A heating device for blowing a bottle embryo with a handle

Abstract

A heating device for blowing a preform with a handle, wherein a partition plate is respectively arranged at the middle of the heating zone opposite to the heating box and the heating air duct, the position of the partition plate is adjacent to the end of the handle on the preform, and a shielding plate is arranged at intervals on the partition plate on one side of the heating box along the moving direction of the preform, and the shielding plate is opposite to the position where the handle on the preform rotates to face the heating zone. During the heating process, the preform moves along the heating zone while continuously rotating around the axis, and when it rotates to face the heating element on the heating box, it will be blocked by the shielding plate, so that the heat emitted by the heating lamp cannot be directly transferred to the handle. The heating device has an extremely simple structure and cleverly separates the heating zone to adapt to the blowing of the preform, and protects the handle, so that the container bottle with a handle can be smoothly manufactured using a PET bottle blowing machine, effectively reducing the difficulty of manufacturing the PET container bottle with a handle, and also improving the processing quality and production efficiency of the container bottle.

Description

Technical Field

[0001] The invention relates to bottle blowing equipment, in particular to a heating device for blowing bottle embryos with handles. Background Art

[0002] Plastic container bottles are utensils that people often use in their daily lives. They are generally made of preforms blown by a blow molding machine. Common container bottles can be divided into two categories: those with handles and those without handles. There are two types of container bottles with handles: one is a post-handle bottle in which the handle is installed after the plastic bottle is blown, and the other is a self-handle bottle in which the handle is placed during the blowing process and the two are blown into one. The former is usually made of PET (polyethylene terephthalate) and the latter is made of HDPE (high-density polyethylene).

[0003] Bottle embryo with handle Figure 1 As shown, the two ends of the handle 102 are connected between the bottle mouth and the middle section of the bottle body of the preform 101. The HDPE material self-handled container bottle has defects such as incomplete sealing, easy damage to the bottle body and difficult control of the bottle capacity during the blowing process; while the PET material rear handle container bottle has relatively good sealing, firmness and transparent and easy to observe advantages, but the installation of its handle requires specific equipment production and installation, and it is easy to fall off after installation. This makes the manufacturer hope to combine the advantages of both and make a self-handled container bottle with PET material. However, during the working process of the PET bottle blowing machine, since the handle is already made and does not participate in the blowing, the handle part must be cooled during the heating process of the bottle preform to prevent the handle from being deformed due to high temperature. However, the current PET bottle blowing machine lacks a proper method for cooling the handle part, or the equipment used is extremely complicated, which has a great adverse effect on both the installation and setting of the bottle blowing machine and the processing process. Summary of the invention

[0004] The object of the present invention is to provide a heating device with a simple structure and suitable for a PET bottle blowing machine to make a self-handled container bottle, so as to reduce the difficulty of making the self-handled PET container bottle and improve its production quality and production efficiency.

[0005] The heating device for blowing a bottle embryo with a handle of the present invention comprises a heating box and a heating air duct for blowing cooling air, the heating box is provided with a heating zone with a heating element installed, and the heating air duct is provided with a body air outlet zone opposite to the heating zone; partition plates are installed oppositely in the middle of the heating zone and the body air outlet zone, and the position of the partition plate is adjacent to the end of the handle on the bottle embryo, and shielding plates are arranged on the partition plate on one side of the heating zone at intervals along the moving direction of the bottle embryo, and the shielding plates are opposite to the position where the handle on the bottle embryo is rotated to face the heating zone.

[0006] In the heating device for blowing a preform with a handle of the present invention, the space between the heating box and the air outlet area of ​​the heating duct is the heating area where the preform is placed and moved. One side of the heating area is a heating box with a heating element, which increases the temperature of the heating area through the heating element; and the other side of the heating area is the bottle body air outlet of the heating duct, and cooling air blows from the bottle body air outlet to the heating area, thereby avoiding continuous temperature rise in the heating area, which is conducive to keeping the heating area within the set temperature range. During the heating process of the preform, the preform moves along the heating area so that it is continuously heated and the subsequent process is carried out, and at the same time it continuously rotates around the axis so that it can be heated evenly. In this process, the partition plate divides the heating zone into two layers, one of which is opposite to the handle on the preform (temporarily referred to as the handle zone), and the other is opposite to the rest of the bottle body of the preform (temporarily referred to as the bottle body zone), thereby reducing the transfer of heat from the bottle body zone to the handle zone; at the same time, shielding plates are arranged at intervals on the partition plate, which can block the heat emitted by the heating element to prevent the heat from directly irradiating the handle. As the preform continues to rotate, the handle will face the bottle body outlet of the heating air duct and be cooled by the cooling air, thereby preventing the handle from being deformed due to excessive temperature. It can be seen that the structure of the heating device is extremely simple, but it cleverly divides the heating zone into multiple areas according to the needs of the preform and its handle to meet the needs of blowing the preform, and protects the handle, so that the PET bottle blowing machine can be used to smoothly produce a container bottle with a handle, effectively reducing the difficulty of producing a PET container bottle with a handle, and also improving the processing quality and production efficiency of the container bottle. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the structure of a bottle embryo with a handle.

[0008] Figure 2 It is a schematic diagram of the structure of a heating device for blowing a preform with a handle.

[0009] Figure 3 yes Figure 2 The schematic diagram of the working state of the heating device for blowing a bottle preform with a handle is shown.

[0010] Figure 4 It is a schematic diagram of the structure of the heating box.

[0011] Figure 5 It is a schematic diagram of the connection structure of the partition plate and the shielding plate. DETAILED DESCRIPTION

[0012] A heating device for blowing a preform with a handle comprises a heating box 1 and a heating air duct 2 for blowing cooling air, wherein a heating zone 4 with a heating element 3 installed is arranged on the heating box, and a preform body air outlet zone 5 opposite to the heating zone is arranged on the heating air duct; a partition plate 6 is installed oppositely in the middle of the heating zone and the preform body air outlet zone, and the position of the partition plate is adjacent to the end of the handle on the preform, and shielding plates 7 are arranged at intervals on the partition plate on one side of the heating zone along the moving direction of the preform, and the shielding plates are opposite to the position where the handle on the preform is rotated to face the heating zone.

[0013] In the heating device for blowing a preform with a handle, a plurality of stress relief grooves 61 are respectively formed on the two partition plates 6, and the stress relief grooves extend from the side of the partition plate close to the preform and away from the preform to the middle of the partition plate. The arrangement of the stress relief grooves can greatly reduce the probability of deformation of the partition plate in a high temperature environment, thereby ensuring the safety of the equipment, production stability and production quality.

[0014] The heating element 3 includes a plurality of heating lamps arranged in parallel. The distances between the heating lamps and the bottle preform can be set to be all the same, or different distances can be set as needed. For example, the distance between the heating lamp opposite to the handle and the bottle preform is greater than that between the other heating lamps; or the distance between the heating lamp opposite to the bottleneck of the bottle preform and the bottle preform is greater than that between the other heating lamps; thereby meeting the heating requirements of different areas and different parts of the bottle preform.

[0015] The heating box 1 is provided with an exhaust passage 11, which is connected to the space between the heating box and the heating air duct outlet area 5, that is, connected to the heating area for heating the preforms, so as to sequentially exhaust the cooling air after cooling.

[0016] The heating device for blowing a preform with a handle has a preform body cooling air machine 8 for blowing cooling air into the heating air duct 2, a cooling air duct 9 opposite to the preform mouth of the preform, and a preform mouth cooling air machine 10 for blowing cooling air into the cooling air duct. The preform body and preform mouth of the preform are cooled by different cooling air machines and air ducts respectively to meet the heating and cooling requirements of different parts of the preform. In addition, the heating box 1 and the heating air duct 2 are provided with cooling water channels 20 for passing cooling water at the ends of the heating zone 4 and the preform body air outlet zone 5. The cooling water channels on both sides extend oppositely to the connection between the preform mouth and the preform body of the preform. Therefore, the cooling water channels can separate the area where the preform mouth of the preform is located from the heating zone, so that the temperature control of the two zones is more accurate and stable. On the other hand, the preform mouth of the preform can also be cooled by the cooling water channels. At the same time, the cooling air blown out of the cooling air duct can be guided so that the cooling air is blown to the desired position more accurately.

[0017] like Figure 2-5As shown, the space between the heating box and the outlet area of ​​the heating duct is the heating area where the preform is placed and moved. The left side of the heating area is the heating area with a heating lamp and the right side is the outlet area of ​​the preform of the heating duct. At the same time, the upper part of the heating area becomes a low-temperature heating area with a lower temperature than the lower part due to the effect of the partition plate and the shielding plate, and the lower part of the heating area is called the ordinary heating area. During the heating process of the preform, the preform moves along the heating area so that it is continuously heated and undergoes subsequent processes, and at the same time, it continuously rotates around the axis so that it can be heated evenly. In this process, when the handle on the preform rotates to face the heating lamp, it will be blocked by the shielding plate, so that the heat emitted by the heating lamp cannot be directly transferred to the handle, thereby preventing the handle from being deformed due to excessive temperature.

Claims

1. A heating device for blowing a preform with a handle, comprising a heating box (1) and a heating duct (2) for blowing cooling air, the heating box being provided with a heating zone (4) on which a heating element (3) is installed, the heating duct being provided with a preform body air outlet zone (5) opposite to the heating zone, characterized in that: A partition plate (6) is installed in the middle of the heating zone and the preform air outlet zone opposite to each other, and the position of the partition plate is adjacent to the end of the handle on the preform. A shielding plate (7) is arranged on the partition plate on one side of the heating zone at intervals along the moving direction of the preform, and the shielding plate is opposite to the position of the handle on the preform when it is rotated to face the heating zone; a plurality of stress release grooves (61) are respectively opened on the two partition plates (6), and the stress release grooves extend from the side of the partition plate close to the preform to the back of the preform to the middle of the partition plate; the heating element (3) comprises a plurality of heating lamp tubes arranged in parallel; the distance between the heating lamp tube opposite to the handle and the preform is greater than the distance between the heating lamp tube and the preform. The heating box (1) is provided with an exhaust duct (11), the exhaust duct communicating with the space between the heating box and the heating duct outlet area (5); a preform body cooling fan (8) blowing cooling air into the heating duct (2), a cooling duct (9) opposite to the preform mouth of the preform, and a preform mouth cooling fan (10) blowing cooling air into the cooling duct; the heating box (1) and the heating duct (2) are provided with cooling water channels (20) for introducing cooling water at the ends of the heating area (4) and the preform body outlet area (5), and the cooling water channels on both sides extend oppositely to the connection between the preform mouth and the preform body of the bottle preform.

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