1. Pre-Installation Preparation

Confirm the cooling water circuit. The depth to which screws are threaded into the machine platen should be 1.5–1.8 times the screw diameter. Insufficient threading may lead to stripped threads and risk of mold detachment. Verify that all required personnel, materials, tools, documents, equipment, and auxiliary machinery are available for production.

2. Mold Lifting Method

If the mold is not leveled during lifting, varying levels of misalignment may occur between the front and rear mold cavities upon installation. For precision products, this can result in issues such as poor concentricity, step mismatches, inaccurate tooth profiles, and dimensional deviations.

During installation, special attention must be paid to this issue. When the mold is lifted into position and manually pushed to a point of minimal clearance, stop closing the mold. Adjust the lifting rings by loosening and tightening them, using the front mold (which is fixed by the locating ring) as a reference. When the rear mold aligns perfectly level with the front mold and the cavity positions match, resume closing the mold until completion, but avoid applying high pressure initially. (During the first mold clamping, high pressure should not be applied until normal mold closure is confirmed.)

3. Screw Tightening Method

For molds with temperatures below 50°C, screws can be tightened diagonally on both the front and rear molds after high pressure is activated during clamping. Once all eight screws are tightened, the process is complete. For molds above 50°C, screws should not be fully tightened before the mold reaches the target temperature. After the mold temperature stabilizes, activate high pressure and tighten the screws diagonally.

Mold materials expand as temperature increases, leading to volume growth. This effect is more pronounced at higher mold temperatures. Tightening screws before temperature stabilization can negatively impact mold lifespan and precision.

4. Use of Auxiliary Materials

If the mold thickness is insufficient, mounting plates must be added. For molds operating at high temperatures, thermal insulation plates are recommended between the machine platen and the mold. Whether using mounting plates or insulation plates, their flatness must be minimized.

Poor flatness can cause misalignment between the front and rear molds, leading to inconsistencies even under high-pressure clamping and affecting product quality. After the mold reaches the set temperature, verify the actual mold temperature and readjust the mold thickness if necessary.