咀: 170~215℃, 模: 40~120℃. 7, speed: (填模 speed degree ) in and fast, slow 会导致剥落, fast also loss bad gate.
8, filament speed combined cycle: back pressure low good, machine most good use polyolefin (POLYDEFIN)清理, can and PVC or anti grade use machine 筒, use must
(2006-06-05 15:33:29 )
五, nylon 6
(NYLON6, PA66): shrink 写PA6
1, 燃烧时火焰呈蓝 color, belt/tape color, 冒白烟, easy 扑灭, has 烧头发 or 牛角味.
2, PA6 melting point is 220℃, PA66 is 265℃, 焗80℃/2~4 small 时, ring lower PA6 ratio PA66 absorption more more water 份, separation is 2.5% and 1.5%. use raw materials 啤塑烘 dry 2 small 时, add water material or gas wet 2~5 month material 3 small 时. 3, mold temperature is 40~80℃, temperature is 250℃, reinforced grade need 270~280℃.
4, temperature degree setting (未 reinforced grade ): rear: 220~240℃, in, 230~250℃, in: 230~260℃, front: 230~270℃, 咀: 220~260℃, 模: 60~90℃. 5, material in machine 筒停留 time: 300℃时不 can ultra- 20 separation 钟, necessary can will temperature degree drop to 200℃.
6, speed degree fast good (填模 speed degree ), need make reinforced grade surface slip gloss, must slow speed material, high speed can make surface light slip has bubbles.
7, filament speed: can combined cycle, anti grade most good need fast, back pressure low good, machine can use HDPE or PP清理.
六, PA66
( nylon ):
1, PA66吸 water amount: 每1%吸 water amount increase 0.003in, in 50% versus for wet degree, 23℃ gas temperature water amount is 2.5%.
2, PA66 melting point is 265℃, 燃烧时熔化, dark, 沸腾, 火焰蓝 in belt/tape 黄, 冒白烟, easy 扑灭, 发出西芹 odor.
3, material: can use gas hot 风炉85℃烘2~4 small 时. use raw materials 啤塑烘 dry 2 small 时, add water material or gas wet 2~5 month material 4 small 时.
4, mold temperature is 40~90℃, temperature degree 260~290℃, most good 280℃, lubricated grade and anti grade low temperature, 如260~275℃.
5, temperature degree setting: reinforced grade: rear: 275~280℃,
in: 270~285℃,
front: 265~285℃,
咀: 260~280℃,
模: 20~100℃℃.
reinforced grade: rear: 280~290℃,
in: 285~290℃, in: 275~300℃,
front: 275~290℃, 咀: 270~280℃,
模: 55~95℃.
6, machine 筒停留 time: 若熔胶 temperature degree 300℃, can ultra- 15 separation 钟, 否则会 drop 质, product color easy 碎.
7, speed: fiber filler grade and thin products need speed 射胶.
8, filament speed: slow or in, fiber filler need slow, back pressure low good.
七, PA11, PA12
( nylon 11/ nylon 12 )
1, 两者均 is property semi thermoplastic property plastics, property 质介于PA6, PE between.
2, shrinkage amount 由0.5%~2%不 and other, and other grade, products thick degree processing 情况而定, mold temperature rise high shrinkage amount 不随之 increase.
3, PA11, PA12均会沉于 water, has nylon material 都沉于 water, PE则浮于 water, separation nylon its melting point.
4, material: 85℃/3~5 small 时, temperature degree 240~300℃, most good 260℃, standards grade ultra- 310℃, anti grade ultra- 270℃. use raw materials 啤塑烘 dry 3 small 时, add water material or gas wet 2~5 month 份焗5H.
5, temperature degree setting: reinforced grade: rear: 210~240℃,
in: 220~250℃,
in: 230~260℃,
front: 240~270℃,
咀: 230~270℃,
模: 30~100℃.
reinforced grade: rear: 240~250℃,
in: 240~260℃,
in: 250~270℃,
front: 260~280℃,
咀: 250~260℃,
模: 50~100℃.
6, machine 筒停留 time: short good (3 separation below/following ).
7, speed important, high speed make products surface relatively 佳.
8, filament speed: can use high speed.
9, products need high degree impact force, most good selection high temperature, low pressure, high mold temperature has thick parts flow increase filling grade gloss.
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