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    Common troubleshoot methods highlights Date:2010-12-6 00:00:00

    1. The oil pump motor failure:

    (1). If any abnormal noises, should check.

    A. the power switch and wiring is correct.

    B. pump is damaged, in order to replace.

    C. hydraulic whether to exceed ratings, check total pressure relief valve (V21) and proportional valve (VP).

    D. if motor burned up, and the replacement of the damaged motor.

    E. inspection supply power supply.

    F. motor rotation direction correctly.

    (2). If motor suddenly stopped working, should check:

    A. motor thermal overload relays on whether the reset button for overload and bounces? If there is a need to adjust current load the highest value, problems such as processing, 2 minutes beginning can then click on the reset button and start motor.

    B. start motor relays and other insurance whether the switch has burned? Replace burned components.

    C. if motor has burned? Replace damaged motor.

    D. check emergency stop button, and other relevant wiring.

    2 pump rotation, but no work pressure:

    (1). Oil pump steering correctly, if turn right, still no work pressure, shall be immediately stop. Please note: in dividing pumps, pump repair after internal components should be according to the original correct position pack to return oil pump, or even rotating pump in the right direction, also cannot produce work pressure.

    (2). External things obstruction relief valve or whether magnetic coil wiring is in good condition, so clean and the good line.

    (3). Pressure gauge whether failure, in order to replace.

    (4). Check for external things of obstruction overflow valve valve core.the move? And if relief valve spring break can also cause similar problems.

    3. Can't clamping, including cannot completely lock:

    (1). The pistons on sealing ring in order to replace damaged, ever.

    (2). Whether completely shut, security of travel switch security SQ1, SQ2, whether SQ3 pressure was live, or internal wiring are in good condition.

    (3). The clamping force is enough, by increasing the clamping pressure or adjust low modulus care and low-pressure turn high-pressure travel place, make the clamping force enough.

    (4). Ejector bar back exactly whether.

    (5). Reversing valves whether have external things, so as to remove blocked.

    (6). Check control cycle of clamping the electric device reply whether there is a failure? The emitting and receiving part is installed to the most proper position.

    (7). The moulding-adjustment thickness undeserved, should be increased RongMo thickness.

    (8). Check the clamping termination position.

    4. Can't open mold:

    (1). Check whether the location open mold terminated properly.

    (2). Whether reversing valve valve core.the a foreign body obstruction, electromagnetic valve coil wiring are in good condition.

    (3). Adjustable high speed, namely open mold cavity slowly turn fast travel set to 0, using hand open mold.

    (4). Improving cavity pressures, flow.

    (5). Check the sealing ring is damaged piston ring.

    (6) sometimes for injection molding of products in the mould retention time is too long and cause the so-called "rose mould" phenomenon, then can use increase cavity pressure and velocity and will be a slow open mold schedule set to 0 to solve.

    5. Lose high-pressure clamping force:

    (1). Adjust mould thick.

    (2). Adjust low-pressure turn high-pressure travel switch position, if damaged should change in time.

    (3). Check the oil temperature normal oil temperature should be inside 30 ℃℃- 50.

    6. Injection action failure:

    (1). Injection seat forward termination travel switch has not been pinned (semi-automatic, automatic operation).

    (2). Whether reversing valve a foreign body obstruction, magnetic coil of wiring are in good condition.

    (3). The pistons on sealing ring is in good condition.

    7. Pre plastic action failure:

    (1). A nitrogen-treated barrel heating temperature is enough, heating element any damage.

    (2). Whether the motor oil beforehand plastic damage.

    (3). Reversing valves are eyewinker obstruction.

    (4). Hind nitrogen-treated barrel temperature exorbitant.

    (5). Whether there is a foreign body in a nitrogen-treated barrel inside.

    (6). Check pre plastic pressure is enough.

    (7). The injection termination inappropriate position. Schedule

    (8). The motor oil speed too low.

    8. To inject screw abnormal rotation, injection quantity unstable:

    (1). Injection parts combination especially check inverse ring damage, cannot stop when molten soluble plastic injection flow backward, causing screw rotation.

    (2). Whether the motor oil beforehand plastic damage.

    (3). Check is damaged.

    (4). Electric incorrect actions. Whether

    9. Injection screw rotation, but screw not feeding:

    (1). Back pressure valve damage, or adjustment is too high.

    (2). A nitrogen-treated barrel to the rear of the cold water circle by blockage or cooling water shortage, plastic melt in nitrogen-treated barrel near the entrance, so slow down even jams other plastic into a nitrogen-treated barrel, the solution is to shut down a nitrogen-treated barrel posterior segment electric supply, pull open hopper clear molten plastic, the regulation again appropriate nitrogen-treated barrel tail temperature.

    (3). Screw whether have embrace material, if have, dismantling or unpick screw, nitrogen-treated barrel.

    (4). Hopper anticipate.

    10. Injection seat dilemma action failure:

    (1). Whether reversing valve stuck.

    (2). Electromagnet coil wiring are in good condition.

    (3). The pressure is enough.

    (4). The pistons on sealing ring is damaged.

    11. Liquid top withdrew failure:

    (1). Whether reversing valve stuck.

    (2). The other is alexandrine.

    12. Pre plastic material: when leakage

    (1). Back-pressure whether too high.

    (2). Whether reversing valve is damaged.

    13. Moulding-adjustment action failure:

    (1). Whether gets stuck, electromagnet directional control valve coil wiring are in good condition.

    (2). Template parallelism conform to requirements.

    (3). The horizontal position whether deformation.

    (4). The drive motors is damaged.

    (5). The pressure is enough.

    (6). Driving gear is flexible.

    (7). The other is alexandrine.

    Plastic products malnutrition and processing method

    Molding defects except some occurs in the machine performance, mould design or material characteristics itself outside, most reliable adjustment problems to solve the operating conditions.

    Adjusted operating conditions must be paid attention to:

    A. every change a factor see the result again change another one.

    B. must observe after adjustment over a period of time, stay balanced stable operation results of revolutions. Pressure changes in one or two mould namely known results, and the time especially temperature changes need to observe the results after 10 minutes of ability to calculate stability results.

    C. Familiar with flaws possible reasons and priority adjustment factor, the following partial explanation flaws, its possible reasons and countermeasures.

    Some shortcomings and reason is restricted to certain reasons, some faults are from a number of causes.

    10-1 finished product is incomplete (short shot)

    Failure causes: processing methods:

    A. raw material temperature is too low, improve nitrogen-treated barrel temperature

    B. injection pressure is too low improve injection pressure

    C. pre plastic quantity insufficient increased measurement itinerary

    D. injection time too short growth injection time

    E. injection speed too slow speed up injection speed

    F. mould temperature is too low, improving mould temperature

    G. mould temperature unevenness re-adjusted mould conduit

    H. mould exhaust adverse proper position with moderate the vent

    I.nozzle blockage dismantle cleaning

    J. incoming average reopen mould overflowing mouth position

    K. runner or excessive mouth is too small increase runner or excessive mouth

    L. raw material lubricant. ZhuoJia within lubricant enough

    M. screw stops inverse ring (after aprons) wear dismantle check repair

    N. machine injection quantity insufficient replacement larger machines

    10-2 MARK) shrink (SINK MARK)

    Failure causes: processing methods:

    A. pre plastic volume insufficient increase plastic measurement trip. Gets

    B. injection pressure low improve injection pressure

    C. holding pressure not improve holding pressure

    D. injection time too short growth injection time

    E. injection too fast reduce speed

    F. overflowing excuses not to balance adjustment mould entrance size or position

    G. nozzle blockage dismantle cleaning

    H. material temperature exorbitant reduce feed temperature

    I.mold temperatures improper adjustments appropriate temperature

    J. cooling time enough to pour delay cooling time

    K. exhaust bad in shrink place set vent

    L. finished product itself or its RIB (RIB) and column

    (BOSS) too thick review of finished products

    M. nitrogen-treated barrel too much smaller specification material replacement cone

    N. screw stops inverse rim wear dismantle overhaul

    10-3 finished PRODUCT STICKING later (easiest equipment), packing satiety (OVERPACK)

    Failure causes: processing methods:

    A. injection pressure is too high reduce injection pressure

    B. dose excessive use tuomoji

    C. the holding time too long to reduce the holding time

    D. injection too fast reduce injection velocity

    E. material temperature is too high reduce feed temperature

    F. feeding uneven make part too full mouth size or change overflowing position

    G. cooldown increased insufficient cooling time

    H. mould temperature too high or low temperature adjustment mode on both sides and relative humidity

    I.mould has demoulding chamfering (UNDERCUT) repairing mold remove chamfering

    J. mould surface not only lighting mold

    10-4 runner (shuikou) STICKING later (SPROE equipment)

    Failure causes: processing methods:

    A. injection pressure is too high reduce injection pressure

    B. heating temperature is too high temperature adjustment

    C. runnet excessive modify the mould

    D. runnet cooling not prolong cooling time or lower for stove temperature

    E. runnet demoulding Angle enough revision mould readjust its cooperate increase Angle

    1. SPRUE concave arc (SPRUE BUSHING)

    And shoot with corruptive readjust its mouth to cooperate

    G. runnet inside surface or have not only demoulding chamfering overhaul mold

    H. sprue holes have damaged the overhaul mold

    I.without runnet catch lock (SNATCH PIN) described.compare catch lock

    J. packing satiety reduce injection dose, time and speed

    10-5 wool, phi feng (FLASE)

    Failure causes: processing methods:

    A. heating temperature is too high lower heating temperature, lower mould temperature

    B. injection pressure is too high reduce injection pressure

    C. packing satiety reduce injection time, speed and dose

    D. shut the mould LINE (PARTING LINE) or seal face (MATING SURFACE) bad repair mold

    E. clamping pressure increases enough clamping pressure

    F. products umbriferous area excessive clamping pressure change of large machines

    10-6 open mold or ejector when finished rupture (CRACKING)

    Failure causes: processing methods:

    A. packing satiety reduce injection pressure, time, speed and adhesive volume

    B. mould temperature too low rise higher mold temperatures

    C. part demoulding Angle enough overhaul mold

    D. have demoulding chamfering overhaul mold

    E. finished demoulding cannot balance from overhaul mold

    F. thimble enough or inappropriate position of overhaul mold

    G. demoulding die produce vacuum is open mold or reduce ejection slow, add inlet equipment

    10-7 combining WELD line (has)

    Failure causes: processing methods:

    A. plastic melting plastic temperature; improve poor Improve back-pressure, Accelerate screw speed

    B. mould temperature too low improving mould temperature

    C. injection speed too slow increase injection velocity

    D. injection pressure is too low improve injection pressure

    E. plastic unclean or mixed with his material inspection raw materials

    F. demoulding oil too much less with demoulding oil as far as possible need not

    G. runner and overflow mouth that is too small or adjust mould entrance size or change position

    H. mould air than relief vent exclude or check the original vent is blocked

    10-8 FLOW LINES (has) blunt

    Failure causes: processing methods:

    A. plastic melting plastic temperature; improve poor Improve back-pressure, Accelerate screw speed

    B. mould temperature is too low, improving mould temperature

    C. injection too fast or too slow to adjust appropriate injection velocity

    D. injection pressure too much or too little adjustment appropriate injection pressure

    E. plastic unclean or mixed with his material inspection raw materials

    F. overflowing mouth too small produce shoot grain increased overflowing mouth

    G. finished section thickness vary too much change finished product design or excessive mouth position

    10-9 SILVER lines, gas sores (SILVER STREAKS)

    Failure causes: processing methods:

    A. plastic contains moisture plastic thoroughly dry, Improve back-pressure

    B. plastic mould temperature is too high or overheating reduction of material temperature, shoot mouth and anterior temperature

    C. plastic in other additives as lubricant

    Dyestuff decomposition reduce its usage or replacement of heat-resistant higher replacement

    D. plastic in other accretion mixed unevenness thoroughly mix evenly

    E. inject injection velocity slows too fast

    F. mould temperature is too low, improving mould temperature

    G. plastics grain higher.just unevenness using granular uniform of raw material

    H. nitrogen-treated barrel inside clip has air cylinder reduce feed posterior segment temperature, Improve back-pressure

    I.raw materials in the mould processes improper adjustments overflowing mouth size and position to keep average mould temperature

    10-10 finished product surface not luster

    Failure causes: processing methods:

    A. mould temperature is too low, improving mould temperature

    B. plastic dose not increase injection pressure, speed, time and dose

    C. mould has too much demoulding oil brush try clean

    D. mould surface is water brush try and check whether leaking

    E. mould surface not only mould lighting

    10-11 finished deformation (WARPING)

    Failure causes: processing methods:

    A. finished ejection still cooling lower mould temperature; Extend the cooling time, Reduce plastic temperature

    B. finished product shape and thickness of asymmetric stripping to men-tion styling frame fixed change after forming design

    C. feeding overmuch reduce injection pressure, speed, time and dose

    D. several overflowing mouth incoming average change overflowing mouth

    E. ejection system imbalance improve ejector systems

    F. mould temperature uneven mould temperature adjustment

    G. nearly overflowing mouth part raw material too loose or too tight increase or decrease injection time

    10-12 finished within stomatic (AIR BUBBLES)

    Failure causes: processing methods:

    Filler amount to prevent excessive shrink:

    A. finished section, rib or column too thick change finished product design or excessive mouth position

    B. injection pressure is too low improve injection pressure

    C. injection time shortage increases injection time

    D. runner gating overflow mouth is too small increase and entrance

    E. injection too fast adjust for slow injection velocity

    F. plastic water cut of plastic completely dry

    G. plastic high temperature that decomposition temperature. Reduce plastic

    H. mould temperature not average adjustment mould temperature

    I.the cooling time is too long reduce mould cooldown, use water bath cooling

    J. water-bath cool nasty cut short time or improve water bath temperature water-bath

    K. back-pressure enough improve back pressure

    L. nitrogen-treated barrel improper temperatures reduce nozzle and anterior temperature, improve after barrer temperature

    10-13 BLACK SPOTS (BLACK always conquered by)

    Failure causes: processing methods:

    A. raw material TongGuan overheated parts attached completely empty shoot; wall Demolition nitrogen-treated barrel cleaning, Reduce plastic temperature, Cut short the heating time

    B. plastic mixed with a foreign body, wastepaper, the examination such as plastic, Completely empty shoot

    C. into a mould produced when BURNING focal spot (MARK) reduce injection pressure and speed, Reduce plastic temperature, Strengthen mould vent; Pour down shut the mould pressure; Change the entrance location

    D. nitrogen-treated barrel inside the material overheating one-off check the nozzle and the interface between a nitrogen-treated barrel have clearance or corrosion.

    10-14 BLACK lines (BLACK STREAKS)

    Failure causes: processing methods:

    A. raw materials to high temperature reducing nitrogen-treated barrel temperature

    B. screw speed quickly reduce screw speed

    C. screw with a nitrogen-treated barrel eccentric and produce high friction heat repair machines

    D. nozzle aperture is too small or high temperature adjusting aperture or temperature

    E. nitrogen-treated barrel or machine more refueling excessive tube or machine

    10-15 stable period (a) CYCLEE HARMONIC

    These are some kinds of problems, its causes and countermeasures mostly CYCLE (pa), to keep a stable relevant. Because no matter plastic in nitrogen-treated barrel proper plasticizing, or die, the constant temperature keeping hot balanced result, also is in the whole continuous operation, nitrogen-treated barrel of plastic accept screw rotation produce friction from heat, electric heating rings heating, especially electric heating rings heating and heating time relevant, its heat and follow the plastic into the mould. Mold heat from plastics and hot water, loss in finished away, lost in the air or water away. So whether nitrogen-treated barrel or mould to make its temperature is kept constant, must maintain its entry thermal equilibrium to make its access heat balance is necessary to maintain a constant cycle time. Such as cycle is a nitrogen-treated barrel ever faster, so that the hot enough to make ends meet plasticizing raw material, mould of hot then into more than out, so that the mold temperatures rise and will have the opposite of the results. So in any molding operation, especially embedded parts manual must control stability cycle time, avoid speed is differ. Like other conditions remain unchanged are:

    Cycle speed will cause: a short shot, shrinkage, deformation, sticking later.

    Cycle delay slow will cause: overflow, wool, sticking later, deformation, raw material is overheating, even scorched, residues in modules of the focal material and may cause mould damage. The overheating nitrogen-treated barrel raw material and may cause a nitrogen-treated barrel corrosion and finished product appeared dark spots or black lines.

    10-16 recycled materials

    Must consider recycling material qualitative hardness must and new material is same, the most ideal recovery is continuity crushing, drying, processing, make not recycling material storage put too long, crushing particles as far as possible and new particles close, resin by repeated recycling, will reduce product characteristics, products with special performance requirements when, had better not use recycled materials.

    10-17 screw skid (can't feed)

    Failure causes: processing methods:

    A. nitrogen-treated barrel posterior segment of circulating water, reduce the temperature too high check after barrer temperature

    B. resin dry again not completely dry resin and reclamation and appropriate lubricant

    C. nitrogen-treated barrel and screw wear dismantle refitting

    D. resin particles size exclusion funnel improper feeding port, with other resin cleaning nitrogen-treated barrel

    E. back-pressure and screw speed undeserved resize, reduce speed, small tube; nitrogen-treated barrel increase speed

    10-18 nozzle leak adhesive (runny)

    Failure causes: processing methods:

    A. nitrogen-treated barrel temperature is exorbitant reduce nitrogen-treated barrel temperature, especially the nozzle section

    B. back-pressure adjustment undeserved appropriately lowering back-pressure and screw speed

    C. the whole process enough for increased the whole time, change into nozzle head is designed

    SOUND servo injection molding machine best-selling southeast Asia

    Recently, the Philippines SUNLICK corporation Marketing Department cruz manager of excitement to SOUND signed company brand-new launched three sets SE - 580 servo machine. According to cruz reflected: "SOUND servo machine and the same type product manufacturer, compared with configuration level is high, and job performance and stability of advantages, is well received by customers. He said, SUNLICK will push SOUND products in the Philippines market sales.

    Participate in negotiations management company ZhangZhiMing manager said: this is the company develops the beginning of southeast Asia market strategy, except the Philippines market outside, at present, Vietnam markets also have the good information feedback, these days is combing orders. The company to tap into southeast Asia market confidence.