PVC Mixer

Select the pvc mixer based on the daily production volume. Due to the mixing machine’s processing time of about 10 minutes for each batch of materials, plus the time for discharging and feeding, the processing time for each batch of materials can be calculated as 15 minutes, which allows for continuous processing of 4 batches of materials in 1 hour. If a mixer with a processing capacity of 100 kilograms per batch is selected, it can process 400 kilograms per hour. Users can choose a horizontal mixer according to their own needs.

According to the working principle of a pvc mixer, the ability of the double spiral belt used for mixing to push materials in the opposite direction should be basically consistent. Due to the fact that the pitch of the inner spiral belt should be smaller than that of the outer spiral belt, in order to achieve consistent material pushing ability, the pitch of the inner spiral belt should be smaller than that of the outer spiral belt, and the width should be larger than that of the outer spiral belt, otherwise it will cause the material to concentrate in one direction. Therefore, it is important to pay attention to this when selecting a pvc mixer.

According to the design principle, the gap between the spiral belt and the shell in the pvc mixer can be between 4mm and 10mm, and the materials can be driven by friction to participate in the mixing process. However, due to differences in particle size and friction coefficient of materials, the mixing time of various components of materials may vary, resulting in non-uniformity of the product. At present, some manufacturers have realized this and made improvements to their products. One is to pay attention to machining accuracy, reducing the bottom clearance to about 3mm; another method is to make the position between the main shaft and the housing adjustable, and adjust the gap between the spiral belt and the housing frequently according to the wear amount. When choosing a pvc mixer, these two forms of product should be the best choice.

When selecting a pvc mixer, pay attention to the discharge method. Timely communication should be made with suppliers to choose the valve form that is suitable for their own process, and do not choose the side outlet discharge form. The reason is that when the pvc mixer completes the mixing process within the specified time, it can ensure the uniformity of the material by releasing it in one go as soon as possible; if the side spiral belt is used to gradually discharge the material, it will delay the time and fail to achieve the expected production rate. Secondly, if the material has already reached the optimal uniformity, excessive mixing will actually cause the material to separate and damage the uniformity, thus losing the significance of using a horizontal mixer.

When using a pvc mixer, pay attention to the order of feeding. Generally, large materials, such as corn meal, soybean meal, etc., are put in first, and then group materials, such as premix, are put in. Note that the pre mixed material must not be fed by a spiral elevator, but should be fed by a one-time tilting bucket or manually to avoid the segregation and loss of effective ingredients in the pre mixed material.

When using a pvc mixer, batch feeding should be carried out after the mixer is started. Do not stop the machine at the end of mixing and discharge, and mix another batch after the material is discharged. If restarted after full load, it will cause the power distance to be too large and burn out the motor.

Keep all parts of the machine clean, especially the mixing container and discharge valve. The inner chamber should be cleaned to ensure that there are no hard objects or dirt.

Conduct a detailed inspection to ensure that all connecting components of the machine are not loose, the connection of the heating and compressed air pipeline is tight without leakage, and all instrument indications are normal.

Check whether each component has defects such as scratches and sticking, and lubricate each part strictly according to the lubrication regulations.

Check whether the opening and closing actions of the discharge valve are flexible and free from blockage.

Check if the mixing paddle is firmly installed, there is no grinding phenomenon between the scraper and the bottom of the pot, and a certain gap is maintained. When manually turning, the spindle should rotate lightly and flexibly.

Check whether the electrical equipment is safe and reliable.

Always pay attention that the indicated value of the ammeter does not exceed the rated value. If the indicated value of the ammeter increases sharply, stop the machine immediately, find out the cause, and continue production after troubleshooting.

Pay attention to whether the motor operates stably, without abnormal noise, and whether the temperature rise is normal.

When replacing resin or pigment, the discharge valve and discharge cylinder wall of the mixing container must be cleaned thoroughly.

The mixed material in the mixing container must be cleaned before the discharge valve can be closed to prevent the material from getting stuck in front of the valve and causing leakage.

Pay attention to check whether the main shaft bearing, belt and other transmission parts are normal. In case of abnormal sound and vibration, stop rotating immediately, and replace and repair the damaged parts in time.

Before starting the machine, it is not allowed to feed to reduce the overshoot resistance. During the operation of the machine, the plasticizer should be slowly added and should not be suddenly poured into the machine to avoid local material agglomeration and sudden increase in load.

Startup sequence: Close the discharge valve – feed – close the pot cover – start at low speed – start at high speed – mix according to process requirements – temperature – discharge

Be careful not to switch from high speed to low speed.