CN110252610B - A solvent-saving automatic viscosity adjustment system - Google Patents

Abstract

The invention discloses an automatic viscosity regulating system capable of saving solvents, which comprises an impregnation viscosity regulating barrel and a presoaking viscosity regulating barrel, and is characterized in that a glue outlet of the impregnation viscosity regulating barrel is connected with a glue inlet of the presoaking viscosity regulating barrel through a glue return system; and the low-concentration glue in the impregnation viscosity-adjusting barrel is returned to the presoaked viscosity-adjusting barrel by a glue return system. The invention can return to the presoaking viscosity-regulating barrel through the impregnation viscosity-regulating glue, saves a pneumatic diaphragm pump and related matched compressed air pipelines during the process design, saves the consumption of viscosity-regulating solvent, and simultaneously ensures that the viscosity of the glue solution in the presoaking viscosity-regulating barrel is in a relatively stable state, thereby maintaining the product characteristics of high stability and high precision.

Description

A solvent-saving automatic viscosity adjustment system

Technical Field

The invention relates to the field of viscosity adjustment, and in particular to an automatic viscosity adjustment system for saving solvent.

Background technique

1 and 2 , the operating system of the prior art is divided into pre-preg viscosity adjustment 110 and impregnation viscosity adjustment 120 , and the viscosity control on both sides is inconsistent - the pre-preg viscosity is lower, and the impregnation viscosity is higher, and the pre-preg viscosity adjustment 110 and the impregnation viscosity adjustment 120 are adjusted separately and independently.

Because the friction between the two ends of the impregnation metering wheel (the length is greater than the width of the glass cloth) and the scraper is easy to produce black powder, the gluing machine is designed to use solvent dripping at both ends of the metering wheel. The solvent dripping causes the viscosity of the impregnation return glue to gradually decrease, resulting in the need to continuously adjust the viscosity of the impregnation (repeatedly adding new glue and solvent).

In addition, some factories use a solvent pre-wetting process, where the glass cloth takes the solvent from the solvent tank into the pre-preg tank 111, so that the viscosity in the pre-preg tank 111 will gradually decrease, and it is also necessary to add new glue and solvent to adjust the viscosity repeatedly. The solvent is wasted in the viscosity adjustment process.

Summary of the invention

In order to overcome the above-mentioned defects of the prior art, the object of the present invention is to provide an automatic viscosity adjustment system that saves solvents, and the technical solution adopted is:

A solvent-saving automatic viscosity adjustment system comprises an impregnation viscosity adjustment barrel and a pre-impregnation viscosity adjustment barrel, characterized in that a glue outlet of the impregnation viscosity adjustment barrel and a glue inlet of the pre-impregnation viscosity adjustment barrel are connected via a glue return system; low-concentration glue in the impregnation viscosity adjustment barrel is first returned to the pre-impregnation viscosity adjustment barrel by the glue return system.

In a preferred embodiment of the present invention, one end of the glue return system is connected to a glue outlet pipeline on the glue outlet of the impregnation and viscosity adjustment barrel through a manual three-way valve.

In a preferred embodiment of the present invention, the glue return pipeline on the impregnation and viscosity adjustment barrel is connected to the glue return system through a pneumatic three-way valve.

In a preferred embodiment of the present invention, the glue return system includes a first filter device, a glue impregnation tank, a second filter device and a glue return pump, and the first filter device, the glue impregnation tank, the second filter device and the glue return pump are connected in sequence through pipelines in the glue return system, wherein the glue inlet end of the pipeline in the glue return system is connected to the glue outlet pipeline on the glue outlet of the impregnation viscosity adjustment barrel through a manual three-way valve, and the glue outlet end of the pipeline in the glue return system is connected to the glue outlet of the prepreg viscosity adjustment barrel.

In a preferred embodiment of the present invention, the first filtering device and the second filtering device are both composed of two bag-type magnetic rod filters operating in parallel.

In a preferred embodiment of the present invention, the impregnation viscosity adjustment barrel, the pre-impregnation viscosity adjustment barrel and the impregnation glue tank are all provided with liquid level detectors.

The beneficial effects of the present invention are:

The present invention can return the adhesive to the pre-impregnation viscosity adjustment barrel through impregnation viscosity adjustment, which can save a pneumatic diaphragm pump and related supporting compressed air pipelines during process design, and save the consumption of viscosity adjustment solvent. At the same time, the viscosity of the adhesive in the pre-impregnation viscosity adjustment barrel can be kept in a relatively stable state, thereby maintaining high stability and high precision product characteristics.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram 1 of a viscosity adjustment system in the prior art.

FIG. 2 is a schematic diagram 2 of a viscosity adjustment system in the prior art.

FIG. 3 is a schematic diagram of a viscosity adjustment system of the present invention.

Detailed ways

As shown in FIGS. 1 and 2 , the prior art operating system is divided into pre-preg viscosity adjustment 110 and impregnation viscosity adjustment 120 , and the viscosity control on both sides is inconsistent—the pre-preg viscosity is lower, and the impregnation viscosity is higher. The pre-preg viscosity adjustment 110 and the impregnation viscosity adjustment 120 are adjusted independently on both sides.

Because the friction between the two ends of the impregnation metering wheel (the length is greater than the width of the glass cloth) and the scraper is easy to produce black powder, the gluing machine is designed to use solvent dripping at both ends of the metering wheel. The solvent dripping causes the viscosity of the impregnation return glue to gradually decrease, resulting in the need to continuously adjust the viscosity of the impregnation (repeatedly adding new glue and solvent).

Some factories also use solvent pre-wetting process, the glass cloth takes the solvent from the solvent tank into the pre-preg tank 111, so the viscosity in the pre-preg tank 110 will gradually decrease, and it is also necessary to add new glue and solvent to adjust the viscosity repeatedly. The solvent is wasted in the viscosity adjustment process.

In order to solve the above problems, the present invention provides the following technical solutions, referring to the solvent-saving viscosity adjustment system 200 in FIG. 3 , comprising:

The impregnation viscosity adjustment system 300 includes an impregnation viscosity adjustment barrel 310 with a liquid level detector 311 and a glue return pipeline 320. The glue return pipeline 320 is connected with a glue return system 400. The glue return system 400 includes a bag magnetic rod filter 341, an impregnation glue tank 330, a bag magnetic rod filter 342 and a glue return pump 343. A group of bag magnetic rod filters 341 and 342 connected in series are respectively connected to the inlet 331 and the outlet 332 of the impregnation glue tank 330. The inlet of the bag magnetic rod filter 341 and the outlet of the bag magnetic rod filter 342 are both connected to three-way valves 341a and 342a. The glue return system 400 is connected to the glue return pipeline 320 through the three-way valves 341a and 342a.

The pipe glue inlet end 401 in the glue return system 400 is connected to the glue outlet pipe 312a on the glue outlet 312 of the prepreg viscosity adjustment barrel 310 through a manual three-way valve 341a, and the pipe glue outlet end 402 in the glue return system 400 is connected to the glue outlet 412 of the prepreg viscosity adjustment barrel 410.

A prepreg viscosity adjustment barrel 410 and a prepreg adhesive tank 420 are provided with a liquid level detector 411; a three-way valve 431 and a group of bag-type magnetic rod filters 432 connected in series are connected between the outlet 412 of the prepreg viscosity adjustment barrel 410 and the inlet 421 of the prepreg adhesive tank 420; and a group of bag-type magnetic rod filters 433 connected in series are connected between the outlet 422 of the prepreg adhesive tank 420 and the inlet 411 of the prepreg viscosity adjustment barrel 410.

The liquid level detectors 311 and 411 are provided with three probes 311a, 311b and 311c and 411a, 411b and 411c with different depths.

Because of the above structure, the working principle of the present invention is:

First, glue is added into the impregnation viscosity adjustment barrel 310 and the pre-impregnation viscosity adjustment barrel 410 until the liquid level detectors 311 and 411 detect that the H liquid level 311a and 411a is reached and then glue feeding is stopped. At this time, automatic viscosity adjustment (adding solvent) is started, and the viscosity adjustment function of the impregnation viscosity adjustment barrel 310 or the pre-impregnation viscosity adjustment barrel 410 is turned on during the process.

Control according to the set viscosity (or density), adjust and test at the same time, and stop adding solvent when the viscosity value reaches the set range - that is, stop adjusting the viscosity.

The adhesive liquid having been adjusted in the impregnation adhesive adjustment barrel 310 and the pre-impregnation adhesive adjustment barrel 410 is respectively pumped into the impregnation adhesive tank 330 or the pre-impregnation adhesive tank 420 .

At the same time, the self-circulation of the impregnation viscosity adjustment barrel 310 and the impregnation glue tank 330 and the pre-impregnation viscosity adjustment barrel 410 and the pre-impregnation glue tank 420 is started (each viscosity adjustment barrel is transferred to the glue basin and then returned to the viscosity barrel), and the viscosity of the two impregnation viscosity adjustment barrels 310 and the pre-impregnation viscosity adjustment barrels 410 is controlled respectively.

Then turn on the gluing machine to start production. During the process, the viscosity of the glue will gradually decrease, and new glue needs to be repeatedly added to the viscosity adjustment barrel from the previous process to ensure the viscosity of the glue.

At this time, the three-way valve 342a on the return glue pipeline 320 is first opened to return the impregnated return glue to the pre-impregnation viscosity adjustment barrel 410 to ensure that the viscosity on both sides will not gradually decrease. At the same time, there is no need to repeatedly inject glue from the previous process into the impregnation viscosity adjustment barrel 310 or the pre-impregnation viscosity adjustment barrel 410. New glue is injected only when the impregnation viscosity adjustment barrel 310 or the pre-impregnation viscosity adjustment barrel 410 reaches the L liquid level 311b, 411b.

During the production process, when the prepreg viscosity adjustment barrel 410 reaches the HH liquid level 311c, 411c, the impregnated return glue of the impregnated viscosity adjustment barrel 310 is switched back to the glue pipeline 320 through the three-way valve 342a, and the glue processed by the impregnated glue tank 330 is normally returned to the impregnated viscosity adjustment barrel 310. When the liquid level of the prepreg viscosity adjustment barrel 410 is lower than the H liquid level 411a, the impregnated return glue of the impregnated viscosity adjustment barrel 310 is switched back to the prepreg viscosity adjustment barrel 410 to prevent the impregnated viscosity adjustment barrel 310 from overflowing due to full glue.

Because of the above structure and working principle, the present invention has the advantages that:

The low-viscosity glue produced by solvent dripping is first returned to the pre-impregnation viscosity adjustment barrel, which first ensures the stability of the viscosity of the glue in the impregnation viscosity adjustment barrel and reduces the frequency of impregnation viscosity adjustment;

Usually, the viscosity of the impregnation is set to be 10-20s higher than the viscosity of the pre-impregnation (measured by the viscosity cup when adding materials). Therefore, the low viscosity glue (generated by solvent dripping) of the impregnation is equivalent to or slightly higher than the viscosity of the pre-impregnation. Therefore, the glue is returned to the pre-impregnation viscosity adjustment barrel, and the glass cloth brings the solvent from the pre-impregnation process to basically stabilize the pre-impregnation viscosity. The pre-impregnation tank can almost be exempted from viscosity adjustment during the production process (except for the need when the first tank is started);

This improved process only requires one refill pump for pre-impregnation/refilling, which reduces the initial machine investment (including diaphragm pump and related compressed air pipelines, etc.).

Claims (5)

1. The automatic viscosity regulating system capable of saving the solvent comprises an impregnation viscosity regulating barrel and a presoaking viscosity regulating barrel, and is characterized in that a glue outlet of the impregnation viscosity regulating barrel is connected with a glue inlet of the presoaking viscosity regulating barrel through a glue return system; the low-concentration glue in the impregnation viscosity-adjusting barrel is returned to the presoaked viscosity-adjusting barrel by a glue return system; the impregnation viscosity regulating barrel and the presoaking viscosity regulating barrel and the impregnation tank are provided with liquid level detectors; the liquid level detector is provided with three probes with different depths.

2. The automatic viscosity-adjusting system for saving solvent according to claim 1, wherein one end of the glue return system is connected with a glue outlet pipeline on a glue outlet of the impregnation viscosity-adjusting barrel through a manual three-way valve.

3. The automatic viscosity-adjusting system for saving solvent according to claim 2, wherein a rubber return pipe on the impregnation viscosity-adjusting barrel is connected in the rubber return system through a pneumatic three-way valve.

4. The automatic solvent-saving viscosity-regulating system according to claim 3, wherein the glue return system comprises a first filtering device, an impregnation tank, a second filtering device and a glue return pump, wherein the first filtering device, the impregnation tank, the second filtering device and the glue return pump are sequentially connected through pipelines in the glue return system, a glue inlet end of the pipeline in the glue return system is connected with a glue outlet pipeline on a glue outlet of the impregnation viscosity-regulating barrel through a manual three-way valve, and a glue outlet end of the pipeline in the glue return system is connected with a glue outlet of the presoaked viscosity-regulating barrel.

5. The automatic viscosity-regulating system for saving solvent according to claim 4, wherein the first filtering device and the second filtering device are composed of two bag-type magnetic rod filters which are operated in parallel.