1. Try to keep the plastic parts shrink evenly and keep the heat balance of the mold.

2、如果冷卻水孔的數(shù)量大約大，孔徑大約大，則對塑料零件的冷卻成果大約均勻。根據(jù)經(jīng)驗(yàn)，冷卻水孔線與空腔壁的距離應(yīng)為冷卻水孔直徑的1~2倍（正常12~15mm），冷卻水孔距約為水孔直徑的3~5倍，水孔直徑約為8~12mm。

2. If the number of cooling water holes is about large and the hole diameter is about large, the cooling effect of plastic parts is about uniform. According to experience, the distance between the center line of the cooling water hole and the cavity wall should be 1 ~ 2 times of the diameter of the cooling water hole (normal 12 ~ 15mm), the center distance of the cooling water hole is about 3 ~ 5 times of the diameter of the water hole, and the diameter of the water hole is about 8 ~ 12mm.

3、冷卻水孔與空腔表面之間的距離應(yīng)盡可能相等。當(dāng)塑料件的壁厚均勻時(shí)，冷卻水孔與型腔表面之間的距離應(yīng)處處相等。當(dāng)塑料件的壁厚不均勻時(shí)，應(yīng)在壁厚處加強(qiáng)冷卻，水孔應(yīng)靠近型腔，但距離不應(yīng)小于10mm。

3. The distance between the cooling water hole and the cavity surface shall be as equal as possible. When the wall thickness of the plastic part is uniform, the distance between the cooling water hole and the cavity surface should be equal everywhere. When the wall thickness of plastic parts is uneven, the cooling shall be strengthened at the wall thickness, and the water hole shall be close to the cavity, but the distance shall not be less than 10mm.

4、加強(qiáng)澆口冷卻。通常來說，在注射成型過程中，澆口附近的溫度較高，距離澆口越遠(yuǎn)，溫度越低。因此，有需要加強(qiáng)澆口處的冷卻，也就是說，冷卻水從閘門附近流入。

4. Strengthen gate cooling. Generally speaking, in the process of injection molding, the temperature near the gate is higher, and the farther away from the gate, the lower the temperature. Therefore, it is necessary to strengthen the cooling at the gate, that is, the cooling water flows in from near the gate.

5、入口和出口之間的溫差應(yīng)減小。如果進(jìn)出水溫差過大，一次性餐具模具的溫度分布就會(huì)不均勻。材料溫度越低，流動(dòng)性越低。對于矩形模具，通常沿模具寬度開水孔，使進(jìn)出水溫差不大于5℃。

5. The temperature difference between inlet and outlet should be reduced. If the difference of inlet and outlet water temperature is too large, the temperature distribution of disposable tableware mold will be uneven. The lower the material temperature, the lower the fluidity. For rectangular molds, water holes are usually opened along the width of the mold to make the inlet and outlet water temperature difference no more than 5 ℃.

6、合理選擇冷卻水道的形式。對于收縮較大的塑料件（聚乙烯），應(yīng)沿收縮方向設(shè)置冷卻水孔。

6. Reasonably select the form of cooling water channel. For plastic parts (polyethylene) with large shrinkage, cooling water holes shall be set along the shrinkage direction.

7、合理確定冷卻水管接頭位置。為了不影響操作，進(jìn)出水管接頭通常設(shè)置在注塑機(jī)背面模具的同一側(cè)。

7. Reasonably determine the position of cooling water pipe joint. In order not to affect the operation, the inlet and outlet pipe joints are usually set on the same side of the mold on the back of the injection molding machine.

8、冷卻系統(tǒng)的水道應(yīng)盡量避免與一次性餐具模具上的其他機(jī)構(gòu)（如推桿孔、小芯孔等）發(fā)生干涉，設(shè)應(yīng)充分考慮這些因素。

8. The water channel of the cooling system should try to avoid interference with other mechanisms on the disposable tableware mold (such as push rod hole, small core hole, etc.), and these factors should be fully considered in the design.

9、冷卻水管進(jìn)出口接頭應(yīng)預(yù)埋在模板內(nèi)，以避免搬運(yùn)時(shí)損壞模板。較好分別標(biāo)記入口和出口，如“入”和“出”。

9. The inlet and outlet joints of cooling water pipes shall be embedded in the formwork to avoid damage to the formwork during handling. It is better to mark the entrance and exit respectively, such as "in" and "out".