HZXX-JC04: Latent Crack Detection for O-Rings & Rubber Parts

When to Choose the HZXX-JC04

Among the Shengyi New Material (Huzhou) Co., Ltd. extrusion inspection line, the HZXX-JC04 is the compression-based model: choose it when your defect list includes latent cracks that only open under load. Standard turntable machines image what a relaxed part shows; the extrusion inspection overview (/posts/extrusion-visual-inspection-machines-in-modern-manufacturing) explains the process family - this page is the model-selection guide for the JC04 itself. Full configuration details are on the HZXX-JC04 machine page (/products/hzxx-jc04-extrusion-visual-inspection-machine).

The Three Specs That Drive Selection

• Dimension range: 8-35 mm (compression plates customized per product).

• Camera configuration: 4-15 cameras for full appearance, dimension and compression inspection.

• Repeatability: +/- 0.01 mm.

Per the brochure, efficiency is 20-100 pcs/min depending on product size; the exact cycle time is confirmed against your parts at quotation. All specifications above come from the Shengyi New Material (Huzhou) Co., Ltd. machine brochure and are confirmed per configuration at quotation.

Why Latent Cracks Need Compression

A crack that stays closed while the part is relaxed is typically invisible to surface cameras. Under compression the crack opens enough to be imaged. That is the reason the JC04 exists as its own model: the compression step is the inspection method, and the compression plates are customized per product so the process fits the rubber material characteristics. Per the brochure, within its specified scope - circular or cylindrical rubber parts with moderate hardness that tolerate compression - the process inspects without workpiece damage.

What Products Fit (and What Do Not)

The brochure scope is circular or cylindrical rubber parts with moderate hardness that tolerate compression, in the 8-35 mm range. Hard plastic or metal parts are outside the machine's designed scope. Sizes outside 8-35 mm need custom compression plates to be confirmed - send drawings for anything near the limits.

How the Camera Count Scales

The 4-15 camera range is not a fixed number; it scales with what you need to check. As a rule of thumb for discussion (confirmed per configuration at quotation): fewer cameras cover a focused defect set, more cameras add full appearance coverage plus ID/OD/wire-diameter measurement with optional thickness. The factory confirms the exact count and frame when your defect list and size range are known.

How It Compares with Other Models

• HZXXS02 dual-table machine: inspects both faces by turning parts over - no compression. See the HZXXS02 guide (/posts/hzxxs02-dual-table-inspection-machine).

• Tensile series: stretches rings to simulated working conditions for large and medium rings. See the tensile process overview (/posts/tensile-ai-visual-inspection-machines-process-overview).

• HZXX-JC01 standard model: general-purpose single-table platform without a compression step. See the HZXX-JC01 guide (/posts/hzxx-jc01-single-table-inspection-machine).

• HZXX-JC04 (this machine): compression-based latent crack detection for 8-35 mm rubber parts.

What the Machine Checks

Dimensional checks cover ID, OD, wire diameter and optional thickness. Visual checks cover cracks, bubbles, foreign matter, scratches, breakage, burrs and flow marks, among others. If you are still deciding which defects matter for your product, start with how to define OK/NG defect criteria (/posts/defining-defects-ai-visual-inspection).

How Sample Validation Works

You send samples in three groups - clearly good parts, clearly bad parts, and borderline parts. The factory uses them to customize the compression plates, set the camera positions, and confirm the cycle time and the smallest defect the machine catches on your actual product. The images and OK/NG log come back with the validation.

When Not to Choose This Machine

Not for hard plastic or metal parts, parts outside 8-35 mm without custom plates, or parts that must not be compressed. If compression is not acceptable for your part at all, confirm with the factory which non-compression platform fits instead.

Frequently Asked Questions

Can it find latent cracks in O-rings? Yes - the compression step opens cracks that stay closed while the part is relaxed, so they become visible to the cameras.

Does compression damage the parts? Per the brochure, within its specified scope (circular or cylindrical rubber parts with moderate hardness that tolerate compression) the process is adapted to rubber material characteristics and inspects without workpiece damage.

What defects can it detect in rubber parts? Cracks, bubbles, foreign matter, scratches, breakage, burrs and flow marks, among others, plus ID/OD/wire-diameter measurement and optional thickness.

Which parts fit the machine? Circular or cylindrical rubber parts with moderate hardness in the 8-35 mm range; compression plates are customized per product.

What to Prepare Before You Ask for a Quote

Prepare: part drawings with dimensions and material, the defect types you must catch (including whether latent cracks are on your list), and your throughput target. Samples of good, bad and borderline parts let the factory validate the compression plates and camera positions before quotation.

Next Step

Send O-rings or cylindrical rubber parts in the 8-35 mm range. We prepare custom compression plates, run a sample inspection and return the images and OK/NG log. Contact the team (/contact-us) - Monica (+86 138 5726 5705) or Arya (+86 173 2430 9735), or email info@aivisioncheck.com.