automotive loudspeaker housing injection mold

automotive loudspeaker housing injection mold

automotive loudspeaker housing injection mold for automotive interior media player system or automotive audio system door panel, It is a project from our France Customer. UV resistance and fire resistance, Good toughness for the outside housing surface finishing. Complex click design of all around for lifters ,Short lead time comparing with our competitor, Run CPK to 1.88.

Product Details

       

Automotive loudspeaker housing injection mold for automotive interior media player system or automotive audio system door panel, It is a project from our France Customer. UV resistance and fire resistance, Good toughness for the outside housing surface finishing.Complex click design of all around for lifters ,Short lead time comparing with our competitor, Run CPK to 1.88. 


Mold details:  

Type:

Automotive Plastic Injection mold

Core surface finish:

Polish

Production Material:

ABS/PC

Cavity surface finish:

Texture

No of Cavities:

1x1

Injection System

Hot Runner

Core Material:

8407 with heat treated

Type of gating:

 Direct gate

Cavity Material:

8407 with heat treated

Ejection system:

Ejection pin

Slider material:

SKD61

Lead time for T1

45 days

Mold base steel:

1050

Shot life:

1 000 000

Place of Origin

China

Packaging:

Plywood Box


Product Characters

1. UV resistance, Good toughness for the plastic housing outside surface finish

2. Complex click design of all around for lifters

3. Short lead time comparing with our competitor

4. Run CPK for critical dimensions and full dimension inspection

5. High requirement for appearance features

6. Hard shape deformation controlling


Please note that this information is just for reference and don’t copy or use to others purposely.



   Automotive  Plastic Injection Mould Making Process:

Asia Billion Industry Plastic Injection Mould Making Process


Asia Billion Industry Injection Tooling making engineering and project capacity


Tooling shop Overview:


Our Tooling shop Overview



Our Certifications and Quality Control:

Our Certifications and Quality Control


Tooling Packing and Logistics:

Packing and logistics


 

Five elements of injection molding process parameters!


Injection pressure


Injection pressure is provided by the hydraulic system of the injection molding system.


   The pressure of the hydraulic cylinder is transmitted to the plastic melt through the screw of the injection molding machine. Under the pressure, the plastic melt enters the vertical flow path of the mold through the nozzle of the injection molding machine (also the mainstream channel for some molds), the main flow channel, and the split flow. The process passes through the gate into the mold cavity. This process is the injection molding process, or the filling process.


  The pressure is present to overcome the resistance during the melt flow, or conversely, the resistance present during the flow process needs to be offset by the pressure of the injection molding machine to ensure a smooth filling process.


   During the injection molding process, the pressure at the nozzle of the injection molding machine is highest to overcome the flow resistance throughout the melt. Thereafter, the pressure gradually decreases toward the front end of the melt along the flow length. If the internal exhaust of the cavity is good, the final pressure at the front end of the melt is atmospheric pressure.


There are many factors that affect the melt filling pressure.


There are three categories in summary:

(1) Material factors such as the type and viscosity of the plastic;

(2) structural factors such as the type, number and location of the gating system, the shape of the cavity of the mold, and the thickness of the product;

(3) Process elements of molding.


Injection time


   The injection time mentioned here refers to the time required for the plastic melt to fill the cavity, and does not include the auxiliary time such as opening and closing of the mold.


  Although the injection time is short and the effect on the molding cycle is small, the adjustment of the injection time has a great effect on the pressure control of the gate, runner and cavity. Proper injection time contributes to the ideal filling of the melt and is of great importance for improving the surface quality of the product and reducing dimensional tolerances.


  The injection time is much lower than the cooling time, which is about 1/10 to 1/15 of the cooling time. This rule can be used as the basis for predicting the overall molding time of the plastic parts.


  In the case of the mold flow analysis, the injection time in the analysis result is equal to the injection time set in the process conditions only when the melt is completely driven by the screw rotation to fill the cavity. If the holding pressure of the screw occurs before the cavity is filled, the analysis result will be greater than the setting of the process conditions.


Injection temperature


  Injection temperature is an important factor affecting injection pressure. The injection molding machine barrel has 5 to 6 heating sections, each of which has its own suitable processing temperature (for detailed processing temperatures, please refer to the data provided by the material supplier).


  The injection temperature must be controlled within a certain range. The temperature is too low, the melt plasticization is poor, affecting the quality of the molded parts, increasing the difficulty of the process; the temperature is too high, and the raw materials are easily decomposed. In the actual injection molding process, the injection temperature is often higher than the barrel temperature, and the higher value is related to the injection rate and the performance of the material, up to 30 °C.


  This is caused by the high heat generated by the shearing of the melt as it passes through the injection port. In the mold flow analysis, the difference can be compensated in two ways, one is to try to measure the temperature of the melt-to-air injection molding, and the other is to include the nozzle in the modeling.


Holding pressure and time


   At the end of the injection molding process, the screw stops rotating and only advances, at which point the injection molding enters the pressure holding phase. During the pressure keeping process, the nozzle of the injection molding machine continuously feeds the cavity to fill the volume vacated due to the shrinkage of the workpiece. If the cavity is filled without holding pressure, the part will shrink by about 25%, especially if the tendon is too large to form a shrinkage mark. The holding pressure is generally about 85% of the maximum filling pressure, of course, it should be determined according to the actual situation.


Back pressure


   Back pressure refers to the pressure that the screw needs to overcome when reversing the backstock. The use of high back pressure facilitates the dispersion of the colorant and the melting of the plastic, but at the same time prolongs the screw retracting time, reduces the length of the plastic fiber, and increases the pressure of the injection molding machine, so the back pressure should be lower, generally not exceeding the injection molding. 20% of the pressure. When injection molding foam, the back pressure should be higher than the pressure formed by the gas, otherwise the screw will be pushed out of the barrel. Some injection molding machines can program the back pressure to compensate for the reduction in screw length during melting, which reduces the heat input and slows the temperature. However, as the result of this change is difficult to estimate, it is not easy to adjust the machine accordingly.


How to determine the parting line of the injection mold?


  When we are doing mold processing, we must have a parting line. Why is there a parting line? In fact, the parting line is also called a parting line, mainly considering the design requirements and appearance requirements of the product. Whether the processing is feasible and the position of the mold to follow the glue. Plastic products will have obvious parting line marks anyway, and the mold line will know the structure of the mold. The following injection mold manufacturers come to tell you how to determine the parting line:


How to determine the parting line:


  Before designing the parting surface, it is first necessary to determine the shape and position of the parting line on the plastic part. When the mold opening direction is determined, it is easier to determine the parting line. Because the projection of the parting line in the mold opening direction coincides with the outer contour of the projection of the plastic part in the direction, it is possible to move along the outer contour line projected by the object with a straight line parallel to the mold opening direction, and The intersection of the line at each location with the surface of the object.


(1) When a line intersects the surface of the object at a point, the point is the point on the parting line.


(2) The line intersects the object in a multi-point, multi-segment straight line, indicating that the intersection of the global approach cone and the mold opening direction is 0, so the design of the core is designed, and the parting line should be determined according to the shape and size of the core. .


(3) A straight line intersects the surface of the object in a straight line segment, and any point on the straight line segment can be used as a point on the parting line, specifically determining which point is used as a point on the parting line, generally with its adjacent The shortest connection is the principle. It can also be determined interactively.


  What we are introducing today is why there is a parting line and how to determine the parting line when the mold is injection molded. I hope everyone can have a new understanding of our parting line after reading this article.


  As a worthtrusted automotive loudspeaker housing injection mold manufacture for automotive audio system and other automotive interior plastic injection toolings. we believe that we can help you more than others. Contact us for freely if you have any project.



Mold details:  

Type:

Injection mold

Core surface finish:

Polish

Production Material:

ABS/PC

Cavity surface finish:

Texture

No of Cavities:

1x1

Injection System

Hot Runner

Core Material:

8407 with heat treated

Type of gating:

 Direct gate

Cavity Material:

8407 with heat treated

Ejection system:

Ejection pin

Slider material:

SKD61

Lead time for T1

45 days

Mold base steel:

1050

Shot life:

1 000 000

Place of Origin

China

Packaging:

Plywood Box


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