Fruit double-stage pulping machine

Overview

The double-stage fruit pulper is suitable for separating pulp and pulp from pome fruits and various berries after crushing and pre-cooking. The first stage is for coarse pulping, and the second stage is for fine pulping. The mesh size of the two screens can be selected according to the material requirements.

Applications and Features

Dual Channel Pulping Machine is suitable for pulping and separating crushed tomatoes, kiwis, strawberries, apples, pears, and pre-cooked and softened fruits such as hawthorns and dates.

Working Principle:

1. DJ-type pulper: The motor drives the scraper mounted on the spline shaft at high speed via belt drive. When the crushed fruit enters the machine through the feed inlet, the receiving tray evenly distributes the material to the scraper and screen. Due to the rotational action and lead angle of the scraper, the material moves along the cylinder towards the outlet in a spiral pattern. During this movement between the scraper and the screen cylinder, the material is crushed by centrifugal force. Juice and pulp (now in a pulpy state) pass through the screen holes and are fed to the next process (double-stage and triple-stage pulpers repeat this process in a linked manner). Skin and seeds are discharged from the slag hopper, achieving automatic separation. By changing the screen size and adjusting the scraper lead angle, different pulping speeds can be achieved to obtain satisfactory results.
2. MDJ Type Pulping Machine: The motor drives the rotor mounted on the splined shaft at high speed via belt drive. Fruit enters the machine through the feed inlet, and the feeding blades spirally convey the material to the pulping rods. Under the action of the pulping rods, the material is crushed. Due to centrifugal force, the juice and pulp (already in a pulpy state) in the material pass through the sieve holes (the sieve size depends on the size of the fruit pit) into the next pulping stage. The pit is discharged from the slag outlet by the slag discharge blades, thus achieving automatic pulp-slag separation.

This machine is available in single-stage and double-stage models. When used for pulping stone fruits (such as mangoes), if a single-stage pitting pulper is selected, the peel and pulp flow from the discharge hopper into the buffer tank, while the pit is discharged from the slag outlet. The double-stage pitting pulper automatically separates the pit, peel, and slag in the second stage after pitting in the first stage. Users are recommended to choose the double-stage pitting pulper. The pulping principle is similar to the DJ-type pulper.

Operation and Precautions

1. The machine must be installed horizontally and secured with anchor bolts.
2. Tighten all bolts on the machine and check that all screws inside the shaft are not loose. Clean the entire machine inside and out to keep it clean.
3. Connect the drive motor power supply and confirm that the machine’s rotation direction matches the direction indicator.
4. Run the machine for 5 minutes to confirm it is functioning normally before feeding material.
5. Add material evenly, avoiding impact. Depending on the slag and slurry output, adjust the scraper’s spiral angle and the gap between the scraper and the screen after stopping the machine to achieve the required juice content in the slag. Scraper spiral angle adjustment: Adjust the scraper’s inclination by adjusting the bolts on the front and rear shafts; Scraper-screen gap adjustment: Adjust the distance between the pulping plate and the screen by adjusting the nuts on the shafts.
6. To stop the machine, simply disconnect the motor power supply. Do not open the front cover while the rotor is still rotating. Turn the handwheel counterclockwise to open the front cover.
7. After each shift, wash the filter screen with water and a brush. To clean, open the front cover, unscrew the tension screw at one end of the spline, and the rotor assembly can be easily removed; the screen can then be taken out directly.
8. Regularly check whether the motor is overloaded and overheating, and whether the bearings are lubricated.