CN218966114U

CN218966114U - Split type blow molding mouth die

Info

Publication number: CN218966114U
Application number: CN202320028988.7U
Authority: CN
Inventors: 张志华
Original assignee: Hengbo Holdings Co ltd
Current assignee: Hengbo Holdings Co ltd
Priority date: 2023-01-06
Filing date: 2023-01-06
Publication date: 2023-05-05
Anticipated expiration: 2033-01-06

Abstract

The utility model relates to a split blow molding neck ring flange, which comprises an outer mold assembly and a mold core assembly, wherein the outer mold assembly is connected with a neck ring flange of a blow molding machine, and the mold core assembly is connected with a core mold connecting rod of the blow molding machine; the mould core assembly is installed in the external mould assembly, a blow molding cavity for materials to pass through is formed between the mould core assembly and the external mould assembly, a blow molding opening matched with the bottom of the mould core assembly is formed in the bottom of the external mould assembly, and the blow molding opening is opened when the mould core connecting rod moves upwards the mould core assembly. This blowing bush structure is ingenious, can open and close the blowing chamber according to actual need, avoids influencing the quality of blowing piece because of the material is too much, can reduce the waste to the material simultaneously, reduces the manufacturing cost of enterprise, is favorable to above-mentioned blowing bush popularization and application on the blowing machine.

Description

Split type blow molding mouth die

Technical Field

The utility model relates to the technical field of blow molding, in particular to a split blow molding die.

Background

Blow molding, also known as hollow blow molding, is a rapidly developing plastic processing method. The blow molding process began to be used to produce low density polyethylene vials during the second world war. In the later 50 s, with the advent of high density polyethylene and the development of blow molding machines, blow molding technology has been widely used. Hollow containers can be thousands of liters in volume, and some have been computer controlled. Suitable plastics for blow molding are polyethylene, polyvinyl chloride, polypropylene, polyester, etc., and the resulting hollow containers are widely used as industrial packaging containers. Blow molding can be classified into extrusion blow molding and injection blow molding according to parison making methods, and multi-layer blow molding and stretch blow molding have been newly developed.

Extrusion blow molding is a method of making hollow thermoplastic articles. Blow molded articles are widely known as bottles, drums, cans, boxes, and all containers for packaging foods, beverages, cosmetics, medicines, and daily necessities. Large blow molded containers are commonly used on packaging for chemical products, lubricants, and bulk materials. Other blow molded articles include balls, bellows, and toys. For the automotive industry, fuel tanks, vent lines, car bumpers, seat backs, center brackets, and armrest and headrest covers are all blow molded. For the mechanical and furniture industry, blow molded parts have housings, door frames, shelves, jars or boxes with an open face.

The die head of a blow molding machine, also known as a die, is an important component of a blow molding machine. The blow molding machine is used as main equipment for producing plastic products and mainly comprises an extruder, a die, a clamp mechanism and a blowing system, wherein the die is one of very important parts in blow molding.

The ejection port of the traditional die is generally of a circular structure, and blow molding is relatively single. When the blow molding piece with complex blow molding shape is needed, the integral replacement of the mouth mold is needed, the cost of manufacturing the mouth mold is increased, and meanwhile, the production cost of the blow molding piece is increased, so that the popularization and the use of the blow molding piece in the market are affected.

In order to solve the technical problem, the Chinese patent application No. 2022212190435 discloses a split blow molding die for a special-shaped bottle with uniform blow molding wall thickness, which comprises an upper die and a die piece, wherein the upper die and the die piece are connected through screws, and the die is divided into the split die of the upper die and the die piece, so that when the die is replaced, only the die piece is required to be replaced, the manufacturing cost of the die is reduced, and meanwhile, the production cost of blow molding pieces is reduced. However, because the blow cavity arranged in the blow molding die is communicated from top to bottom, the molten material can continuously flow out in the actual use process, the quality of the blow molding piece is influenced, and the waste of the material is caused, so that the popularization and the application of the blow molding die on a blow molding machine are not facilitated.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model aims to provide the split type blow molding die which is ingenious in structure, can open and close a blow molding cavity according to actual needs, avoids influencing the quality of blow molding parts due to excessive materials, can reduce the waste of the materials, reduces the production cost of enterprises, and is beneficial to popularization and application of the blow molding die on a blow molding machine.

In order to achieve the aim, the split type blow molding neck mold comprises an outer mold assembly and a mold core assembly, wherein the outer mold assembly is connected with a neck mold flange plate of a blow molding machine, and the mold core assembly is connected with a core mold connecting rod of the blow molding machine; the mould core assembly is installed in the external mould assembly, a blow molding cavity for materials to pass through is formed between the mould core assembly and the external mould assembly, a blow molding opening matched with the bottom of the mould core assembly is formed in the bottom of the external mould assembly, and the blow molding opening is opened when the mould core connecting rod moves upwards the mould core assembly.

As a preferable scheme of the utility model, the cross section of the hollow part of the outer die assembly and the cross section of the die core assembly are arranged in a conical shape.

As a preferred aspect of the present utility model, the outer mold assembly includes an outer die and a lower die, and the outer die and the lower die are detachably connected.

As a preferable mode of the utility model, a lower die mounting groove is arranged at the bottom of the outer die, and the lower die is mounted at the lower die mounting groove.

As a preferred aspect of the present utility model, the mold core assembly includes an upper mold core and a lower mold core, and the lower mold core is detachably connected with the upper mold core.

As a preferable mode of the utility model, the outer die is provided with an upper die core mounting hole, and the upper die core is mounted in the upper die core mounting hole.

As a preferable mode of the utility model, the upper mold core is provided with a first connecting hole for connecting the core mold connecting rod.

As a preferable mode of the utility model, the lower mold core is provided with a second connecting hole communicated with the first connecting hole.

As a preferable scheme of the utility model, a lower die core mounting position for mounting the lower die core is arranged at the lower die.

As a preferable mode of the present utility model, the blow molding port is formed at a bottom center position of the lower mold core mounting position.

Compared with the prior art, the utility model has the beneficial effects that: according to the split blow molding die, the outer die component and the die core component are arranged, the die core component is arranged in the outer die component, a blow molding cavity is formed between the die core component and the outer die component, and the die core component is driven to ascend or descend by a die core connecting rod on a blow molding machine, so that the opening and closing of a blow molding opening are realized. When the blow molding materials do not need to be provided, the core mold assembly descends under the drive of the core mold connecting rod to seal the blow molding opening; when the blow molding material is needed to be provided again, the core mold assembly is driven by the core mold connecting rod to ascend, so that the core mold assembly is far away from the blow molding opening, namely the blow molding opening is opened, and the material is provided; the mode is simple and ingenious in structure, the blow molding cavity can be opened and closed according to actual needs, the quality of blow molding parts is prevented from being influenced by excessive materials, meanwhile, the waste of the materials can be reduced, the production cost of enterprises is reduced, and the popularization and the application of the blow molding die on a blow molding machine are facilitated.

Furthermore, the external die assembly is split into the external die and the lower die, the die core assembly is split into the upper die core and the lower die core, the lower die core can be replaced only by detaching the lower die, the whole die is not required to be replaced, the manufacturing cost and the using cost of the die can be greatly reduced, meanwhile, the mass of the lower die core is lighter than that of the whole die, and the lower die core is convenient to replace, so that the popularization and the application of the blow molding die structure on a blow molding machine are facilitated.

Drawings

FIG. 1 is a schematic view showing the structure of a split blow molding die in example 1;

FIG. 2 is a cross-sectional view of the structure at A-A in FIG. 1;

FIG. 3 is a schematic view showing the structure of an outer die in a split blow molding die according to example 1;

FIG. 4 is a structural cross-sectional view of an outer die in a split blow molding die of example 1;

FIG. 5 is a schematic view showing the structure of an upper mold core in a split blow molding die in example 1;

FIG. 6 is a sectional view of the upper core in a split blow molding die according to example 1;

FIGS. 7 and 8 are schematic views showing the structure of a split blow molding die core of embodiment 1;

FIG. 9 is a schematic view showing the structure of a split blow molding die middle-lower die in example 1;

FIG. 10 is a schematic view showing the structure of a split blow molding die core in accordance with example 2;

fig. 11 is a schematic view showing the structure of a split blow molding die middle-lower die in example 2.

Reference numerals: 1. an outer mold assembly; 1-1, an outer die; 1-1-1, a lower die mounting groove; 1-1-2, an upper mold core mounting hole; 1-2, a lower die; 2. a mold core assembly; 2-1, an upper mold core; 2-1-1, a first connecting hole; 2-2, lower mold core; 2-2-1, and a second connecting hole; 3. a blow molding chamber; 3-1, blow molding mouth.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Example 1: as shown in fig. 1 to 9, a split blow molding die is mainly split into an outer die assembly 1 and a die core assembly 2, wherein the die core assembly 2 is installed in the outer die assembly 1. In order to realize that can open and close the blowing chamber according to actual need, avoid influencing the quality of blowing spare because of the material is too much, can reduce simultaneously this technical purpose to the waste of material, connect the bush flange dish on the blowing machine with above-mentioned external mold subassembly 1, above-mentioned mold core subassembly 2 is connected on the mandrel connecting rod of blowing machine, form the blowing chamber 3 that supplies the material to pass through between above-mentioned mold core subassembly 2 and the above-mentioned external mold subassembly 1, above-mentioned external mold subassembly 1 bottom has the blowing mouth 3-1 with above-mentioned mold subassembly 2 bottom looks adaptation, open above-mentioned blowing mouth 3-1 when above-mentioned mandrel connecting rod upwards moves above-mentioned mold core subassembly 2, then seal blowing mouth 3-1 when above-mentioned mandrel connecting rod moves above-mentioned mold core subassembly 2 downwards, in order to avoid the waste of material.

In order to ensure the flow rate of the material in the blow molding cavity 3 and avoid the too fast or too slow flow rate, the cross section of the hollow part of the outer mold assembly 1 and the cross section of the mold core assembly 2 are arranged in a conical shape.

In this embodiment, the outer die assembly 1 is split into the outer die 1-1 and the lower die 1-2, the die core assembly 2 is split into the upper die core 2-1 and the lower die core 2-2, the upper die core 2-1 and the lower die core 2-2 are detachably connected through bolt connection and the like, the outer die assembly 1 is split into the outer die 1-1 and the lower die 1-2, the outer die 1-1 and the lower die 1-2 are also detachably connected through bolt connection and the like, in the actual use process, the lower die core 2-2 can be replaced only by detaching the lower die 1-2, the whole die does not need to be replaced, the manufacturing cost and the use cost of the die can be greatly reduced, and meanwhile, the lower die core 2-2 is lighter in mass than the whole die, so that the replacement is convenient, and the popularization and the application of the blow molding die structure on a blow molding machine are facilitated.

In order to facilitate the installation of the lower die 1-2, a lower die installation groove 1-1-1 is formed in the bottom of the outer die 1-1, the lower die 1-2 is installed at the lower die installation groove 1-1-1, and specifically, the cross section shapes of the lower die installation groove 1-1-1 and the lower die 1-2 can be cylindrical, so that the manufacturing and the processing are facilitated.

The outer die 1-1 is provided with an upper die core mounting hole 1-1-2, the upper die core 2-1 is mounted in the upper die core mounting hole 1-1-2, the upper die core mounting hole 1-1-2 is arranged at the center position of the outer die 1-1, and in order to ensure the quality of blow molding parts, the central axes of the outer die 1-1 and the upper die core 2-1 are arranged on the same straight line.

In order to facilitate the fixing of the upper mold core 2-1 on the core mold connecting rod on the blow molding machine, a connecting hole I2-1-1 for connecting the core mold connecting rod is arranged at the middle position of the upper mold core 2-1, the connecting hole I2-1-1 is a screw hole, and correspondingly, the core mold connecting rod is a screw rod, so that the accuracy of the upward or downward moving distance of the mold core assembly 2 is ensured, the feeding amount of the blow molding cavity 3 is ensured, and the blow molding quality of the blow molding machine is further ensured. The lower mold core 2-2 is provided with a second connecting hole 2-2-1 communicated with the first connecting hole 2-1-1, and likewise, the second connecting hole 2-2-1 is also a screw hole, and the core mold connecting rod can extend into the second connecting hole 2-2-1, so that the stability of the mold core assembly 2 in the moving process is further ensured.

The lower die 1-2 is provided with a lower die core mounting position 1-2-1 for mounting the lower die core 2-2, the shape of the lower die core mounting position 1-2-1 is matched with the external shape of the lower die core 2-2, the lower die core 2-2 can be embedded in the lower die core mounting position 1-2-1, connection can be realized without using other connecting pieces, and the mounting steps are reduced.

In order to ensure the blow molding effect, the blow molding port 3-1 is formed at the bottom center position of the lower mold core mounting position 1-2-1. In the embodiment, the cross section of the bottom of the lower die core 2-2 is square, and the shape of the blow molding port 3-1 at the middle position of the bottom of the lower die 1-2 is also square, so that the tightness of the contact position of the lower die core 2-2 and the lower die 1-2 is ensured, and the probability of material leakage is reduced.

According to the embodiment, the outer die assembly 1 is split into the outer die 1-1 and the lower die 1-2, the die core assembly 2 is split into the upper die core 2-1 and the lower die core 2-2, and the lower die core 2-2 can be replaced only by detaching the lower die 1-2 without replacing the whole die, so that the manufacturing cost and the using cost of the die can be greatly reduced, and meanwhile, the lower die core is lighter in mass than the whole die, and is convenient to replace, thereby being beneficial to popularization and application of the blow molding die structure on a blow molding machine.

The mounting sequence of the blow molding die in this embodiment is: firstly, mounting an upper mold core 2-1 on a core mold connecting rod on a blow molding machine; secondly, connecting the lower mold core 2-2 with the upper mold core 2-1; secondly, connecting the outer die 1-1 to a die flange plate of a blow molding machine; finally, the lower die 1-2 is mounted on the outer die 1-1, and the assembly of the blow molding die in this embodiment is completed.

Example 2: as shown in fig. 10 to 11, the distinguishing feature of this embodiment from this embodiment 1 is that, in a split blow molding die of this embodiment, the cross section of the bottom of the lower die core 2-2 is in a shape of a waist-shaped hole, and the shape of the blow molding port 3-1 at the middle position of the bottom of the lower die 1-2 is in a shape of a waist-shaped hole, so as to ensure the tightness of the contact position between the lower die core 2-2 and the lower die 1-2, and reduce the probability of material leakage. The cross section of the bottom of the lower mold core 2-2 can be any other shape, and the shape of the blow molding opening 3-1 is matched with the cross section, so that different blow molding requirements of a blow molding machine can be met.

Example 3: the present embodiment is different from embodiment 1 in that: in this embodiment, the outer mold assembly 1 and the mold core assembly 2 are of an integral structure, that is, the upper mold core 2-1 and the lower mold core 2-2 in the mold core assembly 2 are integrally formed, the outer die 1-1 and the lower die 1-2 in the outer mold assembly 1 are integrally formed, the blow molding opening 3-1 can be opened by moving the mold core assembly 2 upwards through the core mold connecting rod, and when the shape of the blow molding opening 3-1 needs to be changed, the outer mold assembly 1 and the mold core assembly 2 are disassembled respectively, and the mold core assembly 2 and the outer mold assembly 1 are installed respectively.

The split type blow molding mouth mold in the embodiment has the advantages that the blow molding cavity can be opened and closed according to actual needs, the quality of blow molding parts is prevented from being influenced by excessive materials, meanwhile, the waste of the materials can be reduced, the production cost of enterprises is reduced, and the popularization and the application of the blow molding mouth mold on a blow molding machine are facilitated.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model; thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the reference numerals in the figures are used more herein: 1. an outer mold assembly; 1-1, an outer die; 1-1-1, a lower die mounting groove; 1-1-2, an upper mold core mounting hole; 1-2, a lower die; 2. a mold core assembly; 2-1, an upper mold core; 2-1-1, a first connecting hole; 2-2, lower mold core; 2-2-1, and a second connecting hole; 3. a blow molding chamber; 3-1, blow molding, etc., but does not exclude the possibility of using other terms. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims

1. A split blow molding die is characterized in that: the plastic blow molding machine comprises an outer mold assembly (1) and a mold core assembly (2), wherein the outer mold assembly (1) is connected with a mouth mold flange plate of the blow molding machine, and the mold core assembly (2) is connected with a core mold connecting rod of the blow molding machine; the mold core assembly (2) is installed in the outer mold assembly (1), a blow molding cavity (3) for materials to pass through is formed between the mold core assembly (2) and the outer mold assembly (1), a blow molding opening (3-1) matched with the bottom of the mold core assembly (2) is formed in the bottom of the outer mold assembly (1), and the blow molding opening (3-1) is opened when the mold core connecting rod moves upwards the mold core assembly (2).

2. A split blow mold as in claim 1 wherein: the cross section of the hollow part of the outer die assembly (1) and the cross section of the die core assembly (2) are arranged in a conical mode.

3. A split blow mold as in claim 2 wherein: the outer die assembly (1) comprises an outer die (1-1) and a lower die (1-2), and the outer die (1-1) is detachably connected with the lower die (1-2).

4. A split blow mold as in claim 3 wherein: the bottom of the outer die (1-1) is provided with a lower die mounting groove (1-1-1), and the lower die (1-2) is mounted at the lower die mounting groove (1-1-1).

5. A split blow mold as in claim 3 or 4 wherein: the mold core assembly (2) comprises an upper mold core (2-1) and a lower mold core (2-2), and the lower mold core (2-2) is detachably connected with the upper mold core (2-1).

6. The split blow mold as in claim 5 wherein: the outer die (1-1) is provided with an upper die core mounting hole (1-1-2), and the upper die core (2-1) is mounted in the upper die core mounting hole (1-1-2).

7. The split blow mold as in claim 6 wherein: the upper mold core (2-1) is provided with a first connecting hole (2-1-1) for connecting the core mold connecting rod.

8. The split blow mold as in claim 7 wherein: the lower mold core (2-2) is provided with a second connecting hole (2-2-1) communicated with the first connecting hole (2-1-1).

9. The split blow mold as in claim 8 wherein: the lower die (1-2) is provided with a lower die core mounting position (1-2-1) for mounting the lower die core (2-2).

10. The split blow mold as in claim 9, wherein: the blow molding opening (3-1) is formed at the bottom center position of the lower mold core mounting position (1-2-1).