Hardened steel: Typically the most expensive material to use for a
mold, and generally the longest-lasting (which can drive down price
per unit). This makes hardened steel a good material choice for
products where multiple hundreds of thousands are to be produced.
Prehardened steel: Does not last as many cycles as hardened steel,
and is less expensive to create.
Aluminum: Most commonly used for single cavity "Prototype Tooling"
when a relatively low number of parts are needed for testing. Once
the injection molded parts from this tool are tested and approved,
then a multi cavity steel production tool is produced. It is
possible to get many thousands of parts from an aluminum tool but
typically it is used for lower quantities.
Beryllium-Copper alloy: Typically used in areas of the mold that
need fast heat removal or where shear heat is concentrated.
Just as with overall product design, mold design is another
opportunity to prevent defects during the injection molding
process. We have previously written blogs on the Top 10 Injection
Molding Defects and Avoiding Mistakes in Injection Molding, but
here are some examples of how poor mold design can be a costly
mistake:
| SPECIFICATION | HJF-140 |
| A | B | C |
| Screw Diameter | Mm | 38 | 42 | 45 |
| Screw L/D Ration | L/D | 22.1 | 21.6 | 19.5 |
| Shot Size(Theoretical) | cm3 | 193 | 227 | 278 |
| Injection Weight(PS) | g | 176 | 206 | 252 |
| Injection Rate | g/s | 94 | 105 | 135 |
| Injection Pressure | MPa | 205 | 159 | 140 |
| Screw Speed | rpm | 0~220 |
| Clamp tonnage | KN | 1400 |
| Opening stroke | mm | 380 |
| Space Between Tie Bars | mm | 420*420 |
| Max.Mold Height | mm | 450 |
| Min.Mold Height | mm | 170 |
| Ejector Stroke | mm | 120 |
| Ejector Tonnage | KN | 33 |
| Max.Pump Pressure | MPa | 16 |
| Pump Motor Power | KW | 13 |
| Heater power | KW | 7.2 |
| Machine Dimension(L*W*H) | M | 4.5*1.2*1.7 |
| Machine weight | T | 4.2 |
| Oil Tank Capacity | L | 230 |
High efficiency, Energy-saving and high precise proportional
pressure and flow variable displacement pump system make the out of
the hydraulic system matching the required power for entire machine
operation without loss of high pressure throttle and overflow
energy. As comparedwith constant displacement pump, t saves power
by 30%~60%.A motor with same power may be fitted with an oil pump
of bigger displacement and thus accelerates the speed of
machine.Besides, the low oil temperature will prolong the service
life of sealing elements.
Buffer device is used in every mold opening and clamping oil way to
ensure steady mold opening and clamping operation without any
impact.Besides, differential mold clamping operation is fitted to
ensure high production efficiency.
High Energy saving
Under the ideal working state, Power consumption is 40% less than
that of variable displacement pump and 70% less than that of fixed
displacement pump, save the cost effectively.
High precision
Precise control of low pressure & low flow, repeating precision is
less than 0.5%. Weight error of the products is 0.4%~0.7%, with
semi-close loop system nearly.
Fast response
With steady capability, servo gearshift dynamical control system
has equipped with pressure feedback device with high precision and
sensitivity, which forms close-loop precision control, cycle time
effectively shortened and improving production efficiency.
Oil temperature rise slowly
The system can restrain arising of oil temperature, so smaller oil
cooling system can be used in the machine.
PQ control
Control pressure and flow simply by inputting simulated voltage of
pressure & flow into the computer.
Low noise
Different from ordinary fixed pump injection molding machine, servo
power-saving injection molding machine is working only when
necessary. And working noise is less than LOG-A8 series, will be
much quieter for your working area.
