Below is a simple injection mold design checklist which is an essential tool for us, including a vast number of details in injection mold making, making sure that all components are fit, the dimensions work together and that the mold will ultimately function as it should. We recommend every client also confirm the 3D mold drawings according to some similar checklists.
| - clamping situation |
NG |
OK |
NO NEED |
Remark |
|
|
1 |
Max. Mold height | ||||
|
2 |
mold installation height | ||||
|
3 |
overlaid clamping plate | ||||
|
4 |
clamping slots- holes | ||||
|
5 |
locating ring diameter | ||||
|
6 |
centering ring MS | ||||
|
7 |
nozzle installation depth | ||||
|
8 |
heating band and cabel slot for injection machine enough | ||||
|
9 |
ejector pin according to customer’s requirement. | ||||
|
10 |
label (hot channel,cooling schema,company label) | ||||
|
11 |
transport bridge/tie bar – Transport thread – Transport protection | ||||
|
12 |
insulation sheets MS / FS | ||||
|
13 |
hot channel connector on the top of non operator side | ||||
|
14 |
cooling connector don’t interrupt clamping process | ||||
| - mold assembly | |||||
|
16 |
sufficient mold plate thickness | ||||
|
17 |
countour with insert | ||||
|
18 |
countour in moldbase | ||||
|
19 |
the angle of wedge is 5 degree by milling designed | ||||
|
20 |
nozzel radius R mm | ||||
|
21 |
ejector plate guidance | ||||
|
22 |
support pillars in the ejector room. | ||||
|
23 |
enough ejection stroke | ||||
|
24 |
return pin | ||||
|
25 |
locking for side pressure | ||||
|
26 |
slide locking on the mold plate is one unit | ||||
|
27 |
angular pin diameter enough | ||||
|
28 |
ejector system switch | ||||
|
29 |
support legs | ||||
|
30 |
pressure plate for parting surface | ||||
|
31 |
parting line on the mold plate?(if mold on the plate ) | ||||
|
32 |
Hydraulic connector according to customer’s requirement. | ||||
| - inserts and slide | |||||
|
33 |
Material according to Specification | ||||
|
34 |
the mount and position of ejector pins/ fixed.. | ||||
|
35 |
venting slots or inserts | ||||
|
36 |
set limit switch for ejector, which under the slide | ||||
|
37 |
label according to customer’s standard (demountable) cavity label | ||||
|
38 |
enough slide stroke | ||||
|
39 |
slide fixture. (ball guiding-slide lock) | ||||
|
40 |
lifter wearing blocks are made of Bronze / Steel | ||||
|
41 |
insert cores for ribs and hooks | ||||
|
42 |
area/shape of the parting line | ||||
|
43 |
long core or inserts locked from the opposite direction. | ||||
|
44 |
parting line free milled enough. | ||||
|
45 |
guide pin is longer than angular pin | ||||
|
46 |
oil slot on slide and angle slide | ||||
|
47 |
angle slide lower than the mold surface.(no scratchs on the surface) | ||||
|
48 |
if use angle lifter, ejector plate intensity is enough( thicken the ejector plate?) | ||||
|
49 |
pressure plate for slider sink into mold plate 3-5mm.(if not ,add dowel pin) | ||||
|
50 |
for angle slider,pressure plate and wearing plate is one inte | ||||
|
51 |
slider extend into cavity, assemble surface 3°-5°degree diving | ||||
|
52 |
use graphite as wearing plate for big slider. | ||||
|
53 |
slider easy to assemble and disassemble. | ||||
|
54 |
material stick slider and angle lifer. | ||||
|
55 |
parts can drop automaticly or need to use robot when there is anglelifer | ||||
|
56 |
angle lifter has fixing plate( in the middle) | ||||
|
57 |
processing basic point and sealing even surface for angle lifter, | ||||
| - gate system | |||||
|
58 |
cold runner length and gate bar diameter. | ||||
|
59 |
hot nozzel | ||||
|
60 |
hot channel | ||||
|
61 |
needle valve | ||||
|
62 |
brand according to customer’s requirement | ||||
|
63 |
direct connection | ||||
|
64 |
tunnel gate (baffle) with cold channel spread. | ||||
|
65 |
enough tunnel diameter | ||||
|
66 |
bent gate | ||||
|
67 |
auxiliary tunnel gating | ||||
|
68 |
spheriacl calotte (沉头） | ||||
|
69 |
gate cross-section round / trapezium | ||||
|
70 |
changeable gate inserts | ||||
|
71 |
gates / parts fall freely | ||||
|
72 |
sprue puller (undercut) | ||||
|
73 |
Is the Position of injection point right | ||||
|
74 |
monifold as short as possible | ||||
|
75 |
balanced flow path | ||||
| - Tempering | |||||
|
76 |
connectors according to customer’s requirement. | ||||
|
77 |
the number of cooling cycles. | ||||
|
78 |
diameter of cooling holes are big enough | ||||
|
79 |
mold plate temper | ||||
|
80 |
insert temper | ||||
|
81 |
slide temper | ||||
|
82 |
hot nozzel off cold runner | ||||
|
83 |
cooling connector (under/opposite the operator side) | ||||
|
84 |
calculate injection cycle time : ……………….. realizable | ||||
|
85 |
cooling in/outlet mark start form A plate to B Plate from bottom to top | ||||
|
86 |
mini.distance between 2 cooling connectors is 25mm | ||||
|
87 |
mini.distance between cooling hole ,screw hole, ejetor and ejector hole 4mm | ||||
|
88 |
same distance between cooling line and products in ejector and nozzle side | ||||
|
89 |
cooling line as short as possible | ||||
| Some more check points |
NG |
OK |
NO NEED |
Remark |
|
|
1 |
products including shrinkage | ||||
|
2 |
products mirror reflection | ||||
|
3 |
guide pillar ,screw, support pillar, ejector guide bush and locating ring same as drawing | ||||
|
4 |
inserts dimension and depth no different from drawing . | ||||
|
5 |
cooling system and ejector pin don’t interrupt each other | ||||
|
6 |
cooling system and screw don’t interrupt each other | ||||
|
7 |
cooling don’t interrupt insert | ||||
|
8 |
O ring , screww and ejector pin don’ t interrupt each other | ||||
|
9 |
cooling system and screw holes for lifting bar don’t interrupt each other | ||||
|
10 |
side lock , cooling system and screw don’t interrupt each other | ||||
|
11 |
lifting bar and junction box don’t interrupt each other | ||||
|
12 |
lifteing bar and junciton box don’t interrupt each other | ||||
|
13 |
limit switch , return pin and screw don’t interrupt each other | ||||
|
14 |
ejector pins and angle lifer don’t interrupt eachother | ||||
|
15 |
straight clamping slots and locking unit screw don’t interrupt eachother | ||||
|
16 |
ejector pins and support pillars don’t interrupt each other | ||||
|
17 |
ejector sleeve and ejector rod don’t interrupt each other | ||||
|
18 |
mark spring type clearly | ||||
|
19 |
thick pillars for screw and thick ribs cut material | ||||