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Different Types of Screw Conveyors

2 Different Types of Screw Conveyors

The function of a Screw Conveyor is to push material as the screw rotates in a fixed trough, pipe or housing.

Using rotating helical screw blades (also referred to as flights or augers), screw conveyors appear in almost every industry and transport all types of materials.

They consist of a tube or trough containing a helical screw blade, which transports material according to its rotational direction as driven by conveyor motors.

Conveyors come in many different types, screw diameters, and material-moving capacities per hour. Screw conveyors can provide precise volumetric material-moving control, which makes them appropriate for dosing applications.

Choosing appropriate screw conveyors relies on successful accounting of desired capacity, material particle size, viscosity, flowability, density, abrasiveness, flammability, toxicity, hygienic concerns, and chemical compatibility.

Screw conveyors benefit a wide range of applications, including:

  • Grain transport in agriculture applications
  • Metal chip removal systems
  • Flow control of plastic pellets in injection-molding operations
  • Powder dosing in the pharmaceutical industry
  • Cement mixing
  • Petroleum refining
  • Mining and mineral processing
  • Mixing, blending, and agitating materials or solutions
  • Conveying nonflowing caking materials

Characteristics of Screw Conveyors

Position

Horizontal Screw Conveyors

The most widely used conveyor type, horizontal screw conveyors move material depending on its characteristics at a range of 15–45% trough loading.

Operators use higher feed ranges for lighter, free-flowing materials, whereas lower feed ranges aid with sluggish, more difficult to move, and abrasive materials.

Inclined Screw Conveyors

Typically operating at angles between 0° and 45°, inclined screw conveyors transport and elevate material through different levels of your facility.

However, note that increasing the incline degree increases friction loss, thus reducing conveyor efficiency.

Sizing

Screw Conveyors are specified by:

  • Outside Diameter of Flighting
  • Pitch
  • Inside Diameter of Flighting. This is also the size of the pipe or tube the flights are mounted on.
  • Flight Thickness
  • Material
  • Overall Length
  • The direction of Flighting: Right or Left hand

Material

Screw material types include carbon steel, abrasion resistant steel, and stainless steel. Wear resistance can also be increased by adding hard facing material to the edge or the entire flight.

Type of Screw – With or without a center core

Screw Conveyor

Flights mounted on a pipe or tube. Typically screw does not contact the bottom of the trough. The screw is supported by bearing and hangers

Centerless

Flights are fabricated as a continuous ribbon. Typically centerless ribbon will ride in the bottom of the trough or tube. Often used with chip conveyors and sticky material

Screw Conveyors for All Occasions

Let us help you find the best screw conveyor design for your facility. Reinke & Schomann Inc. has more than 90 years of experience in providing custom metal fabrication services, and we also offer custom spiral screw conveyor design and fabrication for your unique needs.

We’ve implemented our solutions in industries ranging from food and beverage, bulk handling, water treatment, waste treatment processing to heavy industrial machinery.

Request a quote or contact Reinke & Schomann today to discover custom screw conveyor and metal fabrication solutions tailored to your needs and budget.

What Is Metal Fabrication?

What Is Custom Metal Fabrication?

The term “metal fabrication” encompasses the entire process of building machine parts and structural components from raw metal materials. This means that everything from cutting and shaping to final assembly falls under the umbrella of metal fabrication. The various forms of custom metal fabrication are responsible for projects as small as part casting and can scale up to include entire pieces of equipment and machinery.

 

According to the Bureau of Labor Statistics, approximately 1.425 million workers are employed by the metal fabrication industry. Other industries, such as auto, energy, and aerospace, heavily influence research and advances in metal fabrication. For this reason, many machine shops and manufacturers work to create a solid organizational strategy that allows them to make it through highs and lows in the market without worry.

8 Steps in the Custom Metal Fabrication Process

Typical metal fabrication will typically encompass some or all of the following eight steps:

  1.     Cutting

Most metal fabrication processes begin with cutting sheets of metal into smaller sections. The size of these sections will depend largely on the product design and the limitations of any necessary machines.

  1.     Forming

In the folding process, metal surfaces are bent into various shapes. Press brakes and folding machines may be used to accomplish these bends, depending on the requirements of the design.

  1.     Welding

Welding bonds two separate metal parts by melting them and forcing them to join together. This could involve welding together two individual components to create a larger component, or putting large finished pieces together to complete a final design. Sheets, panels, bars, and a variety of other metal parts may be welded together.

  1.     Machining

In machining, a variety of different cutting and shaping tools are used to remove sections from a piece of metal. The metal will usually be rotated against certain tools to cut away pieces of the product until it’s reached its desired shape or size.

  1.     Punching

Punch presses use force to create holes in a piece of metal where other parts can be secured. This process may be used to allow fastening of other parts to a larger object or to create holes in a sheet which is later cut into smaller parts. Based on the design and size of the metal to be punched, this operation can be performed by a small manual punch press or a larger, more complex CNC punch press.

  1.     Shearing

Shearing involves making long cuts in sheets of metal. This technique is often used to trim edges on long metal sheets.

  1.     Stamping

Like punching, stamping uses compressive force against a die to shape a metal sheet, though stamping does not puncture the base material. Metal stamping has broad applications, such as putting branding or lettering onto a metal object, creating a specific design shape. More complex designs may use a series of progressive dies to create incremental changes in the object as it moves through the process.

  1.     Casting

In casting, molten metal gets poured into a mold and is left to solidify into the final design shape. This flexible fabrication process is frequently used to create complex shapes.

4 Common Metals Used in Metal Fabrication

 

  • Pipe & Tube

 

Pipe & Tube are hollow. Pipes are always round in shape. Tubes can be square, rectangular or round.  Pipes are pressure rated and intended to be used for the transference of fluids or gas. Tubes, on the other hand, are used in structural applications.  Available in Carbon Steel, Stainless Steel, Aluminium, and other materials in various grades

 

  • Structural Metals

 

Any prefabricated piece of metal designed for standardized assembly is considered structural metal. This material is a key facet of the construction and engineering sectors, and common examples include bars,  beams, angles, and channels.

 

  • Plate and Sheet Metals

 

Flat metal is a raw material and comes prefabricated in a range of thicknesses, although pieces are often fairly thin. Types of flat metal include leaf metal, sheet metal, and plate metal. Applications vary widely, from construction to home appliances, to military and defense.

 

  • Bar Stock

 

Round, Square, Rectangular Solid Shapes. Available in Carbon Steel, Stainless Steel, Aluminium, and other materials in various grades. Can be machined, bend, rolled and cut to length for various applications

Custom Metal Fabrication Services at Reinke & Schomann

At Reinke & Schomann, we’ve been building our reputation as a quality partner since 1929. Our customers return to us for a project after project because they know that when a job needs doing, we’re the company that’ll do it right.

 

Contact us today to discover more about our custom metal fabrication capabilities and how they can help you succeed with your project.