Composite material bridge production device

Abstract

The invention discloses a composite material bridge production device, and relates to the technical field of bridge production. The problem that a large amount of energy is wasted due to the fact that an injection molding barrel is completely heated during injection molding of an existing injection molding machine is solved. The device specifically comprises a supporting ring fixed to an injection molding machine rack, an injection molding barrel with an upward opening and of a cylindrical structure is fixed to the upper surface of the supporting ring, a top cover is detachably connected to the injection molding barrel, a raw material barrel is arranged on the portion, close to the top end, of the circumferential outer wall of the injection molding barrel, and a hexagon nut is embedded in the middle of the top cover; a propelling screw rod is screwed in the hexagonal nut, and a piston disc is arranged at the bottom end of the propelling screw rod; a pushing ring is fixed to the circumferential outer wall, close to the top end, of the pushing screw, and a rectangular hole is formed in the position, close to the edge, of the upper surface of the top cover. During injection molding, the upper portion of the piston disc can be in a power-off state all the time, namely, heating is stopped at the position, extruded by an extrusion plate, in the injection molding barrel, and then the injection molding machine is more energy-saving.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge production, and particularly to a production device for composite material bridges. Background Art

[0002] The production of composite material bridges is carried out by injection molding with an injection molding machine. Existing injection molding machines are also known as injection molding machines or injection machines. It is the main molding equipment for making various shaped plastic products from thermoplastic or thermosetting plastics using plastic molding dies. It is divided into vertical, horizontal, and all-electric types. The injection molding machine can heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity. Generally, a heating coil is provided at the barrel of the injection molding machine, so a heat insulation protection cover needs to be set to play a heat insulation role. The existing heat insulation protection cover is buckled on the barrel, which is large in volume. During the use of the injection molding machine, the safety guard needs to be removed and installed, which is time-consuming and laborious and affects the production efficiency of the injection molding machine.

[0003] After retrieval, an existing heat insulation protection cover for an injection molding machine includes a side bottom plate fixed to the injection molding machine. An upper baffle is fixed to the upper end of the side bottom plate, a right baffle is fixed to the right side of the side bottom plate, a front baffle is hinged to the front end of the upper baffle, and a left baffle is vertically fixed to one side of the front baffle. A limiting plate is fixed to the side surface of the upper baffle, and a clamping telescopic mechanism is fixedly connected to the end surface of one side of the left baffle through a connecting plate. For the heat insulation protection cover for an injection molding machine of the present invention, the assembly fixedly connecting the front baffle and the left baffle is hinged to the front end of the upper baffle. Although a heat preservation and insulation device is provided on the outer wall of the injection molding machine, it cannot fundamentally achieve environmental protection and energy conservation. When the position after the piston plate is extruded is still being continuously heated, a large amount of energy is wasted. Therefore, a new type of injection molding machine is needed that can timely stop heating the injection barrel without the plastic raw material section as the piston disk advances. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art and propose a production device for composite material bridges.

[0005] To achieve the above purpose, the following technical solutions are adopted in the present invention: A production device for composite material bridges includes a support ring fixed on the frame of an injection molding machine. The upper surface of the support ring is fixed with an injection barrel having an upward-opening cylindrical structure, and the injection barrel is detachably connected with a top cover. A raw material barrel is arranged on the circumferential outer wall of the injection barrel near the top end. A hexagonal nut is embedded in the middle of the top cover, and a propulsion screw is screwed in the hexagonal nut. The bottom end of the propulsion screw is provided with a piston disk; A push ring is fixed to the circumferential outer wall of the propulsion screw near the top end. A rectangular hole is formed in the upper surface of the top cover near the edge. A vertical insulating rod is slidably connected in the rectangular hole. A pressing rod inserted into the card slot on the circumferential outer wall of the push ring is fixed to one side of the top end of the insulating rod close to the push ring. The circumferential outer wall of the injection barrel is fixedly provided with electromagnetic heaters adjacent to each other from top to bottom. Each electromagnetic heater is provided with a touch switch mechanism, and the touch switch mechanisms are all located below the insulating rod. Thus, during injection molding, as the propulsion screw continuously descends, it drives the insulating rod made of insulating material to slowly descend. When it descends to the height of one layer of electromagnetic heaters, the touch switch mechanism of this layer will be powered off, and at this time, the electromagnetic heater of this layer stops working. Since the height of the bottom end of the insulating rod is the same as the height of the piston disc, it can be always powered off above the piston disc, that is, stop heating at the position after being extruded by the pressing plate in the injection barrel, thereby making this injection molding machine more energy-saving.

[0006] As a preferred solution in the present invention, the touch switch mechanism includes fixed abutting blocks symmetrically fixed on the outer wall of the electromagnetic heater on both sides of the insulating rod. Compression springs are fixed to the opposite sides of the two fixed abutting blocks. Metal contact blocks are fixed to the opposite ends of the two compression springs. The two metal contact blocks are connected in series in the circuit. Guide rods are fixed to the opposite sides of the two metal contact blocks. Guide holes corresponding to the guide rods are formed in the fixed abutting blocks, so that the two metal contact blocks can be closely adjacent to each other before the insulating rod is inserted downward to ensure the smoothness of the circuit, and the two metal blocks can quickly reset and still keep the circuit smooth after the insulating rod is withdrawn.

[0007] As a preferred solution in the present invention, the bottom end of the insulating rod is provided with a pointed structure, and rounded corners are formed at the edges near the top end on the opposite sides of the two metal contact blocks, which is convenient for the insulating rod to be smoothly inserted between the two metal contact blocks to separate the two metal contact blocks.

[0008] As a preferred solution in the present invention, the bottom end of the raw material barrel is provided with a funnel-shaped structure, and an inclined feeding pipe is fixed to the bottom end of the raw material barrel. An inclined through hole coaxial with the inclined feeding pipe is formed in the circumferential outer wall of the injection barrel near the top end. A dark groove is formed in the circumferential inner wall of the raw material barrel at the opening of the inclined through hole. Tension springs are fixed to the four corners of the bottom of the dark groove. The same arc-shaped cover is fixed to the ends of the four tension springs away from the bottom of the groove to block the pipe orifice of the inclined feeding pipe to prevent plastic raw material particles from falling during injection molding work. When feeding the injection barrel, only need to pull the piston disc to the topmost end, and then push open the arc-shaped cover to feed.

[0009] As a preferred solution in the present invention, a jack is formed in the bottom of the dark groove below the inclined feeding pipe, and a push rod is inserted into the jack. By pressing the push rod, the arc-shaped cover can be pushed away from the dark groove.

[0010] As a preferred solution in the present invention, a conical hole is formed in the inner wall of the bottom of the injection barrel, and an injection nozzle is fixed in the middle of the lower surface of the injection barrel. A protrusion adapted to the conical hole is reserved at the bottom of the piston disc, so as to avoid a large amount of residues accumulating at the bottom of the injection barrel at the end of injection. Such a setting allows the molten plastic at the bottom to flow away freely.

[0011] As a preferred solution in the present invention, a rotating pressure disc is fixed at the bottom end of the propulsion screw, and a limit box adapted to the outer diameter of the rotating pressure disc is fixed in the middle of the upper surface of the piston disc. A number of ball bearings are embedded near the circumferential edge of the lower surface of the rotating pressure disc, so as to ensure that the piston disc will not rotate rapidly when the propulsion screw rotates and advances, reducing the energy consumption generated by overcoming the frictional resistance.

[0012] As a preferred solution in the present invention, three to five fixing spokes are symmetrically distributed around the circumferential outer wall of the propulsion screw near the bottom end, and the same annular oil tank is fixed on the lower surface of the fixing spokes. A number of oil outlet holes are equidistantly distributed near the bottom end of the circumferential outer wall of the annular oil tank. A fuel filling pipe is arranged on the upper surface of the annular oil tank. Threads are formed on the circumferential outer wall of the top of the fuel filling pipe, and a screwing cap is screwed on the circumferential outer wall of the fuel filling pipe near the top end. Thus, when the propulsion screw screws and advances, the annular oil tank can be driven to rotate by the way. At this time, under the action of centrifugal force, the lubricating oil is thrown out from the oil outlet holes and then acts on the inner wall of the injection barrel to form lubrication.

[0013] As a preferred solution in the present invention, a conical top is arranged on the upper surface of the piston disc, so that the oil thrown out from the oil outlet holes is more likely to flow into the gap at the edge of the piston disc, achieving a lubricating effect.

[0014] As a preferred solution in the present invention, bent pipes bent downward are inserted in the oil outlet holes, and a return spring is fixed at one end of the bent pipe far away from the oil outlet hole. A sponge ball is sleeved on the outer wall of the return spring. Triangular notches that are centrosymmetric with each other are formed on the circumferential edge of the upper surface of the piston disc. The sponge ball is tightly pressed in the triangular notches. Thus, when the piston disc returns, the sponge ball is blocked by the triangular notches and deformed under pressure, and then the lubricating oil adsorbed in the sponge ball is adhered in the triangular notches and then accurately flows into the gap between the piston disc and the injection barrel.

[0015] The beneficial effects of the present invention are as follows: 1. By arranging an insulating rod that moves up and down synchronously with the propulsion screw and cooperating with a touch switch mechanism adapted to the insulating rod, it can be in a power-off state above the piston disc during injection, that is, stop heating at the position after the extrusion plate in the injection barrel extrudes, and then make the injection molding machine more energy-saving.

[0016] 2. By means of the compression spring arranged on the metal contact block, the two metal contact blocks can be made to be in close contact before the insulating rod is inserted downward, ensuring smooth circuit. And after the insulating rod is withdrawn, the two metal blocks can quickly reset and still keep the circuit smooth.

[0017] 3. By means of the annular oil tank fixed on the propulsion screw, when the propulsion screw propels spirally, it can drive the annular oil tank to rotate by the way. At this time, under the action of centrifugal force, the lubricating oil is thrown out from the oil outlet hole and then acts on the inner wall of the injection barrel to form lubrication. Brief Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of a composite material bridge production device proposed in the present invention; Figure 2 It is a schematic cross-sectional structure diagram of a composite material bridge production device proposed in the present invention; Figure 3 It is a schematic perspective cross-sectional structure diagram when feeding a composite material bridge production device proposed in the present invention; Figure 4 For the present invention Figure 3 It is a schematic enlarged structure diagram at position A of a composite material bridge production device proposed in the present invention; Figure 5 It is a schematic three-dimensional structure diagram of an oiling mechanism of a composite material bridge production device proposed in the present invention; Figure 6 It is an exploded structure diagram of an oiling mechanism of a composite material bridge production device proposed in the present invention.

[0019] In the figure: 1. Support ring; 2. Electromagnetic heater; 3. Injection barrel; 4. Hexagonal nut; 5. Raw material barrel; 6. Pushing ring; 7. Propulsion screw; 8. Pressure rod; 9. Insulating rod; 10. Top cover; 11. Fixed abutting block; 12. Compression spring; 13. Guide rod; 14. Metal contact block; 15. Rotating pressing plate; 16. Injection nozzle; 17. Piston disk; 18. Limit box; 19. Arc cover; 20. Inclined feeding pipe; 21. Jacking rod; 22. Dark groove; 23. Pulling spring; 24. Jack; 25. Annular oil tank; 26. Screwing cap; 27. Conical top; 28. Triangular notch; 29. Sponge ball; 30. Elbow pipe; 31. Fixed spoke; 32. Return spring; 33. Oil outlet hole. Detailed Embodiment

[0020] The technical solutions of this patent will be further described in detail below in combination with specific embodiments.

[0021] Embodiments of the present patent will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present patent and should not be construed as a limitation of the present patent.

[0022] This embodiment: A production device for a composite material bridge frame, as Figures 1-6 shown, includes a support ring 1 fixed on the injection molding machine frame. The upper surface of the support ring 1 is sleeved and fixed with an injection barrel 3 having an upward-opening cylindrical structure by bolts. The injection barrel 3 is fixed with a top cover 10 by bolts. A raw material barrel 5 is arranged on the circumferential outer wall of the injection barrel 3 near the top. A hexagonal nut 4 is embedded in the middle of the top cover 10. A propulsion screw 7 is screwed in the hexagonal nut 4. A piston disc 17 is arranged at the bottom end of the propulsion screw 7; A push ring 6 is fixed on the circumferential outer wall of the propulsion screw 7 near the top. A rectangular hole is opened on the upper surface of the top cover 10 near the edge. A vertical insulating rod 9 is slidably connected in the rectangular hole. A pressing rod 8 inserted into the card slot on the circumferential outer wall of the push ring 6 is fixed on one side of the top end of the insulating rod 9 near the push ring 6. The circumferential outer wall of the injection barrel 3 is fixed with electromagnetic heaters 2 adjacent to each other from top to bottom. Each electromagnetic heater 2 is provided with a touch switch mechanism, and the touch switch mechanisms are all located below the insulating rod 9. Thus, during injection molding, as the propulsion screw 7 continuously descends, the insulating rod 9 made of insulating material is also driven to slowly descend. When it descends to the height of one layer of electromagnetic heaters 2, the touch switch mechanism of this layer is powered off, and at this time, the electromagnetic heater 2 of this layer stops working. Since the height of the bottom end of the insulating rod 9 is the same as the height of the piston disc 17, it can be always powered off above the piston disc 17, that is, the position after being extruded by the pressing plate in the injection barrel 3 stops heating, thereby making the injection molding machine more energy-efficient.

[0023] In the present invention, the touch switch mechanism includes fixed abutting blocks 11 fixed on the outer wall of the electromagnetic heater 2 and symmetrically arranged on both sides of the insulating rod 9. Compression springs 12 are fixed on the opposite sides of the two fixed abutting blocks 11. Metal contact blocks 14 are fixed on the opposite ends of the two compression springs 12. The two metal contact blocks 14 are connected in series in the circuit. Guide rods 13 are fixed on the opposite sides of the two metal contact blocks 14. Guide holes corresponding to the guide rods 13 are opened on the fixed abutting blocks 11, so that the two metal contact blocks 14 can be closely adjacent to each other before the insulating rod 9 is inserted downward to ensure the smoothness of the circuit, and the two metal blocks 14 can quickly reset and still keep the circuit smooth after the insulating rod 9 is withdrawn.

[0024] Among them, the bottom end of the insulating rod 9 is provided with a pointed structure, and rounded corners are provided at the edges near the top on the opposite sides of the two metal contacts 14, facilitating the smooth insertion of the insulating rod 9 between the two metal contacts 14 to separate the two metal contacts 14.

[0025] Among them, the bottom end of the raw material barrel 5 is provided with a funnel-shaped structure, and an inclined feeding pipe 20 is fixed at the bottom end of the raw material barrel 5. An inclined through hole coaxial with the inclined feeding pipe 20 is opened near the top on the circumferential outer wall of the injection barrel 3, and a dark groove 22 is opened on the circumferential inner wall of the raw material barrel 5 at the opening of the inclined through hole. Spring pulls 23 are fixed at the four corners of the bottom of the dark groove 22. The ends of the four spring pulls 23 away from the bottom of the groove are fixed to the same arc-shaped cover 19 for blocking the pipe orifice of the inclined feeding pipe 20 to prevent plastic raw material particles from falling during the injection molding operation. When feeding the injection barrel, just pull the piston disc 17 to the topmost position and then push open the arc-shaped cover 19 to feed.

[0026] Among them, a jack 24 is opened at the bottom of the dark groove 22 below the inclined feeding pipe 20, and a push rod 21 is inserted into the jack 24. By pressing the push rod 21, the arc-shaped cover 19 can be pushed away from the dark groove 22.

[0027] Among them, a tapered hole is opened on the inner wall of the bottom of the injection barrel 3, and an injection nozzle 16 is fixed in the middle of the lower surface of the injection barrel 3. A protrusion adapted to the tapered hole is reserved at the bottom of the piston disc 17 to prevent a large amount of residues from accumulating at the bottom of the injection barrel 3 at the end of injection molding. Such a setting allows the molten plastic at the bottom to flow away freely.

[0028] Among them, a rotating pressing disc 15 is fixed at the bottom end of the propulsion screw 7, and a limit box 18 adapted to the outer diameter of the rotating pressing disc 15 is fixed in the middle of the upper surface of the piston disc 17. A number of balls are embedded near the circumferential edge of the lower surface of the rotating pressing disc 15, ensuring that the piston disc 17 does not rotate rapidly when the propulsion screw 7 rotates and advances, reducing the energy consumption caused by overcoming the frictional resistance.

[0029] Among them, three fixing spokes 31 are symmetrically distributed around the center near the bottom end of the circumferential outer wall of the propulsion screw 7, and the same annular oil tank 25 is fixed on the lower surface of the fixing spokes 31. A number of equally spaced oil outlet holes 33 are opened on the circumferential outer wall of the annular oil tank 25 near the bottom end. A fuel filling pipe is arranged on the upper surface of the annular oil tank 25. Threads are opened on the circumferential outer wall of the top of the fuel filling pipe, and a screwing cap 26 is screwed on the circumferential outer wall of the fuel filling pipe near the top end. Thus, when the propulsion screw 7 screws and advances, it can drive the annular oil tank 25 to rotate by the way. At this time, under the action of centrifugal force, the lubricating oil is thrown out from the oil outlet holes 33 and then acts on the inner wall of the injection barrel 3 to form lubrication.

[0030] Among them, a conical top 27 is provided on the upper surface of the piston disc 17, so that the oil ejected from the oil outlet hole 33 is more likely to flow into the gap at the edge of the piston disc 17, achieving a lubricating effect.

[0031] Among them, bent pipes 30 bent downward are inserted into the oil outlet holes 33, and a return spring 32 is fixed at one end of the bent pipe 30 away from the oil outlet hole 33. A sponge ball 29 is sleeved on the outer wall of the return spring 32. Triangular notches 28 that are centrosymmetric with each other are formed at the circular peripheral edge of the upper surface of the piston disc 17. The sponge ball 29 is tightly pressed in the triangular notches 28. Thus, when the piston disc 17 returns, the sponge ball 29 is blocked by the triangular notches 28 and is compressed and deformed, and then the lubricating oil adsorbed in the sponge ball 29 is adhered in the triangular notches 28, and then accurately flows into the gap between the piston disc 17 and the injection barrel 3.

[0032] Working principle: When this embodiment is in use, as the propelling screw 7 spirally descends, since the groove in the middle of the pressing ring 6 forms a sliding connection with the pressure rod 8, at this time, the insulating rod 9 made of insulating material will also slowly descend. Every time the insulating rod 9 descends to the height of one layer of the electromagnetic heater 2, it will cut off the power supply of the touch switch mechanism of this layer, that is, insert between the two metal contact blocks 14; at this time, the electromagnetic heater 2 of this layer stops working. Since the height of the bottom end of the insulating rod 9 is the same as the height of the piston disc 17, it will be in a power-off state above the piston disc 17 all the time, that is, stop heating at the position after the extrusion plate in the injection barrel 3 has extruded, and then make this injection molding machine more energy-saving; When the propelling screw 7 spirally advances, it drives the annular oil tank 25 to rotate by the way. At this time, under the action of centrifugal force, the lubricating oil is ejected from the oil outlet hole 33, and then acts on the inner wall of the injection barrel 3 to form lubrication.

[0033] The above is only the preferred specific implementation manner in the present invention, but the protection scope in the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention, according to the technical solution in the present invention and the concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A composite material bridge production device, comprising a support ring (1) fixed on an injection molding machine frame, an injection molding barrel (3) with an opening upwardly and a cylindrical structure fixed on the upper surface of the support ring (1), and a top cover (10) detachably connected to the injection molding barrel (3), a raw material barrel (5) is arranged near the top of the circumferential outer wall of the injection molding barrel (3), and a hexagonal nut (4) is embedded in the middle of the top cover (10), characterized in that: The hexagonal nut (4) is threaded with a propulsion screw (7), and a piston disc (17) is provided at the bottom end of the propulsion screw (7); A push ring (6) is fixed to the circumferential outer wall of the advancing screw (7) near the top end, and a rectangular hole is opened on the upper surface of the top cover (10) near the edge, a vertical insulating rod (9) is slidably connected in the rectangular hole, and a pressure rod (8) inserted into the groove of the circumferential outer wall of the pushing ring (6) is fixed to the top of the insulating rod (9) near the side of the pushing ring (6), and the electromagnetic heater (2) is fixed to the circumferential outer wall of the injection barrel (3) from top to bottom, and each electromagnetic heater (2) is provided with a touch switch mechanism, and the touch switch mechanism is located below the insulating rod (9).

2. A composite material bridge production device according to claim 1, characterized in that: The touch switch mechanism comprises fixed blocks (11) fixed to the outer wall of the electromagnetic heater (2) and located symmetrically on both sides of the insulating rod (9), and compression springs (12) are fixed on opposite sides of the two fixed blocks (11), and metal contacts (14) are fixed on opposite sections of the two compression springs (12), the two metal contacts (14) are connected in series in the circuit, guide rods (13) are fixed on opposite sides of the two metal contacts (14), and guide holes corresponding to the guide rods (13) are opened on the fixed blocks (11).

3. A composite material bridge production device according to claim 2, characterized in that: The bottom end of the insulating rod (9) is configured as a pointed structure, and the opposite sides of the two metal contacts (14) are provided with rounded corners near the top edge.

4. A composite material bridge production device according to claim 1, characterized in that: The bottom end of the raw material barrel (5) is configured to be a funnel-shaped structure, and an oblique feed pipe (20) is fixed to the bottom end of the raw material barrel (5); an oblique through hole coaxial with the oblique feed pipe (20) is formed on the circumferential outer wall of the injection molding barrel (3) near the top, and a dark groove (22) is formed on the circumferential inner wall of the raw material barrel (5) at the opening of the oblique through hole; tension springs (23) are fixed at the four corners of the bottom of the dark groove (22); and the same arc-shaped cover (19) is fixed to the ends of the four tension springs (23) away from the bottom of the groove.

5. A composite material bridge production device according to claim 4, characterized in that: The bottom of the dark groove (22) is located below the inclined material conveying pipe (20) and is provided with an insertion hole (24), and a push rod (21) is inserted into the insertion hole (24).

6. The composite bridge production device according to claim 1, characterized in that: The bottom inner wall of the injection barrel (3) is provided with a tapered hole, and an injection nozzle (16) is fixed in the middle of the lower surface of the injection barrel (3), and a protrusion matching the tapered hole is reserved at the bottom of the piston disc (17).

7. The composite bridge production device according to claim 1, characterized in that: A rotating pressure plate (15) is fixed to the bottom end of the advancing screw (7), and a limit box (18) matching the outer diameter of the rotating pressure plate (15) is fixed to the middle of the upper surface of the piston plate (17), and a plurality of balls are embedded near the circumferential edge of the lower surface of the rotating pressure plate (15).

8. The composite bridge production device according to claim 1, characterized in that: The circumferential outer wall of the propulsion screw (7) is fixed with three to five fixed spokes (31) distributed symmetrically in the center near the bottom end, and the same annular oil tank (25) is fixed to the lower surface of the fixed spokes (31), and the circumferential outer wall of the annular oil tank (25) is opened near the bottom end with a plurality of oil outlet holes (33) distributed at equal distances, and the upper surface of the annular oil tank (25) is provided with a refueling pipe, the top circumferential outer wall of the refueling pipe is threaded, and the circumferential outer wall of the refueling pipe is screwed with a screw cap (26) near the top end.

9. A composite material bridge production device according to claim 8, characterized in that: The upper surface of the piston disc (17) is provided with a conical top (27).

10. A composite material bridge production device according to any one of claims 8-9, characterized in that: The oil outlet holes (33) are all plugged with bent pipes (30) bent downward, and a return spring (32) is fixed to one end of the bent pipe (30) away from the oil outlet hole (33), a sponge ball (29) is sleeved on the outer wall of the return spring (32), and triangular notches (28) symmetrical to each other are formed at the circumferential edge of the upper surface of the piston disk (17), and the sponge ball (29) is tightly pressed in the triangular notch (28).

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