Some Guidelines to Follow for the Disassembly of Plastic Injection Mould

If you demand long-life plastic injection moulds, it is insufficient if you only requires good mould from mold supplier; the life of the mold have great relationship with normal operation and maintenance, so a mature molding company usually have plastic mold engineer, who will responsible for mould repairing and maintenance; of course, plastic molds disassembly is a basic work in mold maintenance.

Do you know how to disassemble plastic molds? And what you should pay attention in moulds disassembly? When you disassemble theplastic moulds, you need to pay attention to following matters.

·         It is necessary to print the mould assembly drawings, clear up each of the parts in the plastic molds and the principle of operation as well as the assembly relationships.

·         According to the parts list on the assembly drawing, preparing the necessary disassembly tools.

·         Analysis the plastic injection moulds, learn the injection type, such as normal hot runner, valve gate or cold runner, and check the parting line and ejector system. Make a disassembly order list before do it.

·         When you disassemble the plastic molds, placing the mould on rubber mat or low hardness plane workbench. Parting surface to be parallel with the table; that means guide pin should perpendicular to the workbench. It can protect the mould parts, such as ejector pin, if the mould is not in correct direction, small pin will be easy to be bend.

·         Usually, you need to separated the cavity and core, and disassemble plastic injection moulds from back side, it means start disassembling from the ejection and injection systems.

·         If you don’t know about the mould well, you need to mark all the removed parts, and put in sequential, it will be convenient for installation and it can avoid mistake when you assembling the mould.

·         Tools to be used correctly make the force balance when you rotating or beating, don’t forcibly disassemble the undetectable parts.

·         If the tool needs to reach to cavity or core surface, be sure to use less hardness tool than the core cavity, usually, we suggest copper.

If you don’t have any mould engineer in your company, it is not rational to do plastic molds disassembly without any technical support. We suggest you send plastic injection moulds to local mould workshop, or do the plastic molds disassembly under guidance of mould manufacture.

A Brief Description on How to Custom Mould Efficiently and Successfully

If you want to get a good custom mold, many inexperienced customers normally like to find some professional mould manufacturers. But even if you find a good mould maker, you can’t express your needs well or you can’t have a good communication with the company, that’s also can cause bad results. So custom mould is also need some skills.

How to custom mold successfully? What’s problems will appear when custom mould? In custom mould process, which content must be discussed clearly? 

We will offer you a chair mould case to explain how to custom a good chair molds successfully, and what’s problems we can avoid on custom mold project.

Product:

If you want to custom a good mould, firstly, we need to know the product clearly. Such like whether the mould design is reasonable, whether the product on market can bring the profits, etc. How to save cost on the same product, for example, we can make the mould size smaller, use a smaller machine to manufacturing or the mould can use hot runner system to reduce the material cost and shorten the cycle time, etc. For plastic chair, the most important except the style, we also need to consider the chair strength, stacking condition, flash and the design is reasonable or not.

Mould design

Mold design rationality, will bring us great return benefit. Many times, we are wasting money on the mould because of the lack experience. 

The below information is the key point that we need to treat very seriously:

1.      Mould structure the simple the better

Because, for the simple mould, there will be less rub during the mould operation, then the mould life will be longer. When take chair mold as an example, some customers think the more interchangeable back inserts the better, and it will be excellent if all the chair back inserts and sit inserts can be interchangeable. However, that will make mould testing very complicated, and you will have a lot of trouble in your future mass production.

2.      High requirements for cooling system

High quality cooling system design can help you a lot on shorten the cycle time that obviously brings directly benefit and effective to the customer. Simpler and better than you hire a wise operating engineer.

3. The injection gate chooses!

Sometimes it will cause many problems from ignoring the injection forming on design, it is not good if only considered about the surface while not the mould. As we know if the mould with hot runner system, it without the waste material and improve the injection cycle time, but in order to reduce the cost that we will use the recycle material, while it with much impurity is not good for the hot runner. For chair mould, if adopt the famous brand such as YUDO, it’s a waste of the cost. If adopt the common hot runner system, they may not solve the problem, so even if they used the filter, also can not ensure the quality is 100%. In this way, we can choose the cold runner system, if design well for the injection gate location, it is easy to break off the tail and not leave the marks.

Machine selection

To custom mold is not only related to injection molds, actually injection molding machine selection is also a key point of a customized mould.

If you have enough budgets, please consider to choose a greater tonnage machine. A great tonnage machine will have stronger clamping force, it is very easy to solve the flash problem. If you are not able to choose a big machine, definitely you may face a lot of problem during long term manufacturing.

In order to avoid such problems happen, customer have to provide the mould making company detailed machine parameters.

This is our decades experience for clients’ customize mould, if you have more experience and better suggestion please contact us for exchange ideas and mutual-improvement. Sino Mould Co., Ltd one of the biggest mould company and a professional mold custom factory.

How to custom molds and establish plastic molding production line

When you want to built a new factory for plastic molding production , or you want to join the plastic product manufacture ,the potential investment ,you should considered the following two points.

1.      The product we focused on has the good market and you have already got the client resources? 

2.      How to reduce the risk when you just start the investment and you don’t know the money you put will back or not.

For the first point, it is easy for you to get the answer .You only need to do the market investigate and do some promotion.

For the second one, you should prepare many things .Such as,

Design plastic product, find out the good supplier for the molds to design the mould and make the mould, find the suitable equipments you need for the plastic molding production line, get the factory, find the engineer who can help you to built the factory and function the equipments with good conditions ….

Maybe the biggest problem you will meet is H0W TO CUSTOM MOLDS and HOW TO ESTABLISH THE PLASTIC MOLDING PRODUCTION LINE by yourself.

To CUSTOM MOLDS,

You should be professional in molds, injection, design … it is not easy.

However, you can find a good CUSTOM MOLDS company or CUSTOM MOLDS manufacture to help you to solve this headache problem.

You can show them the sample and they will finish the following steps for you:

Quote the cost, design the product, do the mould design, make the molds, test the molds, send you the testing sample, ship it to you the molds.

What’s more, you should start to find the equipments for the production line before the mould shipped to you.

All the professional CUSTOM MOLDS Company will need the equipments information; so that they can design the molds according to the equipments you have and help you to reduce the cost in production.

Then, you should prepare the equipments for the plastic molding production line in your factory.

Many types of equipment you should buy for a molding production line:

1.      injection machine

2.      Auxiliary equipments for plastic molding ,such as autoloader ,chiller ,mold temperature controller ,crusher ,cooling tower ,dryer …

3.      Robot, maybe you want a fully automatic production line, the robot is necessary.

4.      Factory devices, for example, drive, water system, electricity system, the store, the drainage system and so on.

If you don't have any experience in this field and you need the TURN KEY PROJECT SERVICE, maybe you can find a professional plastic molding company in China.

We can recommend you a company who can offer MOLDS CUSTOM, PRODUCTION LINE TUREN KEY SERVICE manufacture in China, named SINO HOLDINGS GROUP.

Finally, hope all of you will have a bright business in the year 2013.

How to Choose Best Quality Plastic Injection Mould

There are plenty of injection Mold Company in China, especially gathered in Guangdong province and Zhejiang province. Then how to customize good quality plastic injection mold? How to choose most suitable mold company?

Mold flow analysis

Before detail mold design, should have mold flow analysis of plastic part. By analyzing material flow direction and path route, check whether injection gate reasonable or not, or there is any flowing imbalance or other problems.

  

Professional mold design

Mold design is the basic, also it is the first important item for mold manufacturing. It must be reasonable, based on exact plastic part’s requirement, then to have the most appropriate design. For example, PVC injection molding, if plastic part small, better to use valve gate system or submarine gate. For large PVC part with thick wall, then better to use fan-shaped gate type.

Mold tooling

Good quality injection mold related to precision mold tooling. For example, medical syringe barrel mold, it has strictly requirement of mold core part’s verticality, almost there is no demolding angle, as require sealing the best between barrel and gasket. Here best to use Japanese brand Sodick precision wire cutting machine, mold dimension can be controlled within 0.005mm. Additional, Fidia three axis high speed CNC machine from Italy, Agie Charmilles EDM machine from Switzerland, are most suitable for tooling high precision injection mold for medical parts, packaging parts and automotive parts. When you hesitate to choose which mold company, to check their tooling equipments first.

Mold installation

After all above items smooth finished, then comes to labor works. Mold assembling and installation should be done carefully, workers should pay attention to this part, make sure every spare part has been assembled and in most suited location without any damage. Also make sure under safety condition.

Mold adjusting and testing

If injection mold have any problem, then it can be directly reflected on plastic parts. Mold testing is important, as custom mold company and client will have fully understand, then know how to fix the mold or next. So at first, all related auxiliary equipments should be well installed, like air blow system, water cooling system, etc. Check its reliability, then add plastic material to test the mold. At the same time, injection molding condition should be suitable.

Mold maintenance

Suitable maintenance of injection mold is important. This will prolong mold life time, also you may have the idea of this injection molds company, how their attitude of the mold manufacturing.