CN220593711U

CN220593711U - PET plastic bottle embryo

Info

Publication number: CN220593711U
Application number: CN202322253075.8U
Authority: CN
Inventors: 雷灿乐
Original assignee: Heshan Fuyuan Plastic Hardware Products Co ltd
Current assignee: Heshan Fuyuan Plastic Hardware Products Co ltd
Priority date: 2023-08-21
Filing date: 2023-08-21
Publication date: 2024-03-15
Anticipated expiration: 2033-08-21

Abstract

The utility model relates to a PET plastic bottle blank, which belongs to the field of plastic bottle blanks and comprises a blank body, thread teeth, a blocking ring and a bending part; the embryo body comprises an upper embryo part and a lower embryo part; the thread teeth are arranged on the outer peripheral side of the upper blank part and are positioned at the upper end of the upper blank part; the blocking ring is arranged on the upper blank part and is positioned below the thread teeth; the thread teeth and the blocking ring are integrally formed with the upper blank part; two ends of the bending part are respectively connected with the upper embryo part and the lower embryo part; the bending part, the upper embryo part and the lower embryo part are integrally formed. The utility model has simple structure, is convenient for production, and can ensure that the integral strength meets the use requirement.

Description

PET plastic bottle embryo

Technical Field

The utility model relates to the field of plastic bottle blanks, in particular to a PET plastic bottle blank.

Background

At present, in the blowing process, hot air is blown into the bottle embryo from the bottle mouth of the bottle embryo, in the blowing process, the part of the bottle embryo, which is close to the position of the bottle mouth, is firstly heated rapidly to be in a softened and molten state, and the bottle neck and the connecting position of the bottle body are gradually stretched after being blown up, so that the bottle mouth and the plastic at the bottle neck are easy to sink towards the bottle body, and then even if the bottle is continuously blown into the bottle embryo, the outer side surface of the bottle is abutted against the inner side surface of the mold cavity, so that the bottle is spread under the action of air pressure, however, the connecting position of the bottle neck and the bottle body is still possibly uneven due to the sinking, the thickness of a final finished product at the connecting position of the bottle neck and the bottle body is thinner, and defective products of the bottle are produced.

Chinese patent publication No. CN115194978A discloses that when the PET bottle embryo is stretched under the action of air pressure at the junction of bottle neck and body portion, the concave of junction of bottle neck and body portion can be effectively filled to the molten blocking piece for the thickness distribution of the junction of bottle neck and body portion is more even. Through setting up convex blocking piece, be favorable to the bending of bottle neck and the junction of body portion in the tensile in-process, accord with the crooked range of bottle for the blow molding effect of bottle is better.

However, the bottle preform of the above technical scheme is difficult to produce, resulting in increased production cost.

Disclosure of Invention

Aiming at the problems in the background technology, the utility model provides the PET plastic bottle blank which has a simple structure, is convenient to produce and can ensure that the integral strength reaches the use requirement.

The technical scheme of the utility model is as follows: a PET plastic bottle embryo comprises an embryo body, a thread, a blocking ring and a bending part;

the embryo body comprises an upper embryo part and a lower embryo part; the thread teeth are arranged on the outer peripheral side of the upper blank part and are positioned at the upper end of the upper blank part; the blocking ring is arranged on the upper blank part and is positioned below the thread teeth; the thread teeth and the blocking ring are integrally formed with the upper blank part; two ends of the bending part are respectively connected with the upper embryo part and the lower embryo part; the bending part, the upper embryo part and the lower embryo part are integrally formed.

Preferably, the upper embryo part is provided with a second blocking ring; the second blocking ring is positioned between the thread teeth and the blocking ring and is integrally formed with the upper blank part.

Preferably, the upper end of the upper blank part is provided with a bottleneck ring.

Preferably, the finish ring is semi-circular in configuration.

Preferably, the connection parts of the upper embryo part and the lower embryo part and the bending part are provided with transition arcs.

Preferably, a rounded corner is arranged at the joint of the blocking ring and the upper embryo part.

Preferably, the lower end of the lower embryo part is provided with a bottle bottom; the thickness of the bottom of the bottle is larger than the wall thickness of the embryo body.

Compared with the prior art, the utility model has the following beneficial technical effects:

according to the utility model, the bottleneck ring is used for sealing, so that the stability in blow molding can be improved, the thickness of the connecting part and the thickness of the lower blank part are the same through the bending part, and the cracking in use or the explosion in bearing pressure can be avoided, so that the integral structural strength of the bottle can be improved; the bottle bottom can provide the volume of deformation in the bottom of embryo portion down for the thickness of the bottom of embryo portion is greater than the thickness of body down, thereby can make the bottom more wear-resisting, places when using, and the bottle bottom damages because of wearing and tearing, leads to taking place to leak scheduling problem.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

fig. 2 is a schematic view of a partial enlarged structure at a in fig. 1.

Reference numerals: 1. a blank; 2. a thread tooth; 3. a finish ring; 4. a blocking ring; 401. chamfering; 5. a bending part; 501. a transitional arc; 6. a bottle bottom; 7. and a second blocking ring.

Detailed Description

Example 1

As shown in fig. 1 and 2, the PET plastic bottle blank provided by the utility model comprises a blank body 1, a thread 2, a blocking ring 4 and a bending part 5;

the embryo body 1 comprises an upper embryo part and a lower embryo part; the thread 2 is arranged on the outer periphery side of the upper blank part and is positioned at the upper end of the upper blank part; the blocking ring 4 is arranged on the upper blank part, and the blocking ring 4 is positioned below the thread teeth 2; the thread teeth 2 and the blocking ring 4 are integrally formed with the upper blank part; two ends of the bending part 5 are respectively connected with the upper embryo part and the lower embryo part; the bending part 5 is integrally formed with the upper blank part and the lower blank part. The lower end of the lower embryo part is provided with a bottle bottom 6; the thickness of the bottle bottom 6 is larger than the wall thickness of the blank 1; the blank 1, the thread 2, the bottleneck ring 3, the blocking ring 4, the bending part 5, the bottle bottom 6 and the second blocking ring 7 are all made of PET plastic, so that the food safety regulation can be met.

The upper embryo part is provided with a second blocking ring 7; the second blocking ring 7 is positioned between the thread 2 and the blocking ring 4 and is integrally formed with the upper blank.

The connection parts of the upper embryo part and the lower embryo part and the bending part 5 are provided with transition arcs 501. A rounded corner 401 is arranged at the joint of the blocking ring 4 and the upper embryo part; stress concentration at the joint of the blank 1 and the blocking ring 4 can be prevented by the rounding 401, so that the blank 1 is broken at the joint of the blank 1 and the blocking ring 4; through transition arc 501 can be better carry out the transition to kink 5, can make things convenient for follow-up blow molding processing, and can make the bottle of processing out more mellow and round.

In this embodiment, the blow molding machine is clamped on the blocking ring 4, and the bottleneck ring 3 is abutted against the blow molding machine, and the bottleneck ring 3 is used for sealing, so that stability in blow molding can be improved, the lower blank part is placed into a blow molding die for heating and blow molding, deformation is performed at the bending part 5 during blow molding, so that a connecting part between the bottle body and the upper blank part is provided during bottle blow molding, and the thickness of the connecting part is the same as that of the lower blank part, so that breakage at the connecting part during use or explosion occurs at the moment when bearing pressure can be avoided, and the integral structural strength of the bottle can be improved; the bottle bottom 6 can provide the volume of deformation in the bottom of embryo portion down for the thickness of the bottom of embryo portion is greater than the thickness of body down, thereby can make the bottom more wear-resisting, places when using, and the bottle bottom damages because of wearing and tearing, leads to taking place to leak scheduling problem.

Example two

As shown in fig. 1 and 2, in the PET plastic bottle preform according to the present utility model, compared with the first embodiment, the upper end of the upper preform portion is provided with the finish ring 3. The bottleneck ring 3 is in a semicircular structure.

In the embodiment, the upper end of the upper blank part is in a semicircular structure through the bottleneck ring 3, so that blow molding can be conveniently performed, and the bottleneck ring 3 can be pressed on a gasket on the bottle cover, so that the sealing effect can be improved, the bottle cover can be conveniently sealed, and the problem of water leakage during use is prevented; the upper end of the upper blank part can be round and smooth through the bottleneck ring 3, so that the user can be prevented from being cut during use.

The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.

Claims

1. The PET plastic bottle embryo is characterized by comprising an embryo body (1), a thread (2), a blocking ring (4) and a bending part (5);

the embryo body (1) comprises an upper embryo part and a lower embryo part; the thread tooth (2) is arranged on the outer periphery side of the upper blank part and is positioned at the upper end of the upper blank part; the blocking ring (4) is arranged on the upper blank part, and the blocking ring (4) is positioned below the thread teeth (2); the thread teeth (2) and the blocking ring (4) are integrally formed with the upper blank part; two ends of the bending part (5) are respectively connected with the upper embryo part and the lower embryo part; the bending part (5) is integrally formed with the upper embryo part and the lower embryo part.

2. A PET plastic bottle preform according to claim 1, characterized in that the upper preform part is provided with a second blocking ring (7); the second blocking ring (7) is positioned between the thread (2) and the blocking ring (4) and is integrally formed with the upper blank part.

3. A PET plastic bottle preform according to claim 1, characterized in that the upper end of the upper preform part is provided with a finish ring (3).

4. A PET plastic bottle preform according to claim 3, characterized in that the finish ring (3) has a semicircular structure.

5. A PET plastic bottle preform according to claim 1, characterized in that the junction of the upper and lower preform portions and the bent portion (5) is provided with a transition arc (501).

6. A PET plastic bottle preform according to claim 1, characterized in that the junction of the blocking ring (4) and the upper preform part is provided with rounded corners (401).

7. A PET plastic bottle preform according to claim 1, characterized in that the lower end of the lower preform portion is provided with a bottle bottom (6); the thickness of the bottle bottom (6) is larger than the wall thickness of the blank body (1).