WO2020135387A1

WO2020135387A1 - Glue-mixing method for high-viscosity two-component glue

Info

Publication number: WO2020135387A1
Application number: PCT/CN2019/127775
Authority: WO
Inventors: 刘元江; 欧文科; 王国元
Original assignee: 歌尔股份有限公司
Priority date: 2018-12-24
Filing date: 2019-12-24
Publication date: 2020-07-02
Also published as: CN109513358A

Abstract

A glue-mixing method for high-viscosity two-component glue, comprising the following steps: preheating a resin component; degassing the resin component; preheating a curing agent component; using a screw pump for metering and conveying the preheated resin component into a dynamic mixer; using a gear pump for metering and conveying the preheated curing agent component into the dynamic mixer; mixing the resin component and the curing agent component into two-component glue in the dynamic mixer; and outputting the mixed two-component glue from the rear end of the dynamic mixer.

Description

High-viscosity two-component glue mixing method

Technical field

The present disclosure belongs to the technical field of production and processing. More specifically, the present disclosure relates to a method for mixing high-viscosity two-component glue.

Background technique

Two-component glue is a two-component thing, which can only be bonded after being mixed in a certain proportion. A single glue that does not naturally cure if separated.

In the prior art, there is an increasing demand for high thermal conductivity, high temperature resistance and high toughness glue in the motor industry, especially the driving motor in the electric vehicle industry. The high-performance two-component glue often has the problem of very difficult mixing operation. The resin with high temperature resistance itself has a relatively large molecular weight and high viscosity. In addition to the addition of thermally conductive fillers and tougheners, the viscosity of the glue is higher. inconvenient. Moreover, the ratio of such two-component glues is generally quite different. The weight ratio of the resin component and the curing agent component ranges from 100:1 to 100:30. Compared with the 1:1 glue, there are two components Due to the large difference in viscosity and physical properties, it is more difficult to mix them evenly with automatic glue mixing equipment, and it is also easy to produce bubbles, and manual mixing is even more laborious.

Therefore, it is necessary to provide an improved high-viscosity two-component glue mixing method.

Public content

An object of the present disclosure is to provide a new technical solution for a high-viscosity two-component glue mixing method.

According to an aspect of the present disclosure, a method for mixing a high-viscosity two-component glue is provided, including the following steps:

Pre-heat treatment of resin components;

Degassing resin components;

Pre-heat treatment of curing agent components;

Use a screw pump to meter and deliver the preheated resin components to the dynamic mixer;

Use a gear pump to meter and deliver the preheated curing agent components to the dynamic mixer;

The resin component and the curing agent component are mixed into a two-component glue in a dynamic mixer;

The mixed two-component glue is output from the rear end of the dynamic mixer.

Optionally, the following steps are also included:

Use the pressure plate pump or plunger pump to transfer the preheated and degassed resin components to the input end of the screw pump;

Optionally, the following steps are also included:

Filter the resin component before using the platen pump or plunger pump to deliver the resin component;

Optionally, the following steps are also included:

Continuous heating of the resin component delivery pipeline.

Optionally, the following steps are also included:

Transfer the pre-heated curing agent component to the input end of the gear pump used for metering;

Optionally, dry compressed air is used for pressure delivery of the preheated curing agent component.

Optionally, the following steps are also included:

Carry out product filling operation on the two-component glue output from the rear end of the dynamic mixer;

Optionally, the following steps are also included:

Heat the two-component glue after curing.

Optionally, the two-component glue performs a glue filling operation under vacuum conditions.

Optionally, after the resin component is preheated, the resin component is degassed under vacuum conditions.

Other features and advantages of the present disclosure will become clear through the following detailed description of exemplary embodiments of the present disclosure with reference to the drawings.

BRIEF DESCRIPTION

The drawings that constitute a part of the description describe embodiments of the present disclosure, and together with the description serve to explain the principles of the present disclosure.

FIG. 1 is a schematic flowchart of some embodiments of the present disclosure.

FIG. 2 is a schematic flowchart of some other embodiments of the present disclosure.

detailed description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the drawings. It should be noted that the relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

The following description of at least one exemplary embodiment is actually merely illustrative, and in no way serves as any limitation to the present disclosure and its application or use.

Techniques and equipment known to those of ordinary skill in the related art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered as part of the description.

In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiment may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following drawings, therefore, once an item is defined in one drawing, there is no need to discuss it further in subsequent drawings.

According to an aspect of the present invention, a method for mixing high-viscosity two-component glue is provided. Referring to FIG. 1, the method includes the following steps:

Pre-heat treatment of resin components. It can be carried out in a sealed heating device. Heating reduces the viscosity of the resin component and improves the fluidity of the resin component. The viscosity curves of the resin components with different additives and different ratios of the adders are different. A person skilled in the art can select an appropriate preheating temperature according to the viscosity curve of the resin component used, so that the viscosity of the resin component meets the requirements.

Degas the resin component. The resin component is usually pre-mixed with thermally conductive filler and toughening agent, and the viscosity is large. The bubbles generated during pre-mixing and stirring are usually bound to the viscous resin component. After mixing to form a two-component glue, it affects the two-component component. The quality of the glue. The resin component of the present disclosure undergoes degassing treatment to reduce bubbles existing in the viscous resin component and ensure the quality of the two-component glue after mixing.

Pre-heat treatment of the curing agent component to reduce the viscosity of the curing agent component; on the other hand, to reduce the temperature difference when the curing agent component and the resin component are mixed, to prevent the local viscosity increase of the resin component to cause uneven mixing and improve the mixing effectiveness. Further, the preheating temperature of the curing agent component can be selected to be the same as the preheating temperature of the resin component.

At the front end of the dynamic mixer, a screw pump is used to meter and deliver the preheated resin component to the dynamic mixer, and a gear pump is used to meter and deliver the preheated curing agent component to the dynamic mixer. The viscosity of the resin component is high, and the screw pump is used for forced delivery, and the screw pump can continuously quantify the output, and the input amount of the resin component per unit time can be quantified according to the rotation speed of the screw pump to meet the ratio requirement. The viscosity of the curing agent component is low, and the gear pump can be used to measure according to the speed.

The resin component and the curing agent component are mixed into a two-component glue in the dynamic mixer; the structure of the dynamic mixer can be a straight tube, and a spiral stirring shaft is provided along the radial direction of the straight tube. The diameter is slightly smaller than the inner diameter of the straight pipe, which is driven by the motor at the front end of the dynamic mixer. The pressure of the resin component measured by the screw pump is 5kg/cm ² to 10kg/cm ² , and the pressure of the curing agent component measured by the gear pump is 2kg/cm ² to 5kg/cm ² . The two-component glue will not cross-flow in the dynamic mixer. The resin component and the curing agent component are input into the straight pipe from both sides of the front end of the dynamic mixer. Rotate to move and mix while mixing. After mixing evenly, it is forced to be conveyed by the rear end of the axial dynamic mixer with screw agitation, and there will be no cross flow phenomenon, which enables the present disclosure to produce high-mixed high-viscosity two-component glue.

The mixed two-component glue is output from the rear end of the dynamic mixer to obtain the required two-component glue.

According to the technical solution of the present disclosure, the viscosity of the resin component under heating becomes low, the fluidity increases, and the degassing treatment is easily performed without stirring. In addition, the generation of air bubbles is related to agitation. In the present disclosure, there is no agitation operation in the previous step, and no new air bubbles will be added; the mixing process of the glue is performed in a nearly sealed state, especially after the two-component glue reaches the dynamic mixer At the end, the mixing and stirring are performed in a sealed state, and no bubbles are generated in the two-component glue, which ensures the quality of the two-component glue mixed under the technical solution of the present disclosure.

On the other hand, the present disclosure facilitates cleaning when the equipment is not in production. In the entire process route, there is only a two-component glue that is easily cured in the dynamic mixer, and the solid mixer can be removed for cleaning; the resin component And the material in the conveying pipe of the curing agent component can be returned under heating.

In some embodiments, the curing agent component delivered to the dynamic mixer accounts for 1% to 30% of the weight of the resin component delivered to the dynamic mixer. Of course, in other embodiments, the weight ratio of the curing agent component to the resin component may also be 1:1 or other ratios, and this method can be used for the production of mixed rubber.

In some embodiments, referring to FIG. 2, a pre-heated and degassed resin component is delivered using a platen pump or plunger pump. The transmission pipeline is in a sealed environment. After preheating, the viscosity of the resin component is reduced, and the fluidity is increased, which is convenient for forced delivery using a platen pump or plunger pump; it can also avoid air entering the delivery pipe and mixing with the resin component to regenerate air bubbles, and ensure product quality. Further, a buffer tank can be set in front of the input end of the screw pump to ensure the continuity of production.

In some embodiments, the following steps are also included: a filter device may be added in front of the input end of the platen pump or plunger pump to filter the resin component, and filter out the large-diameter thermally conductive filler in the resin component to prevent It clogs the pipeline. Further, the filter device may be a filter screen.

In some embodiments, the method further includes the following steps: the heating pipeline of the resin component may be continuously heated to prevent the temperature decrease of the resin component during the transport, which may cause an increase in viscosity and a decrease in fluidity, which may cause blockage of the pipeline. Further, the heating method may be in the form of a heating tube or a sleeve. Further, the heating temperature may be equal to the preheating temperature of the resin component. Further, it is also possible to continuously heat the conveying pipe of the curing agent component.

In some embodiments, referring to FIG. 2, the preheated curing agent component is delivered before the input of the gear pump for metering. The viscosity of the curing agent component is relatively low, and it can be used in a variety of conveying forms. For example, like the resin component, it can be conveyed by a platen pump or a plunger pump, or it can be conveyed by a gear pump. Further, a buffer tank may be provided in front of the input end of the gear pump used for metering to ensure the continuity of production.

In some embodiments, referring to FIG. 2, the viscosity of the curing agent component is lower after heating, and dry compressed air may be used for pressure transportation. Compressed air is fed into the top of the heating tank of the curing agent component, the pressure in the sealed heating tank increases, and the curing agent component is transported through the pressure difference, which can save equipment and reduce the input cost of the equipment, as long as there is a compressed air pipeline That's it.

In some embodiments, referring to FIG. 2, the method further includes the following steps: directly filling the two-component glue output from the back end of the dynamic mixer, and the back end of the dynamic mixer is the filling head, for example, directly on the production line. Carry out the glue filling operation on the parts that need to be glued in the drive motor.

In some embodiments, referring to FIG. 2, the two-component glue is filled in a vacuum to reduce the probability that the two-component glue will enter the air to form bubbles during the filling process.

In some embodiments, referring to FIG. 2, the method further includes the following steps: after the glue filling is completed, the two-component glue is heated and cured to quickly characterize and improve production efficiency.

In some embodiments, referring to FIG. 2, the resin component may be degassed under vacuum conditions after preheating. It may be performed in the above-mentioned sealed heating device. The viscosity of the resin component after preheating is reduced, and the removal of air bubbles can be accelerated under vacuum conditions to improve production efficiency.

In some embodiments, the following steps are further included: before the resin component is transferred, the operation of fixing the resin component conveying pipeline may be performed to ensure that the resin component conveying pipeline is not bent, reducing the resin component conveying resistance and Prevent clogging. Further, before conveying the curing agent component, the operation of fixing the conveying pipeline of the curing agent component may also be performed.

Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

A high-viscosity two-component glue mixing method, characterized in that it includes the following steps:

Pre-heat treatment of resin components;

Degassing resin components;

Pre-heat treatment of curing agent components;

Use a screw pump to meter and deliver the preheated resin components to the dynamic mixer;

Use a gear pump to meter and deliver the preheated curing agent components to the dynamic mixer;

The resin component and the curing agent component are mixed into a two-component glue in a dynamic mixer;

The mixed two-component glue is output from the rear end of the dynamic mixer.
The method for mixing high-viscosity two-component glue according to claim 1, further comprising the following steps:

Use the pressure plate pump or plunger pump to transfer the preheated and degassed resin components to the input end of the screw pump;
The method for mixing high-viscosity two-component glue according to claim 2, further comprising the following steps:

Filter the resin component before using the platen pump or plunger pump to deliver the resin component;
The method for mixing high-viscosity two-component glue according to claim 2, further comprising the following steps:

Continuous heating of the resin component delivery pipeline.
The method for mixing high-viscosity two-component glue according to claim 1, further comprising the following steps:

Transfer the pre-heated curing agent component to the input end of the gear pump used for metering;
The method of mixing high-viscosity two-component glue according to claim 5, wherein dry compressed air is used to pressure-feed the preheated curing agent component.
The method for mixing high-viscosity two-component glue according to claim 1, further comprising the following steps:

Carry out product filling operation on the two-component glue output from the rear end of the dynamic mixer;
The method for mixing high-viscosity two-component glue according to claim 7, further comprising the following steps:

Heat the two-component glue after curing.
The method for mixing high-viscosity two-component glue according to claim 7, characterized in that the two-component glue is subjected to a glue filling operation under vacuum conditions.
The method for mixing a high-viscosity two-component glue according to claim 1, wherein after the resin component is preheated, the resin component is degassed under vacuum conditions.