1.Used for the molding of undercut area, the different steel should be used whenever possible;otherwise nitride hardening treatment needed.

2. General guideline:

•    try to minimize dim. A;
•   B≥ 2/3H, higher the center of mass;
•   10° ≤E≤25°
•   F>E,the minimum difference 3o ,r=0.063”~0.125”;
•   diameter of angle pins: Ø3/8,1/2,5/8,3/4,1-1/4,excluding Ø7/8,chamfer preferred  at the end;
•   minimum 1/8” added to required travel and one operation diagram needed;
•   C=0.6H or 0.6L,the larger,the better.

3. Recommended design data(inch):

 

L	Slide Length	L	6	5	4	3	2.5	2	1.5
H	Slide Height	H	6	5	4	3	2.5	2	1.5
A	Guide fixed Height	1/3H	2	1.63	1.32	1	0.82	0.69	1.6
B	Guide Height	2/3H	4	3.32	2.68	2	1.68	1.32	1
C	Guided Length	6H OR 6L	3.6	3.0	2.4	1.8	1.5	1.2	0.9

4.Two angle pins and another guide rail centered are employed when Dim. Z is over 4-1/2”.

5.  the contact point should be lowered for smooth running.

6.the delayed slide move can be acquired by increasing the clearance between angle pin and slide,which is very usefull when the parting sequence is needed.

7. the wear plate of heel block should be used when the most of slide(>2/3) is buried into cavity side.wear plate is fixed directly to moldbase with a thickness of 1/4″.

8.  the style depicted in the following diagram was suggested when the most height  of slide(>2/3) is buried into core side.the key features are the clearance and backup area(It’s needed when an higher injection pressure expected).

 

9.  the style depicted in the following diagram was suggested when an smaller injection pressure expected.

10.  the wear plate design

It’s should be used for the easy repair after wearing out and where two components move against each other.

material:
(1)  0-1 ST’L 54~56HRC
(2)  Lamina Bronze
(3)  thickness ¼”(6.35mm)

The width of std. component :3/4,1,1-1/4,1-1/2,2,2-1/2,3 and 4.the oversized wear plate must be redesigned as following:

11.  the guide rail design

1.     used for guiding the movement of slide and repair when wearing out.

2.     Material: AISI 01 or DIN1.2510 ,54~56HRC.

3.     Lubrication oil slot added to all the guide rail and wear plate.(SP-00-02.24) when AISI 01 used

12. retaining of slide at end of stroke

(i)compression spring;
(ii)plunger;
(iii)DME slide retainer;
(iv)SUPERIOR slide retainer.

13. compression spring was preferred in the following condition:

14. DME slide retainer

•  select the retainer per the weight of slide;
•  used for the slide located in B,C,and D,excluding A;

Model	A	Weight of Slide
PSL0001	1.5	22LBS/10KG
PSL0002	2.13	44LBS/20KG
PSL0003	3.38	88LBS/40KG

 

15.  SUPERIOR slide lock

• used for the slide located in B,C,and D,excluding A

Model	Weight of Slide
SLK-8A	8LBS/3.6KG
SLK-25A	25LBS/11KG
SLK-50A	50LBS/22KG

16.   The hydraulic cylinder should be employed when the effective length(H) of angle pin is greater than 7”.

17.   The preferred hydraulic slide design:

 

18. The early ejector return
18.1 The early ejector return used when ejector pins placed under the slide. Two kinds of machanisim used:
(i)round bushing unit;
(ii)safety pin.
18.2 round bushing unit

19. safety pin
The ejection system can’t be pushed forward before the slide is fully retracted.

 

20. the preferred design and fixing of slide pins

21.the following design used when releasing the round undercut and every part has one pairs in the multi-cavity mold.

 

22. the effective length of leader pin adjusted :

See leader pins & alignment part section for details.

23.the design of lifter

•  Used for the internal undercut releasing;
•  the steel for main block and lifter should be different:
•  the fitting clearance needed for the nitriding;
•  three design styles used;
•  Bronze retaining block located on the back side of B plate need for smooth operation of the longer lifter.
•  the fitting length is greater than two times of the lifter travel.

Main Block	Lifter
H-1348~52 HRC	S-754~56 HRC
S-754~56 HRC	H-1348~52 HRC(nitriding)
420 SS  48~50HRC	H-1348~52 HRC(nitriding) 420SS  50~52 HRC(nitriding) 440SS   56~58 HRC(nitriding)
P-2035~38 HRC	H-1348~52 HRC(nitriding)

 

 

24 The lubrication oil slot

• used for decreasing the wear of moving component.
• slot size: 0.50 X1.0~2.0(DepthX Width).
•  oil slot should be a closed profile.
•  The minimum radius 0.30mm.
•  The number of oil slot kept to a minimum.
• The lubrication oil can’t exposed to plastic part space.