河北PVC给水管厂

(1)：缺料

(1): lack of material

注塑管件在加工工程时常会模具不能注满的现象。在注塑机刚刚开始工作时，由于模具温度太低，PVC熔融物料的热量损失大，容易产生早期凝固，模腔的阻力大，物料无法充满型腔。这种现象很正常，也是暂时的，连续注射数模后会自动消失。如果模具一直不能注满，则要考虑以下情况并做适当调整：

Injection moulds often fail to fill the mold in the process of processing. When the injection molding machine has just started to work, because of the low temperature of the mold, the heat loss of PVC melt material is large, it is easy to generate early solidification, the resistance of the cavity is large, and the material cannot fill the cavity. This phenomenon is normal and temporary, and the continuous injection of several modes will automatically disappear. If the mold is not full, we should consider the following conditions and make appropriate adjustments.

1：注射物料温度偏低，流动性差，可适当提高加热温度，以提高物料的塑化性和流动性。

1: the temperature of the injection material is low and the fluidity is poor, and the heating temperature can be raised properly to improve the plasticizing and fluidity of the material.

2：设定注塑成型周期偏短，或供料不足，可适当增加注射时间及增加溶胶量。

2: setting the injection molding cycle is short, or the supply is insufficient, the injection time and the amount of sol can be increased properly.

3：设定的压力偏低或从注射压力转换到保压压力的时间过早，可适当提高注射压力或调整保转换时间。

3: the set pressure is too low or it is too early to change from the injection pressure to the pressure protection pressure. It can improve the injection pressure or adjust the time of conversion.

4：注射速度偏低，可适当提高注射速度。

4: the injection speed is low, and the injection speed can be improved properly.

5：流道系统结构尺寸偏小，可适当增加主，分流道的容积或将浇口改大

5: the structure of the runner system is small, which can appropriately increase the volume of the main, divert channel or the gate.

6：模具排气不良，可适当修改浇口位置或者开设排气槽。

6: the mold exhaust is bad, can properly modify the gate position or open the exhaust slot.

7：薄壁处充模困难，可调整制品结构或改变浇注系统。

7: it is difficult to mold the thin wall, and can adjust the structure of the product or change the gating system.

(2)：缩痕严重

(2): severe shrinkage marks

此类问题的产生原因与注料不足产生原因有共同之处，具体为：

The cause of this kind of problem is in common with the reasons for the shortage of material and material.

1：设定的注射压力偏低，可适当提高注射压力。

1: the set injection pressure is low, and the injection pressure can be improved properly.

2：设定的保压时间不够，可适当增加保压时间。

2: the setting time of pressure holding is not enough, and the holding time can be increased properly.

3：设定冷却时间不够，可适当提高冷却时间。

3: the cooling time is not set enough, and the cooling time can be improved properly.

4：溶胶量不足，适当增加溶胶量。

4: the amount of sol is insufficient and the amount of sol is increased properly.

5：模具运水不均匀，可调整冷却回路，使模具各部位冷却均匀。

5: the mould transportation is not uniform, and the cooling circuit can be adjusted to make the mold parts cool even.

6：模具浇注系统结构尺寸偏小，可加大浇口或增大主，分，流道截面尺寸。

6: the mold casting system structure size is small, can increase the gate or increase the main, division, channel section size.