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皮帶輪:注塑機螺桿轉速不穩定原因及轉速的確定

發布時間:2020-11-01 15:10:27 點擊數:

第一:注塑機螺桿的工作轉速不穩定,受下列幾個因素影響:

First: The working speed of the screw of the injection molding machine is unstable, which is affected by the following factors:

1、傳動V形帶磨損嚴重,工作時打滑。

1、The driving V-belt is severely worn and slips during work.

2、V形帶傳動皮帶輪的中心距過小,使帶傳動不能與皮帶輪梯形斜面正確摩擦傳動工作。

2、The center distance of the V-belt drive pulley is too small, so that the belt drive cannot correctly friction drive with the trapezoidal slope of the pulley.

3、機筒內加熱料溫度偏低,原料塑化不均勻,造成注塑機螺桿轉動工作負載扭矩增大,使注塑機螺桿轉速不穩。

3、The temperature of the heating material in the barrel is low, and the plasticization of the raw materials is not uniform, which causes the increase of the working load torque of the screw of the injection molding machine, and the screw speed of the injection molding machine is unstable.

4、注塑機螺桿用推力軸承損壞等。

4、The thrust bearing of the screw of the injection molding machine is damaged.

 

第二:注塑機螺桿的工作轉速不穩定對塑料制品質量的影響:

Second: The influence of the unstable working speed of the screw of the injection molding machine on the quality of plastic products:

1、 制品的幾何形狀尺寸誤差大;

1、The geometric shape and size error of the product is large;

2、 制品會經常出現橫向皺紋;

2、The product will often show horiz

3、 制品表面粗糙、易脆裂或局部有硬塊出現。

3、The surface of the product is rough, brittle, or partially hard.

 

第三:注塑螺桿的轉速應根據注塑條件進行選擇。

Third: The rotation speed of the injection screw should be selected according to the injection conditions.

1、用注塑機的額定螺桿轉速。注塑PS時,以額定塑化量的50%--60%來標定所要加工物料的塑化能力和螺桿轉速。

1、Use the rated screw speed of the injection molding machine. When PS is injected, the plasticizing capacity and screw speed of the material to be processed are calibrated with 50%-60% of the rated plasticizing amount.

2、根據聚合物所能允許的最大線速度來確定螺桿轉速。

2、Determine the screw speed according to the maximum linear speed allowed by the polymer.

螺桿最高轉速 n=V/πD式中 V----聚合物允許的最大線速度。一般聚合物V=80cmm/S,熱敏性聚合物V=1.8cm/s D----螺桿直徑(cm)

Maximum screw speed n=V/πD where V----maximum linear speed allowed by polymer. General polymer V=80cmm/S, heat sensitive polymer V=1.8cm/s D----screw diameter (cm)

3、根據聚合物所允許的切變速率r來確定,可將上式中的V換成r后再確定。

3、Determine according to the allowable shear rate r of the polymer, which can be determined after replacing V in the above formula with r.

在進行螺桿轉速調整時,要從較低轉速開始,向較高轉速逐漸調試,再行確定螺桿轉速。

When adjusting the screw speed, start from a lower speed, adjust to a higher speed gradually, and then determine the screw speed.

 

以上內容由臺州市椒江精藝機械廠整理提供,專業生產制造、銷售各種皮帶輪、手輪、滑輪、聯軸器.等傳動機械配件的綜合型企業??傉嫉孛娣e10000余平方米,已有30年的生產歷史,生產規模大,技術員工經驗豐富。設計人員可根據客戶所提供的圖紙或常規型號的相關數據設計加工生產40mm至1500mm各種型號規格的產品及各種鑄件等。我廠所用的生產原料都是標準合格的合金,產品工藝精良,使用壽命長,運動精密度高,拆裝便捷,能有效提高整機質量,很多國內外廠家,商家,已大批量向我廠訂購。

The above content is organized and provided by Taizhou Jiaojiang Jingyi Machinery Factory. It is a comprehensive enterprise specializing in the production and sale of various belt pulleys, hand wheels, pulleys, couplings and other transmission machinery accessories. It covers an area of more than 10,000 square meters, has 30 years of production history, large-scale production, and rich experience in technical staff. Designers can design, process and produce various types and specifications of products and castings from 40mm to 1500mm according to the drawings provided by customers or related data of conventional models. The raw materials used in our factory are all standard qualified alloys. The products have excellent craftsmanship, long service life, high movement precision, convenient disassembly and assembly, and can effectively improve the quality of the whole machine. Many domestic and foreign manufacturers and merchants have sent large quantities to our factory. order.

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