Bottle mouth inspection machine

1. Project Overview

1.1 Project Name: Online Bottle Finish Inspection Machine

Utilizing advanced machine vision inspection technology, the deformation and breakage of glass bottle mouths can be inspected online in a fully automatic and non-contact manner.

The rated output is 48,000 bottles per hour. 

Environmental Conditions

Optimum Altitude: 5-3000 meters above sea level;

Optimum Ambient Temperature: 5°C-40°C;

Optimum Ambient Humidity: 50-65% RH;

Factory Conditions: Parameters such as floor levelness and load-bearing capacity must meet relevant national standards and meet the normal operating requirements of the machine;

Factory Storage Conditions: Upon arrival, parts and machines must be stored in a location that meets relevant national standards. During storage, ensure proper lubrication and maintenance to prevent damage to the surface of the parts or deformation that could affect normal installation, commissioning, and operation of the machine.

Equipment Production Conditions:

Noise: ≤85 dB; actual noise levels may vary depending on the container/package being processed, machine power, building acoustics, and other factors.

Power Supply: (Power connection between the customer's main electrical cabinet and the equipment cabinet)

Power Supply: 3 x 380 AC ±10%, 50 Hz, 3 PH+N+PE.

Lighting Power: 220V, 50 Hz, single-phase.

(Special voltages require prior notification; equipment specifications, delivery time, and price may vary.)

Total Power: Approximately 1.0 kW.

Control Voltage: 24 VDC.

Compressed Air: Minimum 4 bar, maximum 6 bar (customer provides air piping connection between the air source and the equipment main unit).

Equipment Introduction

4.1 Bottle Finish Inspection Machine

Equipment Name: Bottle Finish Inspection Machine

Model: MT-PK021

Quantity: One set

Production Speed: 48,000 bottles/hour

Applicable Containers: PET/PE Bottles

Applicable Production Line: 48,000 bottles/hour 

Installation Location: Inside the blow molding machine, at the appropriate position of the bottle exiting the mold or on the conveyor chain

4.2 System working principle and process

Figure 4: System working principle and flow chart

System Operating Principle and Process

1> A bottle passes the positioning sensor, which detects its arrival and records the can ID and current encoder value through the control unit.

2> The positioning sensor triggers the camera to capture an image of the current bottle mouth. After acquisition, the image processor processes the image, transmitting the processed results to the human-machine interface for dynamic display and to the control unit to prepare for the rejection of cans with unqualified mouths.

3> Upon receiving the unqualified signal, the control unit notifies the rejector to remove the can with the corresponding ID.

4.3 Image Acquisition Components:

Light Source: Utilizes an LED area light source with a lifespan of up to 30,000 hours. Using foreground illumination, it clearly displays information about the object being measured. In the image, the bottle mouth appears as a continuous bright ring. A manual aperture fixed-focus lens is used. Adjusting the focus ring maximizes the image on the CCD target surface. Optimizing image brightness is achieved by adjusting the aperture ring.

Camera: Utilizes an area array CCD analog camera with a resolution of 640 x 480 pixels and an image acquisition speed of up to 60 frames per second.

4.4 Bottle mouth detection module:

image processing process

4.5 Test Content and Accuracy:

4.5.1 Test Content

A. Through-hole

B. Internal chip

C. External chip

D. Point chip

E. Deformed bottle neck (oval)

4.5.2 Detection Accuracy