LT5959B - Cardboard pallet and its production method - Google Patents

Abstract

The invention is related to transportation of loads and can be used in different fields of industry where can be loaded and transported different loads, such as fishing goods, boxes, rolls, packages, furniture parts, wood blanks, and etc. Cardboard pallet consists of top panel and several lower boards; in between it is set light and rigid hollow boned support. The boned support, located between upper and lower plates are made of corrugated cardboard glued layers, which components are cardboard tubes, in order to increase resistance to compression are positioned vertically. In production of cardboard pallet, at first is produced elongated hollow supports of corrugated cardboard. The supports are made by wrapping the strip of corrugated cardboard on to metal or other material form, wrapping the strip on the form till the support reaches required size. While the strip is winded on its surface is sprayed or applied the adhesives. Wrapping corrugated cardboard on to form it is needed to keep uniform strip stretching rate and tensile strength.

Description

The invention is intended to facilitate the transport of goods and can be used in a variety of industries where various products can be loaded and transported, such as finished goods, boxes, rolls, packages, furniture parts, timber products and the like.

There are various cardboard pallets for cargo transportation. Among the known analogs, the closest pallet is described in European Patent EP 1,588,952. The supports of the cardboard pallet described in this patent consist of cardboard tubes. The disadvantages of a pallet made in this way are: insufficient hydraulics, too little resistance and too much weight.

The object of the present invention is to provide a cardboard pallet of higher hydraulics and higher mechanical strength as well as to create a series of pallets of various hydraulics.

This purpose is achieved by the use of ultra-lightweight and extremely strong hollow-glued supports made of corrugated cardboard layers, and the inner cavity of the supports incorporates one or more cylindrical cardboard inserts made of corrugated cardboard layers having a height so that they rest on both the upper, both to the inner surfaces of the lower plate.

In addition, the inner surface of the top and bottom panels has perforated openings at cardboard support adhesive sites with a depth of 2.0 to 4.0 mm and a diameter of 1.0 to 3.0 mm. Also, the inner surfaces of the top and bottom panels of the pallet have recesses to accommodate the upper and lower ends of the supports with a depth of 2.0 to 4.0 mm, and the recesses of these recesses have perforated holes with a depth of 2.0 up to 4.0 mm.

The novelty of the cardboard pallet production method is related to the production of corrugated cardboard glued supports. For the production of corrugated board glued supports, the tensile strength of the tape shall be uniform at all points and shall be between 0.2 m / s and 0.5 m / s and the tensile strength of the corrugated board shall not exceed 3.0 kG and shall be uniform throughout the stretching process.

The following drawings illustrate the invention:

FIG. 1 is an isometric view of a tray;

FIG. 2 is an isometric view of a hollow corrugated cardboard support;

FIG. 3 is an isometric view of an inner cylindrical corrugated cardboard support;

FIG. 4 isometric view of hollow supports with corrugated cardboard cylinders embedded in the inner cavity of the support.

The cardboard pallet consists of an upper plate and a number of lower plates, between which are placed lightweight and extremely strong hollow glued supports. An isometric view of the tray is shown in FIG. 1. The hollow supports between the top and bottom panels are made of corrugated cardboard adhesive layers consisting of cardboard tubes arranged vertically for greater compressive strength. A general view of the hollow support is shown in FIG. 2.

Depending on the required hydraulic capacity, only hollow supports may be used in the construction of the cardboard pallet. In order to achieve greater cavity, one or more internal cylindrical corrugated cardboard inserts having the same design as the hollow supports may be used in the inner hollow support cavity, but only in dimensions that fit within the inner cavity of the hollow support. The height of the cylindrical inserts must be such that they rest on the inner surface of both the upper and lower panels. A general view of the cylindrical inner supports is shown in FIG. 3, and their position in the inner cavity of the hollow supports is shown in FIG. 4.

Cylindrical supports can also be used instead of the main hollow corrugated cardboard supports.

For greater monumentality and integrity of the entire structure, the upper and lower supports, where the ends of the supports are in contact with the inner surfaces of the pallets, have perforations with a depth of 2 to 4 mm and a diameter of up to 4 mm. The purpose of these perforations is to fill the perforated cavities with glue, thereby achieving greater rigidity and monolithic integrity of the entire structure.

The cardboard pallet supports support both medium weight and heavy loads. The pallet tests carried out have confirmed the durability of these products. Another important feature of the product is its moisture resistance. The use of high moisture resistance materials and cardboard layering allow the product to operate under a variety of environmental conditions.

The pallet's reliability has been tested under realistic conditions of use to make the best decision. Cardboard pallets are made from recyclable materials. They can be recycled with other cardboard products. When burning pallets, no harmful substances are released into the environment.

The main advantages of the pallets offered are:

• low weight of packaging;

• No need to disinfect pallets against insects;

• convenient storage;

• Easy preparation of pallets of desired size;

• suitability for recycling.

Cardboard pallet hydraulics are adequate for wooden pallets.

The method of making a cardboard pallet is as follows:

The production of the proposed pallet requires only two types of raw materials: plain corrugated board and urea glue.

First, the elongated hollow supports are made of corrugated cardboard. The supports are made by corrugating the corrugated cardboard tape on a metal or other material form, by wrapping the tape on the shape until the support reaches the required dimensions. When wrapping the tape, glue is sprayed or lubricated on its surface. When wrapping corrugated cardboard on the mold, a uniform tensile speed of the tape of 0.2 m to 0.5 m per second must be maintained. The tensile force shall also be constant throughout the tension and shall not exceed 3.0 kG.

Corrugated cardboard tubes may be deformed at different tensile speeds or tensile strengths, which will cause the supports to lose some of their resistance.

Next, the formed workpiece billet is cut into the required lengths. The corrugated cardboard supports are then heat treated.

In the production of the pallet itself, the supports are placed on perforated areas on the inner surface of the lower plate, which must be completely filled with glue. In the same way the top plate is placed on the supports.

If the perforated surfaces of both panels are well filled with glue, we will obtain a rigid monolithic solid construction with high resistance.

The collected cardboard pallets are heat treated and then impregnated.

Depending on the loading and transport conditions, the cardboard pallet can be used as a disposable or multiple use.

Such cardboard pallets can withstand very heavy weight: static hydraulics up to 18 tons and dynamic up to 1200 kg.

Cardboard pallets are also environmentally friendly: used pallets can be recycled as a secondary raw material in the paper and board industry.

Claims (7)

DEFINITION OF INVENTION 1. A cardboard pallet having upper and lower cardboard panels glued together with cardboard supports between them, characterized in that the elongated hollow cardboard supports are glued from corrugated cardboard layers. A carton according to claim 1, characterized in that one or more cylindrical cardboard inserts are formed in the inner cavity of the supports, which are made of corrugated cardboard adhesive layers, the height of which must rest on both the inner surfaces of the top and bottom panels. . 3. The carton according to claim 1, 2, wherein the top and bottom of the panels have perforated openings having a depth of 2.0 to 4.0 mm and a diameter of 1.0 to 3 at the points of application of the cardboard supports. , 0 mm. Cardboard pallet according to claims 1, 2, 3, characterized in that the inner surfaces of the upper and lower panels of the pallet have recesses to accommodate the upper and lower ends of the supports having a depth of 2.0 to 4.0 mm. 5. The carton according to claim 1, 2, 3, 4, characterized in that the recesses on the top and bottom panels of the pallet have perforated openings with a depth of 2.0 to 4.0 mm. 6. The method of making a cardboard pallet, characterized in that in the production of corrugated cardboard glued supports, the tensile speed of the tape shall be uniform at all points and shall be in the range of 0.2 m / s to 0.5 m / s. 7. The method of manufacture of a carton according to claim 6, characterized in that the tensile strength of the corrugated cardboard strip should not exceed 3.0 kG and must be maintained uniform throughout the stretching process.