PLASTIC INJECTION MOLDING DESIGN AND MANUFACTURING Part 2 : CALCULATION OF THE CAVITY INJECTION INJECTION MOLD DESIGN HCMC UNIVERSITY OF TECHNOLOGY AND EDUCATION FACULTY OF MECHANICAL
Trang 1PLASTIC INJECTION MOLDING DESIGN
AND MANUFACTURING Part 2 : CALCULATION OF THE CAVITY
INJECTION INJECTION MOLD DESIGN
HCMC UNIVERSITY OF TECHNOLOGY AND
EDUCATION
FACULTY OF MECHANICAL ENGINEERING
WELCOME TO PRESENTATION
Teacher Instruction: TRẦN MINH THẾ UYÊN Students Perform: NGUYỄN HƯỚNG DƯƠNG
Trang 2According to the product batch number
1
Under the spray of machine yield
2
According plasticizer yield of machine
3
According to the mold clamping force
4
According to the size of the machine vise
5
Trang 3Inside: K = 1 / (1-k)
n: Number of minimum cavity mold
L: number of products in a batch of products
K: coefficient caused by defective products (%)
k: failure rates (depending on the company) (%)
tc: injection molding cycle time of a product (s)
tm: time required to complete one batch of
products (dates)
Trang 4 L = 7000 product.
k = 5% K = 1 / (1-5%) = 1.05%
tc = 6s
tm = 30 days.
That the common cavity is designed townhouse
number: 2, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128
because the cavity will easily be arranged in a rectangular
or circular.
Select the 16 lap cavity mold.
Trang 5n: the maximum number on mold cavity
S: injection capacity of the machine (g / 1 sprays)
W: weight of product (g)
Trang 7n: the maximum number on mold cavity
P: plasticizer of machine productivity (g / min)
X: frequency of injection (approximately) per minute (1 / min)
W: weight of product (g)
Trang 9n: the maximum number on mold cavity
Fp: maximum mold clamping force of the machine (N)
S: The average surface area of the molded product direction (mm2)
P: pressure in the mold (Mpa)
Trang 11Based on these parameters we calculated the average cavity selected number for the computer mouse with the luong7000 sp / month at about 8
on a mold cavity and using 3 plates mold
Trang 12Học, học nữa, học mãi!!