Mouse shell shape and mold design

This is an article that combines the introduction of mouse products with Pro/ENGINEER software to complete product modeling and mold design.

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First, Pro/ENGINEER product and mold design process

Pro/ENGINEER mainly includes CAID (industrial design), CAD (mechanical design), CAE (functional simulation), CAM (manufacturing), PDM (data management) and Ge-ometry Translator (data exchange) modules. In the product and mold design, generally follow the following process.

1. Three-dimensional modeling

The 3D model of the part is drawn using the Part module based on the 2D sketch of the part.

2. Mold design

According to the provided three-dimensional model, the CM module is used to complete the mold design of the part.

3. Mouse 3D modeling

Use the Extrude, Pattern, Sweep, Hole, and Draft commands provided by the Pro/ENGINEER software Part module to create a mouse under the mouse as shown in Figure 1. Shell model.

  

figure 1

 

Second, the core and cavity design of the mouse lower shell mold

1. Structure of the workpiece

The outer surface structure of the workpiece is relatively simple, and there is a through hole and a blind hole. It is conceivable to create a small core at the through hole; the internal structure of the workpiece is complicated, except for one blind hole, a small core needs to be designed, and the rest are The support structure of the circuit board is not large in thickness and height direction, so the integral core can be considered and processed by means of electric spark.

2. Gating system

For mouse shell parts, the gate should not be opened on the outer surface to avoid affecting the appearance. Generally, it should be opened inside (latent gate) or edge of the part (side gate). Due to the complicated internal structure of the workpiece, the gate is opened at the edge of the workpiece, and a two-cavity or four-chamber arrangement is adopted to balance the flow path. as shown in picture 2.

  

figure 2


6. Split the mold volume

 

Firstly, the workpiece is divided by the slider type to obtain the sliders of each group; and the front and rear modes are obtained by dividing the workpiece volume block which is left after the segmentation of the slider by the main part type. Go to “Mold Volume” → “Split” → “TowVolume” → “Workpiece” → select the volume to be divided → “Pick” → select the parting surface → define each volume, use the reference part model and the mold volume for Boolean subtraction The operation acquires the cavity. Enter “Mold Comp” → “Ex-tract” to complete the mold volume extraction, as shown in Figure 9.

  

Figure 9 Figure 10

 

7. Create a model

Go to “Molding” → “Create” and simulate the casting.

8. Generate mold assembly drawing

Adding the mold base, creating the water line, modifying the ejector rod, modifying the fixing plate and the spacer block, eliminating the masking of each part, the assembly drawing of the designed mold can be seen, and the design of the entire mold is completed. The result is shown in Figure 10.

Technical features

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2.

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Technical Parameters
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Usage

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