Shanghai Daoqin Plastics Co., Ltd.

摘 need: from injection molding parts machine structure degree analysis precision injection molding parts molding key/critical technology, through 广东泓利 machine has company made 四缸直锁二 sheet/plate injection molding parts machine in light injection molding parts machine formed application, precision, ultra- precision injection molding parts molding important technology indicators, is rear precision, ultra- precision injection molding parts molding technology concept formed and standards made provide 参考. key/critical 词: precision injection molding parts molding 四缸直锁二 sheet/plate light injection molding parts machine standards precision injection molding parts molding technology is 一门涉 and Raw Materials property can, formulation, molding process and equipment and other more comprehensive technology; precision plastics products 包括DVD数码 light 盘, DVD激 light 头, versus machine parts, electrical 脑接插 parts, light guide sheet/plate, non 球面透镜 and other precision product, this category of product significantly features is dimensions degree requirements high, but also for products inner in quality and formed product rate requirements high. molding products injection molding parts mold is 决定该 products can to design requirements dimensions important conditions, precision injection molding parts machine is ensure products in requirements dimensions scope/range inner molding and ensure high formed product rate key/critical equipment. table/sheet 明, products dimensions degree is 由锁模 plant/unit 决定, precision injection molding parts molding technology for injection molding parts machine requirements main/primary has 三 方面: 1, clamping degree requirements high, main/primary 指位置, clamping force heavy degree and sheet/plate 均衡受 force; 2, can low pressure 护模效果, （1）因 is precision molding injection molding parts mold price separation 昂贵, has price high as machine; （2） production add fast, add upper dispersion processing assembly, injection molding parts mold issues formed loss heavy; （3） many product has parts, if parts 放置不当而 low pressure 护模失效会造 formed injection molding parts mold heavy loss bad; 3, mold opening force large, and easy adjustment, clamping requirements long, is many injection molding parts mold not only complex, but also has or separation type 面, remove mold opening force requirements large outer, mold opening 行程也 need long. according to above analysis, clamping plant/unit property can excellent poor for precision injection molding parts molding important. clamping plant/unit from 传动角 degree 讲, generally can separation is 肘杆式（ or machine 铰式） and liquid pressure 式, from force degree 讲, large can separation is sheet/plate and sheet/plate injection molding parts machine. injection molding parts machine is sheet/plate force （如图1 示）, for injection molding parts mold is “顶” function force methods, 肘杆式（ machine 铰式）以 and full electrical 动式, mono or more liquid 式, is this type of function force methods. 肘杆式 for/regarding precision injection molding parts has its 先天 局限 property: 1, processing degree, assembly degree and machine abrasion loss 均会造 formed 肘杆式 clamping degree decline, ring temperature degree for clamping degree 也会造 formed effect/influence, is 肘杆式 clamping force is 靠拉杆 tensile deformation obtain, temperature degree large formed 拉杆 伸 shrink heavy effect/influence clamping force; 2, due to low pressure slow speed rigid good 靠近肘杆式放 large 倍数急剧 upper rise 区域, low pressure slow speed very difficult 掌握, but also 既不灵敏也 difficult adjustment; 3, 肘杆式 mold opening force small, clamping small. above disadvantages, heavy effect/influence 肘杆式 in high machine molding precision product and complex product in application. for/regarding mono combined more liquid 式 说, 拉杆受 force still very long, system rigid degree 差, mono liquid also has clamping force function non-uniform, 锁模油缸容 easy inner and other disadvantages. full liquid pressure sheet/plate injection molding parts machine （如图2 示） and above structure has property difference, its clamping force function in 动, sheet/plate between, is 不承受 force, for injection molding parts mold is types “夹” function force methods, sheet/plate due to function in sheet/plate 四 角 upper is 连通, therefore function in injection molding parts mold 四 角 upper force is versus and other, 定, sheet/plate versus for 应 角 受 force is function force and function force 关系, therefore its force full versus and other, make injection molding parts mold 不平行, can 够自动置位 make injection molding parts mold in separation type upper full combined, injection molding parts mold 四 角八 点 upper force 几乎完 full versus and other, this advantages is other structure injection molding parts machine tool has. for/regarding molding precision products 说, 直锁二 sheet/plate 式锁模 structure clamping degree most high, main/primary is is injection molding parts mold force uniform, clamping force heavy degree high. in injection molding parts molding process in, difference lower: ① from 图3 can 看出, in process in, mold cavity 充满, mold cavity pressure speed degree upper rise most large value （B 点）, injection pressure to most large value. rear, mold cavity pressure decline, injection pressure is holding pressure, use separation grade holding pressure 以适应 this type of 变化. ② due to 四缸直锁 injection molding parts molding machine its pressure can injection pressure rise high rise high 1.5倍, injection rear, pressure decline, in cooling process in maintain certain relatively low pressure, 见图4, from 图5 in 我们也 can to 传统肘杆式 and 四缸直锁式锁模 pressure comparison, due to injection molding parts mold and sheet/plate in force most large time 区域承受 most large clamping force, in process in, 四缸直锁二 sheet/plate clamping force and force 同步变化, unchanged 衡态, 避免肘杆式 that injection molding parts mold long time high pressure, injection molding parts mold generate elastic property deformation amount very small, from has improve/increase products degree. but also decrease/reduce injection molding parts mold, sheet/plate and other force parts long time high pressure fatigue bad. above this advantages make full liquid pressure 四缸直锁二 sheet/plate injection molding parts machine in precision injection molding parts in has performance, structure can by used for light injection molding parts machine in, 广东泓利 machine has company utilizing this type of structure 于2003 year made formed 功我国首台数码 light injection molding parts molding machine, 产CD, VCD, DVD light full combined standards. can make in degree requirements most light injection molding parts molding technology in, full liquid pressure 四缸直锁二 sheet/plate still can 胜任, for/regarding generally precision products 说, its property can 自然不言而喻. precision injection molding parts molding technology in 我国塑 machine industry development stage/phase, versus in dry year inner has long development, therefore, in China machine high market is outer injection molding parts processing 厂垄断 情况 lower, in precision machine technology also has formed standards lower, precision injection molding parts molding technology concept and certain standards, for rear precision injection molding parts molding technology development will has important 参考价 value. in 此, 本人愿抛砖引玉, 提出一 看 method. combined for precision injection molding parts molding technology long 期 实践 experience, 本人认 is, generally precision injection molding parts machine has indicators: is products dimensions heavy 复误差, is products heavy weight 误差. front due to dimensions large small and products thick thin different difficult comparison, rear table/sheet injection molding parts machine comprehensive water 平, generally injection molding parts machine weight heavy 复误差 in 1％ left right, relatively good machine can to 0.8％, low 于0.5％ is precision machine, low 于0.3％ is ultra- precision machine, front material 报道, most high water is small 于0.15％, 2004 year Germany 科隆塑 machine expo upper, Germany company its most new injection molding parts machine weight heavy degree can to 0.07％. precision injection molding parts machine requirements products dimensions degree generally in 0.01-0.001mm inner, many precision injection molding parts also requirements injection molding parts machine tool has high injection pressure, high injection speed degree; requirements clamping system tool has large rigid property and high 锁模精 degree, 谓锁模精 degree is clamping force uniform property, can 调, stability and heavy property high, clamping 位置精 degree high; requirements for pressure, amount, temperature degree, amount and other can control to versus 应 精 degree, using/adopting more grade or grade injection, ensure molding process again conditions and products heavy degree and other. for precision injection molding parts machine specific requirements has: （1） injection pressure ≥250MPa; （2） injection speed degree ≥300mm/s; （3） products dimensions degree 0.001mm; （4） products quality standards 差系数（变化 rate ）≤0.1％; （5）开, clamping 位置精 degree: 开≤0.03mm, combined ≤0.01mm; （6） injection 位置精 degree （ holding pressure 终止点）≤0.03mm; （7）拉杆受 force degree ≤1％; （8）预塑位置精 degree ≤0.03mm; （9）定, sheet/plate balanced degree; A: clamping force is 零时≤0.03mm, B: clamping force is most large 时≤0.005mm; （10） machine 筒, screw temperature degree ≤±0.5℃. precision injection molding parts molding technology focus/key point research inner 容: （1） clamping force: in precision injection molding parts molding process in, generally need very high injection pressure （>250MPa）, very difficult molding, 但我们就应该 attention/notes to, precision injection molding parts products outer dimensions, thick degree positive 常情况 lower comparison small, therefore, for clamping force is has products requirements very high, 反之, clamping force large, or 四角受 force 不均, or clamping force unstable make injection molding parts mold pressure deformation 不一致 and non-uniform, most effect/influence to products molding quality. according to injection molding parts products process requirements, combined 理, 方便, adjustment clamping force, 克服肘杆式, electrical injection molding parts machine 锁模部 parts due to manufacturing degree effect/influence 连杆受 force and force parts long time force deformation and other causes long degree dimensions 差异（如肘杆, and other ）以 and room temperature, injection molding parts mold temperature degree and other clamping force unstable property issues, therefore, how to full liquid pressure 式锁模 structure density high advantages is precision injection molding parts machine in the future time inner research important 课题. （2）塑化 quality: plastics uniform property not only effect/influence to parts molding quality, also effect/influence to melt plastics through gate 时 受 retardant force large small, is to uniform 塑化, design specialized screw and use specialized increase technology can less. another, machine temperature degree 也应精确 control, in screw, machine temperature degree more using/adopting PID control （ ratio/proportion, micro separation, separation ）, degree can control in ±0.5℃～±l℃, basic can meet/satisfy precision injection molding parts requirements, if using/adopting FUZZY control methods, more combined precision injection molding parts. （3）计 amount degree: need make plastics products maintain relatively high stability property, 每次注入 mold cavity hot plastics must versus and other, is 说每次 add material screw 复位精 degree requirements 一致, 但事实 upper screw 复位时 位置 is can can full 一致, screw 直径越 large, system property 就会越 large, 位置精 degree difficult control, generally screw 复位精 degree control in 0.3mm以 inner, most good can control in 0.2mm inner. （4） injection speed degree: injection speed degree is degree injection molding parts machine important indicators, is hot melt plastics from 开始注入 mold cavity to formed filling between has 一段时差, in this time in, hot melt plastics 即开始 cooling, is make gate and injection molding parts mold type inner material uniform cooling, 就应采取 high speed injection, need improve/increase injection speed degree, must 配置一 or several can fast speed can amount can device shrink short 时差. will injection speed degree improve/increase 3倍 above, to 300～800mm/s, this for precision injection molding parts non has 利. （5） injection pressure: precision injection molding parts need relatively large injection pressure, improve/increase parts degree, decrease small shrinkage deformation, ensure made parts degree, 但并不 is injection pressure large good, pressure large generate flash, in most injection pressure lower, injection cycle time 变化应不 ultra- 0.05 秒. （6） holding pressure: holding pressure for degree parts effect/influence large, 准确 说, holding pressure can relatively good shrink, decrease small parts deformation, control parts degree, holding pressure pressure stability 决定 塑 parts molding degree, screw 终止位置不变 is holding pressure 效果 决定 factors. （7） injection molding parts mold temperature degree: for precision injection molding parts 说, mold cavity surface temperature degree 变化应 control in ±1℃之 inner, this must using/adopting PID control, for ultra- precision injection molding parts 而言, this is 不够, more methods is using/adopting FUZZF control, 即模糊 control. 随 科技 day 益进步, plastics products especially is precision plastics products will has more add vast development 空间, 我国塑 machine industrial relatively 晚, thin low, and 德, day and other 发达国家 has 一定 差距, 但依照当今 development 势头, 估计赶 ultra- world time 不会太 long, therefore, for belongs to high product precision machine and formed 统一认识, and made has standards, for rear industry development will generate important effect/influence. Shanghai plastics has company