Die Casting for Metal Package Components

A device and method for producing reliable can lids with improved joint strength and reduced defects. The device has two pressing tools that apply force to join the metal lid element and polymer components. During pressing, an alternating electromagnetic field is applied using an inductor in the press area. This stabilizes the temperature and prevents warping or deformation of the materials during pressing. One tool can have a channel for a temperature maintenance fluid to further stabilize its temperature. This prevents defects like misalignment, gaps, or incomplete seals that can occur during fast pressing.

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Sheet metal packaging with a removable foil lid that provides a simple, leak-proof, and easy-to-use package for filled containers. The packaging has a seamless deep drawn frame with a sealing flange at one end and a removable foil cover that seals over the flange. The other end of the frame is flanged to a separate sheet metal cover that forms the bottom. This eliminates the need for separate covers and allows filling through the open frame end. The packaging is made by deep drawing frames from sheet metal and punching foil covers. The frames and foil covers are pre-manufactured in kits, then filled and sealed.

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Method for forming a curled portion on the opening of a metal bottle-shaped can to maintain rigidity and sealing performance when the can thickness is reduced or the opening diameter is minimized. The method involves reducing the diameter of the upper threaded portion, forming a tapered wall, expanding and bending it outward, then rolling the front end back to contact the tapered wall. This forms a curled portion on the upper side of the tapered wall. Pressing the tapered wall inward as the front end rolls back prevents deformation during vertical loads.

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A single-piece aluminum wine bottle for sparkling wines like prosecco and champagne that eliminates the need for additional parts to hold the cork and cage. The bottle has a seamless mouth that forms a seat for the cork and allows the cage to securely lock around it. The seamless design avoids the need for separate sleeve pieces to hold the cage like conventional aluminum bottles. The single-piece mouth provides a continuous shape for the bottle and prevents leaks by ensuring proper corking and uncorking.

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Method for forming metal containers like beverage cans with improved formability and reduced defects. The key step is preheating the aluminum alloy sheet before rolling it into the container shape. The preheating temperature and time are chosen to reduce the dispersed phase size in the alloy below a certain value. This improves formability during subsequent forming steps like necking, expanding, and threading without defects like ripples, fractures, wrinkles, or puckers.

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Metal packaging with a sealed peelable membrane on the body of the can. The packaging has a shorter height compared to conventional metal cans with a separate sealing ring. The peelable membrane is directly sealed onto the can body using a specialized tool and roll configuration. This eliminates the need for a separate sealing ring and allows for taller, more compact metal packaging.

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A method for forming a curled opening on a metal can with a cap that prevents deformation and improves rigidity compared to conventional curled can mouths. The method involves curling the can mouth with an inclined wall section at an angle of 20-30 degrees. The tip edge of the curled portion abuts against the inclined wall. The curling radius decreases toward the tip. This prevents deformation when vertical loads are applied. The curling radius is 40-60% of the curl width. The tip edge abutting angle is near vertical. The curled portion apex is outside the center. This reduces tension during curling and prevents cracks.

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An all-metal cosmetic tube core that enables recyclability and reusability of metal packaging tubes. The core components like prong, bead, and spiral are made entirely of metal, eliminating the need for plastic injection molding. The metal core allows easier recycling compared to mixed plastic and metal tubes. The metal core components can also be easily separated for reuse compared to bonded plastic components. The metal core design involves features like protruding blocks, threaded sections, and reduced diameter regions to enable assembly and slide movement.

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Method, mold, and equipment for cutting packaging films like aluminum blister foil used in sealing containers. The method involves continuously feeding strip film, pushing it into a mold with an upper die, lower die, and pressing plate. The lower die cuts out the packaging film while the upper die and pressing plate hold the strip. The mold ejects the film while the feeder pushes more strip. A separate waste clamp extracts leftover strip. The mold design allows precise positioning and cutting of the film while reducing waste compared to conventional methods.

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A two-piece aluminum bottle with a simplified manufacturing process that reduces necking stages compared to traditional methods. The bottle is made by impact extruding an aluminum slug to form the main body, then drawing a cup from a separate piece for the bottom. The cup is sealed to the body using double seaming instead of necking. This eliminates multiple necking stages during preform shaping. The impact extrusion reduces wall thickness and height of the body.

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A method for forming a threaded neck on metallic beverage bottles that allows them to be sealed with twist-off caps like glass bottles, but without the issues of damage or requiring a separate opener. The threaded neck is formed by roll forming or cut forming threads on the curled lip of the bottle after it's sealed. This allows a closure to be threaded on and off like a glass bottle. The threads are formed by spinning the bottle while inserting vertical and exterior rollers that rotate in opposite directions to roll or cut threads into the lip. This enables reusing the closure and provides a reliable, cost-effective threaded closure for metal beverage bottles.

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Packaging method for inertial sensors that allows direct metal bonding between the sensor die and cover without interposing insulating material. This eliminates the need for metal through-holes and electrical connections later. The method involves arranging dielectric around the metal bonding surfaces and destroying Si-O bonds to facilitate adsorption and pre-bonding before heat treatment. The metal parts have controlled width and shape, like rings, to minimize risk of overflow during heat treatment. This allows permanent metal bonding without insulator pressure.

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A metal can with a resealable lid that has a unique shape for the curled portion on the opening. The curled portion has an upper end rounded portion with a smaller radius than the lower end rounded portion. This prevents the lower rounded portion from spreading outward when force is applied, preserving the can's tamper-evident seal. The upper rounded portion has a shorter radial length than the lower rounded portion. The escape surface below the curled portion has a larger radius than the lower rounded corner. This prevents the lower rounded portion from contacting and deforming the escape surface. The shape prevents the curled portion from expanding outward when force is applied, maintaining the seal and tamper-evident properties.

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Lightweight metal bottles with neck finishes that allow sealing with crown closures without compromising design freedom. The neck finish has three distinct sections - a planar proximal section, a curved distal section, and an intermediate section connecting them. The planar section has a width of at least 0.5 mm between bends. This configuration provides a stronger neck that can withstand the forces of crimping a crown closure without needing thicker walls. The neck finish allows thinner lightweight bottles to be sealed with crown closures instead of the high loads required for glass bottles.

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Continuous, waste-reducing, and efficient cutting system for packaging films like aluminum blister foil. The system uses a specialized mold and equipment to continuously cut and separate packaging films from strip material without waste. The mold has a die that punches out the film shape from the strip. A pushing mechanism moves the strip into the mold, and a clamping plate holds the die. The die cuts the film as the strip enters, leaving waste behind. After film removal, a waste clamp extracts the remaining strip sections. This allows precise, continuous film cutting with reduced waste compared to digging holes in the strip.

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A manufacturing method for cans with larger volume and height without increasing plate thickness or mold costs. The method involves three-stage drawing and ironing with increasing squeeze ratios. The first stage has 25-30% squeeze, second stage 30-39%, and third stage 40-50%. This progressive thinning suppresses body breakage. The blank diameter is 150-180mm. By controlling squeezing and thickness, the intermediate body can be formed without needing new molds. The thin walls and flanges prevent rupture.

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Bottle-shaped metal can with improved sealing and opening performance, and a manufacturing device for it. The can has a unique flange shape on the neck that allows better sealing and easier opening compared to conventional cans. The flange has a top with a maximum outer diameter, then a smoothly connecting diameter-reducing section, and a curved outer wall portion. This prevents excessive sealing material bite-in while allowing expansion during opening with reduced torque. The manufacturing die pushes the flange shape onto the neck.

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A can packaging with a distinctive outer texture that allows easy filling and emptying while avoiding issues like residue buildup. The texture is created by projections on the die wall during reverse extrusion. The projections form depressions on the outer wall of the can blank. The height of the projections is limited to 95% of the die wall height. This prevents depressions on the shoulder and rolled edge areas that could interfere with sealing. The texture on the rest of the can provides a haptic difference.

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A manufacturing method for bottle cans with improved design and reduced manufacturing steps. The can has a cylindrical body, a lower inclined portion with a linear vertical cross section, and an upper inclined portion. The lower inclined portion connects to the cylindrical body and has a specific angle and radius of curvature. This design allows forming the lower inclined portion in one step instead of multiple steps. It also allows smoothing the transition between the lower and upper inclined portions in a single step. This reduces the number of forming steps and die changes compared to traditional can shapes with multiple diameter reductions.

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Coated aluminum strips for rigid food packaging like beverage can lids that can be formed without external lubricants. The strips are made by co-extruding a polypropylene coating onto a thin aluminum strip in the H19 or H39 temper. The coating has an adhesion layer bonded to the aluminum and a surface layer for lubricity. This coating stack replaces varnish and allows stamping of the coated aluminum without external lubricants. The coating composition and thickness ranges are optimized for adhesion and lubricity.

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