阅读说明：本技术 一种全自动吹塑工艺 (Full-automatic blow molding process ) 是由 俞业洋 于 2019-11-26 设计创作，主要内容包括：本发明公开了一种全自动吹塑工艺,包括以下步骤：A、首先对塑料模具腔进行清洗、吹干；B、配置塑料模具各材料的组份,并将材料混合后加搅拌机中匀速搅拌,得到塑料模具原料；C、将塑料模具原料加入挤出机中熔融并挤出塑料型坯；D、对塑料模具腔进行预热,并将塑料型坯加入塑料模具腔内后合模,并在塑料模具腔内通入压缩空气吹胀塑料型坯,得到模具半成品；E、将模具半成品多余部分切割,并进行抛光打磨,即得到模具成品,本发明采用的吹塑工艺操作简单,得到的模具机械性能好,不易开裂,使用寿命长。(The invention discloses a full-automatic blow molding process, which comprises the following steps: A. firstly, cleaning and drying a plastic mould cavity; B. preparing the components of each material of the plastic mould, mixing the materials, and adding the mixture into a stirrer to stir at a constant speed to obtain a plastic mould raw material; C. adding the raw material of the plastic mould into an extruder to be melted and extruding a plastic parison; D. preheating a plastic mould cavity, adding a plastic parison into the plastic mould cavity, closing the mould, and introducing compressed air into the plastic mould cavity to blow up the plastic parison to obtain a semi-finished mould product; E. the method has the advantages that the method is simple in operation of the blow molding process, the obtained mold is good in mechanical property, not prone to cracking and long in service life.)

1. A full-automatic blow molding process is characterized in that: the method comprises the following steps:

A. firstly, cleaning and drying a plastic mould cavity;

B. preparing the components of each material of the plastic mould, mixing the materials, and adding the mixture into a stirrer to stir at a constant speed to obtain a plastic mould raw material;

C. adding the raw material of the plastic mould into an extruder to be melted and extruding a plastic parison;

D. preheating a plastic mould cavity, adding a plastic parison into the plastic mould cavity, closing the mould, introducing compressed air into the plastic mould cavity to blow the plastic parison to obtain a semi-finished mould, and then demoulding;

E. and cutting the redundant part of the semi-finished product of the die, and polishing to obtain a finished product of the die.

2. The fully automatic blow molding process according to claim 1, wherein: the plastic mould in the step B comprises, by weight, 20-30 parts of glass fiber reinforced polypropylene, 14-28 parts of polytetrafluoroethylene, 10-20 parts of liquid paraffin, 4-12 parts of molybdenum oxide, 5-10 parts of cobalt boroacylate, 3-9 parts of sodium pyrophosphate, 2-6 parts of aluminum magnesium alloy, 4-10 parts of dolomite powder and 2-4 parts of a flame retardant.

3. The fully automatic blow molding process according to claim 1, wherein: the stirring speed in the step B is 2000-3000 r/min, and the stirring time is 30-40 min.

4. The fully automatic blow molding process according to claim 1, wherein: the extrusion temperature of the extruder in the step C is 800-900 ℃.

5. The fully automatic blow molding process according to claim 1, wherein: and D, introducing compressed air at a flow rate of 5-10L/min for 10min, maintaining the pressure for 20-30min, and then introducing compressed air again at a flow rate of 3-6L/min for 5-9 min.

6. The fully automatic blow molding process according to claim 5, wherein: the pressure maintaining pressure is 50-60 MPA.

Technical Field

The invention relates to the technical field of blow molding processes, in particular to a full-automatic blow molding process.

Background

Blow molding, also known as blow molding, is a rapidly developing plastic processing method. The blow molding process began during world war ii for the production of low density polyethylene vials. In the late 50 s, the blow molding technology has been widely used with the advent of high density polyethylene and the development of blow molding machines. The volume of the hollow container can reach thousands of liters, and computer control is adopted in some production. Suitable plastics for blow molding are polyethylene, polyvinyl chloride, polypropylene, polyester, etc., and the resulting hollow containers are widely used as industrial packaging containers. Blow molding can be classified into extrusion blow molding and injection blow molding according to the parison making method, and newly developed are multilayer blow molding and stretch blow molding.

The current process of blow molding of molds is complex and the resulting products have poor mechanical properties, and therefore, improvements are necessary.

Disclosure of Invention

The invention aims to provide a full-automatic blow molding process to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a fully automatic blow molding process comprising the steps of:

A. firstly, cleaning and drying a plastic mould cavity;

B. preparing the components of each material of the plastic mould, mixing the materials, and adding the mixture into a stirrer to stir at a constant speed to obtain a plastic mould raw material;

C. adding the raw material of the plastic mould into an extruder to be melted and extruding a plastic parison;

D. preheating a plastic mould cavity, adding a plastic parison into the plastic mould cavity, closing the mould, introducing compressed air into the plastic mould cavity to blow the plastic parison to obtain a semi-finished mould, and then demoulding;

E. and cutting the redundant part of the semi-finished product of the die, and polishing to obtain a finished product of the die.

Preferably, the plastic mold raw material components in the step B comprise, by weight, 20-30 parts of glass fiber reinforced polypropylene, 14-28 parts of polytetrafluoroethylene, 10-20 parts of liquid paraffin, 4-12 parts of molybdenum oxide, 5-10 parts of cobalt boroacylate, 3-9 parts of sodium pyrophosphate, 2-6 parts of aluminum magnesium alloy, 4-10 parts of dolomite powder and 2-4 parts of a flame retardant.

Preferably, the stirring speed in the step B is 2000-3000 r/min, and the stirring time is 30-40 min.

Preferably, the extruder extrusion temperature in the step C is 800-.

Preferably, in the step D, the flow rate of the compressed air is 5-10L/min, the pressure is maintained for 20-30min after the compressed air is introduced for 10min, and then the compressed air is introduced again, the flow rate is 3-6L/min, and the introduction time is 5-9 min.

Preferably, the dwell pressure is 50 to 60 MPA.

Compared with the prior art, the invention has the beneficial effects that: the blow molding process adopted by the invention is simple to operate, and the obtained mold has good mechanical property, is not easy to crack and has long service life; the plastic mould adopted by the invention has wide raw material sources, stronger corrosion resistance and flame retardant property, high strength and good luster, and the prepared plastic module has high quality; in addition, according to the invention, the compressed air with different flow rates passes through the plastic mould twice, so that the blowing effect of the compressed air can be improved, the blowing quality of the plastic mould is further improved, and the toughness of the plastic mould is enhanced.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.