Operation and composition of Zipper Extruder Machine

   Zipper Extruder Machine can be classified into continuous extrusion and discontinuous extrusion according to the type of action. Plastic extruder is actually one of plastic machinery. The extruder can divide the machine head into a beveled machine head and a right-angle machine head according to the direction of the material flow of the machine head and the center line of the screw.

         The shell of the machine head is generally fixed to the fuselage with bolts. The die in the machine head has a core seat, so the nut can be fixed at the port where the machine head enters. The front of the core seat is equipped with the core. And the center of the core seat is perforated, so it can be used to pass the core wire.

           The operation method of the zipper extruder is also relatively simple. It is possible to make the clip chain of various switches by changing the mold. The zipper extruder is generally made by the main extruder, mold setting, cooling water, constant temperature setting, dewatering device, and air drying. The device is combined with the clamping and closing device, as well as the automatic placement and rewinding. The mold structure is very flexible, and it is very convenient to install and disassemble.

 

 

Seven systems for aluminum injection molds

What is injection molding, that is, the method of manufacturing plastic materials using plastic injection molding machines and molds into plastic products is called injection molding. The plastic raw material is dried and fed into the barrel, and is heated to be molten. Under the push of the screw or the piston, the nozzle and the feeding system are injected into the closed cavity, and after cooling, the mold is hardened and shaped, and the tool used in the molding process is called aluminum injection molds.



The injection mold consists of seven systems: the guiding system, the supporting system, the forming part system, the pouring system, the cooling system, the ejection system, and the exhaust system.
The mold consisting of the above systems, the plastic through the pouring system, through the gate into the cavity, after the filling pressure is cooled by the cooling system, the product is condensed and solidified, and then ejected through the ejection system to complete a molding cycle.

Gating system
After the plastic melt exits the nozzle of the injection machine, it reaches the passage through the mold before the cavity. The molded part system is mainly designed to allow the finished product to be smoothly shot and molded to obtain an ideal product.

Cooling system
The cooling system includes a cooling water channel, a mold temperature controller, and a heating assembly.
1. The role of setting the cooling waterway
* Control mold temperature to improve the quality of plastic parts, mainly in: the effect on surface finish, residual stress, crystallinity, thermal bending.
* Shorten the molding cycle, 80% of the molding cycle is used for cooling, and a well-designed cooling system is necessary to increase productivity.
* Cool large slides to avoid jamming.
2. Cooling method
* Water cooling
* Oil cooling
* Air cooling
* Chilled water cooling

Ejection system
The ejector of the product is the last step in the injection molding process. When the product is cured in the mold, an effective way is needed to eject it from the mold. The quality of the topping will ultimately determine the quality of the product. Therefore, the ejection of the product cannot be ignored. Moreover, in the ejection, the product cannot be deformed, whitened, broken or the like to damage the product. This device is the ejection system. The ejector system has the following categories:
1. Dome needle
2. Flat thimble
3. Sleeve
4. Top block
5. Stripping plate
6. Oblique pin
7. Gas top

Exhaust system
The purpose of the exhaust is to reduce the inconvenience such as air entrainment and scorching caused by the presence of gas in the mold.
Gas source
a. The air present in the feed system and cavity
b. Evaporation of water in plastics
c. Plastic decomposition produces gas
d. Decomposition or chemical reaction of certain additives in plastics

Guidance system
In the mold, the guiding mechanism is mainly used to ensure the exact matching between the male mold and the female mold or other parts in the mold to ensure the shape and dimensional accuracy of the plastic products, and to avoid various parts in the mold. Collision and interference occur.

Support system
The injection molding machine has a large injection pressure. When the span between the two mold legs is large and the strength of the male formwork is insufficient, the male formwork will produce a twist deformation. The use of the support column (SP) is to form a number of fulcrums at the bottom of the male formwork to minimize the deformation of the male formwork.

What aspects of automatic universal spring machine adjustment need attention?

 Automatic universal spring machine adjustment needs to pay attention to the following aspects, otherwise it may cause problems with the machine. The first is the adjustment of the external warp of the spring, which is mainly used to adjust the mechanism of the external warp. You only need to adjust the ejector rod in or out. This adjustment is relatively simple.

         The second is the adjustment of the feeding length and the total number of turns. Generally, the feeding length can be controlled by the number of gears and the number of gears. This depends on the spring expansion length.

          The adjustment of free height, pitch, and number of turns, and the adjustment of spring length, actually include two kinds of inner push and outer pitch. The inner push needs to adjust the inner push straight rod to drive the ejector pin to push the spring away. The outer pitch is generally driven by the cam to drive the pitch knife and ejector spring so that the spring can be opened.

          The adjustment of the tightness between the support rings requires that the coils at both ends should be tight when the compression spring is rolled, and there is a specific requirement for the close length. The adjustment of the cutting mechanism is followed. For the cutting mechanism, a cutter is usually used to work with the core by a vertical cutting method. Therefore, the size of the mandrel can be increased, and the spring coil can be supported at the same time.

What aspects of automatic universal spring machine adjustment need attention?

 Automatic universal spring machine adjustment needs to pay attention to the following aspects, otherwise it may cause problems with the machine. The first is the adjustment of the external warp of the spring, which is mainly used to adjust the mechanism of the external warp. You only need to adjust the ejector rod in or out. This adjustment is relatively simple.

         The second is the adjustment of the feeding length and the total number of turns. Generally, the feeding length can be controlled by the number of gears and the number of gears. This depends on the spring expansion length.

          The adjustment of free height, pitch, and number of turns, and the adjustment of spring length, actually include two kinds of inner push and outer pitch. The inner push needs to adjust the inner push straight rod to drive the ejector pin to push the spring away. The outer pitch is generally driven by the cam to drive the pitch knife and ejector spring so that the spring can be opened.

          The adjustment of the tightness between the support rings requires that the coils at both ends should be tight when the compression spring is rolled, and there is a specific requirement for the close length. The adjustment of the cutting mechanism is followed. For the cutting mechanism, a cutter is usually used to work with the core by a vertical cutting method. Therefore, the size of the mandrel can be increased, and the spring coil can be supported at the same time.

Application of water based pu glue on automobile dashboard

         Automotive interior decoration water-based applications have become the mainstream of environmental protection, and now many product parts, such as car seats, car door guards, and car dashboards, have been applied with relevant environmentally-friendly water-based PU adhesives.

        The instrument panel is an assembly of various indicator instruments and ignition switches installed in the cab. Generally, it is installed on the instrument panel or as an accessory on the steering column. This technical function is artistic The functions of vacuum blister molding instrument panel are technologies that are often used by domestic and foreign passenger cars. The instrument panel using water-based PU adhesive not only has the advantages of good instrument panel cushioning, high safety, strong aesthetics, etc.

          In the case of water-based PU adhesives that are processed on the instrument panel, if the operating process conditions are not properly controlled, problems such as cracked skin, uneven thickness, unsatisfactory filling, and air bubbles will occur.

Water based pu glue can be used in the interior decoration materials of vehicles. It has a high content, fast drying speed, good high temperature resistance, strong adaptability and excellent adhesion.

          Pure water-based PU adhesive does not contain solvents such as toluene, xylene, ethyl acetate, etc., so it is not harmful to the general construction site environment, so it is generally beneficial to protect the health of the operator, and there is no toxic solvent residue in the finished product Water-based PU glue is relatively easy to clean, and overflow glue is easy to remove.