CN113134460A

CN113134460A - PVDC emulsion feeding device based on PVDC coating process

Info

Publication number: CN113134460A
Application number: CN202110405167.6A
Authority: CN
Inventors: 沈永亮; 刘晓虎; 孙灿炬
Original assignee: Hangzhou Plastics Industrial Co ltd
Current assignee: Hangzhou Plastics Industrial Co ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2021-07-20

Abstract

The invention discloses a PVDC emulsion supply device based on a PVDC coating process, which is used for the circulating flow of PVDC emulsion and comprises a coating groove body, wherein the side wall of the coating groove body is provided with a liquid inlet which is communicated with an accommodating cavity in the coating groove body, the side wall of the coating groove body is provided with a liquid outlet, the horizontal height of the liquid outlet is higher than that of a liquid inlet hole, a liquid outlet pipe is inserted in the liquid outlet, a buffer box body is arranged below the coating groove body, the top of the buffer box body is fixedly provided with a diaphragm pump, the input end of the diaphragm pump is communicated with the inside of the buffer box body through a pipe body, and the output end of the diaphragm pump is communicated with the accommodating cavity of the coating groove body through a pipe body fixedly connected to the liquid inlet on the outer wall of the coating groove body. The PVDC emulsion supply device based on the PVDC coating process can keep the emulsion liquid level in the coating tank stable, thereby ensuring the uniformity and consistency of the PVDC coating amount and improving the production efficiency and the coating quality.

Description

PVDC emulsion feeding device based on PVDC coating process

Technical Field

The invention relates to the field of composite packaging material production devices, in particular to a PVDC emulsion supply device based on a PVDC coating process.

Background

PVDC, known under the chemical name "polyvinylidene chloride", is a thermoplastic polymer with a softening temperature of 160 ℃ and 200 ℃ and has a head-to-tail linear polymeric chain structure. The molecular structure is symmetrical, and the crystallinity is high. In the PVDC, due to strong intermolecular cohesive force and high crystallinity, chlorine atoms in PVDC molecules have hydrophobicity and do not form hydrogen bonds, oxygen molecules and water molecules are difficult to move in the PVDC molecules, so that the PVDC has excellent oxygen resistance and moisture resistance, and the oxygen resistance is not influenced by the humidity of the surrounding environment. That is, the plastic packaging material has excellent capability of blocking water vapor, oxygen, smell and fragrance under any temperature or humidity condition, and is the plastic packaging material which is generally recognized to have the best combination of barrier property.

At present, the PVDC emulsion is generally coated by adopting an anilox roller concave plate, a coating roller rotates to drive the PVDC emulsion, and the PVDC transfer amount is adjusted by adjusting the gap of a scraper. In order to ensure the coating uniformity, the soaking degree of the coating roller in the PVDC emulsion must be always kept consistent, but in the coating process, the material in the PVDC trough is gradually reduced, and the soaking degree of the coating roller in the PVDC emulsion has certain variation, so that the coating is not uniform, and the product quality is influenced. Because the PVDC coating product is a medicine inner packaging material, the requirement on quality is extremely strict, the shelf life of the medicine is seriously influenced by non-uniform coating amount, and in addition, the user of the medicine is a patient and has serious hidden trouble. The traditional solution is that the PVDC emulsion in the trough is manually observed to be in liquid level, and when the liquid level is obviously reduced, the PVDC emulsion is replenished. However, because production is continuously carried out for a long time, the trough is often lack of materials by manual observation and manual supply, and the coating roller cannot soak the materials.

Disclosure of Invention

The invention aims to provide a PVDC emulsion supply device based on a PVDC coating process, which can ensure that the emulsion liquid level in a coating tank is consistent, thereby ensuring that the coating amount of PVDC is uniform.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a PVDC emulsion feeding device based on PVDC coating process for PVDC emulsion's circulation flows, includes the coating cell body, seted up the inlet on the coating cell body lateral wall, the inlet communicates with each other with the inside chamber that holds of coating cell body, has seted up the leakage fluid dram on the lateral wall of coating cell body, and the level of leakage fluid dram is higher than the level of inlet, the grafting of leakage fluid dram department has the fluid-discharge tube, the below of coating cell body is provided with the surge tank body to supply to get into the surge tank body along the PVDC emulsion that the fluid-discharge tube flows, the top fixed mounting of surge tank body has the diaphragm pump, the input of diaphragm pump passes through the inside intercommunication of body with the surge tank body, and the output of diaphragm pump passes through the body of fixed connection on coating cell body outer wall inlet and holds the chamber intercommunication with the coating cell body, in order to supply the coating cell body that PVDC emulsion got into to hold the intracavity.

Preferably, one side top that the coating cell body was kept away from to the buffer tank body is provided with the liquid reserve tank, and the storage has the PVDC emulsion of equivalent in the liquid reserve tank, the inside bottom side of liquid reserve tank is through the inside intercommunication of body and buffer tank body, and when the emulsion flow of backward flow was less than the synchronous supply's of diaphragm pump in the buffer tank body, it was internal to supply to the buffer tank through the PVDC emulsion in the liquid reserve tank.

Preferably, the fluid infusion mouth has been seted up at the top of buffer box, and the inside of buffer box is provided with the buoyancy valve that is located directly below the fluid infusion mouth, and the buoyancy valve is used for the liquid level in the control buffer box, and when the liquid level descends, the buoyancy valve is opened, and the emulsion in the liquid storage tank supplyes and flows into to the buffer box for the emulsion liquid level in the buffer box promotes gradually, and the buoyancy valve follows the promotion of liquid level and closes the fluid infusion mouth gradually simultaneously, stops the fluid infusion process, in order to realize the dynamic balance of the interior liquid level of buffer box and adjust.

Preferably, the lower part of the coating tank body is provided with a buffer tank body positioned below the liquid discharge pipe, and the inside of the buffer tank body is communicated with the inside of the buffer tank body through a pipe body so that PVDC emulsion flowing out along the liquid discharge pipe flows through the buffer tank body and then enters the buffer tank body.

Preferably, the liquid storage tank is arranged on a support frame, so that the liquid storage tank is positioned above the buffer tank body.

Preferably, still include the ladder support, the ladder support includes the top bearing surface, and the outer terminal surface of the diapire of coating cell body is arranged in on the top bearing surface of ladder support.

Preferably, the stepped support further comprises a secondary top end bearing surface arranged in parallel with the top end bearing surface, and the buffer groove body is arranged on the secondary top end bearing surface of the stepped support.

Preferably, the top end bearing surface and the secondary top end bearing surface are in transitional connection through a connecting plate to form a stepped structure, and the front section supporting leg and the rear section supporting leg are correspondingly arranged on the top end bearing surface and the lower part of the secondary top end bearing surface.

Compared with the prior art, the invention has the following beneficial effects: the PVDC emulsion supply device based on the PVDC coating process is simple and durable, easy to clean and easy to disassemble, and the emulsion liquid level in the coating tank is kept stable by arranging the buffer tank body and the diaphragm pump and continuously feeding the coating tank body by the diaphragm pump, so that the coating amount of the PVDC is uniform, and the production efficiency and the coating quality are improved.

Drawings

FIG. 1 is a schematic perspective view of a PVDC emulsion supply device according to the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic perspective view of a coating tank according to the present invention;

fig. 4 is a schematic sectional view of the coating tank of the present invention.

In the figure: the device comprises a step support 1, a top end bearing surface 11, a top end bearing surface 12 times, a connecting plate 13, a front section supporting foot 111, a rear section supporting foot 121, a coating groove body 2, an annular cavity 21, a liquid inlet hole 22, a liquid inlet 23, a liquid outlet 24, a bottom wall 201, a side wall 202, a buffer box body 3, a diaphragm pump 4, a liquid outlet pipe 5, a buffer groove body 6, a liquid storage tank 7, a buoyancy valve 8 and a support frame 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 4, a PVDC emulsion supply device based on PVDC coating process for circulating PVDC emulsion includes a step support 1, a coating tank 2 fixed on top of the step support 1, the coating tank 2 is located at the coating position of the PVDC coating device, and the PVDC emulsion is contained in the coating tank.

The ladder support 1 includes a top end bearing surface 11 and a sub-top end bearing surface 12 arranged in parallel with the top end bearing surface 11, the top end bearing surface 11 and the sub-top end bearing surface 12 are transitionally connected through a connecting plate 13 to form a ladder-shaped structure, and a front section supporting leg 111 and a rear section supporting leg 121 are correspondingly arranged on the bottom of the top end bearing surface 11 and the sub-top end bearing surface 12.

The coating tank 2 includes a bottom wall 201 and a side wall 202 formed on the outer periphery of the bottom wall 201, and a receiving cavity is formed between the bottom wall 201 and the side wall 202 for receiving the PVDC emulsion and coating the film substrate.

The outer end surface of the bottom wall 201 of the coating tank body 2 is arranged on the top end bearing surface 11 of the stepped support 1, as shown in fig. 3 and 4, an annular cavity 21 is arranged in the side wall 202 around the coating tank body 2, a plurality of liquid inlet holes 22 communicated with the annular cavity 21 are formed in the inner side of the side wall 202 of the coating tank body 2, a liquid inlet 23 communicated with the annular cavity 21 is formed in the side wall 202 of the coating tank body 2, externally supplied emulsion enters the annular cavity 21 through the liquid inlet 23 and dispersedly and synchronously flows into the accommodating cavity of the coating tank body 2 through the plurality of liquid inlet holes 22 distributed in the inner side of the side wall 202 around, so that the balance of PVDC emulsion components is ensured by means of fountain turbulence, meanwhile, the stability of the liquid level of the PVDC emulsion in the coating tank body 2 is ensured, and the coating amount of the PVDC is ensured to be uniform and consistent.

Preferably, the liquid inlet holes 22 are uniformly distributed on the inner side of the peripheral side wall 202 of the coating tank body 2, specifically, the liquid inlet holes 22 are designed in an upper row and a lower row, and the liquid inlet holes 22 in each row are designed in a left-right equidistant manner, so that the power of each direction is mutually offset under the action of the fluid power of the emulsions simultaneously converged from four directions in the coating tank body 2, and a relatively stable liquid supply process is formed.

One side below of coating cell body 2 is provided with buffer tank 3, and buffer tank 3's top fixed mounting has diaphragm pump 4, and the input of diaphragm pump 4 passes through body and buffer tank 3's inside intercommunication, the output passes through body and the annular cavity 21 intercommunication on inlet 23 of fixed connection in the lateral wall 202 outside of coating cell body 2. Can send into the toroidal cavity 21 in succession with the emulsion that stores in the surge tank 3 through diaphragm pump 4 to through a plurality of feed liquor holes 22 of lateral wall 202 inboard all around in the chamber that holds of coating cell body 2 flows in dispersedly in step, rely on the fountain turbulent flow mode like this to guarantee the equilibrium of PVDC emulsion composition, guarantee the stationarity of PVDC emulsion liquid level in the chamber that holds of coating cell body 2 simultaneously, thereby guarantee that PVDC coating weight is even unanimous and realize the continuous supply of PVDC emulsion in the coating cell body 2.

A liquid discharge pipe 5 penetrating through the annular cavity 21 is inserted into the side wall of the coating tank body 2, specifically, liquid discharge ports 24 communicated with the annular cavity 21 are correspondingly formed on the inner side and the outer side of the side wall 202 of the coating tank body 2, and the horizontal height of the liquid discharge ports 24 is higher than that of the liquid inlet 23. The liquid discharge pipe 5 is positioned in the liquid discharge port 24, and the outer wall of the liquid discharge pipe 5 is hermetically connected with the edge of the liquid discharge port 24 through sealant. When the liquid level of the PVDC emulsion in the coating tank body 2 exceeds the lowest end of the liquid discharge pipe 5, the emulsion naturally overflows to the outside of the coating tank body 2 through the liquid discharge pipe 5, and the dynamic stability of the liquid level of the emulsion in the coating tank body 2 can be maintained through the continuous supply of the diaphragm pump 4 and the continuous overflow of the liquid discharge pipe 5.

Preferably, the liquid outlet 24 is located above the liquid inlet hole 22, and the height of the liquid inlet hole 22 is not greater than two thirds of the depth height of the coating tank body 2, so that the supply and discharge of the emulsion are respectively located in flow layers with different heights, the circulation convection is formed inside the emulsion in the coating tank body 2, and the balance of the PVDC emulsion components is ensured.

One end of the liquid discharge pipe 5 is communicated with the inside of the coating tank body 2, and the other end is positioned outside the outer wall of the coating tank body 2. The lower part of the coating tank body 2 is provided with a buffer tank body 6 positioned below the liquid discharge pipe 5, and the buffer tank body 6 is fixedly arranged on a secondary top bearing surface 12 of the stepped support 1. The inside of buffer tank body 6 is through the inside intercommunication of body with buffer tank 3, then flows into buffer tank body 6 by the emulsion that fluid-discharge tube 5 spilled over, and then flows back buffer tank 3 again through the body in, prevents that PVDC emulsion from splashing, so formed the dynamic circulation of PVDC emulsion, the waste of reduction PVDC emulsion that can furthest.

The upper part of one side of the buffer tank body 3 far away from the coating tank body 2 is provided with a liquid storage tank 7 fixed on a support frame 9, and the bottom side in the liquid storage tank 7 is communicated with the inside of the buffer tank body 3 through a pipe body. A certain amount of PVDC emulsion is stored in the liquid storage tank 7, when a part of emulsion is consumed in the coating process, the flow of the backflow emulsion in the buffer tank body 3 can be smaller than the flow synchronously supplemented by the diaphragm pump 4, and the emulsion in the liquid storage tank 7 can be properly supplemented to the emulsion in the buffer tank body 3 so as to ensure the sustainability of dynamic circulation.

The fluid infusion mouth has been seted up at the top of buffer box 3, and buffer box 3's inside is provided with and is located buoyancy valve 8 under the fluid infusion mouth. The buoyancy valve 8 is used for monitoring the liquid level in the buffer tank body 3, and when the liquid level descends, the buoyancy valve 8 is opened, and the emulsion in the liquid reserve tank 7 flows into the buffer tank body 3 for the emulsion liquid level in the buffer tank body 3 promotes gradually, and the buoyancy valve 8 follows the promotion of liquid level and closes the fluid infusion mouth gradually simultaneously, stops the fluid infusion process, so realizes the dynamic balance adjustment of liquid level in the buffer tank body 3.

In conclusion, the PVDC emulsion supply device in the PVDC coating process is simple, durable, easy to clean and easy to disassemble, and the emulsion liquid level in the coating tank is kept stable by arranging the buffer tank body and the diaphragm pump and continuously feeding the coating tank body by the diaphragm pump, so that the coating amount of the PVDC is uniform; meanwhile, PVDC emulsion is dynamically circulated in the coating tank body, waste of the PVDC emulsion can be reduced to the maximum extent, the balance of the PVDC emulsion components is ensured by a fountain turbulent flow mode in a continuous and reliable loop, and the production efficiency and the coating quality are further improved.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A PVDC emulsion supply device based on PVDC coating process is used for circulating flow of PVDC emulsion, and is characterized in that: comprises a coating tank body (2), a liquid inlet (23) is arranged on the side wall of the coating tank body (2), the liquid inlet (23) is communicated with a containing cavity in the coating tank body (2), a liquid outlet (24) is arranged on the side wall of the coating tank body (2), the level of the liquid outlet (24) is higher than that of the liquid inlet (23), a liquid outlet pipe (5) is spliced at the position of the liquid outlet (24), a buffer tank body (3) is arranged below the coating tank body (2) so that PVDC emulsion flowing out along the liquid outlet pipe (5) can enter the buffer tank body (3), a diaphragm pump (4) is fixedly arranged at the top of the buffer tank body (3), the input end of the diaphragm pump (4) is communicated with the inside of the buffer tank body (3) through a pipe body, the output end of the diaphragm pump (4) is communicated with the containing cavity of the coating tank body (2) through a pipe body fixedly connected to the liquid inlet (23) on the outer side wall of the coating tank body (2), so as to allow PVDC emulsion to enter the containing cavity of the coating tank body (2).

2. A PVDC emulsion supply apparatus based on PVDC coating process according to claim 1, characterized in that: one side top that coating cell body (2) were kept away from in buffer tank body (3) is provided with liquid reserve tank (7), is stored with the PVDC emulsion of equivalent in liquid reserve tank (7), the inside intercommunication of body and buffer tank body (3) is passed through to the inside bottom side of liquid reserve tank (7), and when the emulsion flow of backward flow was less than the flow of the synchronous supply of diaphragm pump (4) in buffer tank body (3), through the PVDC emulsion replenishment in liquid reserve tank (7) to buffer tank body (3) in.

3. A PVDC emulsion supply apparatus based on PVDC coating process according to claim 2, characterized in that: the fluid infusion mouth has been seted up at the top of buffer box (3), the inside of buffer box (3) is provided with buoyancy valve (8) that are located under the fluid infusion mouth, buoyancy valve (8) are used for monitoring the liquid level in buffer box (3), when the liquid level descends, buoyancy valve (8) are opened, the emulsion in liquid reserve tank (7) supplyes and flows into in buffer box (3), make the emulsion liquid level in buffer box (3) promote gradually, buoyancy valve (8) follow the promotion of liquid level and close the fluid infusion mouth gradually simultaneously, suspend the fluid infusion process, in order to realize the dynamic balance of liquid level and adjust in buffer box (3).

4. A PVDC emulsion supply apparatus based on PVDC coating process according to claim 1, characterized in that: the lower part of the coating tank body (2) is provided with a buffer tank body (6) positioned below the liquid discharge pipe (5), the inside of the buffer tank body (6) is communicated with the inside of the buffer tank body (3) through a pipe body, so that PVDC emulsion flowing out along the liquid discharge pipe (5) flows through the buffer tank body (6) and then enters the buffer tank body (3).

5. A PVDC emulsion supply apparatus based on PVDC coating process according to claim 3, characterized in that: the liquid storage tank (7) is arranged on a support frame (9) so that the liquid storage tank (7) is positioned above the buffer tank body (3).

6. A PVDC emulsion supply device based on PVDC coating process according to claim 4, characterized in that: the coating device is characterized by further comprising a step support (1), wherein the step support (1) comprises a top end bearing surface (11), and the outer end surface of the bottom wall of the coating groove body (2) is arranged on the top end bearing surface (11) of the step support (1).

7. A PVDC emulsion supply device based on PVDC coating process according to claim 6, characterized in that: the ladder support (1) further comprises a secondary top end bearing surface (12) parallel to the top end bearing surface (11), and the buffer groove body (6) is arranged on the secondary top end bearing surface (12) of the ladder support (1).

8. A PVDC emulsion supply apparatus based on PVDC coating process according to claim 7, characterized in that: the top end bearing surface (11) and the secondary top end bearing surface (12) are in transition connection through a connecting plate (13) to form a stepped structure, and a front section supporting foot (111) and a rear section supporting foot (121) are correspondingly arranged on the lower portions of the top end bearing surface (11) and the secondary top end bearing surface (12).