CN111283986A

CN111283986A - Bottle blank heating mechanism with handle

Info

Publication number: CN111283986A
Application number: CN202010270738.5A
Authority: CN
Inventors: 邓志军; 邹大群; 宋奎伟; 李冬
Original assignee: Guangzhou Tech Long Packaging Machinery Co Ltd
Current assignee: Guangzhou Tech Long Packaging Machinery Co Ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2020-06-16

Abstract

A heating mechanism for bottle blank with handle features that the heating region is divided into a low-temp heating region and a ordinary heating region by the first and second handle protecting plates, the power of heating lamp tube in said low-temp heating region and the power of heating lamp tube in ordinary heating region are regulated to control the radiation energy and temp of heating lamp tube in each region to plastic bottle blank. The low-temperature heating of the handle part can be realized, so that the problem that the handle of the PET plastic bottle blank with the handle becomes soft and deformed due to heating is avoided, and the bottle blowing quality is ensured.

Description

Bottle blank heating mechanism with handle

Technical Field

The invention relates to the field of bottle blowing processing equipment, in particular to a bottle blank heating mechanism with a handle.

Background

At present, plastic bottles with handles (especially plastic milk bottles) in the market are roughly divided into HDPE plastic bottles with handles and PET plastic bottles with rear handles, wherein the HDPE plastic bottles with handles are integrally formed, and the PET plastic bottles with handles are mounted at the rear parts of the bottles. For HDPE plastic bottles, there are three problems: firstly, the plastic bottle made of HDPE material can only be formed by extrusion blow molding (the process flow is the processes of PE resin raw material → sol → parison extrusion → mold closing → air blowing → pressure maintaining → cooling → mold opening → product taking out (trimming) and the like) because of the material forming performance, the mold structure is complex and the cost is high, the cost of a single set of mold is more than one time of that of the PET material mold, and the yield is low; the HDPE plastic bottles are not firm enough and are easy to damage, and an additional turnover box is required to be added in the transportation and storage processes for placing the HDPE plastic bottles, so that the transportation cost of a manufacturer is increased, and a larger storage space is required; thirdly, the waste is much, and the product needs to be finished in the later period; fourthly, the resin material is more, and the resin material is 30 percent of the PET resin material with the same specification; fifthly, the HDPE material has poor oxygen resistance, and the contained milk is easy to oxidize and deteriorate. In the case of the PET plastic bottle, injection stretch blow molding (process flow: PET resin raw material → drying → glue melting → high pressure injection molding → pressure maintaining → cooling → mold opening → blank ejection → temperature adjustment of tube blank → mold closing → stretch blow molding → pressure maintaining → cooling → mold opening → product removal) is adopted, which can solve the above problems of the HDPE plastic bottle and has the advantages of good sealing performance, strong bottle, high oxygen barrier performance, transparency and easy observation, but the handle of the PET plastic bottle needs to be produced and mounted on the plastic bottle by specific equipment, thus the production cost needs to be increased additionally. In summary, the skilled in the art considers that the PET plastic bottle with the handle is used to replace the HDPE plastic bottle with the handle, however, the handle of the PET plastic bottle preform with the handle does not participate in the bottle blowing process, and therefore, the handle portion of the plastic bottle preform must be subjected to technical treatment during the heating process to prevent the PET plastic bottle with the handle from being deformed after being softened due to the high temperature of the handle portion during the bottle blowing process, and further prevent the bottle blowing failure of the PET plastic bottle with the handle.

Disclosure of Invention

The invention aims to provide a heating mechanism which can prevent a handle of a PET plastic bottle blank with the handle from deforming due to high-temperature softening in the bottle blowing process.

The invention relates to a bottle blank heating mechanism with a handle, which comprises a heating box provided with a heating lamp tube and a heat insulation plate arranged at the bottom of the heating box, wherein a reflecting plate mounting frame opposite to the heating box is arranged on the heat insulation plate; the heating box is characterized in that a first handle protection plate is arranged on the reflection plate mounting frame, a second handle protection plate is arranged on the heating box, the first handle protection plate is opposite to the second handle protection plate, and a space for the plastic bottle blank to pass through is formed between the first handle protection plate and the second handle protection plate, the heating area is divided into a low-temperature heating area and a common heating area by the first handle protection plate and the second handle protection plate, the low-temperature heating area is opposite to the handle part of the plastic bottle blank, and the common heating area is opposite to the blank part below the plastic bottle blank handle.

The invention relates to a bottle blank heating mechanism with a handle, wherein a plurality of heating lamp tubes are arranged on the side wall of a heating box from top to bottom, a heating area is divided into a low-temperature heating area and a common heating area by a first handle protection plate and a second handle protection plate, the low-temperature heating area is opposite to the handle of a plastic bottle blank, the common heating area is opposite to a blank body part below the handle of the plastic bottle blank, the radiation energy and the temperature of the plastic bottle blank by the heating lamp tubes in the respective areas can be controlled by adjusting the power of the heating lamp tubes in the low-temperature heating area and the power of the heating lamp tubes in the common heating area, meanwhile, the mutual direct heat radiation light of the heating lamp tubes in the low-temperature heating area and the common heating area can be blocked by the first handle protection plate and the second handle protection plate, and the mutual oblique heat radiation light of the heating lamp tubes in the low-temperature heating area and the common heating area can be blocked by the partial low-temperature heating, so as to realize the low-temperature heating of the handle part of the plastic bottle blank and the ordinary heating of the blank body of the part below the handle (the ordinary heating is the normal heating with the temperature higher than the low-temperature heating area). The low-temperature heating of the handle part can be realized, so that the problem that the handle of the PET plastic bottle blank with the handle becomes soft and deformed due to heating is avoided, and the bottle blowing quality is ensured.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a sectional view taken along the direction a-a in fig. 1.

Fig. 3 is a schematic view of the first handle guard and the second handle guard.

Detailed Description

A bottle blank heating mechanism with a handle is shown in figures 1 and 2 and comprises a heating box 1 provided with a heating lamp tube and a heat insulation plate 2 arranged at the bottom of the heating box 1, wherein a reflection plate mounting frame 6 opposite to the heating box 1 is arranged on the heat insulation plate 2, an external cooling water channel 4 is arranged at the top of the heating box 1, an internal cooling water channel 5 is arranged at the top of the reflection plate mounting frame 6, a space for a bottle mouth of a plastic bottle blank to penetrate out is arranged between the external cooling water channel 4 and the internal cooling water channel 5, and the heating box 1, the heat insulation plate 2, the reflection plate mounting frame 6, the external cooling water channel 4 and the internal cooling water channel 5 enclose a heating area for heating a bottle body of the plastic bottle blank; be provided with first in command guard plate 8 on reflecting plate mounting bracket 6, be provided with second in command guard plate 3 on warming box 1, first in command guard plate 8 is relative with second in command guard plate 3 and has the interval that the body that supplies the plastic bottle embryo passed between the two, first in command guard plate 8 and second in command guard plate 3 will heat the district region and separate into low temperature and heat the region and ordinary heating region with heating, the low temperature heats the region and is relative with the handle position of plastic bottle embryo, the embryo body part below ordinary heating region and the plastic bottle embryo handle is relative. When the plastic bottle preform is heated, the outer cooling water channel 4 and the inner cooling water channel 5 both cool the bottle mouth of the plastic bottle preform.

As shown in fig. 3, stress relief grooves 13 are formed in both the horizontal surface of the first handle shield plate 8 and the horizontal surface of the second handle shield plate 3 to prevent the first handle shield plate 8 and the second handle shield plate 3 from being deformed after high temperature.

Still be provided with reflecting plate 7 in ordinary heating district intra-area and on reflecting plate mounting bracket 6, when the heating fluorescent tube in ordinary heating district was heated the embryo body of plastic bottle embryo, the heat radiation light energy of its production also can pierce through the embryo body and be penetrated on reflecting plate 7, form the reflection and carry out the secondary to the embryo body through reflecting plate 7 effect and heat, owing to have first in command guard plate 8, when carrying out the secondary and heating, first in command guard plate 8 also can block the oblique jet of each other after the heat radiation light reflection that produces this moment, avoid the handle to receive the influence.

The blank body cooling device is characterized by further comprising a reflection box 11, the reflection plate mounting frame 6 is connected to the reflection box 11, a blank body cooling fan 10 is arranged in the reflection box 11, and a plurality of cooling air channel holes 14 are formed in the vertical surface of the first handle protection plate 8 and the vertical surface of the reflection plate mounting frame 6 at intervals. Through setting up embryo body cooling fan 10 and cooling air passageway hole 14, can cool off embryo body surface and handle, prevent embryo body surface crystallization, and make the plastic bottle embryo inner wall temperature after the heating be higher than its outer wall temperature. A plurality of cooling air channel holes 14 on the vertical surface of the first handle protection plate 8 and part of cooling air channel holes 14 on the vertical surface of the reflection plate mounting frame 6 can be arranged oppositely or not, and the relative arrangement is adopted in the embodiment, so that the loss of cooling air energy can be avoided, and a good cooling effect is ensured.

An air draft channel 15 communicated with the heating area is arranged in the heating box 1, and air in the heating area can be discharged out of the heating mechanism.

A blank port cooling fan 9 is arranged below the reflection box 11, a blank port cooling air box 12 is connected to the blank port cooling fan 9, the blank port cooling air box 12 vertically penetrates through the reflection box 11, an air outlet of the blank port cooling air box is opposite to a bottle mouth of the plastic bottle blank, and the blank port cooling air box and the inner cooling water channel 5 and the outer cooling water channel 4 cool the bottle mouth together.

Claims

1. A bottle blank heating mechanism with a handle comprises a heating box (1) provided with a heating lamp tube and a heat insulation plate (2) arranged at the bottom of the heating box (1), wherein a reflection plate mounting frame (6) opposite to the heating box (1) is arranged on the heat insulation plate (2), an external cooling water channel (4) is arranged at the top of the heating box (1), an internal cooling water channel (5) is arranged at the top of the reflection plate mounting frame (6), an interval for a bottle mouth of a plastic bottle blank to penetrate out is arranged between the external cooling water channel (4) and the internal cooling water channel (5), and the heating box (1), the heat insulation plate (2), the reflection plate mounting frame (6), the external cooling water channel (4) and the internal cooling water channel (5) enclose a heating area for heating a bottle body of the plastic bottle blank; the method is characterized in that: be provided with first in command guard plate (8) on reflecting plate mounting bracket (6), be provided with second in command guard plate (3) on warming box (1), first in command guard plate (8) and second in command guard plate (3) are relative and have the interval that the body that supplies the plastic bottle embryo passed between the two, first in command guard plate (8) and second in command guard plate (3) will heat the district region and separate into low temperature and heat the region and ordinary and heat the region, the low temperature heats the handle position of region and plastic bottle embryo relatively, the ordinary embryo body part below heating region and plastic bottle embryo handle is relative.

2. The bottle blank heating mechanism with the handle as claimed in claim 1, wherein: stress release grooves (13) are formed in the horizontal plane of the first handle protection plate (8) and the horizontal plane of the second handle protection plate (3).

3. The bottle blank heating mechanism with the handle as claimed in claim 1 or 2, wherein: a reflecting plate (7) is also arranged in the common heating area and on the reflecting plate mounting rack (6).

4. The bottle blank heating mechanism with the handle as claimed in claim 3, wherein: the blank body cooling device is characterized by further comprising a reflection box (11), the reflection plate mounting frame (6) is connected to the reflection box (11), a blank body cooling fan (10) is arranged in the reflection box (11), and a plurality of cooling air channel holes (14) are formed in the vertical surface of the first handle protection plate (8) and the vertical surface of the reflection plate mounting frame (6) at intervals.

5. The bottle blank heating mechanism with the handle as claimed in claim 4, wherein: an air draft channel (15) communicated with the heating area is arranged in the heating box (1).

6. The bottle blank heating mechanism with the handle as claimed in claim 4 or 5, wherein: a blank port cooling fan (9) is arranged below the reflection box (11), a blank port cooling air box (12) is connected to the blank port cooling fan (9), the blank port cooling air box (12) vertically penetrates through the reflection box (11), and an air outlet of the blank port cooling air box is opposite to a bottle opening of the plastic bottle blank.