Mold in the commonly used fastening screws are divided into six angle cylinder head screws (six screws), the six angle flat end screws (no head screws) and six angle screw bolt.
In the die, the fastening screws should be ed according to different needs of different types of priority specifications, while ensuring that the fastening force is uniform, enough. The following will be various types of fastening screws in the use of the situation to be explained.
A. six angle cylinder head screws (six angle screws)
Internal six angle screw priority specifications: M4, M6, M10, M12
The inner six angle screw is mainly used for the front and back mould die, core, small and other structural components. In addition to the aforementioned screw positioning ring, the jack Tsui, such as , ah, skirt plate etc. the screw to apply, and to meet the priority specification for screw die material before and after fastening, should be ed in accordance with the following requirements:
Specification: Die material width is less than or equal to 300mm using M10 >300mm with M12 width of die material
Quantity: length is less than or equal to 300mm using the material model 4 screws; the length of >300mm and 500mm using 6 screw die; the length of >500mm and 800mm using 8 screw die.
Center distance: according to the following two ways to choose see figure 5.5.6
When choosing W1=10.5mm 14.5mm - M10
OR 20n n L1=15n representation
When choosing W1=12.5mm 13.5mm - M12
OR 30n n L1=25n representation
B. six angle flat end screw (no head screw)
The non head screw is mainly used for the fastening of a needle, a drawing rod and a needle. In figure 5.5.7, standard parts, and o d o D o d is actually related with size, so it is usually used as the basis for ion to the D, and ed according to the following range.
When the A. D is less than or equal to 3.0mm or 9/64, use M8
When the B. D is less than or equal to 3.5mm or 5/32, use M10
When the C. D is less than or equal to 7.0mm or 3/16, use M12
When the D. D is less than or equal to 8.0mm or 5/16, use M16
When the D E. 8.0mm or 5/16 ", fixed by the pressing plate (concrete structure see Chapter eighth section 8.2)
C. six angle head bolt
Six angle head screw bolt is only used as a substitute for the garbage, the use of a single variety, the general use of M12X20, M10X20 two forms.
Use quantity according to the following requirements.
When the mold ejector plate length is less than or equal to 350, the number of 4; when the billet thimble plate length is not less than 400, the number of 6; when the mold ejector plate length is not less than 600, the number of 8.