Q:What are the main plastic forming processes?

3. cold pressing molding. Cold pressing molding is also called cold pressing sintering molding. The difference between the cold press molding and the ordinary compression molding is that the material is pressurized and molded at room temperature. The mold after release can be heated or cured by chemical action. This method is used in the forming of polytetrafluoroethylene and some high temperature resistant plastics (such as polyimide, etc.). The general process is three steps of billet sintering cooling.4. transfer molding. Transfer molding is a molding process for thermosetting plastics. When molding, the mold is heated and softened in the heating chamber and then pressed into the mold cavity where it has been heated. According to the different types of transfer molding equipment form: trap type; the tank; the piston.The requirement of plastic molding for transfer molding is that the plastic should have a greater fluidity before reaching the curing temperature, and the curing rate must be faster at the curing temperature. Phenol, melamine, formaldehyde and epoxy resins can meet this requirement.Transfer molding has the following advantages: less waste edge products, can reduce the processing quantity; second molding with fine or brittle insert and perforation of the products, and can keep the insert and the hole position is correct; the product performance is uniform, accurate size, high quality; the mould wear small. The disadvantage is that the manufacturing cost is high compression mold die; the plastic loss; the fiber reinforced plastics for fiber orientation and anisotropy; and around the insert around the plastic, sometimes due to melting is not strong and make the products according to the strength reduction.

Q:Food, equipment, tools, containers, packaging materials, etc. shall comply with food safety standards or requirements

Graphic symbols for packaging and storageGB/T 5009.60. Analytical method for hygienic standard of polyethylene, polystyrene and polypropylene moldings for food packaging

Q:How is the production and characteristics of ceramic wall tiles different from the size and performance of molding?

What is the size of the parison forming pressure and the performance of the ceramic wall and floor tile products?Ceramic wall and floor tiles are usually formed by pressing. Domestic made for 30 tons, imported equipment has tons of suppression, 200 tons and 500 tons. In order to smooth accurate size, excellent products, must pay attention to the effect of powder properties and compression of products. That is to say, the quality of the floor tiles, billets, methods of preparation, and the quality of products and production scale and way of pressing machinery. As for pressing pressure, as the molding pressure decreases, the sintering shrinkage becomes smaller and the water absorption rate becomes smaller, the durability of the product should be improved. It should be noted that the pressure should not be too high. Excessive pressure, stress, and density increase will cause unnecessary energy consumption, and cause compressed air to expand after pressure is canceled and cause excessive spalling.

Q:Donkey hide gelatin cake made of sticky, forming very well, that is, vacuum packaging, after a little sticky in the vacuum bag, what's going on?

For custom vacuum bags, I would recommend a manufacturer who has customized experience in vacuum bags because it reduces your time cost and offers a lot of advice on packaging design and customization.

Q:Packaging machine knife cut out of the mouth is uneven, always inclined, so adjust, now tune not come back, or is unable to cut off, or die!

. This is the importance of after-sales service. Qingdao Xun packaging machine models, can meet the needs of all levels.

Q:What are the packing machines?

Heat shrink packaging machine, mask packaging machine, pillow type packaging machine, food packaging machine, I suggest you can go to see

Q:What is the general packing cost of beer beverage packaging?

In addition, according to the product's own conditions to set, the packaging machine prices are generally in the range of 3-5 yuan

Q:The role of food packaging machinery

(8) can promote the development of packaging machinery related industry is a comprehensive science which is related to many subjects, materials, process and equipment, electronics, electrical appliances, automatic control and other related disciplines, requires the simultaneous and coordinated development, the overall performance of any discipline problems will affect the packaging machinery. Therefore, the development of packaging machinery will effectively promote the progress of related disciplines. In addition, in order to meet the needs of high-speed packaging machinery packaging, the relevant front and rear processes are bound to adapt, and also promote the simultaneous development of related processes.Fig. 3 is a flow chart of liquid filling. With empty bottles of boxes stacked on pallets, by the conveyor belt to depalletizers, will remove the tray one by one, the box with the conveyor belt to the machine, remove the empty bottles from the box, empty by the conveying belt to the washing machine, after cleaning, and transported to the packing machine next to filled with beverage bottles into them. The empty bottles removed from the unloading machine are sent into the bottle washing machine by another conveyor belt for disinfection and cleaning. They are tested by the bottle inspection machine and conform to the cleaning standard and then enter the filling machine and capping machine. The beverage is bottled from a filling machine. Packed beverage bottle capping machine with the sealed and transported to the labeling machine labeling, (see pictures) with various beverage bottle filling line of the process is similar. But because of the different nature of beverage, the filling machine and capping machine are also different.

Q:A & B two sets of packaging machines, at the same time packaging quality of 500 kilograms of goods

(3) large variance, indicating that this group of data volatility, variance is small, volatility is relatively stableAnswer: (1) a = x (501+500+503+506+504+506+500+498+497+495), 10=501,B = x (503+504+502+498+499+501+505+497+502+499), 10=501;(2) S2, =1/n[(501-501) 2+ (500-501) 2+... + (495-501) 2]=12.6,S2 B, =1/n[(503-501) 2+ (504-501) 2+... + (499-501) 2]=6.4;(3) a b > S2 dreams S2,The quality of R B packaging machine 10 bags of sweets is relatively stable.Comments on the subject, mainly on the average number, variance calculation, and their significance, the correct memory formula is the key to solving problems

Q:Vacuum packing machine for cooked food: can whole chicken, whole goose and whole duck be packed?

Well, yesBut the vacuum packaging machines used for different product sizes are different