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Plastic Insert Mold
Using the combination of resin insulation and metal conductivity particularly, the molded parts can meet the basic functions of electrical products. The pre-molding combination of multiple inserts makes the post-engineering of product unit combination more rational. Insert products are not limited to metals, but also cloth, paper, wires, plastics, glass, wood, coils, electrical parts, etc.
The Main Issues for plastic insert moulding
1. Flash: it will have flashes where the radius of insert sealing area, the radius is not accuracy like the drawing after insert bent, it causes flashes on assembling gap area, the other one will be in the big threaded hole;
2. The plastic with insert fit is not enough, the insert will be injected with plastic together and will cause the connection not good, then the part surface and function defects, we could improve this issue by adding connection place for plastic and insert.
3. The complex issue is deformation, the plastic will be cooler after contacting with insert, but it will cause pressure is not the same and influence part deformation, due to the insert can not shrink, it will need to make different ways to solve it, we normally consider that the plastic with insert fit whether it is enough, then check the cooling gate layout whether it is ok because the different temperature will also cause the shrink. Another way will be to change the material to test and modify the injection gate and quantity. the first 2 solutions are modified on mold, and the last 2 solutions are from initial which are more useful but the testing cost is very high.
As one of the most professional injection moulding manufacturers, we provide threaded inserts for plastic molding, plastic moulding services, Insert injection molding and etc. For more information, please feel free to contact us!
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Plastic Switch Mould
Most of the smart home appliance products are electrical products and need to be connected with strong and weak electricity, most of the inner and outer shells are made by PC+ABS, ABS, and PC materials in V0 class because fireproof materials are highly corrosive, and the mold steel needs anti-corrosion mirror mold steel.
As one of the most professional injection molding manufacturers, we provide plastic switch mould,, light switch cover mold, light switch mold, plastic moulding services, Overmolding and etc. For more information, please feel free to contact us!
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Pre-Deformation Mold
When the plastic material rushes into the mold cavity, it loses heat due to heat conduction, and the melted plastic will freeze and solidify, therefore, for complex or large products, high mold temperature is usually used for filling, the purpose is to reduce the injection molding conditions, the stress is also conducive to debugging product deformation and shrinkage. However, high mold temperature will produce excessive oil stains, and molds with poor precision are prone to burrs.
PRE-DEFORMATION MOLD TYPES
Automotive Window Frame Mould
USM has 15 years of experience in pre deformation mold designing, From the mold flow analysis to get theoretical deformation amount, and then make Crim's test by UDB material file which used to obtain the actual deformation amount, then leave enough space for steel when mold design according to professional experience in order to shorten the modification time and longer mold life.
Water Tank Mould
The mold will be made welding process many times during modification, but it will reduce the accuracy and mold life a lot. some factories might use the normal steel to make manufacturing and then make real mold manufacturing after the first prototype mold work well, but it also influences the mold cost and delivery time.
Air Chamber Mold
With over 15 years of pre-deformed mold, USM Mold has mastered scientific and complete pre-deformation mold technology, from project management, mold flow analysis, design, manufacturing, assembling, mold trial, and final measurement.
PA66 GF30 Car Parts Plastic Injection Mold
Pre-deformation means that the product will be designed mold in opposite direction in advance. The product is injected and cooled by natural shrinkage, the two deformations will be offset to obtain a product and meet the drafting tolerance.
Car Door Mold
The product is an assembly functional part with very high requirements for size and installation location, and it is an external part, there are very strict requirements on the clearance and tolerance after installation;
Automotive Fan Mould
The common products used to be water chambers, air chambers, engine inlet valve pipe and nylon connectors, and automotive AC systems: fan covers, fans, automotive brackets, sunroofs, mirror triangle brackets, automotive bottom sheets, and so on.
The main reasons to cause the plastic parts are warpage and deformation
1. The uneven wall thickness of each part of the plastic product deforms.
Usually, the main part of the product is thicker and the ribs are thin, when the plastic parts are cooled, there are still uncondensed parts in the middle of the main body after the ribs are completely cooled, the continued cooling of the main body will inevitably cause the plastic parts to deform in the opposite direction to the ribs.
2. Uneven cooling of the mold cavity and core causes deformation. In the injection molding process of plastic products, if the temperature of the mold cavity core is inconsistent, it will also cause product deformation, the usual situation is that the side with high-temperature shrinks, and the deformation is also warped to the side with high temperature.
3. Various stress at part angles are deformed. One is that the wall thickness at the angle is thicker, and it is generally cooled at the end; the other is that the molecules in the corner are elongated during injection molding of the plastic part, these two factors will cause product deformation.
4. The plastic part deforms when it is ejected. When the plastic parts are formed, the shrinkage of the product will produce a larger holding force, especially for deep cavity parts, when the plastic part is ejected, because the plastic part is not completely cooled, if the external force on the ejection exceeds the elastic limit of the plastic part, it will cause the product to deform in the ejecting direction.
5. The imbalance of the product's filling feeding leads to inconsistent internal stress of the product, choose the right gates numbers, but also pay attention to the balance of each gate and the shape and position of each gate.
The influence of injection molding process parameters on deformation
1. Mold temperature:
When the temperature of the mold cavity and core side is very different, it will cause the mold to freeze and not open, the higher the mold temperature, the bigger the shrinkage and the greater the deformation, the temperature difference between the inner and outer surfaces of the product will cause thermal stress and thermal deformation, and the inconsistent temperature of different areas of the mold will cause uneven shrinkage of the product and warp deformation.
2. Melt temperature:
Low melt temperature is not conducive to injection molding, the decrease in melt viscosity will increase the cooling rate of the melt, lead to poor plasticization of the melt and increase the difficulty of the process; high melt temperature is good for molding, which can reduce the viscosity of the melt and reduce the orientation stress, but it cannot too high which will cause thermal degradation.
3. Injection pressure:
Injection pressure is to overcome the existence of resistance, in injection molding, the appropriate injection pressure should be suitable, and the standard is the filling will be the same after the speed is added. High injection pressure will influence the stress pressure for melt plastic during injection, so the smaller injection pressure is, the better for protecting the mold and equipment, but if it is too small which will cause unfull filling.
4. Holding time:
The holding time has a big effect on the size and elastic deformation of the product, when the melt is injected from the screw into the mold cavity, it will contract cold, the function of holding pressure is to make up for the space left by the injection.
The holding time is to ensure that there are no quality issues such as shrinkage marks on the part surface and reduce the holding pressure as much as possible, excessive holding pressure will increase the internal stress caused by the solution on the mold cavity and the product.
5. Holding pressure:
Excessive holding pressure causes excessive internal stress of the product, resulting in product stress cracking and burrs, too small holding pressure will cause product shrinkage, and the holding pressure controls the amount of material fed.
It has a big effect on the shrinkage and deformation of the product, mainly to make up for the remaining mold cavity space during injection filling.
6. Injection speed:
Multi-stage injection speed should be used: slow-fast-slow, the injection speed is fast, the heat of the melt can be maintained, the viscosity will be reduced, and it can flow farther, but if the injection speed is too fast, the gas in the column cavity will not be discharged.
7. Injection position:
In the case of normal process parameters, the injection position is filled to 90% of the product and then transferred to holding pressure, it is not unrelated to the shrinkage of the product and the warpage deformation, under unusual circumstances, it may be due to improper parameter adjustment, too much material causes warping and deformation.
8. Cooling time:
The cooling time is insufficient, when the product is demolded, the thrust generated by the ejector pin acts on the surface that is not cold-solidified, which causes the product to deform. If the cooling time is too long, the hot melt is injected into the cold mold cavity, and the melt shrinks and wraps the mold core when cold, resulting in an increase in the demolding force.
As one of the most professional injection molding companies, we provide plastic switch mould, plastic moulding services, 2K molding and etc. For more information, please feel free to contact us!
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Plastic Household Mould
The smart switches and smart sockets of the smart home systems have the same specifications as normal power switches and sockets. Therefore, there is unnecessary to damage the wall, rewire, or buy new electrical equipment. It can replace the original wall switches and sockets directly. The system can be connected with the existing electrical equipment in the user's home, such as lamps, telephones, and home appliances.
PLASTIC HOUSEHOLD MOULD TYPES
Plastic Switch Mould
USM is an ISO9001:2015 certified mold and injection molding factory. It has its own unique solutions from smart home appliance product development for mold design, mold manufacturing, and injection molding production.
PLC Controller Shell Mold
More and more people will have a high standard for a better life, most of home appliance product surfaces were made by mirror polishing, it requires for high standard to mold steel and polishing way, good mold steel without a technical polishing engineer, the product can not reach the high standard, they always work together.
Touch Switch Sensor Mold
Convenience, comfort, artistry, and realize an environmentally friendly and energy-saving living environment.
Plastic Box Mould
The operation way of smart home appliances is very diversified, It can be operated with a smart touch screen, a scene remote control, a mobile phone, or a computer. There is no limitation for time and place which can be operated at any time and any place, any devices realize intelligent control.
Visual Doorbell Housing Mold
Lighting control can adjust the lighting of all rooms by pressing a few buttons, the scene function can realize various scene modes, and the full turn on and off function can realize the one-key to turn on and off functions of all lamps and lanterns.
Voice Operated Switch Mold
We know that the basic goal of smart home appliances is to provide people with a comfortable, safe, convenient and efficient living environment. Therefore, the most important thing for smart home appliance products is to take practicality as the core, remove those flashy functions, and use practicality, ease of use, and humanization.
Advantages of Smart Home Appliance Mold
Meet different demands
In order to meet the different types of demands, grades, and styles, the control host of the smart home system can also be upgraded online, and the control function can also be continuously improved. In addition to achieving smart lighting control, home appliance control, security alarm, door and window control, and remote monitoring. In addition, other functions can be expanded, such as feeding pets, caring for the elderly and children, and watering the garden.
Consistency of installation specifications
Assuming that a two-wire smart switch is used during the renovation of the new house completely, one more neutral wire needs to be routed to the switch. Another important feature of smart home appliance products is that a normal electrician worker can assemble a complete set of smart home systems by looking at simple instructions.
The system is stable and reliable
Since the intelligent system of the entire building of smart home appliance products must ensure 24-hour operation, the safety, stability, and reliability of the smart home system must be highly valued, and it must be ensured that even at certain Internet speeds, the speed is low or unstable Under the circumstance, it still does not affect the main functions of the smart home system. For each subsystem, take corresponding fault-tolerant measures in terms of power supply and system backup to ensure the normal and safe for the system use, good performance, and the ability to cope with various complex environmental changes.
As a professional injection molding supplier, we provide plastic switch mould, plastic moulding services Insert molding and etc. For more information, please feel free to contact us!
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Transparent PC Injection Mold
It is the most widely used thermocouple in the hot runner system, and it is characterized by low price and is suitable for vacuum oxidation in reduction or inert atmosphere, the temperature range is -200～800℃, but the commonly used temperature is only below 500℃ because the oxidation rate of the iron hot electrode will increase when over this temperature, the thick wire diameter wire can still be used in high temperature and has a long life, the thermocouple is resistant to hydrogen (H2) and carbon monoxide (CO) gas corrosion, but it can not be used in a high temperature (for example, 500°C) atmosphere containing sulfur (S).
Key Points of Transparent Injection Molding Design
1. In order to prevent the hot runner from being damaged during the assembly process, the hot runner with a manifold should be designed with a hot runner protection guidepost, and the protection guide post must be higher than the highest point of the hot runner nozzle by more than 10mm, the diameter of the hot runner protection guidepost can be same as the reset lever.
2. The front of the hot runner nozzle (normally the core side) must be made unilaterally larger by 2mm and 1.5mm deep to avoid the empty round table to reserve the thermal expansion space of the hot runner nozzle.
3. The runner at the front end of the hot runner nozzle is generally designed on the side of the movable mold to avoid processing the runner on the hot runner nozzle.
4. The hot runner nozzle needs to design a separate cooling gate to cool the nozzle to prevent problems such as gate drooling and string, gate vestige too high, the part surface at gate area too hot and deformation, cycle time too long.
5. Drain and venting slot should be designed on the ground side of the hot runner plate.
6. The outlet must be chamfered to prevent the temperature sensing wire or heating wire from being scratched.
7. The water and oil gates of the hot runner are generally designed in the direction of the non-operator side and the ground side.
8. For hot runner molds, a 5mm thick insulator plate should be added to the top plate, which is generally made of a bakelite board to prevent heat loss.As a professional plastic injection manufacturer, we provide transparent plastic molding,clear injection molded plastics, clear plastic molding, plastic moulding services, Water-assisted injection mold and etc. For more information, please feel free to contact us!
