BR102012007036A2 - PROCESS FOR MAKING CONTAINERS AND PLASTIC BOXES - Google Patents

Abstract

CONTAINER AND PLASTIC BOXING PROCESS - Replacing the injection process, enabling the construction of boxes or containers with greater mechanical resistance, more hygienic inner surface, smoother outer surface and lower maintenance cost, including the steps characterized by the fact The following steps should be taken: employ flat HDPE plates that are heated and folded into jigs to form the angles (1); these angles are welded to the lower crossmembers (2 and 3) that form the lower frame of the box; on the upper part an upper frame (4) is formed forming a reinforcement edge; the bottom (5) of the housing is welded to the angles (1) and the lower crossmembers (2 and 3); the sides are assembled from flat plates (7 and 8) which are welded to the angles (1), lower crossmembers (2 and 3) and upper frame (4) and the box to receive reinforcing straps (9 and 10) arranged on the sides, front and back, these straps being welded together these parts.

Description

PROCESS FOR MAKING CONTAINERS AND PLASTIC BOXES TECHNICAL FIELD

The following descriptive report for the invention relates to the development of a process employed for the manufacture of HDPE containers and plastic boxes in place of the injection process, enabling the construction of boxes or containers with higher mechanical strength, more hygienic inner surface, outer surface. smoother and lower maintenance cost.

TECHNICAL STATE

Boxes / bins are containers used to transport food products such as fruits and vegetables; industrial products, parts etc. These containers are made of high density polyethylene (HDPE) 1 so they are lighter, easier to clean, have longer life, withstand high and low temperatures and can be used in agriculture, agroindustry and industry in general.

Containers receive anti-UV (ultraviolet rays) treatment, which allows their use outdoors and a shelf life of up to 10 years, depending on the intensity of use. They are fully recyclable, easy to clean, have high individual strength (over 500 kg) and can be stacked up to 10 units.

Other advantages of using bins are:

- less damage to fruits and food;

- lower maintenance cost; - more hygienic;

- better product storage and movement through stacking;

- lower expenses with fungicides;

- perfect fit that prevents falls;

- resistant to immersion in saline solutions;

- do not favor the development of pathogens;

- do not require protection or internal lining.

These containers can have their side surface and bottom part closed, for packaging wetter products such as meat, chicken and

fish; They can also store fruit. Also, they may have hollow side surfaces for wrapping vegetables.

These monoblock containers are manufactured by the process of injecting HDPE into a die. As with any die injection process, this die must match the dimensions of the part that will be

resulting from the production process. Thus, the matrix for a large box is very expensive.

Another problem with these containers is the need to make reinforcing ribs throughout the side surface of the part. These ribs decrease material expense, decrease box weight and reinforce structure. Same

With all precautions, one-piece containers cannot withstand long-term mishandling. Cracks, cracks in the bottom, loss of pieces of the boxes are common, and to make these repairs a lot of time of concert and specialized labor. Cited Patent Documents US 6,631,821; US 5,236,099; US 2011/0180533; US 6,021,916; US 2008/0237251; US 5,460,292 and US 5,531,352. DISCUSSION

The purpose of the presented process is to describe a means for constructing bins from flat HDPE sheets, HDPE sheets that are bent to form the gussets, reinforcement straps disposed on the sides, reinforced edge and fitted feet, with no need for injection. Full box. The construction process from HDPE sheets does not involve the complexity of an injection process in a large matrix; but it can result in a case with smooth inner and outer walls, case bottom with thicknesses that can vary significantly larger than those built by injection, increasing the resistance to cracking and cracking, which gives them a longer service life because Cracks and breaks are more frequent at the bottom of the boxes.

There are bins that feature smooth inner walls and low-ribbed outer walls, but are the result of injection processes into a large mold. This process of constructing bins from HDPE flat sheets is not similar in the prior art.

List of Figures

The characterization of the present patent document is made by means of representative drawings of the process for making containers and plastic boxes, such that the process can be fully reproduced by suitable technique, allowing full characterization of the functionality of the claimed object.

From the elaborated figures that express the best way or preferential way to realize the product idealized now, the descriptive part of the report is based, through a detailed and consecutive numbering, where it clarifies aspects that can be understood by the adopted representation, of clearly determine the intended protection.

These figures are for illustration purposes only and may vary,

as long as they do not escape the initially claimed.

In this case one has to:

- Figure 1 illustrates a perspective view of a bin made using the

process object of this invention;

- Figure 2 shows the front orthogonal view of the plastic box, where are the

reinforcement straps;

- Figure 3 shows the lateral orthogonal view of the box, where the

reinforcement straps;

- Figure 4 shows the top view of the box.

DESCRIPTION

The plastic box construction process employs HDPE flat plates which are heated and folded into jigs to form the angles (1). To these angles are welded the lower crosspieces (2 and 3) that form the lower frame of the box. At the top is mounted an upper frame (4) forming a reinforcing edge. The bottom (5) of the housing is welded to

gussets (1) and the lower crossmembers (2 and 3). This bottom can have varying thicknesses depending on the weight requirement the box will support. This bottom (5) has no sharp corners in relation to the sides, being welded to them by means of a cord that leaves this bulging finish (6). The sides are mounted from flat plates (7 and 8) which are welded to the angles (1), lower crossmembers (2 and 3) and upper frame (4). As in relation to the bottom, the joint of two consecutive sides in a corner is welded and prepared to be rounded (11). This way, no points are created at the bottom and sides for residue accumulation. The box receives reinforcing straps (9 and 10)

arranged on the sides, front and back, these straps being welded together these parts. The angles are perforations near the floor (11) to receive the support feet (12) of the box.

After the box is assembled with all welded parts, the sanding and finishing step is completed. Sanding removes burrs and parts that

have been raised in relation to the other elements. After sanding a UV protector is applied to prevent cracking of the weld parts, as the plates are already anti-UV type.

* * *

Claims (5)

1. PROCESS FOR MAKING CONTAINERS AND PLASTIC BOXES, characterized by having the following steps: - employ flat HDPE plates that are heated and folded in jigs to form the angles (1); - these angles are welded to the lower cross members (2 and 3) that form the lower frame of the box; - an upper frame (4) forming a reinforcing edge is mounted on the upper part; - the bottom (5) of the housing is welded to the gussets (1) and the lower crossmembers (2 and 3); - the sides are mounted from flat plates (7 and 8) which are welded to the angles (1), lower crossmembers (2 and 3) and upper frame (4) and; - the housing receives reinforcing straps (9 and 10) disposed on the sides, front and back, these straps being welded together with these parts. A process for making containers and plastic boxes according to claim 1 and characterized in that the bottom (5) may be of varying thickness depending on the weight requirement the box will support. A process for making containers and plastic boxes according to claim 2 and characterized in that the bottom (5) has no sharp corners in relation to the sides and is welded to them by means of a cord that leaves this bulging finish (6). ). A process for making containers and plastic boxes according to claim 1 and characterized in that the joining of two consecutive sides in a corner is welded and prepared to be rounded (11). A process for making containers and plastic boxes according to claim 1 and characterized in that the angles are drilled close to the floor (11) to receive the support feet (12) of the box. * * it