阅读说明：本技术 一种断胶装置和点胶阀 (Glue breaking device and glue dispensing valve ) 是由 莫谊胜 黄知超 田文静 王天祥 何孟高 岑国源 张彤 于 2019-12-19 设计创作，主要内容包括：本发明属于点胶领域,尤其涉及一种断胶装置和点胶阀,其特征为包括活塞以及与活塞配套的缸体,活塞与缸体后端的底壁之间设有弹性件,底壁设有注胶通孔,缸体前端的顶壁设有胶水入口,缸体前部的侧壁设有胶水出口,活塞在弹性件作用下处在缸体的前部并隔断胶水入口与胶水出口的连通,活塞与缸体后端的底壁之间的空间为回流室,回流室通过外置的回流管道与所述胶水出口始终连通,回流管道与点胶阀点胶口连通；本发明提供的点胶阀,其内安装有上述断胶装置,该点胶阀相对现有点胶阀防滴漏和拉丝效果更好。(The invention belongs to the field of glue dispensing, and particularly relates to a glue breaking device and a glue dispensing valve, which are characterized by comprising a piston and a cylinder body matched with the piston, wherein an elastic piece is arranged between the piston and the bottom wall at the rear end of the cylinder body, a glue injection through hole is formed in the bottom wall, a glue inlet is formed in the top wall at the front end of the cylinder body, a glue outlet is formed in the side wall at the front part of the cylinder body, the piston is positioned at the front part of the cylinder body under the action of the elastic piece and used for blocking the communication between the glue inlet and the glue outlet, a space between the piston and the bottom wall at the rear end of the cylinder body is a backflow chamber, the backflow chamber is; the glue dispensing valve provided by the invention is internally provided with the glue breaking device, and compared with the existing glue dispensing valve, the glue dispensing valve has better drip-proof and wire drawing effects.)

1. A glue breaking device is characterized by comprising a piston and a cylinder body matched with the piston, wherein an elastic piece is arranged between the piston and the bottom wall at the rear end of the cylinder body, the bottom wall is provided with a glue injection through hole, the top wall at the front end of the cylinder body is provided with a glue inlet, the side wall at the front part of the cylinder body is provided with a glue outlet, the piston is positioned at the front part of the cylinder body under the action of the elastic piece and cuts off the communication between the glue inlet and the glue outlet, a space between the piston and the bottom wall at the rear end of the cylinder body is a backflow chamber, the backflow chamber is always communicated with the glue outlet through an external backflow pipeline; when the piston is in work, the glue injection through hole is closed, the backflow chamber and the backflow pipeline are filled with glue all the time, and the piston moves towards the rear part of the cylinder body under the pressure of the glue entering from the glue inlet, so that the glue inlet is communicated with the glue outlet.

2. The glue breaking device according to claim 1, wherein the glue injection through holes are bolt holes, and the glue injection through holes are closed by bolts during operation.

3. The glue breaking device according to claim 1, wherein the glue injection through hole is communicated with a glue inlet pipeline of the glue dispensing valve through an electromagnetic valve.

4. A dispensing valve characterized in that any of the glue-breaking devices of claims 1-3 is installed therein.

Technical Field

The invention belongs to the field of glue dispensing, and particularly relates to a glue breaking device and a glue dispensing valve.

Background

Dispensing valves are generally classified into contact dispensing valves and non-contact dispensing valves. The non-contact dispensing valve is generally pneumatically driven during operation, namely compressed air presses glue into a feeding chamber at the lower end of a valve rod along a glue inlet pipeline, the glue enters the feeding chamber when the valve rod moves upwards, and the glue is extruded from a dispensing opening along a glue outlet pipeline when the valve rod moves downwards. Be equipped with disconnected mucilage binding in going out gluey pipeline and put, prevent that the mouth from leaking and the wire drawing phenomenon from appearing in the point, current disconnected mucilage binding is put the structure complicacy, and the effect is general.

Disclosure of Invention

The invention aims to provide a glue breaking device and a glue dispensing valve which are simple in structure and good in glue breaking effect.

The technical scheme of the invention is realized as follows: the utility model provides a glue breaking device, includes the piston and with the supporting cylinder body of piston, is equipped with the elastic component between the diapire of piston and cylinder body rear end, and the diapire is equipped with the injecting glue through-hole, and the roof of cylinder body front end is equipped with the glue entry, and the anterior lateral wall of cylinder body is equipped with the glue export, and the piston is in the front portion of cylinder body and cuts off the intercommunication of glue entry and glue export under the elastic component effect, and the space between the diapire of piston and cylinder body rear end is the backward flow room, the backward flow room through external backflow pipeline with the glue export communicates all the time, and backflow pipeline and the point of dispensing valve are glued. When in work, the glue injection through hole is closed, the backflow chamber and the backflow pipeline are always filled with glue, the piston moves towards the rear part of the cylinder body under the pressure of the glue entering from the glue inlet, so that the glue inlet is communicated with the glue outlet,

further, the glue injection through holes are bolt holes, and the glue injection through holes are sealed by bolts during operation.

Or the glue injection through hole is communicated with a glue inlet pipeline of the glue dispensing valve through an electromagnetic valve.

When the piston valve rod moves downwards, the glue in the glue outlet pipeline enters the cylinder body from a glue inlet of the cylinder body, the glue pushes the piston to move towards the bottom wall by overcoming the elastic force of the elastic piece, the space of the backflow chamber is reduced, the glue flows into the backflow pipeline and is discharged from the glue dispensing opening, when the glue inlet and the glue outlet are communicated in the cylinder body, the glue starts to be discharged from the glue outlet into the backflow pipeline and is discharged from the glue dispensing opening, the amount of glue discharged from the backflow chamber to the glue dispensing opening is gradually reduced, when the pressure applied to the piston is balanced with the elastic force of the elastic piece, the piston stops moving towards the rear end, the backflow chamber stops discharging glue to the glue dispensing opening, all the glue at the glue dispensing opening is supplied by the glue outlet, and the piston valve rod continues to move downwards until the glue dispensing opening discharges the specified amount of glue; the piston valve rod moves upwards, the glue in the glue outlet pipeline forms negative pressure, the glue in the return pipeline flows to the space of the cylinder body in front of and behind the piston and is sucked back by the glue at the glue dispensing port communicated with the return pipeline, dripping and wire drawing are effectively prevented, and the piston moves towards the top wall of the cylinder body under the action of the restoring force of the elastic part and the negative pressure of the glue until reaching the top wall.

It should be noted that, according to the glue water clock wire drawing condition, can increase the distance of glue export and cylinder body roof in the design in order to increase the resorption volume when the piston resets.

The invention provides a dispensing valve, which is internally provided with the glue breaking device and has better anti-leakage and wire drawing effects compared with the existing dispensing valve.

Drawings

FIG. 1 is a schematic structural view of a glue breaking device of a dispensing valve;

FIG. 2 is a schematic view of the working state of the glue breaking device;

fig. 3 is a schematic structural view of a glue breaking device of a glue dispensing valve according to another embodiment of the invention.

In the figure, 1, a piston; 2. a cylinder body; 2-1, a glue inlet; 2-2, a glue outlet; 2-3, an elastic member; 2-4, a reflux chamber; 2-5, injecting glue through holes; 3. a return line; 4. a glue outlet pipeline; 5. dispensing a glue port; 6. a bolt; 7. a glue inlet pipeline; 8. an electromagnetic valve. The hollow arrow is the moving direction of the piston, the black arrow is the flowing direction of the glue, the left graph of the figure 2 shows the working schematic diagram of the glue breaking device when the valve rod moves downwards, and the right graph shows the working schematic diagram of the glue breaking device when the valve rod moves upwards.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments, which can be obtained by those skilled in the art without any creative effort, based on the embodiments of the present invention, belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the glue breaking device comprises a piston 1 and a cylinder body 2 matched with the piston 1, an elastic part 2-3 is arranged between the piston 1 and the bottom wall at the rear end of the cylinder body 2, a glue injection through hole 2-5 is arranged on the bottom wall, a glue inlet 2-1 is arranged on the top wall at the front end of the cylinder body 2, a glue outlet 2-2 is arranged on the side wall at the front part of the cylinder body 2, the piston 1 is positioned at the front part of the cylinder body 2 under the action of the elastic part 2-3 and cuts off the communication between the glue inlet 2-1 and the glue outlet 2-2, a space between the piston 1 and the bottom wall at the rear end of the cylinder body 2 is a backflow chamber 2-4, the backflow chamber 2-4 is always communicated with the glue outlet 2-2 through an external backflow pipeline 3, and the backflow. When in work, the glue injection through hole 2-5 is closed, the backflow chamber 2-4 and the backflow pipeline 3 are always filled with glue, the piston 1 moves to the rear part of the cylinder body 2 under the pressure of the glue entering from the glue inlet 2-1, so that the glue inlet 2-1 is communicated with the glue outlet 2-2,

the glue injection through holes 2-5 are sealed by the bolts 6 when in work,

when the valve rod moves downwards, referring to the left part of figure 2, the glue in the glue outlet pipeline 4 enters the cylinder body 2 from the glue inlet 2-1 of the cylinder body 2, the glue pushes the piston 1 to move towards the bottom wall by overcoming the elasticity of the elastic piece 2-3, the space of the backflow chamber 2-4 is reduced, the glue in the backflow chamber 2-4 flows into the backflow pipeline 3 and is discharged from the glue dispensing opening 5, the glue inlet 2-1 and the glue outlet 2-2 are communicated in the cylinder body 2, the glue starts to be discharged from the glue outlet 2-2, enters the backflow pipeline 3 and is discharged from the glue dispensing opening 5, the glue discharge amount from the backflow chamber 2-4 to the glue dispensing opening 5 is gradually reduced, when the pressure applied to the piston 1 is balanced with the elasticity of the elastic piece, the piston 1 stops moving towards the rear end, the backflow chamber 2-4 stops discharging glue to the glue dispensing opening 5, glue in the glue dispensing opening 5 is completely supplied by the glue outlet 2-2, and the valve rod continues to move downwards until the glue dispensing opening 5 discharges the specified glue amount; the valve rod moves upwards, the glue in the glue outlet pipeline 4 forms negative pressure, the glue in the return pipeline 3 flows into the spaces of the cylinder body 2 in front of and behind the piston 1, the glue at the glue dispensing port 5 communicated with the return pipeline 3 is sucked back, dripping and wire drawing are effectively prevented, and the piston 1 moves towards the top wall of the cylinder body 2 under the action of the restoring force of the elastic part 2-3 and the glue negative pressure until reaching the top wall.

FIG. 1 is a partial diagram of a dispensing valve, in which the glue-breaking device is installed, a glue inlet 2-1 of the glue-breaking device is communicated with a glue outlet pipe 4, and a glue outlet 2-2 of the glue-breaking device is communicated with a dispensing opening 5 of the dispensing valve. This point gum valve is more better than current point gum valve antidrip and wire drawing effect.

Fig. 3 shows another embodiment of the present invention, in which the glue injection through holes 2-5 of the glue breaking device are communicated with the glue inlet conduit 7 of the glue dispensing valve through an electromagnetic valve 8, the electromagnetic valve 8 controls the opening and closing of the glue injection through holes, and other structures are the same as those shown in fig. 1; the glue-breaking device is convenient and quick to glue injection of the glue-breaking device shown in figure 1.