注塑模工艺条件:

Injection molding processing conditions:

干燥处理：通常不需要干燥处理。

Drying: usually does not require drying.

熔化温度：165~185℃

The melting temperature: 165~185 ℃

模具温度：20~50℃

Mold temperature: 20~50 ℃

注射压力：可大到1500bar

Injection pressure: can be up to 1500bar

保压压力：可大到1000bar

Holding pressure: can be up to 1000bar

注射速度：为避免材料降解，一般要用相当地的注射速度。

Injection speed: in order to avoid material degradation, the general use of the injection speed is.

流道和浇口：所有常规的浇口都可以使用。如果加工较小的部件，最好使用针尖型浇口或潜入式浇口；对于较厚的部件，最好使用扇形浇口。针尖型浇口或潜入式浇口的最小直径应为1mm；扇形浇口的厚度不能小于1mm。

The runner and gate: all conventional gate can be used. If the processing of smaller components, it is best to use the tip type gate or sneak into the gate; for the thicker parts, it is best to use the fan gate. Minimum diameter of needle type gate or sneak into the gate should be 1mm; fan gate thickness not less than 1mm.

化学和物理特性

Chemical and physical properties

刚性PVC是使用最广泛的塑料材料之一。PVC材料是一种非结晶性材料。

Rigid PVC is one of the most widely used plastic materials. PVC material is a kind of non crystalline material.

PVC材料在实际使用中经常加入稳定剂、润滑剂、辅助加工剂、色料、抗冲击剂及其它添加剂。

PVC material is often added stabilizer, lubricant, auxiliary processing agent, pigment, impact resistant agent and other additives in practical use.

PVC材料具有不易燃性、高强度、耐气侯变化性以及优良的几何稳定性。

PVC is not flammable, high strength, excellent resistance to climate variability and geometric stability.

PVC对氧化剂、还原剂和强酸都有很强的抵抗力。然而它能够被浓氧化酸如浓硫酸、浓硝酸所腐蚀并且也不适用与芳香烃、氯化烃接触的场合。

PVC had strong resistance to oxidant, reductant and acid. However, it can be concentrated oxidizing acid corrosion such as sulfuric acid, concentrated nitric acid and does not apply and aromatic hydrocarbons, chlorinated hydrocarbons in contact situations.

PVC在加工时熔化温度是一个非常重要的工艺参数，如果此参数不当将导致材料分解的问题。

PVC melting at the processing temperature is a very important process parameters, if this parameter will lead to improper material decomposition problem.

PVC的流动特性相当差，其工艺范围很窄。特别是大分子量的PVC材料更难于加工（这种材料通常要加入润滑剂改善流动特性），因此通常使用的都是小分子量的PVC材料。

The flow characteristics of PVC is rather poor, the process is very narrow. Especially the high molecular weight PVC material is more difficult to process (this material is often added into lubricant improved flow characteristics), we usually use are small molecular weight PVC material.

PVC的收缩率相当低，一般为0.2~0.6%。

PVC contraction rate is very low, typically 0.2~0.6%.

PVC在成型过程中易释放出有毒气体

PVC in the molding process to the release of toxic gases

典型用途

Typical use

供水管道，家用管道，房屋墙板，商用机器壳体，电子产品包装，医疗器械，食品包装等。

Water supply pipeline, domestic pipeline, housing wall panels, business machine housings, electronic products, medical equipment, food packaging.

pvc 就是聚氯乙烯 ，真正的聚氯乙烯是无毒的。有毒的是氯乙烯 ，高分子都存在有聚合度高低的问题，当聚合度足够高，氯乙烯的含量下降到一定值时，就是无毒的PVC了！

PVC is polyvinyl chloride, polyvinyl chloride nontoxic real. Toxic is vinyl chloride polymer, there are degrees of polymerization or problems, when the polymerization degree is high enough, the content of vinyl chloride drops to a certain value, is non-toxic PVC!

PVC是没有毒的，只是添加了热稳定剂，增塑剂等各种有毒的助剂才有毒！有些PVC的缩水是很大的达到2%！

PVC is not toxic, but with the addition of thermal stabilizer, plasticizer and other toxic additives are poisonous! By some PVC is great at 2%!

PVC 料过一段时间会变色;PVC对光 氧 热都不好,很容易发生降解,引起PVC制品颜色的变化,变化顺序为:白色----粉红色----淡黄色----褐色----红棕色-----红黑色----黑色.

PVC material over a period of time will change; PVC are not good for optical oxygen heat, it is prone to degradation caused by a change in color of the product, PVC, change the order: white, pink, yellow, brown, red brown, red and black - Black

PVC：做成成品后，会发出很臭的味。确实我所见过的PVC气味都很差，且带静电易吸尘

PVC: made of finished products, will issue a stinky smell. Indeed I have ever seen PVC smell is very poor, and electrostatic dust

PVC在电线\\电缆\\插头及透明

PVC \ \ \ \ in the wire cable plug and transparent

PVC (聚氯乙烯) -(CH2- CH2)- | CH3

PVC (polyvinyl chloride) - (CH2- CH2) - | CH3

一般以为含15%以下增塑剂的PVC称为硬PVC, 而含15%以上增塑剂的PVC称为软PVC, 玩具所用PVC多为软PVC, 35~90度

The general thought contained 15% plasticizer PVC called PVC, which contain more than 15% plasticizer PVC called soft PVC, toy used for PVC soft PVC, 35~90

@ 塑胶主要性能:

The main performance @ plastic:

a) 非结晶性塑胶, 透明, 著色容易:

A) amorphous plastic, transparent, easy coloring:

b) 材料中增塑剂含量决定软硬程度(一般在55-90度)及力学性能.

B) material of plasticizer content determines the degree of hardness (usually in the 55-90 degrees) and mechanical properties

@ 注塑工艺要点:

@ points of injection molding process:

a) 原料必须乾燥(氯乙烯极性分子易吸水), 乾燥温度85℃左右, 时间2小时以上;

A) raw materials must be dry (vinyl chloride polar molecular absorbent), drying temperature 85 ℃, time of 2 hours or more;

b) 材料的成型温度接近分解温度, 故须控制尽可能用较低的温度注射, 同时亦应尽可能缩短啤塑周期, 以减少熔料在料筒内的滞留时间;

B) molding temperature material close to the decomposition temperature, it must control as much as possible with the temperature lower injection, but also should as far as possible to shorten the molding cycle, in order to reduce the melt residence time in the barrel;

料温参数: 前160-170℃, 中160-165℃, 后140-150℃. 由於PVC本身耐热 性差, 料在料筒内长时间受热, 会降解析出氯化氢(HCL)使胶件变黄甚至产生 黑点, 并且氯化氢对模腔有腐蚀作用, 所以要经常清洗模腔及机头死角位;

The material temperature: 160-170 ℃ parameters before, 160-165 ℃, 140-150 ℃. Since PVC itself after the poor heat resistance, the material in the barrel long time heating, will drop of hydrogen chloride (HCL) plastic pieces of yellow spots and even produce, and hydrogen chloride has a corrosive effect on the cavity, so it should be cleaned regularly the mold cavity and die corner position;

c) 流动性很差, 故注塑模的浇口` 流道尽可能粗` 短` 厚且制件壁厚应在1.5mm以上, 以减少压力损失使料流尽快充满型腔, 总之宜采用高压底温(注射压力200Mpa以上, 背压取0.5-1.5Mpa, 保压取注压力的20-30%);

C) liquidity is poor, so the injection mold runner gate, as far as possible short coarse ` ` thickness and thickness should be more than 1.5mm, to reduce the pressure loss and the material flow as soon as possible filled cavity, anyhow should adopt the high pressure low temperature (above, the injection pressure 200Mpa pressure 0.5-1.5Mpa, pressure and injection pressure of 20-30%);

d) 模具温度尽可能低(通常运冻水, 控制模温在30-45℃), 以缩短成型周期以及减小胶件出模后变形, 必要时借助定型模` 缩水模来较正控制变形;

D) mold temperature as low as possible (usually shipped frozen water, control of the mold temperature at 30-45 ℃), so as to shorten the molding cycle and reduce the deformation of plastic mold, necessary through shaping mold, mold is shrinking deformation control;

e) 水口料: 清洁良好的水口料可百分之百回用;

E): the material outlet of nozzle material clean good one hundred percent reuse;

f) 关机: 早10啤前关电掣, 停机后用PE过机.

Shutdown: F) as early as 10 beer before closing the switch, stop with the PE machine

用於唱片,瓶子,人造皮,地板材料,薄板,胶膜,热索套馆,鞋子,线材,给排水管(UPVC),摥胶.

For the record, bottles, artificial leather, floor materials, sheet, film, thermal cable sleeve Museum, shoes, wire, water supply and drainage tube (UPVC), Tang glue

共混改性塑胶:

Blending modification of plastic:

a) PVC + EVA→提高冲击强度(长效增塑作用);

A) PVC + EVA to improve the impact strength (long-term plasticization);

b) PVC + ABS→增加韧性, 提高冲击强度

B) PVC + ABS to increase the toughness, improve the impact strength