1. A food container comprises a cylinder body (1) and a cover body (2); the device is characterized in that the cylinder body (1) and the cover body (2) both comprise an outer shell (3) and an inner shell (4), and a foaming heat-insulating layer (5) is filled between the outer shell (3) and the inner shell (4); and heat insulation rings (6) are fixed on the end surfaces of the outer shell (3) and the inner shell (4).

2. The food container according to claim 1, wherein the foamed insulation layer (5) is a polyurethane insulation layer.

3. Food container according to claim 1, characterized in that the insulating ring (6) is made of insulating rubber.

4. The food container according to claim 1, wherein the barrel body (1) and the cover body (2) are formed with tapered projections (7) in a protruding manner on the inner and outer sides, and the heat insulating ring (6) is formed with L-shaped catches (8) which are engaged with the tapered projections (7).

5. The food container according to claim 1, wherein the top of the barrel body (1) is concavely formed with an L-shaped guide groove (9), and the upper part of the bottom end of the L-shaped guide groove (9) is communicated with a clamping groove (10); a clamping block (11) matched with the L-shaped guide groove (9) and the clamping groove (10) is convexly formed on the inner wall of the cover body (2); the cover body (2) is connected with a heat insulation sealing plate (13) through a spring (12).

6. A method of making a food container, comprising the steps of:

step one, padding a plurality of heat insulation cushion blocks in the outer shell (3) of the barrel body (1) and the cover body (2), then placing the inner shell (4) into the outer shell (3), and keeping the inner shell (4) and the outer shell (3) concentrically arranged to form a combined structure

Step two, the combined structure is placed into an outer die, and then an inner film is pressed into the inner shell (4) through an air cylinder;

pressing and fixing an end ring on the end face of the combined structure, wherein a feed inlet and a pressure release valve are formed on the end ring;

injecting a polyurethane foaming material into the feed inlet, filling the gap between the inner shell (4) and the outer shell (3) until the polyurethane foaming material is solidified, and disassembling an end ring, an inner membrane and an outer mold;

and step five, fixing a heat insulation ring (6) on the end face of the combined structure, and then installing a spring (12) and a heat insulation sealing plate (13) in the cover body (2).

Background

When a take-out person carries out a food shipment, the take-out is typically stacked in a heat-retaining box. However, the existing heat preservation box is usually made of foam plastics, so that the existing heat preservation box is easy to damage, and iron sheets or aluminum sheets are wrapped outside the foam plastics. But because it can not be completely attached to the foam, it is easy to be depressed or bulged, which affects the beauty, and the rigidity is still poor. In addition, the metal sheath can form a heat bridge, so that the overall heat insulation performance of the heat-insulating material is reduced. In addition, existing structural covers are typically threaded, and are slow to open and secure, which can affect the delivery time of the take-out.

Disclosure of Invention

In order to solve the technical problems, the invention provides a food container and a manufacturing method thereof. The food container has a simple structure, is convenient to use, can ensure the heat insulation performance of the food container through the foaming material and the heat insulation structure, and ensures the firmness of the food container by forming prestress in the food container through the pressure generated when the foaming material is foamed.

The purpose of the invention is realized by the following technical scheme:

a food container comprises a cylinder body and a cover body; the cylinder body and the cover body both comprise an outer shell and an inner shell, and a foaming heat insulation layer is filled between the outer shell and the inner shell; and heat insulation rings are fixed on the end surfaces of the outer shell and the inner shell.

In a further improvement, the foamed thermal insulation layer is a polyurethane thermal insulation layer.

In a further improvement, the heat insulation ring is made of heat insulation rubber.

In a further improvement, conical convex blocks are convexly formed on the inner side and the outer side of the cylinder body and the cover body, and L-shaped clamping protrusions matched with the conical convex blocks are formed on the heat insulation ring.

The improved structure is characterized in that the top of the cylinder body is concavely provided with an L-shaped guide groove, and the upper part of the tail end of the bottom of the L-shaped guide groove is communicated with a clamping groove; a clamping block matched with the L-shaped guide groove and the clamping groove is convexly formed on the inner wall of the cover body; the cover body is connected with a heat insulation sealing plate through a spring.

A method of making a food container comprising the steps of:

step one, padding a plurality of heat insulation cushion blocks in the outer shell of the barrel body and the cover body, then placing the inner shell into the outer shell, and keeping the inner shell and the outer shell concentrically arranged to form a combined structure

Step two, putting the combined structure into an outer mold, and then pressing the combined structure into an inner membrane in an inner shell through an air cylinder;

pressing and fixing an end ring on the end face of the combined structure, wherein a feed inlet and a pressure release valve are formed on the end ring;

injecting a polyurethane foaming material into the feed inlet, filling the gap between the inner shell and the outer shell, solidifying the polyurethane foaming material, and disassembling the end ring, the inner membrane and the outer mold;

and fifthly, fixing a heat insulation ring on the end face of the combined structure, and then installing a spring and a heat insulation sealing plate in the cover body.

The invention has the beneficial effects that:

the food container has a simple structure, is convenient to use, can ensure the heat insulation performance of the food container through the foaming material and the heat insulation structure, and ensures the firmness of the food container by forming prestress in the food container through the pressure generated when the foaming material is foamed.

Drawings

The invention is further illustrated by means of the attached drawings, the content of which is not in any way limitative of the invention.

FIG. 1 is a schematic sectional view of a food container;

fig. 2 is a schematic front structure diagram of the cylinder.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.

Example 1

As shown in fig. 1 and 2, the food container includes a barrel 1, a cover 2, an outer shell 3, an inner shell 4, a foaming insulation layer 5, an insulation ring 6, a tapered projection 7, an L-shaped clamping projection 8, an L-shaped guide groove 9, a clamping groove 10, a clamping block 11, a spring 12 and an insulation sealing plate 13.

The cylinder body 1 and the cover body 2 both comprise an outer shell 3 and an inner shell 4, and a polyurethane heat-insulating layer is filled between the outer shell 3 and the inner shell 4; and heat-insulating rubber rings are fixed on the end surfaces of the outer shell 3 and the inner shell 4.

The protruding toper lug 7 that takes shape in barrel 1 and the lid 2 inside and outside, take shape on the thermal-insulated rubber ring have with toper lug 7 complex L shape card protruding 8 to block the thermal-insulated rubber ring, and the thermal-insulated rubber ring has blocked the heat bridge between shell body 3 and the interior casing 4 and has connected, has guaranteed food container's heat-proof quality. .

An L-shaped guide groove 9 is formed in the top of the barrel 1 in an inwards concave mode, and the upper portion of the tail end of the bottom of the L-shaped guide groove 9 is communicated with a clamping groove 10; a clamping block 11 matched with the L-shaped guide groove 9 and the clamping groove 10 is convexly formed on the inner wall of the cover body 2; the lid body 2 is connected to a heat-insulating sealing plate 13 via a spring 12.

When the cover body is fixed on the barrel, the clamping block 11 is only required to be aligned with the L-shaped guide groove 9 to be pressed downwards, then the clamping groove 10 is rotated to release the hand, the heat insulation sealing plate 13 pushes the cover body 2 upwards under the elastic force of the spring, the clamping block 11 is clamped into the clamping groove 10, and when the cover body needs to be opened, the cover body can be opened quickly through reverse operation. The opening process of the cover needs to be pressed and rotated, so that the cover body is not easy to loosen during re-conveying.

The manufacturing method of the food container comprises the following steps:

a plurality of heat insulation cushion blocks are padded in the outer shell 3, then the inner shell 4 is placed in the outer shell 3, and the inner shell 4 and the outer shell 3 are kept to be concentrically arranged; then the inner film is put in, the inner film is pressed in the inner shell 4, then the end ring is fixed, and the foaming material is filled in the end ring. The foaming material extrudes the inner shell 4 and the outer shell 3 after foaming, and the foaming material and the inner shell 4 are tightly attached to the outer shell 3 to form prestress under the action of the inner film and the outer film, so that surface damages such as pits and the like can be effectively prevented when the foaming material collides with a hard object. After the foaming material is solidified, the heat insulation ring 6 is fixed on the end faces of the inner shell and the outer shell, and then the spring 12 and the heat insulation sealing plate 13 are installed in the cover body 2. The fixed heat insulation ring 6 blocks a heat bridge and ensures heat insulation performance.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.