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Views: 0 Author: SINOBAKE-Johnson Publish Time: 2026-09-17 Origin: Site
From Raw Materials to Finished Biscuits: Understanding the Industrial Biscuit Production Process
A modern biscuit production line is more than a sequence of machines.
It is an integrated production system in which raw materials, dough properties, forming equipment, baking conditions, cooling, handling, packaging and process control must work together.
The basic concept can be summarized as:
Stable Feeding → Precise Forming → Consistent Baking → Controlled Cooling → Reliable Packaging
However, the exact process route depends on the product.
Hard biscuits, soft biscuits, cookies and sandwich biscuits may use different dough systems, forming technologies and secondary-processing equipment. Therefore, there is no single configuration that is suitable for every biscuit product.
This article explains how an industrial biscuit production line works, from raw material handling to final packaging, and why each stage matters for product consistency, throughput and production efficiency.
At a simplified level, an industrial biscuit production process can be represented as:
Raw Materials → Dosing & Weighing → Mixing → Dough Handling → Forming → Baking → Cooling → Handling → Secondary Processing → Packaging
But the real production system has three interconnected flows:
Ingredients and dough move physically through the factory:
Flour / Sugar / Fat / Water / Minor Ingredients → Dough → Dough Pieces → Baked Biscuits → Packed Products
The biscuit itself changes continuously:
Raw Dough → Formed Dough Piece → Baked Biscuit → Cooled Biscuit → Finished Product
Production parameters are monitored and controlled through instrumentation, PLC systems and HMI interfaces:
Recipe → Setpoints → Sensors → PLC → Actuators → Process Feedback → Operator
A stable production line requires these three flows to remain synchronized.
Although individual production lines vary, a typical industrial biscuit process may include:
Raw Material Handling
Automatic Dosing and Weighing
Dough Mixing
Dough Resting or Dough Handling
Dough Feeding
Sheeting / Gauging / Laminating
Biscuit Forming
Tunnel Oven Baking
Cooling
Stacking and Arranging
Sandwiching, if required
Packaging
Not every biscuit requires every stage.
For example:
A hard biscuit may use sheeting, gauging and rotary cutting.
A soft short-dough biscuit may use rotary moulding.
A cookie may use depositing or wire cutting, depending on the dough and inclusions.
A sandwich biscuit requires an additional cream application and biscuit pairing stage.
This product-dependent approach is fundamental to biscuit production engineering.
The production process begins before the mixer.
Flour, sugar, fats, water and minor ingredients must be received, stored, transferred and supplied to the production system in a controlled manner.
Typical raw materials include:
Wheat flour
Sugar
Fats and oils
Water
Milk powders
Salt
Leavening agents
Emulsifiers
Flavours
Cocoa or other specialty ingredients
Product-specific inclusions
Industrial plants may use a combination of manual and automated material handling.
For larger production systems, bulk handling and controlled ingredient metering can reduce manual intervention and improve repeatability.
Variation in incoming ingredients can eventually appear as variation in the final biscuit.
For example:
Flour variation → Water absorption variation → Dough rheology variation → Forming variation → Baking variation → Product consistency problems
This is why industrial biscuit production begins with controlled material management rather than simply starting with the mixer.
Manley’s technology framework places bulk handling and ingredient metering at the beginning of the industrial production system, followed by mixing, forming, baking, cooling and packaging.
Once ingredients are stored, they need to be supplied to the correct production batch or mixer.
The purpose of dosing is simple:
Deliver the right ingredient, in the right quantity, at the right time.
Depending on the factory design, dosing may be:
Manual
Semi-automatic
Fully automatic
An automated dosing system can integrate:
Storage bins or silos
Conveying systems
Weighing devices
Valves
Sensors
Control software
Recipe management
The objective is not automation for its own sake.
The objective is repeatable formulation and stable production.
For example, if the flour-to-water relationship changes from batch to batch, the resulting dough may have different:
Water absorption
Dough consistency
Extensibility
Plasticity
Forming behaviour
Baking behaviour
Therefore, dosing accuracy can influence the process several stages downstream.
Mixing transforms individual ingredients into a dough system with the required physical properties.
This is one of the most important process-control stages.
As Manley notes, mixing is fundamental to biscuit process control, and mixer selection and premix preparation can influence dough technology.
The objective is not simply:
“Mix everything together.”
The objective is to achieve the required dough rheology for the next process.
Important variables can include:
Mixing sequence
Ingredient temperature
Water addition
Mixing time
Mixing speed
Fat condition
Dough temperature
Dough development
Dough consistency
Dough rheology describes how dough behaves when subjected to forces such as mixing, conveying, sheeting or forming.
In practical production terms, it influences whether the dough:
Flows easily
Holds its shape
Can be sheeted
Can be moulded
Can be deposited
Shrinks after forming
Spreads during baking
The correct dough properties depend on the target product.
Not every biscuit production line requires a conventional dough-resting stage.
Whether resting, fermentation or intermediate dough handling is required depends on:
Product formulation
Dough type
Process design
Flour characteristics
Desired biscuit structure
Production method
For some hard or fermented dough systems, a controlled resting or fermentation period may be important.
For other short-dough or cookie processes, the dough may move relatively directly from mixing to forming.
Therefore:
Dough resting is product-dependent, not a universal requirement for every biscuit line.
During this stage, changes in dough structure and moisture distribution can affect subsequent forming behaviour.
This is one reason why the relationship between mixing → resting → forming must be considered as a process chain rather than as independent machines.
After mixing or intermediate handling, dough must be transferred consistently to the forming section.
The feeding system should provide:
Stable material flow
Appropriate feed rate
Controlled dough pressure
Minimal unnecessary mechanical damage
Continuous supply to the forming equipment
This stage may appear simple, but unstable feeding can create downstream problems.
For example:
Uneven feeding → Uneven dough sheet → Variable dough-piece weight → Variable baking → Inconsistent product
This is why:
is the first part of the SINOBAKE process philosophy.
For many hard and semi-sweet biscuit processes, dough is converted into a controlled sheet before cutting.
The typical sequence may include:
Dough Feed → Sheeting → Gauging → Laminating, if required → Final Gauging → Cutting
The initial dough mass is converted into a continuous sheet.
Gauge rolls progressively reduce dough thickness and help achieve a controlled final sheet thickness.
Laminating creates multiple dough layers and may be used for particular products and process requirements.
It is not required for every biscuit.
Manley’s production framework treats sheeting, gauging, dough relaxation, cutting and laminating as distinct technologies because they solve different process requirements.
Dough can develop internal stress during mechanical processing.
If the dough is cut immediately after excessive mechanical working, dimensional instability or shrinkage may occur.
A relaxation stage can therefore help improve dimensional consistency for appropriate hard-dough processes.
The objective is:
Prepare the dough structure for accurate cutting rather than simply move the dough faster.
Forming converts the dough into individual pieces with the desired:
Shape
Weight
Thickness
Surface pattern
Dimensions
The forming method depends strongly on the dough.
Hard dough biscuits commonly use:
Sheeting → Gauging → Cutting
Rotary cutting creates individual dough pieces from the continuous sheet.
Scrap handling is also important because excess dough may need to be returned into the process.
Short doughs may be processed using rotary moulding.
A rotary moulder forms dough pieces using a moulding roll and extraction system.
Cookies can use different forming methods depending on the dough.
Possible technologies include:
Rotary moulding
Wire cutting
Depositing
Extrusion
Soft doughs and doughs containing inclusions such as chocolate chips or nuts may require forming technologies different from conventional hard-dough sheeting and cutting.
The dough determines the forming technology.
Not:
The machine determines the dough.
This distinction is important when designing an industrial biscuit production line.
The oven is one of the most important sections of the entire production line.
The purpose of baking is not simply to heat the dough.
During baking, the dough undergoes significant physical and chemical changes involving:
Heat transfer
Moisture movement
Water evaporation
Structure development
Colour development
Texture formation
Volume change
Industrial biscuit baking involves different heat-transfer mechanisms, including radiation, convection and conduction, depending on oven design and process conditions.
A tunnel oven is normally divided into different zones.
Each zone can contribute differently to the overall baking process.
The required profile depends on:
Product formulation
Dough piece dimensions
Initial moisture
Desired colour
Desired texture
Oven design
Production speed
Residence time is the time the dough piece spends travelling through the oven.
It is affected by:
Oven length
Conveyor/band speed
Product spacing
Production configuration
The relationship can be simplified as:
Residence Time ≈ Effective Baking Length ÷ Band Speed
But residence time alone does not determine product quality.
The temperature profile and heat-transfer conditions throughout the oven are equally important.
One of the major objectives of baking is to remove sufficient moisture to achieve the target product structure and shelf stability.
However:
More baking is not automatically better baking.
Excessive heat or inappropriate baking conditions may cause:
Over-browning
Excessive moisture loss
Burnt surfaces
Texture defects
Uneven colour
Insufficient baking may result in:
High residual moisture
Soft or under-baked texture
Poor colour
Reduced stability
The engineering of biscuit baking therefore requires control of both heat transfer and moisture removal. Biscuit Baking Technology specifically treats baking process, heat transfer and oven design as core parts of industrial biscuit engineering.
Freshly baked biscuits leave the oven at an elevated temperature.
They cannot always be sent directly into packaging.
Cooling allows the product to approach the temperature and condition required for downstream handling and packaging.
A cooling conveyor may provide:
Controlled residence time
Ambient-air cooling
Forced-air cooling
Product stabilization
Transfer to stacking or secondary processing
If biscuits are packaged too warm, condensation or moisture migration can create problems.
Cooling also influences:
Biscuit hardness
Crispness
Handling strength
Packaging performance
Therefore:
Baking → Cooling → Packaging
should be treated as one integrated process rather than three independent machines.
Manley’s production framework specifically includes biscuit cooling and handling after baking and before secondary processing and packaging.
After cooling, biscuits may need to be:
Counted
Aligned
Turned
Grouped
Stacked
Arranged for packaging
The purpose is to convert a continuous product flow into the specific product pattern required by the packaging machine.
For example:
Continuous biscuit flow → Controlled spacing → Stack formation → Packaging feed
This is a critical interface between production and packaging.
If the stacking system cannot maintain the required flow, the packaging machine may become the bottleneck even when the oven has unused capacity.
Sandwich biscuits require an additional secondary-processing stage.
A simplified process may be:
Baked Biscuit → Cooling → Cream Depositing → Biscuit Pairing → Sandwich Formation → Packaging
The cream system must provide controlled:
Cream quantity
Distribution
Temperature
Viscosity
Biscuit alignment
The exact process depends on the product.
For example, different filling materials may behave differently during deposition and pairing.
Secondary processing is therefore not simply an optional attachment to the line.
For sandwich products, it becomes an essential part of the product-forming process.
Manley’s technology framework includes sandwich creams and other secondary processing technologies as a distinct stage after baking and cooling.
Packaging is the final major production stage.
Its functions include:
Product protection
Moisture protection
Mechanical protection
Shelf-life support
Product presentation
Controlled product quantity
The packaging section may include:
Feeding
Collation
Stacking
Wrapping
Sealing
Date coding
Inspection
Cartoning
The packaging system must match the upstream product flow.
For example:
Oven Output → Cooling → Stacking → Packaging
If upstream production is continuous but packaging requires intermittent product groups, an appropriate accumulation and feeding system may be necessary.
Packaging is therefore part of overall line capacity—not simply the last machine.
Modern biscuit production lines rely on process control to coordinate multiple machines and process stages.
A typical control architecture may include:
Sensors → PLC → Control Logic → Drives / Valves / Actuators → Process Feedback
The HMI provides operators with a visual interface for:
Start/stop control
Recipe management
Parameter setting
Temperature monitoring
Speed monitoring
Alarm management
Production status
Fault diagnosis
Because biscuit production is a continuous process.
If one section changes speed without considering the following section, the entire line can become unstable.
For example:
Forming speed ↑ → Oven loading ↑ → Baking condition changes → Cooling load ↑ → Packaging load ↑
Therefore, process control should consider the entire line rather than isolated machines.
Quality control should not begin only after baking.
It should exist throughout the process.
A practical quality-control chain can be represented as:
Ingredient Control → Dough Control → Forming Control → Baking Control → Cooling Control → Product Inspection → Packaging Control
Important variables may include:
Ingredient quality
Flour properties
Moisture
Particle characteristics
Fat condition
Dough temperature
Water addition
Dough consistency
Mixing time
Dough rheology
Dough thickness
Dough-piece weight
Shape
Dimensions
Surface pattern
Oven temperature
Baking profile
Band speed
Residence time
Colour
Moisture removal
Product temperature
Cooling time
Airflow
Weight
Dimensions
Colour
Texture
Moisture
Appearance
Breakage rate
Product count
Seal integrity
Package weight
Coding
Package condition
The key principle is:
Quality should be controlled at the process stage where variation is created.
A biscuit production line is only as balanced as its most restrictive section.
A simplified production relationship is:
Effective Line Throughput ≤ Capacity of the Bottleneck
Potential bottlenecks may occur at:
Ingredient dosing
Mixing
Dough feeding
Forming
Oven
Cooling
Stacking
Sandwiching
Packaging
Suppose the forming section can continuously produce more product than the packaging machine can handle.
The actual factory throughput will ultimately be limited by packaging.
Similarly, increasing oven output does not necessarily increase finished-product output if the cooling, handling or packaging sections cannot absorb the additional product.
Unbalanced equipment capacity
Unstable dough feeding
Frequent product changeovers
Manual intervention
Packaging limitations
Excessive downtime
Poor material handling
Incorrect equipment matching
Inadequate accumulation between processes
Therefore, line design should consider system throughput, not simply the rated capacity of individual machines.
One of the most important concepts in biscuit production engineering is that different products require different process routes.
A typical hard biscuit route may be:
Ingredient Handling
→ Dosing
→ Mixing
→ Dough Handling / Resting, if required
→ Sheeting
→ Gauging
→ Laminating, if required
→ Cutting
→ Tunnel Oven
→ Cooling
→ Stacking
→ Packaging
Hard dough forming commonly relies on sheeting, gauging and cutting.
A soft biscuit route may use:
Ingredient Handling
→ Dosing
→ Mixing
→ Dough Handling
→ Rotary Moulding / Depositing / Other Forming
→ Baking
→ Cooling
→ Packaging
The exact route depends on formulation and dough properties.
A cookie process may use:
Ingredient Handling
→ Dosing
→ Mixing
→ Dough Feeding
→ Rotary Moulding / Wire Cutting / Depositing / Extrusion
→ Baking
→ Cooling
→ Stacking
→ Packaging
Cookies are particularly dependent on dough formulation and forming technology.
For example, dough containing chocolate chips or nuts may require extrusion or wire-cutting technology rather than conventional moulding.
A sandwich biscuit line adds secondary processing:
Biscuit Production
→ Cooling
→ Cream Preparation
→ Cream Depositing
→ Biscuit Pairing
→ Sandwich Formation
→ Packaging
Therefore, the equipment configuration must be designed around the target product rather than based on a generic “biscuit line.”
A useful way to understand an industrial biscuit factory is to connect the entire system through six layers.
What are you trying to manufacture?
Hard biscuit?
Soft biscuit?
Cookie?
Sandwich biscuit?
What process does the product require?
Mixing?
Resting?
Sheeting?
Laminating?
Moulding?
Depositing?
Baking?
Cooling?
Sandwiching?
What equipment can reliably perform each process?
Which parameters need to be monitored and controlled?
Which process variables determine the final product characteristics?
How must the finished product be handled and packed?
This creates a complete engineering chain:
Product → Process → Equipment → Control → Quality → Packaging
This is much more useful than selecting machines individually.
An industrial biscuit production line is an integrated food-processing system.
It begins with controlled raw materials and dosing, develops the required dough properties through mixing and handling, forms the dough according to the product type, applies controlled baking conditions, cools and handles the biscuits, and finally transfers them into secondary processing and packaging.
The exact process route depends on the product.
Hard biscuits, soft biscuits, cookies and sandwich biscuits do not necessarily use the same forming or handling technologies.
The most important principle is therefore not simply:
“How many machines are in the line?”
It is:
How well do the processes, machines, controls and product requirements work together?
A reliable industrial system aims to achieve:
Stable Feeding → Precise Forming → Consistent Baking → Controlled Cooling → Reliable Production
When material flow, product flow and information flow are properly synchronized, the production line becomes more stable, repeatable and easier to manage.
For biscuit manufacturers and factory investors, understanding this process logic is an important step before selecting equipment, estimating capacity or designing a factory.
A typical biscuit production line converts raw materials into finished biscuits through dosing, mixing, dough handling, forming, baking, cooling, handling and packaging. The exact process depends on the biscuit type.
The main steps are generally raw material handling, dosing, mixing, dough handling, forming, baking, cooling, stacking or arranging, secondary processing if required, and packaging.
No. Equipment configuration depends on the product formulation, dough properties, forming method, capacity requirements and factory layout.
Hard biscuits commonly use sheeting, gauging and cutting, while cookies may use rotary moulding, depositing, wire cutting or extrusion depending on the dough formulation and inclusions.
Dough rheology influences how the dough behaves during feeding, sheeting, moulding, depositing and baking. Stable dough properties are important for consistent product dimensions and quality.
The tunnel oven provides controlled heat transfer and moisture removal to transform formed dough pieces into baked biscuits with the required structure, colour and texture.
Cooling helps reduce product temperature and stabilize the biscuits before stacking, secondary processing or packaging.
Bottlenecks can occur when one process has lower effective capacity than the rest of the line. Common examples include forming, oven loading, cooling, sandwiching and packaging.
PLC-based control coordinates equipment and process parameters, while the HMI allows operators to monitor production conditions, adjust settings, manage alarms and supervise the production process.
Some production lines can be designed for multiple products, but product compatibility depends on the formulation, dough properties, forming technology, oven requirements and changeover requirements.
