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How to Fix the Broken Out Screw Holes in the Laptops - Internal Hardware

This video is of India's Lappy brand. The American brand is QBond. This seems a little bit better than Epoxy Putty because the dust easily fills in the crevices, and it's easier to work with compared to the Epoxy Putty. The Epoxy Putty is sticky work. It's not nearly as easy to work with, but it can be done. It is more wasteful though because the powder and glue trick can be more accurately measured out. With the putty way requires extra to be mixed, so that the job is not half done without enough of it mixed. It's a race before it dries. In the end some is always thrown away because it's better to have more than enough than not enough. This problem does not exist for the powder and glue technique because the material is always in the bottle/s. In this video she uses Plast-Aid powder and a syringe full of superglue. I like the syringe. You can also use Baking Soda or Baby Powder with superglue. Plastic Welding: How To Instructional Video by Techspan And then there's welding plastic. Hehe This guy uses the "washer" method. Cut out plastic such as credit card plastic, and then cover the hole from in the laptop case. It's to remake the hole for the screw, so that it does not pull through the laptop case. I prefer to use either viscous liquid epoxy with a gel viscosity or epoxy putty instead of the plastic washer trick. Just tape the hole on the outside, pile up the epoxy on the inside, and drill through it. That remakes the screw hole. Some liquid epoxies dry with a gloss and transparency. That will blend with the case's color. The epoxy putty will stand out after it is dry, and so will some of the liquid epoxies.

How to Fix the Broken Out Screw Holes in the Laptops - Internal Hardware 1

1. How Gate Design Affects Your Plastic Parts

The runner and gate system used in plastic injection molding is responsible for directing molten plastic from the nozzle of the molding machine into the cavity of the tool. The gate architecture and its location affects cycle times, tooling costs, lead times, the location of witness marks and many other potential defects that are commonplace for injection molded parts. Here's what every product developer should know about the basics of injection mold gate design. Having this information will help you to make informed decisions when you are consulting with your supplier to make injection mold tools. The location of an injection mold gate directly affects the quality of the finished part so consider these general rules: The gate should be placed away from pins, cores and other internal obstructions. Otherwise this may cause weld marks as molten plastic flows around them and reforms on the other side Gates should be placed closest to thick walled areas to ensure complete Improper gate location can cause part if the build volume of the entire part is filled unevenly Gates are areas of high stress. Try to locate gates away from locations on the finished part that will be affected by or the potential degrading of plastic that happens in these areas Gates need to be located in areas that will be easy to degate, either manually or automatically. Note that some plastics are susceptible to high sheer forces and therefore can only be degated manually Thin walled parts might need flow channels or additional gates to provide a sufficient volume of plastic in a minimum All gates force molten plastic under pressure into the cavity which accelerates and heats the plastic as it does so. This creates a variety of effects which may need a change to gate design strategy. The most common defects include: If the gate is too small the resulting pressure drop through the gate will cause jetting, that is, spraying into the cavity rather than flowing smoothly. Jetting causes wavy distortions called "worming". This may require a decrease in pressure, an enlargement of the gate or both. High injection speed through the gate creates heat through friction. Too much heat at this point may cause the resin to decay by destroying molecular bonds. However, slowing down the injection speed to avoid degradation may cause other defects such as poor mechanical strength at weak weld lines. And slower cycle times means fewer parts per hour, increasing processing costs. It's possible therefore to divide a given volume of resin over a number of separate gate openings. This helps to dissipate pressure and avoid overheating, but it also creates multiple flow fronts which may cause weld lines and gas traps where these fronts meet inside the cavity. 3. The Difference Between Hot and Cold Runner Systems A hot gate/runner system uses an electrically heated cylinder to deliver pre-heated plastic into the mold cavity. The runner is built into the mold in the form of a manifold plate and a number of hot runner drops. Cold runner systems are less expensive, but the length of the runner represents plastic that will be wasted at each cycle, which in turn increases costs. Moving a witness mark to a more advantageous location should be balanced against the increased consumption of material due to longer runners. 4. The Pros and Cons of the Most Common Gate Types There are different sizes and gate designs to consider, and each type has their advantages and disadvantages. Here are the most common ones: Edge gates are used most often. They are machined into the mold at the parting line and fill the cavity from the side of the part. Easy to enlarge if necessary without removing the mold from the machine Location of the witness mark may not be ideal Plastic flowing from a single gate will create noticeable weld lines as it flows around obstructions in the mold High injection pressures and velocity at the small gate opening can cause the plastic to degrade A gate built into the sprue directly where it enters the fixed or A-side of the tool. Able to inject large volumes of plastic quickly Ideal for round or cylindrical parts where concentricity is important Leaves behind a large witness mark with the potential for a sink mark on the opposite side For a submarine gate design, the runner directs plastic to the edge of the cavity at the parting line, but then the gate drops below the parting line and tunnels upward to fill the part from below. This design is only possible on two-plate mold construction. Moves the witness mark to a more desirable location Excess gasses can be pushed up and out of the mold from below More complex, expensive and time-consuming to manufacture An alternative type of edge gate, the fan maintains a consistent thickness but spreads out to increase the volume over a larger area. Recommended for polycarbonate plastics. Good for increasing the flow volume for thin-edged parts May leave a large, tab-like witness mark that must be post-processed Are You Ready To Start Your Next Project? The above is just a summary of a few considerations for designing gates for plastic injection molding. If you are ready to start your next tool making project, upload your 3D CAD design for a free quote and our team of engineers and technicians can provide you with a design for manufacturing review before we start making your mold tool.

2. plastic or wire hangers?

Wire, they do not snap as easily

How to Fix the Broken Out Screw Holes in the Laptops - Internal Hardware 2

3. Does anyone have stories about disgusting things they have found in their food?

Once I found a large piece of plastic (looked like it was the cut off top of a bag of guacamole) in my taco salad. Last month I was eating fish and chips and a huge clump of hair stuck in the batter of the fish and *vomit* in mine and my toddlers mouths. It was horrible, I had to take my kids dinner away from him and go fish hairs from his mouth while trying not to vomit. he was so sad :(

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