Equipment for heating preforms made of thermoplastic material

Abstract

A device (1) for heating preforms (10) made of thermoplastic material, comprising a conveyor (2) for preforms (10) having a longitudinal extension axis (100), the The transfer device is intended to move the preforms along a predetermined path (200), and heating tools (3) arranged along at least a part of the predetermined path (200); the heating tools (3) include at least one A heating element (4) and at least one front reflective element (5) in order to form between them a transport tunnel for the preform (10); the heating element (4) comprises a plurality of IR (infrared) and / or NIR (near Infrared) lamps (4a); the front reflective element (5) comprises at least one profiling plate-like body to form a closer portion (6a) and Alternating of the spacer sections (6b), the plate-like body extends substantially parallel to the extension axis (100) of the preform (10).

Description

technical field

[0001] The invention relates to a device for heating preforms made of thermoplastic material. Background technique

[0002] Preforms consist essentially of a tubular body with a closed bottom at a first end and a neck forming an opening at an opposite end: these preforms are usually intended to be manufactured by blow molding said preforms in a mould. Containers, such as plastic bottles.

[0003] Usually, the neck of the preform is separated from the remaining body of the preform by so-called finishing.

[0004] Before feeding the preform into the mould, there is a heating step so that the preform is in an optimum viscosity state during the blowing step in the mold of the blowing unit.

[0005] For this reason, upstream of the blow molding unit there is an oven, usually of tunnel type, designed to heat the preforms so that their bodies have the right temperature.

[0006] Typically, ovens are constructed from a number of modules, each of which is tunnel-sh...

Examples

Embodiment Construction

[0029] With reference to the cited figures, an apparatus for heating preforms made of thermoplastic material according to the invention, generally denoted by reference numeral 1 , comprises means 2 for conveying a preform 10 having an axis 100 of longitudinal extension.

[0030] The conveyor device 2 is designed to move the preforms 10 along a predetermined path 200 .

[0031] Furthermore, the device 1 has heating means 3 arranged along at least a part of the predetermined path.

[0032] The heating tool 3 comprises at least one heating element 4 and at least one front reflective element 5 facing each other with respect to the predetermined path 200 so as to form between them a transport tunnel for the preforms 10 .

[0033] The or each heating element 4 comprises a plurality of IR (infrared) or NIR (near infrared) radiation lamps 4a.

[0034] The heating element 4 conveniently comprises a rear reflective body 4b, the extension of which relative to the predetermined path 200 ...

technical field

[0001] The invention relates to a device for heating preforms made of thermoplastic material. Background technique

[0002] Preforms consist essentially of a tubular body with a closed bottom at a first end and a neck forming an opening at an opposite end: these preforms are usually intended to be manufactured by blow molding said preforms in a mould. Containers, such as plastic bottles.

[0003] Usually, the neck of the preform is separated from the remaining body of the preform by so-called finishing.

[0004] Before feeding the preform into the mould, there is a heating step so that the preform is in an optimum viscosity state during the blowing step in the mold of the blowing unit.

[0005] For this reason, upstream of the blow molding unit there is an oven, usually of tunnel type, designed to heat the preforms so that their bodies have the right temperature.

[0006] Typically, ovens are constructed from a number of modules, each of which is tunnel-sh...

Examples

Embodiment Construction

[0029] With reference to the cited figures, an apparatus for heating preforms made of thermoplastic material according to the invention, generally denoted by reference numeral 1 , comprises means 2 for conveying a preform 10 having an axis 100 of longitudinal extension.

[0030] The conveyor device 2 is designed to move the preforms 10 along a predetermined path 200 .

[0031] Furthermore, the device 1 has heating means 3 arranged along at least a part of the predetermined path.

[0032] The heating tool 3 comprises at least one heating element 4 and at least one front reflective element 5 facing each other with respect to the predetermined path 200 so as to form between them a transport tunnel for the preforms 10 .

[0033] The or each heating element 4 comprises a plurality of IR (infrared) or NIR (near infrared) radiation lamps 4a.

[0034] The heating element 4 conveniently comprises a rear reflective body 4b, the extension of which relative to the predetermined path 200 ...

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