How to solve the following problems that may occur with a two-color cookie machine?

A two-color cookie machine is a special baking equipment used to make two-color cookies. It typically consists of two or more independent feeding systems to feed different colors and flavors of dough into the cookie molds separately. It usually consists of a control system, a feeding system, a pressure system, and an oven. The feeding system is one of the most important components. It usually consists of two or more feeding pipes, each of which can independently control the flow of dough. This means that the operator can adjust the speed and position of each feeding pipe as needed to obtain the desired recipe and shape.
The following are some common problems and solutions that may be encountered during the operation of a two-color cookie machine:
I. Extrusion Problems
Problem: Uneven two-color mixing, color layering
Reasons:
Large differences in viscosity or consistency between the two types of dough, resulting in uneven mixing during extrusion.
The machine's extrusion port design is unreasonable (e.g., the dual-chamber channels are not tightly aligned).
Solutions:
Adjust the water content or butter ratio of the two types of dough to achieve consistent viscosity.
Check and clean the extrusion port, ensuring that the dual-chamber channels are aligned and unobstructed.
Problem: Intermittent or interrupted extrusion
Reasons:
The dough is too dry or too wet, resulting in poor fluidity.
The screw conveyor speed is mismatched, resulting in unstable pressure.
Solutions:
Optimize the dough recipe (e.g., appropriately increase egg liquid or milk to adjust humidity).
Adjust the machine speed to ensure that the two-color dough is extruded synchronously.
II. Forming Problems
Problem: Cookie shape distortion or sticking
Reasons:
Uneven oven temperature, causing the cookies to soften and deform.
The dough has a high fat content, leading to excessive spreading after extrusion. Solutions:
Preheat the oven to the appropriate temperature (usually 180°C~200°C) to ensure even heating.
Reduce the amount of butter or increase the proportion of flour to adjust the dough consistency.
Problem: Blurred or smudged color boundaries between the two doughs
Reasons:
Insufficient color saturation in the two doughs (e.g., insufficient amount of food coloring).
The dough was left standing for too long after extrusion, causing color bleeding.
Solutions:
Increase the amount of food coloring (such as gel food coloring) to ensure vibrant colors.
Bake immediately after extrusion to avoid prolonged exposure to air.
III. Equipment Malfunction Problems
Problem: Machine jamming or abnormal motor noise
Reasons:
Hard objects in the dough (such as sugar lumps, flour clumps) are blocking the extrusion nozzle.
Insufficient lubrication of the screw conveyor, resulting in excessive friction.
Solutions:
Stop the machine and clean the extrusion nozzle and conveyor, and check if the dough is uniform.
Regularly lubricate the transmission parts with lubricating oil (such as food-grade silicone oil).
Problem: Heating element not working or temperature control failure
Reasons:
Heating element damaged or poor contact.
Thermostat malfunction or sensor failure.
Solutions:
Replace the heating element and check if the wiring is secure.
Calibrate or replace the thermostat to ensure accurate temperature display.
IV. Cleaning and Maintenance Problems
Problem: Residual dough hardens and is difficult to clean
Reasons:
Failure to clean promptly leads to the dough drying and adhering to the inside of the machine. Rinsing oily residue with cold water causes the oil stains to solidify.
Solution:
Wipe the machine body with hot water (and a small amount of dish soap) to soften the remaining residue.
Regularly disassemble key components (such as the extrusion nozzle and propeller) for thorough cleaning.
Problem: Parts rusting or corroding
Reasons:
Moisture is not dried after cleaning, leading to oxidation of metal parts.
Prolonged contact with acidic ingredients (such as jam and yogurt) accelerates corrosion.
Solution:
Thoroughly dry or air-dry the equipment after cleaning, and apply edible oil to prevent rust if necessary.
Choose food-grade stainless steel accessories to reduce the risk of corrosion.