Gasket of film blowing machine

Abstract

The utility model provides a gasket of a film blowing machine, which belongs to the technical field of film blowing machines and comprises a gasket body, a sealing lip, a reinforcing rib and a connecting component, the gasket body is of an annular structure and is used for sealing a gap between a die head of the film blowing machine and a cooling ring; the sealing lips are arranged on the two sides of the gasket body, are of a lip-shaped structure, are in a tight structure with a die head and a cooling ring of the film blowing machine and are used for forming a sealing barrier so as to prevent molten plastic from leaking. The reinforcing ribs are arranged on the gasket body and used for enhancing the strength of the gasket body so as to prevent the gasket body from deforming and losing efficacy under high temperature and high pressure. The connecting assembly is arranged at the position where the gasket body is in contact with a die head and a cooling ring of the film blowing machine; the film blowing machine can solve the problem that under the action of high temperature and high pressure, a gap between a die head and a cooling ring of an existing film blowing machine easily leaks molten plastic or external air enters the gap, so that the product quality is reduced or the production efficiency is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of blowing film machine, concretely relates to a blowing film machine gasket. BACKGROUND

[0002] The blowing film machine is a kind of equipment for producing plastic film, and is widely used in packaging, agriculture, food, medicine and other industries.It is stretched into a certain thickness and width by airflow, and then the final film product is obtained through the process of cooling and winding.The main components of blowing film machine include: extruder for heating and extruding plastic particles, usually composed of screw, cylinder and heating system.The screw pushes and heats the plastic particles to a molten state;The extruded molten plastic forms a thin film through the die head, and the shape and size of the die head determine the width of the final film;After the molten plastic passes through the die head, it is blown into a film by airflow to form a hollow air bag, and the thickness and uniformity of the film are mainly controlled by the strength and speed of the airflow;The film is quickly cooled by cooling air ring or cooling water tank to ensure stable film formation;The cooled film is wound into a roll for subsequent processing or use.

[0003] The gap between the die head and the cooling ring of the existing blowing film machine is prone to leakage of molten plastic or external air under the action of high temperature and high pressure, resulting in reduced product quality or production efficiency. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a blowing film machine gasket, which can solve the problem of leakage of molten plastic or external air under the action of high temperature and high pressure due to the gap between the die head and the cooling ring of the existing blowing film machine, resulting in reduced product quality or production efficiency.

[0005] The utility model is realized as follows:

[0006] The utility model provides a blowing film machine gasket, which includes a gasket body, a sealing lip, a reinforcing rib and a connecting assembly, the gasket body is annular structure, is used for sealing the gap between the die head and the cooling ring of blowing film machine;The sealing lip is arranged on both sides of the gasket body, and is in lip-shaped structure, which is tightly connected with the die head and the cooling ring of the blowing film machine, to form a sealing barrier to prevent molten plastic from leaking;The reinforcing rib is arranged on the gasket body to enhance the strength and stability of the gasket body, to prevent the gasket body from deforming and failing under high temperature and high pressure;The connecting assembly is arranged at the position where the gasket body contacts with the die head and the cooling ring of the blowing film machine, and the connecting assembly is used to fix the gasket at the corresponding position of the blowing film machine.

[0007] On the basis of the above technical solutions, the gasket of the film blowing machine can be further improved as follows:

[0008] The gasket body is a double-layer structure, and the inner and outer layers are made of different materials to enhance the wear resistance, corrosion resistance and high temperature resistance of the gasket body.

[0009] Further, the double-layer structure of the gasket body is connected and fixed by sealing glue, and the sizes of the two are the same.

[0010] Further, the reinforcing rib is a grid structure for enhancing the deformation resistance of the sealing lip.

[0011] Further, a transition layer is arranged between the gasket body and the sealing lip to reduce stress concentration and improve the service life of the gasket.

[0012] Further, the cross-sectional shape of the sealing lip is one of O-shaped, D-shaped, V-shaped and U-shaped, O-shaped for low pressure sealing, D-shaped for medium pressure sealing, and V-shaped and U-shaped for high pressure sealing.

[0013] Further, the gasket body is made of one of silicone rubber and fluorine rubber to seal the gap of the film blowing machine while resisting high temperature, high pressure and corrosive environment.

[0014] Further, the reinforcing rib is made of reinforced plastic material.

[0015] Further, a bolt hole is formed on the gasket body, the connecting assembly is a sealing bolt structure, a threaded ring is arranged on the outer wall of the connecting assembly connected with the bolt hole, and a threaded ring matched with the threaded ring of the bolt hole is also arranged on the inner wall of the bolt hole.

[0016] Further, the sealing bolt structure is provided with a silica gel layer at both ends to improve the sealing property of the gasket.

[0017] Compared with the prior art, the gasket of the film blowing machine has the following advantages:

[0018] The gasket body is the core part of the entire gasket, usually adopts an annular structure, and mainly functions to seal the gap between the die head and the cooling ring of the film blowing machine, effectively preventing the leakage of molten plastic under high temperature and high pressure, and ensuring the normal operation of the film blowing machine. The gasket body needs to withstand high temperature and high pressure during the operation of the film blowing machine to ensure that the sealing property is maintained under extreme working conditions. According to the different operating environments of the film blowing machine, the material of the gasket body is usually silicone rubber or fluorine rubber, which has good high temperature resistance and corrosion resistance, and can effectively cope with harsh environments. The gasket body adopts a double-layer structure, and different materials are used for the inner and outer layers, which not only improves the sealing property of the gasket, but also enhances the wear resistance, corrosion resistance and high temperature resistance of the gasket.

[0019] The sealing lips are arranged on both sides of the gasket body and have a lip-shaped structure, which is in direct contact with the die head and cooling ring of the film blowing machine. The close contact between the sealing lips and the die head and cooling ring prevents the leakage of molten plastic and ensures the seal between the die head and the cooling ring. The design and cross-sectional shape of the sealing lips directly affect the sealing performance of the gasket. The O-shape is suitable for low-pressure environments and has better sealing. The D-shape is suitable for medium-pressure environments and has moderate sealing effect. The V-shape and U-shape are suitable for high-pressure sealing, can withstand larger pressure differences and provide more secure sealing. The sealing lips are usually made of flexible materials to ensure that they can fit tightly to the die head and cooling ring, but they may be easily deformed under high pressure. Therefore, adding a reinforcing rib design can effectively enhance the sealing lip's ability to resist deformation.

[0020] Reinforcement ribs are structural components added to the gasket body, typically in a grid-like structure, distributed on the surface or inside of the gasket body. These ribs stabilize the gasket body in high-temperature, high-pressure environments, preventing deformation due to external forces or temperature fluctuations and ensuring its reliability over long-term use. Under high-pressure conditions, the gaskets of film blowing machines are subjected to significant mechanical stress. The ribbed grid structure effectively disperses this stress, preventing deformation or failure of the gasket body. By increasing the strength of the sealing lip and gasket body, the gasket's sealing effectiveness is further enhanced, preventing leakage of molten plastic. The grid-like ribs help improve the gasket body's resistance to deformation, especially under high-pressure conditions, by better maintaining the shape of the sealing lip and thus maintaining stable sealing performance.

[0021] The design of the connector assembly ensures the gasket is securely fastened between the die head and cooling ring of the film blowing machine. Its primary function is to connect with the bolt holes in the gasket body, firmly securing the gasket in place in the film blowing machine and preventing it from shifting due to heat or mechanical vibration during operation. The connector assembly utilizes a sealed bolt structure with threaded rings on the inner and outer walls of the bolt holes. These tightening threads enhance the connection and improve overall sealing. Silicone coatings on both ends of the connector assembly improve sealing, reduce potential minor leaks, and prevent molten plastic from leaking even in high-temperature and high-pressure environments.

[0022] Providing a transition layer between the gasket body and the sealing lip can alleviate contact stress between the sealing lip and the gasket body, thereby avoiding localized stress concentration and extending the gasket's service life. By alleviating stress concentration, the transition layer design can effectively improve the gasket's durability and reduce the rate of deformation or aging of the sealing lip. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor.

[0024] Fig. 1 It is a structure schematic view of the gasket of the film blowing machine;

[0025] Fig. 2 It is a structure schematic view of the gasket body;

[0026] In the drawings, the component list represented by each sign is as follows:

[0027] 10, gasket body; 20, sealing lip; 30, reinforcing rib; 40, connecting assembly. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application.

[0029] As Figs. 1-2 shown, it is an embodiment of the gasket of the film blowing machine provided by the present application, in the embodiment, including gasket body 10, sealing lip 20, reinforcing rib 30 and connecting assembly 40, gasket body 10 is annular structure, used for sealing the gap between the die head and the cooling ring of the film blowing machine; sealing lip 20 is arranged on both sides of gasket body 10, and is in lip-shaped structure, and is in close structure with the die head and the cooling ring of the film blowing machine, used for forming a sealing barrier to prevent molten plastic from leaking; reinforcing rib 30 is arranged on gasket body 10, used for enhancing the strength and stability of gasket body 10, to prevent gasket body 10 from deforming and failing under high temperature and high pressure; gasket body 10 is provided with connecting assembly 40 at the position contacting the die head and the cooling ring of the film blowing machine, and connecting assembly 40 is used for fixing the gasket at the corresponding position of the film blowing machine.

[0030] In the above technical scheme, gasket body 10 is a double-layer structure, and the inner and outer layers adopt different materials, used for enhancing the wear resistance, corrosion resistance and high temperature resistance of gasket body 10.

[0031] Further, in the above technical scheme, the double-layer structure of gasket body 10 is connected and fixed through sealing glue, and the sizes of the two are the same.

[0032] Further, in the above technical scheme, reinforcing rib 30 is in grid-shaped structure, used for enhancing the anti-deformation ability of sealing lip 20.

[0033] Further, in the above technical solution, a transition layer is arranged between the gasket body 10 and the sealing lip 20, for reducing stress concentration and improving the service life of the gasket.

[0034] Further, in the above technical solution, the cross-sectional shape of the sealing lip 20 is one of O-shaped, D-shaped, V-shaped and U-shaped, the O-shaped is used for low-pressure sealing, the D-shaped is used for medium-pressure sealing, and the V-shaped and U-shaped are used for high-pressure sealing.

[0035] Further, in the above technical solution, the gasket body 10 is made of one of silicone rubber and fluororubber, for sealing the gap of the film blowing machine while resisting high temperature, high pressure and corrosive environment.

[0036] Further, in the above technical solution, the reinforcing rib 30 is made of reinforced plastic material.

[0037] Further, in the above technical solution, a bolt hole is formed on the gasket body 10, and the connecting assembly 40 is a sealing bolt structure, which is provided with a threaded ring at the outer wall connected with the bolt hole, and the inner wall of the bolt hole is also provided with a threaded ring matched therewith.

[0038] Further, in the above technical solution, the sealing bolt structure is provided with a silica gel layer at both ends, for improving the sealing property of the gasket.

[0039] Specifically, the principle of the utility model is: when in use, check the integrity of the gasket to ensure that there is no damage or crack, and the sealing lip is not worn. Ensure that the installation position of the die head and the cooling ring is aligned, place the gasket between the die head and the cooling ring, and ensure that the sealing lip of the gasket is completely matched with the contact surface. Use a wrench to tighten the connecting assembly to ensure that the gasket is uniformly stressed.

Claims

1. A film blowing machine gasket, characterized in that: The invention comprises a gasket body (10), a sealing lip (20), a reinforcing rib (30) and a connecting assembly (40), wherein the gasket body (10) is an annular structure and is used to seal the gap between the die head and the cooling ring of the film blowing machine; the sealing lip (20) is arranged on both sides of the gasket body (10) and is in a lip-shaped structure, and is tightly structured with the die head and the cooling ring of the film blowing machine to form a sealing barrier to prevent leakage of molten plastic; the reinforcing rib (30) is arranged on the gasket body (10) and is used to enhance the strength and stability of the gasket body (10) to prevent the gasket body (10) from deforming and failing under high temperature and high pressure; the connecting assembly (40) is arranged at the position where the gasket body (10) contacts the die head and the cooling ring of the film blowing machine, and the connecting assembly (40) is used to fix the gasket at a corresponding position of the film blowing machine.

2. A film blowing machine gasket according to claim 1, characterized in that: The washer body (10) is a double-layer structure, with the inner and outer layers made of different materials, so as to enhance the wear resistance, corrosion resistance and high temperature resistance of the washer body (10).

3. A film blowing machine gasket according to claim 2, characterized in that: The double-layer structures of the gasket body (10) are connected and fixed by means of sealant, and the two have the same size.

4. A film blowing machine gasket according to claim 3, characterized in that: The reinforcing ribs (30) are a grid-like structure and are used to enhance the anti-deformation capability of the sealing lip (20).

5. A film blowing machine gasket according to claim 4, characterized in that: A transition layer is provided between the gasket body (10) and the sealing lip (20) to reduce stress concentration and increase the life of the gasket.

6. A film blowing machine gasket according to claim 5, characterized in that: The cross-sectional shape of the sealing lip (20) is one of O-shape, D-shape, V-shape and U-shape, wherein the O-shape is used for low-pressure sealing, the D-shape is used for medium-pressure sealing, and the V-shape and U-shape are used for high-pressure sealing.

7. A film blowing machine gasket according to claim 6, characterized in that: The gasket body (10) is made of one of silicone rubber and fluororubber, and is used to seal the gap of the film blowing machine while enduring high temperature, high pressure and corrosive environment.

8. The film blowing machine gasket according to claim 7, characterized in that: The reinforcing rib (30) is made of reinforced plastic.

9. The film blowing machine gasket according to claim 8, characterized in that: The washer body (10) is provided with a bolt hole, and the connecting assembly (40) is a sealing bolt structure, wherein a threaded ring is provided at the outer wall connected to the bolt hole, and a threaded ring matching the inner wall of the bolt hole is also provided.

10. The film blowing machine gasket according to claim 9, characterized in that: Both ends of the sealing bolt structure are provided with a silicone layer to improve the sealing performance of the gasket.

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