FAQ

We accept T/T, LC payment.

40% down payment before producing and 60% balance payment before shipping.

Yes, you just provide the package design and we will produce what you want. We also have the professional designer can help you do the packaging design.

Our current products are mainly packaged in boxes.

We provide you with OEM and ODM services. We can tailor materials, colors and styles to your needs. The basic quantity will be notified to you after negotiation.

LAUNCESTON is an industry and trade integrated foreign trade company, we are specialized in mold and tool solutions, CNC machining, die casting, injection molding, etc.

Classified by launceston plastic mold
(1) Injection molding is to first add plastic to the heating barrel of the injection machine. The plastic is heated and melted. Under the push of the injection machine screw or plunger, the nozzle and the mold casting system enter the mold cavity due to physical and chemical effects. The hardening is shaped into an injection molded product.
(2) Compression molding, commonly known as press molding, is one of the methods for molding plastic parts earlier. Compression molding is to directly add plastic to an open mold cavity with a certain temperature, and then close the mold, and the plastic melts into a flowing state under the action of heat and pressure. Due to physical and chemical effects, the plastic is hardened into a plastic part having a constant shape and constant shape and size.
(3) Extrusion molding is a process in which a plastic in a viscous state is passed through a die having a specific cross-sectional shape at a high temperature and a certain pressure, and then formed into a continuous profile of a desired cross-sectional shape at a lower temperature. A molding method.
(4) Injection molding is also called casting molding. The plastic raw material is added into the preheating feeding chamber, and then the pressing column is placed in the feeding chamber to lock the mold, and the pressure is applied to the plastic through the pressing column, and the plastic is melted into a flowing state under high temperature and high pressure, and enters the cavity through the pouring system. Gradually solidified into plastic parts.
(5) Hollow molding is to fix the tubular or sheet-like blank material which is still in plasticized state by extrusion or injection into the molding die, and immediately introduces compressed air to force the material to expand and stick to the mold type. On the wall surface of the cavity, after being cooled and shaped, the mold is released, that is, a processing method of the desired hollow product is obtained.
(6) Die-casting mold The die-casting mold is also called transfer molding mold. The plastic raw material is added to the preheating feeding chamber, and then the pressure is applied to the pressing column. The plastic is melted under high temperature and high pressure, and enters the cavity through the casting system of the mold, and is gradually hardened. This molding method is called die casting molding.
Plastic molds can be divided into three categories depending on the casting system:
(1) Dashuikou mold: The runner and gate are on the parting line, and the product is demolded together when the mold is opened. The design is simple, easy to process, and the cost is low. Therefore, many people use the large nozzle system.
(2) Sluice nozzle: The runner and gate are not on the parting line, generally directly on the product, so it is necessary to design a set of nozzle parting lines. The design is more complicated and difficult to process. Generally, it depends on the product requirements. Fine water system.
(3) Hot runner mold: This type of mold structure is basically the same as the fine water nozzle. The difference is that the flow channel is in one or more constant temperature hot runner plates and hot nozzles, no cold material release, flow channel and gate. Directly on the product, so the flow channel does not need to be demoulded. This system is also called the waterless port system, which can save raw materials, is suitable for the case where the raw materials are expensive and the product requirements are high, the design and processing are difficult, and the mold cost is high.

First of all, we must first understand where the generated steam is mainly distributed. The bubbles generated by the accumulation of air in the cavity are often distributed at the portion opposite to the gate. Bubbles generated by decomposition or chemical reaction in the plastic raw material are distributed along the thickness of the plastic part. The bubbles generated by the vaporization of residual water in the plastic raw material are irregularly distributed on the entire plastic part. Gas is often produced in injection molds and may be related to the following:
1. The air stored in the casting system and the mold cavity.
2. Some raw materials contain moisture that is not removed by drying, and they are vaporized into water vapor at high temperatures.
3. Due to the high temperature during injection molding, some unstable plastics will decompose and generate gas.
4. Gases formed by volatilization or chemical reaction of certain additives in plastic raw materials.
5.At the same time, the reason for poor exhaustion is also needed to find out as soon as possible. Poor exhaust of the injection mold also causes problems for the plastic parts. The main performance is as follows:
6.In the injection molding process, the melt will replace the gas in the cavity. If the gas is not discharged in time, the melt filling will be difficult, resulting in insufficient injection volume to fill the cavity. Excessive gas removal creates high pressure in the cavity and penetrates into the interior of the plastic at a certain degree of compression, causing quality defects such as voids, pores, texture and silver streaks.
7.Due to the high compression of the gas, the temperature in the cavity rises sharply, which causes decomposition and burning of the surrounding melt, causing local carbonization and charring of the plastic part. It mainly occurs at the junction of the two melts at the gate flange. The gas is not well removed, so that the melt velocity entering each cavity is different, so flow marks and fusion marks are easily formed, and the mechanical properties of the plastic parts are lowered.

Plastic injection mold cracks are a common defect in plastic products, and the main reason is due to stress deformation. There are mainly residual stresses, external stresses, and stress deformations caused by the external environment. What should I do after cracking? The following LAUNCESTON injection mold manufacturers will introduce the causes of plastic injection mold cracks and repair measures.
1. Crack caused by residual stress
Residual stress is mainly caused by the following three conditions, namely, overfilling, demolding, and metal inserts. As a crack generated in the case of excessive filling, the prevention and treatment methods can be mainly started in the following aspects:
(1) Since the pressure loss of the sprue is small, if the crack is mainly generated near the sprue, it may be considered to use a multi-point distribution gate, a side gate and a shank gate.
(2) Under the premise of ensuring that the resin does not decompose or deteriorate, the proper increase in the resin temperature can lower the melt viscosity and improve the fluidity, and at the same time, the injection pressure can be lowered to reduce the stress.
(3) Under normal circumstances, stress is likely to occur when the mold temperature is low, and the temperature should be appropriately increased. However, when the injection speed is high, even if the mold temperature is lower, the stress can be reduced.
2. Crack caused by external stress
The external stress here is mainly due to the unreasonable design of the stress concentration, especially at the sharp corners.
3. Crack caused by external environment
Chemicals, water degradation due to moisture absorption, and excessive use of recycled materials can degrade physical properties and cause cracks.
4. How to deal with the injection mold after cracking
(1) Annealing treatment. After the part is molded, it is subjected to heat treatment for a period of time, and the heating device may be a hot air blower, or a crucible furnace or a constant temperature water. The annealing temperature can be selected from the drying temperature of the raw material, and the annealing time depends on the degree of cracking.
(2) Soaking in tap water at room temperature. After the part is out of the mold, it is put into the water tray to soak and cool. The greater the degree of cracking, the longer the soaking time, and the longer it takes more than 24 hours. The length of the soaking time depends on the degree of cracking of the part.
This is a practical control method often used in most factories, but this method also has certain limitations, such as easy to damage the product, so be careful when handling, or the product should be fully dry for post-processing, such as pad printing, spraying, Plating, etc.

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