The structure and operation of printing equipment determine the quality of packaging plastic bags. These four factors are: ink scraper, rubber roller, ink supply system and drying oven. Next, let's talk about how to ensure the quality of plastic bags.

1.好的產(chǎn)品可以刮后印刷

1. Good products can be printed after scraping

如果你想刮掉不必要的墨水而不臟掛、墨水流(彩色流)和刀線，你必須適當(dāng)調(diào)整刮刀的硬度、高度和角度。

If you want to scrape off unnecessary ink without dirty hanging, ink flow (color flow) and knife line, you must properly adjust the hardness, height and angle of the scraper.

2.銘記膠輥

2. Rubber roller

壓花膠輥的硬度和壓力直接影響塑料袋的上墨量。

The hardness and pressure of embossing cots directly affect the ink amount of plastic bags.

壓花膠輥的硬度影響著著墨量，而膠輥的硬著墨量較小，膠輥的軟著墨量較大。膠輥的壓力太大，墨水量太大。膠輥的壓力更小，墨水更少。

The hardness of embossed cots affects the inking amount, while the hard inking amount of COTS is small and the soft inking amount of COTS is large. The pressure of the cot is too high and the ink volume is too large. Cots have less pressure and less ink.

印版圖案很深，膠輥的材料一定很硬；印刷版有一個(gè)輕的圖案，所以印刷的膠輥必須由較軟的材料制成。如果包裝膠袋印刷速度快，膠輥的材料必須硬，如果包裝印刷速度慢，必須采用軟材料印刷膠輥。

The printing plate pattern is very deep, and the material of the cot must be very hard; The printing plate has a light pattern, so the rubber roller for printing must be made of softer material. If the packaging plastic bag printing speed is fast, the material of the rubber roller must be hard. If the packaging printing speed is slow, the rubber roller must be printed with soft material.

3.印刷設(shè)備的供墨系統(tǒng)

3. Ink supply system of printing equipment

循環(huán)必須是好的，并且總是確保墨水是不斷流動(dòng)的。應(yīng)始終確保油墨粘度的一致性，并應(yīng)定期進(jìn)行測(cè)量和添加溶劑。新舊油墨應(yīng)按比例混合使用。

The circulation must be good and always ensure that the ink is flowing. The consistency of ink viscosity shall always be ensured, and the measurement and solvent addition shall be carried out regularly. New and old inks should be mixed in proportion.

使用復(fù)合溶劑。避免油墨成分的不平衡、溶解和抗粗糙。用墨斗和攪拌棒進(jìn)行油墨循環(huán)，注意墨斗不要太大，墨斗的大小要適中。

Use compound solvents. Avoid ink composition imbalance, dissolution and anti roughness. Use the ink bucket and mixing rod for ink circulation. Pay attention to that the ink bucket should not be too large and the size of the ink bucket should be moderate.

4.干燥箱

4. Drying oven

提高包裝膠袋印刷速度重要的一點(diǎn)是烤箱的效果。

An important point to improve the printing speed of packaging plastic bags is the effect of the oven.

墨水是用熱空氣干燥的，而不是加熱。溫度越高，塑料袋上的墨水越難干燥。

Ink is dried with hot air, not heated. The higher the temperature, the harder it is to dry the ink on the plastic bag.

一，溫度過高，會(huì)使油墨表面結(jié)膜。導(dǎo)致固體干燥的假干燥氣氛隨后是油墨中低熔點(diǎn)溶劑過早蒸發(fā)、高沸點(diǎn)殘留溶劑以及干燥速度慢。

1、 If the temperature is too high, it will make the ink surface conjunctive. The pseudo drying atmosphere leading to solid drying is followed by premature evaporation of low melting point solvents, high boiling point residual solvents and slow drying speed.

規(guī)定干燥箱的溫度應(yīng)為40-50?？諝獠荒苤苯哟档剿芰媳∧ど希瑹崃恳膊荒苤苯涌镜奖∧け砻?。它應(yīng)該具有良好的排氣性能，并且不能將空氣輸送到印版和墨盒。干燥箱具有的二次回風(fēng)特性。

It is specified that the temperature of the drying oven shall be 40-50. The air cannot be blown directly onto the plastic film, and the heat cannot be baked directly onto the film surface. It should have good exhaust performance and cannot deliver air to printing plates and cartridges. The drying oven has the characteristics of secondary return air.