MOULDING TROUBLE SHOOTING GUIDE(注塑缺陷处理指南) | ||
FAULT缺陷 | POSSIBLE CAUSES可能原因 | REMEDIES解决措施 |
Silver streaking银纹 | ∙Mixture of coar and fine granules 粗细颗粒混合 ∙Non uniform plastic temperature 不一致的塑料温度 ∙Exceeding plasticizing capacity 超出塑化能力 ∙Air tapped between the granules at the hopper end ∙Intermitent flow in the cavity 模腔内间歇流动 ∙Injection speed too fast 注射速度过快 ∙Mould temperature too low 模温过低 ∙Injection pressure too high 注射压力过高 ∙Moisture and volatiles in the material原料湿度大 ∙Material too hot 原料太热 ∙Contamination of foreign material 混料 ∙Gates and runners too small 流道和水口太小 ∙Excessive condensate/ lubricants on the mould material型腔表面有油污或冷凝物 ∙Adjust injection rate调节注射速度 | ∙ U uniform granulation 使用统一的颗粒 ∙ Reduce temperature of nozzle降低管口/喷嘴温度 ∙ Preheat material 预热原材料 summer snow∙ Reduce rear cylinder temperature and u uniform granulation 降低后料桶温度，使用统一的颗粒 ∙ Balance gate position , relocate gates,平衡流道位置，重新定位流道 ∙ Vent Mould, reduce injection pressure, reduce cylinder temperature在模具上开口，减少注射压力，降低料桶温度 ∙Increa mould temperature增加模温 ∙Reduce injection pressure降低注射压力 ∙Preheat the material adequately, u a hopper dryer充分预热原材料，使用漏斗干燥机 ∙Decrea the mould cycle time, decrea the cylinder temperature减少模具周期时间，降低料桶温度 ∙Check the moulding powder for contamination , check the feed system, purge the cylinder, Check the regrind content and quality.检查混料粉末，检查灌注系统，净化料桶，检查回用料的组成和质量 ∙Increa the size of the runner and the gates. 增大水口和流道的直径 ∙Wipe the mould , u lesr quantity of lubricants, change the lubricant and try 擦模，减少脱模剂使用，更换脱模剂试验 ∙Increa or decrea the injection rate. 增加或降低注射速度 |
Black streaks 黑纹 | ∙Frictional heat caud by movement of cold granules past one another 冷料运动引起的摩擦热 ∙Air trapping in the mould 排气不良 ∙Plunger off-center causing friction burning of material 顶针摩擦热烧坏材料 ∙Contamination污染 | ∙ U external indication, increa rear cylinder temperature , vent mould properly, relocate gates. 增加注射口温度，正确释放模具，重新定位流道 ∙Reduce injection pressure. 降低注射压力 ∙Relocate plunger 重新定位顶针 ∙Purge the cylinder清理料桶 |
Short shots 缺料 | ∙Cold material 料温低 ∙Cold mould 冷模 ∙Insufficient pressure 压力不足 ∙Insufficient feed不足的进料 ∙Poor venting排气不良 ∙Insufficient plunger forward time 活塞前进时间不足 ∙Insufficient injection speed注射速度不足 ∙Improper balance of plastic flow in multiple cavity moulds.多穴模具中塑料流动失衡 ∙Insufficient feeding加料不足 applicable∙Melt flow restricted熔体流动受限 ∙Back pressure in cavity 模具背压 ∙Unbalanced runner design 不平衡的水口设计 ∙Cold slug clogging gates, runners and sprue. 冷料堵塞流道、水口等 ∙Un uniform mould temperature 模温不合理 ∙Un uniform melt cushion 熔融保护不合理 ∙Machine capacity not enough 设备吨位不足 | ∙ Increa plastic temperature提高塑料件温度 ∙ Increa mould temperature增加模温 ∙ Increa pressure and temperature 增加压力和温度 ∙ Increa feed 增加进料量 ∙ Increa number and size of vents增加排气口数量和大小 ∙ Increa plunger forward time. 提高活塞前进时间 ∙ Increa injection speed 提高注射速度 ∙ Correct unbalanced coixlition 纠正流动不均衡情况 ∙Check the material in the hopper, check the feed throat for resin agglomerates, machine capacity not enough 检查料斗里的原料,检查注料口熔料是否结块，设备能力是否足够 ∙Increa the gate, runner, and sprue size, u the nozzle with a higher diameter hole, try with a higher MFI material, check the nozzle for blocks. 增加流道、水口、注射口尺寸，更换高MFI材料，检查喷嘴 ∙Provide adequate venting, reduce the clamping force. 加强通风，减小锁模力 ∙Balance the runner design , cavity location 平衡水口设计、型腔定位 ∙Increa the size of cold slug well, provide cold well for sub runners. 增加冷料阱，为分水口设计冷料阱 ∙Rearrange the cooling line of mould to provide a uniform cooling 均匀冷却（重新安排冷却温度） 英语四级模板∙Maintain a uniform melt cushion, check the back flow valve and, repair if needed 维持熔融垫的均衡，检查并修复背流值 ∙U a bigger machine.使用较大设备 |
Flash批锋 | ∙Material too hot 料温太高 ∙Excessive feed 加料过多 ∙Erratic feed加料不稳定 ∙Poor parting line or matting surface合模线或分型面不良 ∙Erratic cycle time注射周期不稳定 ∙Injection pressure is too high注射压力过高 ∙Insufficient clamping force 锁模力不足 ∙Foreign matter or flash acting as high spot on mould land. 模面杂质 ∙Mould platens are warped , Clearance in vents, knock-outs, etc. are too great 模芯歪、排气口间隙，模芯破坏等 ∙Insufficient venting causing material from cavity to flow out通风不足引起原料从模腔流出 ∙Injection pressure unevenly distributed in the mould模具中的注射压力分配不均 | ∙ Reduce material temperature, increa cycle time, decrea mould temperature 降低料温，增加循环时间，降低模温 ∙ Reduce feed 少加料 ∙ Check the feeding system. 检查加料系统 ∙ Reface the parting line , matting surface 抛光分型面、合模线 ∙ Maintain uniform cycle time. 稳定注塑周期 ∙ Decrea the injection pressure, decrea the hold on pressure, decrea the injection hold time, 降低注射压力、保压压力注射时间 ∙ U wherever necessary bigger machine if available, reduces number of cavities; adjust the mechanism to increa the clamping force. 尽可能使用较大设备，减少模腔数量，调节机械装置以增加锁模力 ∙ Inspect mould land and clean carefully. 检查清理模腔表面 ∙Check the clearance and adjust 检查调整间隙 ∙Inspect vents and clean in ca of blockage, enlarge vents, if needed. 检查并清理通风口以防堵塞，如有必要，扩大通风口 ∙Cavity and runner layout should be balanced 平衡型腔以及水口分布 |
Sprue sticking分流道粘连 | ∙Excessive pressure 压力过大 ∙Nozzle not aligned with sprue bush 喷嘴未与注入口尘套并排 ∙Sprue puller too small 衬套太小 ∙Material too cold at nozzle and sprue unable to breakaway.喷嘴处料温过低，分流道不能分流 ∙Nozzle orifice greater than sprue bush orifice.喷嘴口大于分流道口 ∙Material too hot, Sprue breaking at component end. 料温太热，喷嘴尾部结构损坏 ∙Sprue held up in sprue bush due to inadequate taper 因锥度不合适导致注料口卡住 ∙Hot material , 料温过热 ∙Excessive material 料过多 ∙Insufficient draft 气流不足 ∙Improper fit between sprue bushing and nozzle.分流道衬套和喷嘴装配不当 ∙Under cuts or rough surface.底切或表面粗糙 ∙Long plunger dwell 保压过长 | ∙ Reduce pressure 减小压力 ∙ Realign the nozzle with a sprue bush. 重新排列喷嘴与sprue bush ∙ Increa the undercut, Increa the size of sprue puller. 增大底切，增大衬套 ∙ Increa the nozzle temperature until the sprue breaks from the nozzle. 提高喷嘴温度，直到注射畅通 ∙ Change the nozzle with a lower Dia orifice or increa the dia of sprue bush orifice 将喷嘴口直径变小，或者加大分流道口的直径 ∙ Decrea the cylinder temperature, increa the molding cycle time, and increa the cooling time in the mould.降低料桶温度，增加注塑周期时间，增加模具冷却时间 ∙ Give adequate taper in the sprue bush, u mould relea agents, remove burrs on the sprue. 使用模具脱模剂，去除分流道上的芒刺 ∙ Decrea material temperature. 降低料温 ∙ Decrea size of the sprue extended nozzle and short sprue bushing 减小喷嘴尺寸，缩短注射衬套 ∙ Increa draft angle. 加大气流角度 ∙ Hole size in nozzle should be smaller than in the sprue bushing. 喷嘴上孔的尺寸应小于分流道bushing孔 ∙ Eliminate undercuts and polish the surface. 消除底切，打磨表面 ∙ Reduce plunger forward time 降低保压时间 |
Sink marks缩痕 | ∙Not enough plastic in the mould to allow for shrinkage due to thick ctions, boss, ribs etc. 缺料导致细小结构收缩 ∙Not enough feed 注料不足 ∙Injection pressure too low 注射压力太低 ∙Plunger forward time to short ∙Unbalanced gates 水口不均衡 ∙Injection speed too slow注射速度过低 ∙Plastic too hot 原料过热 ∙Variation in mould open time 模具开放时间变差 ∙Excessive cushion in front of the plunger缓冲垫过长？ ∙Gate location, it’s size and design 进胶口的设计尺寸、定位 ∙Insufficient packing. 密封不良 ∙Part ctions uneven 结构不均匀 ∙Product too hot when ejected. 脱模时温度过高 ∙Restriction in flow 流动限制 ∙Local hot spot in the moulds. 模具局部过热 | ∙Redesign and increa injection pressure 重新设计，增加注射压力 ∙Increa feed 增加注入 ∙Increa injection pressure.增加注射压力 ∙Increa plunger forward time. ∙Restrict flow through gates near sprue. 限制分流道附近的水口流量 ∙Rai mould and cylinder temperature 提高模具和料桶温度 ∙Reduce cylinder and mould temperatures, decrea cycle time. 降低料桶和模具温度，减少循环时间 ∙U of timers for mould open time使用计时器控制模具开放时间 ∙Reduce feed 减少注入 ∙Locate the gate at the thick ction of the part, increa the gate size and reduce gate land 定位进胶口在薄壁位置，增大进胶口，缩短胶口长度（） ∙Increa the injection pressure. 增加注射压力 ∙Increa the hold pressure time, check back the flow valve for leakage.增加保压时间，检查背流阀是否有泄漏 ∙Redesign the part with an even wall thickness 重新设计模具，达到壁厚均匀 ∙Decrea the cylinder temperature, increa the cooling time in mould, reduce the mould temperature. 降低料桶温度，增加模具冷却时间，降低模温e的过去分词 ∙Increa the gate, runner and sprue size, provide a proper venting in the mould, balance flow and filling in cavity. 加大水口、流道、分流道尺寸，使模具适当通风，平衡流量和模腔填注量 ∙Redesign the cooling pattern in the mould 重新设计模具的冷却方式 |
Part sticking to the mould.部件与模具粘连 | ∙Injection pressure or cylinder temperature too high 注射压力或料桶温度太高 ∙Excessive feed 过多注入 ∙Plunger forward time too long 活塞前行时间太长 ∙Undercuts in mould 模具底切 ∙Variation of mould open time 开模时间变动过大 ∙Improper finish 表面状态不合适 ∙Rough surface of the mould模具表面粗糙 ∙Inadequate relea taper in mould cavity. 不充分的脱模斜度 ∙Ejection system not designed properly 喷射系统设计不良 ∙Undercuts in the mould cavity.模腔底切 ∙Misalignment of core and cavity中心和模腔未对准 ∙Mould made of soft porous steel. 模具材料为软钢 ∙Overpacking of the plastic material. 塑料材料 ∙Uneven pressure in cavities. 模腔压力不均 ∙Parts sticking to injection side. 产品粘在定模上 ∙Mould deposit causing sticking模腔堆积引起粘模. | ∙Reduce pressure or temperature accordingly 相应地减少压力或温度 ∙Reduce feed 减少注入 2013年12月六级作文∙Reduce plunger forward time. 减少活塞前行时间 ∙lady gaga mp3Eliminate undercuts, polish and provide sufficient draft 去除底切，抛光，提供充足的注射量 ∙Maintain constant mould open time. 保持一致的开模时间 ∙Polish rough cavity surface to correct finish, adjust mould temperature to obtain proper shrinkage 打磨粗糙的模腔表面以纠正表面状态，调节模温以获取合适的收缩 ∙Polish the mould well 打磨模具 ∙Provide a relea taper 提供脱模斜度 ∙Check the ejector system , provide extra ejector pins 检查注射系统，提供额外的注射针 ∙Eliminate undercuts with a proper design, polish and provide sufficient draft. 通过正确的设计抛光打磨来消除底切 ∙Check the alignment of the core and cavity.检查中心和模腔是否对准 ∙Replace the mould with a hardened metal. 使用硬钢材料的模具代替 ∙Reduce the injection pressure, reduce the feed material, reduce the screw forward time. 减少注射压力，减少原料注入量，减少螺杆前行时间 ∙Maintain a constant feed cushion, balance the gates and runner for uniform filling. 保持持续的螺杆速度平衡流道、水口来均匀填充 ∙U a mold relea spray, adjust the mould temperature to retain the components on the ejection side. u an undercut runner to keep the parts on the ejection side 通过模具释放来调整模具温度，或增加水口底切，来保证产品在动模上 ∙Check and clean the mould deposits.检查清除模腔堆积 |
Flow lines and folds流纹，分层 | ∙Cold material 冷料 ∙Cold mould 冷模 ∙Gates to small 水口太小 ∙Non uniform ction thickness.不合适的结构厚度 | ∙ Increa plastic temperature 增加塑料温度 ∙ Increa mould temperature 增加模温 ∙ Enlarge gates. 加大水口 ∙ Eliminate heavy boss and ribs.去除较大的突起和筋位 |
Poor surface finish 外观不良 | ∙Cold material冷料 ∙Cold mould冷模 ∙Slow injection 注射慢 ∙Poor flow within mould cavity 型腔内流动性差 ∙Poor mould cavity finish 型腔表面不良 ∙Contamination of material混料 ∙Material wet 原料潮湿 ∙Mould surface too cold模温过低 ∙Poor mould surface模具表面粗糙 ∙Inadequate injection pressure. 注射压力不足 ∙Insufficient hold pressure time.保压时间不足 | ∙ Increa plastic temperature 增加料温 ∙ Increa mould temperature增加模温 ∙ Increa injection speed. 增加注射速度 ∙ Redesign parts. 重新设计产品结构 ∙ Polish mould cavity surface to correct finish 打磨模腔表面 ∙ Check the feed material for contamination, purge the injection cylinder, clean the feeding system, check the quality of regrind added检查注入材料防止混料，净化注射料桶，清洗注入系统，检查添加的再生料的质量 ∙ Preheat the material, u hopper dryer 预热原料，使用漏斗干燥器 ∙ Increa the mould surface temperature 增加模具表面温度 ∙ Polish the mould 打磨模具 ∙ Increa the injection pressure 增加注射压力 ∙ Increa the hold pressure time 增加保压时间 |
Warpage变形 | ∙Excessive orientation in the material which manifests itlf in differential shrinkage in the direction of flow and vertical to it. Orientation increas as material becomes too viscous, the wall becomes thinner, runner becomes narrower and longer 原料的收缩方向性不同，这种方向性在材料变粘，壁厚变薄，流道变长变细时增加 ∙Temperature distribution in cylinder is uneven炮桶温度分布不均 ∙As a result of over – loading of moulding due to excessive or too long follow up pressure 因压力过大导致的模具过载 ∙Components ejected too hot 注射时过热 ∙Port design with uneven thickness 产品设计壁厚不匀 ∙Mould coating uneven 模具表层不匀 ∙Distortion due to internal strain 由于内部张力导致扭曲 ∙Ejection knockout pins working unevenly. 顶针工作不正常 ∙Gate location not proper水口位置不合适 ∙Distortion of heavy ction only. 大件变形 | ∙ Avoid orientation 消除收缩的方向性不同 ∙Watch cylinder design 注意料桶设计 ∙If possible u follow –up pressure lower than injection pressure, shorten follow–up pressure. 可能时使用低于注射压力的后续压力，缩短后续压力 ∙Reduce the cylinder temperature, increa the mould cooling time, place in the jig after moulding, and increa the mould temperature. 降低料桶温度，增加模具冷却时间，成型后放置一夹具，提高模温 ∙Design the part with an even wall thickness and strengthen it with ribs. 设计产品时应壁厚均匀、通过筋位加强结构 ∙Maintain a uniform temperature in the mould, u a cold mould. 保持模温一致，使用冷模 ∙Increa / decrea the injection pressure, increa the mould cooling time, increa the overall moulding cycle.加大/减小注射压力，增加模具冷却时间，增大成型周期 ∙Check the knock out pin levels and t evenly, increa the knock out area. 检查并调整顶针水平，提高下陷位置 ∙Gate location should be in such a way that the material flows from the thick to thin ction, gate runner system design for balanced filling. 水口位置应当利于原料从较粗部位流到较细部位，水口流道系统设计应利于平衡注入 ∙Increa the mould cooling time, maintain uniform melt temperature, slowly cool the part in warm water, place in a shrink jig after ejection. 增加模具冷却时间，保持统一的熔温，缓慢地在温水中冷却部件，射出后放置一个收缩夹具 |
Fracture cracks脆裂 | ∙Internal stress due to metal inrts with coefficient of thermal expansion different from the plastic material.（金属镶块使同胶料的热膨胀系数不同导致的内应力） ∙Internal stress due to improper mould design（不正当的模具设计导致的内应力） ∙Embrittement due to thermal degradation（热降解导致的脆化） ∙Parts ejected too fast（局部注射过快） ∙Ejector system defective.（排出系统缺陷） ∙Internal stress due to cold metal inrt（模具冷却导致内应力）. | ∙U higher molecular weight materials, increa wall thickness, and anneal the molded parts.（使用高分子原料、增加壁厚、注塑件退火） ∙Check the mould design and change if necessary.（评估模具设计必要时更改设计） ∙Reduce the cylinder temperature, u faster molding cycle.（降低炮筒温度、缩短产品周期） ∙Give more cooling time in the mould. （提高冷却时间） ∙Check the ejection system for a smooth operation.（保持顺畅的排气） ∙Warm the inrt before u, thicken the ction in the area of crack, u toughened materials.（模具预先升温、在易断裂区域增加壁厚、使用强度更高的原料） |
Brittleness of component（脆化） | ∙Material is too hot（原料过度加热） ∙Material too cold（原料过度冷却） ∙Mould surface too cold （模温过低） ∙Reground material in excess quantity （粉碎料过多） ∙Bad quality regrind （劣质的粉碎料） ∙Rate of injection too slow （射速过低） ∙Original part design too thin （设计结构薄弱） ∙Product not conditioned 产品条件不良 | ∙Reduce the cylinder temperature, shorten the over all cycle time, machine is too big, change to a smaller machine.（降低炮筒温度、缩短周期时间、机台过大、更换小机台） ∙Increa the cylinder temperature, increa the nozzle temperature, decrea the screw speed,（增加周期时间、增加喷嘴温度、降低螺杆转速） ∙Increa the mould temperature, control the flow of coolant to the mold（增加模温、控制模具冷却系统） ∙Avoid using regrind, u less percentage of regrind（避免使用再生料、降低再生料添加比例） ∙Check regrind for contamination, moisture degraded polymer, check the regrind melt index.（确认再生料被污染、存储条件潮湿导致的降解、测试再生料的熔融指数） romary什么意思∙Increa the injection rate, maintain the minimum feed cushion.（增加注射速度、保持最小的缓冲垫 ∙Redesign the part to strengthen the weak areas（更新产品结构、加强薄弱区域的结构强度） ∙Condition the part as per the raw material manufacturer's recommendation.（按照原料供应商的工艺条件生产） |
Bubbles and voids（气泡、注塑不足） | ∙Internal shrinkage after the outer surface ts（注塑后内部缩孔） . ∙Material too hot（原料温度过高） ∙Insufficient venting in the mould resulting in entrapment of air （模具排气不良、注塑过程中气泡） ∙Condensation on cavity surface（缩水） ∙Moisture in material（原料潮湿） ∙Injection rate to fast（射速过快） ∙Restriction to flow of material（胶料流动慢） | ∙ Increa the injection pressure, rate, time, Increa the size of the gates, runners, and sprue, increa the screw forward time.（增加注射压力、速度、时间 增加水口、流道、分流道尺寸 增加螺杆转速时间） ∙ Decrea the cylinder temperature, reduce the moulding cycle time.（减少炮筒温度、缩短注塑周期） ∙ Provide vents at the point of final fill, decrea the injection speed, decrea the mould clamping force, increa the gate size, change location.（产品注射末端加排气、减小注射速度、减小锁模力、加大水口尺寸或改变位置） ∙ Reduce the flow of coolant through the mould, wipe the cavity surface with a solvent （降低冷水、使用溶剂擦拭腔体表面） ∙ Preheat the material thoroughly, u hopper dryer （原料充分干燥） ∙ Decrea the injection rate（降低注射速率）. ∙ Eliminate restrictions, increa the gate and runner size. （加大水口、流道尺寸） |
Discoloration（污点、变色） | ∙Contamination of material（原料杂质） ∙Wet material（原料潮湿 ∙Degradation of material, colorant, additives （染色剂、助剂降解） ∙Degradation of material due to gas entrapment 因空气残留而降解 ∙Too much stress on component （产品内应力太大） ∙Charred material in cylinder or nozzle coming out with material.（原料炮筒内停留时间过长） | arrival∙ Check the moulding material, purge the heating cylinder, check the feed system and hopper（确保原料及添加系统的清洁） ∙ Preheat the material, u a hopper dryer （原料充分干燥） ∙ Decrea the overall moulding cycle, u small machine, check the residence time of the material, reduce the screw speed, u colorants and additives which will withstand processing temperature.（减少成型周期、使用小机台、确认原料存储时间、确保色剂、助剂高温下不变性） ∙ Provide proper ventings, relocate the gates, and decrea the mould clamping force.（适当的排气、从新设计水口、降低锁模力） ∙ Check the ejection system（确认注射周期） ∙ Purge the cylinder completely, remove and clean the nozzle.（清洁炮筒、喷嘴） |
Nozzle dropping and foaming 喷嘴流涎、起泡 | ∙Nozzle temperature very high（喷嘴温度过高） ∙Material too hot （料温过高） ∙Nozzle orifice too large.（喷嘴口尺寸过大） ∙Moisture in the material. （原料潮湿） | ∙ Decrea the nozzle temperature,（降低喷嘴温度） 英文职位名称∙ Decrea the cylinder temperature, decrea the cylinder moulding time（降低炮筒温度、降低成型周期） ∙ U a nozzle with a small orifice, u the rever taper nozzle, u a nozzle with shut off valve.（使用小口径喷嘴、使用小锥度喷嘴、使用切断真空管喷嘴） ∙ Preheat the material, u hopper dryer （充分干燥） |
Scorching 烧焦 | ∙Material over heated原料过热 ∙Thermocouple burnt out 热电偶烧灼 ∙Temperature controller malfunctioning 温控系统故障 ∙Regrind not of good quality.再生料质量差 ∙Improper shutdown procedures. 不合适的关机程序 ∙Moisture in material 料湿 ∙Gas entrapment ∙Rate of injection too fast 注射速度过快 ∙Constant degrading 持续降解？ | ∙ Reduce the cylinder temperature, decrea the moulding cycle time, and remove dead spots in the cylinder, screw, and nozzle asmbly. 降低料桶温度，减少成型周期，清楚炮筒内的焦料 ∙ Check all thermocouples and change, if necessary. 检查所有热电偶，如有必要，进行更换 ∙ Check for the sticking of relays, check for the controllers connected to the wrong heaters, check if the relays are functioning properly. 检查继电器是否连接、工作正常 ∙ Segregate and check regrind critically for contamination, excess moisture or degraded polymer. 隔离并检查再生料，以防混料、料湿或劣质材料混入 ∙ Purge the machine thoroughly, clean the nozzle and start moulding afresh彻底清洗设备，清洗喷嘴，重新注塑 ∙ Preheat the material , u a hopper dryer 预热原料，使用漏斗干燥机 ∙ Vent the cavities properly, relocate the gate position, 模腔适当通风，重新布置水口位置 ∙ Decrea the injection speed, decrea the injection pressure, increa the size of gates. 降低注射速度，降低注射压力，增加水口大小 ∙ U a colorant which can withstand the processing temperature, 使用耐高温着色剂 |
Weld lines.熔接线 | ∙Material too cold 料温太低 ∙Mould too cold 模温太低 ∙Injection pressure too low 注射压力太低 ∙Gas entrapment 气体残留 ∙Part too thin at weld 产品太薄 ∙Capacity of the machine lower 设备能力低 ∙Contamination of material混料 ∙Poor flow of melt 熔胶流动性差 | ∙ Increa the cylinder temperature, increa the overall moulding cycle 提高料桶温度，增加整个成型周期 ∙ Increa the mould temperature, throttle the flow of coolant in the mould 增加模温，限制模具冷却剂的流动 ∙ Increa the injection pressure, increa the screw forward time, increa the rate of injection, increa the size of gates, runners and sprue, u multiple gates and runners.加大注射压力，增加螺杆前行时间，增加注射速度增加水口、流道、分流道的大小，使用多个水口和流道 ∙Provide vent in cavities, relocate the gate, decrea the mould clamping force. 在模腔中设通风口，重新布置水口，减少锁模力 ∙Thicken the part at the weld line 在熔接线附近增加壁厚 ∙Change to a bigger machine. 改用较大设备 ∙Check the material, check the feeding system.检查物料，检查加料系统 ∙U a higher MFI material, u an external lubricant 使用高MFI材料，使用脱模剂 |
Dimensional variations尺寸问题 | ∙Inconsistent moulding cycle 成型周期不一致 ∙Feeding system malfunctioning particularly in the plunger type machines.注入系统故障，多发于活塞型设备 ∙Inconsistent melt cushion while injection 注射缓冲垫（长度）不稳定 ∙Malfunctioning of non return valve 止逆阀故障 ∙Uneven back pressure adjustment 背压调节不均 ∙Malfunctioning of temperature control system.温控系统故障 ∙Insufficient plasticizing capacity成塑能力不足 ∙Incorrect runner, gate dimensions 错误的流道、水口尺寸 ∙Uneven mould filling 填充过程不稳定 ∙Distortion during ejection 注射变形 ∙Incorrect mould dimensions 模具尺寸不正确 ∙Un uniform mould temperature 模温不均 ∙Packing of cavity not enough. 模芯固定不良 | ∙Maintain uniform moulding cycle保持一致的成型周期 ∙Check the feed system and adjust for uniform feed. 检查和调节注入系统，以使注入量一致 ∙Maintain a uniform melt cushion, check the non-return valve for wear and tear. 保持一致的缓冲垫值，检查并修正止逆阀磨损情况 ∙Check and replace the valve if necessary 检查，必要时换阀 ∙Arrange for a uniform backpressure. 统一背压 ∙Check the heater bands, check the thermocouples. 检查加热带、热电偶 ∙U bigger machine 使用较大设备 ∙Check and provide a proper runner gate system. 检查，使用合适的流道水口系统 ∙Design the mould for uniform filling of cavities. 设计模具使模腔均衡填充 ∙Check the knock-out pin system and correct it 检查修正顶针系统 ∙Machine the mould cavity and core for proper dimensions with proper allowances for shrinkage. 检查模腔、模芯的尺寸、 ∙Maintain a uniform mould temperature 保持统一的模温 ∙U a higher injection pressure. Increa the screw forward time.使用较高的注射压力，加长螺杆前行时间 |
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