VAC-U-VEST®


Introduction | Why use VAC-U-VEST | Distributors | Warranties | Operation | Product Range | Enquiries
Casting Machinery for
Jewellery & lost wax casting industries  

'VAC-U-VEST®' Vacuum mixers for mixing and pouring
of investment powder, manufactured by ROBOTECH
DEVELOPMENTS, England.

INTRODUCTION

Jewellery casting has a history stretching back thousands of years, but only recently, perhaps during the last 100 years, has there been machinery available, designed specifically to help casters increase productivity with high quality results.

The VAC-U-VEST® machine is a good example of a machine designed solely to solve the problems related to pouring of investment powder, particularly in regards to trapped air bubbles, which lead to high production losses.

The VAC-U-VEST® design is a complete solution to these problems, by incorporating the mixing and vacuuming operations into one machine thus ensuring there is no air present when investing the flasks.

In short, the machine you can see above is COMPACT, ROBUST, and EASY to use, and gives consistently excellent results.

Why use a VAC-U-VEST® vacuum mixer?

We recommend for the following reasons:
Small & medium casting shops
- where mixing is carried out "not under vacuum"
- where pouring is carried out "not under vacuum"
- where there is a separate vacuum chamber, after pouring

The use of the VAC-U-VEST® vacuum mixer, in all the above cases, will -

1) eliminate air bubbles, producing better & consistently high quality casting, with much lower rejects.
2) allow simplied and controlled mixing
3) allow higher outputs.
4) reduce harmful dust release from enclosed mixing chamber.

Medium & large casting shops
- where larger volumes require more mixing capacity
- where new vacuum casting machinery is being used

The use of the VAC-U-VEST® vacuum mixer, in addition to eliminating air bubbles, producing better quality castings, and lower rejects, would also improve productivity, and allow the maximum potential of the latest vacuum casting machinery to be realised.

The VAC-U-VEST® vacuum mixer, is therefore the first in-line piece of machinery for casting operations, where the latest vacuum casting technology and machinery is used.

For example where casters use, YASUI, GALLONI, INTOTHERM, NEUTEC, MARIO DI MAIO, SCHULTHEISS and many other types of vacuum casting machines, VAC-U-VEST® is essential!

DISTRIBUTORS:

We supply all our VAC-U-VEST® to the Jewellery industry through a world-wide network of distributors. In the United Kingdom, we act as our own distributor, and supply Jewellery manufacturers direct from our factory in Stoke-on-Trent.

All our world-wide distributors offer technical advice, and help with the importation and installation & commissioning of our machines. They are also able to service our machines once installed and provide after sales help.

We will be pleased to direct your enquiries to your nearest distributor.

WARRANTIES:

All our machines carry a one- year warranty on all parts, (except pouring taps). Providing the machines are looked after, and cleaned in the correct way, very few replacement parts will be required over life- time of the machine. As yet we have had no instance of a machine reaching the end of their life, after more than 8 years of service in some cases!

SPARES:

If the need arises for replacement parts, we carry an extensive stock of spares, which can be despatched at short notice.

OPERATION:

As the operational information includes a good deal of illustration, we have set up a separate page which can be found by following this link. It should load in around 45 to 60 seconds.

PLATINUM INVESTMENT MIXING - some of these powders are mixed with a chemical binder, which causes problems with mixing under vacuum. Water based investment powders mix into fluid slurry within 1-2 minutes, but the chemical binder based investments cause the mix to "ball" up into a solid mass, which only becomes fluid again after about 2 minutes. To achieve this fluidity, the mixer needs to be capable of breaking down the solid "ball" effect of the chemical binder. The new tabletop "VACUVEST #3" mixer has been designed to do just this.

PRODUCT RANGE

VAC-U-VEST #3 - new! - designed to mix and pour TWO part platinum investment powders under vacuum.

Designed to mix and pour up to a maximum of 3 KGs (or 6.5 LBS) capacity of DRY investment powder in one cycle. (5.4 KGS of Powder and water.)

VAC-U-VEST #5

Designed to mix and pour up to a maximum of 5 KGs (or 11 LBS) capacity of DRY investment powder in one cycle. (7 KGS of Powder and water.)

FLASK CAPACITY

Flask Diameter	Standard Flasks	Perforated flasks
2" - 50 mm	7 each
2.5" - 64 mm	5 each
3" - 76 mm	4 each	3 each
4" - 100 mm	3 each	2 each
5" - 125 mm	1 each

SPECIFICATIONS

Specifications	Metric	Imperial
DRY Investment Capacity:	up to 5kg	up to 11LBS
Max. Flask Height:	229 mm	9"
Flask chamber dia	255mm	10"
Vacuum. Requirement:	10 m 3/ hr 28.5" Hg	8 CFM, 28.5 Hg
Dimensions:	61 x 58.5 x 76.2 cm	24" x 23" x 30"
Net/ Gross weight:	128 / 150 kgs	282 / 330 LBS

VAC-U-VEST # 10

Designed to mix and pour up to a maximum of 10 KGs (or 22 LBS) capacity of DRY investment powder in one cycle. (14 KGS of Powder and water.)

FLASK CAPACITY

Flask Diameter	Standard Flasks	Perforated flasks
2" - 50 mm	12 each
21/2" - 64 mm	10 each
3" - 76 mm	6 each	5 each
4" - 100 mm	5 each	4 each
5" - 125 mm	3 each	2 each
6"- 152 mm	2 each	1 each

SPECIFICATIONS

Specification	Metric	Imperial
DRY Investment Capacity:	up to 10kg	up to 22LBS
Max. Flask Height:	228 mm	9"
Flask chamber dia	337mm	13.1/4"
Vacuum Requirement:	16 m3 / hr 28.5" Hg	10 CFM, 28.5 Hg
Dimensions:	61 x 71.2 x 137.2 cm	24" x 28" x 54"
Net/ Gross weight:	211 / 255 kgs	465 / 562 LBS

VAC-U-VEST # 15

Designed to mix and pour up to a maximum of 15 KGs (or 33 LBS) capacity of DRY investment powder in one cycle. (26 KGS of Powder and water.)

FLASK CAPACITY

Flask Diameter	Standard Flasks	Perforated flasks
3" - 76 mm	8 each	7 each
4" - 100 mm	7 each	6 each
5" - 125 mm	6 each	4 each
6" - 152 mm	4 each	3 each
81/2" - 215 mm	1 each

SPECIFICATIONS

Specification	Metric	Imperial
DRY Investment Capacity:	up to 15kg	up to 33LBS
Max. Flask Height:	260 mm	10.1/4""
Flask chamber dia	400 mm	15.3/4"
Vacuum Requirement:	24 m3 / hr 28.5" Hg	15 CFM, 28.5 Hg
Dimensions:	69 x 81 x 15 cm	27" x 32" x 60"
Net/ Gross weight:	232 / 280 kgs	511 / 618 LBS

VAC-U-VEST #20

Designed to mix and pour up to a maximum of 25KGs (or 55 LBS) capacity of DRY investment powder in one cycle. (35 KGS of Powder and water.)

FLASK CAPACITY

Flask Diameter	Standard Flasks	Perforated flasks
3" - 76 mm	14 each	9 each
4" - 100 mm	9 each	8 each
5" - 125 mm	8 each	6 each
6" - 152 mm	5 each	4 each
81/2" - 215 mm	2 each

SPECIFICATIONS

Specification	Metric	Imperial
DRY Investment Capacity:	up to 25kg	up to 55LBS
Max. Flask Height:	304 mm	12"
Flask chamber dia	530 mm	20 7/8"
Vacuum. Requirement:	58 m3 / hr 28.5" Hg	40 CFM, 28.5 Hg
Dimensions:	106.7 x 71.2 x 157.5 cm	42" x 28" x 62"
Net/ Gross weight:	410 / 485 kgs	904 / 1070 LBS

SPECIALS - we also build machines to suit individual customer requirements, for example: 

VACUVEST #60

Designed to mix and pour up to a maximum of 60KGs (or 132 LBS) capacity of DRY investment powder in one cycle. 

FLASK CAPACITY

Max flask size

For large flasks up to 20" diameter with flange x 19" tall  or maximum of eight 4" flanged x19 " tall

Specification	Metric	Imperial
DRY Investment Capacity:	up to 60kg	up to 132LBS
Max. Flask Height:	481 mm	19"
Flask chamber dia	530 mm	20 7/8"
Vacuum. Requirement:	70 m3 / hr 28.5" Hg	50 CFM, 28.5 Hg
Dimensions:	106.7 x 71.2 x 170.2 cm	42" x 28" x 67"
Net/ Gross weight:	430 / 500 kgs	946 / 1100 LBS

Please down load the following adobe file, VAC-U-VEST leaflet, which shows the Vac-U-Vest leaflet.

ENQUIRIES:

Please complete our on line enquiry form:

You are welcome to e-mail us on chris@hewitt-impex.co.uk and we will be pleased to pass on your enquiry to our nearest distributor.