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Glows near the black pc gate

1. The surface of the mold is not matte treated, and the matte layer is broken. The mold surface is not treated with matte. The shine near the black pc gate is caused by the lack of matte treatment on the mold surfaceDoes pc injection molding black have a bright print?theDoes pc injection molding black have a bright print?, needs to be matte treatment. The matte layer is broken. A broken matte layer will also cause shining near the black pc gateDoes pc injection molding black have a bright print?, you need to find the shiny part of the gate, and you can use low-speed injection at that position.

2. Main reasonsDoes pc injection molding black have a bright print?: The gate size is too small: The gate serves as a channel for molten plastic to enter the mold, and its size directly affects the flow speed and shear force of the plastic. When the gate is too small, the plastic will be subjected to a large shear force during the injection process, resulting in a sharp increase in the material temperature. After plastics at high temperatures are cooled and solidified, they are prone to strong shrinkage marks, which in turn will form a shiny phenomenon at the gate position.

3. The gate is too small: The gate size is too small, causing the plastic melt to experience a large shear force when passing through the gate, causing the melt temperature to increase, resulting in coking and shining near the gate. Poor exhaust: During the injection molding process, if the gas in the mold cavity cannot be discharged smoothly, bubbles or high-pressure areas will be formed when the melt is filled. These areas may appear shiny or burnt marks after cooling.

ABS+30% PC material white after injection molding

Mold: You can have this, but it is generally difficult to handle or unwilling to adopt, so I will not mention it.

Materials: Switch to specifications with better fluidity and better compatibility

Process: Increasing the mold temperature is the best improvement, and increasing the material temperature will also have a certain improvement.

Problem description of silver wire problem: Silver wire, also known as silver lines, water spray, material flower, etc., is a silvery and whitish filamentary stripe phenomenon that appears on the surface of the product along the flow direction. There are three main components that generate gas: air: glue glue and air entrained in during the injection stage. Moisture: The moisture contained in the material itself. Pyrolysis gas: Gas produced by high-temperature hydrolysis/thermal decomposition. Solution: First check whether the material is sufficiently dry.

See the situation. Abnormal phenomenon caused by inappropriate materials or processes: When the injection molded parts appear obvious whitish lines under slight external force, this often suggests that there is stress concentration within the material. Common inducements include insufficient melting due to too low temperature of the barrel, or insufficient holding time, which leads to insufficient filling of the material, similar to the situation where insufficient heat during making rice cakes leads to raw flour inside.

Properly increase the mold temperature and material pipe temperature to improve the fluidity of the material and reduce the generation of vortex phenomena. Reduce the glue injection speed to reduce the generation of eddy currents. If the rubber inlet is thicker, it may make it more difficult for air to escape, so consider adding exhaust holes to help the escape of air.

First check whether the material is sufficiently dry. After confirming that the material is sufficiently dry, adjust the injection molding process to improve the silver wire defects. Pay attention to mold venting to ensure good mold venting. Flow mark problem description: Flow marks are caused during injection of materials due to poor flow of materials. They are different from silver lines. They are not caused by moisture or material decomposition, and their appearance is also different. Solution: Increase material temperature and improve fluidity.

PC products have a highlight effect, so why do ABS products have no option for highlight printing?

PC products have a highlight effect but ABS products have no corresponding options. The core reason is that there are essential differences in the material characteristics, application scenarios, and processing process adaptability of the two. The characteristics of the materials themselves are different. The molecular structure of the ABS material is dispersed in the styrene in a butadiene rubber phase. In the acrylonitrile matrix, it itself has a certain rubber phase toughening effect, and the surface is inherently matte texture.

First of all, the thickness of the materials in the design is uneven. For example, one side of a product is 2 mm thick and the other side is 0.5 mm thick. In this case, the bright print is caused by etching patterns, which cannot be improved by increasing the thickness of the patterns. It can only be adjusted by changing the structure. Secondly, if the brightness of the etching pattern is not uniformly adjusted or the ink pad is pressed during the etching process but is not sandblasted in time, this situation can be solved by re-sandblasting.

Molecules are highly oriented and stress is concentrated in large quantities. This change can be attributed to the common stress whitening and stress bright mark phenomena. 2. PC and ABS melt produce phase separation under high pressure and high shear force, causing color differences at the thin wall. The solution cannot be separated from three points: 1. Mold: This can be available, but it is generally not easy to handle or unwilling to adopt, so I will not mention it.

The designed wall thickness is uneven. The wall thickness of the injection molded pc two-color mask black sheet and white sheet highlight design is uneven, resulting in uneven cooling. The thin part has been cooled and solidified but the thick part has not cooled, resulting in collapse, and the injection molding speed is too fast and the pressure holding time is short; if the above situation is overcome, it can be avoided. White patterns mean that the air humidity during injection molding is high, and the material is not dried, resulting in water vapor in the material during injection molding. Attention should be paid to the following three items: process, reduce holding pressure, and increase cooling time.

The surface of the product looks shiny and is very suitable for surface treatment of plastic products such as pc plastic raw materials and abs plastic raw materials.

Injection molded pc two-color mask black sheet and white sheet highlight print

The designed wall thickness is uneven. The wall thickness of the injection molded pc two-color mask black sheet and white sheet highlight design is uneven, resulting in uneven cooling. The thin part has been cooled and solidified but the thick part has not cooled, resulting in collapse, and the injection molding speed is too fast and the pressure holding time is short; if the above situation is overcome, it can be avoided. White patterns mean that the air humidity during injection molding is high, and the material is not dried, resulting in water vapor in the material during injection molding. Attention should be paid to the following three items: process, reduce holding pressure, and increase cooling time. Increase the ejection system and increase the ejection area (pay attention to waterway interference).

Composite molding ability: Can be used for secondary injection molding, two-color injection molding, composite molding with a variety of plastics (such as PP, ABS, PC/ABS, etc.) or metal materials. Formulation and physical properties selection: For different hard rubber materials for secondary injection molding, TPR materials with different formulations and physical properties should be selected according to customer requirements.

Various molding methods: Various rubber and plastic products can be processed through injection molding, extrusion, blow molding, casting, coating and other molding methods. Drying and processing temperature: For some products that need to be dried, it is recommended to dry at 60~80℃ for 2 hours. Processing temperatures vary according to substrate and product requirements and need to be reasonably controlled.

TPR material, thermoplastic rubber material, refers to thermoplastic rubber material.

For injection molding materials, resins with a slightly lower relative average molecular mass should be selected, with an MFR of 5 - 7g/10min; for complex shaped or thin-walled products. The forming temperature should be higher, 285~305℃; while for thick-walled products, the forming temperature is slightly lower, 250~280℃. Different injection molding machines have different molding temperatures. The screw type is 260~285℃, and the plunger type is 270~310℃.

How to prevent bright prints from being printed on the mold?

1. To prevent the sun-printed mold from producing bright marks, you can treat it from the following aspects: The primary measure for mold surface treatment: Carry out professional matte treatment on the mold surface to ensure that the mold surface itself has matte characteristics, so as to avoid the process of forming. Bright marks are generated during the process. Adjust the molding conditions and increase the mold temperature and material temperature: Properly increase the mold temperature and material temperature to help the melt flow better and replicate the matte texture on the mold surface.

2. Secondly, if the brightness of the etching pattern is not uniformly adjusted or the ink pad is pressed during the etching process but is not sandblasted in time, this situation can be solved by re-sandblasting. Third, the reason for the material itself, such as PC+ABS material itself is relatively bright, which is the characteristic of the material itself. If the injection molding process is not properly operated, the light needs to be readjusted. Finally, too long use time is also an important reason for highlighting.

3. What we can do is try to let the melted glue copy the mold surface and completely reflect the mold surface characteristics. According to the forming conditions, increase the mold temperature and the material temperature and increase the shooting speed to prevent cold material. For raw materials, fully dry them to prevent the influence of water vapor; do not use or use less secondary materials to prevent raw material pollution. For the raw material formulation, try to increase the fluidity of raw materials: select a resin matrix with high melting index, use lubricants, etc.

4. There are impurities in the injection molding materials: Some injection molding products may be mixed with some impurities that cannot withstand high temperatures. Because these impurities cannot withstand high temperatures, these low-molecule things will be burnt and will appear on the surface. The injection molding products will look shiny and have a bright print.

This is the end of the introduction about whether pc injection molded black has a shine mark and why pc injection molded black has a shine mark. slot machine ph casino,slot ph casino,slot ph,BAY888.com The world's leading slot game platform, providing exciting gaming experience and generating rewards. Join now and start your journey to victory!。