Freederick Crowther & Son Ltd
Conveyors and Filtration Systems for Machine Tool, Aerospace and Rail Industries
Design, Manufacturing & Service Solutions
www.cromar.co.uk
Design, Manufacturing & Service Solutions
Design, Manufacturing & Service Solutions
Contents
Cromar
Production Process
Introduction
Cromar is one of Europe’s leaders in the design and manufacture of swarf conveyors, steel telescopic covers, high pressure coolant systems and filtration units. Cromar is the trade name of Frederick Crowther & Son Ltd, and the company, based in Halifax, West Yorkshire, UK, has been a centre of manufacturing excellence since the 1950’s.
Initial Contact & Procedure
Conveyors and Filtration Systems for Machine Tool, Aerospace and Rail Industries
03 03 03 03
Cromar Initial Contact & Procedure Design Facilities Health & Safety Certification
Product Range 04 Steel Hinged Slat Type Conveyor 05 Scraper Type Conveyor 06 Series II Conveyor 08 Series IlI Conveyor 10 Magnetic Swarf Conveyor 11 Gravity Bandfilter Unit (Clarifier) 12 High Pressure Coolant System 13 Shredders 14 Tipping Skips
Complementing the Halifax facility, the Coldstreambased subsidiary, Cromar Metal Products Ltd (Scotland), has established itself as one of the most versatile service suppliers for the repair, refurbishment, and replacement of swarf conveyors and steel telescopic covers.
Initial site visits are carried out by Cromar’s experienced technical department to view customer applications and provide information for the preparation of specifications, quotations and delivery lead times. Orders are then processed through a sophisticated computerised system, enabling technical information to be passed directly to the drawing office for evaluation and preparation. Prior to fabrication, drawing office information is sent to the company’s on-line manufacturing facilities. On completion of manufacture and inspection procedures, fabrications are sent for painting/powder coating and assembly, prior to the forwarding to despatch. Design Facilities
Services
Cromar offers a full design service, which smooths the path from initial site survey right through to the finished manufactured assembly. The company uses sophisticated design software systems such as AutoCAD, Radraft Design and Radpunch NC Programming, linked to production CNC machinery and networked to the company’s computer system.
15 Repairs & Refurbishment
Health & Safety Certification: On-site Installation Installations are carried out by Cromar’s team of skilled engineers, all of whom are in possession of current Health & Safety Passports and CS003 ‘Confined Space Entry’ certification, which includes self rescue procedure for underground installations such as pit areas, wheel lathe applications, and the aerospace/ automotive industries. Cromar can provide installation method statements, where applicable, to suit customer specifications.
www.cromar.co.uk
02 Contents
03 Cromar / Production Process
Cromar Product Range
Cromar Product Range
Standard Swarf Conveyors
Standard Swarf Conveyors
Steel Hinged Slat Type Conveyor
Scraper Type Conveyor
Application
Controls
Application
Controls
Cromar steel belt, slat band conveyors are suitable for steel, ‘bushy’ swarf, cast iron, brass and aluminium, etc. Free standing or machine mounted for CNC lathes, machining centres, gantry type milling machines and floor borers (where conveyors can either be mounted at floor height or incorporated into the foundations of the machine i.e. underground systems).
Supplied with Stop/Start/Reverse push button control with flying lead.
Cromar steel belt, scraper type conveyors are suitable for steel, ‘bushy’ swarf, cast iron, brass finings and aluminium, etc. Free standing or machine mounted for CNC lathes, machining centres, gantry type milling machines and floor borers (where conveyors can either be mounted at floor height or incorporated into the foundations of the machine i.e. underground systems.
Supplied with Stop/Start/Reverse push button control with flying lead.
Construction
Productivity Enhancements
Construction
Productivity Enhancements
Of robust construction to provide many years of trouble-free operation, they are manufactured from the highest quality, cold reduced steel. Specifications include: heavy duty conveyor belts suitable for ‘24/7’ usage, powder coated finish to customer requirements to give hard-wearing finish and easy maintenance.
A range of productivity enhancements are available including integrated coolant tank, conveyor coolant pumps, machine control interface and double strength conveyor belts for bar feed applications.
The conveyor incorporates hinged steel slats, built-up to form an endless belt complete with cross flights which are welded at intervals on the completed belt to assist material conveyance to final discharge point. The conveyor belt is encased within a fully welded, mild steel fabrication. Specifications include: heavy duty belts suitable for ‘24/7’ usage; powder coated finish to customer requirements to give hard-wearing finish and easy maintenance.
A range of productivity enhancements are available including integrated coolant tank, conveyor coolant pumps, perforated steel belts where high volumes of coolant are involved, machine control interface and double strength conveyor belts for bar feed applications.
Paint Supplied finish specification.
painted
to
customer’s
colour
Paint Supplied finish specification.
painted
to
customer’s
colour
Scraper Type Conveyor
Steel Hinged Slat Type Conveyor
01 01 Swarf Conveyor Control Unit
04 Standard Swarf Conveyors
05 Standard Swarf Conveyors
Cromar Product Range
Integrated Swarf Management & Filtration Systems Series II Swarf Conveyor Application
Controls
Series II conveyors are free standing units providing a totally integrated solution for both swarf management and coolant filtration. They are suitable for fine swarf, and short chips of aluminium, brass, steel, and cast iron - and applications including machining centres, lathes and special purpose machines.
Klockner Moeller switch incorporating Forward/Jog/ Reverse/Emergency Stop. The switches interface with the machine tool control and can either be operated independently or by the machine, to suit customer requirements. Standard specification is with the machine tool operating the conveyor.
Principle of Operation
Productivity Enhancements
The Series II unit is of rugged, modular construction with standard, self cleaning filtration systems of 200 microns allowing coolant throughput of 300 L/min.
A range of productivity enhancements are available including machine coolant pumps, high pressure coolant system, improved filtration levels, additional coolant tanks (utlising existing pumps if required), oil skimmer, coolant chiller unit, spray/wash gun, cover wash down, and, mist and fume extraction units.
When in operation, heavy metal chips settle to the bottom of the conveyor and move up the conveyor incline to be deposited into a suitable receptacle. Contaminated coolant is filtered through a continuously rotating drum, which itself incorporates a removable, stainless steel filter medium.
350.0 CASE
1272.5
To ensure the filter medium maintains a consistent level of filtration and coolant throughput, the drum incorporates an internal backwash system that continually blasts coolant from within the drum as it rotates. Once the coolant is filtered, it is either recirculated back into the system or pumped/transferred into an independent high pressure coolant system. The filter is self cleaning and requires minimal maintenance.
260.5
Series ll Swarf Conveyor
240.0
182.5
HOLE
HOLE
10.0
HOLE
1045.0
20.0
277.5
275.0
30.0
315.0
315.0
315.0
315.0
30.0
235.0
1070.0
525.0
600.0
450.0
1035.0
275.0
605.0
410.0
275.0
500.0
490.0
945.0
997.5
185.0
16 0.0
pc d
14
2.0
2145.0 TANK LENGTH 2975.0 O/A LENGTH
Typical example of outline of Series ll Conveyor. All conveyors are bespoke manufactured to suit customer application.
Typical example of outline of Series ll Conveyor. All conveyors are bespoke manufactured to suit customer application.
06 Integrated Swarf Management & Filtration Systems
07 Integrated Swarf Management & Filtration Systems
4-
85 WHEELS
Cromar Product Range
01
Integrated Swarf Management & Filtration Systems Series IlI Swarf Conveyor Application
Similar to the Series II conveyor, contaminated coolant is filtered through a continuously rotating drum, which itself incorporates a removable, stainless steel filter. To ensure the filter medium maintains a consistent level of filtration and coolant throughput, the drum incorporates an internal backwash system that continually blasts coolant from within the drum as it rotates. Once the coolant is filtered, it is either recirculated back into the system or pumped/transferred into an independent high pressure coolant system.
Though offering the same productivity benefits as Series II conveyors, Series III conveyors are essentially two conveyors in one. Free standing units, they are a totally integrated solution for both swarf management and coolant filtration, suitable for fine swarf, and both short and long chips of aluminium, brass, steel, and cast iron. Applications include machining centres, lathes and special purpose machines. Principle of Operation
02
The filter is self cleaning and requires minimal maintenance.
The Series III unit is of rugged, modular construction with standard, self cleaning filtration systems of 200 microns. It incorporates a heavy duty 38mm (1.5in) pitch, steel hinged, slat type belt; and a 38mm (1.5in) scraper type belt, within the same conveyor casing.
Controls Two Klockner Moeller switches incorporating Forward/ Jog/Reverse/Emergency Stop. The switches interface with the machine tool control and can either be operated independently or by the machine, to suit customer requirements. Standard specification is with the machine tool operating the conveyor.
Generally, the belt type conveyor handles a large percentage of the swarf, however, should small chipped swarf or particles be present, they will pass through the belt conveyor and be deposited on the base of the unit, where the scraper type conveyor will remove them.
Productivity Enhancements A range of productivity enhancements are available including machine coolant pumps, high pressure coolant system, improved filtration levels, additional coolant tanks (utlising existing pumps if required), oil skimmer, coolant chiller unit, spray/wash gun, cover wash down, and, mist and fume extraction units.
01 02
Series lll Swarf Conveyor
Series lll Swarf Conveyor Belt close up Series lll Swarf Conveyor Control Unit
1165.0
S
PROVISION FOR CRK2-180 CUSTOMER SUPPLY
PROVISION FOR CHK2-60/6 CUSTOMER SUPPLY
L/
PROVISION FOR TRANSFER PUMP CUSTOMER SUPPLY
597.5
BACKWASH PUMP
1195.0
SWITCH PANEL
300.0
387.0
S2469.01A
750.0
2"SOCKET
ACCESS PANEL D2469.01A
50.0
S2469.02A
80.0 17
0.0
535.0
3210.0
250.0 3460.0
15.0
2025.0 47.0
250.0
210.0
370.0
170.0
593.0
595.5
1049.0
566.5 1970.0
250.0 3460.0
Typical example of outline of Series lll Conveyor. All conveyors are bespoke manufactured to suit customer application.
Typical example of outline of Series lll Conveyor. All conveyors are bespoke manufactured to suit customer application.
08 Integrated Swarf Management & Filtration Systems
09 Integrated Swarf Management & Filtration Systems
438.0 CASE WIDTH
47.0
3/4"SOCKET
227.0
Cromar Product Range
Cromar Product Range
Magnetic Swarf Conveyor
Gravity Bandfilter Unit (Clarifier)
Application
Controls
Application
Principle of Operation
Cromar magnetic swarf conveyors are suitable for CNC lathes and machining centre applications - ideal for the management of small ferrous materials in all general machining applications.
Basic controls include: Stop/Start/Reverse push button box incorporating flying lead and plug to accommodate the electrical socket within the machine tool, or any other electrical specification designated by customer.
Principle of Operation
Paint
Cromar clarifiers remove any type of solid particle contamination from water-based coolants and light viscosity liquids. Applications include: grinding machines, honing machines, lathes, machining centres, drilling & boring machines, spark erosion machines, hardening machines, cold rolling mills and washing equipment.
Contaminated coolant is fed onto a continuous reel of filter fabric. The fabric is carried by a special wire belt, which permits a continuous flow of clean coolant through into the coolant storage tank below. Increasing deposits of contamination on the filter fabric gradually cause the media to go ‘cloudy’, resulting in an increased in the depth of liquid in the trough.
The conveyors incorporate sequential running magnets attached to hollow bearing roller chain, driven by an externally mounted motor assembly. Swarf is moved along a stainless steel skin, which protects and seals the magnets against coolant and oil contamination. When the magnets approach the swarf discharge point, they move away from the stainless steel skin, thus decreasing their influence on the swarf, allowing it to drop into the collection receptacle.
Supplied finish painted to suit customer’s colour specification.
Benefits
This increase in level actuates an adjustable float switch, which in turn operates the reel drive motor, to convey clean filter fabric into the filtration area. In this way the renewal of the filter fabric is achieved automatically in direct relationship to the flow rate and degree of contamination. The used filter fabric, including deposits of contamination, is carried away into a receptacle positioned adjacent to the unit and can be removed for emptying without interrupting the filtration process.
Productivity Enhancements A range of productivity enhancements are available including integrated coolant tank, coolant pumps and machine control interface, as well as any special requirements requested by the customer.
They create a number of key productivity advantages such as improved surface finish of components; minimum service costs; highly efficiency - thus longer service life of coolant and lower tooling costs; and rapid payback.
Magnet Specification Magnets are manufactured from strontium ferrite ceramic material magnetised to saturation remanence (3700). They are capable of the continuous handling of ferrous materials within general machining applications under normal operating conditions.
Filter Fabric Specification
01 01 Gravity Bandfilter Paper Feed
Gravity Bandfilter Unit
Magnetic Type Conveyor
10 Magnetic Swarf Conveyor
11 Gravity Bandfilter Unit (Clarifier)
Widths available: 480mm (18.9in), 710mm (28in) and 1040mm (40.9in). Grades available: 60 microns down to 15 microns
Cromar Product Range
Cromar Product Range
High Pressure Coolant System
Shredders
Application
Construction / Specification
The Cromar high pressure coolant system offers a wide range of production benefits for a relatively small capital outlay. Applications that particularly benefit from high pressure cooling include: drilling, boring and tapping; heavy cutting; small tooling processes; achieving fine surface finishes; pocket machining; chip control; exotic materials; parting off; and grooving.
Stand alone or fully integrated module incorporating IFM electronic float switch with no moving parts; Knoll KTS25-60 pump; fixed or variable pressure from 0-70 bar at 25 litres per min, control by machine ‘M’ codes via programmable valve; 10 micron filtration via duplex filter unit and super clean tanks for increased capacity.
Benefits Using high pressure, coolant can be accurately and effectively directed at the target machining process, dramatically reducing temperatures as it penetrates deep into the cutting zone.
Cromar are exclusive agents for Ulster Shredders and Swarf Management Applications Ulster shredders are constructed using powerful 7.5kW drives to enable the machine to perform heavy duty operations on a continuous basis. Typical materials include: paper and cardboard; confidential documents; cans and light metal containers; glass; plastic and wood. In-house design and manufacturing facilities have been successfully utilised in adapting the machine to suit a wide range of applications including: food and pharmaceuticals industries; marine waste management systems; integrated automatic animal bedding systems and tobacco processing systems. Shredder
Metal chips are forcibly removed from the cutting area, decreasing heat and friction that are detrimental to machine performance, while improved lubrication and a cleaner working environment allow machinery to be worked harder and faster. Tool life is also prolonged, workpiece integrity (surface finish and accuracy) maintained, coolant conserved and metal chips are smaller and more manageable. High Pressure Coolant System
12 High Pressure Coolant System
13 Shredders
Cromar Product Range
Cromar Services
Tipping Skips
Repair, Refurbishment & Service
The Cromar range of tipping skips is supplied to suit a wide range of applications including swarf waste and building materials etc, and ideal for charging waste compactors, skip loading and finished products. The skips are of heavy duty construction to endure the roughest treatment and incorporate a tubular base frame and fork pockets (for fork lift truck loading). Supplied with coolant drain plug or tap and heavy duty lockable castors. Standard colour: charcoal black with textured finish.
Geographically well positioned, Cromar Metal Products (Scotland) is one of the most versatile service suppliers in the UK for the repair, refurbishment, and replacement of steel telescopic covers and swarf conveyors; serving, in particular, the requirements of the machine tool industry, aerospace, rail and automotive industries. The company actively works with many of the World and European leaders in machine tool technology, and has carried out refurbishments for some of the leading manufacturing facilities in both the UK and Europe.
Complementing its refurbishment operations, Cromar Metal Products is also expert at machine tool on-site removal, re-installation, craneage and transport. Quotations can be provided ‘same day’ and the company is able to offer specialist sheet metal solutions - i.e. lathe trays, and perimeter guarding to meet CE/ Health & Safety legislation.
01 01 Unit On-site
Tipping Skips
www.cromar.co.uk
14 Tipping Skips
15 Repair, Refurbishment & Service
Freedrick Crowther & Son Ltd Unit 48 High Level Way Halifax HX3 5AG Tel: 01422 367 788 Fax: 01422 368 802 E-mail: sales@cromar.co.uk www.cromar.co.uk