Mouth mold device capable of increasing material pressure uniformity

Abstract

The utility model discloses a mouth mold device capable of increasing material pressure uniformity, which comprises a mouth mold body, and a feeding mechanism is arranged in the mouth mold body and on the top side of the mouth mold body. When the improved mouth mold device is used, the feeding mechanism continuously pours outside molten raw materials into the mouth mold body, so that a specific amount of raw materials are stored at the bottom in the mouth mold body all the time, and the gas injection mechanism slowly and continuously injects gas into the mouth mold body from the gas inlet connector at a constant speed; redundant gas in the mouth mold body is discharged from the pressure limiting valve, and is matched with the raw materials to block the discharge port of the mouth mold body, so that a high-pressure cavity with specific strength is continuously formed in the top in the mouth mold body, and the raw materials are pushed downwards by specific thrust from all positions of the top of the raw materials through the gas; therefore, the raw materials are uniformly discharged from the plurality of discharge ports of the mouth mold body at a constant speed, and the use of the device is not influenced due to different pushing forces applied to the raw materials at different discharge ports.

Description

Technical Field

[0001] The utility model relates to the technical field of die devices, in particular to a die device capable of increasing the uniformity of material pressure. Background Art

[0002] A polymer extruder is generally composed of an extruder main unit, a die, and other parts. The polymer material becomes a molten polymer melt after being conveyed, heated, and mixed in the extruder main unit. The molten polymer melt is gradually pushed toward the die under the rotation of the screw in the extruder main unit, and is extruded from the extrusion hole on the extruder die under the action of pressure. The extruded material strips are cooled and pelletized to become the finished pellets required for production.

[0003] The existing die device generally directly injects the material into the die device, and then directly discharges it from several discharge ports of the die device. However, due to the influx of material at the feed port of the die device, the material at some discharge ports is subjected to greater pressure, resulting in uneven discharge of material at several discharge ports, affecting the use of the device. Utility Model Content

[0004] The purpose of the utility model is to provide a die device that increases the uniformity of material pressure, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a die device for increasing the uniformity of material pressure, comprising a die body, a feeding mechanism being provided inside the die body and on the top side of the die body, a pushing assembly being provided on the die body, the pushing assembly comprising a pressure limiting valve and an air inlet interface, the pressure limiting valve and the air inlet interface being relatively arranged on the left and right sides of the top of the die body, and the pressure limiting valve and the air inlet mechanism being respectively fixed through the shell walls on the left and right sides of the die body, and an air injection mechanism being provided on the top side of the die body.

[0006] Preferably, the die body is divided into two parts, a material guide trough and a cover, and the cover is fixedly installed in the top opening of the material guide trough by bolts, and two heating plates are relatively fixedly installed in the shell wall at the bottom of the material guide trough. The front view shape of the bottom of the material guide trough is an isosceles trapezoidal shape, and the discharge hole of the material guide trough is an expanded shape.

[0007] Preferably, the feeding mechanism includes a plurality of feeding interfaces, which are fixedly installed through the top side of the cover, and the spacing between two adjacent feeding interfaces is equal, and the top end of the feeding interface is connected to and installed with a feeding pipe.

[0008] Preferably, a mesh plate in the shape of an arc plate is provided in the material guiding trough, and the outer peripheral wall of the mesh plate is in contact with the inner wall of the material guiding trough.

[0009] Preferably, a plurality of limiting blocks are provided on the bottom side of the mesh plate, and the intervals between two adjacent limiting blocks are equal, and the limiting blocks are fixedly connected to the inner wall of the material guide trough.

[0010] Preferably, the gas injection mechanism includes an air pump, which is fixedly mounted on the top side of the cover, and the exhaust end of the air pump is connected to the intake end of the air intake interface through a connecting pipe.

[0011] Preferably, an air storage box is fixedly installed on the top side of the cover, and the air storage box and the air pump are relatively arranged on the left and right sides of a plurality of feed interfaces, the exhaust end of the air storage box is connected with the air inlet end of the air pump through a conduit, and the air inlet end of the air storage box is connected with the exhaust end of the pressure limiting valve through an air inlet pipe, and a piston plate in the shape of a rectangular plate is slidably installed in the air storage box.

[0012] The utility model has at least the following beneficial effects:

[0013] 1. When the improved die device is in use, the feeding mechanism continuously pours external molten raw materials into the die body, so that a specific amount of raw materials is always stored at the bottom of the die body, and the gas injection mechanism slowly and uniformly injects gas into the die body from the gas inlet interface, and the excess gas in the die body is discharged from the pressure limiting valve. In conjunction with the blocking of the discharge port of the die body by the raw materials, a high-pressure chamber of a specific strength is continuously formed at the top of the die body, and then the gas pushes the raw materials downward with a specific thrust from various positions on the top of the raw materials, so that the raw materials are uniformly and evenly discharged from the multiple discharge ports of the die body, and the use of the device is not affected by the different thrusts on the raw materials at different discharge ports;

[0014] 2. The raw materials injected into the die body by the feeding mechanism are diverted by a number of feeding interfaces and screen plates, so that the raw materials drip onto the raw materials in the die body from many positions above the raw materials at the bottom of the die body, thereby making it almost impossible for height differences to affect the discharge of the raw materials at some positions in the die body;

[0015] 3. The trapezoidal setting at the bottom of the guide trough makes the amount of raw materials passing through the bottom of the guide trough gradually decrease when the above-mentioned gas pushes the material. At the same time, the expansion-shaped setting of the discharge hole of the guide trough makes the amount of raw materials passing through the discharge hole gradually decrease synchronously. In this process, the fluidity and deformation ability of the raw materials are effectively controlled and adjusted, so that the raw materials can be evenly distributed and flowed during the expansion process, thereby achieving the effect of uniform discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is an overall schematic diagram of the utility model;

[0018] Figure 2 This is a bottom view of the internal structure of the guide chute of the utility model;

[0019] Figure 3 For this utility model Figure 2 A magnified view of the structure at center A;

[0020] Figure 4 This is a front view of the internal structure of the guide chute of the utility model;

[0021] Figure 5 This is a schematic diagram of the internal structure of the gas storage box of the utility model.

[0022] In the figure: 1. Die body; 11. Material guide trough; 12. Sealing cover; 2. Feeding mechanism; 21. Feeding interface; 22. Feeding pipe; 23. Screen plate; 24. Limiting block; 3. Pushing assembly; 31. Pressure limiting valve; 32. Air inlet interface; 33. Air injection mechanism; 331. Air pump; 332. Connecting pipe; 333. Air storage box; 334. Conduit; 335. Air inlet pipe; 336. Piston plate; 4. Heating plate. DETAILED DESCRIPTION

[0023] In order to make the technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] The utility model provides a technical solution: Figure 1 - Figure 5 The utility model discloses a die device for increasing the uniform pressure of materials, including a die body 1, a feeding mechanism 2 is provided inside the die body 1 and on the top side of the die body 1, a pushing assembly 3 is provided on the die body 1, and the pushing assembly 3 includes a pressure limiting valve 31 and an air inlet interface 32, the pressure limiting valve 31 and the air inlet interface 32 are relatively arranged on the left and right sides of the top of the die body 1, and the pressure limiting valve 31 and the air inlet mechanism are respectively fixed through the shell walls on the left and right sides of the die body 1, and an air injection mechanism 33 is provided on the top side of the die body 1.

[0025] In this embodiment, when the improved die device is in use, the feeding mechanism 2 continuously pours external molten raw materials into the die body 1, and while replenishing the raw materials lost in the die body 1, a specific amount of raw materials is always stored at the bottom of the die body 1. At the same time, the gas injection mechanism 33 slowly and uniformly injects gas into the die body 1 from the air inlet interface 32, and the excess gas in the die body 1 is discharged from the pressure limiting valve 31. In conjunction with the blocking of the discharge port of the die body 1 by the raw material, a high-pressure cavity of a specific strength is continuously formed at the top of the die body 1, and then the raw material is pushed downward with a specific thrust from various positions on the top of the raw material through the gas, so that the raw material is discharged uniformly and evenly from several discharge ports of the die body 1.

[0026] In a further preferred embodiment of the present invention, Figure 1 and Figure 4 As shown, the die body 1 is divided into two parts: a guide trough 11 and a cover 12. The cover 12 is fixedly installed in the top opening of the guide trough 11 by bolts. Two heating plates 4 are relatively fixedly installed in the shell wall at the bottom of the guide trough 11. The front view shape of the bottom of the guide trough 11 is an isosceles trapezoidal shape, and the discharge hole of the guide trough 11 is an expanded shape.

[0027] In this embodiment, when cleaning the die body 1, the operator unscrews the bolts from the cover 12, and then the operator can directly remove the cover 12 from the guide chute 11. The operator can insert the cleaning device and the hand into the guide chute 11 through the larger opening at the top of the guide chute 11 to clean the die body 1;

[0028] The trapezoidal design of the bottom of the guide trough 11 allows the gas to push the material, and the amount of material passing through the bottom of the guide trough 11 gradually decreases. At the same time, the flared shape of the discharge hole of the guide trough 11 also causes the amount of material passing through the discharge hole to gradually decrease. In this process, the fluidity and deformation ability of the material are effectively controlled and adjusted, so that the material can be evenly distributed and flowed during the flaring process, thereby achieving a uniform discharge effect.

[0029] When the guide trough 11 stores raw materials, the heating plate 4 heats the guide trough 11 simultaneously, so that the guide trough 11 is always maintained within a specific range, and the raw materials in the guide trough 11 are always maintained in a molten state through heat exchange between the raw materials and the heat conducting plate.

[0030] In a further preferred embodiment of the present invention, Figure 1 and Figure 4 As shown, the feeding mechanism 2 includes a plurality of feeding interfaces 21, which are fixedly installed on the top side of the cover 12, and the distance between two adjacent feeding interfaces 21 is equal. The top end of the feeding interface 21 is connected to the feeding pipe 22.

[0031] In this embodiment, when the raw materials are injected into the die body 1, the external raw materials are guided to the feed interface 21 by the feed pipe 22, and then the raw materials fall into the guide trough 11 from the plurality of feed interfaces 21, and the raw materials are further injected and initially diverted to prevent large clumps of raw materials from falling into the raw materials at the bottom of the guide trough 11, resulting in a large height difference between the positions of the raw materials in the guide trough 11.

[0032] It should be noted that the feed end of the feed end is connected to the discharge end of the external injection device.

[0033] In a further preferred embodiment of the present invention, Figure 2 and Figure 4 As shown, a mesh plate 23 in the shape of an arc plate is provided in the guide trough 11, and the outer peripheral wall of the mesh plate 23 contacts the inner wall of the guide trough 11;

[0034] In this embodiment, the raw materials dropped from the feed interface 21 will directly fall onto the mesh plate 23, and since the flow of raw materials in the holes of the mesh plate 23 is limited, the raw materials slide along the arc surface of the mesh plate 23 to distribute the raw materials, so that the raw materials are further diverted through the numerous holes of the mesh plate 23 and drip from multiple positions onto the raw materials at the bottom of the guide trough 11, preventing large clumps of raw materials from falling into the raw materials at the bottom of the guide trough 11, resulting in a large height difference between the positions of various parts of the raw materials in the guide trough 11.

[0035] In a further preferred embodiment of the present invention, Figure 2 - Figure 4 As shown, a plurality of limit blocks 24 are provided on the bottom side of the mesh plate 23, and the spacing between two adjacent limit blocks 24 is equal. The limit blocks 24 are fixedly connected to the inner wall of the guide trough 11;

[0036] In this embodiment, after the cover 12 is disassembled, the operator can directly take out the mesh plate 23 from the guide chute 11 to clean the mesh plate 23, which facilitates the cleaning operation of the mesh plate 23.

[0037] After the die body 1 is cleaned, the operator reinserts the screen plate 23 into the guide trough 11. Due to the support and limitation of the screen plate 23 by the limit block 24 and the friction between the screen plate 23 and the inner wall of the guide trough 11, the screen plate 23 is placed more stably at the top of the guide trough 11. Finally, the cover 12 is fixed to the top opening of the guide trough 11 by bolts, and the cleaning of the die body 1 is completed.

[0038] In a further preferred embodiment of the present invention, Figure 1 As shown, the gas injection mechanism 33 includes an air pump 331, which is fixedly mounted on the top side of the cover 12, and the exhaust end of the air pump 331 is connected to the air inlet end of the air inlet interface 32 through a connecting pipe 332;

[0039] In this embodiment, after the amount of raw materials at the bottom of the above-mentioned material guide trough 11 reaches a specific amount, the air pump 331 is started to continuously and slowly extract the gas in the gas storage box 333 through the conduit 334, and continuously inject it into the material guide trough 11 through the connecting pipe 332 and the air inlet interface 32, so that a high-pressure cavity is continuously formed at the top of the material guide trough 11, thereby the raw materials are synchronously pushed downward from various positions on the top of the material guide trough 11 by the gas, so that the raw materials are evenly discharged at a uniform speed from the discharge port of the material guide trough 11.

[0040] In a further preferred embodiment of the present invention, Figure 1 、 Figure 4 and Figure 5 As shown, an air storage box 333 is fixedly mounted on the top side of the cover 12, and the air storage box 333 and the air pump 331 are arranged on the left and right sides of the plurality of feed interfaces 21. The exhaust end of the air storage box 333 is connected to the air inlet end of the air pump 331 via a conduit 334, and the air inlet end of the air storage box 333 is connected to the exhaust end of the pressure limiting valve 31 via an air inlet pipe 335. A piston plate 336 in the shape of a rectangular plate is slidably mounted in the air storage box 333.

[0041] In this embodiment, after the excess gas in the die body 1 is discharged from the pressure limiting valve 31, the gas flows back into the die body 1 through the air inlet pipe 335 to be sucked by the air pump 331, thereby forming an internal circulation of gas in the device, thereby preventing the air pump 331 from sucking in external air and injecting external dust into the die body 1, which would affect the use of the device.

[0042] As the gas in the above-mentioned gas storage box 333 increases or decreases, due to the push of the gas on the piston plate 336 and the effect of the piston plate 336's own gravity, the piston plate 336 moves up or down synchronously in the gas storage box 333, and automatically adjusts the space between the bottom side of the piston plate 336 and the inner wall of the gas storage box 333, so that the air pressure in the gas storage box 333 is maintained within a specific range, avoiding the formation of a high-pressure cavity or a negative-pressure cavity in the gas storage box 333, which affects the discharge of excess gas in the guide groove 11 at the pressure limiting valve 31.

[0043] Working principle: When the improved die device is in use, the heating plate 4 first heats the guide trough 11 so that the guide trough 11 is always maintained within a specific temperature range. Then, the external raw materials are uniformly injected into the die body 1 through the feed pipe 22 from the feed interface 21. The raw materials discharged from the feed interface 21 drip onto the mesh plate 23 through multiple feed interfaces 21. Since the flow of raw materials in the holes of the mesh plate 23 is limited, the raw materials slide along the curved surface of the mesh plate 23 to distribute the raw materials. The raw materials pass through the numerous holes of the mesh plate 23 and drip from multiple positions to the bottom of the guide trough 11 for storage.

[0044] It should be noted that due to the heat exchange between the guide trough 11 and the raw materials in the guide trough 11, the temperature of the raw materials in the guide trough 11 is continuously maintained within a specific temperature range, so that the raw materials are always kept in a molten state;

[0045] After the stock of raw materials at the bottom of the storage barrel is filled, the air pump 331 starts to continuously and slowly extract the gas in the gas storage box 333 through the conduit 334, and continuously injects the gas into the guide trough 11 through the connecting pipe 332 and the air inlet interface 32, so that a high-pressure chamber is continuously formed at the top of the guide trough 11, so that the gas pushes the raw materials downward synchronously from various positions on the top of the guide trough 11, so that the raw materials are evenly discharged from the discharge port of the guide trough 11 at a uniform speed;

[0046] It should be noted that after the raw materials are discharged from the discharge port of the guide trough 11, the external raw materials flow into the die body 1 simultaneously to replenish the raw materials lost in the die body 1;

[0047] When the high pressure intensity at the top of the die body 1 exceeds a threshold, the pressure difference across the pressure limiting valve 31 also exceeds the threshold, and the excess gas in the die body 1 quickly passes through the pressure limiting valve 31 and flows back into the gas storage box 333 through the air inlet pipe 335.

[0048] It should be noted that as the gas in the gas storage box 333 increases or decreases, due to the push of the gas on the piston plate 336 and the effect of the weight of the piston plate 336 itself, the piston plate 336 moves up or down in the gas storage box 333, and the space between the bottom side of the piston plate 336 and the inner wall of the gas storage box 333 is automatically adjusted, so that the gas pressure in the gas storage box 333 is maintained within a specific range.

[0049] When cleaning the die body 1, the operator unscrews the bolts on the cover 12. At this time, the operator can directly take out the cover 12 and the screen plate 23 from the guide trough 11. After the cleaning of the screen plate 23 and the guide trough 11 is completed, the operator reinserts the screen plate 23 into the guide trough 11. Due to the support and positioning of the screen plate 23 by the limit block 24 and the friction between the screen plate 23 and the inner wall of the guide trough 11, the screen plate 23 is placed more stably at the top of the guide trough 11. Finally, the cover 12 is fixed to the top opening of the guide trough 11 by bolts, and the cleaning of the die body 1 is completed.

[0050] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. A die device for increasing uniform material pressure, comprising a die body (1), characterized in that: A feeding mechanism (2) is provided inside the die body (1) and on the top side of the die body (1); a pushing assembly (3) is provided on the die body (1); the pushing assembly (3) comprises a pressure-limiting valve (31) and an air inlet interface (32); the pressure-limiting valve (31) and the air inlet interface (32) are relatively arranged on the left and right sides of the top of the die body (1); and the pressure-limiting valve (31) and the air inlet mechanism are respectively fixed through the shell walls on the left and right sides of the die body (1); and an air injection mechanism (33) is provided on the top side of the die body (1).

2. A die device for increasing uniform material pressure according to claim 1, characterized in that: The die body (1) is divided into two parts, a material guide trough (11) and a cover (12), and the cover (12) is fixedly installed in the top opening of the material guide trough (11) by bolts. Two heating plates (4) are relatively fixedly installed in the shell wall at the bottom of the material guide trough (11). The front view shape of the bottom of the material guide trough (11) is an isosceles trapezoidal shape, and the discharge hole of the material guide trough (11) is an expanded shape.

3. A die device for increasing uniform material pressure according to claim 2, characterized in that: The feeding mechanism (2) comprises a plurality of feeding interfaces (21), wherein the plurality of feeding interfaces (21) are fixedly connected through the top side of the cover (12), and the spacing between two adjacent feeding interfaces (21) is equal. The top end of the feeding interface (21) is connected to a feeding pipe (22).

4. A die device for increasing uniform material pressure according to claim 3, characterized in that: A mesh plate (23) in the shape of an arc plate is provided in the material guide trough (11), and the outer peripheral wall of the mesh plate (23) is in contact with the inner wall of the material guide trough (11).

5. A die device for increasing uniform material pressure according to claim 4, characterized in that: A plurality of limiting blocks (24) are relatively provided on the bottom side of the mesh plate (23), and the spacing between two adjacent limiting blocks (24) is equal. The limiting blocks (24) are fixedly connected to the inner wall of the material guide trough (11).

6. A die device for increasing uniform material pressure according to claim 5, characterized in that: The gas injection mechanism (33) comprises an air pump (331), the air pump (331) is fixedly mounted on the top side of the cover (12), and the exhaust end of the air pump (331) is connected to the intake end of the intake interface (32) via a connecting pipe (332).

7. A die device for increasing uniform material pressure according to claim 6, characterized in that: An air storage box (333) is fixedly mounted on the top side of the sealing cover (12), and the air storage box (333) and the air pump (331) are relatively arranged on the left and right sides of the plurality of feed interfaces (21). The exhaust end of the air storage box (333) is connected to the intake end of the air pump (331) via a conduit (334), and the intake end of the air storage box (333) is connected to the exhaust end of the pressure limiting valve (31) via an intake pipe (335). A piston plate (336) in the shape of a rectangular plate is slidably mounted in the air storage box (333).

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