VACUUM CHAMBERS

MK Technology Gmbh produces vacuum chambers in various versions and sizes. These offer the following advantages:

- Solid construction, steel wall thickness up to 20 mm, door thickness 40 mm
- Reusable cups and funnels
- Electronic differential pressure system
- Precise pre-selection of pressure by go-to function
- Easy program memory
- Time saving by automatic silicone de-gassing
- Perfect visibility through large glass doors and transparent cups
- Chamber and components: Made in Germany

 

chamber	short description	max cast weight [g]	max mould size [mm]	tech data
MK_mini	This system has been designed for smaller companies, universities and training facilities. Electronics and luxury was deliberately renounced and this way, a solid and very compact machine was created. It is operated manually, which allows a very precise casting even of small quantities. The system is delivered with two heating cabinets and the tool set at an unrivalled favourable price – you can safe the rest.	1400	450x470x400
MKV_system_1	With a casting weight of more than 1 kg, System 1 is perfect for most of the classical rapid tooling applications. It can additionally be equipped with a heating cup to manufacture wax cores for metal investment casting.	1400	450x470x400
MKV_system_2_eco	Easy installation, operation and maintenance, compact and good value. Mechanical 3-way valve pressure control, electrical mixing and tilting.	6000	850x870x800
MKV_system_2	In this chamber, which is basically structured like System 1, components can be manufactured which are twice as large. The whole cup unit can be pulled out for easy charging, mixing and tilting speed are infinitely variable.	6000	850x870x800
MKV_system_2_XL	Side door for big parts, extractable mixing unit, separate pre-evacuation chamber, pressure frame for gravitation cast, removable. Differential pressure system and roller conveyor as standard equipment.	6000	2080x1000x1000
MKV_system_3	This system contains two systems: two Systems 2, to be precise. Each of these systems can be operated autonomously and independent from the other one in order to mould parts up to the size of a television casing. If the size of one chamber is not big enough, both units can be combined automatically to a big chamber by just one touch of a button. Parts up to a length of 2.5 meters and 10 kg overall weight can be cast in this chamber. The system is charge though the side door.	12000	2680x1000x650

OPTIONAL

 

Differential pressure system

The advantages of the differential pressure system

 

If required, MK equips all chambers from System 1 upwards with the so-called Differential Pressure System. Compared to pure gravity casting, this process has the following advantages:

 

 

- Even very sophisticated, complex, very long and thin moulds can be filled perfectly.

- High-viscosity resins as well as fibre-filled resins can be processed without problems.

- Resins with a very short pot life (up to 2 min.) can be easily cast,

- The sprue can be much smaller, which reduces the time for rework.

 

Maximum pressure difference: 100 mbar

Development of pressure difference: 10 - 60 sec.

Neutralization of pressure difference: > 1 sec.

 

Filling time compared to gravitation casting: 1/3

If a vacuum machine is equipped with the differential pressure system, the upper chamber containing the casting and mixing unit is separated from the lower mould chamber by a steel rib. The casting funnel passes through this rib. When the differential pressure system is switched on the upper chamber is flooded to a pre-selected differential pressure up to 100 mbar. As there is still almost a complete vacuum in the lower chamber, the resin is pressed into the mould, accelerated by the differential pressure system.

 

Heating cup

Application of the heating cup

The practical value of the vacuum chamber can be increased tremendously by applying the heating cup. Now wax patterns can also be made using the same technology and the same silicone moulds. While the investment casting industry continues to grow, there is an ever increasing demand for quality wax patterns.

Temperature: 30° - 120° C

Capacity: 1.3 or 6 ltr.

 

Turning table

The advantages of the turning table

- evacuation of several moulds

- turning table to be mounted by a single operation

- height-adjustable by means of a lift

 

- practical and time-saving

With the aid of the turning table, several moulds can be filled during the evacuation process. The appropriate quantity of resin is filled into the funnel and flows into the mould below. Then the next mould is positioned under the drain by means of a key switch, and filled. Especially resins with a longer pot life are suitable for this process. The turning table can also be mounted later on by a single operation, provided that the system has been ordered with the respective preparation. In connection with the lift, the whole unit can also be adjusted vertically.

Vacuum casting resins

code	description	viscosity [mPa.s]	mix ratio  [pbw]	potlife [min]	hardness [shore]	flexural modulus [MPa]	Tg [°C]	tech data
VC3300	Three component, variable shore A hardness. Simulates rubber.	450-900	variable	2-2,5 (40°C)	35 to 95 A	-	-
VC3351	UV stable water clear. Simulates PC, shock resistant PMMA and ABS.	100-350	100 : 120	8-10 (25°C)	75-80 D	2150-2450	86-90
VC3360	Translucent, high modulus and heat resistance. Simulates nylon.	600-900	100 : 120	3-4 (40°C)	80-85 D	3000	82-87
VC3362	Simulates ABS.	280-380	100 : 100	3,5-4,5 (25°C)	87-92 D	2400-2700	110-114
VC3364	Brilliant white, simulates shock resistance PMMA and ABS.	500-850	100 : 100	7-10 (25°C)	82-87 D	2300-2750	65-70
VC3365	Glass filled, very rigid. Simulates polyamides	500-1000	100 : 110	3-4 (40°C)	87-92 D	2900-3300	90-95
VC3385	Impact resistance and elasticity. UL94 V-0	500-800	100 : 120	7-8 (25°C)	85-90 D	2250-2750	97-101
VC3391	Translucent, cost effective, simulates ABS and some PS.	260-340	100 : 110	2-3 (40°C)	83-88 D	2300-2600	68-72
VC3392	Temperature and impact resistance. Similulates ABS	600-1000	100 : 150	6-9 (25°C)	80-85 D	1100-1300	137-142
VC3398	UV resistant, clear, mercury free. Simulates PC, PMMA, ABS	100-300	100 : 140	6,5-7,5 (25°C)	85-90 D	1500-2000	130-140
VC3399	Very high temperature and impact resistance. Simulates PC, PMMA, ABS	300-500	100 : 130	5,5-7,5 (25°C)	85-90 D	1950-2250	150-160
Renishaw SG95	ABS-type, excellent optical properties. Snap closures, low temperature applications.	A 1300 / B 130	100 : 150	5	74-82 D	2400	68
Renishaw 8051	ABS-type, high temperature resistance, strong flexing properties. Panels, enclosures.	A 750 / B 180	100 : 200	5	77-84 D	2200	90

  

Silicones