I. Equipment Introduction

1. Equipment Purpose

To conduct online inspection of cap quality on Yangyuan can production lines and automatically reject caps that fail to meet standards.

2. Equipment Features

Non-contact online inspection, ensuring no damage to products.

High inspection speed, reaching up to 60,000 cans per hour.

Intuitive and flexible human-machine interface (HMI) with multi-level user permission settings.

Equipped with an industrial-grade cooling system to prevent system crashes during prolonged operation in summer.

Customizable functions tailored to the customer’s actual production scenarios.

Automatically stores daily images of defective caps, with adjustable storage duration as needed.

24-hour remote service (enabling remote control and monitoring of the equipment).

Continuous rejection and automatic shutdown function (the production line stops automatically after a specified number of defective products are rejected).

360° all-round cap inspection, reducing false rejections caused by can friction or clamping.

Zero-delay cap inspection, minimizing the impact of cap and packaging colors on inspection accuracy.

II. Detection Functions

Cap presence verification

Cap angle deviation (rejection triggered when deviation ≥ 5°)

Cap bulging (caused by can expansion or air leakage, rejection triggered when deviation ≥ 1mm)

III. Installation Location

On-site installation requirements: A 1.5-2 meter straight conveyor section shall be reserved right after the sealing machine.

IV. Detection Principle

Cap Bulging Detection Principle

Curved surface scanning technology is adopted to continuously scan the top surface of the can cap. If the seal is defective or the internal pressure of the can is abnormal, the bulging degree of the cap will show an abrupt change—this change is used to determine whether the cap seal is qualified.

Sample image processing effect, the left is the original image, the right is the processed image

Lid Angle Detection Principle

A Gigabit digital camera is employed to capture images of can caps from a top-down perspective. The collected images undergo digital analysis and 360° template matching. Cans with unqualified cap angles are automatically rejected online in real time.

When a can passes the positioning sensor, the sensor detects its arrival, and the control unit records the can’s ID and the current encoder signal. The positioning sensor then triggers the digital camera to capture an image of the can cap, which is transmitted to the image processor via a network. The image processor processes and analyzes the received image, and sends the results to both the human-machine interface (HMI) for dynamic display and the control unit. Upon receiving the signal indicating an unqualified cap, the control unit instructs the rejector to remove the corresponding can with the defective cap from the production line automatically.

V. Equipment Configuration Details and Inspection Accuracy

(I) Detailed Equipment Description

A. Technical Parameters

Equipment Name: Can Cap Inspection Machine

Model Name: MT-YLG-PG-C1

Applicable Production Speed: 60,000 cans per hour

Inspection Area: Cap Inspection

Rejection Method: Automatic rejection of cans with defective caps identified by the inspection unit

Safety Protection Rating: IP65

B. Main Applications

Widely applied in canned beverage production lines for inspecting various types of can caps and automatically rejecting defective ones.

C. Technical Features

Reduces labor input and overall production costs

Enhances production efficiency and product quality

The inspection results of the cap inspection machine comply with the relevant technical standards of the manufacturer

D. Detection accuracy:

Note: The rejection rate of the test item "no bottle cap" described in the table means that out of 10,000 packages of unqualified products without bottle caps tested by the equipment, there may be 1 can that is not rejected. This is only theoretical experimental data, and the same applies to other test items.