Jinan injection molding manufacturer explained to you the cause analysis of too many burrs of injection molding products. Most burrs occur on the parting surface, that is, between the moving die and the static die, the sliding part of the slider, the gap of the insert, the hole of the ejector, etc. the melt flows into the molten material, and redundant flash is formed on the parts.

這樣的毛刺將在成型過程中起到杠杆作用（yòng），並將進一步增加毛刺，這將導致模（mó）具局部凹陷，並且毛刺將在（zài）注射成型過程中進（jìn）入（rù）增加的惡性循環。因此，如果在開始（shǐ）時發現毛刺，必須盡快修整模具。

Such burr will act as a lever in the molding process and further increase the burr, which will lead to local depression of the die, and the burr will enter an increasing vicious circle in the injection molding process. Therefore, if burrs are found at the beginning, the die must be trimmed as soon as possible.

出現故障的（de）原因有幾個：

There are several reasons for the failure:

1.鎖（suǒ）模（mó）力不（bú）足以進行注塑成型

1. The clamping force is insufficient for injection molding

與成型零件的投影麵積相比（bǐ），如果夾緊力較小，則由於注射壓力的緣故，動模和靜模之間會存在間隙，這不可避免地會產生毛刺。特別是當將側（cè）澆口放置在靠近零件中心的孔上時，由於這種成型（xíng）澆口需要較大的注射壓力，因此非常容易產生毛刺。

Compared with the projected area of molded parts, if the clamping force is small, there will be a gap between the moving die and the static die due to the injection pressure, which will inevitably produce burrs. Especially when the side gate is placed on the hole close to the center of the part, it is very easy to produce burrs because this molding gate requires large injection pressure.

降低注射壓力或增加夾緊力可以這種（zhǒng）缺陷。如果根（gēn）據具體情況切換到流動性好的低壓成型，有時會非常有效。

This defect can be eliminated by reducing the injection pressure or increasing the clamping force. It is sometimes very effective to switch to low-pressure forming with good fluidity according to specific conditions.

2.注塑模具變形引起

2. Caused by deformation of injection mold

如果模具的原始度不足，則會因注射壓（yā）力而偏移。如果（guǒ）中心（xīn）附近有孔，則孔（kǒng）周圍會產生（shēng）毛刺（cì）。當使（shǐ）用中心孔打開側門時，也會產生該孔和（hé）流道的周邊。毛刺。由（yóu）於該原因而產生的毛（máo）刺是由於不良的模具製造造成的，因此難以修（xiū）複。加固模具可以（yǐ）減少毛刺。

If the original degree of the mold is insufficient, it will be offset due to the injection pressure. If there is a hole near the center, burrs will be generated around the hole. When the center hole is used to open the side door, the periphery of the hole and runner will also be generated. skin needling. The burr caused by this reason is caused by poor mold manufacturing, so it is difficult to repair. Strengthening the mold can reduce burrs.

3.塑（sù）料流動性（xìng）太好（hǎo）

3. The fluidity of plastics is too good

僅僅是因（yīn）為塑料的流動性太好，從理論上講並不是（shì）毛刺（cì）的原因。但是，當塑料的流動性太好時，即（jí）使是很小的間隙（xì）也可（kě）能被塑料穿透，因此容易（yì）出現毛刺。為了這種（zhǒng）毛刺，可以降低熔融溫（wēn）度或注射壓力（lì），也可以降低模具溫度或注射速度（dù）。

It's just that the fluidity of plastic is too good. In theory, it's not the cause of burr. However, when the fluidity of the plastic is too good, even a small gap may be penetrated by the plastic, so burrs are easy to appear. In order to eliminate such burrs, the melting temperature or injection pressure can be reduced, and the mold temperature or injection speed can also be reduced.

4在注塑過程中過多地注入熔融材料

4 excessive injection of molten material during injection molding

這不（bú）是故障的直接原因（yīn）。為了（le）防止收縮，注入過多的熔融材料是錯誤的。有必要增加（jiā）成型（xíng）的注射時間或保持時間（請參閱收縮率）。

This is not the direct cause of the failure. In order to prevent shrinkage, it is wrong to inject too much molten material. It is necessary to increase the injection time or holding time of the molding (see shrinkage).

5.注塑模具表麵有異物

5. There are foreign matters on the surface of the injection mold

模（mó）具夾緊麵上有異物，不可（kě）避免地會產生毛刺。為了這個問題，顯然（rán）必須清潔（jié）幹淨（jìng）模具的表麵，以使夾緊表（biǎo）麵閉合。

There are foreign matters on the clamping surface of the die, which will inevitably produce burrs. In order to solve this problem, it is obviously necessary to clean the surface of the die to close the clamping surface.

以上就是濟南注塑加工廠家給大家分享（xiǎng）的文章，希望對大家有所幫助。

The above is the article shared by Jinan injection molding manufacturer. I hope it will be helpful to you.