CN217144732U

CN217144732U - Bottle embryo injection moulding mould

Info

Publication number: CN217144732U
Application number: CN202220775477.7U
Authority: CN
Inventors: 王绍乾; 李四海; 黄业焜
Original assignee: Zhongshan Jingjia Packaging Machinery Co ltd
Current assignee: Zhongshan Jingjia Packaging Machinery Co ltd
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2022-08-09
Anticipated expiration: 2032-04-01

Abstract

The utility model belongs to the technical field of blow molding dies, in particular to a bottle blank injection molding die, which comprises a core die body and a half die; the outer diameter of the blank bottom of the bottle blank is larger than that of the blank body; the half mould comprises two half moulds, and a blank body forming cavity for forming the outer wall of the blank body of the bottle blank is formed between the two half moulds; the core mold body is used for forming the inner cavity of the bottle blank. In the scheme, the bottle blank adopts a bottom-expanding structure, so that the outer diameter of the blank bottom is larger than the blank body of the bottle blank, and the blank bottom has more plastics, so that a thicker bottle bottom can be formed during blow molding, and the requirement of the market on a plastic bottle with a thickness is met; in addition, adopt two ha fu mould structures in this scheme to guarantee that the embryo end of bottle embryo can not be because of the too big card of external diameter can't take out in the mould.

Description

Bottle embryo injection moulding mould

Technical Field

The utility model belongs to the technical field of the blow molding mould, concretely relates to bottle embryo injection moulding mould.

Background

The plastic bottle is used as a container for liquid or fixed containing in daily life, has the advantages of being not easy to break, low in cost, high in transparency, food-grade raw materials and the like, and has a wide application market; for example, plastic bottles are used for packaging liquid or solid products such as beverages, foods, pickles, honey, dried fruits, edible oils, agricultural and veterinary drugs, and the like. The plastic bottle is mainly made of polyethylene or polypropylene and other materials with a plurality of organic solvents. Plastic bottles widely use Polyester (PET), Polyethylene (PE), polypropylene (PP), and the like as raw materials, and after adding a corresponding organic solvent and heating at a high temperature, the plastic bottles are subjected to injection molding, extrusion blowing, or blow molding through a plastic mold.

At present, as mainstream processing technologies of plastic hollow containers, the technologies of one-step injection stretch blow and multilayer coextrusion are becoming the focus of attention. The one-step injection stretch blow molding process includes the steps of plasticizing plastic material in an injection system, high speed and high pressure injecting the plastic material into an injection mold, cooling to obtain bottle blank with certain residual temperature, fast demolding, converting the bottle blank into blow mold cavity, filling compressed air into the bottle blank cavity and stretching longitudinally to fit the bottle blank and the bottle mold cavity completely, and cooling to obtain the required hollow product.

The bottle embryo mould before blow molding is often used in the processing procedure of the bottle, and the existing bottle embryo shape is often a structure with a large mouth part and a small embryo bottom, the quantity of plastics at the embryo bottom of the bottle embryo with the structure is small, the embryo bottom of the produced plastic bottle product is thin, the market can not be opened in some scenes with requirements on the embryo bottom thickness, and in order to utilize the plastic bottle with thicker embryo bottom produced by the injection stretch blow molding technology, a bottle embryo capable of meeting the requirements and a mould structure for the structure molding of the bottle embryo are necessarily designed.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that a plastic bottle with a thicker blank bottom cannot be produced by a bottle blank and a corresponding production mold in the prior art, the scheme provides an injection molding mold for the bottle blank.

The utility model discloses the technical scheme who adopts does:

a bottle blank injection molding mold comprises a core mold body and a half mold; the outer diameter of the blank bottom of the bottle blank is larger than that of the blank body; the half mould comprises two half moulds, and a blank body forming cavity for forming the outer wall of the blank body of the bottle blank is formed between the two half moulds; the core mold body is used for forming the inner cavity of the bottle blank. In the scheme, the bottle blank adopts a bottom-expanding structure, so that the outer diameter of the blank bottom is larger than the blank body of the bottle blank, and the blank bottom is provided with more plastics, so that a thicker blank bottom can be formed during blow molding, and the requirement of the market on a thick plastic bottle is met; in addition, in order to be convenient for taking out the expanded-base-shaped structure of the bottle blank after forming, the two half die structures are adopted in the scheme, so that the blank bottom of the bottle blank is prevented from being clamped in a die and being incapable of being taken out due to overlarge outer diameter.

As an alternative structure or supplementary design of the bottle blank injection molding mold: the bottle opening forming die is arranged above the half die and used for forming a bottle opening of a bottle blank. The bottle mouth mold assembly can be matched with the core mold body to form a bottle mouth of a molded bottle blank, and threads can be molded on the outer side of the bottle mouth, so that the bottle mouth can be conveniently connected with bottle caps of corresponding models.

As an alternative structure or supplementary design of the bottle blank injection molding mold: the bottle mouth mold assembly comprises two bottle mouth mold halves and two mold half seats; the bottle mouth mold sections are connected to the corresponding mold section seats; the two bottle mouth mold sections are matched to form a bottle mouth forming cavity for forming the outer wall of the bottle mouth, and the bottle mouth forming cavity is connected with the blank body forming cavity. Two bottle mouth mold sections are adopted for matching, so that the demolding after the bottle mouth is molded is facilitated.

As an alternative structure or supplementary design of the bottle blank injection molding mold: the core mould body is tubular, a core base is arranged at one end of the core mould body, and a channel communicated with the core mould body is arranged in the core base. The tubular core mould body is adopted to assist in demoulding the core mould body and the inner wall of the bottle blank in an inflation mode.

As an alternative structure or supplementary design of the bottle blank injection molding mold: an upper die holder and a lower die holder are respectively arranged above and below the half die; each half die is matched with the upper die holder and the lower die holder in an inclined manner, so that when the upper die holder is close to the lower die holder, the two half dies can be close to each other.

As an alternative structure or supplementary design of the bottle blank injection molding mold: a second spring for pushing the two half dies away in opposite directions is arranged between the two half dies; a first spring for pushing the upper die holder and the lower die holder away from each other in an opposite direction is arranged between the upper die holder and the lower die holder.

As an alternative structure or supplementary design of the bottle blank injection molding mold: the middle part of the upper die base is provided with a central hole which is positioned right above the blank forming cavity so that the core die body can be vertically inserted.

As an alternative structure or supplementary design of the bottle blank injection molding mold: the lower part of embryo body shaping chamber is provided with the interface piece of moulding plastics, the interface piece butt joint that moulds plastics has hot runner assembly, and this hot runner assembly can be with glutinous flow state plastics drainage to embryo body shaping chamber.

As an alternative structure or supplementary design of the bottle blank injection molding mold: the hot runner assembly is provided with a runner inlet and a runner outlet, the runner inlet is horizontally and transversely arranged, and the runner outlet is vertically arranged. The hot runner assembly can change the conveying direction of the hot-melt plastic in the transverse direction to be vertical, so that the injection molding of a mold and the matching of the injection mold assembly are facilitated.

As an alternative structure or supplementary design of the bottle blank injection molding mold: the blank bottom is in a bottom expanding shape, and the outer diameter of the blank bottom is gradually increased along the direction far away from the bottle mouth. The structural design of the blank bottom can accumulate more plastics in the forming process of the bottle blank, thereby being convenient for forming the plastic bottle with the thicker blank bottom.

The utility model has the advantages that:

1. the bottle blank with the bottom expanding structure is designed in the scheme, the outer diameter of the blank bottom of the bottle blank is larger than the blank body of the bottle blank, so that more plastic is accumulated on the blank bottom, a thicker bottle bottom can be formed during blow molding, and the requirement of the market on a thick plastic bottle is met;

2. in the scheme, the bottle blank is molded by adopting a mode of matching two half dies, so that the expanded-base-shaped structure of the bottle blank can be taken out after molding conveniently, and the phenomenon that the outer diameter of the blank bottom of the bottle blank is too large and the blank is clamped in a die and cannot be taken out is prevented.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a schematic structural view of a bottle preform injection molding mold according to the present embodiment;

FIG. 2 is an exploded view of the bottle preform injection mold according to the present embodiment;

FIG. 3 is an internal block diagram of the injection core mold assembly of the present solution;

FIG. 4 is a schematic diagram of a bottle blank of the present embodiment in comparison with a conventional bottle blank;

FIG. 5 is a comparison of the bottle bottoms of plastic bottles produced from the bottle blanks of the present embodiment and conventional bottle blanks.

In the figure: 1-a hot runner assembly; 11-channel inlet; 12-a flow channel outlet; 2-an injection cavity mold assembly; 21-a lower die holder; 22-half mould; 23-an upper die holder; 24-a first spring; 25-a molding cavity; 26-injection molding an interface piece; 27-a central hole; 3-a bottle mouth mold assembly; 31-a mould flap seat; 32-bottle mouth mold halves; 4-injection core mould assembly; 41-core mold body; 42-a core print seat; 5-bottle embryo; 51-embryonic bottom.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings, and the described embodiments are only a part of the embodiments, but not all embodiments, and all other embodiments obtained by those skilled in the art without creative efforts will belong to the protection scope of the present solution based on the embodiments in the present solution.

Example 1

As shown in fig. 4 to 5, the present embodiment designs a bottle blank 5, as shown in fig. 4 (a), the upper portion of the bottle blank 5 has a bottle mouth with external threads, the lower portion of the bottle blank 5 has a bottom 51, the bottom 51 makes the bottle blank 5 in an expanded-bottom structure, the bottom 51 forms the bottom of the bottle blank 5, and the outer diameter of the bottom 51 gradually increases along a direction away from the bottle mouth.

The existing bottle blanks are often of a structure with a large blank body and a small blank bottom, as shown in fig. 4 (b), the blank bottom of the bottle blank of the structure has a small amount of plastic, so that the blank bottom of the produced plastic bottle product is thin, as shown in fig. 5 (b).

The structural design of the bottom 51 of the bottle blank 5 in this embodiment can accumulate more plastics in the forming process of the bottle blank 5, and the bottle blank 5 makes the outer diameter of the bottom greater than the body of the bottle blank 5, so that the bottom has more plastics, and thus when blow molding, a thicker bottom can be formed, as shown in (a) of fig. 5, thereby meeting the market demand for a thick plastic bottle.

Example 2

As shown in fig. 1 to fig. 5, the present embodiment designs a bottle preform injection molding mold, which includes a hot runner assembly 1, a cavity injection mold assembly 2, a bottle neck mold assembly 3, a core injection mold assembly 4, and the like. The hot runner assembly 1, the cavity injection mold assembly 2, the bottle neck mold assembly 3 and the core injection mold assembly 4 are sequentially arranged vertically upwards.

The hot runner assembly 1 is provided with a runner inlet 11 and a runner outlet 12, wherein the runner inlet 11 is horizontally and transversely arranged, and the runner outlet 12 is vertically arranged. The hot runner assembly 1 can change the conveying direction of the hot-melt plastic in the transverse direction to be vertical, so that the injection molding of a mold and the matching with the cavity injection mold assembly 2 are facilitated. This hot runner assembly 1 can be with in the viscous state plastics drainage to notes cavity mould subassembly 2.

The cavity injection mold assembly 2 comprises a lower mold base 21, a half mold 22, an upper mold base 23, a first spring 24, an injection molding interface 26 and the like; the half mould 22 comprises two half moulds, and a blank body forming cavity 25 for forming the outer wall of the blank body of the bottle blank 5 is formed between the two half moulds; the interface 26 sets up of moulding plastics the lower part of embryo body shaping chamber 25, the interface 26 butt joint of moulding plastics has hot runner assembly 1, and this hot runner assembly 1 can be with the drainage of viscous state plastics to embryo body shaping chamber 25, and the up end of this interface 26 of moulding plastics can be used for the shaping of the lower terminal surface of bottle embryo 5.

An upper die holder 23 and a lower die holder 21 are respectively arranged above and below the half die; each half die has its own bevel fitted to the upper die holder 23 and the lower die holder 21 so that when the upper die holder 23 is brought close to the lower die holder 21, the two half dies are brought close to each other. A second spring for pushing the two half dies away in opposite directions is arranged between the two half dies; a first spring 24 is provided between the upper die holder 23 and the lower die holder 21 for pushing the upper die holder and the lower die holder in opposite directions.

A central hole 27 is provided in the middle of the upper die holder 23, and the central hole 27 is located right above the blank-forming cavity 25 to allow the core die body 41 to be inserted vertically.

The bottle neck mold component 3 is arranged above the half mold 22 and is used for forming a bottle opening of the bottle blank 5, and the bottle neck mold component 3 comprises two bottle opening mold halves 32 and two mold half seats 31; the bottle mouth mold halves 32 are connected to the corresponding mold half seats 31, and different bottle mouth mold halves 32 can be replaced according to flat models to be molded; the two finish mold halves 32 cooperate to form a finish forming cavity 25 for forming the outer wall of the finish, and the finish forming cavity 25 is connected with the preform forming cavity 25. The bottle neck mold component 3 adopts two bottle mouth mold halves 32 for matching, thereby facilitating the demolding after the bottle mouth is formed. The bottle neck mold component 3 can be matched with the core mold body 41 to form a bottle mouth of the bottle blank 5, and threads can be formed on the outer side of the bottle mouth, so that the bottle mouth can be conveniently connected with bottle caps of corresponding models. When blow molding is required, the bottle neck mold assembly 3 reaches the blow molding equipment together with the bottle blank 5 for blow molding, and the bottle neck mold assembly 3 is removed after the blow molding is finished.

The core injection mold assembly 4 includes a core mold body 41 and a core base 42, the core mold body 41 is tubular and used for forming the inner cavity of the bottle blank 5, the core base 42 is connected to one end of the core mold body 41, and a passage communicated with the core mold body 41 is arranged in the core base 42. The tubular core mold body 41 is capable of introducing water flow to accelerate the cooling molding of the bottle blank 5.

The above examples are merely for clearly illustrating the examples and are not intended to limit the embodiments; and are neither required nor exhaustive of all embodiments. And obvious variations or modifications of this technology may be resorted to while remaining within the scope of the technology.

Claims

1. The utility model provides a bottle embryo injection moulding mould which characterized in that: comprises a core die body (41) and a half die (22); the outer diameter of the blank bottom of the bottle blank (5) is larger than that of the blank body; the half mould (22) comprises two half moulds, and a blank body forming cavity (25) for forming the outer wall of the blank body of the bottle blank (5) is formed between the two half moulds; the core die body (41) is used for forming the inner cavity of the bottle blank (5).

2. The bottle blank injection molding mold according to claim 1, characterized in that: the forming mold further comprises a bottle mouth mold component (3), wherein the bottle mouth mold component (3) is arranged above the half mold (22) and is used for forming a bottle mouth of the bottle blank (5).

3. The bottle blank injection molding mold according to claim 2, characterized in that: the bottle mouth mold assembly (3) comprises two bottle mouth mold halves (32) and two mold half seats (31); the bottle mouth mould halves (32) are connected to the corresponding mould half seats (31); the two bottle mouth mold flaps (32) are matched to form a bottle mouth forming cavity (25) for forming the outer wall of the bottle mouth, and the bottle mouth forming cavity (25) is connected with the blank forming cavity (25).

4. The bottle blank injection molding mold according to claim 1, characterized in that: the core mold body (41) is tubular, a core seat (42) is arranged at one end of the core mold body (41), and a channel communicated with the core mold body (41) is arranged in the core seat (42).

5. The bottle blank injection molding mold according to claim 1, characterized in that: an upper die holder (23) and a lower die holder (21) are respectively arranged above and below the half die; each half die is in inclined surface fit with the upper die holder (23) and the lower die holder (21) so that when the upper die holder (23) is close to the lower die holder (21), the two half dies can be close to each other.

6. The bottle blank injection molding mold according to claim 5, characterized in that: a second spring for pushing the two half dies away in opposite directions is arranged between the two half dies; a first spring (24) for pushing the upper die holder (23) and the lower die holder (21) away from each other in an opposite manner is arranged between the upper die holder and the lower die holder.

7. The bottle blank injection molding mold according to claim 6, characterized in that: a central hole (27) is formed in the middle of the upper die holder (23), and the central hole (27) is located right above the blank forming cavity (25) so that a core die body (41) can be vertically inserted.

8. The bottle blank injection molding mold according to claim 1, characterized in that: the lower part of embryo body one-tenth die cavity (25) is provided with the interface piece (26) of moulding plastics, interface piece (26) butt joint of moulding plastics has hot runner assembly (1), and this hot runner assembly (1) can be with glutinous flow state plastics drainage to embryo body one-tenth die cavity (25).

9. The bottle blank injection molding mold according to claim 8, characterized in that: the hot runner assembly (1) is provided with a runner inlet (11) and a runner outlet (12), the runner inlet (11) is horizontally and transversely arranged, and the runner outlet (12) is vertically arranged.

10. The bottle blank injection molding mold according to any one of claims 1 to 9, characterized in that: the blank bottom (51) is in an expanded bottom shape, and the outer diameter of the blank bottom (51) is gradually increased along the direction far away from the bottle mouth.