Double-layer co-extrusion cover tape equipment and process

Abstract

The invention belongs to the technical field of extrusion molding equipment, and specifically is a double-layer co-extrusion extrusion molding cover tape equipment and a process thereof, the process comprising the following steps: S1: placing a substrate on a reel and pulling it through various devices in sequence; S2: coating an AC agent on the surface of the substrate and drying it; S3: extruding and compounding the substrate coated with the AC agent and a second substrate formed by extrusion; using a cooling roller to quickly and effectively cool and shape the composite film; S4: after the composite film material is subjected to edge trimming by a trimming machine, it is wound up by a winder to obtain a base layer used in subsequent cover tape production; the invention provides a plurality of independently circulating cooling chambers so that the cooling effect of the cooling roller on the composite film is good, the molding quality of the composite film is improved, and then the extruded composite film is used as the base layer to improve the various physical properties of the cover tape, so that the quality of the cover tape is good.

Description

Technical Field

[0001] The invention belongs to the technical field of extrusion molding equipment, in particular to a double-layer co-extrusion extrusion molding cover tape equipment and a process thereof. Background Art

[0002] The cover tape is a heat-sealed cover on the continuously formed recessed portion of the carrier tape that contains electronic components, forming a closed space. The structure of the cover tape includes a base layer, an interface layer, and an adhesive layer. The performance of the base layer will affect the tensile strength, wear resistance, temperature resistance, corrosion resistance, and antistatic performance of the cover tape. By using extruded composite film as the base layer, the physical properties of the cover tape are improved, making the quality of the cover tape good.

[0003] At the same time, the main process flow for the production of extruded composite film includes main unwinding, coating of AC agent, drying, extrusion composite, trimming and winding, etc. The substrate in the extruded composite film is stably discharged through the main unwinding, and then the surface of the substrate is coated with AC agent and dried to ensure that the AC agent is evenly and stably coated on the substrate. Then, the substrate and the second substrate extruded in the extruder are extruded and composited by the composite unit, so that the substrates are composited into a whole under the action of AC agent and pressure, and the composite whole is quickly cooled and shaped, and finally the composite whole is trimmed and rolled.

[0004] During the extrusion compounding process, after the composite film in the existing compounding unit is extruded and compounded, the cooling roller cannot quickly and effectively cool the composite film, so that the composite film cannot be quickly cooled and solidified, affecting the quality of the composite film. At the same time, for a forced water-cooled plastic extrusion film compounding unit with the publication number CN114193741B in the prior art, a cooling chamber is formed by arranging a plurality of partitions in the cooling roller, and a water dividing plate is arranged in the cooling chamber, and the cooling chamber is divided into a water inlet chamber and a return water chamber by the water dividing plate, and the interior of the cooling roller is divided into a plurality of independent water inlet and return isolations, thereby improving the heat exchange efficiency between the cold water and the roller body. However, when in use, the internal cooling chamber is relatively large, and the cooling water is not easy to quickly leave the cooling chamber after exchanging heat with the roller body. At the same time, after the cold water fills the cooling chamber, the cold water is prone to insufficient fluidity in the cooling chamber, and there is a situation where the cold water leaves the cooling chamber as soon as it enters. Summary of the invention

[0005] In order to make up for the shortcomings of the prior art, a plurality of independent cooling cavities are arranged through the cooperation between the rubber layer and the inner wall of the roller body, and the cooling water in the cooling cavity can circulate quickly, so as to avoid the large space in the cooling cavity and insufficient fluidity of the cooling water, which affect the cooling effect and molding quality of the composite film. The present invention proposes a double-layer co-extrusion cover tape molding equipment and process.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: a double-layer co-extrusion cover tape forming device according to the present invention comprises a compound machine, the compound machine comprises a frame, a silicone roller, a cooling roller and a peeling roller are sequentially installed on the frame from right to left, an extrusion die head of the extruder is placed between the silicone roller and the cooling roller, and a water inlet and a water outlet are respectively arranged at both ends of the cooling roller;

[0007] A cooling cavity is arranged on the inner wall of the cooling roller, a central tube is installed in the cooling roller, a water inlet pipe and a water return pipe are installed in the central tube, the water inlet pipe is connected with the water inlet, the water return pipe is connected with the water outlet, a conveying rod is installed between the water inlet pipe and the cooling cavity, a recovery rod is installed between the water return pipe and the cooling cavity, and the cooling water in the water inlet pipe passes through the conveying rod, the cooling cavity and the recovery rod in sequence and then enters the water return pipe;

[0008] The cooling chamber is in a ring shape, and is provided with multiple groups of cooling chambers. The cooling chambers are not interconnected, and pressure valves are installed at the water inlet and the water outlet. The pressure in the water inlet pipe is greater than the pressure in the water return pipe.

[0009] Preferably, a rubber layer is installed inside the cooling roller, a cooling groove is opened on the rubber layer, the cooling groove and the inner wall of the cooling roller are combined to form a cooling cavity, and the conveying rod and the recovery rod are connected to the cooling groove;

[0010] The inner wall of the cooling roller is mirror-finished, the inner wall surface of the cooling groove is hydrophobic, and the rubber layer has elasticity.

[0011] Preferably, a partition plate is installed in the central tube, and the partition plate isolates the water inlet pipe and the water return pipe from each other. A heat insulation layer is provided inside the partition plate and outside the central tube.

[0012] Preferably, a diverter block is installed in the cooling trough, the length direction of the diverter block is the same as the length direction of the cooling roller, and the diverter block divides the inlet of the conveying rod in the cooling trough into two parts;

[0013] The diverter block is inclined toward one end of the delivery rod, and the cross section of the diverter block is a triangle.

[0014] Preferably, a heat sink is installed on the inner wall of the cooling roller, the heat sink does not contact the bottom surface of the cooling groove, and the heat sink is an annular structure as a whole.

[0015] Preferably, the interior of the heat sink is a heat pipe structure.

[0016] Preferably, the cross section of the heat sink is wavy.

[0017] A double-layer co-extrusion cover tape forming process, the process is applicable to any of the double-layer co-extrusion cover tape forming equipment described above, the process comprises the following steps:

[0018] S1: placing the substrate on the unwinder, then pulling the end of the substrate so that the substrate passes through the gluing device, the infrared heating device, the laminating machine, the trimming device and the winding machine in sequence;

[0019] S2: applying AC agent to the surface of the substrate by a coating device, and then drying the applied AC agent by an infrared heating device;

[0020] S3: After the AC-coated substrate enters the laminating machine, the extruder extrude the second substrate from the extrusion die head to form the second substrate, so that the coated second substrate reaches between the silicone roller and the cooling roller in the laminating machine, thereby completing the lamination of the substrate and the second substrate; at the same time, cooling water is passed into the cooling roller in the laminating machine to quickly and effectively cool and shape the composite film;

[0021] S4: After the composite film material is trimmed by a trimming machine, it is wound up by a winder to obtain the base layer used in the subsequent cover tape production.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The double-layer co-extrusion molding cover tape equipment and process described in the present invention sets a plurality of independently circulating cooling chambers through the cooperation between the rubber layer and the inner wall of the roller body, so that the cooling water in the cooling chamber can circulate quickly, so that the cooling roller has a good cooling effect on the composite film, improves the molding quality of the composite film, and then uses the extruded composite film as the base layer to improve the various physical properties of the cover tape, so that the quality of the cover tape is good.

[0024] 2. The double-layer co-extrusion molding cover tape equipment and process described in the present invention, by arranging a rubber layer, a cooling trough, a diversion block, a water inlet pipe, a water return pipe, a conveying rod and a recovery rod, the rubber layer and the inner wall of the roller body cooperate to form a plurality of independent cooling cavities, and the cooling water in the cooling cavity can be circulated quickly, thereby improving the heat exchange effect between the cooling water and the cooling roller, avoiding the situation where the space in the cooling cavity is large and affects the discharge of the cooling water, and the cooling water is discharged after entering the cooling cavity, resulting in the heat exchange between the cooling water and the cooling roller being affected, thereby affecting the cooling effect of the cooling roller on the composite film and the molding quality of the composite film. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 is a front view of the cover tape device of the present invention;

[0027] Figure 2 is a cross-sectional view of a cooling roller in a cover tape device of the present invention;

[0028] Figure 3 is a cross-sectional view of a cooling roller in a cover tape device of the present invention;

[0029] Figure 4 It is a schematic diagram of the structure of the rubber layer inside the cooling roller in the cover tape device of the present invention;

[0030] Figure 5 yes Figure 2 A partial enlarged view of the middle part;

[0031] Figure 6 yes Figure 3 A partial enlarged view of point B in the middle;

[0032] Figure 7 yes Figure 3 A partial enlarged view of point C in the middle;

[0033] Figure 8 yes Figure 3 A partial enlarged view of point D in the middle;

[0034] Fig. 9 It is a process flow chart of the present invention;

[0035] In the figure: frame 1, silicone roller 11, extrusion die head 12, stripping roller 13, cooling roller 2, water inlet 21, water outlet 22, rubber layer 3, cooling trough 31, diverter block 32, heat sink 33, center tube 4, partition plate 41, water inlet pipe 411, return pipe 412, conveying rod 42, recovery rod 43. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0037] like Figures 1 to 9 As shown, a double-layer co-extrusion cover tape forming device of the present invention comprises a compound machine, the compound machine comprises a frame 1, a silicone roller 11, a cooling roller 2 and a peeling roller 13 are sequentially installed on the frame 1 from right to left, an extrusion die head 12 of an extruder is placed between the silicone roller 11 and the cooling roller 2, and a water inlet 21 and a water outlet 22 are respectively provided at both ends of the cooling roller 2;

[0038] A cooling cavity is provided on the inner wall of the cooling roller 2, a central tube 4 is installed in the cooling roller 2, a water inlet pipe 411 and a water return pipe 412 are installed in the central tube 4, the water inlet pipe 411 is connected with the water inlet 21, the water return pipe 412 is connected with the water outlet 22, a conveying rod 42 is installed between the water inlet pipe 411 and the cooling cavity, a recovery rod 43 is installed between the water return pipe 412 and the cooling cavity, and the cooling water in the water inlet pipe 411 passes through the conveying rod 42, the cooling cavity, and the recovery rod 43 in sequence before entering the water return pipe 412;

[0039] The cooling cavity is in a ring shape, and multiple groups of cooling cavities are provided. The cooling cavities are not connected to each other. Pressure valves are installed at the water inlet 21 and the water outlet 22. The pressure in the water inlet pipe 411 is greater than the pressure in the water return pipe 412.

[0040] When the substrate and the second substrate are extruded and composited, the substrate coated with the AC agent and dried enters between the silicone roller 11 and the cooling roller 2 through the guide roller. At the same time, the second substrate extruded from the extrusion die 12 of the extruder also reaches between the silicone roller 11 and the cooling roller 2, so that the substrate and the second substrate are extruded and composited under the extrusion force of the silicone roller 11 and the bonding effect of the AC agent. At the same time, the composite film after molding moves with the rotation of the cooling roller 2, and the composite film is peeled off from the cooling roller 2 at the peeling roller 13, and then enters the subsequent trimming process under the action of the guide roller.

[0041] At the same time, during the extrusion composite process, the cooling roller 2 into which cooling water is passed quickly and effectively cools the composite film, so that the composite film is quickly shaped, and the quality of the composite film is ensured, thereby avoiding the composite film not being able to be cooled and shaped in time, resulting in deformation of the composite film or adhesion of the composite film to the silicone roller 11, which affects the extrusion molding effect of the composite film;

[0042] At the same time, the external cooling equipment delivers cooling water from the water inlet 21 to the inside of the cooling roller 2, and then the cooling water enters the cooling chamber from the delivery rod 42, and uses the relatively low temperature of the cooling water to cool the surface of the cooling roller 2, so as to cool the composite film. At the same time, the cooling water in the cooling chamber will enter the return pipe 412 through the recovery rod 43, and the cooling water with increased temperature in the return pipe 412 will return to the external cooling equipment from the water outlet 22;

[0043] At the same time, since multiple groups of cooling chambers are provided, and each cooling chamber is connected to an input rod and a recovery rod 43, the cooling water circulation in each cooling chamber is relatively independent, and the cooling water after heat exchange can be recovered in time, thereby avoiding a relative increase in the temperature of the cooling water in the cooling chamber far from the water inlet 21 of the cooling roller 2, resulting in the temperature on the surface of the cooling roller 2 near the water inlet 21 being lower than the temperature on the surface of the cooling roller 2 near the water outlet 22, thereby affecting the cooling effect of the cooling roller 2 on the composite film;

[0044] At the same time, since the center tube 4 is located in the middle of the cooling roller 2 and the center tube 4 does not directly contact the inner wall of the cooling roller 2, the heat exchange between the center tube 4 and the cooling roller 2 is further avoided, and the temperature of the cooling water in the water inlet pipe 411 in the center tube 4 is prevented from rising, resulting in the cooling water temperature in the water inlet pipe 411 near the water outlet 22 end being too high, and causing the temperature of the surface of the cooling roller 2 to be inconsistent, affecting the cooling effect of the composite film and affecting the quality of the composite film extrusion molding;

[0045] At the same time, since pressure valves are installed at the water inlet 21 and the water outlet 22, and the pressure in the water inlet pipe 411 is greater than the pressure in the return pipe 412, the cooling water can effectively fill the cooling chamber, avoiding the presence of air in the cooling chamber or the presence of cooling water in the lower part of the cooling chamber under the action of gravity, which affects the heat exchange between the cooling water and the cooling roller 2. At the same time, the cooling chamber is arranged on the inner wall of the cooling roller 2, and the input rod and the recovery rod 43 are respectively connected to the two ends of the cooling chamber, so that the cooling water can fully flow through various parts of the cooling chamber, thereby improving the heat exchange effect between the cooling water and the cooling roller 2, reducing the use of cooling water, and accelerating the circulation of cooling water. At the same time, it is avoided that the cooling water enters the cooling chamber and leaves the cooling chamber without sufficient circulation, which affects the cooling effect of the cooling roller 2 on the composite film and affects the quality of the extruded composite film.

[0046] As an embodiment of the present invention, a rubber layer 3 is installed in the cooling roller 2, a cooling groove 31 is opened on the rubber layer 3, the cooling groove 31 and the inner wall of the cooling roller 2 are combined to form a cooling cavity, and the conveying rod 42 and the recovery rod 43 are connected to the cooling groove 31;

[0047] The inner wall of the cooling roller 2 is mirror-finished, the inner wall surface of the cooling groove 31 is hydrophobic, and the rubber layer 3 is elastic;

[0048] By installing the rubber layer 3 and opening the cooling groove 31 on the rubber layer 3, the cooling groove 31 and the inner wall of the cooling roller 2 are combined to form a cooling cavity, thereby reducing the processing difficulty of the cooling roller 2. At the same time, since the thermal conductivity of rubber is lower than that of the roller body material of the cooling roller 2, the cooling grooves 31 on the rubber layer 3 are relatively isolated from each other, and the heat exchange between adjacent cooling grooves 31 is reduced, so that the temperature of the cooling water in each cooling cavity is relatively uniform, that is, the temperature of the cooling water in the cooling cavity is low, the heat exchange between the cooling water and the cooling roller 2 is improved, and the temperature of each part of the surface of the cooling roller 2 is relatively uniform, thereby improving the cooling effect of the cooling roller 2 on the composite film, and making the extrusion molding quality of the composite film good;

[0049] At the same time, by controlling the depth of the cooling groove 31, the thickness of the cooling cavity is relatively thin and the amount of cooling water contained therein is small, so that the speed of cooling water passing through the cooling cavity can be accelerated, that is, the circulation speed of cooling water in the cooling cavity is accelerated, so as to ensure that the temperature of the cooling water in the cooling cavity is relatively low, so that the temperature difference between the cooling water in the cooling cavity and the cooling roller 2 is large, and the heat exchange efficiency between the cooling roller 2 and the cooling water is improved, thereby improving the cooling effect of the cooling roller 2 on the composite film;

[0050] At the same time, by performing mirror treatment on the inner wall of the cooling roller 2 and performing hydrophobic treatment on the inner wall surface of the cooling groove 31, the inner wall of the cooling chamber is relatively smooth, thereby avoiding or reducing the possibility of impurities such as scale adhering to the inner wall of the cooling chamber during long-term use, avoiding affecting the heat exchange between the cooling water and the cooling roller 2, and further affecting the cooling effect of the cooling roller 2 on the composite film;

[0051] At the same time, since the rubber layer 3 is elastic and pressure valves are installed at the water inlet 21 and the water outlet 22, during the use of the equipment, the pressure of the cooling water sent into the water inlet pipe 411 by the external cooling equipment is controlled by the controller, so that the pressure in the water inlet pipe 411 fluctuates periodically within a set range, and then the cooling water with periodically changing pressure is used to squeeze the cooling cavity, so that the cooling cavity is slightly deformed, and impurities such as scale that may be attached to the inner wall of the cooling cavity are stirred, thereby promoting the separation of impurities such as scale, avoiding or reducing the adhesion of scale on the inner wall of the cooling cavity, and affecting the cooling effect of the cooling roller 2 on the composite film.

[0052] As an embodiment of the present invention, a partition plate 41 is installed in the central tube 4, and the partition plate 41 isolates the water inlet pipe 411 and the water return pipe 412 from each other. A heat insulation layer is provided inside the partition plate 41 and outside the central tube 4.

[0053] By providing a heat insulating layer in the partition plate 41, the partition plate 41 can fully isolate the water inlet pipe 411 and the water return pipe 412, thereby avoiding heat exchange between the cooling water with a temperature difference flowing in the two, which would cause the cooling water in the water inlet pipe 411 near the water outlet 22 to be relatively hot and overheated, thereby affecting the cooling of the composite film by the cooling roller 2 and affecting the quality of the composite film. At the same time, during the application process, a double-lumen tube can be selected as the central tube 4, and the two cavities inside it can be used as the water inlet pipe 411 and the water return pipe 412 respectively.

[0054] As an embodiment of the present invention, a diverter block 32 is installed in the cooling tank 31, and the length direction of the diverter block 32 is the same as the length direction of the cooling roller 2. The diverter block 32 divides the entrance of the conveying rod 42 in the cooling tank 31 into two parts;

[0055] The diverter block 32 is inclined at one end toward the delivery rod 42, and the cross section of the diverter block 32 is a triangle;

[0056] By setting a diverter block 32 with a triangular cross-section, the cooling water delivered into the cooling chamber by the delivery rod 42 is relatively evenly divided into two parts, so that the cooling water of the two parts can flow along the cooling chamber and finally enter the return water pipe 412 from the recovery rod 43, thereby avoiding that the cooling water delivered into the cooling chamber by the delivery rod 42 is not fully limited in direction when flowing, resulting in different cooling water flow rates in the cooling chambers on both sides of the line between the delivery rod 42 and the recovery rod 43: the cooling water in the cooling chamber on one side circulates normally to the recovery rod 43, and the cooling water in the cooling chamber on the other side flows slowly, or even does not flow in extreme cases, thereby seriously affecting the uniform distribution and uniform flow effect of the cooling water in the cooling chamber, resulting in uneven and unstable heat exchange between the cooling water in the cooling chamber and the cooling roller 2, making the temperature of the surface of the cooling roller 2 inconsistent, affecting the cooling effect of the cooling roller 2 on the composite film and affecting the quality of the composite film extrusion molding.

[0057] As an embodiment of the present invention, a heat sink 33 is installed on the inner wall of the cooling roller 2, the heat sink 33 does not contact the bottom surface of the cooling groove 31, and the heat sink 33 is an annular structure as a whole;

[0058] By installing the heat sink 33, the heat exchange between the cooling water and the cooling roller 2 is increased, thereby improving the cooling effect of the cooling roller 2 and ensuring good quality of the composite film extrusion molding. At the same time, by installing the heat sink 33, the structure of the cooling roller 2 is strengthened, thereby reducing the thickness of the cooling roller 2, that is, the distance from the surface of the cooling roller 2 to the cooling chamber, reducing the weight of the cooling roller 2, and accelerating the speed of heat transfer from the composite film on the surface of the cooling roller 2 to the cooling chamber, thereby improving the heat exchange effect between the cooling roller 2 and the cooling water.

[0059] As an embodiment of the present invention, the interior of the heat sink 33 is a heat pipe structure;

[0060] Since the heat sink 33 has a heat pipe structure inside, the heat in the cooling water at various locations in the cooling chamber is balanced, so that the temperature of the cooling water at various locations in the cooling chamber is relatively consistent, thereby avoiding unstable flow of cooling water in the cooling chamber on both sides of the line between the conveying rod 42 and the recovery rod 43, resulting in a temperature difference in the cooling chamber on both sides of the line between the conveying rod 42 and the recovery rod 43, resulting in inconsistent temperature on the surface of the cooling roller 2, thereby affecting the cooling effect of the cooling roller 2 on the composite film and affecting the quality of extrusion molding of the composite film.

[0061] As an embodiment of the present invention, the cross section of the heat sink 33 is wavy;

[0062] The wavy shape of the heat sink 33 disturbs the cooling water in the cooling chamber, causing the cooling water to be in a turbulent state when flowing, thereby increasing the contact between the cooling water and the inner wall of the cooling chamber, promoting heat exchange between the cooling water and the cooling roller 2, and achieving a good cooling effect on the cooling roller 2, thereby improving the quality of composite film extrusion molding.

[0063] A double-layer co-extrusion cover tape forming process, the process is applicable to any of the double-layer co-extrusion cover tape forming equipment described above, the process comprises the following steps:

[0064] S1: placing the substrate on the unwinder, then pulling the end of the substrate so that the substrate passes through the gluing device, the infrared heating device, the laminating machine, the trimming device and the winding machine in sequence;

[0065] S2: applying AC agent to the surface of the substrate by a coating device, and then drying the applied AC agent by an infrared heating device;

[0066] S3: After the AC-coated substrate enters the compounding machine, the extruder extrudes the second substrate from the extrusion die 12 to form the second substrate, so that the coated second substrate reaches between the silicone roller 11 and the cooling roller 2 in the compounding machine, thereby completing the compounding of the substrate and the second substrate; at the same time, cooling water is introduced into the cooling roller 2 in the compounding machine to quickly and effectively cool and shape the composite film;

[0067] S4: After the composite film material is trimmed by a trimming machine, it is wound up by a winder to obtain the base layer used in the subsequent cover tape production.

[0068] The specific workflow is as follows:

[0069] When the substrate and the second substrate are extruded and composited, the substrate coated with the AC agent and dried enters between the silicone roller 11 and the cooling roller 2 through the guide roller. At the same time, the second substrate extruded from the extrusion die 12 of the extruder also reaches between the silicone roller 11 and the cooling roller 2, so that the substrate and the second substrate are extruded and composited under the extrusion force of the silicone roller 11 and the bonding effect of the AC agent. At the same time, the composite film after molding moves with the rotation of the cooling roller 2, and the composite film is peeled off from the cooling roller 2 at the peeling roller 13, and then enters the subsequent trimming process under the action of the guide roller.

[0070] At the same time, the external cooling equipment delivers cooling water from the water inlet 21 to the inside of the cooling roller 2, and then the cooling water enters the cooling chamber from the delivery rod 42, and uses the relatively low temperature of the cooling water to cool the surface of the cooling roller 2, so as to cool the composite film. At the same time, the cooling water in the cooling chamber will enter the return pipe 412 through the recovery rod 43, and the cooling water with increased temperature in the return pipe 412 will return to the external cooling equipment from the water outlet 22;

[0071] At the same time, since multiple groups of cooling chambers are provided, and each cooling chamber is connected to an input rod and a recovery rod 43, the cooling water circulation in each cooling chamber is relatively independent, and the cooling water after heat exchange is recovered in time;

[0072] At the same time, since pressure valves are installed at the water inlet 21 and the water outlet 22, and the pressure in the water inlet pipe 411 is greater than the pressure in the water return pipe 412, the cooling water can effectively fill the cooling cavity. At the same time, the cooling cavity is arranged on the inner wall of the cooling roller 2, and the input rod and the recovery rod 43 are respectively connected to the two ends of the cooling cavity, so that the cooling water can fully flow through all parts of the cooling cavity, and at the same time, it is prevented that the cooling water leaves the cooling cavity without being fully circulated after entering the cooling cavity.

[0073] By installing the rubber layer 3 and opening the cooling groove 31 on the rubber layer 3, the cooling groove 31 and the inner wall of the cooling roller 2 are combined to form a cooling cavity, which reduces the processing difficulty of the cooling roller 2 and reduces the heat exchange between adjacent cooling grooves 31, so that the cooling water temperature in each cooling cavity is relatively uniform, that is, the cooling water temperature in the cooling cavity is relatively low;

[0074] At the same time, by controlling the depth of the cooling groove 31, the thickness of the cooling cavity is relatively thin, the amount of cooling water contained inside is small, and the speed of cooling water passing through the cooling cavity is accelerated, that is, the circulation speed of cooling water in the cooling cavity is accelerated;

[0075] At the same time, by performing mirror treatment on the inner wall of the cooling roller 2 and performing hydrophobic treatment on the inner wall surface of the cooling groove 31, the inner wall of the cooling cavity is relatively smooth, thereby avoiding or reducing the possibility of impurities such as scale adhering to the inner wall of the cooling cavity during long-term use;

[0076] At the same time, since the rubber layer 3 is elastic and pressure valves are installed at the water inlet 21 and the water outlet 22, during the use of the equipment, the pressure of the cooling water sent into the water inlet pipe 411 by the external cooling equipment is controlled by the controller, so that the pressure in the water inlet pipe 411 fluctuates periodically within a set range, and then the cooling water with periodically changing pressure is used to squeeze the cooling cavity, so that the cooling cavity is slightly deformed, and impurities such as scale that may be attached to the inner wall of the cooling cavity are stirred, so as to promote the separation of impurities such as scale, and avoid or reduce the adhesion of scale on the inner wall of the cooling cavity;

[0077] By providing a heat insulation layer in the partition plate 41, the partition plate 41 can fully isolate the water inlet pipe 411 and the water return pipe 412, thereby preventing heat exchange between the cooling water flowing in the two pipes with a temperature difference, which may cause the cooling water in the water inlet pipe 411 near the water outlet 22 to be relatively heated and overheated.

[0078] By providing a diverter block 32 with a triangular cross section, the cooling water delivered into the cooling chamber by the delivery rod 42 is relatively evenly divided into two parts, so that both parts of the cooling water can flow along the cooling chamber and finally enter the return pipe 412 from the recovery rod 43;

[0079] The heat exchange between the cooling water and the cooling roller 2 is increased by installing the heat sink 33. At the same time, the structure of the cooling roller 2 is strengthened by installing the heat sink 33, so that the thickness of the cooling roller 2, that is, the distance from the surface of the cooling roller 2 to the cooling chamber, can be reduced, so that the weight of the cooling roller 2 is reduced, and the speed of heat transfer from the composite film on the surface of the cooling roller 2 to the cooling chamber is accelerated;

[0080] Since the heat sink 33 has a heat pipe structure inside, the heat in the cooling water at various locations in the cooling cavity is balanced, so that the temperature of the cooling water at various locations in the cooling cavity is relatively consistent;

[0081] The cooling water in the cooling chamber is disturbed by the wave shape of the heat sink 33 , so that the cooling water is in a turbulent state when flowing, thereby increasing the contact between the cooling water and the inner wall of the cooling chamber and promoting heat exchange between the cooling water and the cooling roller 2 .

[0082] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A double-layer co-extrusion cover tape forming device, comprising a compound machine, the compound machine comprising a frame (1), a silicone roller (11), a cooling roller (2) and a peeling roller (13) are sequentially mounted on the frame (1) from right to left, an extrusion die head (12) of an extruder is placed between the silicone roller (11) and the cooling roller (2), and a water inlet (21) and a water outlet (22) are respectively arranged at both ends of the cooling roller (2); Features: A cooling cavity is provided on the inner wall of the cooling roller (2), a central tube (4) is installed in the cooling roller (2), a water inlet pipe (411) and a water return pipe (412) are installed in the central tube (4), the water inlet pipe (411) is connected to the water inlet (21), the water return pipe (412) is connected to the water outlet (22), a conveying rod (42) is installed between the water inlet pipe (411) and the cooling cavity, a recovery rod (43) is installed between the water return pipe (412) and the cooling cavity, and the cooling water in the water inlet pipe (411) passes through the conveying rod (42), the cooling cavity, and the recovery rod (43) in sequence before entering the water return pipe (412); The cooling chamber is in a circular shape, and is provided with a plurality of groups of cooling chambers. The cooling chambers are not connected to each other. Pressure valves are installed at the water inlet (21) and the water outlet (22). The pressure in the water inlet pipe (411) is greater than the pressure in the water return pipe (412). A rubber layer (3) is installed inside the cooling roller (2), a cooling groove (31) is provided on the rubber layer (3), the cooling groove (31) and the inner wall of the cooling roller (2) are combined to form a cooling cavity, and the conveying rod (42) and the recovery rod (43) are connected to the cooling groove (31); The inner wall of the cooling roller (2) is subjected to mirror surface treatment, the inner wall surface of the cooling groove (31) is subjected to hydrophobic treatment, and the rubber layer (3) has elasticity; A partition plate (41) is installed in the central tube (4), and the partition plate (41) separates the water inlet pipe (411) and the water return pipe (412) from each other. A heat insulation layer is provided inside the partition plate (41) and outside the central tube (4); A diverter block (32) is installed in the cooling trough (31), the length direction of the diverter block (32) is the same as the length direction of the cooling roller (2), and the diverter block (32) divides the entrance of the conveying rod (42) in the cooling trough (31) into two parts; One end of the diverter block (32) is inclined toward the delivery rod (42), and the cross section of the diverter block (32) is triangular.

2. The double-layer co-extrusion cover tape forming device according to claim 1, characterized in that: A heat sink (33) is installed on the inner wall of the cooling roller (2); the heat sink (33) does not contact the bottom surface of the cooling groove (31); and the heat sink (33) is an annular structure as a whole.

3. The double-layer co-extrusion cover tape forming device according to claim 2, characterized in that: The interior of the heat sink (33) is a heat pipe structure.

4. The double-layer co-extrusion cover tape forming device according to claim 2, characterized in that: The cross section of the heat sink (33) is wavy.

5. A double-layer co-extrusion cover tape process, characterized in that: The process is applicable to a double-layer co-extrusion cover tape forming device as described in any one of claims 1 to 4 above, and the process comprises the following steps: S1: placing the substrate on the unwinder, then pulling the end of the substrate so that the substrate passes through the gluing device, the infrared heating device, the laminating machine, the trimming device and the winding machine in sequence; S2: applying AC agent to the surface of the substrate by a coating device, and then drying the applied AC agent by an infrared heating device; S3: After the substrate coated with the AC agent enters the compounding machine, the extruder extrude the second substrate from the extrusion die head (12) to form the second substrate, so that the coated second substrate reaches between the silicone roller (11) and the cooling roller (2) in the compounding machine, thereby completing the compounding of the substrate and the second substrate; at the same time, cooling water is passed into the cooling roller (2) in the compounding machine to quickly and effectively cool and shape the composite film; S4: After the composite film material is trimmed by a trimming machine, it is wound up by a winder to obtain the base layer used in the subsequent cover tape production.

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