CN111420838A

CN111420838A - PVDC coating film making machine

Info

Publication number: CN111420838A
Application number: CN202010217548.7A
Authority: CN
Inventors: 李建杭; 周遐和; 陈达江
Original assignee: Hangzhou Plastics Industrial Co ltd
Current assignee: Hangzhou Plastics Industrial Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-07-17

Abstract

The invention provides a PVDC coating film making machine which comprises a coating mechanism, a conveying mechanism and a winding mechanism, wherein the conveying mechanism conveys a base film to the coating mechanism to coat a coating, and then the base film is wound by the winding mechanism, the coating mechanism comprises a storage box, a feeding pipe, a discharging pipe, a first coating roller, a second coating roller and a coating pool, PVDC coating is arranged in the coating pool, the feeding pipe and the discharging pipe are connected with the storage box and the coating pool, a heating device is arranged in the storage box, the base film is wound on the first coating roller and the second coating roller, and the first coating roller is completely or partially immersed in the PVDC coating in the coating pool. The PVDC coating film making machine can ensure that sufficient energy is supplied to enable water to volatilize at a constant speed when PVDC latex is in a latex coating state; ensuring that excessive drying does not occur, and preventing the coating from generating coating cracks due to the penetration of bottom layer water vapor after the water boils and coating pinholes or surface skinning appear.

Description

PVDC coating film making machine

Technical Field

The invention relates to a PVDC production technology, in particular to a PVDC coating film making machine.

Background

The PVDC coating film is also called PVDC coating film, or simply K film, i.e. coating film such as KOP (including matte KOP), KPET, KPA, KCPP, KCPE, etc. The K film is a film with high barrier performance obtained by coating one or more layers of polyvinylidene chloride (PVDC) latex on various film materials by using special equipment. The excellent barrier property of the paint mainly shows that the oxygen permeability can be reduced by hundreds of times, so that the quality guarantee period, the aroma retention property, the freshness preservation property, the oil resistance and the like are greatly improved. And has the same printing performance and composite performance as common films, and can also have double-sided heat sealing performance (the heat sealing strength is more than or equal to 0.8N/15 mm) according to requirements.

The barrier capability of the PVDC coating film is directly related to the thickness of the coating, and is further related to the film forming process and the process control of the coating. For example, the film formation process of the PVDC latex coating is latex state (state 1) → dry (state 2) → deformed and thin-filmed state (state 3). State 1 to State 2 must ensure a sufficiently high "body temperature" of the coating; ensuring sufficient energy supply to enable the water to be volatilized at a constant speed; ensuring that excessive drying does not occur, and preventing the coating from generating coating cracks due to the penetration of bottom layer water vapor after the water boils and coating pinholes or surface skinning appear.

Disclosure of Invention

The invention provides a PVDC coating film making machine, which ensures that sufficient energy is supplied to enable water to volatilize at a constant speed when PVDC latex is coated with latex; ensuring that excessive drying does not occur, and preventing the coating from generating coating cracks due to the penetration of bottom layer water vapor after the water boils and coating pinholes or surface skinning appear.

In order to achieve the purpose, the invention adopts the following technical scheme:

the PVDC coating film manufacturing machine comprises a coating mechanism, a conveying mechanism and a winding mechanism, wherein the conveying mechanism conveys a base film to the coating mechanism to coat the coating, and the base film is wound by the winding mechanism, the coating mechanism comprises a storage tank, a feeding pipe, a discharging pipe, a first coating roller, a second coating roller and a coating pond, PVDC coating is arranged in the coating pond, the feeding pipe and the discharging pipe are connected with the storage tank and the coating pond, a heating device is arranged in the storage tank, the base film is wound on the first coating roller and the second coating roller, and the first coating roller is completely or partially immersed in the PVDC coating in the coating pond.

Further, conveying mechanism includes pivot adjustment mechanism, pivot adjustment mechanism includes 3 at least eccentric rollers and gear train, 3 at least eccentric rollers evenly set up along pivot circumference, the gear train includes sun gear and planet wheel, every the one end of eccentric roller is fixed to be set up the planet wheel, each planet wheel with the sun gear meshing, the sun gear is connected with driving motor.

Further, the winding mechanism comprises a winding roller, a driving shaft coaxial with the left end of the winding roller and a rotating seat arranged on the driving shaft, the outer end of the driving shaft is provided with a driving wheel, the left end of the winding roller is fixed with a left baffle plate, and the right side surface of the left baffle plate is fixed with a left positioning taper sleeve sleeved at the left end of the winding roller; a guide shaft is arranged in the center of the right end of the winding roller, an external spline is arranged at the left end of the guide shaft, threads are arranged at the right end of the guide shaft, a right baffle plate is arranged at the right end of the winding roller, the right baffle plate is connected with the guide shaft through the spline, and a right positioning taper sleeve sleeved at the right end of the winding roller is fixed on the left side of the right baffle plate; a rotating sleeve is arranged at the right end of the guide shaft, the rotating sleeve is in threaded connection with the guide shaft, and a pressure spring is arranged between the rotating sleeve and the right baffle; still be equipped with the hole puncher on the right flank of left side baffle, the hole puncher includes the axle of punching and the central siphon that punches, be equipped with on the left side location taper sleeve with the corresponding counter bore of central siphon punches.

Further, the surface of the eccentric roller is coated with an anti-slip rubber layer.

Further, the coating mechanism further comprises a temperature controller and a temperature detector for detecting the PVDC coating in the coating pool, wherein the temperature detector is arranged in the coating pool, the temperature detector is connected with the temperature controller, and the temperature controller is connected with the heating device.

Further, a feed inlet and a discharge outlet are arranged on the coating pool, the feed inlet is arranged at the bottom of the coating pool, and the discharge outlet is arranged at a position close to the PVDC coating liquid level.

Further, coating mechanism still includes charge pump, discharge pump, liquid level detector and pump speed controller, the charge pump sets up on the inlet pipe, the discharge pump sets up on the discharging pipe, the liquid level detector sets up in the coating pond, the liquid level detector with the pump speed controller is connected, pump speed controller with charge pump, discharge pump are connected.

Furthermore, a filter is further arranged on the discharge pipe and is arranged at the front end of the discharge pump.

Furthermore, a limiting sleeve is fixed on the right side face of the right baffle, the outer side face of the limiting sleeve is a conical surface, a limiting ring is arranged on the outer side of the limiting sleeve, the right end of the pressure spring is fixedly connected with the rotating sleeve, and the left end of the pressure spring is fixedly connected with the limiting ring.

After the technical scheme is adopted, the invention has the following advantages:

(1) according to the coating mechanism of the PVDC coating film making machine, the first coating roller and the second coating roller rotate to enable the base film to be uniformly coated with PVDC coating; the PVDC coating entering the coating pool can have enough temperature by heating the PVDC coating in the storage box, and sufficient energy supply is ensured to enable the water to be volatilized at a constant speed; secondly, as the PVDC coating enters the coating pool from the feeding pipe, the temperature is reduced, and the coating can be prevented from generating coating pinholes due to boiling of water or cracking due to penetration of water vapor of a bottom layer after surface skinning.

(2) The rotating shaft adjusting mechanism of the PVDC coating film making machine rotates along with the eccentric roller, and the distance from the outermost end of the eccentric roller to the center of the rotating shaft changes along with the rotation of the eccentric roller, namely the radius of the rotating shaft changes. By adjusting the distance, the rotating shaft can adapt to various models of PVDC coating films.

(3) The winding mechanism of the PVDC coating film making machine can position the hard paper cylinders with different lengths, thereby being suitable for winding PVDC coating films with different widths, and having convenient use and strong universality.

Drawings

FIG. 1 is a schematic structural diagram of a PVDC coating film making machine according to the present invention;

FIG. 2 is a schematic view of the structure of the coating material application mechanism of the present invention;

FIG. 3 is a schematic structural diagram of a rotating shaft adjusting mechanism according to the present invention;

FIG. 4 is a schematic structural diagram of a gear set of the rotating shaft adjusting mechanism according to the present invention;

FIG. 5 is a side view of the spindle adjustment mechanism of the present invention;

FIG. 6 is a comparison of two different states of the spindle adjustment mechanism of the present invention;

FIG. 7 is a schematic structural view of a winding mechanism according to the present invention;

FIG. 8 is an enlarged view of a portion of FIG. 7 at A;

the names of the components marked in the figures are as follows:

i-a paint coating mechanism; II, a conveying mechanism; III-a winding mechanism;

11-a material storage box; 12-a feed pipe; 13-a discharge pipe; 14-a first coating roller; 15-limiting clamping groove; 16-a paint pool; 161-feed inlet; 162-a discharge hole; 17-a heating device; 18-a base film; 19-a temperature controller; 110-a temperature detector; 111-a feed pump; 12-a discharge pump; 113-a liquid level detector; 114-pump speed controller; 115-a filter;

21-an eccentric roller; 22-gear set; 221-sun gear; 222-a planet wheel;

31-a wind-up roll; 32-a drive shaft; 320-an annular groove; 33-a rotating seat; 34-a driving wheel; 35-a left baffle; 36-left positioning taper sleeve; 360-counter bore; 37-a guide shaft; 370-external splines; 371-screw thread; 38-right baffle; 39-right positioning taper sleeve; 310-a rotating sleeve; 311-a stop collar; 312-a stop collar; 313-a pressure spring; 314-a bearing; 315-stop bolt; 316-hard paper cylinder; 317-a puncher; 3170-perforating shaft; 3171-perforated shaft tube.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific examples.

As shown in fig. 1, a PVDC coating film manufacturing machine includes a coating material coating mechanism I, a conveying mechanism II, and a winding mechanism III, where the conveying mechanism II conveys a base film to the coating material coating mechanism I to coat a coating material, and then the base film is wound by the winding mechanism III.

As shown in fig. 2, the paint coating mechanism I includes a storage tank 11, a feed pipe 12, a discharge pipe 13, a first coating roller 14, a second coating roller 15, and a paint reservoir 16. The coating pool 16 is internally provided with PVDC coating, the feed pipe 12 and the discharge pipe 13 are connected with the storage tank 11 and the coating pool 16, the storage tank 11 is internally provided with a heating device 17, the first coating roller 14 and the second coating roller 15 are wound with a base film 18, and the first coating roller 14 is totally or partially immersed in the PVDC coating in the coating pool 16.

The coating material tank 16 is provided with a feed inlet 161 and a discharge outlet 162, the feed inlet 161 is arranged at the bottom of the coating material tank 16, and the discharge outlet 162 is arranged near the PVDC coating material liquid level. The feed inlet 161 is at a higher temperature, and the feed inlet 161 is arranged at the bottom of the coating pond 16 to prevent the PVDC coating from being excessively dried, so that coating pinholes can be prevented from being formed due to boiling of water, or coating cracks can be prevented from being generated due to penetration of water vapor of a bottom layer after surface skinning; the discharge port 162 is arranged close to the liquid level of the PVDC paint, so that dust and other impurities floating on the liquid level of the PVDC paint can be rapidly discharged from the discharge port 162, and the quality of the PVDC paint in the paint pool 16 is ensured.

A temperature detector 110 is arranged in the coating pool 16, a temperature controller 19 is connected with the temperature detector 110, and the temperature controller 19 is connected with the heating device 17. The temperature detector 110 in the coating pool 16 is used for detecting the temperature of the PVDC coating, when the temperature detector 110 detects that the temperature of the PVDC coating is too high, the temperature detector transmits a signal to the temperature controller 19, and the temperature controller 19 controls the heating device 17 in the storage box 11 to increase the heating temperature; when the temperature detector 110 detects that the temperature of the PVDC coating is too low, a signal is transmitted to the temperature controller 19, the temperature controller 19 controls the heating device 17 in the storage box 11 to reduce the heating temperature, so that sufficient energy is supplied to enable moisture to volatilize at a constant speed when the PVDC latex is in a latex coating state, excessive drying is avoided, and coating pinholes are prevented from being formed due to boiling of the moisture or coating cracks are prevented from being generated due to penetration of water vapor on the bottom layer after surface skinning.

The feed pipe 12 is provided with a feed pump 111, the discharge pipe 13 is provided with a discharge pump 112, the coating tank 16 is provided with a liquid level detector 113, the liquid level detector 113 is connected with a pump speed controller 114, and the pump speed controller 114 is connected with the feed pump 111 and the discharge pump 112. The liquid level detector 13 detects the liquid level of the PVDC paint in the paint pool 16 and feeds a liquid level signal back to the pump speed controller 114, and the pump speed controller 14 controls the flow rate of the PVDC paint by controlling the feed pump 111 and the discharge pump 112 to achieve the effect of stabilizing the liquid level of the PVDC paint, so that the PVDC paint is uniformly coated.

The discharge pipe 13 is further provided with a filter 115, and the filter 115 is provided at the front end of the discharge pump 112. The filter 115 is used for filtering impurities in the flowing PVDC paint, and ensuring the purity of the PVDC paint in the storage tank 11 and the PVDC paint entering the paint pool 16.

As shown in fig. 3 to 6, the conveying mechanism II includes a rotation shaft adjusting mechanism including at least 3 eccentric rollers 21 and a gear group 22. At least 3 eccentric rollers 21 are uniformly arranged along the circumferential direction of the rotating shaft, the gear set 22 comprises a sun wheel 221 and planet wheels 222, one end of each eccentric roller 21 is fixedly provided with the planet wheel 222, each planet wheel 222 is meshed with the sun wheel 221, and the sun wheel 221 is connected with a driving motor.

The number of the eccentric rollers 21 is preferably 6 to 12. In this embodiment, the number of the eccentric rollers 21 is 9. If the number of the eccentric rollers 21 is too small, the contact area between the eccentric rollers 21 and the PVDC coating film is too small, which may cause slippage of the PVDC coating film; if the number of the eccentric rollers 21 is too large, the base radius from the rotation center of the eccentric roller 21 to the center of the rotation axis will be large, and in order to obtain a large adjustment amount of the hole diameter of the PVDC coating film through hole, the cross-sectional shape of the eccentric roller 21 should be long and narrow, and the eccentric roller 21 having this shape is easily broken.

The surface of the eccentric roller 21 is coated with an anti-slip rubber layer, so that relative slippage between the eccentric roller 21 and the PVDC coating film is not easy to generate.

As shown in fig. 6, the solid line part indicates that the large radius end of the eccentric roller 21 turns outward, and the dotted line part indicates that the small radius end of the eccentric roller 21 turns outward.

As shown in fig. 7 and 8, the winding mechanism III includes a winding roller 31, a driving shaft 32 coaxial with the left end of the winding roller 31, and a rotating seat 33 provided on the driving shaft 32.

The outer end of the drive shaft 32 is provided with a drive wheel 34, the drive wheel 34 being a gear or a timing wheel. The left baffle 35 is fixed at the left end of the wind-up roll 31, and the left positioning taper sleeve 36 sleeved at the left end of the wind-up roll 31 is fixed at the right side face of the left baffle 35. The right end center of the winding roller 31 is provided with a guide shaft 37, the left end of the guide shaft 37 is provided with an external spline 370, and the right end of the guide shaft 37 is provided with a thread 371. The right end of the winding roller 31 is provided with a right baffle 38, the right baffle 38 is in spline connection with the guide shaft 37, and the left side of the right baffle 38 is fixedly provided with a right positioning taper sleeve 39 sleeved at the right end of the winding roller 31. The right end of the guide shaft 37 is provided with a rotating sleeve 310, and the rotating sleeve 310 is in threaded connection with the guide shaft 37. The right side surface of the right baffle 38 is fixed with a limiting sleeve 31, and the outer side surface of the limiting sleeve 311 is a conical surface. A limiting ring 312 is arranged on the outer side of the limiting sleeve 311, a pressure spring 313 is arranged between the rotating sleeve 310 and the limiting ring 312, the right end of the pressure spring 313 is fixedly connected with the rotating sleeve 310, and the left end of the pressure spring 313 is fixedly connected with the limiting ring 312.

The right side surface of the left baffle 35 is also provided with a puncher 317, the puncher 317 comprises a punching shaft 3170 and a punching shaft pipe 3171, and the left positioning taper sleeve 36 is provided with a counter bore 360 corresponding to the punching shaft pipe 3171. The hard paper tube 316 is punched by the puncher 317, the punching shaft tube 3171 penetrates through the hole in the hard paper tube 316 and extends into the counter bore 360 in the left positioning taper sleeve 36, so that the relative position of the hard paper tube 316 and the winding roller 31 can be kept fixed, and the hard paper tube 316 is prevented from slipping after being tensioned by the left positioning taper sleeve 36 and the right positioning taper sleeve 39.

Two bearings 314 are arranged in the rotating seat 33, the driving shaft 32 is rotatably connected with the bearings 314, an annular groove 320 is arranged at the position, between the two bearings 314, on the driving shaft 32, and a limiting bolt 315 extending into the annular groove 320 is arranged on the side surface of the rotating seat 33.

When the winding mechanism III is used, the rotating sleeve 310 is taken out in a rotating mode, then the right baffle 38 is taken down, the hard paper cylinder 316 is sleeved on the winding roller 31, then the right baffle 38 and the rotating sleeve 310 are sequentially installed, and under the action of the pressure spring 313, the left positioning taper sleeve 36 and the right positioning taper sleeve 39 extend into two ends of the hard paper cylinder 316 to expand the hard paper cylinder 316 tightly; then, the driving shaft 32 is driven by the motor to rotate, the driving shaft 32, the winding roller 31 and the hard paper cylinder 316 synchronously rotate, the PVDC coating film is wound, after the PVDC coating film is wound, the rotating sleeve 310 and the right baffle 38 are sequentially dismounted, and the hard paper cylinder 316 is taken out of the winding roller 31; and because the right baffle 38 is connected with the guide shaft 37 through the spline and is compressed tightly through the pressure spring 313, the hard paper tubes with different lengths can be positioned, so that the device is suitable for rolling PVDC coating films with different widths, and is convenient to use and high in universality.

Other embodiments of the present invention than the preferred embodiments described above will be apparent to those skilled in the art from the present invention, and various changes and modifications can be made therein without departing from the spirit of the present invention as defined in the appended claims.

Claims

1. A PVDC coating film making machine is characterized by comprising a coating material coating mechanism (I), a conveying mechanism (II) and a rolling mechanism (III), the conveying mechanism (II) conveys the base film to the coating mechanism (I) for coating the coating, and then the base film is wound by the winding mechanism (III), the coating mechanism comprises a storage box (11), a feeding pipe (12), a discharging pipe (13), a first coating roller (14), a second coating roller (15) and a coating pool (16), PVDC coating is arranged in the coating pool (16), the feed pipe (12) and the discharge pipe (13) are connected with the storage tank (11) and the coating pool (16), a heating device (17) is arranged in the storage box (11), a base film (18) is wound on the first coating roller (14) and the second coating roller (15), the first coating roller (15) is completely or partially immersed in the PVDC coating material in the coating material bath (16).

2. The PVDC coating film manufacturing machine according to claim 1, wherein the conveying mechanism (II) comprises a rotating shaft adjusting mechanism, the rotating shaft adjusting mechanism comprises at least 3 eccentric rollers (21) and a gear set (22), the at least 3 eccentric rollers (21) are uniformly arranged along the circumferential direction of the rotating shaft, the gear set (22) comprises a sun wheel (221) and planet wheels (222), one end of each eccentric roller (21) is fixedly provided with the planet wheel (222), each planet wheel (222) is meshed with the sun wheel (221), and the sun wheel (221) is connected with a driving motor.

3. The PVDC coating film making machine according to claim 1, wherein the winding mechanism comprises a winding roller (31), a driving shaft (32) coaxial with the left end of the winding roller (31), and a rotating seat (33) arranged on the driving shaft (32), the outer end of the driving shaft (32) is provided with a driving wheel (34), the left end of the winding roller (31) is fixed with a left baffle plate (35), and the right side surface of the left baffle plate (35) is fixed with a left positioning taper sleeve (36) sleeved on the left end of the winding roller (31); a guide shaft (37) is arranged in the center of the right end of the winding roller (31), an external spline (370) is arranged at the left end of the guide shaft (37), a thread (371) is arranged at the right end of the guide shaft (37), a right baffle (38) is arranged at the right end of the winding roller (31), the right baffle (38) is in spline connection with the guide shaft (37), and a right positioning taper sleeve (39) sleeved at the right end of the winding roller (31) is fixed to the left side of the right baffle (38); a rotating sleeve (310) is arranged at the right end of the guide shaft (37), the rotating sleeve (310) is in threaded connection with the guide shaft (37), and a pressure spring (313) is arranged between the rotating sleeve (310) and the right baffle (38); still be equipped with hole puncher (317) on the right flank of left baffle (35), hole puncher (317) are equipped with on the left side position taper sleeve (36) with counter bore (360) that the central siphon that punches (3171) corresponds including punch shaft (3170) and central siphon (3171) that punches.

4. The PVDC coating film making machine according to claim 2, wherein the surface of said eccentric roller (21) is coated with a non-slip rubber layer.

5. The PVDC coated film maker according to claim 1, wherein the coating material coating mechanism (I) further comprises a temperature controller (19) and a temperature detector (110) for detecting PVDC coating material in the coating material pool (16), the temperature detector (110) being disposed within the coating material pool (16), the temperature detector (110) being connected to the temperature controller (19), the temperature controller (19) being connected to the heating device (17).

6. The PVDC coating film making machine according to claim 1, wherein said coating material pool (16) is provided with a feed inlet (161) and a discharge outlet (162), said feed inlet (161) is arranged at the bottom of said coating material pool (16), and said discharge outlet (162) is arranged near the PVDC coating material liquid level.

7. The PVDC coated film making machine according to any of the claims 1 or 5 or 6, wherein said coating material coating mechanism (I) further comprises a feed pump (111), a discharge pump (112), a liquid level detector (113) and a pump speed controller (114), said feed pump (111) is arranged on said feed pipe (12), said discharge pump (112) is arranged on said discharge pipe (13), said liquid level detector (113) is arranged in said coating material pool (16), said liquid level detector (113) is connected with said pump speed controller (114), said pump speed controller (114) is connected with said feed pump (111) and discharge pump (112).

8. The PVDC coated film manufacturing machine according to claim 7, wherein a filter (115) is further provided on the discharging pipe (13), and the filter (115) is provided at a front end of the discharging pump (112).

9. The PVDC coating film making machine according to claim 3, wherein a limiting sleeve (311) is fixed on the right side surface of the right baffle (38), the outer side surface of the limiting sleeve (311) is a conical surface, a limiting ring (312) is arranged on the outer side of the limiting sleeve (311), the right end of the pressure spring (313) is fixedly connected with the rotating sleeve (310), and the left end of the pressure spring (313) is fixedly connected with the limiting ring (312).

10. The PVDC coating film making machine according to claim 3, wherein two bearings (314) are arranged in the rotating seat (33), the driving shaft (32) is rotatably connected with the bearings (314), an annular groove (320) is arranged on the driving shaft (32) between the two bearings (314), and a limiting bolt (315) extending into the annular groove (320) is arranged on the side surface of the rotating seat (33).