CN110696329A

CN110696329A - Blowing mandrel mechanism and hollow blow molding machine

Info

Publication number: CN110696329A
Application number: CN201910986646.4A
Authority: CN
Inventors: 焦二辉; 方长平
Original assignee: 焦二辉
Current assignee: Cangzhou Zhifang pharmaceutical packaging material technology Co., Ltd
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-01-17

Abstract

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.

Description

Blowing mandrel mechanism and hollow blow molding machine

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.

Example 1

Referring to fig. 1 to 3, in an embodiment of the present invention, an air blowing mandrel mechanism includes an electric push rod 1, a two-stage telescopic mechanism, and an inner mandrel 5;

in the present embodiment, the first and second electrodes are,

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 communication 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 cold air pressure;

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

In practical application, the electric push rod 1 firstly works to enable the two-stage telescopic mechanism to be unfolded, when the two-stage telescopic mechanism is completely unfolded, the air outlet 10 and the inner core shaft 5 are provided, at the moment, cold air enters the inner core shaft 5 through the cold air inlet 16, is treated by the pressure stabilizing mechanism, and is discharged from the air outlet 10 at stable pressure to perform blow molding.

Specifically speaking, two-stage telescopic machanism is including the second grade sleeve shaft 4 of nestification in one-level sleeve shaft 3, and of course, one-level sleeve shaft 3 and second grade sleeve shaft 4 are both sliding fit, and one-level sleeve shaft 3 is fixed on fixing base 2, and the opening part of one-level sleeve shaft 3 passes through connecting spring 6 to be connected with the fixed step 7 that sets up on second grade sleeve shaft 4, and connecting spring 6 sets up the purpose and mainly makes second grade sleeve shaft 4 ability automatic re-setting.

The sealed cooperation of the position department that corresponds venthole 10 in the second grade sleeve shaft 4 has stifled gas piece 8 for carry out the shutoff to venthole 10, and when stifled gas piece 8 was opened by inner core shaft 5 top, stifled gas piece 8 lost the shutoff effect to venthole 10, stifled gas piece 8 is connected with second grade sleeve shaft 4 through closed spring 9, and inner core shaft 5 breaks away from the back of contacting with stifled gas piece 8, and under closed spring 9's effect, stifled gas piece 8 carries out the shutoff to venthole 10 down.

Pressure stabilizing mechanism is including the butt piece 15 of fixing at 5 head ends of inner core axle, and butt piece 15 is contacting and is pushing up the 8 motion of stifled gas piece with stifled gas piece 8 when inner core axle 5 receives electric putter 1 to promote, the bottom of butt piece 15 is fixed with installation axle 11, and the sealed cooperation has atmospheric pressure adjustment piece 13 on the installation axle 11, and is connected through atmospheric pressure adjusting spring 12 between atmospheric pressure adjustment piece 13 and the butt piece 15, has seted up exhaust hole 14 on the lateral wall of inner core axle 5, and under balanced state, atmospheric pressure adjustment piece 13 carries out the shutoff to exhaust hole 14.

Preferably, in the present embodiment, the number of the exhaust holes 14 and the number of the exhaust holes 10 are multiple and are respectively arranged along the radial direction of the inner mandrel 5 and the secondary sleeve mandrel 4.

In practical application, when blow molding is required, the electric push rod 1 drives the inner core shaft 5 to be ejected out, the butting block 15 is contacted with the air blocking block 8 in the ascending process, the air blocking block 8 is driven to synchronously ascend, the closing spring 9 is compressed, the air blocking block 8 loses the blocking effect on the air outlet hole 10, the air outlet hole 10 is communicated with the outside, external cold air enters the inner core shaft 5 through the cold air inlet hole 16 and drives the air pressure adjusting sheet 13 to move upwards, the air pressure adjusting spring 12 is compressed, the air pressure adjusting sheet 13 loses the blocking effect on the air outlet hole 14, and finally the cold air is discharged from the air outlet hole 10 at stable pressure.

It should be noted that, in order to ensure the sealing performance, in the present embodiment, sealing rings are respectively disposed between the secondary sleeve shaft 4 and the air lock 8, between the inner core shaft 5 and the air pressure adjusting sheet 13, and between the primary sleeve shaft 3 and the secondary sleeve shaft 4, so as to ensure the sealing performance.

Example 2

The blowing mandrel mechanism is provided in the embodiment of the invention, the hollow blow molding machine is provided based on the blowing mandrel mechanism, the devices such as an extruder and a blow molding die of the hollow blow molding machine are not shown, the inner mandrel 5 is arranged in the two-stage telescopic mechanism, the normal telescopic of the inner mandrel 5 is not influenced, meanwhile, the inner mandrel 5 can form good protection, particularly, the design of the pressure stabilizing mechanism can enable cold air to be discharged from the air outlet 10 at stable pressure, the structure of the blowing mandrel mechanism and the inner mandrel 5 are combined 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.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

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.