PRODUCT OVERVIEW SLIDE CORE UNITS FOR TWO–COLOR INJECTION MOLD–WING CAM TYPE–
SLIDE CORE UNITS FOR TWO–COLOR MOLDING (SLIDE AMOUNT 6mm)
■ Overview With the improvement of mold technology, two–color molded products (two–color or two types of resin molded products) have become widely used. They are often used for key tops of computers and illuminated push buttons for car audio equipment. Normally, two–color molding requires a two–color molding machine and a special mold with a reversing mechanism. In addition, if the molded product has an undercut, the structure of the slide core is complicated and advanced design is required. However, MISUMI's SCWM slide core unit for two–color molding makes it easy to design and manufacture molds for two–color molding. ■ Example of operation of slide core SCWM ( ① + ② ) for two–color molding
SCWM ①+② Set
38
38
① SCWMA (Primary side)
② SCWMB (Secondary side)
③
Primary side cam
Backing plate
Primary side cam structure
Slide amount ST = 6
Heat-resistant leaf spring
②
④
Wing cam
Primary mold
(Left/Right)
⑤
• Bring the slide core forward when the mold is closed (Fig. II) • After primary molding, the mold can be opened with the slide core fixed to the molded product. (Fig. III)
① SCWMA (Primary side)
⑥
Hexagon socket head cap screw
① b
① a
Slide core
Secondary side cam
Primary side cam
Core (internal)
⑦
⑦
⑧
⑧
⑥
Guide rail Ball plunger SCWMA and SCWMB ⑥⑦⑧ have the same shape
Guide rail
Slide core
② SCWMB (Secondary side)
Ball plunger
(I) Mold open
(II) Mold closed
(III) Mold open
① SCWMA (Primary side)
＋ 0.3 ＋ 0.1
R4
R4 ＋ 0.3 ＋ 0.1
Secondary side cam
Wing cam
Secondary cam structure
28
5
28
5
⑥
① a
31.9
① b
Primary side cam
Secondary side cam
Slide core
Two–color molding is facilitated by using the opening and closing of the wing cam. •Mold can be closed by avoiding collision between the secondary cam and slide core (Fig. V) •Return the slide core when opening the die plate after molding (Fig. VII) •Since the mold can be closed with the parts incorporated in the core, it can also be used for manual insert molding.
2 － M5×8
2 － M5×8
Wing cam
24.8
＋ 0.02 0
38 0 －
0 －
38 0 －
25 0 －
15
25
0.01
0.01
0.01
0.01
19 14.4
8
24.8
24.8
12.5
12.5
4 0 －
0.02
R0.5
(IV) Replace with secondary cam Wing cam is closed
(V) Mold closing Wing cam spreads outside and prevents slide core collision. The slide core does not move.
11
24.8
24.8
②
Wing cam
2 － M5
R4 ＋ 0.3 ＋ 0.1
s Surface treatment
Part Number
No.
Name
Quantity M Material H Hardness
⑦
Secondary molding
Guide rail
① a Primary side cam
58–60HRC 58–60HRC
– –
1 1
① SCWMA 6–25 (Primary side)
⑥ Slide core
Leaf spring
Alloy Steel Tool
Nitriding treatment 1000HV–
⑦ Guide rail
1
38–42HRC
Example of molding
25 0 －
⑧ Ball plunger
1 1 1 1
–
–
– – – – – – –
0.01
11
① b Secondary side cam ② Wing cam (left / right)
58–60HRC 48–52HRC 58–60HRC
－ 0.15 － 0.25
SCWM 6–25 ①+②
38
8
Alloy Steel Tool
③ Backing plate
② SCWMB (Secondary side)
② SCWMB 6–25 (Secondary side)
④ Heat–resistant leaf spring ⑤ Countersunk bolt SFB2.5–6
1 SUS301H
1 1
SUS304
24.9
⑥ Slide core
58–60HRC
Alloy Steel Tool
Nitriding treatment 1000HV–
⑦ Guide rail
1
38–42HRC
(VI) Mold closed Wing cam returns to its original position
(VII) Mold opening Closed wing cam returns slide core
⑧ Ball plunger
1
–
–
–
■ Characteristics A two–color molded slide core has been completed with a special structure that uses a swinging wing cam. ① Space saving The mold can be made one rank smaller than the existing structure. ② Total cost reduction • Achieved low cost due to its simple structure. • Two–color molding is possible just by setting the slide core. Design time and processing cost can be reduced. • No need for troublesome calculations such as slide strokes. ■ Notes • This product is developed for injection molding die. Do not use for any other purpose. • Be sure to apply grease to the sliding surface to prevent it from burning.
Part Number
Part Number
– W – 25
W
Order
Type
ST
SCWM6
SCWM ( ① SCWMA +② SCWMB)
① SCWMA (Primary side) ② SCWMB (Secondary side)
Delivery Quotation
6
25
583
584
Powered by FlippingBook