Reading Pretzel Complete Forming & Caustic Cooking Line

15” Extruder with 24” Caustic Cooker System

System Overview

This system consists of a Reading Pretzel 15-inch extrusion system integrated with a 24-inch caustic cooker, designed for the continuous production of traditional pretzel products. The line performs the critical forming and alkaline treatment stages required to achieve authentic pretzel texture, color, and flavor prior to baking.

Built in heavy-duty stainless steel construction, this system is suitable for medium to high-capacity industrial pretzel production and integrates seamlessly into a full pretzel line.

Process Description

1. Dough Feeding & Conditioning

Prepared pretzel dough is fed into the extruder hopper. The dough must be properly conditioned with controlled hydration and development to ensure consistent extrusion.

2. Extrusion & Forming – 15” Pretzel Extruder

The Reading Pretzel 15” extruder uses a precision auger-driven system to convey dough forward and extrude it through interchangeable forming dies.

Function

• Forms continuous dough ropes or shapes
• Maintains consistent weight and geometry
• Allows for a wide range of product types

Capabilities

• Pretzel rods
• Sticks
• Nuggets
• Braided or custom shapes

The extrusion process ensures:

• Uniform density
• Consistent product sizing
• High throughput with minimal variation

3. Transfer to Caustic Cooker

Immediately after forming, the product is transferred onto a wire mesh conveyor system of the caustic cooker.

• Maintains spacing and alignment
• Prevents deformation of soft dough
• Synchronizes with extrusion output

4. Caustic Cooking – 24” Cooker

The 24” Reading Pretzel caustic cooker applies a controlled alkaline (sodium hydroxide) solution to the surface of the dough.

System Components

• Stainless steel tank and housing
• Wire mesh conveyor belt
• Recirculating caustic system
• Spray / immersion application
• Adjustable dwell time via variable speed

5. Chemical & Physical Transformation

During this stage:

• The dough surface is exposed to alkaline solution
• Rapid surface gelatinization occurs
• A thin outer skin is formed

Results

• Characteristic deep brown color after baking
• Glossy crust finish
• Authentic pretzel flavor development
• Controlled moisture retention

👉 This is the defining step that differentiates pretzels from standard baked dough products.

6. Dwell Time Control

The conveyor speed controls the exposure time to the caustic solution, directly affecting:

• Final crust thickness
• Color intensity
• Texture development

7. Discharge to Baking System

After exiting the cooker:

• Product is fully conditioned for baking
• Can be salted prior to oven entry
• Transfers directly to tunnel or rack oven (not included)

System Advantages

• Proven Reading Pretzel industrial design
• Continuous, high-efficiency operation
• Consistent product quality and repeatability
• Hygienic stainless steel construction
• Easy integration into existing production lines
• Adjustable for multiple product types

Typical Line Integration

This system forms the core of a complete pretzel production line:

Mixer → Extruder → Caustic Cooker → Salting → Oven → Dryer → Packaging

Estimated Capacity

Depending on product type and size:

👉 up to 400+ lbs/hour

Utilities Requirements

• 3 Phase Electrical Power
• Variable frequency drives (speed control)
• Compressed air (if applicable to valves/systems)
• Caustic handling system (NaOH solution)
• Water supply for dilution and cleaning

Construction

• Stainless steel product contact surfaces
• Heavy-duty industrial frame
• Wire mesh conveyor belt (caustic resistant)
• Industrial drives and gearboxes

Condition

• Used, well-maintained
• Structurally sound
• Suitable for immediate installation or minor refurbishment

Applications

• Soft pretzels
• Hard pretzels
• Pretzel sticks / rods
• Snack pretzel products
• Custom extruded baked goods

Professional Summary

Industrial Reading Pretzel 15” extruder and 24” caustic cooker system designed for continuous forming and alkaline treatment of pretzel dough. The system extrudes dough through precision dies and conveys product through a controlled caustic application process, which develops the characteristic pretzel crust, color, and flavor. This line represents a critical section of any commercial pretzel production system, delivering consistent product geometry, controlled processing, and reliable industrial performance.