How To Make A Drawing In Solidworks

How to Draw a Coke Bottle Mold in SolidWorks?

Today I'll show you how to create a mold for a coke bottle in SolidWorks. We'll use the Cravity feature in this tutorial. This tool can be very helpful to subtract a shape from another shape. In this case, we'll subtract the shape of a plastic bottle from a solid block (the mold). I will also show you how to Split a model into new parts. I hope you will learn something from my SolidWorks tutorials.

Click here to download the 3D bottle model and Unzip it into your working map.

Open the file Bottle.SLDPRT

Go to: File > New > Open > Bottle. SLDPRT

SolidWorks model of a Coke Bottle

Now it's time to draw the mold block

Open a new part with model units set to millimeters

Go to: File > New > Part

Create a 2D sketch

Select the Front Plane in the feature tree (menu at the left side) and create a sketch by clicking on the 2D Sketch icon

The display changes so the Front plane faces you.

Create a new sketch at the Front Plane

Draw a Center Rectangle

Go to Tools > Sketch Entities > Center Rectangle or click on the center rectangle icon

Create a sketch that starts at the Origin.

Change the dimensions of the rectangle to 100 and 250 mm by clicking on the dimension button

Draw a Center Rectangle

Create an Extruded Boss/Base

Go to: Insert > Boss/Base > Extrude or click on the Extrude icon

The Boss-Extrude menu appears

Direction 1 is set to Midplane

Change D1 into 100 mm

Click OK

Create a Midplane Extrude

Save the file with the following name: Mold_Block.SLDPRT

Create a new assembly

Go to File > New > Assembly or click on the Assembly icon

Select the three planes in the feature tree and make them visible by clicking on the glasses.

Insert the Mold_Block

Go to: Insert > Component > Existing Part/Assembly

Click on the button.

Select the Mold_Block.SLDPRT in your working map.

Click OK

The Mold_Block is fixed automatically in the assembly.

Insert the Mold Block in the Assembly

Insert the Coke bottle

Go to: Insert > Component > Existing Part/Assembly

Click on the button.

Select the Bottle.SLDPRT in your working map.

Place the model of the Bottle next to the Mold_Block as shown in the picture.

Insert a Coke Bottle

Unhide the Planes

Go to View > Planes or click on the Planes icon Show and Hide Planes in SolidWorks

If the planes keep invisible click at the Glasses in the Feature Tree to Unhide the planes as shown in the picture

Make the planes visible

Place the Bottle inside the Mold_Block

Create a coincident mate

Go to: Insert > Mate

Select the coincident option. SolidWorks Coincident feature

Select the Front Plane of the Mold Block and the Front Plane of the Bottle.

Click OK

Add a coincident mate

Create another coincident mate

Go to: Insert > Mate

Select the coincident option. SolidWorks Coincident feature

Select the Top Plane of the Mold Block and the MIDPLANE of the Bottle.

Click OK

Add a coincident relation

Create another coincident mate

Go to: Insert > Mate

Select the coincident option. SolidWorks Coincident feature

Select the Right Plane of the Mold Block and the Right Plane of the Bottle.

Click OK

Fix the Mold

The two models are now fully defined.

Use the Section View to check if the Bottle is inside the Mold Block.

Go to View > Display > Section View or click on the Section View button SolidWorks Section View Button

Enable the Section View to look inside the model

Now it's time to subtract the model of the bottle from the Mold Block.

Click at the Mold_Block and click at the Edit Part icon as shown in the picture SolidWorks Edit Part

You'll get the following warning: "The assembly must be saved to perform this command"

Click at Save and Continue to Save the assembly.

Save the assembly to continue

I will show you how the Cavity feature works.

Go to: Insert > Features > Cavity or click on the Cavity icon SolidWorks Cavity Feature

Select the Bottle in the Feature Tree as Design Components.

Subtract a model inside an assembly with the cavity feature

Click OK

Click at the Edit Part button in the upper right corner to close the Part mode. Edit Part in SolidWorks Assembly

Now I will show you how to split the Mold into two parts:

Draw a Split line

Select the Right Plane in the feature tree and create a sketch by clicking on the 2D Sketch icon

Draw a vertical line as shown in the picture

Click at the Sketch button in the upper right corner to close the 2D Sketch

Split a part into solidworks with a split line.

Go to Insert > Features > Split or click on the Split icon SolidWorks Split Feature

Select Sketch2 as Trim Tool and click on Cut Part

Select Part 1 and Part 2 in the Resulting Bodies tab and change the names of the parts

Click OK

Split the two parts

You're done! 🙂

Click here to download the 3D bottle model.

Did you like this tutorial and are you eager to learn more? Then you should really check my SolidWorks Boeing 747 course . In this video training course, I will show you how to model an incredible Boeing 747-8 in SolidWorks from scratch.