Traditional mold cleaning technology vs dry ice blast cleaning technology

Dry ice blast cleaning technology is well-suited for Toyota-type lean production scales because it reduces the time and money extravagance during production. Dry ice blast cleaning of molds is much more efficient than letting workers perform manual cleaning for 4-8 hours each time. In addition, the repeated movements of this manual cleaning mold can easily cause carpal tunnel problems to workers.

Dry ice blast cleaning technology protects workers from cleaning agents and eliminates the hassle of disposing of used contaminated cleaning agents. This makes dry ice blast cleaning technology a very green mold cleaning method, this process has been approved by the (US) Environmental Protection Agency and (US) Food and Drug Administration.

Just as dry ice blast cleaning technology can be used to clean machinery or other contaminated surfaces, this technology can also be used to clean industrial molds. When the dry ice particles hit the surface of the hot object, they will elevate into the gas, and there will be no residue in the entire cleaning process. Dry ice is a by-product of other industrial processes. Because it is made from recycled CO2, it will not generate CO2 again or increase the amount of CO2 in the atmosphere, so it will not exacerbate the greenhouse effect.

Manipulation rules

The following is the flow of the entire operation process and how this technology is applied to various production processes. First, dry ice is made by pressurizing liquid CO2 and then releasing it to normal atmospheric pressure. This converts liquid CO2 into a gas and a solid snow. This snow is compressed into a block or granular object. The equipment for producing dry ice requires a liquid CO2 container and a pelletizer or block.

Carbon dioxide is a colorless gas that is a by-product of breathing. Its density at 25 degrees Celsius is 1.98 kilograms per cubic meter-about 1.65 times the density of air. This means that CO2 gas can replace oxygen (CO2 gas sinks, oxygen rises).

This characteristic of carbon dioxide is very important, so it should be used and stored in a place with good ventilation (whether solid or liquid CO2). Moreover, the liquid CO2 needs to be stored in a sealed and pressurized container, so that it can prevent its state from changing. Because CO2 is a product of complete oxidation, it is not easy to produce chemical reactions, especially it is not easy to burn.

When the temperature is below -78 degrees Celsius, carbon dioxide will directly change from a gaseous state to a white solid called dry ice through desublimation. Carbon dioxide will only liquefy when the pressure reaches 5.1 atmospheres or more; under normal atmospheric pressure, it will directly convert from solid to gaseous through a sublimation process.

The equipment used in dry ice blast cleaning technology can store block dry ice and granular dry ice. Block dry ice machines are used for cleaning processes with lower power requirements. At this time, the pressure is only 50 psi; granular dry ice blasting machines with pressures from 120 psi to 300 psi are used for higher power cleaning processes. The application of dry ice can be said to be unlimited. When cleaning the mold, you don't have to wait for the mold to cool before cleaning. In most cases, it can be cleaned without disassembling the equipment.

The dry ice blast cleaning process should include high speed (supersonic) nozzles for surface treatment and paint removal. Since the kinetic energy impact force is a common product of dry ice particle mass, speed, and action time, the jet system can obtain the maximum impact force only by ejecting solid CO2 particles at the maximum speed in the sandblasting process. Particles can reach speeds of 900 feet per second.

Even with high-speed impact and right-angle impact, compared with other media (steel sand, gravel, PMB), the impact of solid CO2 particles is minimal. This is due to the relative softness of the solid CO2 particles which makes them unable to reach the density and hardness of other impactors.

Also, the particles transform from solid to gaseous state almost immediately at the moment of impact, which makes the recovery coefficient in the shock equation almost zero. This advantage is that almost no impact can be transmitted to the coating or substrate, so the entire spraying process is thought to not cause wear on the mold.

Dry ice blast cleaning technology is very effective. This is because the temperature of the particles is extremely low, and the particles rise from the solid state to the gas state immediately after the impact, which brings thermal shock. These ultra-cold particles at 110 degrees Fahrenheit quickly absorb heat from the contaminated surface, which creates a huge temperature difference between the continuous and trace thin layers of the coating.

This huge gradient of heat produces local high shear stresses between trace thin layers. The generation of shear stress also depends on the thermal conductivity of the coating and its coefficient of thermal expansion and contraction, as well as the thermal mass of the substrate.

The high shear stress generated in a very short time can cause the rapid increase of fine cracks between the layers. This reaction thus results in the decomposition of contaminant ions or the coating on the surface of the substrate.

These thermal and kinetic energy effects of dry ice particles can basically break the combination of surface contaminants, causing them to fall off the mold. Energy dissipation impact and rapid heat transfer between the dry ice particles and the mold surface caused the solid CO2 to rapidly rise to the gaseous state. During this process, the volume of the particles expanded by nearly 800 times within milliseconds, and microbursts were effectively generated at the point of impact.

Because these dry ice particles have no rebound force, these microbursts further detach the coating particles that have been separated from the substrate due to temperature differences. The CO2 gas expands outward along the surface, and the resulting explosion impact is concentrated between the surface of the mold and the particles that are cracked due to the temperature difference, which effectively creates a high-pressure region. The resulting effective lifting force can remove these particles from the mold surface.

Application of dry ice spray cleaning technology in mold cleaning

Dry ice spray cleaning of molds is fast and there will be no residue after the dry ice particles evaporate, which is much stronger than using chemical solvents, sandblast cleaning and other mold and equipment cleaning techniques. Therefore, it has become the first choice for remodeling contaminated or scaled molds, and this technology can save time, increase productivity and improve benefits.

Molds are vital to thousands of businesses, but manual cleaning with chemical solvents-one of the most common ways to repair molds-is a time-consuming, costly and environmentally problematic process. And if the mold is not cleaned well, it will produce a problematic or divided product.

Benefits during cleaning

Dry ice spray cleaning technology is very practical and effective in cleaning various molds. Look at these strengths:

Dry ice blast cleaning technology has been approved as a usable cleaning method by the (US) Environmental Protection Agency, the (US) Food and Drug Administration, and the United States Department of Agriculture.

Dry ice blast cleaning technology does not release harmful gases into the atmosphere.

Dry ice blast cleaning technology does not generate secondary waste.

Dry ice spray cleaning technology is safe and non-toxic (dry ice particles will sublime in the air and disappear after hitting the mold surface).

Dry ice blast cleaning technology reduces or completely eliminates the possibility of workers being harmed by chemical cleaning agents (and also reduces the company's liability caused by it).

Standard operating rules for feed pellet machine products

Regarding the operation of the daily production specifications of the breeding feed machine, the daily operation specifications of the feed crusher: the operation specifications and maintenance of the feed machine are very important to its life, especially the rural individual family farmers must not be ignored.

1. Before opening the machine, check the lubrication effect of each part, and check whether the screws of each connecting part are loose. If there is any abnormality, deal with it immediately.

2. During the work of the feed crusher, the operator must always be near the machine. During the operation of the machine, the dismantling of the machine must not be done, and things other than the raw materials must not be placed in the raw materials or feeding mouth.

3. Workers must not wear gloves during work.

The machine is blocked. Do not put your hands directly in the machine. Do not handle with sticks, etc. The feeding station is on the side of the feed crusher. It is forbidden to supply materials directly to the front to prevent bouncing materials from hurting employees.

4. After a total of 300 hours of mechanical work (for large machinery, a small feed pellet machine such as a 250 pellet machine must be cleaned every 2 hours). Overall repairs, bearing cleaning and oil replacement are required. If you need to stop for a long time, you need to remove the belt.

Why the new feed pelletizer equipment can produce different livestock

Different animal husbandry and breeding all require different mechanism feed products, so the supplier and supplier of Hengxinyuan feed pelletizer equipment requires different materials for pelleting technology: along with livestock and poultry, aquaculture and other breeding industries and wood chips, peanut shells, cottonseed meal, etc. With the popularity of pellet feed in emerging industries, more and more units use feed pelletizer equipment. According to the current feed ratio and different regions, users have different requirements for pellet feed.

Different feed manufacturers require good pellet quality and the highest pelleting efficiency for their pellet feed. Different feed formulas have different choices of ring parameters to inhibit these feeds. The ring parameters are mainly expressed in materials, pore sizes, and pores. Shape, aspect ratio, and aperture ratio are selected.

The choice of ring parameters must be determined based on the chemical composition and physical properties of the various ingredients that make up the feed formula.

The chemical components of the raw materials are mainly protein, starch, fat, cellulose, etc. The physical properties are mainly particle size, moisture, capacity, etc.

Flat feed pellet machine

Livestock and poultry granular materials mainly contain wheat and corn, high starch content, low fiber content, high starch feed, inhibit the feed, ensure that the starch is fully gelatinized, and reach high temperature and processing conditions. The thickness of the ring type is generally thick, the pore size is wide, and the length is long. The diameter ratio of broilers, ducks and other poultry materials generally 1: 8-1: 10 is high-energy feed, high in fat content, easy to pellet, and generally has a large diameter, ranging from 1:10 to 1:13.

The aquatic materials are mainly fish feed, shrimp feed, and soft-shelled turtle materials. The fish feed has a high content of crude fiber. The shrimp feed and soft-shell turtles have a low content of crude fiber and high protein content.

Aquatic materials require particles to be stable in water for a long time, consistent diameter, consistent length, fine particle size and high maturity when granulating the material. Pre-cooking and post-cooking technologies (feed extruder) are required respectively.

The annular aperture used for fish feed is generally between θ1.5 and θ3.5, and the range of aspect ratio is generally between 1:10 and 1:12.

The ring-shaped aperture used for shrimp feed ranges from θ1.5 to θ2.5, and the aspect ratio ranges from 1:11 to 1:20.
Turtle material has a large ring-shaped pore size, ranging from θ3 to θ8, and high protein content. Therefore, the aspect ratio ranges from 1:12 to 1:20. The specific parameters of the aspect ratio should be selected according to the nutritional indicators and The user's requirements are determined.

At the same time, in the design of the shape of the flat feed pellet machine, the step hole is not used as much as possible under the condition of strength allowance, and the length of the cut particles must be consistent.

Operation process of biscuit machine production line

The operation process of biscuit machine production line: biscuit forming machine—> tunnel hot air circulation electric oven—> injector—> turning machine—> cooling line—> biscuit finishing machine—> biscuit sandwich machine—> packing machine. Process flow of biscuit production line: flour, auxiliary materials—> dough preparation—> tableting—> roll cutting molding—> baking—> fuel injection—> cooling—> finished product.

    The correct use and maintenance of the biscuit production line is an important part of the equipment management work. The operators and professionals perform a series of maintenance work on the equipment according to the equipment's technical information and parameter requirements and maintenance details. It is also an objective requirement of the equipment's own movement.

Taizy Food Machinery Co., Ltd. is a comprehensive enterprise specializing in food machinery research, development, production, science, and engineering. Toughness and crispy biscuit complete equipment, with advanced technology, centralized functions, simple operation, and other characteristics, is the ideal new food machinery selected by the majority of users.

Crispy Biscuit Machine

The biscuit produced by the crispy biscuit machine is a high-fat biscuit, which is generally thick. It is formed by one die stick printing and high output. The complete set of equipment for the biscuit machine process: Hemen-biscuit molding (crispy / toughness)-salt sugar sprinkle Taste-baking-fuel injection-turning machine (90 or 180 ° to save plant space)-cooling-differential cake sorting-packaging.

The function of the crispy biscuit machine is to put the mixed dough into the machine and roll it at one time, and then bake, spray, and cool to produce golden, delicious and crispy biscuits. The pattern of the biscuit can be changed according to customers' preferences. Simple operation and low investment, it is one of the ideal equipment for food processing plant investment. Can also be customized according to customer requirements, different specifications.

We need to clean the crispy biscuit machine daily in the daily use process to keep the machine clean. This can prevent the biscuit machine from blocking and affecting the taste quality of the biscuit. Before buying a biscuit machine, please confirm the durability of the machine. Our company has rich experience in producing biscuit machines, product quality is reliable, safe and stable. The fully automatic cake press is a machine that uses water and good noodles to make a cake-like cooked food. The cake machine is composed of a frame, a pneumatic component, an electrical component, a heating element and a forming mold. The biscuit machine has a reasonable structure, sophisticated manufacturing, high degree of continuity, mechanization and automation, and has high safety and hygienic requirements.

Biscuit machine

The biscuit machine is divided into tough biscuit machine and crisp biscuit machine, which can produce tough biscuit, crisp biscuit, peach crisp, biscuit thickness can be adjusted arbitrarily, mechanical operation, frequency conversion sculpture, freely adjusted according to different products, and also has automatic leakage power failure With alarm light trap function, the temperature can be adjusted freely according to different products, automatic braking, automatic fuel injection, automatic cooling, and other functions. The following mainly introduces the relevant knowledge of the ductile biscuit machine!

How does the tough biscuit machine work? Add the dough to the biscuit machine. After installation, press it on the baking sheet, squeeze it hard, then pick it up, shake it twice, and the pattern will come down. In addition, you need to pay attention to the following: First of all, you must press the baking tray or other hard objects, otherwise it will come out.

The two-stage pastry machine of the tough biscuit machine presses the dough into a suitable thickness through a one-stage or two-stage dough roller. The filling is filled into the dough by an automatic filling machine, and the dough is rolled into a cylindrical shape by a rolling roller. The forming cutter cuts into a spherical shape or a long-shaped cake embryo and then passes through the cake forming process. The whole forming process will not damage the gluten and maintain the original flavor of the hand. Diversified products can be produced by changing the grinding tool. The weight and quality of the products produced are relatively stable.

Started yogurt production line

      After the motor is started, it must be jogged first, and then run two strokes with both hands to ensure that the cam angle value is in the range of 345 ° — + 10 °. After the operation preparation indicator lights up, it will switch to a single operation. The jog function is only used to jog the operating machine to make the slider go down. Note that it cannot be pressed for a long time, and it cannot be directly used for the production of continuous yogurt production line. Otherwise, the clutch friction plate will be damaged.

     After starting the main power supply, press the motor start button on the control box. During the motor startup process, observe the indicated value on the inverter, and then proceed to the next step after stabilization.

     After a successful single start, switch to continuous operation. Turn the knob to the "continuous" state, and press the green start button on the workbench with both hands at the same time for at least 6 seconds. The yogurt production line runs normally. You can loosen your hands for continuous operation. Rush to work.

     Before entering continuous work, the safety protection device should be opened, and the detection device should be sent by mistake to confirm that it is normal before continuous production.

Emergency stop operation: During the operation, if you need to stop immediately due to a fault, you can press the emergency stop button to power off the main motor and the slider also stops moving. After troubleshooting, you should reset the emergency stop button before you can. Restart the motor. After the emergency stop, the slider stops at any position. To make a "single" or "continuous" stroke, you must first turn the button to "inching" and press the button to the top dead center.

      Single stroke operation: Turn the selector switch to the single stroke position, press the two-hand operation button with both hands at the same time, and then release the button until the cam angle display value exceeds 180 °. The slider of the yogurt production line can automatically return to the top dead center. The cam indication value is 0 °. If you release any of the start buttons in the range of 0-180 °, the yogurt production line can be stopped. At this time, it is necessary to return to the "inching" state to return the yogurt production line to the top dead center and restart the "single" operation.

     When the machine is stopped after work, the continuous state should be changed to the manual state first, and the slider should be moved to the bottom dead center by running with both hands. Then hit the disconnected state, press the motor stop button, the power off knob, and finally disconnect the main power and compressed air source.

Precautions for using yogurt production line

 During the operation, you must stick to your post. If you must leave the post, stop the equipment and remove the key for turning on the press. Do not allow someone to replace the operation without authorization.

     During the operation, we must always pay attention to the operation of the production line. It is strictly forbidden to chat with others, and it is forbidden to work after drinking or mental fatigue. It is forbidden for two or more people to operate the yogurt production line at the same time. If necessary, someone must direct and control the operation of the switch.

     During the operation of the yogurt production line, the photoelectric protection device and the misfeed detection device on the mold must be turned on.

     Moulders must regularly check the mold installation, such as loosening of clamping platen bolts or slippage of platen should be adjusted in time. When adjusting or handling equipment failures, you must stop and cut off the power. Electrical faults must be handled by an electrician.

     The materials used in the yogurt production line must meet the requirements of the product. If you find any quality problems such as wrinkle damage and uneven surface, please report to the workshop supervisor in time.

     The operation process must pay attention to whether the delivery is smooth. Once the phenomenon of jamming or yogurt production line overlaps, you must press the emergency stop button to stop production, and record the relevant content in the "Device Operation Day Record Form" in time.

     When using the yogurt production line, the operator finds that the yogurt production line is abnormal (such as loose rotating parts, operating device failure, mold looseness and defects) or there are abnormal noises (such as continuous clicking sound, popping sound), and they should immediately stop for repair. And timely record the relevant content in "Equipment Operation Day Record Form".

     After the work is completed, the main power supply should be turned off, the air source switch should be turned off, scraps should be removed, the production line should be cleaned, and the tools and objects should be neatly placed to ensure that the passage is smooth and safe and civilized.

     The qualified molders strictly install the "Instruction Manual for Loading and Unloading" to perform the mold disassembly and installation. The clamping plates, horns, bolts, and nuts used for clamping the mold must be properly intact to ensure the clamping is firm.

     During the production of yogurt, no one is allowed to touch the running part of the belt, do not put their hands into the working area of ​​the yogurt production line, and do not walk across the belt and the workpiece.

     If the mold on the yogurt production line must be removed for mold repair or equipment maintenance, a warning sign of "No Operation" must be displayed.

When the production line fails, the on-duty mechanic should cooperate closely, check and repair in time, eliminate the equipment abnormality as soon as possible, and make maintenance records.

     The tools, measuring tools and turnover boxes required for production must be placed in strict accordance with the requirements, and they must not be placed at random and the passage must not be blocked. It is strictly forbidden to place any items on the workbench of the yogurt production line. If the mold is not completed when off work, a warning sign of "No Operation" shall be displayed.