CN201596602U - Two-component adhesive mixing device - Google Patents

Abstract

The utility model discloses a two-component adhesive mixing device, which comprises two screw pumps and a flow control device, the screw pumps are respectively driven by a motor, and the suction end of the screw pump is connected to a glue supply device, an output The end is connected to the static mixer through a pipeline; the flow control device includes two flow sensors and a controller, and the flow sensors are respectively arranged on the pipelines for detecting the flow of each pipeline and outputting a detection signal. The controller is used for receiving the detection signal of the flow sensor, and controlling the rotation speed of the motor according to the detection signal. Compared with the prior art, the rubber mixing device of the utility model adopts a screw pump, which can ensure stable glue delivery without pressure fluctuations, and has high glue mixing efficiency and large delivery flow, while the flow control device can ensure a higher Proportioning accuracy. Experiments show that the rubber mixing device of the present utility model has a conveying ratio accuracy of ±1%, and a conveying speed greater than 10 liters/minute.

Description

Two-component adhesive mixing device

technical field

The utility model relates to a rubber mixing device, in particular to a rubber mixing device for mixing two-component adhesives.

Background technique

Due to the increasing automation and precision requirements of modern production, especially adhesives used in industries such as automobiles, machinery, electronics, and composite materials, technical indicators such as high strength, high rhythm, fast curing, and three-dimensional operation need to be achieved. In order to meet the practical application of these productions, the adhesive industry has developed suitable two-component adhesives, including two-component epoxy, polyurethane, and acrylic adhesives. Some common features of these adhesives are two-component, high Viscosity, high thixotropy, high strength, etc. Due to these characteristics of the adhesive, higher requirements are put forward for the two-component glue mixer, which needs to have the characteristics of high-pressure conveying, accurate proportion, uniform mixing, and fast conveying speed. In addition, with the improvement of modern production automation, the rubber mixer is also required to ensure the continuous output of the mixed glue and a large output flow.

At present, there are two common types of two-component adhesive mixers: one is a double-platen glue mixer, which uses an air pump as the power to drive the platen lifting device separately so that the two platens are placed in two glue containers. Move down, so that the two kinds of glue are respectively output to the glue mixer through the adjusting mechanism to mix the glue and then squeezed out from the glue gun. The proportioning mechanism of this kind of rubber mixer usually adopts a plunger pump, but because the pressure fluctuation will occur when the plunger pump reciprocates, it will cause discontinuous output of the glue solution, which will cause the mixing ratio to be out of balance. Can not achieve the output according to the rated ratio. In addition, the output flow of this kind of rubber mixer is also low, so it is not suitable for occasions with large output flow.

Utility model content

In view of this, the technical problem to be solved by the utility model is to provide a two-component adhesive mixing device with simple structure, accurate and continuous glue output ratio, and large output flow.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A two-component adhesive mixing device, which includes:

Two screw pumps are respectively driven by a motor, and the suction end of the screw pump is connected to the glue supply device, and the output end is connected to the static mixer through a pipeline; and

A flow control device, the flow control device comprising:

Two flow sensors are respectively arranged on the pipelines for detecting the flow of each pipeline and outputting detection signals, and

a controller for receiving the detection signal of the flow sensor and controlling the flow rate according to the detection signal

The motor speed.

Preferably, the controller includes a frequency converter, and the controller controls the frequency converter to provide a variable frequency signal to the motor according to the detection signal.

Preferably, the glue supply device is a glue bucket, and the glue bucket is placed above the screw pump.

Preferably, the suction end of the screw pump is arranged above the screw pump.

Preferably, the flow sensor is a gear flow sensor.

Preferably, the static mixer includes a polytetrafluoroethylene inner tube and a metal outer tube, and a plurality of sections of polytetrafluoroethylene helical sections are fixed at intervals in the polytetrafluoroethylene inner tube, and between each helical section and the polytetrafluoroethylene inner tube Two spiral inner holes are formed, and the metal outer tube is sleeved on the outside of the polytetrafluoroethylene inner tube.

The glue mixing device of the utility model is connected to the suction end of the screw pump at the outlet of the glue supply device. The glue gun is applied to the gluing site. The flow sensor installed on the pipeline between the screw pump and the static mixer can detect the flow rate and send the detection signal to the controller. In the controller, it is compared with the set flow value. The controller sends a control signal, and the frequency converter outputs a corresponding frequency conversion signal to control the motor to speed up or decelerate, so as to realize real-time flow control.

Compared with the prior art, the rubber mixing device of the utility model adopts a screw pump, which can ensure stable glue delivery without pressure fluctuations, and has high glue mixing efficiency and large delivery flow, while the flow control device can ensure a higher Proportioning accuracy. Experiments show that the rubber mixing device of the present utility model has a conveying ratio accuracy of ±1%, and a conveying speed greater than 10 liters/minute.

The glue liquid supply device of the utility model adopts a glue barrel, and the glue barrel is arranged above the screw pump to use gravity to supply glue, which can have a relatively good glue supply effect, and its structure is relatively simple; and the suction end of the screw pump is provided Above the screw pump, it is convenient for the glue liquid to enter the screw pump and improve the glue supply effect. The static mixer adopts a polytetrafluoroethylene tube with multi-segment spiral sections, which can make the two kinds of glue advance spirally in each spiral section and mix between the spiral sections. After multi-stage mixing, the glue solution can be mixed more evenly , At the same time, it has good corrosion resistance and high service life. The metal outer tube outside the inner tube can effectively improve the pressure resistance of the static mixer.

The glue mixing device of the utility model is especially suitable for the glue mixing of epoxy, polyurethane, acrylic and other two-component adhesives.

Description of drawings

Fig. 1 is the front view of the two-component adhesive mixing device of the present invention.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a schematic diagram of the connection structure of the rubber mixing device shown in Fig. 1 and Fig. 2 .

Figure 4 is a schematic diagram of the structure of a static mixer.

FIG. 5 is an axial view of the helicoid in FIG. 3 .

in the picture

1, 1', screw pump 2, 2', motor

3, 3’, flow sensor 4, control cabinet

5. Static mixer 51. PTFE inner tube

52. Metal outer tube 53. Spiral joint

6. Pipeline 7. Rack

8. Control panel 11, 11' suction side

12, 12' output

Detailed ways

The utility model is described in detail below in conjunction with accompanying drawings and specific embodiments.

Referring to Fig. 1, Fig. 2 and Fig. 3, the two-component adhesive glue mixing device of the present utility model, it comprises: two screw pumps 1,1 ' and flow control device.

As shown in Figure 1 and Figure 2, the two screw pumps 1, 1' are installed on the frame 7, and are respectively driven by motors 2, 2', and the suction ends 11, 11' of the screw pumps are connected to the glue The liquid supply device, the output ports 12, 12' of the screw pump are connected to the static mixer 5 through the pipeline 6. In this embodiment, the glue supply device is a glue barrel (not shown in the figure), and the screw pump 1, 1' pumps out the glue in the glue barrel by negative pressure.

The flow control device includes: flow sensors 3, 3' and a controller, see Fig. 3 .

The two flow sensors 3, 3' are respectively arranged on the pipeline 6 between the output end of the screw pump and the static mixer 5, and are used to detect the flow of each pipeline and output detection signals.

The controller is installed in the control cabinet 4, and is used to receive the detection signals of the flow sensors 3, 3', and respectively control the speeds of the motors 2, 2' according to the detection signals, so as to control the output flow of the two glues , so that the output flow of the two kinds of glue satisfies the preset ratio. The ratio of the output glue controlled by the controller is preset by the control panel 8 .

The controller may preferably include a frequency converter, and the controller controls the frequency converter to provide frequency conversion signals to the motors 2, 2' according to the detection signal. That is, after receiving the detection signal, the controller controls the frequency converter to provide precise frequency conversion signals to the motors 2, 2' according to the detection signal after accurate calculation to realize real-time flow control.

Preferably, the glue barrels are all placed above the screw pumps 1, 1', the glue can flow into the suction end of the screw pump by its own weight, which can reduce the steps of removing air.

Preferably, the suction end of the screw pump is arranged above the screw pump 1, 1'.

The flow sensor can be a gear-type flow sensor, such as the German KEM flow meter, which is not described in detail here because it is a standard component.

Fig. 4 is a schematic structural view of the aforementioned static mixer. FIG. 5 is an axial view of the helicoid in FIG. 4 .

As shown in Fig. 4 and Fig. 5, the static mixer 5 includes a polytetrafluoroethylene inner tube 51 and a metal outer tube 52, and a plurality of sections of polytetrafluoroethylene helical joints 53 are fixed at intervals in the polytetrafluoroethylene inner tube 51, Two helical inner holes are formed between each spiral segment 53 and the polytetrafluoroethylene inner tube 51, and the metal outer tube 52 is sleeved on the outside of the polytetrafluoroethylene inner tube. When the two kinds of glue are supplied to the static mixer 5, they spirally advance in each helical section 53, and mix at intervals between the helical sections 53, which is equivalent to mixing the two glues with constant stirring, so After multi-stage mixing, it can ensure that the glue is mixed more evenly. And the screw joint and inner pipe that polytetrafluoroethylene is made can guarantee that static mixer 5 has good corrosion resistance and higher service life, and inner pipe 51 outer sleeve metal outer pipe 52 can effectively improve static mixer. 5 pressure resistance.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, and the The above-mentioned technical content is combined to form other technical solutions, and these improvements and modifications, as well as other technical solutions formed, should also be regarded as the protection scope of the present utility model.

Claims (6)

1. A two-component adhesive mixing device, characterized in that it comprises: Two screw pumps are respectively driven by a motor, and the suction end of the screw pump is connected to the glue supply device, and the output end is connected to the static mixer through a pipeline; and A flow control device, the flow control device comprising: Two flow sensors are respectively arranged on the pipelines for detecting the flow of each pipeline and outputting detection signals, and The controller is used to receive the detection signal of the flow sensor, and control the rotation speed of the motor according to the detection signal. 2 . The two-component adhesive mixing device according to claim 1 , wherein the controller includes a frequency converter, and the controller controls the frequency converter to provide frequency conversion signals to the motor according to the detection signal. 3. The two-component adhesive mixing device according to claim 1 or 2, characterized in that: the glue liquid supply device is a glue bucket, and the glue bucket is placed above the screw pump. 4. The two-component adhesive mixing device according to claim 3, characterized in that: the suction end of the screw pump is arranged above the screw pump. 5. The two-component adhesive mixing device according to claim 1, characterized in that: the flow sensor is a gear type flow sensor. 6. The two-component adhesive mixing device according to claim 1, characterized in that: the static mixer includes a polytetrafluoroethylene inner tube and a metal outer tube, and a plurality of sections of polytetrafluoroethylene are fixed at intervals in the polytetrafluoroethylene inner tube. Teflon helical segments, two helical inner holes are formed between each helical segment and the polytetrafluoroethylene inner tube, and the metal outer tube is sleeved on the outer side of the polytetrafluoroethylene inner tube.

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