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Four Cylinders Fully Hydraulic Plastic Injection Molding Machine

Model injection unit JPH10 JPH30 JPH50 JPH80 JPH120 JPH150 PET180
Screw model     A B A B C A B C A B C A B C A B C
screw diameter mm 18 20 25 28 33 36 31 36 42 38 42.5 45 40 45 50 45 50 55
screw L/D ratio L/D 21 24 20 21 19 18 22 20 18 20 18 17 22.5 20 18 20 19 17
shot volume cm3 15 31 50 73 102 122 102 137 187 181 227 254 201 254 314 315 388 470
shot weight g 13.4 28 45 66 91 110 92 124 168 163 204 229 181 229 282 283 350 423
oz 0.5 1 1.6 2.3 3.2 3.8 3.2 4.3 6 5.8 7.2 8 6.4 8 10 10 12.3 15
injection rate g/s 35 32 50 58 80 95 98 105 125 72 92 102 90 115 140 111 137 165
injection pressure MPa 265 318 204 222 160 134 207 154 113 202 162 144 224 177 143 199 161 133
plasticizing capacity g/s 3.5 4.3 6.5 8 11 13 10 13 17 14 17.5 19.5 15.5 19.5 24 20 24 29
screw speed rpm 220 220 220 210 210 210 200 200 200 200 200 200 200 200 200 160 160 160
clamping system hydraulic
clamping force KN 100 300 500 800 1200 1500 1800
distance between tie cm 200 260x260 295x295 360x305 410x360 410x410 460x460
clamping stroke mm 220 280 380 540 540 620 700
Max. daylight mm 350 430 530 700 700 800 900
closed daylight (min) mm 130 150 150 160 160 180 200
ejector stroke mm 50 60 60 150 150 150 150
ejection force KN 20 20 25 41 41 45 45
oil tank capacity L 100 150 180 180 210 210 300
pump motor KW 4 5.5 11 11 15 15 18.5
heating capacity KW 2.7 3.8 4.9 6.9 7.6 8.7 12.3
machine weight kg 1000 1300 2500 3500 3600 4800 5500
 
  • Structure and action analysis for clamping unit:
    • (see above picture) four piston rods (tie rods) cross through the movable platen and their ends are fixed on the four angles of the stationary platen and the back stand. Four cylinders are sleeve over the piston rods and fixed on the movable platen. Two mold-moving cylinder are assembled between the movable platen and back stand or between the movable platen and the front stationary platen. The mold-moving cylinder drive the movable platen to open or close the mold, and the high pressure clamping is fulfilled during the process that the pressure oil is filled into four cylinder.
         The four bars are stressed evenly, and the force line is shortened by 40%, the system has a good rigidity.
         the clamping force repeats precisely.
         The clamping force can be controlled according to the feedback of the injection pressure.
         the position of the mold can be adapted automatically.
         High precise products can be molded, such as gear, lens and CD. 
  • It is favorable for long core products, and molding big products by a small Model machine can be available.
    •    compare with the toggled type injection molding machine, the opening stroke of our machine is 1/3 longer and can be further extended according to the user's requirement.
         there are three position points on each of the four cylinders enable the movable platen to conduct quite a long guide for its smooth motion. This feature facilitates to make the long core products.
  • the longevity of the machine and the mold can be increased by more than 50%
    • There are no wear and tear in the pin and spindle that always occur in the toggle machines.
      Low pressure protection is sensitive and reliable.
      the tie bars (column bars) can bear heavier pull because they are stressed evenly and force line shortened by 40%.
      the mould is stressed evenly.
      The clamping force will decrease once the injection is over. therefore, the heavy load bearing time of the machine and the mold will be shortened by more than 3/4.
  • The speed increase by 20%, energy saving by 10%
    • with 2 mold-moving cylinder and 4 clamping cylinders, the contradiction of the force and speed can be resolved.
    • the oil circuit between the left and right chamber of the clamping cylinders is quite short and resistance is very low.
    • the right chamber of cylinder is compensated by the pressure oil from the left chamber of the same cylinder. The following trouble in the traditional liquid-filled injection molding machines can be avoided: crawling and time-consuming in the pressure increasing process usually occurs as a result of insufficient vacuum oil-suction.
    • The time for multiplying the oil pressure is only 1/5 of the tradiitonal fully hydraulic injection molding machines.
    • No multiplied oil refilling will be needed to the clamping cylinders while pressure holding is in processing.
    • The action will be more stable, more accurate and faster by four section control to the clamping force and speed.
    • Compared with the foreign fully hydraulic machines, more than 1/3 hydraulic units have been reduced and the energy saving of 15% is realized by an advanced design and smart matching of the hydraulic system.
  • other merits:
    • no mold adjustment is needed.
    • there are few wear-and-tears in the clamping system and no lubricant is to be supplied.
    • there are pnly a few stressed parts in the clamping system. the mechanism and hydraulic systems are quite simple. the maintenance is easy and the charges for it can be saved a lot.
    • The clamping force increase accordingly, up to 1.5 times, with the growth of the injection pressure during injection to ensure the mold-relieving can be avoided.
    • The export standard of the permitted leakage volume is only 1/100 of the JIS (Japanese industrial standard)
    • There is an option of press injection feature for multi-molding requirements.
 

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Add: Te 1#, Guanshan 2nd Road, International Enterprise Center 3-602, Wuchang, Wuhan, P.R.China
Tel: +86 136 38638896    Fax: +86-27-67845286
e-mail: 
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