Chloe Zhang
There are several ways to connect plastic picture frames together. One common method is to use an adhesive such as glue. Water-based glues like PVA or EVA are easy to use but ineffective on plastics. Polyvinyl Acetate glue (PVA) is often used for joining picture frame corners. Other types of adhesives, such as fast-bonding super glues, are more suitable for plastic frames. Alternatively, you can use mechanical fasteners like V-nails, which are driven into the frame's corners using pneumatic pressure. Acrylic adhesive tapes are also an option, as they are less likely to discolour over time compared to household tapes.
| Characteristics | Values |
|---|---|
| Adhesives | Polyvinyl Acetate (PVA) glue, Plastibond glue, Polyurethane glue, Hot-melt glue, Acetone-solvented glue, Poly glue, Cyanoacrylates, Methyl Methacrylate, Super glue |
| Tapes | Acrylic adhesive tapes, Adhesive transfer gun (ATG) tape |
| Nails | V-nails, Framing pins |
| Tools | Guillotine, Adhesive transfer gun, Band clamp |
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What You'll Learn
Using glue
First, remove any protective plastic wrap from your new frames. Plan the arrangement of your frames before you start gluing. You can print pictures and see how many are portrait or landscape to help decide on a design. Once you have a design in mind, load the pictures into the frames so that all you need to do is connect them.
Next, you will need to choose the right type of glue. Polyvinyl Acetate glue (PVA) is a good option for joining picture frame corners. It is easy to use and can be found in most supermarkets or stationery stores. PVA glue dries overnight and is flexible, making it a durable option. However, it may not work well with all types of plastic, so be sure to test it on a small area first. If you need a stronger bond, you can use Plastibond glue, which is a fast-acting plastic glue similar to Super Glue. You can also use hot glue, which dries quickly and creates a strong bond.
When you are ready to start gluing, apply a thin layer of glue to one of the mitre faces. Be careful not to use too much glue, as a little goes a long way. Quickly press the two mitres together to form a corner, and use a band clamp to hold the corners tightly together while the glue dries. If you are using hot glue, hold the frames together for about 30 seconds until they are secure.
Finally, wipe away any excess glue with a wet cloth, followed by a dry cloth. Do not wait too long, as glue that dries on the surface of the frame can damage it. Leave the frame in the band clamp for a few minutes to ensure a strong bond.
By following these steps, you can securely connect plastic picture frames together using glue.
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Types of glue
When connecting plastic picture frames, it is important to select the right type of glue to avoid damaging the frame or its contents. The type of glue depends on the plastic composition of the frame, which can be identified by a recycling symbol or number. Here are some types of glue that can be used for plastic picture frames:
Polyvinyl Acetate (PVA) Glue
PVA glue is often recommended for joining picture frame corners. It can work for some plastics, depending on the surface. PVA glue is water-based and easy to use, but it may not be suitable for all plastics.
Plastibond Glue
Plastibond glue is a fast-acting plastic glue that creates a strong bond, similar to super glue. It is specifically mentioned as suitable for imitation wood frames.
Poly Cement
Poly cement is recommended for clear, brittle plastics, such as imitation glass or CD cases, which are typically made of polystyrene. Loctite Plastic Bonder is an example of a poly cement adhesive.
Cyanoacrylate Glue (Super Glue)
Cyanoacrylate glue, also known as super glue, is a strong adhesive that can be used for plastic bonding. It sets quickly, allowing you to hold the corner closed until it bites. However, it requires careful application as it is runny and only works as a one-shot chance.
Epoxy-Based Adhesives
Two-part epoxy adhesives are versatile and can be used for various plastics, including ABS and polyethylene. They create a strong, permanent bond but require preparation and mixing according to the product instructions.
In addition to these glue types, hot-melt glue can be used for immediate adhesion, and polyurethane glue provides a sturdy hold but may leave a mess due to unpredictable foaming. It is important to avoid household tapes and low-grade adhesives, as they can deteriorate or contain harmful acids that may damage the frame over time.
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Using nails
Joining picture frames using nails is a traditional method that has been used for decades. While there are now various other methods available, such as using glue or an underpinner, nails can still be an effective way to connect plastic picture frames. Here is a step-by-step guide on how to do it:
Step 1: Prepare the Frames
Before joining the frames, ensure that the edges of the plastic frames are cut precisely at 45-degree angles to form mitred edges. Smooth edges are essential for a seamless join.
Step 2: Choose the Right Nails
Select the appropriate type and size of nails for your project. V-nails, also known as "picture framing pins," are commonly used for joining picture frames. They have one sharp and one blunt 'V'-shaped end, designed to be pushed into the 45-degree corners. Choose a V-nail size that is appropriate for the thickness of your plastic frames—aim for a depth of 2/3 to 3/4 of the depth of the frame material.
Step 3: Prepare the Nails
If you are hand-driving nails into plastic, you may need to pre-drill holes to guide the nails. You can use one of the nails as a makeshift drill bit by grinding or filing off the head. This method may be slower, but it is functional and reduces the risk of breaking a drill bit.
Step 4: Nail the Frames Together
Join the mitred edges of the plastic frames by driving the nails into the corners. Use a hammer for manual nailing, or consider using a power nail gun for faster and more efficient nailing. Ensure the nails are driven in straight and securely.
Step 5: Fill in Gaps (Optional)
If there are any gaps or misalignments in the joints, you can fill them with coloured waxes or specialised pastes like CC or CJ Paste. This step is optional but can improve the overall appearance of your joined frames.
Remember that nailing plastic frames together requires precision and accuracy. The act of nailing can cause gaps if not performed correctly, so take your time and ensure the frames are securely held in place during the process.
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Precision cutting
Precision is key when cutting plastic picture frames, as a mistake could ruin the entire frame. There are a few methods that can be used to cut plastic with precision.
Precision Die Cutting
Precision die cutting is a process of cutting plastic into various shapes and sizes using a machine. This method is highly effective for repeated, high-volume production. However, it is not as economical for small runs and does not offer much flexibility. For instance, changing the thickness of the plastic may involve creating a new setup.
Dieless Knife Cutting (Flash Cutting)
Dieless knife cutting uses a combination of machinery and computers to cut plastic into various shapes and sizes, without the need for hard tooling. This method is more attractive for rapid prototyping, short productions, and reducing material waste. It is also easier to update the shapes and sizes being cut.
Rotary Tools
Rotary tools, such as the Dremel Multi-Tool, can also be used to cut plastic. When used with the correct cutting disc and speed setting, the plastic will not melt and will result in a neat, smooth cut. Thinner cutting discs are typically used for thin plastics, while thicker, reinforced cutting discs are used for thicker or solid plastics. It is important to cut at a low speed to avoid excessive heat generation, which can cause the plastic to melt.
Wondercutter
The Wondercutter is a specialty cutting tool that uses a vibrating blade to cut through hard plastic with ease. It is powered by an onboard battery, which can last up to 2.5 hours for thinner plastics, and 1.5 hours for thicker plastics. The blade vibrates at a rate of 40,000 vibrations per second, allowing it to cut through plastic with minimal effort. This tool provides maximum control over the positioning of the blade, making it ideal for delicate and precise cuts.
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Gluing techniques
Gluing plastic picture frames together requires careful consideration of the type of glue used, as well as the application process. Here are some detailed gluing techniques to ensure a strong and secure bond:
Select the Right Adhesive:
The choice of adhesive is critical when gluing plastic picture frames. Water-based glues like PVA (Polyvinyl Acetate) are user-friendly but ineffective on plastics. For a strong bond, fast-acting plastic glues like Plastibond, Super Glue, or cyanoacrylate adhesives are recommended. These glues are related to super glues and provide a sturdy hold. If you are looking for an option available at hardware stores, consider PVC glue or Gorilla Glue, which has proven effective on plastic surfaces.
Prepare the Frames:
Before gluing, ensure the plastic frames are clean and free of any protective wrap. Play around with the frame arrangement to determine the desired configuration. Load the pictures into the frames so you can focus solely on connecting them.
Apply the Glue:
When applying the glue, less is more. Start by adding a thin strip of glue along the side of the frame where the adjacent frame will meet. Work quickly, as some glues, like Plastibond, dry rapidly. Press the frames together and hold them securely for about 30 seconds. Ensure the frames are on a flat surface to avoid uneven angles.
Reinforce the Joints:
Once the frames are connected, reinforce the seams that may easily come apart. Flip the frames over and use hot glue to securely brace the frames together. Be cautious to avoid getting glue on the cardboard picture backing, as it may cause issues when replacing the picture.
Clean Excess Glue:
After gluing, carefully remove any visible glue "strings" or "webs" that may be present. Use a wet cloth followed by a dry cloth to wipe away any excess glue that may have squeezed out at the seams. Do this promptly, as glue that dries on the frame's surface can cause damage.
Secure with Clamps:
To ensure a tight bond, consider using a band clamp. Lay the clamp slack around the frame before pressing the corners together. After joining the corners, tighten the band clamp to close the joints firmly. This will help create an even stronger bond.
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Frequently asked questions
Polyvinyl Acetate glue (PVA) is often used for joining picture frame corners. However, PVA may not work well with plastic frames as it is designed for wood frames. Instead, you can use Plastibond glue, a fast-acting plastic glue, or a solvented glue for a stronger bond.
Adhesive tapes, such as acid-free ATG tape, can be used to connect picture frames. However, it is important to avoid household tapes such as office tape or masking tape as they can deteriorate over time and damage the frame.
You can use a guillotine to achieve 45-degree mitred edges, which are then joined together to form the frame. A v-nailer or an adhesive transfer gun (ATG) can also be used to ensure the corners are held tightly together.
V-nails are commonly used to join picture frame corners. They come in various heights to accommodate different moulding thicknesses, such as 7 mm, 10 mm, 12 mm, and 15 mm. For hardwoods, use v-nails made of hardened steel, while for softwoods, use softer steel v-nails.
Apply the glue to one of the miter faces and press the two miters together to form a corner. Work quickly as some glues dry fast. Use a band clamp to tighten the joints and wipe away any excess glue with a wet and dry cloth.
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