Double-spiral extrusion EVOH (ethylene vinyl alcohol) ultrathin coating die for 160 PERT (polyethylene of raised temperature resistance) pipe

Abstract

The utility model provides a 160 PERT pipe double-spiral extrusion EVOH ultrathin coating mould, which comprises an outer mould, a mould core and a mouth mould, an outer spiral body is arranged on the inner side of the outer mould, an inner spiral body is arranged on the inner side of the outer spiral body, the mouth mould is positioned at the rear end of the outer mould, the mould core is positioned on the inner side of the mouth mould, and the mould core is also provided with an inner cavity for a pipe to pass through.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of 160 PERT tubular product double helix body extrusion EVOH ultra-thin coating mould. BACKGROUND

[0002] The processing characteristics that EVOH cannot be directly bonded with PERT tubular product at present, when PERT tubular product is bonded EVOH film, corresponding mould needs to be produced, but the existing mould production lacks the mould that EVOH can be bonded in PERT tubular product. SUMMARY

[0003] The utility model provides a kind of 160 PERT tubular product double helix body extrusion EVOH ultra-thin coating mould, including outer mould, mould core and mouth mould, the inside of the outer mould is provided with outer helix, the inside of the outer helix is provided with inner helix, the mouth mould is located at the rear end of outer mould, the mould core is located at the inside of mouth mould, it is also provided with the inner cavity for tubular product to pass through.

[0004] In one or more embodiments, a first feeding channel is provided between the outer helix and the outer mold, and the first feeding channel is connected with an EVOH feeding port.

[0005] In one or more embodiments, the first feeding channel forms a lotus petal type shunt, and the lotus petal type shunt forms 12 spiral flow channels.

[0006] In one or more embodiments, a second feeding channel is provided between the inner helix and the outer helix, and the second feeding channel is connected with a glue feeding port.

[0007] In one or more embodiments, the second feeding channel forms a lotus petal type shunt, and the lotus petal type shunt forms 12 spiral flow channels.

[0008] The utility model has the advantages that: 1. After extrusion, EVOH material flows on the outer helix, the outer helix adopts lotus petal type shunt to form 12 spiral flow channels, and the specific shunt circumferential direction is uniform and has no dead angle, which is suitable for extrusion production of ultra-thin layer thickness (0.005-0.01 MM) material.

[0009] 2. After extrusion, glue material flows on the inner helix, and the inner helix also adopts lotus petal type shunt to form 12 spiral flow channels, and the specific shunt circumferential direction is uniform and has no dead angle, which is suitable for extrusion production of ultra-thin layer thickness (0.005-0.01 MM) material.

[0010] 3. After EVOH and glue are fused in the co-extrusion mould, they are evenly coated on the surface of PERT tubular product through the gap between the mouth mould and the mould core, which can increase the EVOH oxygen barrier layer on the ordinary PERT tubular product.

[0011] 4. According to the processing characteristics that EVOH and PERT pipe material cannot be directly bonded, the double helix body extrusion EVOH ultra-thin coating mold device can perfectly solve the defects that other coating mold devices cannot uniformly produce ultra-thin EVOH layer. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a schematic diagram of a double helix body extrusion EVOH ultra-thin coating mold for 160 PERT pipe material. DETAILED DESCRIPTION

[0013] The application scheme will be further described as follows in combination with the drawings:

[0014] Referring to the drawings Figure 1 A double helix body extrusion EVOH ultra-thin coating mold for 160 PERT pipe material, comprising an outer mold 1, a mold core 2 and a die 3, the inner side of the outer mold 1 is provided with an outer helix body 4, the inner side of the outer helix body 4 is provided with an inner helix body 5, the die 3 is located at the rear end of the outer mold 1, and the mold core 2 is located at the inner side of the die 3, which is further provided with an inner cavity 8 for pipe material to pass through.

[0015] Further, a first feeding channel 41 is arranged between the outer helix body 4 and the outer mold 1, and the first feeding channel 41 is connected with an EVOH feeding port 6.

[0016] Further, the first feeding channel 41 forms a lotus petal type shunt, and the lotus petal type shunt forms 12 spiral flow channels.

[0017] Further, a second feeding channel 51 is arranged between the inner helix body 5 and the outer helix body 4, and the second feeding channel 51 is connected with a glue feeding port 7.

[0018] Further, the second feeding channel 51 forms a lotus petal type shunt, and the lotus petal type shunt forms 12 spiral flow channels.

[0019] Preferably, the die 3 and the mold core 2 cooperate with an extrusion channel 21, and the extrusion channel 21 is connected with the first feeding channel 41 and the second feeding channel 51.

[0020] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0021] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0022] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0023] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0024] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0025] The above preferred embodiments should be regarded as illustrative examples of the embodiments of the present application. Any technical deductions, substitutions, improvements, etc. that are similar to or based on the present application should be considered within the scope of protection of this patent.

Claims

1. A double-helix extrusion EVOH ultra-thin coating die for 160PERT pipes, characterized in that, It includes an outer mold, a mold core, and a die. The outer mold has an outer spiral body on its inner side and an inner spiral body on its inner side. The die is located at the rear end of the outer mold, and the mold core is located inside the die. It also has an inner cavity for the pipe to pass through.

2. The 160PERT pipe double-helix extrusion EVOH ultra-thin coating die according to claim 1, characterized in that, A first feeding channel is provided between the outer spiral body and the outer mold, and the first feeding channel is connected to the EVOH feeding port.

3. The 160PERT pipe double-helix extrusion EVOH ultra-thin coating die according to claim 2, characterized in that, The first feed channel forms a lotus petal-shaped diversion channel, which in turn forms 12 spiral channels.

4. The 160PERT pipe double-helix extrusion EVOH ultra-thin coating die according to claim 1, characterized in that, A second feeding channel is provided between the inner spiral and the outer spiral, and the second feeding channel is connected to the glue inlet.

5. The 160PERT pipe double-helix extrusion EVOH ultra-thin coating die according to claim 4, characterized in that, The second feed channel forms a lotus petal-shaped diversion channel, which in turn forms 12 spiral channels.

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