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Hello, very welcome you to pay attention to Huaji mold.
We are a mold manufacturing and design company focused on serving global customers, with more than 15 years of global mold manufacturing experience.
Committed to providing customers with quality service experience!
Plastic chair mould
Chair type chair, armchair, armchair, PC art chair, children's chair...
Core and section steel p20,718h,S136, H13
Delivery time 45-55 days
Mold runner system hot runner
Suitable for 650t-1150t
Hello, very welcome you to pay attention to Huaji mold.
We are a mold manufacturing and design company focused on serving global customers, with more than 15 years of global mold manufacturing experience.
Committed to providing customers with quality service experience!
Plastic chair mould
Chair type chair, armchair, armchair, PC art chair, children's chair...
Core and section steel p20,718h,S136, H13
Delivery time 45-55 days
Mold runner system hot runner
Suitable for 650t-1150t
chair mould quality points:
chair mould running cycle time.
chair mould run shorts guarantee.
the parting line finishing is good or not, if there is any sharp edges?
the wall thickness is even or not.
how they can make the chair mould with less weight but strong enough?
how about the stackable?
how to make the air venting on the backrest?
how to keep your chair mould finishing long lasting?
...
chair mould quality points answer:
Can you tell your chair mould running cycle time?
If the cooling water temperature is from 8 to 12 centigrade degree, if the chair weight from 1700g to 2400g, the cycle time should be 35s to 50s. If the machine plastic melt and injection is with accumulators. Please check how they make the cooling channel? If the cooling channel is extra in and out? If the cooling channel is one according with the chair shape?
How you guarantee your chair mould run shorts?
Many people will say that they will have one millions guaranteed. But God now how can they guarantee. The guarantee for a mould run 1 million shorts without any flashes? Because if you accept to cut the flash by your workers heavy labor, I think you can use this mould for 10 millions shorts. So you need to check the steel hardness, and in the mould if there is any parting area were welded. Normally the steel hardness should be HRC33.
How you make the parting line finishing is good, if there will is any sharp edges?
Sharp edge on the chair is dangerous, in order to avoid the sharp edge, we have to do many points during the chair mould manufacturing.
- chair mould parting design is correct or not.
- the chair mould cavity and core thickness is enough or not.
- how you make the CNC milling the cavity and core? One stage finishing or several stage finishing? Normally, we need 3 stages finishing. From rough milling to steel hardened, after hardening, take the 2nd stage milling, we call it half precise milling, normally we leave 0.3mm, Then make the steel stress releasing, after this we do final precise milling. When in this time, the machining operation is very important. 1. we have to use cooling on the milling area. 2. we have to be sure that each cutting, the depth will not bigger then 0.08mm. All these are because of the steel will be deformed when milling and after the hardening. The deforming will cause the cavity and core's fitting are not accurate, there will be a lot of hand works on it. By hand works on the parting area, you can never work out a perfect parting line.
the wall thickness is even or not.
Hand working on the parting line also be one of the reason for wall thickness is not even. Of course, most of the reason is from the plastic chair 3D design and poor polishing on the cavities and cores. So when we start a plastic chair design, we have to consider the wall thickness. Some time, we need to make some area a little thicker to be sure that the chair is strong enough. But we have to consider seriously when it is need. As because the uneven thick will caused the injection not balanced and also will caused the cooling time not even. This will effect the injection speed slow down and also will caused the shrinkage marks. If the CNC milling is too rough, you can never get a chair with thickness even.
how about the stackable?
When the chair plastic design are doing, we have to check its stackability. And you also need to consider the deform possibility of the chair moulding.
how you can make the chair mould with less weight but strong enough?
When starting make the plastic chair design, we have to consider the weight and the strength. You can make the bottom area be strong enough by add more ribs. But how about the leg, backrest and armrest area? For this reason, you need to calculate or analyze the force of each area…in order to make a light chair strong enough, you can choose a very low MFI PP material. But in this way, you need to make the mould very strong and also you need to be sure the injection filling are available, as because you are using a material with MFI 4 or Max. 6.
What about the vents on the back of the chair?
For some chair backs, the design is very complex, there are many material seam lines, and some air cannot be discharged when the material is filled and flowing. Therefore, you may need to analyze by mold flow, and there are many areas where ventilation needs to be established in the chair mold.
How to make your chair mold last?
In order for your chair mold cavity and core not to rust from plastic materials, you need to make sure that the steel is high chromium and has a hardness greater than HRC33. If you will be using some recycled material for injection, you will need your chair mold to be hard chrome plated. Otherwise, you need to polish it from time to time.
Huajimao is a leading chair mold manufacturer in China and has developed more than 300 sets of chair molds over the years. We also specialize in PC transparent chair mold gas injection. If you need a high-speed, long time, beautiful chair mold, please come to us. We're sure you'll be satisfied.
Chair mould, plastic chair mould, China chair mould manufacturer, baby chair mould, office chair mould.
chair mould quality points:
chair mould running cycle time.
chair mould run shorts guarantee.
the parting line finishing is good or not, if there is any sharp edges?
the wall thickness is even or not.
how they can make the chair mould with less weight but strong enough?
how about the stackable?
how to make the air venting on the backrest?
how to keep your chair mould finishing long lasting?
...
chair mould quality points answer:
Can you tell your chair mould running cycle time?
If the cooling water temperature is from 8 to 12 centigrade degree, if the chair weight from 1700g to 2400g, the cycle time should be 35s to 50s. If the machine plastic melt and injection is with accumulators. Please check how they make the cooling channel? If the cooling channel is extra in and out? If the cooling channel is one according with the chair shape?
How you guarantee your chair mould run shorts?
Many people will say that they will have one millions guaranteed. But God now how can they guarantee. The guarantee for a mould run 1 million shorts without any flashes? Because if you accept to cut the flash by your workers heavy labor, I think you can use this mould for 10 millions shorts. So you need to check the steel hardness, and in the mould if there is any parting area were welded. Normally the steel hardness should be HRC33.
How you make the parting line finishing is good, if there will is any sharp edges?
Sharp edge on the chair is dangerous, in order to avoid the sharp edge, we have to do many points during the chair mould manufacturing.
- chair mould parting design is correct or not.
- the chair mould cavity and core thickness is enough or not.
- how you make the CNC milling the cavity and core? One stage finishing or several stage finishing? Normally, we need 3 stages finishing. From rough milling to steel hardened, after hardening, take the 2nd stage milling, we call it half precise milling, normally we leave 0.3mm, Then make the steel stress releasing, after this we do final precise milling. When in this time, the machining operation is very important. 1. we have to use cooling on the milling area. 2. we have to be sure that each cutting, the depth will not bigger then 0.08mm. All these are because of the steel will be deformed when milling and after the hardening. The deforming will cause the cavity and core's fitting are not accurate, there will be a lot of hand works on it. By hand works on the parting area, you can never work out a perfect parting line.
the wall thickness is even or not.
Hand working on the parting line also be one of the reason for wall thickness is not even. Of course, most of the reason is from the plastic chair 3D design and poor polishing on the cavities and cores. So when we start a plastic chair design, we have to consider the wall thickness. Some time, we need to make some area a little thicker to be sure that the chair is strong enough. But we have to consider seriously when it is need. As because the uneven thick will caused the injection not balanced and also will caused the cooling time not even. This will effect the injection speed slow down and also will caused the shrinkage marks. If the CNC milling is too rough, you can never get a chair with thickness even.
how about the stackable?
When the chair plastic design are doing, we have to check its stackability. And you also need to consider the deform possibility of the chair moulding.
how you can make the chair mould with less weight but strong enough?
When starting make the plastic chair design, we have to consider the weight and the strength. You can make the bottom area be strong enough by add more ribs. But how about the leg, backrest and armrest area? For this reason, you need to calculate or analyze the force of each area…in order to make a light chair strong enough, you can choose a very low MFI PP material. But in this way, you need to make the mould very strong and also you need to be sure the injection filling are available, as because you are using a material with MFI 4 or Max. 6.
What about the vents on the back of the chair?
For some chair backs, the design is very complex, there are many material seam lines, and some air cannot be discharged when the material is filled and flowing. Therefore, you may need to analyze by mold flow, and there are many areas where ventilation needs to be established in the chair mold.
How to make your chair mold last?
In order for your chair mold cavity and core not to rust from plastic materials, you need to make sure that the steel is high chromium and has a hardness greater than HRC33. If you will be using some recycled material for injection, you will need your chair mold to be hard chrome plated. Otherwise, you need to polish it from time to time.
Huajimao is a leading chair mold manufacturer in China and has developed more than 300 sets of chair molds over the years. We also specialize in PC transparent chair mold gas injection. If you need a high-speed, long time, beautiful chair mold, please come to us. We're sure you'll be satisfied.
Chair mould, plastic chair mould, China chair mould manufacturer, baby chair mould, office chair mould.
