Film resin compounding equipment

Abstract

The invention relates to the field of resin compounding equipment, and discloses film resin compounding equipment which comprises a rack, a base material coating surface treatment mechanism and a coating mechanism, the coating mechanism comprises a die head, and a first adjusting part, a second adjusting part and a third adjusting part are arranged in the die head in a sliding mode; the volume of the first cavity and the volume of the second cavity are adjusted through the first adjusting piece and the second adjusting piece correspondingly, so that the resin flowing-out speed of the coating lip is adjusted, the resin coating thickness is further controlled, the controllability of resin flowing out of the die head is higher through the special design of the die head, and the product quality is improved. A first cavity, a second cavity and a third cavity in the die head are respectively provided with a first adjusting part, a second adjusting part and a third adjusting part which are adjustable, and the adjusting parts can accurately control the flow and the coating thickness of resin and reduce the temperature when the resin is in contact with a film substrate, so that the heat damage is reduced, and the service life of the film substrate is prolonged. And meanwhile, the adhesion performance between the resin and the film substrate is enhanced through gluing, and the falling or stripping phenomenon between the resin and the substrate is reduced.

Description

Technical Field

[0001] The invention relates to the field of resin composite equipment, in particular to a thin film resin composite equipment. Background Art

[0002] In the field of thin film resin composite technology, thin films are usually used as substrates. The substrates move at a constant speed on a frame, and the resin is coated on the substrate through an extruder. In the existing thin film resin production process, the resin particles are converted into a molten state in the extruder, extruded to the coating lip through an auger, and then coated on the substrate moving at a constant speed through the coating lip. However, a common problem in the current production process is that during the resin coating process, the resin is in a molten state. When it is directly coated on the film substrate, the film substrate is easily deformed due to heat, resulting in unstable product quality, affecting production efficiency and economic benefits.

[0003] At present, in order to reduce the damage of resin coating to the film substrate, the conventional solution is: put a coating roller under the coated substrate and use the roller for heat exchange to reduce the temperature of the resin. However, when the temperature of the film substrate is too low, the following problems still exist: 1. Condensed water is precipitated on the surface of the film substrate, which affects the composite work of the resin and the film substrate, resulting in poor adhesion between the resin and the substrate, which is easy to fall off or peel off during subsequent processing or use; 2. The film substrate is not cooled enough, so that the substrate will still be damaged at the moment of contact between the resin and the substrate. Summary of the invention

[0004] The present invention is intended to provide a thin film resin composite device to improve the adhesion between the thin film substrate and the resin and reduce the damage of the substrate.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a thin film resin composite equipment, including a frame, a substrate coating surface processing mechanism and a coating mechanism, a thin film substrate is stretched on the frame, the substrate coating surface processing mechanism includes a gluing part, the gluing part includes a glue tank storing glue, a transition roller is rotatably arranged on the glue tank, and the transition roller is fitted with the thin film substrate; the coating mechanism includes a die head, the die head includes a shell, a first adjusting member, a second adjusting member and a third adjusting member, a first chamber, a second chamber and a third chamber are arranged in the shell, and a coating lip is arranged on the side of the shell away from the first chamber; the first chamber is connected to the discharge port of the extruder; the second chamber is arranged between the first chamber and the third chamber, and is respectively connected to the first chamber and the third chamber; the third chamber is connected to the coating lip, and the first adjusting member, the second adjusting member and the third adjusting member are respectively slidably arranged in the first chamber, the second chamber and the third chamber.

[0006] The principle and advantages of this solution are: The principle of the present invention is: the present invention adjusts the volume of the first chamber and the second chamber respectively through the first adjusting member and the second adjusting member, thereby adjusting the outflow speed of the coating lip resin, and then controlling the resin coating thickness. The adjustment principle is as follows:

[0007] The volumes of the first chamber and the second chamber are adjusted by the first adjusting member and the second adjusting member respectively, thereby adjusting the outflow speed of the coating lip resin, and then controlling the thickness of the resin coating. The adjustment principle is as follows:

[0008] When the volume of the first cavity decreases:

[0009] Pressure increase: The volume of the first cavity decreases, resulting in an increase in pressure, and the speed at which the resin passes through the first cavity into the second cavity increases.

[0010] Increased flow rate: The pressure in the second cavity increases, and the speed at which the resin passes through the second cavity into the third cavity increases, resulting in an increase in the pressure at the coating lip outlet and a decrease in coating thickness.

[0011] When the volume of the second cavity decreases:

[0012] Pressure increase: The reduction in the volume of the second cavity causes the pressure to increase, and the speed at which the resin passes through the second cavity into the third cavity increases.

[0013] Flow rate slows down: Although the pressure in the third cavity increases, since the volume of the third cavity remains unchanged, the speed at which the resin passes through the coating lip slows down, resulting in a thicker coating thickness.

[0014] In actual application, 1. The adhesion between the resin and the film substrate is enhanced by coating with glue. A layer of glue is pre-coated on the film substrate, and the adhesion between the resin and the film substrate is enhanced by utilizing the adhesion properties of the glue, thereby reducing the shedding or peeling phenomenon between the resin and the substrate; 2. The special design of the die head is utilized to make the resin flowing out of the die head more controllable. The first chamber, the second chamber and the third chamber in the die head are respectively provided with adjustable first adjusting parts, second adjusting parts and third adjusting parts. These adjusting parts can accurately control the flow rate and coating thickness of the resin, reduce the temperature when the resin contacts the film substrate, and thus reduce thermal damage.

[0015] Preferably, as an improvement, the substrate coating surface treatment mechanism further includes a drying section, the drying section includes a drying box body and a heating element, the drying box body includes a first shell and a second shell, a gap is reserved between the first shell and the second shell for the film substrate to pass through, and the heating element is arranged in the second shell. The heating element in the drying box body is used to remove the organic solvent in the glue, enhance the viscosity of the glue, and improve the adhesion; and the probability of bubbles generated after the glue solidifies can be reduced, thereby improving the transparency of the composite film.

[0016] Preferably, as an improvement, the first shell is fixedly arranged on the frame, and the second shell is slidably arranged on the frame. The split design of the drying box body is used to facilitate film penetration and subsequent maintenance.

[0017] Preferably, as an improvement, an air outlet is provided on the top surface of the second shell, the air outlet is connected to a bellows, and the bellows is connected to an exhaust gas treatment device. The design of the bellows and the exhaust gas treatment device can effectively collect and treat the exhaust gas generated during the drying process, reducing environmental pollution.

[0018] Preferably, as an improvement, the glue is UV glue, and the substrate coating surface treatment mechanism further includes a photolysis unit, which is arranged after the drying unit and is used to perform photocuring on the dried glue layer. Through photocuring, the glue layer forms a stable film layer, providing a flat and firm surface, which is conducive to the uniform distribution of the subsequent resin coating.

[0019] Preferably, as an improvement, the substrate coating surface treatment mechanism further includes a corona part, which is arranged at the front side of the glue coating part and is used to perform corona treatment on the glue coating surface to increase the surface roughness of the film substrate and enhance the adhesion between the glue and the film substrate.

[0020] Preferably, as an improvement, a connecting throat is provided between the first chamber and the second chamber, and the connecting throat is designed to be small in the middle and large at both ends.

[0021] Preferably, as an improvement, the coating mechanism also includes a coating roller, which has a built-in heat exchange pipe, in which a cooling medium circulates, and the coating roller is rotatably arranged below the die head and a gap is reserved between the coating lip, and the film substrate passes through the gap and fits the coating roller.

[0022] Preferably, as an improvement, the first adjusting member, the second adjusting member and the third adjusting member each include an adjusting member body and a screw rod, the adjusting member body is slidably arranged inside the shell, the screw rod is threadedly connected to the shell, and one end of the screw rod is rotatably connected to the adjusting member body.

[0023] Preferably, as an improvement, a trimming and discharging unit is further included, the trimming and discharging unit includes a discharging member and a cutting knife, the cutting knife is fixedly arranged on the frame to trim the film substrate to obtain waste, and the discharging member transports the waste away. The trimming and discharging unit is used to trim the edge of the film resin to reduce the generation of burrs, so that the produced film resin composite material is more regular. At the same time, the discharging member is used to transport away the waste generated by trimming, which can prevent the waste from being adsorbed to the product surface under the action of static electricity and affecting the stability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0025] Figure 2 Schematic diagram of the die structure of an embodiment of the present invention.

[0026] Figure 3 It is a schematic structural diagram of a discharge member according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following is further described in detail through specific implementation methods:

[0028] The reference numerals in the drawings of the specification include: waste 01, die head 11, shell 112, feed pipe 111, first chamber 1121, second chamber 1122, third chamber 1123, connecting throat 1124, first adjusting member 1131, second adjusting member 1132, third adjusting member 1133, cooling roller body 12, third adjusting roller 121, fourth adjusting roller 122, first adjusting member 131, second adjusting member 132, third adjusting member 133, first turning roller 211, second turning roller 212, third turning roller 213, transition roller 221, glue tank 222, oven body 24, exhaust pipe 241, first adjusting roller 231, second adjusting roller 232, material collecting roller 3, material collecting tensioning roller 31, cutting knife 321, waste discharge pipe 322, waste inlet pipe 321, air inlet 323.

[0029] The embodiment is basically as shown in the attached Figure 1-3 As shown: Figure 1-3 The thin film resin composite equipment shown in the figure includes a frame, a substrate coating surface processing mechanism and a coating trimming mechanism, such as Figure 1 As shown, the film is tensioned on the frame through a tensioning mechanism, the tensioning mechanism includes a feed discharging roller, a receiving roller 3 and a receiving tensioning roller 31, the feed discharging roller, the receiving roller 3 and the receiving tensioning roller 31 are all rotatably arranged on the frame, a film is fixed on the feed discharging roller, the film is tensioned between the feed discharging roller and the receiving tensioning roller 31 to form a film substrate, the substrate coating surface treatment mechanism includes a corona section, a gluing section, a drying section and a photolysis section, the corona section is provided with a corona generator, the corona section is arranged on the front side of the gluing section, and is used to perform corona treatment on the gluing surface to increase the roughness of the film substrate surface and facilitate the adhesion of glue at the gluing section.

[0030] The glue coating part includes a first steering roller 211, a second steering roller 212, a third steering roller 213 and a glue groove 222. The film substrate is cooperated with the first steering roller 211, the second steering roller 212 and the third steering roller 213 so that the top surface of the film substrate passes through the glue groove 222. Glue circulates in the glue groove 222, and the circulation can be achieved by a circulating pump. In this scheme, the glue is UV glue. A transition roller 221 is rotatably arranged on the glue groove 222. The transition roller 221 is bonded to the film substrate, and the surface of the substrate treated by the corona part is bonded to the transition roller 221. Therefore, the glue in the glue groove 222 is coated on the top surface of the substrate through the rotation of the transition roller 221, thereby preventing the glue from entering the bottom surface that does not need to be coated with glue, thereby reducing the loss of glue.

[0031] The drying part includes a drying box body, a first adjusting rod 231, a second adjusting rod 232 and a heating element. The drying box body includes a first shell 112 and a second shell 112. The first shell 112 is fixedly arranged on the frame, and the second shell 112 is slidably arranged on the frame. The heating element is arranged in the first shell 112. The top surface of the second shell 112 is provided with an air outlet, the air outlet is connected with a bellows, and the free end of the bellows is connected with an exhaust gas treatment device.

[0032] A channel is reserved between the first shell 112 and the second shell 112 for the film substrate to pass through. The first adjustment rod 231 and the second adjustment rod 232 are rotatably arranged on both sides of the channel, so that the film substrate passes through the channel in mid-air to avoid the glue coated on the top surface of the film substrate from scratching the drying box body and affecting the uniformity of the glue.

[0033] The photolysis section is provided with a UV light curing treatment device, which is fixed on a frame between the drying section and the coating mechanism by bolts and is used for performing a light curing treatment on the glue layer after drying.

[0034] During processing, the film substrate passes through the corona section, the gluing section, the drying section and the photolysis section in sequence. When passing through the corona section, the corona treatment is used to increase the roughness of the substrate surface to facilitate the subsequent adhesion of glue. When passing through the gluing section, the transition roller 221 is used to brush the glue in the glue groove 222 onto the surface of the substrate to prevent the glue from sticking to the side of the substrate that does not need to be coated with glue. Then it enters the drying section. When the glue attached to the surface passes through the drying section, the glue is heated and dried by the drying section, thereby reducing the content of organic solvents in the glue and increasing the viscosity of the glue. On the one hand, the adhesion performance of the glue is improved. At the same time, it can also prevent the organic solvents in the glue from generating bubbles during the photocuring process, affecting the transparency of the finished product, and reducing the curing time of the glue. The film substrate passes through the corona section, the gluing section, the drying section and the photolysis section in sequence, so that a layer of cured glue adheres to the surface of the film substrate.

[0035] The coating and trimming mechanism includes a coating unit and a trimming and discharging unit. The coating unit includes a die head 11 and a coating roller. Figure 2 As shown, the die head 11 includes a shell 112, a first end cover and a second end cover. The shell 112 is a split design. The first end cover is fixed with a first blocking member 1131, a second blocking member 1132 and a third blocking member 1133. The second end cover is rotatably provided with a first adjusting member 131, a second adjusting member 132 and a third adjusting member 133. The structures of the first adjusting member 131, the second adjusting member 132 and the third adjusting member 133 are basically the same, and all include an adjusting member body and a driving rod. The driving rod is rotatably provided on the adjusting member body, and the adjusting member body is slidably provided inside the shell 112. The driving rod is threadedly connected to the second end cover, and the free end of the driving rod is connected to a servo motor, and the output shaft of the servo motor is welded to the driving rod. The first end cover and the second end cover are bolted to the two ends of the shell 112 respectively, and the shell 112 is divided into a first chamber 1121, a second chamber 1122 and a third chamber 1123 by the first adjusting member 131, the second adjusting member 132 and the third adjusting member 133. The first chamber 1121, the second chamber 1122 and the third chamber 1123 correspond to the first adjusting member 131, the second adjusting member 132 and the third adjusting member 133 respectively; the first chamber 1121 is connected to an extruder, which can be an extrusion molding machine for plastic production disclosed in the publication number CN117048016B; the second chamber 1122 is arranged between the first chamber 1121 and the third chamber 1123, and is connected to the first chamber 1121 and the third chamber 1123 respectively; the third chamber 1123 is provided with a coating lip away from the first chamber 1121, the third chamber 1123 is connected to the coating lip, and the coating lip is connected to the atmosphere.

[0036] During assembly, firstly thread the first blocking member, the second blocking member and the third blocking member onto the first end cover, and extend the first blocking member, the second blocking member and the third blocking member into the body of the shell 112, and at the same time, place the first adjusting member 131, the second adjusting member 132 and the third adjusting member 133 into the body of the shell 112, and then, fix the body of the shell 112 to the first fastener and the second fastener by bolts, and finally, pass the driving rod through the second end cover, and fix the first end cover and the second end cover to the second fastener by bolts to complete the assembly of the die head 11.

[0037] During adjustment, the volumes of the first chamber 1121 and the second chamber 1122 are adjusted by the relative positions of the first adjusting member 131 and the second adjusting member 132 and the shell body 112, and the coating width of the coating lip is determined by the relative position of the third adjusting member 133 and the shell body 112. The molten resin flowing out of the extruder flows through the first chamber 1121, the second chamber 1122 and the third chamber 1123 in sequence, and flows out through the coating lip to be coated on the surface of the film substrate.

[0038] like Figure 2 As shown, a connecting throat 1124 is provided between the first chamber 1121 and the second chamber 1122, and between the second chamber 1122 and the third chamber 1123. The connecting throat 1124 is designed to be small in the middle and large at both ends. The lower parts of the cross sections of the first chamber 1121 and the second chamber 1122 shrink toward the connecting throat 1124. With the help of the special setting of the connecting throat 1124, the melt can fill the first chamber 1121, the second chamber 1122 and the third chamber 1123 in sequence, so that by adjusting the volume of the first chamber 1121 and the second chamber 1122, the flow rate of the melt flowing out of the coating lip is adjusted, and finally the thickness of the resin coating is adjusted. At the same time, when the melt can fill the first chamber 1121, the second chamber 1122 and the third chamber 1123 in sequence, the resin can flow out of the coating lip in a waterfall shape, thereby avoiding the appearance of a bulge-like coating during resin coating, which affects the uniformity of the resin coating.

[0039] The coating roller is rotatably arranged on the frame, a heat exchange pipe is arranged inside the coating roller, a cooling medium circulates in the heat exchange pipe, the coating roller is rotatably arranged below the die head 11 and a gap is reserved between the coating lip, the film substrate passes through the gap and fits the coating roller. The temperature range of the cooling medium is 15-20°C, so that the resin melt coated on the film substrate is cooled by the heat transfer of the cooling medium, and the high-temperature resin melt is prevented from damaging the film substrate.

[0040] The trimming and discharging unit includes a discharging member and a cutting knife 321, such as Figure 3 As shown, the discharge member includes a waste discharge pipe 322, a waste inlet pipe 321 is bonded to the side wall of the waste discharge pipe 322, an air inlet 323 is provided at one end of the waste discharge pipe 322, and a blower is provided at the air inlet 323, as shown in FIG. Figure 1 As shown, the cutting knife 321 includes a blade and a blade body, the blade body is bolted to the frame, the blade body can pierce the film substrate and cut the stretched film substrate. In this embodiment, two cutting knives 321 are provided, and the spacing between the two cutting knives 321 is less than or equal to the width of the resin coating, so that the film substrate not coated with resin is cut off by the cutting knife 321 to improve the regularity of the finished product. The cut film substrate is waste 01, and the waste 01 passes through the waste inlet pipe 321 into the waste outlet pipe 322, and is discharged along the waste outlet pipe 322 under the action of the blower.

[0041] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A film resin composite device, Features: It includes a frame, a substrate coating surface processing mechanism and a coating mechanism, a film substrate is tensioned on the frame, the substrate coating surface processing mechanism includes a gluing part, the gluing part includes a glue tank storing glue, a transition roller is rotatably arranged on the glue tank, and the transition roller is fitted with the film substrate; the coating mechanism includes a die head, the die head includes a shell, a first adjusting member, a second adjusting member and a third adjusting member, a first chamber, a second chamber and a third chamber are arranged in the shell, and a coating lip is arranged on the side of the shell away from the first chamber; the first chamber is connected to the discharge port of the extruder; the second chamber is arranged between the first chamber and the third chamber, and is respectively connected to the first chamber and the third chamber; the third chamber is connected to the coating lip, and the first adjusting member, the second adjusting member and the third adjusting member are respectively slidably arranged in the first chamber, the second chamber and the third chamber.

2. A thin film resin composite device according to claim 1, Features: The substrate coating surface processing mechanism also includes a drying part, which includes a drying box body and a heating element. The drying box body includes a first shell and a second shell. A gap is reserved between the first shell and the second shell for the film substrate to pass through. The heating element is arranged in the second shell.

3. A thin film resin composite device according to claim 2, Features: The first shell is fixedly arranged on the frame, and the second shell is slidably arranged on the frame.

4. A thin film resin composite device according to claim 3, Features: An air outlet is arranged on the top surface of the second shell, the air outlet is connected to a bellows, and a free end of the bellows is connected to an exhaust gas treatment device.

5. A thin film resin composite device according to claim 4, Features: The glue is UV glue, and the substrate coating surface processing mechanism also includes a photolysis part, which is arranged between the drying part and the coating mechanism.

6. A thin film resin composite device according to claim 5, Features: The substrate coating surface treatment mechanism also includes a corona part, which is arranged at the front side of the glue coating part and is used for performing corona treatment on the glue coating surface.

7. A thin film resin composite device according to claim 1, Features: A connecting throat is provided between the first chamber and the second chamber, and the connecting throat is designed to be small in the middle and large at both ends.

8. A thin film resin composite device according to claim 7, Features: The coating mechanism also includes a coating roller, which has a heat exchange pipe built in it. A cooling medium circulates in the heat exchange pipe. The coating roller is rotatably arranged below the die head and a gap is reserved between the coating lip. The film substrate passes through the gap and fits the coating roller.

9. A thin film resin composite device according to claim 8, Features: The first adjusting member, the second adjusting member and the third adjusting member all include an adjusting member body and a screw rod. The adjusting member body is slidably arranged inside the shell, the screw rod is threadedly connected to the shell, and one end of the screw rod is rotatably connected to the adjusting member body.

10. A thin film resin composite device according to claim 1, Features: It also includes a trimming and discharging unit, which includes a discharging piece and a cutting knife. The cutting knife is fixedly arranged on the frame to trim the film substrate to obtain waste materials, and the discharging piece transports the waste materials away.

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