FOOD ENGINEERING

Lesson 39. EQUIPMENT FOR PULPING

Module 5. Food processing equipments and unit operations

Lesson 39

EQUIPMENT FOR PULPING

39.1 Introduction

Fruits and vegetable processing is done in a different manners as per the requirement of the type of processed end products, in some processing pulping is the major unit operation for making processed product. There are different methods of pulping of fruits and vegetables, depending on its size shape and texture. Commercial production of processed product from fruits and vegetables requires different types of pulping machines, for increased capacity as well as hygienic production of the processed foods.

39.2 Equipment for Pulping

Pulping is process that performed by the extraction or pulper equipment which crush the food products and separate the pulp, seed and skin of fruits and vegetable. Pulper may be either mechanicaly or electrical operated to forces the feed in the machine.

39.2.1 Fruit crusher

Powered machines that are used to crush pineapples or other hard fruits consist of a rotating screw inside a casing. The casing has a screen in the base. Juice/pulp drains from an outlet in the base of the casing and skin is ejected from the end of the casing down a chute. The casing should be fitted with wing nuts to remove it easily.

In operation, pineapples are cut into large pieces and fed into the hopper. Routine maintenance consists of: weekly checks on the belt tension weekly checks of electrical connections monthly greasingof bearings. A spare drive belt and fuse should be kept.

39.2.2 Fruit presses

Manual fruit presses have a stainless steel cage in which a press plate is raised and lowered by a screw. The screw should be made from a harder grade of steel than the bearing to prevent the more expensive screw from wearing down (the bearing can be replaced more cheaply than the screw). Layer plates made from stainless steel, nylon or painted mild steel may be needed in larger presses to promote efficient pressing. In operation a muslin or cotton bag is placed in the cage and pulp is poured in. The bag is closed and the press plate is lowered. After a few minutes, additional turns of the screw increase the pressure further. Juice is collected via a pipe. The screw is then raised and the bag is removed.

Important innovations are

1. Low water-use pulpers

Pulping systems that accept mixtures of green and ripe cherry and separate the ‘greens’ without crushing

39.2.3 Fruit and Vegetable Pulper

The leading manufacturer of fruit & vegetable pulp based products. These fruit and vegetable pulper are used for the extraction of pulp from vegetables and fruits like mango, litchi, guava, pear, tomato, passion fruit, grape ad so on. The working capacity of these machines depend upon the size, type and quality of the product to be pulped. Our range of fruit & vegetable pulper machines are available from 80 kg/hr to 3 t/hr capacity also are also found in the followng capacities

39.2.4 Twin pulper

A wide range of Fruit and Vegetable Pulper which can be used to extract pulps from fruits and vegetables. These pulpers are highly effective and also high on performance. These Fruit an Vegetable Pulpers are used various purposes like skin removal, destoning, pulping and finishing of pulps from fruits and vegetables like mangoes, litchi, tomatoes, carrot, pineapple and many more. The fruit and vegetable pulper is furnished with parts like scraper rotors, spiral scraper and brushes which rotates at a very high speed thus separating the stone, skin and the pulp. The secondary stage id used for receiving the refined pulp from the primary stage and are available in the wide range of capacity:

39.2.5 Fruit mill

Manufacturer of fruit mill crusher enabled with sturdy fixture mounted on MS steel band. The product is used for crushing hard seedless fruits for pulping or juice extraction. The machine is fed into a hopper which is then crushed by SS rotor against the SS blades driven by a powerful motor. All the parts of the fruit mill crusher are made up of food grade stainless steel.

39.2.6 Motorized hydraulic fruit press

A comprehensive range of Hydraulic Juice Press (Motorised) manufactured with high quality material. The Hydraulic Juice Press (Motorised) is used for the extraction of juice from crushed fruits like pineapple, grapes, orange, apple and so on. The product is also endowed with features like efficient durability and high tensile strength. The motorized Hydraulic Juice Press having stainless steel tray with proper depth which prevents the juice from spilling out from the filter cloth and wooden racks thereby retaining the nutrients left in the pulp from other juices.

39.2.7 Fruit juicer

The product is used for the extraction of juice from peeled fruits and is fabricated with an all sturdy aluminum body with stainless steel strainer. The Hand Operated Fruit Juicer is suitable for continuous operation and is easy to clean and maintain. These machines also easy to use, and do not require any power or electricity as it works on the similar principle of pressing the machine. The product is available in a variety of designs and models .

39.2.8 Stainless steel pulper

These Stainless Steel 304 fruit and vegetable pulper are used for the extraction of pulp from vegetables and fruits like mango, litchi, guava, pear, tomato, passion fruit, grape ad so on. The working capacity of these machines depend upon the size, type and quality of the product to be pulped. Our range of fruit & vegetable pulper machines are available from 500 kg/hr to 3 t/hr capacity also are also found in the different capacities.