CN114536706A - EVA plastic film extruder - Google Patents

Abstract

The invention relates to the technical field of film extruders, in particular to an EVA plastic film extruder which comprises a case, wherein a control panel and a processing pipeline are installed on the case, a feeding funnel is installed on the top wall of the processing pipeline, a worm is horizontally and rotatably installed in the processing pipeline, a pressurizing box is installed at one end of the processing pipeline, a plurality of radiating holes are respectively formed in the top wall and the bottom wall of the pressurizing box, an installation block is installed on the side wall of the pressurizing box, a shaping mold extending into the pressurizing box is horizontally inserted into the side wall of the installation block, two cavities are formed in the installation block, and first baffles extending into the cavities are vertically and movably inserted into the top wall and the bottom wall of the shaping mold. According to the invention, the shaping die is blocked by the first baffle, so that the phenomenon that fluffy materials in the shaping die directly flow out of the shaping die to cause the uneven edge of a film which is just produced and needs to be removed for secondary processing can be prevented.

Description

An EVA plastic film extruder

technical field

The invention relates to the technical field of film extruders, in particular to an EVA plastic film extruder.

Background technique

In the plastic extrusion molding equipment, the plastic extruder is usually called the main machine, and the subsequent equipment plastic extrusion molding machine is called the auxiliary machine. After more than 100 years of development, plastic extruders have been derived from the original single-screw, twin-screw, multi-screw, and even no-screw models. Plastic extruder (main machine) can be used with various plastic forming auxiliary machines such as pipe, film, holding material, monofilament, flat wire, packing belt, extruding mesh, plate (sheet) material, profiled material, granulation, cable coating and so on. Match to form various plastic extrusion molding production lines to produce various plastic products. Therefore, plastic extrusion molding machinery is one of the widely used models in the plastic processing industry, now or in the future.

However, when the film extruder on the market first starts to work, usually due to the uneven distribution of the molten material extruded into the molding die, there will be a period of waste when the material is first discharged. At the same time, there is air in the die. , the molten material is easy to wrap the air in the flow, which will cause the product to be produced at the beginning to contain air bubbles, so that the product is unqualified.

To this end, an EVA plastic film extruder is proposed.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a kind of EVA plastic film extruder, to solve the problem that the edge of the product produced when the film extruder just started to run in the above-mentioned background technology is irregular or the product contains air bubbles and causes the problem of unqualified products.

To achieve the above object, the present invention provides the following technical solutions:

An EVA plastic film extruder, including a case, a control panel and a processing pipe are installed on the case, a feeding funnel is installed on the top wall of the processing pipe, and a worm is installed horizontally in the processing pipe, so the One end of the processing pipeline is installed with a pressurized box, the top wall and the bottom wall of the pressurized box are provided with a plurality of heat dissipation ports, and a mounting block is installed on the side wall of the pressurized box, and the A plastic mold extending into the pressurized box is horizontally inserted on the side wall, two cavities are opened on the mounting block, and the top wall and the bottom wall of the plastic mold are vertically movably inserted with extending To the first baffle in the cavity, one end of each of the first baffles located in the cavity is vertically installed with a first insertion rod, and a side wall of each cavity is provided with extending to The circular holes in the pressurizing box, each of the circular holes is horizontally and movably equipped with a pressure plate, and each of the pressure plates is horizontally fixed and installed with a card plate extending into the cavity, and each of the card plates is horizontally and fixedly installed. Each of the first insertion rods is provided with a socket adapted to the first insertion rod, a mounting plate is installed horizontally on each of the first insertion rods, and a memory alloy extending to the inner wall of the molding die is installed on each of the installation plates. A telescopic plate is hinged on the inner top wall and the inner bottom wall of the pressurized box, and a cylinder for driving the telescopic plate to rotate is vertically installed on the top wall and the bottom wall of the pressurized box. Two air chambers connected to the air inlet of the cylinder are installed vertically. Electric heating wires are wound on the outer walls of the air chambers, and a protective sleeve is provided on the outer wall of the heating wire. Trigger mechanism for warming;

The trigger mechanism includes a second baffle plate installed on the inner wall of the protective sleeve, a heat-conducting plate is movably arranged in the protective sleeve, and a top wall of the heat-conducting plate is vertically installed with a top wall extending to the second baffle plate. The top end of the first push rod is provided with a heat shield, and the diameter of the heat shield is larger than the inner diameter of the second baffle and smaller than the outer diameter of the second baffle.

During the working process, the molten material is first squeezed into the pressurized box by the worm. When the pressurized box is filled with materials, the worm is still transporting the material into the pressurized box, so the pressure in the pressurized box increases. At this time, the heat-conducting plate is squeezed by the material and slides upward along the inner wall of the protective sleeve. During the upward sliding of the heat-conducting plate, the first push rod vertically installed on the top wall drives the heat-insulating plate and the protective sleeve. The second baffle with heat insulation effect is out of contact, so that the temperature in the pressurized box can be transferred to the protective sleeve, and the temperature in the air chamber can be raised by heat conduction. At the same time, under the action of the electric heating wire, The temperature in the air chamber can rise rapidly, so as to drive the cylinder, so that the cylinder drives the telescopic plate to rotate. During the rotation of the telescopic plate, the material in the pressurized box can be squeezed, so that the contact between the materials is closer. At the same time, during the rotation of the telescopic plate, the materials are squeezed, so that the gas mixed between the materials can pass through the upper plate of the nano-material and flow out through the air holes on the pressurized box, thus preventing the gas mixed between the materials from causing the film. The effect of quality reduction, when the pressure in the pressurized box is large enough, the pressure plate will be squeezed and slide along the circular hole, and the card plate will be driven to move in the first cavity during the sliding process of the pressure plate. At the same time, the memory alloy is heated and has Therefore, during the movement of the card board, if the socket on the card board is just above the first insertion rod, the memory alloy will push the mounting plate to drive the first insertion rod into the socket. , when the first plunger is pushed, it drives the first baffle to retract into the first cavity, so the first baffle can be automatically opened when the pressure is large enough, which prevents the first baffle from being caused by the existence of a gap in the plastic mold. The role of waste is prone to occur during production.

Preferably, a partition plate is installed vertically in both of the two cylinders, the partition plate divides the cylinder into a third cavity and a fourth cavity, and the third cavity and the fourth cavity are respectively movably arranged There are a first piston plate and a second piston plate, a second spring is arranged between the first piston plate and the inner wall of the cylinder, and a second push rod extending to the surface of the upper plate is vertically mounted on the second piston plate.

When the pressure in the air chamber increases, the first piston plate will be pushed up, move up along the third cavity, and squeeze the second spring, during the process of the first piston plate moving, the second piston plate will The second push rod is driven to move down along the fourth cavity, and in the process of the second push rod moving down, the telescopic plate is pushed to rotate, which plays the role of driving the telescopic plate to pressurize the material again.

Preferably, the telescopic plate includes an upper plate made of magnet material, a groove is formed on the upper plate, a linkage rod is movably arranged in the groove, and one end of the linkage rod is fixedly installed with the upper plate The bottom wall is a nano-material lower plate, and one end of the linkage rod is installed with a first spring connected with the groove.

In the initial state, the side walls of the upper plate and the lower plate are in contact with the inner wall of the pressurized box, and since the first spring pushes the lower plate, during the rotation of the telescopic plate, the lower plate can always be in contact with the inner wall of the pressurized box. The inner wall is in contact, so that the material can be prevented from overflowing into the cavity formed between the telescopic plate and the pressurized box, which ensures that the telescopic plate can squeeze the material during the rotation to make the material in close contact. Then the material continues to enter the pressurized box. Therefore, the temperature in the pressurized box gradually decreases, and the temperature in the air chamber decreases, so the pressure decreases. Under the combined action of the pressure and the second spring, the first piston plate moves along the The three chambers move down, resulting in a negative pressure state in the third chamber. Therefore, the second piston plate drives the second push rod to move up to balance the pressure. At this time, the second push rod no longer exerts pressure on the upper plate, and because the upper plate is The magnet material, after the two upper plates are not subject to external pressure, under the action of the magnetic force, the two upper plates will repel each other, thus returning to the initial state.

Preferably, piezoelectric ceramics connected in series with the heating wire are fixedly installed on the inner wall of the processing pipe, and an impact rod having the same length as the inner diameter of the processing pipe is vertically installed at one end of the worm.

During the rotation of the worm, the impact rod installed at one end and perpendicular to it rotates along with it, and the impact force when the impact rod is in contact with the piezoelectric ceramic is used to trigger the piezoelectric ceramic to generate electricity, which plays the role of supplying power to the heating wire and generating heat.

Preferably, two second insertion rods connected to the heat insulation board are vertically movably inserted on the bottom wall of the air chamber, and the top ends of the two second insertion rods are jointly installed with a movable configuration in the air chamber. push plate.

When the heat-conducting plate is squeezed and moved upward by the material, it will drive the second plunger to move up, and the second plunger will move up to push the push plate to move up, which increases the pressure in the air chamber and can assist the first piston plate Moving up, it has the effect of increasing the thrust of the second push rod.

Preferably, an air bag is installed on the push plate, and the air bag is filled with ammonia gas.

Due to the large expansion coefficient of ammonia gas, when the temperature in the gas chamber increases, the volume expanded by ammonia gas is larger than that when the gas chamber is filled with air, so it can more effectively increase the volume of gas in the gas chamber At the same time, the ammonia gas is installed in the air bag to ensure that the ammonia gas will not leak into the air and pollute the air.

Compared with the prior art, the beneficial effects of the present invention are:

1. When the device first starts to work, the first baffle is used to block the molding die, which can prevent the fluffy material in the molding die from flowing out of the molding die directly, resulting in uneven edges of the film at the beginning of production. As for the need to reduce the occurrence of the phenomenon of reprocessing.

2. When the pressurized box is full of materials, the processing pipeline continues to transport materials to the pressurized box, so the heat-conducting plate is pushed up by the material, so that the heat insulation plate and the second baffle are out of contact, so that the temperature in the pressurized box is increased. It can be transmitted to the air chamber by thermal radiation, so that the gas in the air chamber is heated and expanded, and the pressure in the cylinder connected to the air chamber can be increased, so that the second push rod is used to push the telescopic plate, and the telescopic plate is used to squeeze the material. , make the material more compact, and when the material is squeezed, the gas in it can be discharged into the air through the nano-material upper plate and the air holes on the pressurized box.

3. Since the first spring pushes the upper plate, during the rotation of the telescopic plate, the upper plate is always in contact with the inner wall of the pressurized box, thereby preventing the material from overflowing into the cavity formed between the telescopic plate and the pressurized box , plays the role of ensuring that the telescopic plate can squeeze the material to make the material in close contact during the rotation process.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the combination diagram of middle packing and processing pipeline of the present invention;

3 is a cross-sectional view of the present invention;

Fig. 4 is the enlarged view of the present invention A;

Fig. 5 is the enlarged view of the present invention B;

Fig. 6 is the combination diagram of the lower plate and the upper plate of the present invention;

Fig. 7 is a cross-sectional view of the upper plate of the present invention.

In the figure: 1. Chassis; 2. Control panel; 3. Processing pipeline; 4. Feeding funnel; 5. Worm; 6. Pressurized box; 7. Installation block; 8. Molding mold; 9. First baffle ; 10, the first insertion rod; 11, the pressure plate; 12, the card plate; 13, the installation plate; 14, the memory alloy; 15, the telescopic plate; 1501, the upper plate; 1502, the first spring; 1503, the lower plate; Linkage rod; 16, cylinder; 17, air chamber; 18, heating wire; 19, protective sleeve; 20, second baffle plate; 21, heat conduction plate; 22, first push rod; 23, heat shield; 24 25, push plate; 26, air bag; 27, partition plate; 28, first piston plate; 29, second piston plate; 30, second spring; 31, second push rod; 32, pressure Electric ceramics; 33. Impact rod.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "top", "bottom", "front", " Rear", "Left", "Right", "Straight", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise" etc. The positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as "first", "second" may expressly or implicitly include one or more of said features. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be It is directly connected, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Please refer to Fig. 1 to Fig. 7, the present invention provides a kind of EVA plastic film extruder, the technical scheme is as follows:

An EVA plastic film extruder includes a case 1, a control panel 2 and a processing pipe 3 are installed on the case 1, a feeding funnel 4 is installed on the top wall of the processing pipe 3, and a worm 5 is installed horizontally in the processing pipe 3. One end of the processing pipeline 3 is installed with a pressurized box 6, the top wall and the bottom wall of the pressurized box 6 are provided with a plurality of heat dissipation ports, and a mounting block 7 is installed on the side wall of the pressurized box 6. The side wall is horizontally inserted with a plastic mold 8 extending into the pressurized box 6, the mounting block 7 is provided with two cavities, and the top wall and the bottom wall of the plastic mold 8 are vertically movably inserted with extensions. To the first baffle plate 9 in the cavity, one end of each first baffle plate 9 located in the cavity is vertically installed with a first insertion rod 10, and a side wall of each cavity is provided with extending to the plus side. The circular holes in the pressure box 6, each of which is horizontally and movably equipped with a pressure plate 11, each pressure plate 11 is horizontally fixedly installed with a card plate 12 extending into the cavity, and each card plate 12 is provided with There is a socket adapted to the first insertion rod 10, a mounting plate 13 is installed horizontally on each first insertion rod 10, and a memory alloy 14 extending to the inner wall of the molding die 8 is installed on each mounting plate 13, A telescopic plate 15 is hinged on the inner top wall and inner bottom wall of the pressurizing box 6 , and a cylinder 16 for driving the telescopic plate 15 to rotate is vertically installed on the top wall and the bottom wall of the pressurizing box 6 . Two air chambers 17 connected to the air inlet of the cylinder 16 are vertically installed, and an electric heating wire 18 is wound on the outer wall of the air chamber 17. The outer wall of the electric heating wire 18 is provided with a protective sleeve 19. Trigger mechanism for warming up of cabin 17;

The trigger mechanism includes a second baffle plate 20 installed on the inner wall of the protective sleeve 19 , a heat-conducting plate 21 is movably arranged in the protective sleeve 19 , and a top wall of the heat-conducting plate 21 is vertically installed to extend to the top wall of the second baffle plate 20 . The top of the first push rod 22 is provided with a heat shield 23 , the diameter of the heat shield 23 is larger than the inner diameter of the second baffle 20 and smaller than the outer diameter of the second baffle 20 .

In the working process, the device is first debugged through the control panel 2, and then the raw materials are poured into the feeding funnel 4, so that the raw materials enter the processing pipeline 3 through the feeding funnel 4 to be processed, and the molten material in the processing pipeline 3 is first It is squeezed into the pressurizing box 6 by the worm 5. When the pressurizing box 6 is full of materials, since the worm 5 is still transporting materials to the pressurizing box 6, the pressure in the pressurizing box 6 increases. The heat-conducting plate 21 is squeezed by the material and slides upward along the inner wall of the protective sleeve 19. During the upward sliding of the heat-conducting plate 21, the heat-insulating plate 23 is driven by the first push rod 22 vertically installed on the top wall of the heat-conducting plate 21. The second baffle plate 20 with heat insulation effect is out of contact, so that the temperature in the pressurized box 6 can be transferred to the protective sleeve 19, and the temperature in the air chamber 17 is increased by means of heat conduction. Under the action of the wire 18, the temperature in the air chamber 17 can be rapidly increased, thereby driving the air cylinder 16, so that the air cylinder 16 drives the telescopic plate 15 to rotate. materials, so as to make the contact between the materials tighter. At the same time, during the rotation of the telescopic plate 15, the materials are squeezed, so that the gas mixed between the materials can pass through the nano-material upper plate 1501 and pass through the pressurized box 6. When the pressure in the pressurizing box 6 is large enough, the pressing plate 11 will be squeezed and slide along the circular hole, and the pressure plate 11 will slide on the During the process, the card plate 12 is driven to move in the first cavity, and at the same time, the memory alloy 14 tends to stretch when heated. Therefore, during the movement of the card plate 12, if the socket on the card plate 12 is just in the first insertion rod 10 Just above the mounting plate 13, the memory alloy 14 will drive the first insertion rod 10 to be inserted into the socket. When the first insertion rod 10 is pushed, it will drive the first baffle plate 9 to retract into the first cavity. , so the first baffle plate 9 can be automatically opened when the pressure is large enough, which plays the role of preventing the occurrence of scraps at the beginning of production due to the existence of voids in the molding die 8 .

As an embodiment of the present invention, referring to FIG. 3 , a partition plate 27 is vertically installed in the two cylinders 16 , and the partition plate 27 divides the cylinder 16 into a third cavity and a fourth cavity. The third cavity and the A first piston plate 28 and a second piston plate 29 are respectively movably arranged in the fourth cavity, a second spring 30 is arranged between the first piston plate 28 and the inner wall of the cylinder 16, and an extension is vertically installed on the second piston plate 29. to the second push rod 31 on the surface of the upper plate 1501 .

When the pressure in the air chamber 17 increases, the first piston plate 28 will be pushed upward, move up along the third cavity, and squeeze the second spring 30. During the upward movement of the first piston plate 28, the first piston plate 28 will move upward. The second piston plate 29 will drive the second push rod 31 to move down along the fourth cavity. During the process of the second push rod 31 moving down, it will push the telescopic plate 15 to rotate, so as to drive the telescopic plate 15 to pressurize the material again. effect.

As an embodiment of the present invention, referring to FIG. 7 , the telescopic plate 15 includes an upper plate 1501 made of magnet material, a groove is formed on the upper plate 1501, and a linkage rod 1504 is movably arranged in the groove. One end of the lower plate 1503 of nano-material is fixedly installed with the bottom wall of the upper plate 1501, and one end of the linkage rod 1504 is installed with a first spring 1502 connected to the groove.

In the initial state, the side walls of the upper plate 1501 and the lower plate 1503 are in contact with the inner wall of the pressurized box 6, and since the first spring 1502 pushes the lower plate 1503, during the rotation of the telescopic plate 15, the lower plate 1503 It can always be in contact with the inner wall of the pressurized box 6, thereby preventing the material from overflowing into the cavity formed between the telescopic plate 15 and the pressurized box 6, and ensuring that the telescopic plate 15 can squeeze the material during the rotation process. The effect of close contact, when the use is over, no more materials continue to enter the pressurized box 6, therefore, the temperature in the pressurized box 6 gradually decreases, and the temperature in the air chamber 17 decreases, so the pressure decreases. Under the combined action of the two springs 30, the first piston plate 28 moves down along the third cavity, resulting in a negative pressure state in the third cavity. Therefore, the second piston plate 29 drives the second push rod 31 to move upward to balance the pressure. At this time, the second push rod 31 no longer exerts pressure on the upper plate 1501, and because the upper plate 1501 is made of magnets, after the two upper plates 1501 are not subject to external pressure, under the action of the magnetic force, the two upper plates 1501 will repel each other, thus returning to the initial state.

As an embodiment of the present invention, referring to FIG. 3 , the inner wall of the processing pipe 3 is fixedly installed with a piezoelectric ceramic 32 connected in series with the heating wire 18 , and one end of the worm 5 is vertically installed with an impact with the same length as the inner diameter of the processing pipe 3 . Stick 33.

During the rotation of the worm 5, the impact rod 33 installed at one end and perpendicular to it rotates, and the impact force when the impact rod 33 is in contact with the piezoelectric ceramic 32 is used to trigger the piezoelectric ceramic 32 to generate electricity, which acts as a generator for the heating wire 18 The role of power supply heating.

As an embodiment of the present invention, referring to FIG. 5 , two second insertion rods 24 connected to the heat insulation board 23 are vertically movably inserted on the bottom wall of the air chamber 17 , and the top ends of the two second insertion rods 24 A push plate 25 which is movably arranged in the air chamber 17 is mounted together.

When the heat-conducting plate 21 is squeezed and moved upward by the material, it will drive the second insertion rod 24 to move up, and the second insertion rod 24 moves upward to push the push plate 25 to move up, which increases the pressure in the air chamber 17 and can Assisting the first piston plate 28 to move upward plays the role of increasing the thrust of the second push rod 31 .

As an embodiment of the present invention, referring to FIG. 5 , an airbag 26 is installed on the push plate 25 , and the airbag 26 is filled with ammonia gas.

Due to the large expansion coefficient of ammonia gas, when the temperature in the gas chamber 17 increases, the volume expanded by the ammonia gas is larger than when the gas chamber 17 is filled with air, so the gas chamber can be enlarged more effectively 17, and at the same time, the ammonia gas is installed in the air bag 26, which plays a role of ensuring that the ammonia gas will not leak into the air and pollute the air.

Working principle: During the working process, the device is first debugged through the control panel 2, and then the raw materials are poured into the feeding funnel 4, so that the raw materials enter the processing pipeline 3 through the feeding funnel 4 for processing, and the molten state in the processing pipeline 3 The material is first squeezed into the pressurized box 6 by the worm 5. When the pressurized box 6 is filled with materials, since the worm 5 is still conveying the material to the pressurized box 6, the pressure in the pressurized box 6 increases. , at this time, the heat-conducting plate 21 is squeezed by the material and slides upward along the inner wall of the protective sleeve 19. During the upward sliding of the heat-conducting plate 21, the heat insulation is driven by the first push rod 22 vertically installed on its top wall. The plate 23 is out of contact with the second baffle plate 20 with a heat insulating effect, so that the temperature in the pressurized box 6 can be transferred to the protective sleeve 19, and the temperature in the air chamber 17 can be raised by means of heat conduction, and at the same time , during the rotation of the worm 5, the impact rod 33 installed at one end and perpendicular to it rotates, and the impact force when the impact rod 33 is in contact with the piezoelectric ceramic 32 is used to trigger the piezoelectric ceramic 32 to generate electricity, which serves as a heating wire. 18 The function of power supply and heating, under the action of the heating wire 18, the temperature in the air chamber 17 can be rapidly increased, so that the pressure in the air chamber 17 increases, and when the pressurized box 6 is filled with materials, the heat conduction plate 21 will be squeezed by the material to move upward and drive the second plunger 24 to move up, and push the push plate 25 to move up through the second plunger 24 moving upward, and because the expansion coefficient of ammonia is large, the temperature in the gas chamber 17 is high. When raised, the ammonia gas expands more volume than filling the air chamber 17 with air, so the pressure in the air chamber 17 can be increased more effectively, while the ammonia gas is loaded in the air bag 26 , plays the role of ensuring that the ammonia gas will not leak into the air and pollute the air. When the pressure in the air chamber 17 increases, the first piston plate 28 will be pushed up, move up along the third cavity, and squeeze the first piston plate 28. Two springs 30, during the upward movement of the first piston plate 28, the second piston plate 29 will drive the second push rod 31 to move down along the fourth cavity, and during the downward movement of the second push rod 31, it will push the second push rod 31 downward. The rotation of the telescopic plate 15 plays the role of driving the telescopic plate 15 to pressurize the material again. During the rotation of the telescopic plate 15, the material in the pressurizing box 6 can be squeezed, so that the contact between the materials is closer. Because in the initial state, the side walls of the upper plate 1501 and the lower plate 1503 are both in contact with the inner wall of the pressurized box 6, and since the first spring 1502 pushes the lower plate 1503, during the rotation of the telescopic plate 15, the lower plate 1503 can always be in contact with the inner wall of the pressurized box 6, so as to prevent the material from overflowing into the cavity formed between the telescopic plate 15 and the pressurized box 6, so as to ensure that the telescopic plate 15 can squeeze the material during the rotation process. Due to the close contact of the materials, when the use is over, no more materials continue to enter the pressurized box 6. Therefore, the temperature in the pressurized box 6 gradually decreases, and the temperature in the air chamber 17 decreases, so the pressure decreases. Under the combined action of the second spring 30, the first piston plate 28 moves down along the third cavity, resulting in a negative pressure state in the third cavity, Therefore, the second piston plate 29 drives the second push rod 31 to move upward to balance the pressure. At this time, the second push rod 31 no longer exerts pressure on the upper plate 1501, and since the upper plate 1501 is made of magnets, the two upper plates 1501 do not have any pressure. After being subjected to external pressure, under the action of magnetic force, the two upper plates 1501 will repel each other, thereby returning to the initial state, and at the same time, the gas mixed between the materials can pass through the nano-material upper plate 1501 and pass through the pressurized box. The air holes on 6 will flow out, thus preventing the film quality from being degraded due to the inclusion of gas between the materials. When the pressure in the pressurizing box 6 is large enough, the pressing plate 11 will be squeezed and slide along the circular hole. During the sliding process, the card board 12 is driven to move in the first cavity, and at the same time, the memory alloy 14 tends to stretch when heated. Just above the rod 10, the memory alloy 14 will push the mounting plate 13 to drive the first insertion rod 10 to be inserted into the socket. When the first insertion rod 10 is pushed, it will drive the first baffle 9 to retract into the first cavity Therefore, when the pressure is large enough, the first baffle plate 9 can be automatically opened, which plays the role of preventing wastes from easily occurring at the beginning of production due to the existence of voids in the molding die 8 .

The electrical components appearing in this article are all connected to the external main controller and 220V mains electricity through transformers, and the main controller can be a conventional known device controlled by a computer or the like, and the product model provided by the present invention is only for this technology. The scheme is used according to the structural characteristics of the product, and the product will be adjusted and transformed after purchase to make it more compatible and in line with the technical scheme of the present invention, which is a technical scheme of the best application of the technical scheme, and the model of the product. It can be replaced and transformed according to its required technical parameters, which are well known to those skilled in the art, therefore, those skilled in the art can clearly obtain corresponding use effects through the technical solutions provided by the present invention.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. The utility model provides a EVA plastic film extruder, includes quick-witted case (1), install control panel (2) and processing pipeline (3) on quick-witted case (1), install feed hopper (4), its characterized in that on the roof of processing pipeline (3): a worm (5) is horizontally installed in the processing pipeline (3) in a rotating manner, a pressurizing box (6) is installed at one end of the processing pipeline (3), a plurality of heat dissipation ports are formed in the top wall and the bottom wall of the pressurizing box (6), an installation block (7) is installed on the side wall of the pressurizing box (6), a shaping mold (8) extending into the pressurizing box (6) is horizontally inserted into the side wall of the installation block (7), two cavities are formed in the installation block (7), first baffles (9) extending into the cavities are vertically inserted into the top wall and the bottom wall of the shaping mold (8) in a movable manner, a first inserting rod (10) is vertically installed at one end, located in each cavity, of each first baffle (9), a round hole extending into the pressurizing box (6) is formed in the side wall of each cavity, and a movable pressing plate (11) is horizontally arranged in each round hole, each pressing plate (11) is horizontally and fixedly provided with a clamping plate (12) extending into the cavity, each clamping plate (12) is provided with a jack matched with the first inserted bar (10), each first inserted bar (10) is horizontally provided with a mounting plate (13), each mounting plate (13) is provided with a memory alloy (14) extending to the inner wall of the shaping mold (8), the inner top wall and the inner bottom wall of the pressurizing box (6) are hinged with expansion plates (15), the top wall and the bottom wall of the pressurizing box (6) are vertically provided with cylinders (16) for driving the expansion plates (15) to rotate, two air chambers (17) connected with air inlets of the cylinders (16) are vertically arranged in the pressurizing box (6), the outer wall of each air chamber (17) is wound with an electric heating wire (18), and a protective sleeve (19) is sleeved outside each electric heating wire (18), a trigger mechanism for triggering the temperature rise of the air chamber (17) is arranged on the protective sleeve (19);

trigger mechanism is including installing second baffle (20) at protection sleeve (19) inner wall, the activity has set heat-conducting plate (21) in protection sleeve (19), vertically install first push rod (22) that extend to second baffle (20) roof on the roof of heat-conducting plate (21), heat insulating board (23) are installed on the top of first push rod (22), the diameter of heat insulating board (23) is greater than the internal diameter of second baffle (20) and is less than the external diameter of second baffle (20).

2. The EVA plastic film extruder of claim 1, wherein: two equal vertical baffle (27) of installing in cylinder (16), baffle (27) divide into third cavity and fourth cavity with cylinder (16), the activity respectively has set first piston board (28) and second piston board (29) in third cavity and the fourth cavity, be equipped with first spring (1502) between first piston board (28) and cylinder (16) inner wall, vertical second push rod (31) that extend to supreme board (1501) surface of installing on second piston board (29).

3. The EVA plastic film extruder of claim 1, wherein: the expansion plate (15) includes upper plate (1501) of magnet material, seted up the recess on upper plate (1501), the activity has set trace (1504) in the recess, the one end fixed mounting of trace (1504) has lower board (1503) of the nanometer material of laminating with upper plate (1501) diapire, the one end of trace (1504) is installed and is connected with first spring (1502) of recess.

4. The EVA plastic film extruder of claim 1, wherein: the inner wall of the processing pipeline (3) is fixedly provided with piezoelectric ceramics (32) connected with the heating wire (18) in series, and one end of the worm (5) is vertically provided with an impact rod (33) which has the same length as the inner diameter of the processing pipeline (3).

5. The EVA plastic film extruder of claim 1, wherein: two second inserting rods (24) connected with the heat insulation plate (23) are vertically and movably inserted into the bottom wall of the air chamber (17), and a push plate (25) movably arranged in the air chamber (17) is mounted at the top ends of the two second inserting rods (24) together.

6. The EVA plastic film extruder of claim 5, wherein: an air bag (26) is arranged on the push plate (25), and ammonia gas is filled in the air bag (26).

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