注塑专业用语

MOULDING TROUBLE SHOOTING GUIDE(注塑缺陷处理指南)

FAULT缺陷

Silver

streaking银纹

POSSIBLE CAUSES可能原因

• Mixture of coarse 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

REMEDIES解决措施

• Use 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

• Reduce rear cylinder temperature and use 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

• Increase mould temperature增加模温

• Reduce injection pressure降低注射压力

• Preheat the material adequately, use a hopper dryer充分预热原材料，使用漏斗干燥机

• Decrease the mould cycle time, decrease 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

• Increase the size of the runner and the gates. 增大水口和流道的直径

• Wipe the mould , use lesser quantity of lubricants, change

the lubricant and try 擦模，减少脱模剂使用，更换脱模剂试验

• Increase or decrease the injection rate. 增加或降低注射速度

Black

streaks

黑纹

• Frictional heat caused 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

• Use external indication, increase 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

• Increase plastic temperature提高塑料件温度

• Increase mould temperature增加模温

• Increase pressure and temperature 增加压力和温度

• Increase feed 增加进料量

第1页，共10页

MOULDING TROUBLE SHOOTING GUIDE(注塑缺陷处理指南)

FAULT缺陷 POSSIBLE CAUSES可能原因

• 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

• 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

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 outREMEDIES解决措施

• Increase number and size of vents增加排气口数量和大小

• Increase plunger forward time. 提高活塞前进时间

• Increase 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

• Increase the gate, runner, and sprue size, use 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

• Increase 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）

• 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

• Use a bigger machine.使用较大设备

• Reduce material temperature, increase cycle time,

decrease 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

• Decrease the injection pressure, decrease the hold on

pressure, decrease the injection hold time, 降低注射压力、保压压力注射时间

• Use wherever necessary bigger machine if available,

reduces number of cavities; adjust the mechanism to increase

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 case of blockage, enlarge vents,

第1页，共10页

MOULDING TROUBLE SHOOTING GUIDE(注塑缺陷处理指南)

FAULT缺陷 POSSIBLE CAUSES可能原因

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

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

Sink marks缩痕

• Not enough plastic in the mould to

allow for shrinkage due to thick

sections, bosses, 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

第1页，共10页

REMEDIES解决措施

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

• Reduce pressure 减小压力

• Realign the nozzle with a sprue bush. 重新排列喷嘴与sprue

bush

• Increase the undercut, Increase the size of sprue puller.

增大底切，增大衬套

• Increase 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 increase 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

• Decrease the cylinder temperature, increase the molding

cycle time, and increase 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, use mould release

agents, remove burrs on the sprue. 使用模具脱模剂，去除分流道上的芒刺

• Decrease material temperature. 降低料温

• Decrease size of the sprue extended nozzle and short sprue

bushing 减小喷嘴尺寸，缩短注射衬套

• Increase 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

• Redesign and increase injection pressure 重新设计，增加注射压力

• Increase feed 增加注入

• Increase injection pressure.增加注射压力

• Increase plunger forward time.

• Restrict flow through gates near sprue. 限制分流道附近的水口流量

• Raise mould and cylinder temperature 提高模具和料桶温度

• Reduce cylinder and mould temperatures, decrease cycle time.

降低料桶和模具温度，减少循环时间

• Use of timers for mould open time使用计时器控制模具开放时

MOULDING TROUBLE SHOOTING GUIDE(注塑缺陷处理指南)

FAULT缺陷 POSSIBLE CAUSES可能原因

• 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 sections 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

间

• Reduce feed 减少注入

• Locate the gate at the thick section of the part, increase

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（）

• Increase the injection pressure. 增加注射压力

• Increase 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

• Decrease the cylinder temperature, increase 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

• Increase 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 release 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

• Reduce pressure or temperature accordingly 相应地减少压力或温度

• Reduce feed 减少注入

• Reduce plunger forward time. 减少活塞前行时间

• Eliminate 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 release 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，减少原料注入第1页，共10页

REMEDIES解决措施

MOULDING TROUBLE SHOOTING GUIDE(注塑缺陷处理指南)

FAULT缺陷 POSSIBLE CAUSES可能原因

• 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.

Flow lines

• Cold material 冷料

and folds流纹，分层

• Cold mould 冷模

• Gates to small 水口太小

• Non uniform section thickness.不合适的结构厚度

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

Warpage变形

• Excessive orientation in the

material which manifests itself

in differential shrinkage in the

direction of flow and vertical to

it. Orientation increases 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

• Increase plastic temperature 增加料温

• Increase mould temperature增加模温

• Increase 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, use hopper dryer 预热原料，使用漏斗干燥器

• Increase the mould surface temperature 增加模具表面温度

• Polish the mould 打磨模具

• Increase the injection pressure 增加注射压力

• Increase the hold pressure time 增加保压时间

• Avoid orientation 消除收缩的方向性不同

• Watch cylinder design 注意料桶设计

• If possible use 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, increase the mould cooling

time, place in the jig after moulding, and increase 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

第1页，共10页

REMEDIES解决措施

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

• Use a mold release spray, adjust the mould temperature to

retain the components on the ejection side. use 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

• Increase plastic temperature 增加塑料温度

• Increase mould temperature 增加模温

• Enlarge gates. 加大水口

• Eliminate heavy bosses and ribs.去除较大的突起和筋位

MOULDING TROUBLE SHOOTING GUIDE(注塑缺陷处理指南)

FAULT缺陷 POSSIBLE CAUSES可能原因

• 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 section only.

大件变形

Fracture

cracks脆裂

• Internal stress due to metal

inserts 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

insert（模具冷却导致内应力）.

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• 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）

• Increase the cylinder temperature, increase the nozzle

第1页，共10页

REMEDIES解决措施

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, use a cold mould.

保持模温一致，使用冷模

• Increase / decrease the injection pressure, increase the

mould cooling time, increase 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 set evenly, increase 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 section, 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

• Increase 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

• Use higher molecular weight materials, increase 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, use 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 insert before use, thicken the section in the area

of crack, use 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）

MOULDING TROUBLE SHOOTING GUIDE(注塑缺陷处理指南)

FAULT缺陷 POSSIBLE CAUSES可能原因

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

REMEDIES解决措施

temperature, decrease the screw speed,（增加周期时间、增加喷嘴温度、降低螺杆转速）

• Increase 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, use 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）

• Increase 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 sets（注塑后内部缩孔）

.

• Increase the injection pressure, rate, time, Increase the

size of the gates, runners, and sprue, increase 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）

• Material too hot（原料温度过高）

• Decrease the cylinder temperature, reduce the moulding

cycle time.（减少炮筒温度、缩短注塑周期）

• Insufficient venting in the mould

• Provide vents at the point of final fill, decrease the

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）

injection speed, decrease the mould clamping force, increase

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, use hopper dryer （原料充分干燥）

• Decrease the injection rate（降低注射速率）.

• Eliminate restrictions, increase the gate and runner size.

（加大水口、流道尺寸）

Discoloration（污• Contamination of material（原料杂质）

• 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, use a hopper dryer （原料充分干燥）

• Decrease the overall moulding cycle, use small machine,

check the residence time of the material, reduce the screw

speed, use 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、确保剂、助剂高温下不变性）

• Provide proper ventings, relocate the gates, and decrease

第1页，共10页

点、变）

• Wet material（原料潮湿

• Degradation of material,

colorant, additives （染剂、助剂降解）

• Degradation of material due to gas

entrapment 因空气残留而降解

MOULDING TROUBLE SHOOTING GUIDE(注塑缺陷处理指南)

FAULT缺陷 POSSIBLE CAUSES可能原因

• 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）

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）

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？

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）

• Decrease the nozzle temperature,（降低喷嘴温度）

• Decrease the cylinder temperature, decrease the cylinder

moulding time（降低炮筒温度、降低成型周期）

• Use a nozzle with a small orifice, use the reverse taper

nozzle, use 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, use hopper dryer （充分干燥）

• Reduce the cylinder temperature, decrease the moulding

cycle time, and remove dead spots in the cylinder, screw, and

nozzle assembly. 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 , use 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

• Decrease the injection speed, decrease the injection

pressure, increase the size of gates. 降低注射速度，降低注射压力，增加水口大小

• Use a colorant which can withstand the processing

temperature, 使用耐高温着剂

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• Increase the cylinder temperature, increase the overall

moulding cycle 提高料桶温度，增加整个成型周期

• Increase 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

• Increase the injection pressure, increase the screw

forward time, increase the rate of injection, increase the

size of gates, runners and sprue, use 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第1页，共10页

REMEDIES解决措施

the mould clamping force.（适当的排气、从新设计水口、降低

MOULDING TROUBLE SHOOTING GUIDE(注塑缺陷处理指南)

FAULT缺陷 POSSIBLE CAUSES可能原因

备能力低

• Contamination of material混料

• Poor flow of melt 熔胶流动性差

REMEDIES解决措施

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, decrease 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

• Use a higher MFI material, use 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

• Use 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

• Use a higher injection pressure. Increase the screw forward

time.使用较高的注射压力，加长螺杆前行时间

Jetting

喷射

• Melt injected directly into the

cavity 熔料直接注入模腔

• Melt temperature is not enough 熔温不足

• Direct the material flow to hit the wall and flood the

cavity. 修正料流方向，使其先冲到壁上再充满模腔

• Increase the cylinder temperature, increase the moulding

cycle time. 增加料桶温度，增加成型循环时间

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MOULDING TROUBLE SHOOTING GUIDE(注塑缺陷处理指南)

FAULT缺陷 POSSIBLE CAUSES可能原因

• Adjustment of the injection rate

注射速度调节

• Gate size to small水口太小

Gate smear水口有污点

• Mould temperature not enough 模具温度不足

• Injection rate too fast, gate too

restricted.注射速度太快，胶口受限。

速度

• Increase the gate size and flare the gate 加大水口

• Increase the mould temperature 增加模温

• Decrease the injection rate, increase the gate size, flare

the gate, change the gate location降低注射速度，加大水口，改变水口位置

REMEDIES解决措施

• Increase or decrease the injection rate. 提高或减小注射

第1页，共10页