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Development of a Mobile Spice Grinding Machine for Small Entrepreneurs (2019-2020)

M A Gulandaz
Farm Machinery and Postharvest Process Engineering (FMPE) Division, BARI, Gazipur

M A Hossain
Farm Machinery and Postharvest Process Engineering (FMPE) Division, BARI, Gazipur

M N Amin
Farm Machinery and Postharvest Process Engineering (FMPE) Division, BARI, Gazipur

M Z Hasn
Farm Machinery and Postharvest Process Engineering (FMPE) Division, BARI, Gazipur

Abstract/ Executive Summary:

The major thrust of this experiment is the development of an improved mobile spice grinding machine which will be mostly used in cottage industry for grinding spices and grains of any form. Adulteration in powder spices is a major problem now a days. Most of the people do not trust packet powder spices. But people in urban areas are facing huge problems for grinding spices. In these circumstances, mobile spice grinding will be a perfect way to provide pure spice to urban people and it also flourish the cottage industry and increase employment. The construction of the work is simple and it employs the maximum utilization of locally available materials, which are readily available hence, a reduction in its total cost. This year only design through SOLIDWORK is done. Due to COVID-19 pandemic situation, fabrication is not started yet.

Keywords: Mobile spice grinding machine, Cottage industry, Grinding spices, Grinding grains

Location: Farm Machinery and Postharvest Process Engineering (FMPE) Division, BARI, Gazipur, Bangladesh

Start Date: 00-00-2019

End Date: 00-00-2020

Program Area: Farm Mechanization

Commodity: Grinding machine, Spices

Objectives:

To determine the development of an improved mobile spice grinding machine which will be mostly used in cottage industry for grinding spices and grains of any form.

Methodology:

The mobile grinding machine has major components such as; Feeding Chamber that consist of hopper and feeder which is the point at which the products is loaded into the hopper where coiled spring/feeder will channel the compressed products into the grinding chamber. Grinding chamber consist of grinding discs, adjustable screw and cone which is the point at which the feeded products will be grinded/blend through the two grinding discs rubbing together during the operation. The transmission chamber that is consists of lever, shaft and control lever bearing which is the point at which the hand driver lever will transmit the motion through the shaft to the grinding discs where the work will be done. Also the adjustable lever at the opposite side of the driver lever is used to increase the effect of the grinding discs in the chamber. The extractor chamber that consist of compacted magnetic substance in an enclosed sheet ferrous metal rectangular plate mounted at the exit point of the chamber with an angle approximately 450 which will allow free flow of grinded product but trap the ferrous metallic substance. The hopper is mounted in such a way that the products have free flow into the grinding chamber in a control manner. As the lever rotate, it pushes the product into the grinding section and as the two discs rubbing each other the product is grinded into powder. As the powder trying to drop the ferrous metallic particles were trapped at the exit point of the machine through the help of the extractor and the grinded powder product without ferrous metallic particles dropped in a container.

Design analysis:

Mass of the hopper = Density of mild steel X volume of hopper.

M = ρ x V

Volume of hopper = External volume of the hopper – Internal volume of the hopper

(Dauda, and Okechukwu, 2013)

Capacity of the Feeding Chamber V = πr2h

Where:

V = volume (cm3), r = radius (m) and h = height (m)

Material selection:

The particular conditions under which the various parts of the Domestic grinding machine are subjected to, makes it necessary to select adequate materials for the fabrication based on functionality, durability, ability to withstand vibration and the cost of such materials. In the choice of material, their physical properties and behaviour are considered such that when subjected to the machine running condition should be able to withstand the service condition. In this design, the strength of the materials, serviceability of parts and availability were put into consideration. This led to the selection of mild steel rod for the shaft, mild steel plate of gauges 24 for the body including the hopper, the grinding chamber and the feeding chamber. Cast iron was selected for the grinding discs. Magnetic substances were selected for the extractor. Also painting of the machine was carried out for aesthetic aspect and to prevent rusting of parts.

Source of Information: Annual Research Report 2019-2020, Farm Machinery and Postharvest Process Engineering (FMPE) Division, BARI, Gazipur

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Mobile spice grinding machine will be a perfect way to provide pure spice to urban people and it also flourish the cottage industry and increase employment. The designed mobile spice grinding machine is surely helpful to grind the spices and grains effectively. The design of the mobile spice grinding machine was greatly depend on the inlet portion, grinding bar and the grinding capacity. This is first year experiment. The experiment will be continued next year for fabrication and field trial.

Knowledge Management: Report/Proceedings