Plastic manufacturers have been developing and innovating different types of spray pumps since 1945. It has allowed commercial and domestic purposes to be stored in containers. In the successive years, the trigger spray pumps were developed and have been innovated with aesthetic design and styles in different color variations. More so, every innovation comes with a new safety feature.

Manufacturing Process of Trigger Sprayers

There are several manufacturing processes in molding plastic containers for Foaming Trigger Sprayer manufacturers. Below, we have provided a brief explanation for each process.

Before we begin, here is the list of the materials needed for the manufacturing process of trigger sprayers.

Polyethylene Terephthalate

High-Density Polyethylene

Low-Density Polyethylene

Polystyrene

(1) Injection *** Moulding

Hollow plastic objects underwent the manufacturing process of injection *** moulding. The process has three significant stages. At the first stage, a preformed parison is made through injecting melted plastic into the mold cavity. The produced preform will look similarly to a test tube with a molded *** finish on its top.

On the second stage of ***-molding, air is introduced through a core pin to expand the preform against a cold mold cavity. After this, the preform parison is transferred to the third step for ejection.

There are two main types of injection *** moulding:

One-step injection moulding – a melted polymer is introduced into the final shape of the container then released.

Two-step injection moulding – unlike the usual injection *** moulding process, after the preform parison is made, it is transferred into another machine. It is then enclosed in a mold, heated, and then stretched until its desired length. After which, the mold is blown and given shape.

(2) Injection Moulding

Plastic containers that undergo injection moulding can have wide or narrow mouths, straight or tapered sides. The materials used in this process are injected into the cavity. It will provide pressure that will conform to the mold body. These plastic containers can hold tighter dimensional tolerance and provide uniform wall distribution. Most injection moulding processes use different variations of resins, and the most popular kinds are polyethylene, polypropylene, and styrene.

(3) Extrusion *** Moulding

An extruder performs the extrusion *** moulding to create a round, hollow tube or parison. Its mold cavity is made out of two halves that closes around the parison and pinches off the other end. More so, the cold cavity inside the parison is conformed by the compressed air by expanding the parsion.

When the mould is completely cool, the container is opened and removed. It is expected that the plastic container may have excess plastic or flash on its side, trim the excess. A flash is a common characteristic of parisons made from extrusion *** moulding. More so, the excess flash or resins can be reprocessed. Thus, it will not be wasted.

The method of extrusion *** moulding aids in enhancing the performance of the container and reducing the weight of the container and cost.

(4) Stretch *** Moulding

In this manufacturing process, it either uses the extrusion or injection *** moulding method as its basic foundation. In whichever method, a preform parison is molded and then transferred to a *** moulding cavity.

During the *** moulding process, the parison is stretched in a biaxial direction to orient and align the molecules. The orientation will improve the barriers, stiffness, strength, and transparency of the container. As a result, the resins can be stretched and the weight of the containers can be reduced.

(5) Co-Extrusion

Co-extrusion is also known as the multi-layer bottles method. It is the newest manufacturing technology that bonds various plastic resins together with tie layers to produce durable bottles. These bottles are expected to have heat-stable qualities and barriers that can cater a hot-filled product.

With its heat tolerant features there are different sections to look at. The central layer of the bottle is made out of EVOH, while the inner and outer walls are polypropylene and polyethylene. However, the hot-filled caused the side walls to draw in.Thus, it needs to be compensated with an aesthetic design to make it look more elegant.

(6) Mechanism of the Trigger Pump

Most trigger sprayer pumps have straightforward designs that ensure the pumping action will efficiently deliver the liquid in the spray. By only a few finger movements, the trigger lever easily activates the small pump. Meanwhile, these pumps are installed to a plastic tubing that draws the fluid from the bottom of the container.

Inside the shroud, a small spring compresses the fluid. Meanwhile, the moving piston compresses the spring. Moreover, once the trigger pump is released, process repetition is convenient.

We offer all kinds of cosmetic packaging, such as Small Drinking Water Pump, please consult us if you have any questions.