Injection molding device and injection molding preparation method of industrial plastic product

Abstract

The invention relates to the technical field of plastic processing, and provides an injection molding device for industrial plastic products and an injection molding preparation method thereof.The injection molding device comprises a workbench and a material pipe, a shell is fixedly installed on one side of the top end of the workbench, an injection molding mechanism is arranged in the shell, and a cutting mechanism is movably installed at the top end of the injection molding mechanism; a material pipe is fixedly installed on the other side of the top end of the workbench, and the top of the material pipe is connected with a material drying barrel. By arranging the material cutting mechanism, when the lower mold moves towards one side, a gear makes contact with a rack to rotate anticlockwise, a clamping block is clamped with a ratchet, a connecting shaft and a turbine are driven to rotate, a worm at the bottom of the turbine rotates, a blade is driven to rotate, and a sprue of a plastic product is cut off; therefore, the function of automatically cutting off the pouring gate in the injection molding process of the industrial plastic product is realized, the labor cost and the working intensity are reduced, the production period is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic processing, and in particular to an injection molding device for industrial plastic products and an injection molding preparation method thereof. Background Art

[0002] Injection molding is a plastic manufacturing process that injects molten plastic material into a mold and then cools and solidifies it. The basic principle is to add granular or powdered plastic raw materials into the hopper of the injection machine. The raw materials are heated and melted into a flowing state. Under the push of the screw or piston of the injection machine, the raw materials enter the mold cavity through the nozzle and the mold pouring system, and harden and shape in the mold cavity. The injection molding process is widely used in the field of industrial plastic products, such as electronic product housings, automotive parts, medical device parts, etc.

[0003] The above-mentioned prior art solutions have the following defects: the gate, as part of the pouring system, is the last place that the plastic flows through before flowing into the cavity. The gate will be carried when the plastic product is molded, and the gate needs to be cut or torn off to obtain a complete product. The injection molding equipment cannot automatically cut off the gate, and the workers on the production line need to perform this step manually, which increases labor costs and work intensity, and extends the production cycle of each product, because the workers need to wait for the product to cool to the appropriate temperature before they can operate, which will affect the overall production efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide an injection molding device for industrial plastic products and an injection molding preparation method thereof, so as to solve the defect that the existing injection molding process for industrial plastic products cannot automatically cut off the gate.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an injection molding device for industrial plastic products, comprising a workbench and a material pipe, a shell is fixedly installed on one side of the top of the workbench, and an injection molding mechanism is arranged inside the shell, a cutting mechanism is movably installed on the top of the injection molding mechanism, a material pipe is fixedly installed on the other side of the top of the workbench, and a drying barrel is connected to the top of the material pipe; the cutting mechanism comprises a blade, a rack, a worm, a turbine, a connecting shaft, a gear and a cross plate; the cross plate bolts are installed on the top of the injection molding mechanism, a blade is installed on the rotating shaft on one side of the cross plate, and a worm is fixedly installed on the rotating shaft on one side of the blade, a turbine is arranged on the top of the worm, and one end of the turbine is connected to the connecting shaft, a gear is movably installed on the end of the connecting shaft away from the turbine, and a rack is fixedly installed inside the shell at the bottom of the gear.

[0006] Preferably, the material tube comprises a servo motor, a heating block and a screw, wherein the heating block is wrapped around the surface of the material tube, the screw is laterally movably installed inside the material tube, and a servo motor is installed on one side of the screw.

[0007] Preferably, the injection molding mechanism comprises a lower mold, a top plate, an upper mold and a push plate, wherein the lower mold is fixedly mounted on one side of the shell, and an upper mold is movably disposed on one side of the lower mold.

[0008] Preferably, a push plate is fixedly installed on a side of the upper mold away from the lower mold, and a top plate is movably arranged between the push plate and the upper mold, and cooling channels are arranged inside the lower mold and the upper mold.

[0009] Preferably, the top plate comprises a protrusion, a top column, a compression spring and a top pin, the top column is fixedly installed on one side of the top plate, and the side wall of the shell on one side of the top column is fixedly provided with a protrusion.

[0010] Preferably, ejector pins are fixedly installed at the corners of one side of the ejector plate opposite to the ejector column, and the ejector pins penetrate the upper mold, and compression springs are wound around the outsides of the ejector pins.

[0011] Preferably, the rack and the gear have the same number of teeth, and the worm and the turbine are meshingly connected.

[0012] Preferably, the gear comprises a tension spring, a block and a ratchet, and the ratchet is fixedly mounted on one end of the connecting shaft.

[0013] Preferably, one end of the gears on both sides of the ratchet is hinged with a clamping block, and one side of the clamping block is provided with a tension spring, and the clamping block is engaged with the ratchet when the gear rotates counterclockwise.

[0014] A method for preparing an industrial plastic product by injection molding comprises the following steps:

[0015] S1. Add plastic particles from the drying barrel and drop them into the inside of the material tube. Start the heating block to heat and melt them. At the same time, start the servo motor to drive the screw to rotate, push the melted plastic raw materials forward, and take them into the lower mold from the nozzle of the material tube;

[0016] S2. After the mold cavity between the lower mold and the upper mold is filled with plastic raw materials, the cooling channels in the lower mold and the upper mold are connected to cool the plastic raw materials into solids. After the temperature drops to a suitable temperature, the air pump on one side of the push plate is started to pull the upper mold away from the lower mold to open the mold;

[0017] S3. When the lower mold moves to one side, the gear on its top contacts the rack. Because they mesh with each other, the gear rotates counterclockwise. When rotating counterclockwise, the block engages with the ratchet, driving the connecting shaft and the turbine to rotate, causing the worm at the bottom of the turbine to rotate, driving the blade connected to the turbine to rotate, and cutting off the gate carried by the plastic product outside the upper mold. The number of teeth on the rack and the gear is the same, which just allows the gear and the blade to rotate one circle and reset;

[0018] S4. When the blade rotates and resets, the push plate continuously moves so that the ejector column and the protrusion are pressed against each other, pushing the ejector plate fixed thereto to move in the opposite direction, driving the ejector pin to penetrate the edge of the upper mold and push the plastic product outside it to be demolded.

[0019] The invention provides an injection molding device for industrial plastic products and an injection molding preparation method thereof, which have the advantages that:

[0020] By providing a cutting mechanism, when the lower mold moves to one side, the gear on its top contacts the rack, and because they mesh with each other, the gear rotates counterclockwise. When rotating counterclockwise, the clamping block engages with the ratchet, driving the connecting shaft and the turbine to rotate, so that the worm at the bottom of the turbine rotates, driving the blade connected to the turbine to rotate, and cutting off the gate carried on the plastic product outside the upper mold. The rack and the gear have the same number of teeth, which just makes the gear and the blade rotate one circle to reset. When the lower mold resets and moves, the gear contacts the rack and rotates clockwise, the clamping block disengages and slides with the ratchet, the gear idles, and the blade does not work, thereby realizing the function of automatically cutting off the gate in the injection molding process of industrial plastic products, reducing labor costs and work intensity, shortening the production cycle, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of a three-dimensional structure of a shell in a half-section state viewed from the right side of the present invention;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the shell of the present invention in a half-section state viewed from the left;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the upper mold of the present invention;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the upper mold of the present invention in a half-section state viewed from the right;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the upper mold of the present invention in a half-section state viewed from the left;

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the material tube in a half-section state of the present invention;

[0028] Figure 8 For the present invention Figure 4 A partial enlarged schematic diagram of the three-dimensional structure.

[0029] Explanation of the reference numerals in the figure: 1. workbench; 2. material pipe; 21. servo motor; 22. heating block; 23. screw; 3. drying barrel; 4. shell; 5. injection molding mechanism; 51. lower mold; 52. top plate; 521. bump; 522. ejector column; 523. compression spring; 524. ejector pin; 53. upper mold; 54. push plate; 6. cutting mechanism; 61. blade; 62. rack; 63. worm; 64. turbine; 65. connecting shaft; 66. gear; 661. tension spring; 662. block; 663. ratchet; 67. cross plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 8The present invention provides an injection molding device for industrial plastic products, comprising a workbench 1 and a material pipe 2, a shell 4 is fixedly installed on one side of the top of the workbench 1, and an injection molding mechanism 5 is arranged inside the shell 4, a cutting mechanism 6 is movably installed on the top of the injection molding mechanism 5, a material pipe 2 is fixedly installed on the other side of the top of the workbench 1, and a drying barrel 3 is connected to the top of the material pipe 2; the material pipe 2 comprises a servo motor 21, a heating block 22 and a screw 23, the heating block 22 is wrapped around the surface of the material pipe 2, the screw 23 is movably installed in the interior of the material pipe 2 laterally, and a servo motor 21 is installed on one side of the screw 23; the injection molding mechanism 5 comprises The lower mold 51, the top plate 52, the upper mold 53 and the push plate 54, the lower mold 51 is fixedly installed on one side of the shell 4, the upper mold 53 is movably arranged on one side of the lower mold 51, the push plate 54 is fixedly installed on the side of the upper mold 53 away from the lower mold 51, and the top plate 52 is movably arranged between the push plate 54 and the upper mold 53, the lower mold 51 and the upper mold 53 are both provided with cooling channels, the top plate 52 includes a protrusion 521, a top column 522, a compression spring 523 and an ejector pin 524, the ejector column 522 is fixedly installed on one side of the top plate 52, and the side wall of the shell 4 on one side of the ejector column 522 is fixedly arranged There is a protrusion 521, and an ejector pin 524 is fixedly installed at the corner of one side of the top plate 52 opposite to the ejector column 522, and the ejector pin 524 penetrates the upper mold 53, and the outside of the ejector pin 524 is wound with a compression spring 523; the cutting mechanism 6 includes a blade 61, a rack 62, a worm 63, a turbine 64, a connecting shaft 65, a gear 66 and a cross plate 67; the cross plate 67 is bolted to the top of the injection molding mechanism 5, a blade 61 is installed on the rotating shaft of one side of the cross plate 67, and a worm 63 is fixedly installed on the rotating shaft of one side of the blade 61, a turbine 64 is arranged on the top of the worm 63, and one end of the turbine 64 is connected to the connecting shaft 65, a gear 66 is movably mounted on one end of the connecting shaft 65 away from the turbine 64, and a rack 62 is fixedly mounted inside the housing 4 at the bottom of the gear 66, the rack 62 has the same number of teeth as the gear 66, the worm 63 and the turbine 64 are meshed and connected, the gear 66 includes a tension spring 661, a block 662 and a ratchet 663, the ratchet 663 is fixedly mounted on one end of the connecting shaft 65, the ends of the gear 66 on both sides of the ratchet 663 are hinged with blocks 662, and one side of the block 662 is provided with a tension spring 661, the block 662 is engaged with the ratchet 663 when the gear 66 rotates counterclockwise;

[0032] Reference Figure 4 , Figure 5 , Figure 6 and Figure 8As shown, when the lower mold 51 moves to one side, the gear 66 on its top contacts the rack 62, and because they are meshed, the gear 66 rotates counterclockwise. When rotating counterclockwise, the block 662 engages with the ratchet 663, driving the connecting shaft 65 and the turbine 64 to rotate, so that the worm 63 at the bottom of the turbine 64 rotates, driving the blade 61 connected to the turbine 64 to rotate, and the gate carried on the plastic product outside the upper mold 53 is cut off. The rack 62 and the gear 66 have the same number of teeth, which just makes the gear 66 and the blade 61 rotate one circle to reset. When the lower mold 51 resets and moves, the gear 66 contacts the rack 62 and rotates clockwise, the block 662 and the ratchet 663 disengage and slide, the gear 66 idles, and the blade 61 does not work, thereby reducing labor costs and work intensity, shortening the production cycle, and improving production efficiency.

[0033] A method for preparing an industrial plastic product by injection molding comprises the following steps:

[0034] S1. Add plastic particles from the drying barrel 3, drop them into the inside of the material tube 2, start the heating block 22 to heat and melt them, and start the servo motor 21 to drive the screw 23 to rotate, push the melted plastic material forward, and take it into the lower mold 51 from the nozzle of the material tube 2;

[0035] S2. After the mold cavity between the lower mold 51 and the upper mold 53 is filled with plastic raw materials, the cooling channels in the lower mold 51 and the upper mold 53 are connected to cool the plastic raw materials into a solid. After the temperature drops to a suitable temperature, the air pump on one side of the push plate 54 is started to pull the upper mold 53 away from the lower mold 51 to open the mold;

[0036] S3. When the lower mold 51 moves to one side, the gear 66 on the top contacts the rack 62. Because they are meshed, the gear 66 rotates counterclockwise. When rotating counterclockwise, the block 662 engages with the ratchet 663, driving the connecting shaft 65 and the turbine 64 to rotate, so that the worm 63 at the bottom of the turbine 64 rotates, driving the blade 61 connected to the turbine 64 to rotate, and cutting off the gate carried by the plastic product outside the upper mold 53. The rack 62 and the gear 66 have the same number of teeth, which just allows the gear 66 and the blade 61 to rotate one circle and reset;

[0037] S4. When the blade 61 rotates to reset, the push plate 54 is continuously displaced so that the ejector post 522 is pressed against the protrusion 521, pushing the top plate 52 fixed thereto to move in the opposite direction, driving the ejector pin 524 to penetrate the edge of the upper mold 53, and pushing the plastic product outside it to be demolded. After the demolding is completed, the upper mold 53 returns to its original position, the ejector post 522 moves away from the protrusion 521, and after the top plate 52 loses its thrust, it is reset under the tension of the compression spring 523.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection molding device for industrial plastic products, comprising a workbench (1) and a material pipe (2); Features: A shell (4) is fixedly mounted on one side of the top of the workbench (1), and an injection molding mechanism (5) is arranged inside the shell (4); a cutting mechanism (6) is movably mounted on the top of the injection molding mechanism (5); a material pipe (2) is fixedly mounted on the other side of the top of the workbench (1), and a drying barrel (3) is connected to the top of the material pipe (2); The cutting mechanism (6) comprises a blade (61), a rack (62), a worm (63), a turbine (64), a connecting shaft (65), a gear (66) and a transverse plate (67); The cross plate (67) is bolted to the top of the injection molding mechanism (5); a blade (61) is installed on a rotating shaft on one side of the cross plate (67); a worm (63) is fixedly installed on a rotating shaft on one side of the blade (61); a turbine (64) is arranged on the top of the worm (63); one end of the turbine (64) is connected to a connecting shaft (65); a gear (66) is movably installed on one end of the connecting shaft (65) away from the turbine (64); and a rack (62) is fixedly installed inside the housing (4) at the bottom end of the gear (66).

2. The injection molding device for industrial plastic products according to claim 1, characterized in that: The material pipe (2) comprises a servo motor (21), a heating block (22) and a screw (23); the heating block (22) is wrapped around the surface of the material pipe (2); the screw (23) is installed inside the material pipe (2) in a transversely movable manner; and the servo motor (21) is installed on one side of the screw (23).

3. The injection molding device for industrial plastic products according to claim 1, characterized in that: The injection molding mechanism (5) comprises a lower mold (51), a top plate (52), an upper mold (53) and a push plate (54); the lower mold (51) is fixedly installed on one side inside the housing (4); and the upper mold (53) is movably arranged on one side of the lower mold (51).

4. The injection molding device for industrial plastic products according to claim 3, characterized in that: A push plate (54) is fixedly installed on one side of the upper mold (53) away from the lower mold (51), and a top plate (52) is movably arranged between the push plate (54) and the upper mold (53), and cooling channels are arranged inside the lower mold (51) and the upper mold (53).

5. The injection molding device for industrial plastic products according to claim 4, characterized in that: The top plate (52) comprises a protrusion (521), a top column (522), a compression spring (523) and a top pin (524); the top column (522) is fixedly mounted on one side of the top plate (52); and a side wall of the shell (4) on one side of the top column (522) is fixedly provided with a protrusion (521).

6. The injection molding device for industrial plastic products according to claim 5, characterized in that: An ejector pin (524) is fixedly installed at a corner of one side of the ejector plate (52) opposite to the ejector column (522), and the ejector pin (524) passes through the upper mold (53). A compression spring (523) is wound around the outside of the ejector pin (524).

7. The injection molding device for industrial plastic products according to claim 1, characterized in that: The rack (62) and the gear (66) have the same number of teeth, and the worm (63) and the turbine (64) are meshingly connected.

8. The injection molding device for industrial plastic products according to claim 1, characterized in that: The gear (66) comprises a tension spring (661), a clamping block (662) and a ratchet (663), and the ratchet (663) is fixedly mounted on one end of the connecting shaft (65).

9. An injection molding device for industrial plastic products according to claim 8, characterized in that: One end of the gear (66) on both sides of the ratchet (663) is hinged with a clamping block (662), and one side of the clamping block (662) is provided with a tension spring (661). When the gear (66) rotates counterclockwise, the clamping block (662) is engaged with the ratchet (663).

10. A method for preparing an industrial plastic product by injection molding using the industrial plastic product according to claim 8, comprising the following steps, characterized in that: S1. Add plastic particles from the drying barrel (3) and drop them into the inside of the material tube (2). Start the heating block (22) to heat and melt them. At the same time, start the servo motor (21) to drive the screw (23) to rotate, push the melted plastic material forward, and take it into the lower mold (51) from the nozzle of the material tube (2); S2. After the mold cavity between the lower mold (51) and the upper mold (53) is filled with the plastic raw material, the cooling channels in the lower mold (51) and the upper mold (53) are connected to cool the plastic raw material into a solid. After the temperature drops to a suitable temperature, the air pump on one side of the push plate (54) is started to pull the upper mold (53) away from the lower mold (51) to open the mold; S3. When the lower mold (51) moves to one side, the gear (66) on the top thereof contacts the rack (62), and due to the meshing between them, the gear (66) rotates counterclockwise. When rotating counterclockwise, the block (662) engages with the ratchet (663), driving the connecting shaft (65) and the turbine (64) to rotate, causing the worm (63) at the bottom of the turbine (64) to rotate, driving the blade (61) connected to the turbine (64) to rotate, and cutting off the gate carried by the plastic product outside the upper mold (53). The rack (62) and the gear (66) have the same number of teeth, which just allows the gear (66) and the blade (61) to rotate one circle and reset; S4. When the blade (61) rotates and resets, the push plate (54) continuously moves so that the ejector column (522) and the protrusion (521) are pressed against each other, pushing the ejector plate (52) fixed thereto to move in the opposite direction, driving the ejector pin (524) to penetrate the edge of the upper mold (53), and pushing the plastic product outside thereof to be demolded.

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