How often should a Case Injection Molding Machine be serviced?

By hours: daily per shift, weekly at 120, monthly at 500, quarterly at 1,500.

Can different greases be mixed?

No. Lithium and calcium-complex greases separate and bearing heat rises 10 degrees Celsius; purge the old grease first.

What water rise counts as abnormal?

Above 5 degrees Celsius. Inlet 22 and return 28 points to a blocked strainer; clean it, then confirm 20 litres per minute.

How often are thermocouples calibrated?

Quarterly, against a standard probe, replacing anything beyond 3 degrees Celsius.

How long should service records be kept?

At least 12 months, covering a full seasonal swing; audits read trends.

Case Injection Molding Machine Maintenance: Lube, Water, Heat

Quick answer: Service a Case Injection Molding Machine by running hours, not by calendar. A ten-minute daily check covers oil level, oil at 45 degrees Celsius and water at 4 bar; central lubrication cycles every 4 hours and tie bars take 8 g of grease per shift; water circuits are cleaned monthly with a 5 degree rise limit; thermocouples are replaced beyond 3 degrees.

Why Case Injection Molding Machine Service Runs on Hours
Daily and Weekly: Lube Points and Oils
Monthly: Water Circuit and Temperature Rise
Quarterly: Calibration and Spares
Turning the Four Tiers into a Checklist
FAQ

1. Why Case Injection Molding Machine Service Runs on Hours

A press running 6,000 hours a year cannot be serviced by date. Two idle weeks leave grease untouched, two 20-hour shifts wear every joint twice as fast, so count hours and map them onto dates.

Failure modes keep different clocks. A dry toggle pin turns blue within two hours, a fouled water circuit lifts the rise from 2 to 6 degrees Celsius in a month, and a probe drifting 5 degrees pushes the body out of tolerance while the display reads normal.

Tier	Hours	Stop time	Main actions
Daily	20 per shift	10 minutes	oil level, oil heat, water pressure, gate
Weekly	120	1 hour	filters, leaks, platen bolts
Monthly	500	4 hours	water cleaning, oil sample, rise
Quarterly	1,500	1 shift	calibration, heater bands, spares

2. Daily and Weekly: Lube Points and Oils

The daily check is the only one a Case Injection Molding Machine gets every day: oil between the marks, oil at 45 degrees Celsius plus or minus 5, water at 4 bar, safety gate, stop button.

Central lubrication cycles every 4 hours at 40 bar; a blocked distributor pushes pressure to 60 bar with no grease moving, so trust the gauge. Tie bars take 8 g by hand each shift, toggle pins 2 g per point weekly.

Oils do not mix: lithium and calcium-complex greases separate and bearing heat jumps 10 degrees Celsius. Slideways take ISO 68 oil, and weekly work also washes the return filter and re-torques platen bolts to 480 N·m.

Point	Lubricant	Interval	Amount
Tie bars	lithium NLGI 2	each shift	8 g per bar
Toggle pins	lithium NLGI 2	weekly	2 g per point
Slideways	ISO 68 oil	weekly	20 ml
Central pump	lithium NLGI 2	4 hours	3 ml per cycle

3. Monthly: Water Circuit and Temperature Rise

Each month the Y-strainer is rinsed and scale looped out with 5 percent citric acid for 30 minutes, then neutralised and flushed; core and cavity circuits are cleaned separately.

Rise is the sensitive line: inlet 22 degrees Celsius and return 27 is the ceiling, and beyond it flow is short or a circuit bypasses. Each loop is accepted at 20 litres per minute, and 15 triggers a wash.

Fouled, the oil cooler oil climbs from 45 to 55 degrees Celsius and hydraulic life halves, so clean it quarterly and pressure-test at 6 bar.

Inlet	Return	Rise	Action
22 C	26 C	4 C	normal
22 C	28 C	6 C	low flow, clean strainer

4. Quarterly: Calibration and Spares

Drift never raises an alarm; it moves dimensions. Each quarter five probes across three barrel zones and the nozzle are compared with a standard thermocouple, and anything beyond 3 degrees Celsius is replaced rather than trimmed in software. Heater bands are checked by resistance and replaced beyond 10 percent.

Controller oil changes every six months; carbonised oil loses 30 percent of heat transfer, so a setpoint of 80 delivers 68 and flow marks appear.

Spares follow consumption: two band sets, five probes, one seal kit and six filters stay on the shelf, counted quarterly.

5. Turning the Four Tiers into a Checklist

A schedule works once it is on paper. Two sheets serve the Case Injection Molding Machine: one triggered by hours, carrying readings and verdicts; one signed per shift, carrying the name and time of whoever acted.

One 800 tonne press ran three months at a 6 degree rise, oil hit 58 degrees Celsius, and the charge lasted four months at an acid value of 2.4. Nobody had washed the strainer.

Judge maintenance by downtime, not forms: 8 hours a month down to 2 saves more output than the hours cost on a Case Injection Molding Machine.

Conclusion

Service on a Case Injection Molding Machine is a table measured in hours: five readings each shift, lube every 4 hours, 8 g of grease per tie bar, a monthly strainer wash holding the rise at 5 degrees Celsius, and quarterly calibration inside 3 degrees. Get the intervals right and unplanned downtime falls from 8 hours a month to 2.

This article discusses only the container (case body) side of specifications and design intent, and does not cover any handling, loading or use of the contents.