Powder Packaging Machine Introduction

In 1983, in order to organize the National Packaging and Food Machinery Information Symposium, it was discovered throughout the country that few decent powder packaging machines were manufactured at that time. Until 1987, the National Gold Award for Outstanding Science and Technology Entrepreneur Zhang Daoxuan, General Manager of Cuizhu Group, Guangzhou Military Region was awarded. Comrade hoped that I would engage in a powder packaging machine. He said: “I have a US dollar and importing a few packaging machines is not an economic problem. However, there are so many Chinese farmers. Fully automatic may not be suitable for the national conditions. I hope to engage in an imported machine. "Improved precision, semi-automatic powder packaging machine suitable for China's national conditions." Since then, I have embarked on the arduous pioneering road of developing BFB and ZFB series powder packaging machines. After nearly ten years of research and practice, I have developed the first to the fifth generation. Series of patented products.
1. Principle and Accuracy of Powder Packing Machine (1) The powder packing machine adopts the screw volume measurement method, which is characterized by:
1 Based on the special motor as the main power source, computerized control and impulse circuit mechatronics design;
2 Built-in powder filling agitator - The purpose is to make the powder and granular materials compactly fill the volume, so as to ensure the consistency of each discharge, in order to ensure the measurement accuracy;
3 Metering screw - according to different specific gravity, particle size, viscosity, fluidity, water absorption and measurement range and measurement accuracy requirements, specially designed measuring screw of different specifications to meet the needs of various users, it requires the manufacture of accurate, light weight , high surface finish, ensure fill factor to ensure measurement accuracy;
4 Dosing guide sleeve - corresponding to different materials designed different screw and guide sleeve gap, so that the screw per rotation of the same weight of material extrusion, scrape excess powder, so as to ensure the highest accuracy under normal operating conditions.
(B) Accuracy Assurance 1 Weight Formula Weight = Material Specific Gravity x Screw Rotation per Revolution x Screw Rotation Speed ​​2 Factors Affecting Metering Accuracy I. Specific gravity Due to powder, particulate materials are compressible materials and therefore have no constant value. As regards specific gravity, the influencing factors are:
a. Powder size, uniformity;
b. The percentage change in the composition of each element in the mixture;
c. The size of the powder absorbent;
d. Fill density.
II. Filling volume a. The metering volume is guaranteed by the process when the screw is manufactured. Once the measurement accuracy is in error, manual grinding or use of a computer can be used to perform “weight trimming” operations to achieve minor weight corrections.
b. The fluidity of the powder; powder can be divided into two types: free-flow and non-free flow. Attention must be paid to non-free flow. It is often due to poor feeding and incomplete filling. It affects the filling volume (this has been solved when designing non-free flow special screw and special stirrer);
c. The height of the powder material level in the cone hopper; this value should generally be greater than 2/3 of the total height of the cone hopper, and should not fluctuate too much up or down;
d. The height of the powder in the additional storage silo should generally be the same, the height of the floating up and down no more than 20-100mm, which can be controlled by the material level sensor to stop or turn on the feeder to ensure.
III. Screw Rotation Speed ​​n This is guaranteed by the expertise of the patented invention. Rotational Error Screw Rotation per revolution is <1/500. IV. Structure and installation position of the agitator It directly affects whether the feed is smooth, the powder filling factor, and thus the accuracy. This is adjusted at the factory to ensure accuracy.
(C), the measurement accuracy of the total measurement accuracy = specific gravity × filling volume × speed.
Example 1: An additive powder (mixture) apparent weight = 0.99 Filling volume = 0.99, rotation speed = 0.018 Total measurement = 0.99 × 0.99 × 0.998 = 0.978 precision error = -0.178 = 0.0022 = 2.2%.
Example 2: To ensure that the final precision is plus or minus 1%, the specific gravity must be taken as = 0.995. Filling volume = 0.998, and the rotational speed = 0.999, that is, the total amount = 0.995 × 0.998 × 0.999 = 0.990, and the precision error = 1 - 0.99 = 0.1 = positive. Negative 1%. Therefore, the users are reminded to pay attention to: “It must be strictly controlled to ensure that the powder mixture is evenly mixed, the particle size distribution is in line with the standard, and the water content must be strictly controlled”, otherwise the final measurement accuracy requirements cannot be guaranteed.
2, the characteristics of powder packaging machine:
1 High precision and fine adjustment: The accuracy can reach plus or minus 0.2%.
2 Speed ​​adjustment: Adjustable from 10 bags/minute to 60 bags/minute.
3 weight adjustable, can be fine-tuned: computer control, weight from 0.3g to 1kg / bag, 500g to 50kg / bag, any adjustment.
4 Any change of material: It can contain 1300 mesh fine powder or 10mm coarse particles. Such as milk powder, monosodium glutamate, iodized salt, veterinary drugs, feed, additives, pesticides, natural pigments, ultra-fine fire extinguishing powder, miscellaneous grains, pearl powder, phosphors and so on.
5 Protect the environment and the health of workers.
6 Poor bag-breaking rate: The bag-breaking rate is below 3%.
7 One machine for multiple use, one for the top one.
Head replacement, a wide range of package weights.
3, powder packaging machine to overcome the technical difficulties:
1 Solved dry powder packaging with a particle size of over 1,300 mesh.
2 Sugar 3% soy milk powder filling.
3 Iodized salt packaging machine was successfully developed.
4 Antistatic device.
5 Automatic material level device can prevent powder overflow and material level from affecting accuracy.