Configure a TSR line by defining annual qualified output, operating time, raw-material condition and target product; calculate the required wet-line, drying and packaging duties separately; and then use material balance and a station-by-station cycle table to confirm that they match. Stable line capacity is determined by the limiting process under qualified-product conditions, not by adding machine nameplate capacities.
Define capacity correctly
Project discussions often mix annual target, design hourly duty, theoretical cycle conversion, short test result, stable qualified output and actual annual production. These are different measures. A short uninterrupted run does not prove the same annual result, and a theoretical machine cycle is not finished-product capacity.
Every capacity statement should identify the material, product, line count, operating hours, loading basis, quality requirement and whether cleaning, maintenance, faults and changeovers are included.
Convert annual output to design duty
An initial planning relationship is:
required qualified hourly output = annual qualified output ÷ planned production days ÷ planned production hours per day ÷ planned operating efficiency
This is a starting point, not an equipment guarantee. Define whether production days exclude major maintenance, whether daily hours exclude cleaning and shift change, which losses are included in operating efficiency, and whether the quantity refers to wet raw material, dry rubber or released finished bales.
Check operating scenarios
Engineering should compare at least normal operation, seasonal or short peak intake, low-load operation, cleaning and maintenance, and abnormal raw-material conditions. Stable output must account for cleaning, roller or knife service, packaging-material replacement, planned maintenance, fault recovery, waiting for material and quality disposition.
Buffers can absorb short disturbances but should not conceal a persistent mismatch. Large wet-crumb accumulation can change retained water and agglomeration before trolley filling.
How raw material changes the line
Cup lump, field coagulum and coagulated sheets can differ in size, hardness, moisture, contamination and storage history. Representative samples and operating information are needed; processing trials may be required.
Raw-material variation can change cutting and conditioning, the number of breaking and washing stages, blending strategy, wet mixing or screw kneading, creping and granulation stages, roll geometry and drive, transfer and water separation, and the required cleaning and maintenance access. Relatively uniform prepared material may support a simpler arrangement; hard or variable material may require more progressive treatment.
Match wet-line capacity
Do not evaluate only the breaker or creping machine. Create a continuous cycle and duty table from raw-material feeding to trolley filling. Check cutting, soaking and feeding; each breaking, washing, transfer and sludge-removal stage; each kneading, creping, granulation and conveying stage; and water separation and trolley filling.
Include blockage cleaning, roll or knife maintenance and the real availability of pumps, tanks, elevators and conveyors. The discharge condition of one machine must suit the receiving machine as well as meet the required throughput.
Calculate dryer throughput
The theoretical throughput relationship for a trolley dryer is:
theoretical hourly throughput = effective dry-rubber loading per trolley × 3600 ÷ trolley interval in seconds
For multiple independent dryers, verify each line separately before combining them. The calculation is valid only when wet crumb and loading are suitable, residence time and heat and airflow produce compliant rubber, the heat source and trolley system can operate continuously, and both upstream and downstream processes support the same duty.
Increasing trolley loading or shortening the interval is not valid capacity improvement if it causes underdrying, tackiness or noncompliant finished product.
Match packaging capacity
Convert dryer output into the average required bale rate using the project bale specification, then evaluate unloading, cooling transfer, weighing and adjustment, feeding, baling and discharge, check weighing, metal and quality checks, wrapping or bagging, marking, palletizing and full-load transfer.
Use continuous station cycles and availability, not the fastest isolated motion. Parallel stations, controlled buffers or bypass arrangements can be assessed for real bottlenecks without bypassing required inspection and traceability.
Site and lifecycle inputs
Product and destination-market requirements affect blending, drying, testing and packaging. Utilities must cover fuel, electricity, water, water treatment, drainage, compressed air, steam or thermal oil as applicable. A production machine that fits inside a building may still lack safe raw-material and finished-product flow, trolley circulation, foundations, lifting access, maintenance space or personnel segregation.
Lifecycle evaluation should include energy and water, wear parts, maintenance labour, spare-parts support, staffing, downtime, automation support and future modification. At a bottleneck, maintainability and rapid recovery may be more valuable than a higher short-duration motion speed.
Commissioning and acceptance
Acceptance criteria should state the raw-material range, target product, qualified output, continuous operating period, staffing and available utilities. A practical sequence includes individual-machine checks, unloaded interlocking, material commissioning, continuous operation and performance confirmation.
Capacity acceptance should use qualified finished output under the agreed conditions and should retain test, stoppage and abnormal-disposition records. Results from one documented project illustrate engineering capability but do not create an unconditional guarantee for another raw material or site.
Minimum project inputs
- raw-material types, sources, seasonal variation, storage time, size, hardness, moisture and contamination;
- target product, destination market, applicable specification, additional customer limits and bale format;
- annual output, production days, shifts, daily hours and maintenance strategy;
- fuel, electricity, water, drainage, environmental controls, compressed air and other utilities;
- building dimensions, levels, foundations, material flow, maintenance and safety access;
- automation scope, staffing, information-system interfaces and traceability requirements; and
- existing equipment and retained interfaces for a retrofit.
Incomplete inputs can support a concept study, but they are not enough to freeze equipment quantity, dryer settings or guaranteed capacity.
Frequently asked questions
Why can a line miss its target when every machine appears large enough?
Because continuous output also depends on feeding, transfer, wet-material condition, trolley filling, drying quality, inspection, packaging, buffers and recovery from stoppages. The full cycle table identifies the true limitation.
Can dryer output be increased simply by shortening the trolley interval?
Only after wet material, loading, effective residence time, heat, airflow, cooling, upstream and downstream cycles, and finished-product quality have all been confirmed at the new condition.
Can equipment be selected from a fixed capacity table?
No. The configuration must be based on current raw-material evidence, process route, heat source, utilities, target product, automation scope, customer requirement and site engineering.
Technical reference: Sinyoung engineering information and documented projects; Introduction to Natural Rubber Primary Processing Technology, Chapter 7. Content prepared by the Sinyoung technical team.