RU46999U1 - PROTECTIVE DEVICE FOR PACKING OF METAL PRODUCTS - Google Patents

Abstract

The device relates to packaging equipment and can be used to protect against dynamic effects during loading and unloading and transportation of heavy bulky goods. For example, metal: rolls and packs of metal, bundles of pipes, sandwich panels, as well as to protect gearboxes, electric motors, etc. The purpose of the device is to increase the reliability of protection and ease of packaging of products and optimization of metal packaging. A protective device for packaging metal products, having the form of a protected surface of the product, made of monolithic or porous material, the elastic modulus of which is less than the reduced modulus of elasticity of the protected product, characterized in that it is made of several elements made of a moisture-proof material with a density of at least 300 kg / m ³ , their sizes must correspond to the dimensions of the protected surfaces of the product, and the thickness of each element is selected from the ratio:

> a × sinα

where: d is the thickness of the element;

a is the absolute value of the shear deformations of the element upon impact;

α is the angle between the surface to be protected and the direction of impact.

Description

The utility model relates to packaging technology and can be used to protect against dynamic effects during loading and unloading and transportation of heavy bulky goods. For example, metal: rolls and packs of metal, bundles of pipes, sandwich panels, in addition to gearboxes, electric motors, etc.

It is known A.S. No. 1364548 C. B 65 D 81/02 “Shock absorbing pad” containing a housing with an insert resting on its walls, they are in the form of a hexagon and are made of sheet material.

Disadvantages:

- product protection is achieved by bending deformations under dynamic loads, therefore, the real dimensions of the gaskets are comparable with the dimensions of the protected products. As a rule, a product with gaskets is placed in a container, and this further increases the weight and overall dimensions of the package as a whole;

- packaging for packaging heavy bulky goods is quite complex and expensive.

Closest to the claimed utility model is the utility model "Protective profile" certificate No. 25883, class. B 65 D 81/02. The protective profile has a shape corresponding to the shape of the surface to be protected, made of a monolithic or porous material, the elastic modulus of which is less than the reduced elastic modulus of the protected product.

Disadvantages:

- difficulties arising from the protection of many surfaces and products at the same time;

- the need to use profile designs, calculated on the basis of the maximum possible impacts, which leads to unnecessary costs and an increase in the weight of the protective packaging.

The aim of the proposed device is to increase the reliability of protection and ease of packaging of products and optimization of material consumption of packaging.

The proposed protective device may contain various combinations of elements depending on the shape of the protected product. The most common are the following elements:

- sheet - to protect flat, cylindrical and conical surfaces;

- hemisphere - to protect spherical surfaces;

- a hollow cylinder or cone, respectively, for cylindrical and conical surfaces;

- corner - to protect the corners of the products. Corners can be straight, curved or perforated.

Elements of other shapes may be used depending on the configuration of the protected product.

The geometric dimensions of the elements should allow to completely cover the protected areas of the product. The thickness of the elements should ensure the integrity of the element at the maximum possible values of shear deformations during impact.

Extended elements can be reinforced with threads; nets, wires, etc. This may be necessary for technological purposes in their manufacture or to provide the required tensile strength when packaging products.

In cross section, the elements can be smooth or profiled.

Given that the device is used for packaging metal products, the materials used for the manufacture of its elements must be waterproof.

The most common materials for the manufacture of elements: polyethylene, polyvinyl chloride, rubber, monolithic or foamed polyurethanes. Materials and the degree of foaming are selected from two conditions: 1) The density should be at least 300 kg / m ³ , because otherwise, the packaging volume increases sharply, which is unacceptable in terms of transportation costs. 2) The modulus of elasticity should be less than the reduced modulus of elasticity of the protected product.

Depending on the shape of the protected products, the composition and the number of elements used in the device may vary.

An example of the possible composition of the device is presented in the figure, where the device consists of two end caps 1 with flanging, two protective corners with perforation 2, one sheet 3, and a hollow cylinder 4.

Since the inner diameter of the roll is known in advance, a hollow cylinder 4 is installed with an outer diameter corresponding to the inner diameter of the roll and a length of not more than the width of the roll to protect its inner cylindrical surface. Then, corners with perforation 2 are installed at the outer corners of the roll, after which end caps with flanging 1 are placed, the outer diameter of which is no more than the outer diameter of the roll, and the outer diameter of the flanging corresponds to the inner diameter of the hollow cylinder 4. After that, the outer cylindrical surface of the roll is wrapped with sheet 3. If necessary, the gaps between the end caps 1 and the sheet 3 and between the end caps 1 and the hollow cylinder 4 can be sealed with sealant, welding, etc.

The device operates as follows.

At the time of dynamic impact, the corresponding element will begin to deform. The deformation of the element will occur until the full compensation of the impact. In different sections of the roll, the possible impact forces may differ by several orders of magnitude. For example, at the corners formed by the ends of the roll and its cylindrical surface, and the inner cylindrical surface of the roll. By choosing the geometric shape of the elements, their thickness and material, taking into account the possible deformation forces on specific surfaces, it is possible to achieve the necessary degree of product protection and packaging convenience with optimization of the material consumption of the package.

Claims (1)

A protective device for packaging metal products, having the form of a protected surface of the product, made of a monolithic or porous material, the elastic modulus of which is less than the reduced modulus of elasticity of the protected product, characterized in that it is made of several interconnected elements made of a moisture-proof material with a density of at least 300 kg / m ³ , their dimensions must correspond to the dimensions of the protected surfaces of the product, while the thickness of the element is greater than the magnitude of the shear deformations element upon impact.