Dimensional stability problems occur when a part is inconsistent in part size or in part weig from shot to shor. Parts that are underweight can suffer in structural integrity; overweight parts can also suffer from structural integrity due to molded-in stresses and increased part costs. List causes and solutions for dimensional stability of workpieces
Causes:
1. When injection pressure transfers on time or hydraulic pressure, workpiece weight and size can vary since any change in hydraulic pressure can cause too little material to fill one shot and too much material the next. Transfer due to screw position is found to provide improved object weight and dimensional stability
2. Undersized nozzle or sprue size can restrict the amount of material that enters through the gate and into the cavity
3. Too short a closed mold time will cause the part to underpack and shrink more
4. High mold temperatures can result in too small parts. This can be noticed even more in semicrystalline materials such as polyethylene and polypropylene
Solutions:
(1)The screw position can be set to fill the cavity about 95%, and then the remaining 5% can be filled on hold pressure.
(2) The pack pressure is increased to fill the cavity with sufficient material, the injection forward time is increased, and the fill time to force more material into the cavity faster is also increased.
(3)The cushion is examined visually to verify if it is consistent. If variations can be seen, adjustments to shot size and back pressure can be made to improve cushion consistency.
(4)A won check ring can also cause cushion variation. This can be noticed by observing the screw position after moving forward. If the screw shows some rotation after the screw has moved fully forward at the end of its stroke, this indicates a won check ring. Replace the check ring if this condition is seen.
(5)Increasing melt temperature within the recommended temperature range will allow the melt to pack out the cavity more than at lower melt temperatures, resulting in increased part size
Place of Origin:Zhejiang, China (Mainland)
Model Number:Customized
Shaping Mode:Plastic Injection Mould
Product Material:Steel
In order to meet the demand of outer looking auto grille mould, Tuofang Mould always active in improving the technology in automotive grille mould. 1. Structure of inner departing surface: we can master the structure and set the departing line on the non-exterior surface to be ejected, so it...
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Place of Origin:Zhejiang, China (Mainland)
Model Number:Customized
Shaping Mode:Plastic Injection Mould
Product Material:Steel
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The following five major elements are indispensable in the processing of double-shot moulding:1.Mold evaluation and product analysisBefore mold design, mold evaluation and product analysis is a must including the appearance, size and shape to avoid unnecessary complication for two-color mold design.
Tuofang company is manufacturing high quality plastic injection mold like car radiator tank, mask grille, engine coolant tank, fan and fan shroud, car interior part, car rear view mirror.
Place of Origin:Zhejiang, China (Mainland)
Model Number:Customized
Shaping Mode:Plastic Injection Mould
Product Material:Steel
The door is an important part of the auto interior parts . It is located on the inside of the car door. It is divided into front, rear, left, and right. It varies according to the car system, usually two doors and four doors. These parts are collectively called door panel series. The vehicle...
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Mold Try Out For Automotive Inlet Tank Mold First, Matters needing attention before mold trial 1. Understand the relevant information of the mold: It is best to obtain the design drawing of the mold, analyze it in detail, and ask a mold technician to participate in the trial work. 2. First check...
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We specialize in making injection mould, such as auto part mould, radiator tank mold, motorcycle parts mold and commodity molds etc.
We are professional in making kinds of auto parts mould. Such as car radiator water tank mould, fan and fan shroud mould, auto interior part mould, grille mould, ,fender mould, car light mould, car rear view mirror etc .
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The door is an important part of the auto interior parts. It is located on the inside of the car door. It is divided into front, rear, left, and right. It varies according to the car system, usually two doors and four doors. These parts are collectively called door panel series.
Our company manufacturing high quality plastic injection mold like car radiator tank, mask grille, engine coolant tank, fan and fan shroud, car interior part, car rear view mirror
Our company manufacturing high quality plastic injection mold like car radiator tank, mask grille, engine coolant tank, fan and fan shroud, car interior part, car rear view mirror.
Auto Lamp Mould Car light housing Plastic Injection Mold1+1 Cavities for Rear Lamps
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The surface treatment of plastic mould Mould surface treatment is systematic engineering to change the morphology, chemical composition, structure, and stress state of die surface by surface coating, surface modification, or composite treatment technology to obtain the required surface...
General car parts (such as car fenders, door handles, rearview mirrors, etc.), the surface will be painted or electroplated, so the surface treatment of the mold is also very important.If these parts are made into molds, you need to pay attention to:
Place of Origin:Zhejiang, China (Mainland)
Model Number:Customized
Shaping Mode:Plastic Injection Mould
Product Material:Steel
high quality customerized plastic injection mould We provide all kinds of plastic injection mould. Automotive mould, household product mould, industry product mould ect.
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Mould Design for Car Fog Lamp Hood injection Mould We have highly skilled software, including the latest tools in CAD-CAM, Unigraphics and Pro / Engineer wildfire, by providing them with simulations and alternatives for the development of alternative products with great practical application for...
Our company manufacturing high quality plastic injection mold like car radiator tank, mask grille, engine coolant tank, fan and fan shroud, car interior part, car rear view mirror.
Our company manufacturing high quality plastic injection mold like car radiator tank, mask grille, engine coolant tank, fan and fan shroud, car interior part, car rear view mirror.
We are professional in making kinds of auto parts mould. Such as car radiator water tank mould, fan and fan shroud mould, auto interior part mould, grille mould, ,fender mould, car light mould, car rear view mirror etc.
Our company manufacturing high quality plastic injection mold like car radiator tank, mask grille, engine coolant tank, fan and fan shroud, car interior part, car rear view mirror.
Place of Origin:Zhejiang, China (Mainland)
Model Number:Customized
Shaping Mode:Plastic Injection Mould
Product Material:Steel
We are professional in making kinds of auto parts mould. Such as car radiator water tank mould, fan and fan shroud mould, auto interior part mould, grille mould, ,fender mould, car light mould, car rear view mirror etc.
Place of Origin:Zhejiang, China (Mainland)
Model Number:Customized
Shaping Mode:Plastic Injection Mould
Product Material:Steel
Our company manufacturing high quality plastic injection mold like car radiator tank, mask grille, engine coolant tank, fan and fan shroud, car interior part, car rear view mirror.
Our company manufacturing high quality plastic injection mold like car radiator tank, mask grille, engine coolant tank, fan and fan shroud, car interior part, car rear view mirror
Place of Origin:Zhejiang, China (Mainland)
Model Number:Customized
Shaping Mode:Plastic Injection Mould
Product Material:Steel
Place of Origin:Zhejiang, China (Mainland)
Model Number:Customized
Shaping Mode:Plastic Injection Mould
Product Material:Steel
We are professional in making kinds of auto parts mould. Such as car radiator water tank mould, fan and fan shroud mould, auto interior part mould, grille mould, ,fender mould, car light mould, car rear view mirror etc.
Place of Origin:Zhejiang, China (Mainland)
Model Number:Customized
Shaping Mode:Plastic Injection Mould
Product Material:Steel
Taizhou Tuofang Plastic Mould Co.,Ltd has been focus on plastic injection mold and molding service ever since its foundation. We have professional engineering and sales team.
This truck radiator tank mould is with ten interchangeable insert to make ten diffirent type water tank
Our company manufacturing high quality plastic injection mold like car radiator tank, mask grille, engine coolant tank, fan and fan shroud, car interior part, car rear view mirror.
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Tuofang company is specialized in designing and manufacturing Plastic Injection.
No. 71 Hequ Road, Chengjiang Street of Huangyan, Taizhou City, 318020, Zhejiang Province, China
