What to pay attention to before using plastic trial molds

Precautions before using plastic test molds:

1. Understand the relevant information about the mold: It is recommended to obtain the design drawings of the mold and invite the mold technician to participate in the trial mold work.

2. First, check the mechanical coordination on the workbench: pay attention to whether there are scratches, missing parts, or looseness, whether the mold moves towards the sliding plate accurately, whether there are leaks in the water and gas pipe joints, and if there are any restrictions on the opening of the mold, they should also be marked on the mold. If the above actions can be done before hanging the mold, it can avoid the waste of time caused by discovering problems during hanging and dismantling the mold.

3. After determining that the actions of each part of the mold are appropriate, it is necessary to choose a suitable trial mold injection machine. When selecting, attention should be paid to:

(1) Injection capacity;

(2) The width of the guide rod;

(3) Larger opening range;

(4) Whether the accessories are complete, etc.

After everything is confirmed to be fine, the next step is to hang the mold. When hanging, attention should be paid to locking all clamping templates and not removing the fishing hook before opening the mold to avoid loosening or breaking the clamping templates and causing the mold to fall off. After the mold is installed, the mechanical movements of each part of the mold, such as the sliding plate, ejector pin, tooth retraction structure, and limit switch, should be carefully checked for accuracy. And pay attention to whether the feeding nozzle is aligned with the feeding port. The next step is to pay attention to the mold closing action. At this time, the closing pressure should be lowered. During manual and low-speed mold closing actions, pay attention to whether there are any unsmooth movements or abnormal sounds.

4. Raise mold temperature: Select an appropriate mold temperature control machine based on the properties of the raw materials used in the finished product and the size of the mold, and raise the temperature of the mold to the required temperature for production. After the mold temperature increases, it is necessary to re-examine the movements of each part, as the steel may cause mold jamming due to thermal expansion. Therefore, attention should be paid to the sliding of each part to avoid pulling and vibration.

5. If the experimental plan rule is not implemented in the factory, we suggest that when adjusting the trial mold conditions, only one condition can be adjusted at a time to distinguish the impact of a single condition change on the finished product.

6. According to the different raw materials used, bake them moderately.