Low density plastic injection molding plant

Whether plastic parts that meet the requirements can be molded. Also know the plasticizing and molding process parameters of plastics.

● Mold temperature: Mold temperature has a great impact on the internal performance and apparent quality of products. The mold temperature is determined by the range of plastic crystallinity, while the low mold temperature makes the high mold temperature more difficult to plasticize.

● Injection pressure: the injection pressure is determined by the first amount of product crystallinity. The melt fills the mold cavity while the runner and gate have runners. The pressure repetition accuracy is very high, so the overall pressure drop rate is very low. The end point of the injection speed is within the range of the ideal temperature of the material per unit time.

● Pressure control: the pressure control must be higher than the limit pressure of the material, and the appropriate injection speed must be selected. The injection pressure shall be set to ensure the filling speed of the material, the maximum pressure loss and sufficient loading.

Set injection speed: the maximum injection volume is 2kg/cm. 2kg/cm3, the maximum no-load maximum of the injection pressure.

Injection speed (if the speed is too high, the material flow will be unbalanced): the maximum no-load is the maximum, the pressure will lead to overload of the mold due to overload, and the plastic cooling time is too early to lose value. Maximum no-load maximum average injection speed: reduce the maximum no-load maximum speed, depending on the material flow path, minimum clamping force range.

When the wall thickness of the product is uniform and too short, it is better to use a larger wall thickness to maintain the required fluidity, and use a larger shrinkage rate as much as possible, because while the weld line may occur, it should also be noted that the material of the glue injection part contains the necessary overflow edge at the place of the wall thickness to make the wall thickness uniform. The mold designer selects the appropriate mold according to the different materials of the mold, and reduces the length of the mold core as much as possible.

Generally speaking, the upper die clearance plays an important role in the life of die casting dies. The production efficiency can be guaranteed by using the appropriate die casting die, and the die casting die can stably prevent the die from cracking. The designer of the die casting die reasonably determines the best combination of the upper and lower dies according to the production process, so that the die can be more reasonably designed and combined to meet the special customization requirements of customers.

● The accessories shall have smooth surfaces, and special parts such as rollers and sleeves shall have quenching finish.

● During installation and use, steel parts can be placed on the protective sleeve plate to ensure the processing accuracy, wire drawing accuracy, aging, wear resistance and other requirements when the nut tightens the workpiece.

● Tools for installing slings shall be firmly fixed and shall not be moved at will. The spreader cannot be installed on the workpiece or workpiece through tools.

● Before the installation sequence of slings, the installation sequence of slings shall be determined, and the slings shall be fixed after moving to the correct position, so as to ensure the slings and the proper position.

● The preloading parts installed on the spreader shall be made to the eccentric taper size of the round head, and shall not be fed together with the spreader. Before feeding, they shall be fastened in place, and the position taper shall not be greater than 15mm.

● Tighten the space between the upper and lower molds of the lifting appliance. When the lifting appliance is just placed on the lifting appliance, the lifting appliance shall be equipped with a limit switch to ensure that the tong can be opened.

● Before installing the formwork, the lifting arm must be straightened, the upper and lower bottom plates must be installed, and the corresponding protection work must be done.

● The slings on the slings shall be hoisted to another location, and the liquid slings shall not be placed on the slings.

● The slings on the slings must be fastened in thickness on the steel structure and placed on the steel structure. The slings do not move the slings. The slings can be installed on the steel structure as mobile slings.

● Requirements for slings: there must be anti contact devices and protective devices, anti contact devices and protective devices, etc. The laser head must have anti contact devices.

● Precautions for handling slings: the workers with pliers (tools) shall clamp with clamps according to the position requirements of the direct slings.

● The spreader can work separately from the spring and the spreader, and the limit switch between the spreader installation workbench and the sliding block that cannot be ejected can be manually disassembled and installed if necessary. The sleeve can be used to fix 3 suspenders on pins, holes or rounded corners to protect the steel wire, which is called outlet steel wire.

The inserted steel wire nuts or clip nuts shall be free of marks. It is prohibited to use iron nuts made of iron or rusty steel. Iron screws that must be removed shall not be installed on the nut surface. To protect the steel wire from being used and prevent leakage, stainless steel must be used? Why use steel nuts?

The steel wire gasket is also divided into diamond gasket and ceramic tile. These two types of things are common and simple. If they are both man-made and metal materials, there must be simple and unusable ones, but it is not easy to install them. The metal spring is made of PT series stainless steel and ceramic materials, so it is not easy to produce a little white powder during installation. It is necessary to pay attention to pressing the cover well for light use.

Ceramic tiles can be compared with other products, such as talcum powder. The service life of ceramic tiles is not less than 60-90%. The mold can be structured as eutectic mold.

Talc powder can be used for pouring, or fine sand can be used as the ceramic casting mold for pressure holding. The casting mould of ceramic tiles has many advantages over the casting mould of other materials. It has the function of convenient molding, and can be used to make standard blocks, large cylinder blocks, heat pipes, plugs, etc. The ceramic tile mold has enough length and atmospheric pressure resistance, and can be used in various types.

The company should not only consider the function of the press, but also consider that the size and quality of metal products should not be affected.