Central armrest box storage box injection mold
The car armrest box is a kind of car accessory installed between two seats, which belongs to the car interior system. The original intention of its humanized design is to enable the car driver to place his arm during long-term driving, so that the arm can be effectively rested without numbness and stiffness. With the continuous development of manufacturing technology and the continuous improvement of production technology, the armrest box has more storage functions, such as storing small objects such as beverages and water cups, so that the driver can easily get these small objects when necessary. The product picture of the central armrest box storage box is shown in Figure 1. The maximum size of the plastic part is 338.84.67mmX147.67mmX199.39mm, the average wall thickness is 2.32mm, and the quality of the plastic part is 292 grams. The material is FPP TSOP-AT5HF. The shrinkage rate is 0.0095, and the plastic part itself must not have weld marks, bubbles, burrs and other injection defects.
The plastic part of the central armrest box storage box is an automobile part of Canada GTS company. This article mainly introduces the GTS automobile mold design standard and related design essentials based on the plastic part.
The structure of the plastic part is complex, the shape is irregular, and the parting surface has large fluctuations. There are multiple buckles on the edge of the plastic part, and it is necessary to design the slider and the inclined top to solve the demolding problem. There is a closed box sinking position in the middle of the plastic part, the front mold has a large protrusion height, and the material removal is large during mold processing. It is necessary to select a tool with a larger diameter for rough processing. The choice of tool path during finishing is also critical. It is directly related to the accuracy and processing efficiency of the parting surface.
The size of the plastic part is larger and the depth is deeper. The mold design cavity rank is 1 out 1. The mold base is an inch size mold base, and its maximum external size is 23"x 27"; the horizontal ranking of the front and back molds in the mold design In the figure, the dimensions of the four green columns of the injection molding machine are drawn, and the dimensions of the injection molding machine are listed on the green columns of the reference angle. The specifications of the injection molding machine include: tonnage: 250 tons; Green column spacing: 27.5"; mold fixing plate size; 27"x 27"; maximum mold thickness 26", minimum mold thickness 10.65", maximum opening distance of injection molding machine 42"; maximum The ejection stroke is 6". The front and rear mold plans need to be marked with the operating side, the non-operating side, the sky side and the ground side.
Due to the complex structure of the mold, the side view of the mold requires multiple cross-sectional views to completely and clearly express the complete mold structure. For example, sections B, D, F, H, J, K, M, L, G, E, A, C, etc., are used to express the overall structure of the mold completely and accurately. These structures include sliders, gates, different inclined roofs, ejection systems and guide systems. The projection direction Y and Z of the projection view are at the base angle, and the views are VIEW "Y" and VIEW "Z" respectively. See mold design drawing 2.
The size of the plastic part is larger in the height direction, and the movable and fixed molds are all left on the mold base. In order to improve the positioning accuracy, 10mm precision positioning is designed in the four guide posts and guide sleeves.
The gating system of the mold adopts hot runner forming. The system includes a splitter plate and two hot nozzles to feed glue at both ends of the plastic part. After the molten plastic flows out of the hot nozzle, it enters the inner part of the plastic part through the horn gate. After the mold is opened, the gate can be automatically cut without affecting the appearance of the plastic part. In order to ensure the rigidity of the front mold, four positioning pins with a diameter of 1" are designed between the three templates of the front mold.
The slide core pulling system of the mold is driven by an oblique guide post. The inclined surface and bottom of the slider are all designed with wear-resistant plates. The positioning of the slider adopts the DME standard tiger buckle positioning. Considering the thickness of the A plate, the installation method of the inclined guide post is the pressing plate pressing method, and the corresponding position of each template Drill holes for use when removing the inclined guide post. The fixing method of the oblique guide post of the large mold is shown in Figure 5.
Considering the large size of the inclined roof, a round guide column is used as the inclined roof rod to guide the inclined roof ejection. Note that the guiding angle is different from the angle between the inclined top and the mold core. In order to facilitate the inclined top ejection. The fixing screws of the inclined ejector rod also drill holes in the thimble plate and the bottom plate to avoid the gaps to facilitate mold maintenance.
ABIS MOLD TECHNOLOGY CO.,LTD
Daisy Wang (Sales Engineering)
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E: daisy@abismold.com
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