Antitheft bottle lid pressure-controlled injection molding method

A technology of injection molding and anti-theft bottle caps, which is applied to household components, household appliances, and other household appliances. It can solve the problems of relatively high requirements, and achieve the effects of simple and efficient operation, excellent product performance, and excellent tensile strength.

Inactive Publication Date: 2019-06-18
JIANGSU GAIZHIBAO PACKAGING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, injection molding has relatively high requirements for raw materials. Finding suitable raw materials and suitable injection molding methods designed for raw materials has always been a difficult problem in the production practice of anti-theft bottle caps.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: The raw material of the anti-theft bottle cap of this embodiment is 90 parts of high-density polyethylene, the melt flow rate of high-density polyethylene is 1.0g / 10min, and the density is 0.95g / cm 3 ; 1 part of polyethylene color masterbatch, the pigment content is 35%; 1 part of 2,6-di-tert-butyl-4-methylphenol; 1500rpm, grinding time 30min; 1 part of calcium stearate.

[0021] The pressure-controlled injection molding method for the anti-theft bottle cap of this embodiment includes the following steps: (1) Prepare according to 90 parts of high-density polyethylene, 1 part of color masterbatch, 1 part of antioxidant, 1 part of adsorbent, and 1 part of lubricant (2) Heating the barrel to 200°C to heat the granular raw material to a viscous liquid melt; (3) Rapidly advancing the screw to inject the molten plastic into the mold cavity and Fill the cavity; (4) After the molten plastic cools and shrinks, slowly push the screw to replenish the molten plastic ...

Embodiment 2

[0023] Embodiment 2: The raw material of the anti-theft bottle cap of this embodiment is 100 parts of high-density polyethylene, the melt flow rate of high-density polyethylene is 4.5g / 10min, and the density is 0.96g / cm 3 6 parts of polyethylene color masterbatch, the pigment content is 55%; 4 parts of three (1,4-di-tert-butylphenyl) phosphite; 3000rpm, grinding time 60min; 4 parts of zinc stearate.

[0024] The pressure-controlled injection molding method for the anti-theft bottle cap of this embodiment includes the following steps: (1) Prepare according to 100 parts of high-density polyethylene, 6 parts of color masterbatch, 4 parts of antioxidant, 3 parts of adsorbent, and 4 parts of lubricant (2) Heating the barrel to 240°C to heat the granular raw material to a viscous liquid melt; (3) Rapidly advancing the screw to inject the molten plastic into the mold cavity and Fill the cavity; (4) After the molten plastic cools and shrinks, slowly push the screw to replenish the mo...

Embodiment 3

[0026] Embodiment 3: The raw material of the anti-theft bottle cap of this embodiment is 92 parts of high-density polyethylene, the melt flow rate of high-density polyethylene is 2.5g / 10min, and the density is 0.955g / cm 3 ; 2 parts of polyethylene color masterbatch, the pigment content is 40%; 2 parts of 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl) isocyanuric acid; 2 parts of molecular sieve, after ball milling surface treatment by means of ball milling, with a grinding speed of 1600 rpm and a grinding time of 40 min; 2 parts of calcium stearate.

[0027] The pressure-controlled injection molding method for the anti-theft bottle cap of this embodiment includes the following steps: (1) Prepare according to 92 parts of high-density polyethylene, 2 parts of color masterbatch, 2 parts of antioxidant, 2 parts of adsorbent, and 2 parts of lubricant (2) Heating the barrel to 220°C to heat the granular raw material to a viscous liquid melt; (3) Rapidly advancing the screw to inject ...

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Abstract

The invention discloses an antitheft bottle lid pressure-controlled injection molding method. The method comprises the following steps: (1) raw materials are prepared according to high-density polyethylene, color master batches, antioxidants, absorbing agents and lubricating agents; and raw material particles are put in a charging barrel; (2) the charging barrel is heated; and the granular raw materials are heated as viscous-state melts; (3) through quick pushing by a screw rod, melt plastic is injected in a mold cavity and fully filled in the cavity; (4) the melt plastic is slowly pushed intoa screw rod for feeding after cooling shrinkage until the mold cavity is fully filled with the cooled melt plastic; (5) bottle lid products are ejected out from the mold cavity to fall on a conveyingbelt, and are cooled to the room temperature; and the surfaces of the bottle lids are sterilized; (6) the spot checking is performed on the bottle lids; and (7) the bottle lids are packed to obtain final bottle lid products. The method has the beneficial effects of simple and efficient operation and excellent product performances.

Description

technical field [0001] The invention relates to the field of bottle cap injection molding, in particular to a pressure-controlled injection molding method for an anti-theft bottle cap. Background technique [0002] Anti-theft bottle caps are widely used in bottle packaging, especially in the field of beverages; anti-theft bottle caps are provided with a ring-shaped anti-leakage ring on the inner wall of the top, and the lower end of the bottle cap is connected to an anti-theft ring through tension reinforcement ribs. Evenly distributed with a number of sheet-shaped swing pull wings. [0003] There are two ways to produce anti-theft bottle caps: compression molding and injection molding. Compression molding cannot form the entire cap body in one piece, and it needs to be processed later. Injection molding can be formed at one time, which improves production efficiency and product performance. However, injection molding has relatively high requirements for raw materials. Fin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/00C08J3/22C08L23/06C08K5/098B29L31/56
Inventor 罗平潘霞
Owner JIANGSU GAIZHIBAO PACKAGING TECH CO LTD
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