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Top 10 Injection Molding Companies in China - chinese injection molding companie

Author:gly    Date: 2024-10-15    

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Overmolding, also referred to as insert molding, is a process in which a second material is molded over a preformed substrate or insert. The substrate can be made of various materials, such as metal, plastic, or even another molded part. Key points about overmolding include:

Most of the plastic flip top caps mould are designed with two-time ejection structure. The core is pushed out two times. The stripper plate and the ejector sleeve in the middle of the product are pushed out together to 14mm, and then the stripper plate push out continually until the flip top caps drops.

Once again Focare Mould has successfully made another two-color flip top injection mold. It is really difficult to make two-color flip top cap mold especially for 16 cavities. Especially, the diameter of two-color cap is only 20mm and the connection between two materials is so tiny. It is arduous to adjust the connection well completely for 16 cavities. In order to achieve this goal, we must not only have professional mold technology, but also have technical injection molding skill. Focare Mould has its own team in mold design, mold making and injection molding. We have two sets of two-color injection molding machines which permit us to test two-color injection molds and help to train our customers’ engineers when it is necessary.

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The unscrewing device of this cap mold is hydraulic motor. The ejecting sequence of this cap mold is to let the upper press plate open the mold first, and rely on the I-shaped block to drive the cavity slider to slide away. The mold is opened to a certain stroke, and the caps will be unscrewed by hydraulic unscrewing motor. The left and right thimble plates are performed simultaneously. The spring is pushed out of the barrel by the force of the spring, so that the product is firmly in the core part. After opening the mold, the oil cylinder pushes the rack, drives the central drive shaft, drives 4 product threaded shafts backward to disengage the product, and then relies on the 2 ejector rods on the outside of the machine, and the ejection plate pushes caps off from mold.

Each cavity of this cap mold is designed with separate inserts, so that each cavity product in the process of injection molding maintain the same injection molding pressure, clamping force and other molding conditions, so that the product quality is more stable and reliable. Moreover, the independent insert design can make the life of the mold longer. If there is any problem with the parts, the parts can be directly replaced without affecting the production schedule.

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Injection molding is a widely used manufacturing process that allows for the production of complex and precise plastic parts. Two variations of injection molding, two-shot molding and overmolding, offer unique capabilities and advantages. In this blog post, we will explore the differences between two-shot molding and overmolding, helping you understand when and how each technique is used in the manufacturing industry.

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Two-shot molding, also known as two-component molding or 2K molding, is a process that involves injecting two different materials into a single mold to produce a finished part. The two materials are typically different types of plastics or a combination of plastic and a different material, such as rubber or metal. Key points about two-shot molding include:

The general water bottles are round and sometimes take space in the bags, but these water bottles are square. If they are placed properly, they can save a lot of space inside your bag.

The plastic raw material of 5G cap is LLDPE, which has high gloss, high heat resistance and better fluidity than the general materials. In addition, the steel of mold core and cavity is S136, with a hardness of 48-52, which can better for mold life. It could be design with 12 cavities or 16 cavities, each cavity has its own independent cooling system to ensure that the products can be better shaped and cooled.

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Plastic liquor caps are different from the ones we usually use. They are not sealed by threads or barbs like plastic caps of mineral water bottles, but by oak plugs. However, the oak plugs may cause decay or cracking after long-term and long-distance transportation or weather, plastic caps are needed to keep them sealed and protect oak plugs.

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Spray cap molds are used in the molds for producing insecticide shells. They are made in accordance with the shape of the insecticide cover required. They are injection molded with plastic and processed into insecticide shell parts through various processes. The principle of the spray tank is that the liquid is pressed out of the valve by using air pressure. The liquid can be sprayed evenly. The direction and dose can be controlled. Any content can be easily put in and easy to use.

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Two-shot molding and overmolding are both valuable techniques in injection molding, offering opportunities to create complex, multi-material parts with enhanced functionality and aesthetics. Two-shot molding enables the bonding of two different materials during a sequential injection process, while overmolding involves adding a second material over a preformed substrate. Understanding the differences between these techniques will help manufacturers choose the most suitable approach for their specific applications, taking into account design requirements, material combinations, and process complexity. By leveraging the capabilities of two-shot molding and overmolding, manufacturers can achieve innovative solutions and differentiate their products in today’s competitive market.

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