Source Right Ejector Pins from China？
The best Practical Guide 2023.
If you are sourcing ejector pins in China, you will discover most of the suppliers located in Dongguan city. Dongguan has the most complete mold industrial chain, consisting of a relative mold parts market in Dalang Town and Chang’an Town of Dongguan. Because of that, I highly advise Dongguan City. 
In today’s post, I’ll cover,
1. What types of ejector pins are in the Dongguan market?
2. What are the applications for different ejector pins?
3. What are the material grades for ejector pins in the China market?
4. What different ejector pins suppliers are located in Dongguan, China?
Now, let’s discuss more details about sourcing right ejector pins in Dongguan City, step-by-step. I hope you will learn a lot from this post.
1. What types of ejector pins are in the Dongguan market?
There are 4 kinds of ejector pins:
Type 1 is 65MN, or 1.2343 ejector pins with nitriding surface treatment. Normally, this type of ejector pin is made without any heat treatment. Due to no heat treatment after rough turning, they can be ground with lower hardness, which saves a great deal of processing time. Therefore, they are the most inexpensive pins in the existing China market.
However I need to state, due to no fine grinding after heat treatment, generally speaking, their tolerance is higher. Their diameter of shaft tolerance is 0.02 ~ 0.03 mm, and their size of head tolerance is 0.2 mm.
Type 2 is hot working steel 1.2343/ SKD61 ejector pins with vacuum heat treatment. Their machining procedure is: rough turning → vacuum heat treatment → fine grinding. Generally, solidity is 48– 52 HRC.
Type 3 is hot working steel 1.2343/ SKD61 ejector pins with vacuum heat treatment and nitriding surface treatment. As a result, internal firmness can reach 48– 52 HRC and external hardness can reach 900HV. Or HSS ejector pins such as 1.3343/ SKH 51 with vacuum heat treatment 58 -62 HRC.
Type 4 is hot working steel 1.2343/ SKD61 ejector pins with vacuum heat treatment 48 -52 HRC. Or HSS ejector pins such as 1.3343/ SKH 51 with vacuum heat treatment 58 -62 HRC. Both can be processed with DLC covering. As a result, surface area firmness can reach 2000 ~ 3000HV.
2. What are the applications for different ejector pins?
- Due to different production processes, the 4 kinds of ejector pins have various functions and performances. To choose the best ejector pins for your plastic injection or die casting, please see the five pointers listed below:
- Suggestion 1: For low and low-output requirements molds with a working life of less than 100,000 shots and mold cores made by regular pre-hardened steel, we advise Type 1 ejector pins.
- Suggestion 2: For middle-output and middle requirements molds with a working life of in between 100,000 to 500,000 shots, Type 1 ejector pins are a good option.
- Suggestion 3: For high and high-output requirements molds with a working life of between 500,000 to 1,000,000 shots ， we recommend Type 3 ejector pins.
Suggestion 4: For high-precision and high requirements molds with a working life of more than 1,000,000 shots ， we suggest Type 4 ejector pins. - Suggestion 5: To please your need for special molds, think about ejector pins with DLC finishing.
Let’s expand on the subject of ejector pins with DLC finish. Compared to general ejector pins, they are extremely unique. If your molds have unique requirements such as those listed below, we recommend that you utilize DLC-coated ejector pins. - Injection circle time is short.
- Lubricating oil can’t be used, such as for medical molds.
- Gas will be created during plastic injection, such as usingraw materials that contain glass fiber resin or engineering plastics.
- Ejector pins wear out easily, such as when die casting molds or using raw materials containing glass fiber resin.
3. What are the material grades for ejector pins in the China market?
Grade 1: Initial imported steel, such as 1.2343 and 1.3343 from Groditz, Germany or SKD61 and SKH51 from DAIDO and HITACHI. As world well-known brand name steel producers, their functions and efficiency relating to plasticity, abrasion, and toughness resistance are exceptional. Their rates are much more expensive. Often steel firms do not have the requirements you need, so it will take a number of weeks for them to import.
Grade 2: Steel from famous Chinese brand name steel business such as BAOWU, SHAGANG, HBIS, Ansteel, and SHOUGANG, and so on. Their features and efficiency are not as good as original imported steel, however their steel is more affordable. On the other hand, these steel firms can offer a big stock and complete designs.
Grade 3: Steel from ordinary steel companies in China, such as Dalian DONGFEI, Hebei WENFENG, and Huangshi DAYE, and so on. If you do not have a high demand for ejector pins, this is a good choice for you to conserve product .
4. What different ejector pins suppliers are located in Dongguan, China?
World well-known brand name enterprises
MISUMI and PUNCH have a big stock and total models of basic mold parts, consisting of ejector pins. They also have their own heat treatment workshop, offer good quality materials, and supply custom-made ejector pins. Nevertheless, if you require a timely delivery time for special orders, they might not be a good choice for you. As they are big business, their working circulation is a lot more complex than other medium-sized and small business
Middle-Sized business
Middle-sized business are the primary elements of mold parts industries in Dongguan City. Some factories concentrate on basic mold parts, including ejector pins. Normally speaking, they don’t have complete stocks like MISUMI and PUNCH.
For instance, they just have partial designs of standard ejector pins. Some factories concentrate on customized ejector pins. In my viewpoint, they are far more competitive than brand enterprises, both in rate and shipment time.
Micro business.
Micro enterprises can likewise be called little workshops. They are strong in some specific locations; for instance, fine grinding threads, grinding exceptionally little ejector pins, and grinding huge conical degrees. They are small, however are really competitive in one or two processes. I think maybe this is the factor they can survive in fierce market competitors.
Summary
China is a huge maker of several kinds of ejector pins. To discover the most suitable suppliers with the best expense efficiency, you need to think about mold life, steel features, and producing processes. You can make a decision about which provider you ought to cooperate with. We are a professional mold parts producer in Dongguan, China; if you wish to buy top quality ejector pins for a good price, feel free to call us.
