Designing and manufacturing melamine dinnerware moulding machine for over 2 decades, the engineering team from Shunhao Machines Factory has observed one recurring bottleneck hurting melamine tableware factories worldwide: unstable long-run pressing caused by under built tension columns.

Most melamine machine suppliers cut costs by installing thin tension columns. These cheaper components work fine for short, intermittent runs, but fail when factories operate 24/7 mass production. After months of cyclic high pressure, thin columns gradually deform and vibrate. As a result, inconsistent mold gaps, burrs, uneven product density, high scrap rates, repeated downtime for calibration and part replacement. All of these eat into your factory output and profit margins.

Shunhao’s auto melamine hydraulic machine solves this fundamental weakness with 4 extra-thick custom tension columns. Our reinforced design maintains mold parallelism under continuous heavy load, delivering reliable melamine production year after year.

Function of Four Thick Tension Columns of Melamine Molding Machine:

• When melamine is molded, the main cylinder moves upward to close the mold and clamp it tightly. The mold generates a significant outward expansive counterforce. These four thick tension columns firmly pull the upper beam, moving platen, and lower frame together, offsetting the mold's opening rebound force. This ensures that the mold does not open during closing, resulting in uniform product wall thickness and no flash.
• Tension columns form the backbone of every melamine molding press. Their core job is to carry the full high-pressure load during each molding cycle, hold upper and lower molds perfectly parallel, and offset mechanical fatigue from thousands of repeated pressing strokes.
• The column’s thickness, raw material and heat treatment directly determine how reliably your machine performs over time. However, thin columns have a low safety margin against fatigue. Under sustained high pressure, tiny bending errors accumulate. Over months, those small distortions become visible vibration and misalignment. Continuous industrial mass production demands thickened and high-strength tension columns to preserve molding precision.
• Shunhao’s melamine tableware molding machine adopts 4 guide-pin with well-grind heat-treatment, be able to variable adjustment of speed and pressure. The finished column diameter is substantially thicker than the standard tension columns offered by most other melamine machine builders. This upgrade creates a measurable technical advantage for continuous melamine production.

Why Are Thick Tension Columns of Melamine Molding Machine So Important?

1. Determines the maximum clamping capacity of the equipment

The diameter, material, and tensile strength of the tension columns directly determine how much clamping force the machine can withstand. If the tension columns are too thin or of poor quality, they may elongate or even break during high-pressure molding, leading to major safety accidents.

2. Directly affects product quality

Consistent rigidity of the four columns → stable parallelism of the slide → uniform mold closure. Once the four tension columns are unevenly tight, the slide tilts, causing melamine products to have: uneven thick flash on one side, material shortage, product deformation, and accelerated mold wear.

3. Affects equipment service life

Melamine molding involves repeated cycles of pressure application and release, which is a cyclic fatigue load. Tension columns are subjected to long-term alternating tension; poor quality leads to metal fatigue, gradual stretching and deformation, resulting in permanent loss of overall machine precision.

4. Core safety component

It is a critical load-bearing part of the pressure equipment. If the tension column breaks, the upper crossbeam and slide will instantly lose stability, making it one of the highest-risk components of high-pressure molding machines.

5. High repair cost

Replacing four thick tension columns requires complete disassembly of the machine, re-tightening, and re-calibrating parallelism, resulting in long working hours and high costs; this is far more expensive than replacing consumables like oil seals and electric heating tubes.

Real Industrial Production Case Study

One of our melamine tableware manufacturers operates 24-hour continuous production for hotel-grade melamine plates and bowls. Prior to switching to our equipment, they utilized molding machines equipped with standard thin tension columns from competitors.

However, visible machine vibration during the pressing process resulted in large volumes of out-of-specification tableware. Tension column bending appeared after just 10 months of operation, forcing production stops for replacement and recalibration. Meanwhile, annual downtime from column and mold issues caused major lost production volume.

Following the installation of our machine equipped with four extra-thick tension columns, there has been zero column deformation and stable press operation over a period of two years of continuous production. The defective product rate has decreased, and annual maintenance downtime has been reduced.

With more than 20 years specializing in melamine molding machinery manufacturing, Shunhao has proven that 4 extra-thick tension columns are a mature, reliable upgrade for factories focused on long-run stable melamine production. Investing in a press with reinforced extra-thick tension columns protects your production consistency and bottom line.

Global melamine tableware producers are welcome to contact our team for full technical specifications, production test data, custom configuration options and factory visit arrangements.

FAQ

Q: What is the packaging of the molding machine?

A: It is recommended to transport the whole cabinet (FCL=FULL CONTAINER LOAD), film packaging, use wood to fix the four corners of the base to prevent movement; then thicken the wire The zipper is fixed in the container, so that the machine will not move or shake during transportation, ensuring that the machine is perfectly transported to your factory.

Q: What is the general delivery time for tableware molding machines?

A: 20-50 days after receiving the deposit, depending on the machine order quantity and machine model.

Q: Do you have CE for the machines?

A: Yes, CE certification is available.

Q: How can I contact with your team?

A: Please call us at +86 15905996312 or send us an Email: machine@hongancn.com.