CN209738451U - heat insulation structure - Google Patents

Abstract

The utility model discloses a thermal insulation structure, which comprises a rotationally molded PE shell interlayer in a hollow structure, an EPE connection layer is attached to the inner surface of the PE shell interlayer, and the inside of the EPE connection layer is filled with PU foam Filling layer; the EPE connection layer is welded together with the inner surface of the PE shell interlayer; the PU foam filling layer is bonded together with the EPE connection layer. PE shell interlayer, EPE connection layer, and PU foam filling layer constitute a composite thermal insulation structure to form a solid whole. The strength is greatly improved, and the deformation resistance is increased. It is not easy to deform, bulge or delaminate after repeated use.

Description

Thermal insulation structure

technical field

The utility model relates to a thermal insulation structure, in particular to a thermal insulation box.

Background technique

In addition to the storage function of ordinary storage boxes, the incubator also has a heat preservation function, which is used for refrigeration or heat insulation, such as for storing dry ice. Existing insulated box, its box wall adopts PE as the plastic shell, and the interior is filled with PU hard foam as the structure of the heat-insulating filling material. It cannot be well combined to form a solid whole, and it is easy to deform, debond, bulge, etc. during use. If it is used to hold items with fixed dimensions, such as dry ice with a fixed shape, once the box wall is deformed or If there is a bulge inside, it will affect the packing capacity. In particular, when the PE shell interlayer is damaged during use, water stains will directly penetrate into the PU hard foam to destroy the heat insulation layer and directly cause the box to be scrapped. Furthermore, in the existing incubators, in order to improve the protection of the PU hard foam, the interlayer of the PE shell is usually thicker, resulting in a large weight of the box and high manufacturing costs.

Utility model content

The utility model provides a thermal insulation structure, which overcomes the shortcomings of the background technology. The technical scheme that the utility model solves its technical problem adopts is:

The thermal insulation structure includes a rotationally molded PE shell interlayer with a hollow structure, the inner surface of the PE shell interlayer is attached with a layer of EPE connection layer, and the inside of the EPE connection layer is filled with a PU foam filling layer; the EPE connection The layers are welded together with the inner surface of the PE shell interlayer; the PU foam filling layer is bonded with the EPE connecting layer.

A preferred embodiment: the EPE connecting layer is directly foamed by EPE material by means of the heat of rotational molding of the PE shell interlayer.

A preferred embodiment: the PU foam filling layer is formed by foaming PU foam material through a high-pressure foam machine.

A preferred embodiment: the thickness of the PE shell interlayer is 3-5mm, the thickness of the EPE connection layer is 5-10mm, and the thickness of the PU foam filling layer is ≥ 40mm.

Compared with the background technology, this technical solution has the following advantages:

1. The EPE connection layer is between the PE shell interlayer and the PU foam filling layer. The EPE connection layer can be well combined with the PE shell interlayer interlayer, and can also be well combined with the PU foam filling layer. In this way, the interlayer of the PE shell interlayer, the EPE connection layer, and the PU foam filling layer form a composite thermal insulation structure to form a solid whole, the strength is greatly improved, the deformation resistance is increased, and it is not easy to deform, bulge or fall off after repeated use. Floor.

2. The EPE connecting layer forms a second protective layer inside the interlayer of the PE shell. In actual use, it can improve the strength and toughness of the interlayer of the PE shell, so that the interlayer of the PE shell and the EPE connecting layer can also foam the PU. The filling layer is better protected and the service life of the product is improved.

3. In the case of the same strength requirements, the thickness of the interlayer of the PE shell interlayer can be reduced to 2mm, reducing the amount of PE, which can reduce the cost and product weight.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 depicts a schematic diagram of the thermal insulation structure of the present invention.

Detailed ways

Please refer to Fig. 1, the thermal insulation structure includes a rotationally molded and hollow PE shell interlayer 10, the inner surface of the PE shell interlayer is attached with a layer of EPE connection layer 20, and the inside of the EPE connection layer is filled with PU foam filler. Layer 30. The polarity of the EPE material is between the polarity of the PE material and the PU material, which can play a very good connection role, connecting the PE shell interlayer 10 and the PU foam filling layer 30 into a whole, and the thermal insulation of the EPE material The performance is better than that of PE material, which can improve the thermal insulation performance of the product.

The EPE connection layer 20 is fused with the inner surface of the PE shell interlayer 10 . The PU foam filling layer 30 and the EPE connecting layer 20 are bonded together.

The thickness of the PE shell interlayer 10 is 3-5mm, the thickness of the EPE connecting layer 20 is 5-10mm, and the thickness of the PU foam filling layer 30 is ≥40mm.

The forming method of the thermal insulation structure is to pre-form the PE shell interlayer 10 with a hollow structure by using a rotomolding machine; EPE particles (that is, expandable PE particles) are injected into the PE shell interlayer 10 in the filling holes, and the rotomolding machine drives the PE shell interlayer 10 to roll, so that the EPE particles are evenly covered with the PE shell interlayer 10, and the temperature of the PE shell interlayer 10 itself promotes the foaming of the EPE particles to form the EPE connection layer 20, and the EPE connection layer 20 is welded on the inner surface of the PE shell interlayer; then, the PE shell interlayer 10 and The EPE connection layer 20 attached to the inner surface of the PE shell interlayer is removed from the rotomolding machine and cooled and shaped. Finally, the cooled PE shell interlayer and the EPE connection layer are placed in the PU mold, and the PU foam is injected by a high-pressure foaming machine. The material is foamed, and the PU foam material is foamed and molded inside the EPE connection layer 20 to obtain a PU foam filling layer 30 that fills the inner cavity of the EPE connection layer. The foamed PU foam filling layer 30 and the EPE connecting layer 20 are bonded together.

The above is only a preferred embodiment of the utility model, so the scope of implementation of the utility model cannot be limited accordingly, that is, the equivalent changes and modifications made according to the patent scope of the utility model and the contents of the specification should still belong to this utility model. within the scope of utility models.

Claims (4)

1. Adiabatic insulation construction, include rotational moulding shaping and be hollow structure's PE shell intermediate layer, its characterized in that: the inner surface of the PE shell interlayer is attached with an EPE connecting layer, and a PU foaming filling layer is filled in the EPE connecting layer; the EPE connecting layer is welded with the inner surface of the PE shell interlayer; the PU foaming filling layer is bonded with the EPE connecting layer.

2. The heat insulating and preserving structure as claimed in claim 1, wherein: the EPE connecting layer is formed by directly foaming EPE materials by means of heat generated by rotational molding of the PE shell interlayer.

3. The heat insulating and preserving structure as claimed in claim 1, wherein: the PU foaming filling layer is formed by foaming PU foaming materials through a high-pressure foaming machine.

4. The heat insulating and preserving structure as claimed in claim 1, wherein: the thickness of the PE shell interlayer is 3-5mm, the thickness of the EPE connecting layer is 5-10mm, and the thickness of the PU foaming filling layer is more than or equal to 40 mm.