
Do-it Soft Plastic Molds are a great option for anglers who want to create their own customized soft plastics. These molds are made from bar stock aluminum and are designed to work with Do-it's range of soft plastics, plastic injectors, and accessories. With Do-it Soft Plastic Molds, anglers can produce their own lures with a personal touch, although some users have reported issues with the molds not lining up correctly or breaking. The cost of these molds varies, with aluminum molds priced at $40-80 each, while other options such as CNC molds or 3D printing may be more expensive.
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What You'll Learn

Soft plastic molds for fishing lures
Creating your own soft plastic molds for fishing lures can be a fun and rewarding experience, and it's certainly possible to do it yourself. There are a few different methods and materials you can use, each with its own advantages and disadvantages.
One popular method is to use silicone molds. Silicone is easy to work with and fairly inexpensive, making it a good option for those just starting out. You can create a master shape out of wood and then use that to create your silicone mold. The downside of silicone is that it may not last as long as other materials, and it can be tricky to get a perfect pour every time due to its flexibility.
Another option is to use aluminum molds. Aluminum is more durable and will last longer than silicone, but it is also more expensive. If you're planning on making a large number of lures or selling them, aluminum may be a better investment. CNC aluminum molds can produce high-quality lures, but they come at a higher cost.
There are also companies that specialize in providing soft plastic lure molds, such as BUGMOLDS and Do-It Molds. These companies offer a range of mold designs specifically for lure-making, which can save you time and effort in creating your own molds from scratch.
Additionally, you can find cheaper molds on websites like Amazon and eBay, although the quality may not be as high as those from specialized companies. Ultimately, the method you choose will depend on your budget, the number of lures you plan to make, and your personal preferences for durability and quality.
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Using aluminium molds
If you're looking to make your own soft plastic lures, aluminium moulds are a great option. They offer a number of benefits, including durability, high-quality results, and customisability. Here's a guide to help you get started with using aluminium moulds for your DIY soft plastic lures:
Choosing the Right Aluminium Mould
When selecting an aluminium mould for your soft plastics, it's important to choose a reputable supplier that offers high-quality products. Look for companies that specialise in creating aluminium moulds for soft plastic lures, such as WU Moulds or Ultra Moulds LLC. These companies often have professional fishing lure designers on staff, ensuring that their moulds produce visually appealing and effective lures. You can also find companies that offer custom mould design services, allowing you to create unique lures that meet your specific needs and brand requirements.
Preparing Your Aluminium Mould
Before using your aluminium mould, it's important to clean it thoroughly. This will help ensure that your soft plastics turn out smooth and free of imperfections. Use a clean cloth or brush to remove any dust or debris from the mould. You can also use rubbing alcohol to clean the mould and ensure that it is free of any residue. Additionally, consider spraying the mould with a high-temperature motor gloss paint, as this can help make your soft plastics turn out cleaner and more detailed.
Working with Soft Plastics
When working with soft plastics, temperature control is crucial. You'll want to get your plastic up to around 350 degrees Fahrenheit and stir it well. It's also a good idea to warm up your mould and injector before use. This can be done with a warming pad, electric skillet, or even a heat gun in a pinch. Once your plastic is at the right temperature, use a hand injector to fill your mould, applying steady pressure to ensure a consistent flow.
Removing the Finished Product
After injecting the soft plastic into the mould, you'll need to allow it to cool and harden before removing it. Be sure to follow the specific instructions provided by your soft plastic manufacturer for the best results. Once the plastic has cooled, carefully remove it from the mould. If you're having trouble releasing the plastic, you may need to apply a release agent to the mould before injecting the plastic. With the right techniques and a bit of practice, you'll be able to create detailed and effective soft plastic lures using your aluminium moulds.
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Using silicon molds
Using silicone moulds for soft plastics is a great way to get creative and make intricate, delicate, or unusual objects. The process is straightforward, but it requires precision and speed as silicone sets fast. Here is a step-by-step guide to help you get started:
Prepare Your Workspace and Materials:
Start by gathering all the necessary tools and materials, including casting silicone, a measuring jug, a plastic stirrer, a take-away container, clay, a knife, and the object you wish to cast. Ensure your workspace is clean and ready.
Clean and Prepare Your Object:
Before you begin, clean your object of any dirt or dust. Use clay to create a small strip at the back of your object, ensuring it sits flat when placed down. This strip will serve as the entry point for the plastic once the mould is created.
Seal the Mould Box with Clay:
Roll the clay into thin noodles and press them along the edges of your mould box, both inside and out. This step ensures that silicone doesn't escape when pouring it later.
Prepare and Mix the Silicone:
Follow the manufacturer's instructions for the correct mix ratio of the silicone base and catalyst. Use a plastic container four to five times larger than the material volume to allow for expansion during vacuum degassing/de-airing. This process eliminates air bubbles that can interfere with exact surface reproduction.
Pour the Silicone:
Concentrate on the highest point and the centre of the object. Pour the silicone directly onto the most detailed section first, then move around the object, ensuring even coverage. Work quickly, as silicone sets fast.
Release the Mould:
After about 30 minutes, or when the silicone stops being sticky, release your mould. Remove the clay from the edges of the container and silicone mould. Stretch the sides of the mould gently to remove the object. Keep the clay and container for future use.
Finishing Touches:
Once the object is removed, you can use the mould. This mould works best when plastic is hand-pressed into it. Remember to wear heat and chemical-resistant gloves when handling the plastic. You may need to sand or cut off any messy edges to achieve the desired finish.
Creating silicone moulds for soft plastics is a fun and experimental process. You can cast simple or complex objects, limited only by your imagination. Enjoy exploring the possibilities!
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CNC molds
Do-it Soft Plastic Precision Series CNC Molds are designed to work with Do-it's Plastisol and Accessories. They are offered in a wide selection of proven fish-catching shapes. CNC molds produce better-quality baits than non-CNC molds.
Do-it's CNC molds are molded from bar stock aluminum and have been rigorously researched and developed. They are designed to work with Do-it's premium lineup of soft plastic, plastic injectors, and accessories.
To get the best results when using soft plastic molds, it is important to control the temperature of the plastic. It is recommended to heat the plastic to 350 degrees Fahrenheit and stir it well. It is also a good idea to get the molds and injector warm before use. A warming pad, electric skillet, or heat gun can be used for this purpose.
In addition to temperature control, using a good set of clamps can help to maintain steady pressure on the injector while shooting. The type of mold used can also make a difference in the ease of use. For example, the Crappie Fluke mold is generally considered easier to use than the Ripper mold.
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Cleaning and painting molds
When it comes to cleaning and painting your DIY soft plastic molds, there are a few important steps to follow to ensure the best results. Here is a detailed guide to help you through the process:
Cleaning Soft Plastic Molds:
Start by cleaning your soft plastic molds with a mild, alcohol-based solution. Rubbing alcohol is a great option for this purpose. Use a clean cloth or cotton pad dipped in the alcohol solution to wipe down the entire surface of the mold. This will help remove any dirt, dust, or residue that may have built up during use. Ensure the mold is thoroughly dried before proceeding to the next step.
Painting Soft Plastic Molds:
Once your mold is clean and dry, it's time to apply paint. Choose a high-temperature paint designed for use on soft plastics, such as a high-temp motor gloss spray paint. This type of paint can withstand higher temperatures, which is essential when working with soft plastics that require heat to mold.
Before painting, ensure the work area is well-ventilated. Shake the paint can according to the manufacturer's instructions, and then apply light, even coats to the mold. It is generally best to apply multiple thin coats rather than one heavy coat to avoid drips and ensure a smooth finish.
Allow the paint to dry completely between coats. Depending on the paint you choose, you may need to bake the mold in an oven to cure the paint fully. Always follow the paint manufacturer's instructions for proper application and curing techniques.
Additional Tips:
- Keep your molds warm before injecting soft plastic. This can be achieved with a warming pad or electric skillet, or in a pinch, a heat gun can be used.
- Practice good temperature control. Getting the plastic to the right temperature (around 350 degrees Fahrenheit) and stirring it well before injecting is essential for achieving the best results.
- Consider investing in a good set of clamps to maintain steady pressure on the injector while shooting.
By following these steps and tips, you can effectively clean and paint your DIY soft plastic molds, ensuring they are not only functional but also have a clean, professional appearance.
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Frequently asked questions
Aluminum molds are a good option as they are durable and low cost, at $40-80 each.
The ideal temperature for the plastic is 350 degrees Fahrenheit. It is also important to get the molds and injector warm before shooting.
It is important to keep steady pressure on the injector while shooting. A good set of clamps can also be useful.
Do-it Soft Plastic Molds are molded from bar stock aluminum and are designed to work with the company's premium lineup of soft plastic, plastic injectors, and accessories.











































