模具注塑成型過程中可能會遇到這樣和那樣的問題，有可（kě）能遇到的缺陷會是什麽呢？筆者告訴你，模具注（zhù）塑（sù）成型過程中有可能遇到缺陷如下1.注（zhù）塑件缺陷的特征注塑過程不完（wán）全，因為模腔沒有（yǒu）填滿塑料或注塑（sù）過程缺少某些細節。
One problem or another may be encountered in the process of mold injection molding. What are the most likely defects? The author tells you that the defects most likely to be encountered in the process of mold injection molding are as follows: 1 Defects in injection molded parts are characterized by incomplete injection molding process, because the mold cavity is not filled with plastic or the injection molding process lacks some details.
2.可能出現（xiàn）問題的原因，(1).注塑速度不足。(2).塑（sù）料缺料(3).螺杆在行程結束處沒留下螺杆墊料。(4).運行時（shí）間變化。(5).射料缸溫度太低。(6).注塑壓力不（bú）足。(7).射嘴部分被封。(8).射嘴或射料（liào）缸外的（de）加熱器不能運作。(9).注塑時間太短。(10).塑（sù）料貼在料鬥喉壁上。(11).注塑機容（róng）量（liàng）太小（即注射重量或塑化能力）。(12).模溫太低。 (13).沒有清理幹淨模具的（de）防鏽油。(14).止退環（huán）損壞，熔料有倒流現象。
2. Possible causes of problems, (1) Insufficient injection speed. (2). Plastic material shortage (3) There is no screw pad left at the end of the stroke. (4). Running time changes. (5). The temperature of the injection cylinder is too low. (6). Insufficient injection pressure. (7). The nozzle is partially sealed. (8). The heater outside the nozzle or injection cylinder cannot operate. (9). Injection molding time is too short. (10). The plastic is pasted on the throat wall of the hopper. (11). The capacity of the injection molding machine is too small (i.e. injection weight or plasticizing capacity). (12). Mold temperature is too low. (13). There is no antirust oil to clean the mold. (14). The check ring is damaged and the molten material has backflow.
3.方法：(1).增加注塑速度。(2).檢查料鬥內的塑料量。(3).檢查是否正確設定了注射行程，需要（yào）的話進行更改。(4).檢查止逆閥是否磨損或出現（xiàn）裂縫（féng）。(5).檢查運作是否穩定（dìng）。(6).增加熔膠溫度。(7).增加背壓（yā）。(8).增加注（zhù）塑速度。(9).檢查射嘴（zuǐ）孔有沒有異物或未塑化（huà）塑料。(10).檢查所有的加熱器外層用安培表檢驗能量輸出是否正（zhèng）確（què）。(11).增加螺杆向前時（shí）間。(12).增料鬥（dòu）喉區的冷卻量，或降低射料缸後區（qū）溫度（dù）。(13).用（yòng）較大的注塑（sù）機。(14).適當升高模溫。(15).清（qīng）理幹淨模具內的防鏽劑。(16).檢查或更（gèng）換止退環。
3. Solutions: (1) Increase injection speed. (2). Check the amount of plastic in the hopper. (3). Check whether the injection stroke is set correctly and change it if necessary. (4). Check the check valve for wear or cracks. (5). Check whether the operation is stable. (6). Increase the melt temperature. (7). Increased back pressure. (8). Increase injection speed. (9). Check the nozzle hole for foreign matter or unplasticized plastic. (10). Check the outer layer of all heaters and check whether the energy output is correct with an ammeter. (11). Increase the screw forward time. (12). Increase the cooling capacity in the throat area of the hopper or reduce the temperature in the rear area of the injection cylinder. (13). Use a larger injection molding machine. (14). Properly raise the mold temperature. (15). Clean the rust inhibitor in the mold. (16). Check or replace the retaining ring.
注（zhù）塑件（jiàn）尺寸差異：1.注塑件缺陷的特征：注塑過程中重量（liàng）尺寸的變化超過了模具、注塑機（jī）、塑料組合的生產能力。2.可能出現問題的原因：(1).輸入射料缸內的塑料不均。(2).射料缸溫度或波動的範圍太大。(3).注塑機容量太小。(4).注塑壓力不穩定。(5).螺杆複位不穩定。(6).運作時間的變化、溶液黏度不一致。(7).注射速度（流（liú）量控製）不穩定。(8).使（shǐ）用了不適合模具的塑料品種。(9).考慮模溫、注射壓（yā）力、速度、時間和保壓等對產品的影響。
Dimensional difference of injection molded parts: 1 Defect characteristics of injection molded parts: the change of weight and size in the injection molding process exceeds the production capacity of mold, injection molding machine and plastic combination. 2. Possible causes of problems: (1) The plastic in the input injection cylinder is uneven. (2). The temperature or fluctuation range of the injection cylinder is too large. (3). The capacity of the injection molding machine is too small. (4). The injection pressure is unstable. (5). Unstable screw reset. (6). The change of operation time and solution viscosity are inconsistent. (7). The injection speed (flow control) is unstable. (8). Plastic varieties that are not suitable for molds are used. (9). The effects of mold temperature, injection pressure, speed, time and pressure holding on the product are considered.
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