Longwei is a professional manufacturer of glass bottles and lids with over 20 years of production experience.
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Longwei is a professional manufacturer of glass bottles and lids with over 20 years of production experience.
Liquid glass is measured and weighted precise by the automated control systems then drop into the forming machines(IS machines). The liquid glass is sculpted and shaped exactly according to the molds. It’s fired and processed twice in the molds, the top is shaped firstly then the body part. All shapes and sizes are possible at Longwei The furnace and machines work 24 hours a day, 7 days a week and 365 days a year. We never stop.Only shaping glass is not enough. All hot bottles need to go into the annealing machine systematically and cool down to the room temperature slowly and gradually to release stresses.After releasing stresses, the bottles are strong and durable for using.
The bottles are tested and tested over and over again by automatic machines before packing to make sure all bottles are good before shipping to the customers.Shapes,sizes,weight and strength are all need to be tested. The top is one of the most important parts that needs to be checked carefully. Bottles are also checked manually from time to time during production. If we find any bottles that are not good enough to be shipped out, we collect them together and put them into the furnace again.We have automatic packing machines and bottles are normally packed by pallets for reducing the cost and loading easily. Sometimes we pack the bottles by boxes according to customers’ requirements. No matter what packing methods we choose, we have to make sure all are safe enough for delivery.
01 Raw Material
The followings are the main materials：sand, soda ash, cullet. Glass bottles form naturally. We take responsibility for the environment by recycling cullet.
02 Melting
The temperature in the middle part of the furnace is over 1500°C and the raw materials will be melted inside. The furnaces run 24 hours per day, 365 days per year without stop.
03 Forming
The forming machine is called IS machine. One of the important parts are the molds. When the glass liquid drops into the molds, it forms based on the shape of the molds. We use two different techniques which are pressing and blowing depends on the bottle shapes.
04 Annealing/Cooling
The glass bottles are very hot when they are just made from the IS machine and the temperature needs to go down gradually to make the bottles strong and heat resistant enough. That is the function of an annealing/cooling machine.
05 Quality Control
All of our bottles will be checked automatically and manually to ensure the sizes are based on the drawing. Our QC will double check the finished products before shipping them out.
06 Package
Glass bottles will be packed by pallets or cartons. We will make sure your bottles are safe enough during delivery by either way. We’ve been working with our logistic partners for over 10 years so we can offer you the most competitive and fastest shipping service if you need help.
The first thing we do is meeting with our clients and talk through their goals on a future project.
During this meeting, feel free to communicate your ideas and ask lots of questions.
Longwei is proud of its rich experience in glass packaging industry. We’ve served over 100 baby brands across the world.
