Highly Concentrated Die Casting Release Agent RLT-7730

The good release effect is guaranteed by the spontaneously forming of a water-repellent film on the die surface. The film adheres well, wherever it is applied and will not be washed off by during application nor blown into outlying parts of the die: Therefore gas entrapment and streaks due to release agent accumulations can be mostly prevented.

Even after many weeks in use, no sticky residue will form on die and frame, pipes of spray systems and nozzles will never block. Core slides and vents will stay clean, allowing air and gas to escape unhindered thus improving the quality of castings (reduced porosity).

Properties And Advantages

• Castings are well suitable for joining processes like welding and glueing

• Excellent paintability and powder coating ability of castings

• Tried and tested on conventional, reduced, as well as micro-spraying

• Good die release and good lubrication of ejector pins

• Effective reduction of "metallization" (metal-on-metal welding)

• Excellent and shiny surfaces of castings

• High process reliability (stable emulsion, no separation, no stirring required)

• Clean die frame and environment; no clogging of pipes and spray nozzles

Application

Suitable for a wide spectrum of castings, also for large structural and heavy parts. Die temperatures:from about 150 to 380 °C.

The ultimate or ideal dilution ratio for a particular casting is determined by: duration of spray, spray velocity, geometry and complexity of casting as well as the temperature of the tooling. On-site tests should therefore be carried out to establish the correct ratio for each particular application.

Recommended dilution ratios with tap water

Product      Aluminium and Magnesium

7710:              1 : 100-120

7730:              1 : 250-300

7750:              1 : 400-500

RLT-7710/7730/7750  is available in several concentrations, each of them will dissolve in water instantly. Prior to use,RLT-7710/7730/7750  must be diluted with water.Thereafter the diluted product should not be stirred in order to prevent foaming.Do not use air agitation.Immediately after use,the containers with the release agent concentrate must be closed tightly.

Chemical And Physical Data

FAQ 

1. What is the biggest difference between RLT-7730 and RLT-6620 wax release agent?

   RLT-7730 is ultra-high concentration water-based emulsion with higher dilution multiple up to 1:300, supports micro-spray energy-saving process, and can withstand maximum mold temperature up to 380°C, while RLT-6620 is wax-modified finished agent with lower dilution ratio and 350°C temperature limit.

2. What spraying methods can RLT-7730 adapt to on high-pressure casting lines?

   It supports three mainstream spraying modes: traditional full spraying, material-saving reduced spraying and precision micro-spray, suitable for automated high-pressure die casting equipment.

3. Can magnesium alloy high-pressure castings made by RLT-7730 be welded directly?

   Yes, the thin isolating film leaves no residual silicone or wax pollution on casting surface, welding strength and coating adhesion will not be affected.

4. Why cannot use air stirring after diluting RLT-7730 concentrate?

   Air stirring will produce a large amount of foam, foam will lead to uneven spraying film and cause pores, streaks on high-pressure casting surfaces.

5. Will this release agent block spray gun nozzles after long-term continuous high-pressure casting?

   The micro-fine emulsion particle design avoids pipeline and nozzle blockage; mold frames, core slides and exhaust vents keep clean for weeks of continuous production.

6. What maximum mold temperature can RLT-7730 resist stably?

   The sustainable operating temperature range is 150°C to 380°C, it is the preferred product for high-temperature magnesium alloy high-pressure die casting production.