Opal Glass bottles & jars manufacturing pioneer
SHULOPAL is the first company to bring opal glass material to kitchen storage and bathroom accessories.
Introduction
There are also 2 kinds of manufacturing processes for our opal glass jars and bottles, press-blow process and blow-blow process.
Glass furnaces
0
Porduciton lines
0
Daily production by pieces
209000
Number of workers
89
How to make Opal Glass Bottles & Jars Step by Step
Step#1 Raw Material
SHULOPAL opal glass, made from from natural minerals, with high-quality quartz sand as the main raw material. A systematic quality management process was implemented starting at the raw material stage to ensure high-quality products from the source.
1
Step#2 Furnace Melting
In OPAL glass container factory, we operates 2 fully electric furnaces, the raw materials are melted at temperatures exceeding 1600°C and are thoroughly mixed, which are pollution-free and have zero emissions. The total daily max material output reaches 90 tons.
2
Step#3 Material Cutting
Precisely timed scissors cut the glass material at the discharge outlet into nearly equally weighted glass droplets, which then fall by gravity through a guide chute into the mold of the row-column forming machine.
3
Step#4 Blow Process
The press-blow process is the most commonly used production method, typically suitable for wide-mouth bottles and jars. In this process, a metal plunger presses molten glass into a mold to form a preliminary blank, which is then transferred to a blow mold and reheated to the proper temperature for blowing. Air is injected to form the final shape of the mold. The blow-blow process is used to manufacture narrow-neck glass bottles. First, compressed air shapes the blank, which is then inverted 180 degrees, reheated, and air is injected again to blow the container into its final form.
4
Step#5 Washing
After molding, the bottles and jars are cleaned using a bottle-washing line.
5
Step#6 Annealing
After maintaining a uniform temperature in the annealing furnace for a certain period, the glass is slowly cooled to eliminate or reduce thermal stress caused by rapid and uneven temperature changes during production, thereby improving the product’s heat resistance and impact strength.
6
Step#7 Decoration
Heat transfer decals, shading, iridescence, metallic effects, soft
touching coating, different decoration techonoly make your products more attractive.
7
Step#8 Tempering
In the tempering kiln, the material is evenly heated for an extended period, causing the pigments and glass to fuse at high temperatures. After cooling, the colors solidify into the glass body.
8
Step#9 Finished product QC
SHULOPAL’s quality team carefully inspects the bottles and jars, sorting out any with defects such as bubbles, cracks, or deformities, which are then crushed and recycled.
9
Step#10 Packaging
Assemble and package them securely according to the customer's requirements.
10
Step#11 Pre-shipment inspection
Each order undergoes regular sampling inspections according to the specified AQL standards before shipment to ensure compliance with quality control guidelines.
11