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Steps Of Die Casting Die(HPDC Mold) Design II
Die casting mold design, We often said as design of die casting dies or die casting die design. Also, Which be called die casting mould design in some countries.
The basic die casting die design steps are summarized as follows:
1. Understand and determine the task
2. Design preparation
3. Select the parting surface and die casting system
4. Choose the die casting equipment
5. Determine the appropriate mold structure and draw the mold assembly sketch *
6. Calculation and verification of relevant parameters *
7. Draw the die casting mold pattern *
8. Proofreading and review *
9. Organize and archive design materials
Next, Introduces steps 4-5 of die casting mold design on this page.
STEPS OF DIE CASTING DIE(HPDC MOLD) DESIGN II
4. Choose the die casting equipment
Dies design is carried out according to the type of die casting equipment, so it is necessary to be familiar with the performance, specifications, and characteristics of various die-casting equipment.
For die casting machines, the following should be understood in terms of specifications: clamping force, pressure chamber capacity, injection pressure, mold opening stroke, mold opening force and ejection force, mold installation dimensions, ejection device and its size, die casting machine Gate displacement distance, gate sleeve positioning ring size, mold maximum, and minimum thickness, installation matching size, etc.
According to the quality of the die casting and the total projected area of the die casting on the parting surface, the required clamping force is calculated, and the overall dimensions of the die are preliminarily estimated. Combined with the actual die casting machine situation of the die casting production unit, the die casting machine is initially selected.
5. Determine the appropriate mold structure and draw the mold assembly sketch *
The main content of this part includes
(1) The form of the gating system and the overflow system, including the sprue, the runner, and the position, shape, and size of the inner gate, as well as the exhaust overflow method, etc.
(2) The structure of the formed part
(3) The demolding method of die castings, the method and sequence of mold opening, the selection and design of the ejection mechanism, etc.
(4) The structure of the main parts and the ruler and the required installation cooperation relationship
(5) Selection of mold base, combination design of supporting and connecting parts
(6) Cooling and heating method and mold temperature adjustment system
When determining the structure of the die-casting mold, the following conditions should be considered
(1) Each structural element in the mold should have sufficient rigidity to withstand the clamping force and the back pressure during liquid metal filling without deformation. All parts in contact with molten metal should be heat-resistant die steel.
(2) Try to prevent the molten metal from impacting or scouring the core from the front to avoid erosion at the inflow of the inner gate. When the above situation is unavoidable, the eroded part should be made into a block type so that it can be replaced frequently. It is also possible to use a larger internal gate section and maintain the thermal balance of the mold to improve the life of the mold.
(3) Reasonably choose the combination of mold inserts to avoid sharp corners and sharp splits to meet the requirements of heat treatment. The push rod and core hole should keep a certain distance from the edge of the insert to avoid weakening the strength of the insert. The fragile parts of the mold should also consider the inlay structure for easy replacement.
(4) After splicing at the forming part, it is easy to leave splicing marks on the die casting. The location of splicing marks should consider the aesthetics and performance of the die casting.
(5) The size of the mold should correspond to the selected die-casting machine.
Drawing a sketch of the mold structure can check the coordination relationship between the considered structures. For inexperienced designers, this sketch is used to solicit the opinions of mold manufacturing and mold operators so as to introduce their rich practical experience into the design.
6. Calculation and verification of relevant parameters *
(1) Calculate the working size of the formed part;
(2) Calculate and verify the thickness of the side wall and bottom plate of the formed part cavity to determine the size of the template;
(3) Calculate core-pulling force, core-pulling distance, mold-opening stroke required for core-pulling, and size of related core-pulling parts such as diagonal pins;
(4) Check of push rod compression instability;
(5) Calculate the temperature adjustment system parameters;
(6) Checking the relevant parameters of the die casting machine