阅读说明：本技术 一种吹气芯轴机构及中空吹塑机 (Blowing mandrel mechanism and hollow blow molding machine ) 是由 焦二辉 方长平 于 2019-10-17 设计创作，主要内容包括：本发明公开了一种吹气芯轴机构,涉及吹塑机技术领域,其包括电动推杆、两级伸缩机构、内芯轴；所述内芯轴设置在两级伸缩机构内,由电动推杆驱动,并在电动推杆输出动力时,驱动两级伸缩机构展开,内芯轴为空心结构,其通过上开设有连通孔与冷风进风孔连接,且所述内芯轴内还安装有稳压机构,用于调整冷风压力；两级伸缩机构上开设有出气孔,且在内芯轴驱动两级伸缩机构展开时,出气孔与内芯轴保持连通,本发明的有益效果是：内芯轴处于两级伸缩机构内,既不影响内芯轴的正常伸缩,同时也能对内芯轴形成良好的防护,特别是稳压机构的设计,能使冷风以稳定的压力从出气孔排出,其结构与内芯轴结合为一体,无需在外部加装稳压阀等装置。(The invention discloses a blowing mandrel mechanism, which relates to the technical field of blow molding machines and comprises an electric push rod, a two-stage telescopic mechanism and an inner mandrel; the inner core shaft is arranged in the two-stage telescopic mechanism, is driven by the electric push rod and drives the two-stage telescopic mechanism to expand when the electric push rod outputs power, is of a hollow structure and is connected with the cold air inlet hole through a communication hole formed in the inner core shaft, and is also internally provided with a pressure stabilizing mechanism for adjusting the pressure of cold air; the two-stage telescoping mechanism is provided with air outlet holes, and when the inner core shaft drives the two-stage telescoping mechanism to expand, the air outlet holes are communicated with the inner core shaft, and the two-stage telescoping mechanism has the beneficial effects that: the inner core shaft is arranged in the two-stage telescopic mechanism, normal telescopic of the inner core shaft is not influenced, meanwhile, the inner core shaft can form good protection, particularly, the design of the pressure stabilizing mechanism enables cold air to be discharged from the air outlet hole under stable pressure, the structure of the pressure stabilizing mechanism is combined with the inner core shaft into a whole, and devices such as a pressure stabilizing valve and the like do not need to be additionally arranged outside.)

1. A blowing mandrel mechanism, comprising:

an electric push rod (1);

the inner mandrel (5) is arranged in the two-stage telescopic mechanism, is driven by the electric push rod (1) and drives the two-stage telescopic mechanism to expand when the electric push rod (1) outputs power, the inner mandrel (5) is of a hollow structure and is connected with a cold air inlet hole (16) through a communicating hole (17) formed in the inner mandrel (5), and a pressure stabilizing mechanism is further arranged in the inner mandrel (5) and used for adjusting the pressure of cold air;

and the two-stage telescopic mechanism is provided with an air outlet (10), and when the inner core shaft (5) drives the two-stage telescopic mechanism to expand, the air outlet (10) is communicated with the inner core shaft (5).

2. The blowing mandrel mechanism of claim 1, wherein the two-stage telescoping mechanism comprises a second-stage sleeve shaft (4) nested in a first-stage sleeve shaft (3), the first-stage sleeve shaft (3) is fixed on the fixing seat (2), and an opening of the first-stage sleeve shaft (3) is connected with a fixing step (7) arranged on the second-stage sleeve shaft (4) through a connecting spring (6).

3. The blowing mandrel mechanism of claim 2, wherein the secondary sleeve shaft (4) is provided with a gas blocking block (8) at a position corresponding to the gas outlet (10) in a sealing manner, the gas blocking block is used for blocking the gas outlet (10), and when the gas blocking block (8) is pushed open by the inner mandrel (5), the gas blocking block (8) loses the blocking of the gas outlet (10).

4. A blowing mandrel mechanism according to claim 3 characterised in that the gas block (8) is connected to the secondary mandrel (4) by a closing spring (9).

5. The blowing mandrel mechanism of claim 4, wherein the pressure stabilizing mechanism comprises a butting block (15) fixed at the head end of the inner mandrel (5), a mounting shaft (11) is fixed at the bottom of the butting block (15), an air pressure adjusting sheet (13) is hermetically matched on the mounting shaft (11), the air pressure adjusting sheet (13) is connected with the butting block (15) through an air pressure adjusting spring (12), and an exhaust hole (14) is formed in the side wall of the inner mandrel (5).

6. A blowing mandrel mechanism according to claim 3 or 4 or 5 characterised in that the number of the exhaust holes (14) and the air outlet holes (10) is plural and arranged in the radial direction of the inner mandrel (5) and the secondary mandrel (4), respectively.

7. A blow molding machine comprising a blowing mandrel mechanism according to any one of claims 1 to 6.

Technical Field

The invention relates to the technical field of blow molding machines, in particular to a blowing mandrel mechanism and a hollow blow molding machine.

Background

A blow molding machine is a machine that blows a liquid plastic material and then blows the plastic material into a cavity having a predetermined shape by the wind force of the machine, and the machine is called a blow molding machine. The plastic is melted in a screw extruder and extruded quantitatively, then the plastic is formed through a mouth film, an air ring is used for blowing and cooling, then a tractor is used for drawing at a certain speed, and a winding machine is used for winding the plastic into a coil.

The existing blow molding machine can not ensure the pressure stability of cold air in the blowing process, and the blowing needle of the existing blow molding machine is exposed in the air and is easy to damage. Based on this, this application has proposed a blowing dabber mechanism and hollow blow molding machine.

Disclosure of Invention

The invention aims to provide a blowing mandrel mechanism and a hollow blow molding machine, which aim to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a blowing mandrel mechanism comprises an electric push rod, a two-stage telescopic mechanism and an inner mandrel; the inner core shaft is arranged in the two-stage telescopic mechanism, is driven by the electric push rod and drives the two-stage telescopic mechanism to expand when the electric push rod outputs power, is of a hollow structure and is connected with the cold air inlet hole through a communication hole formed in the inner core shaft, and is also internally provided with a pressure stabilizing mechanism for adjusting the pressure of cold air; and when the inner core shaft drives the two-stage telescopic mechanism to expand, the air outlet hole is communicated with the inner core shaft.

As a still further scheme of the invention: the two-stage telescopic mechanism comprises a second-stage sleeve shaft nested in the first-stage sleeve shaft, the first-stage sleeve shaft is fixed on the fixed seat, and an opening of the first-stage sleeve shaft is connected with a fixed step arranged on the second-stage sleeve shaft through a connecting spring.

As a still further scheme of the invention: the position corresponding to the air outlet hole in the secondary sleeve shaft is matched with the air blocking block in a sealing mode and used for blocking the air outlet hole, and when the air blocking block is pushed open by the inner core shaft, the air blocking block loses the blocking of the air outlet hole.

As a still further scheme of the invention: the air blocking block is connected with the secondary sleeve shaft through a closing spring.

As a still further scheme of the invention: the pressure stabilizing mechanism is including the butt piece of fixing at the inner core axle head end, the bottom of butt piece is fixed with the installation axle, and the epaxial sealed cooperation of installation has the atmospheric pressure adjustment piece, and passes through the atmospheric pressure regulation spring coupling between atmospheric pressure adjustment piece and the butt piece, has seted up the exhaust hole on the lateral wall of inner core axle.

As a still further scheme of the invention: the number of the exhaust holes and the number of the air outlet holes are multiple and are respectively arranged along the radial direction of the inner core shaft and the second-stage sleeve shaft.

A blow molding machine comprising a blowing mandrel mechanism as described above.

Compared with the prior art, the invention has the beneficial effects that: the inner core shaft is arranged in the two-stage telescopic mechanism, normal telescopic of the inner core shaft is not influenced, meanwhile, the inner core shaft can form good protection, particularly, the design of the pressure stabilizing mechanism enables cold air to be discharged from the air outlet hole under stable pressure, the structure of the pressure stabilizing mechanism is combined with the inner core shaft into a whole, devices such as a pressure stabilizing valve and the like do not need to be additionally arranged outside, and the structure is greatly simplified.

Drawings

Fig. 1 is a schematic structural view of a blowing mandrel mechanism.

Fig. 2 is a schematic view of the internal structure of a blowing mandrel mechanism.

Fig. 3 is an enlarged view of a structure of fig. 2.

In the figure: 1-electric push rod, 2-fixed seat, 3-primary sleeve shaft, 4-secondary sleeve shaft, 5-inner core shaft, 6-connecting spring, 7-fixed step, 8-air blocking block, 9-closed spring, 10-air outlet hole, 11-mounting shaft, 12-air pressure adjusting spring, 13-air pressure adjusting sheet, 14-air outlet hole, 15-abutting block, 16-cold air inlet hole and 17-communicating hole.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.