Plastic mold surface forming treatment system and method based on in-mold injection molding

Abstract

The invention discloses a plastic mold surface forming treatment system and method based on in-mold injection molding, relates to the technical field of plastic injection molding, and solves the problems that plastic raw materials remaining in an extrusion tank are easily adhered to the interior of the extrusion tank due to temperature loss, and the plastic raw materials cannot be easily extruded during subsequent extrusion operation of a next group of plastic materials. And short flow of the plastic material is easy to occur, so that more empty bags exist in the plastic product after injection molding is completed, and the quality of the plastic product is poor. The plastic mold surface forming treatment system based on in-mold injection molding comprises an extrusion tank, an outer protection tank and a feeding pipeline. According to the plastic material returning device, the spiral material extruding rod can be driven to rotate, advance and retreat through forward and reverse rotation and advance and retreat of the pushing rod, on one hand, pushing and material returning operation of a plastic material can be achieved, and on the other hand, knocking and vibration treatment can be synchronously conducted on the plastic material in the material returning process; and it is guaranteed that the plastic materials are not prone to adhering to the inner wall of the extrusion tank during material returning.

Description

Technical Field

[0001] The invention relates to the technical field of plastic injection molding, in particular to a plastic mold surface molding processing system and method based on in-mold injection molding. Background Art

[0002] Injection molding is a method of producing industrial products. When plastic products are injection molded, the raw materials need to be pre-treated (drying, etc.), melted, extruded, cooled and solidified, and demolded to make plastic particles into plastic products.

[0003] The existing Chinese patent application with application publication number CN115256865A discloses an extruder for injection molding of plastic products, including a cooling box, a screening box is fixedly connected to one side of the cooling box, an extruder body is arranged on one side of the cooling box, a discharge port is opened on one side of the cooling box, a rotating drum is rotatably penetrated through the inner wall of the discharge port, the rotating drum is connected to the discharge end of the extruder body, a collecting box is arranged on one side of the cooling box, and a cooling component for cooling the material is arranged inside the cooling box; the invention can screen the size of the raw material by setting the screening box, avoid larger raw materials from entering the extruder body, and cause blockage or even damage to the machine, greatly extend the service life of the device, and cool the extruded material by multiple fan blades, greatly shortening the working time.

[0004] However, the injection molding device has the following defects when used specifically: 1. When the existing injection molding device is performing injection molding on plastic products, an extruder is required to extrude the molten plastic raw material and transfer the plastic raw material (after heating) to the inside of the injection mold to realize the injection molding of the product. However, after each portion of the plastic raw material is transferred to the inside of the injection mold, in order to ensure the uniformity during the next injection molding, the screw rod of the extruded raw material needs to be withdrawn. At this time, during the withdrawal process, the plastic raw material remaining in the extrusion tank is prone to adhere to the inside of the extrusion tank due to temperature loss. When the next group of plastic materials is subsequently extruded, short flow of the plastic material is prone to occur, resulting in a large number of empty packages inside the plastic product after the injection molding is completed, and the quality of the plastic product is poor; 2. When the existing injection molding device is performing injection molding on plastic products, an extruder is required to transfer the plastic raw materials to the inside of the injection mold through the discharge port. At this time, the traditional extrusion port is generally set to a linear shape, and it is difficult to fill the gaps in the product when injecting the plastic material into the inside of the injection mold. The cooling time and pressure of the plastic when injected into the injection mold are long, and the efficiency of plastic product injection molding is low. Summary of the invention

[0005] The object of the present invention is to provide a plastic mold surface molding processing system and method based on in-mold injection molding to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: The present invention provides a plastic mold surface forming processing system based on in-mold injection molding, comprising an extrusion tank, an outer protective tank and a feeding pipe, wherein the extrusion tank is arranged inside the outer protective tank, the top of one side of the extrusion tank and the outer protective tank are connected with the feeding pipe, the inside of the extrusion tank is provided with a forward and reverse extrusion vibration mechanism extending to the outside, the forward and reverse extrusion vibration mechanism extends to the outside of the outer protective tank, and the outer side of the outer protective tank is provided with a heating component extending to the outside of the extrusion tank, Wherein, the forward and reverse extrusion vibration mechanism includes: A rotary extrusion assembly, the rotary extrusion assembly is mounted on the side of the outer protective tank, the bottom of the rotary extrusion assembly is connected to a spiral extrusion rod, and the spiral extrusion rod is movably arranged inside the extrusion tank; A ratchet assembly is installed on the side of the outer protective tank, a rotating extrusion assembly is arranged inside the ratchet assembly, a lifting and vibration assembly is connected to the bottom of the ratchet assembly, the lifting and vibration assembly is arranged through the outer protective tank, and the top of the lifting and vibration assembly is in contact with the bottom of the extrusion tank.

[0007] As a preferred solution of the present invention, a sealing cover is installed on the outer side of the bottom of the outer protective tank by screws, and a discharge nozzle is installed on the inner side of the sealing cover. Wherein, the discharge nozzle is connected to the bottom of the extrusion tank.

[0008] As a preferred embodiment of the present invention, the rotary extrusion assembly comprises: A side base, the side base is installed on the side of the outer protective tank, a linear electric cylinder is installed on the side of the side base by screws, an output end of the linear electric cylinder is connected to a telescopic disk, and the telescopic disk is movably arranged inside the side base; A push rod is rotatably connected to the side of the telescopic disk, the push rod extends to the inside of the outer protective tank, and a spiral extrusion rod is connected and fixed to the bottom of the push rod.

[0009] As a preferred solution of the present invention, a horizontal groove is provided on the outer side of the push rod, and a first gear is movably connected to the outer side of the push rod through the horizontal groove, and the first gear is rotatably connected to the inner side of the side base. The side surface of the first gear is meshed and connected to the second gear, the second gear is rotatably connected to the inner side of the side base, and the bottom of the second gear is connected to a rotating shaft. The rotating shaft is connected to the output end of the linear motor, the linear motor is installed on the inner side of the side base, and the linear motor is arranged on the side of the push rod. Wherein, the outer side of the push rod is connected with a ratchet assembly through a horizontal groove.

[0010] As a preferred embodiment of the present invention, the ratchet assembly comprises: A one-way ratchet, the one-way ratchet matches the horizontal groove, the one-way ratchet is arranged on the outside of the push rod through the horizontal groove, and the one-way ratchet is rotatably connected to the inner side of the side rotating disk. Wherein, the side turntable is rotatably connected to the side of the outer protective tank; A one-way slider, the one-way slider is slidably connected to the inside of the one-way slide groove part, the one-way slide groove part is installed on the inner side of the side turntable, the inclined surface of the one-way slider matches the inclined surface of the one-way ratchet gear part, and the bottom of the one-way slider is connected to a return spring, and the return spring is installed on the inner wall of the side turntable.

[0011] As a preferred solution of the present invention, an external gear part is installed on the outer side of the side turntable, and a transmission gear is meshedly connected to the bottom of the external gear part, and the transmission gear is rotatably connected to the eccentric part of the side of the outer protective tank. Wherein, the bottom of the transmission gear is meshedly connected with a rotating gear, and the side of the rotating gear is connected with a lifting and vibration component.

[0012] As a preferred embodiment of the present invention, the lifting and vibration assembly comprises: A main rotating rod, the main rotating rod is connected to the side of the rotating gear, the main rotating rod is movably arranged below the outer protective tank, a connecting plate is installed on the side of the main rotating rod, the connecting plate is rotatably connected to the side of the positioning block, and the positioning block is installed at the bottom of the outer protective tank; There are two connection plates, the eccentric parts of the inner sides of the two connection plates are rotatably connected with lifting arms through connecting rods, and the side of the other connection plate is connected with another set of connection plates through a shaft rod, and the lifting arms are arranged through the bottom opening, and the bottom opening is opened at the bottom of the outer protective tank; A knocking rod is rotatably connected to the inner top of the lifting arm, and the knocking rod is movably arranged on the outside of the extrusion tank. A rubber head is detachably installed on the top of the knocking rod, and the top of the rubber head abuts against the bottom of the extrusion tank.

[0013] As a preferred solution of the present invention, guide blocks are connected to the left and right sides of the knocking rod, and the guide blocks are slidably connected to the inside of the guide rod. Wherein, the guide rod is installed between the bottom of the extrusion tank and the inner wall of the outer protective tank, and the guide rod is installed on the side of the bottom opening.

[0014] As a preferred embodiment of the present invention, the heating assembly includes a heating module and a heating spiral tube. The heating module is arranged outside the outer protective tank, the power transmission port of the heating module is electrically connected to a heating spiral tube, and the heating spiral tube extends to the inside of the outer protective tank. Wherein, the heating spiral tube is arranged on the outside of the extrusion tank.

[0015] The present invention also provides a plastic mold surface molding processing method based on in-mold injection molding, comprising the following steps: S1. Preparation and drying of injection molding raw materials: First, select appropriate plastic raw materials according to the product requirements, and dry the prepared injection molding raw materials to reduce the moisture in the injection molding raw materials. Then, pour the dried injection molding raw materials into the extrusion tank through the feed pipe; S2. Melting and injection of injection molding raw materials: The injection molding raw materials poured into the extrusion tank are first heated and melted by the heating component, and the melted plastic raw materials are extruded into the injection mold by rotating the extrusion component to drive the spiral extrusion rod to operate; S3, cooling, solidification and demoulding: The plastic raw material inside the injection mold is cooled by the cooling system inside the injection mold to achieve rapid solidification of the injection raw material, and after the injection material is solidified, it is demoulded to obtain a finished plastic product.

[0016] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects: 1. In the plastic mold surface forming processing system and method based on in-mold injection molding, each time the plastic product is injection molded, it is necessary to push and rotate the plastic material for injection, and to withdraw and rotate the plastic material. At this time, the forward rotation and backward movement of the push rod can drive the spiral extrusion rod to rotate and retreat, which can realize the withdrawal of the plastic material on the one hand, and can synchronously drive multiple knocking rods and rubber heads to move up and down (reciprocating) on ​​the other hand, and knock and vibrate the plastic material during the withdrawal process to ensure that the plastic material is not easy to adhere to the inner wall of the extrusion tank during withdrawal. When the next plastic product is subsequently injection molded, the push rod will rotate in the opposite direction and move forward (the above operation will not drive the knocking rod to operate because the ratchet assembly will not drive the knocking rod to operate), ensuring that short flow or empty packages are not easy to occur during the pushing operation of the plastic material, thereby ensuring the quality of the plastic product after injection molding; 2. In the plastic mold surface forming processing system and method based on in-mold injection molding, through the design of the external stopper of the spiral extruder rod and the injection molding collar on the side of the stopper, when the spiral extruder rod moves forward to push the injection molding material, the injection molding collar will move to the side of the spiral blade outside the spiral extruder rod, expand the contact area between the injection molding collar and the spiral extruder rod, reduce the gap space for material movement and injection, and push the injection molding material to move more evenly, and it is not easy to have the problem that the injection molding material is difficult to fill the inside of the injection mold. When the spiral extruder rod moves backward to return the material, the injection molding collar will move to one side of the stopper, expand the space for the injection molding material to move and return the material, and the injection molding material is easier to return to the outside of the spiral extruder rod. In addition, the stopper and the inner wall of the extrusion tank are in contact during the rotation process. The rotation of the stopper can improve the effect of cleaning the material adhering to the inner wall of the extrusion tank, and prevent the plastic material from adhering to the inner wall of the extrusion tank; 3. In the plastic mold surface forming processing system and method based on in-mold injection molding, the plastic material far away from the heating unit can be heated by the external heating ring of the discharge nozzle, so as to reduce the phenomenon that the plastic material blocks the discharge port due to solidification, or the injection of the plastic material causes short flow due to solidified protrusions, improve the uniformity of the injection molding material during injection, and reduce the problem of empty packages inside the plastic product; 4. In the plastic mold surface forming processing system and method based on in-mold injection molding, multiple discharge ports are obliquely arranged inside the discharge port. On the one hand, the plastic can fully fill the gap when injected into the injection mold to avoid bubbles and defects caused by air trapped in the mold, thereby obtaining a smoother plastic product surface; on the other hand, the oblique movement of the injection material can reduce the cooling time and pressure of the plastic when injected into the mold, reduce the probability of product shrinkage and deformation, ensure the dimensional accuracy and consistency of the product, and improve the quality of the plastic product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the present invention as a whole when viewed from above; Figure 3 It is a schematic structural diagram of the overall cross-section of the present invention; Figure 4 The present invention Figure 3 A schematic diagram of the structure of the enlarged area in the middle A; Figure 5 It is a structural schematic diagram of the cross-section of the connection between the outer protection tank and the heating assembly of the present invention; Figure 6 It is a structural schematic diagram of the cross-section of the connection between the extrusion tank and the forward and reverse extrusion vibration mechanism of the present invention; Figure 7 It is a structural schematic diagram of the reverse extrusion vibration mechanism of the present invention; Figure 8 The present invention Figure 7 Schematic diagram of the structure of the enlarged area B in the middle; Fig. 9 It is a schematic structural diagram of the connection between the push rod and the ratchet assembly of the present invention; Fig.10 It is a schematic diagram of the structure of the connection between the rotating gear and the lifting and vibrating assembly of the present invention; Fig.11 It is a schematic structural diagram of the connection between the spiral extrusion rod and the injection molding sleeve ring of the present invention; Fig.12 It is a structural schematic diagram of the cross-section of the connection between the sealing cover and the discharge nozzle of the present invention; Fig.13 The present invention Fig.12 Schematic diagram of the structure of the enlarged C area; In the figure: 10. Extrusion tank; 20. External protective tank; 200. Sealing cover; 201. Discharge nozzle; 30. Feeding pipe; 40. Forward and reverse extrusion vibration mechanism; 50, rotary extrusion assembly; 500, spiral extrusion rod; 501, side base; 502, linear electric cylinder; 503, telescopic plate; 504, push rod; 5041, horizontal slot; 5042, first gear; 5043, second gear; 5044, rotary shaft; 5045, linear motor; 60, ratchet assembly; 601, one-way ratchet; 602, side turntable; 6021, external gear portion; 6022, transmission gear; 6023, rotating gear; 603, one-way slider; 604, one-way slide groove portion; 605, return spring; 70, lifting vibration assembly; 701, main rotating rod; 702, connecting plate; 7020, slave shaft rod; 7021, positioning block; 703, lifting arm; 704, bottom opening; 705, knocking rod; 7051, guide block; 7052, guide rod; 706, rubber head; 80. Heating assembly; 801. Heating module; 802. Heating spiral tube; 90, stopper; 901, injection molding collar; 100, outer sleeve ring; 1001, discharge port; 1002, heating ring; 1003, battery module. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application. Embodiment 1

[0021] See also Figure 1-Figure 10 The surface forming processing system of a plastic mold based on in-mold injection molding includes an extrusion tank 10, an outer protective tank 20 and a feeding pipe 30. The extrusion tank 10 is arranged inside the outer protective tank 20. The top of the extrusion tank 10 and the outer protective tank 20 are connected with the feeding pipe 30. The interior of the extrusion tank 10 is provided with a forward and reverse extrusion vibration mechanism 40 extending to the outside. The forward and reverse extrusion vibration mechanism 40 extends to the outside of the outer protective tank 20. The outer side of the outer protective tank 20 is provided with a heating component 80 extending to the outside of the extrusion tank 10. The forward and reverse extrusion vibration mechanism 40 includes A rotary extrusion assembly 50 is installed on the side of the outer protective tank 20, and a spiral extrusion rod 500 is connected to the bottom of the rotary extrusion assembly 50, and the spiral extrusion rod 500 is movably arranged inside the extrusion tank 10; a ratchet assembly 60 is installed on the side of the outer protective tank 20, and the rotary extrusion assembly 50 is penetrated inside the ratchet assembly 60, and a lifting and vibration assembly 70 is connected to the bottom of the ratchet assembly 60, and the lifting and vibration assembly 70 is set through the outer protective tank 20, and the top of the lifting and vibration assembly 70 is in contact with the extrusion tank 10 directly below.

[0022] In the present invention, a sealing cover 200 is installed on the outer side of the bottom of the outer protective tank 20 by screws, and a discharge nozzle 201 is installed on the inner side of the sealing cover 200 , wherein the discharge nozzle 201 is connected to the bottom of the extrusion tank 10 .

[0023] The above working principle: when the plastic product is injection molded, the dried plastic material will be poured into the interior of the extrusion tank 10 through the feed pipe 30, and the heating and melting of the plastic material will be completed through the heating component 80. Then, the rotating extrusion component 50 is started to drive the spiral extrusion rod 500 to operate, and drive the melted plastic material to rotate and move, move the plastic material to one side of the discharge nozzle 201, and move the plastic material to the inside of the injection mold through the discharge nozzle 201 to achieve the injection molding operation of the plastic material. When the injection molding material is injected, the rotating extrusion component 50 drives the spiral extrusion rod 500 to operate in the reverse direction, pushing the injection molding material to move to one side of the discharge nozzle 201. After completing an injection molding operation, the rotary extrusion assembly 50 needs to operate in the forward direction to realize the material return processing of the injection molding material. In the process of returning the material, the lifting and vibration assembly 70 is driven by the ratchet assembly 60 to operate to vibrate the plastic raw materials in the process of pushing the material, thereby reducing the probability of the heated and softened plastic material sticking to the inside of the extrusion tank 10 due to the decrease in temperature during pushing the material, thereby ensuring the efficiency of the processing and production of the plastic products and the quality of the plastic products after processing.

[0024] Specific reference Figure 7 and Figure 8 The rotary extrusion assembly 50 includes a side base 501, which is installed on the side of the outer protective tank 20. A linear electric cylinder 502 is installed on the side of the side base 501 by screws. The output end of the linear electric cylinder 502 is connected to a telescopic disk 503, and the telescopic disk 503 is movably arranged inside the side base 501; a push rod 504, which is rotatably connected to the side of the telescopic disk 503, and the push rod 504 extends to the inside of the outer protective tank 20. The bottom of the push rod 504 is connected and fixed with a spiral extrusion rod 500.

[0025] In this solution, a horizontal groove 5041 is opened on the outer side of the pushing rod 504, and the outer side of the pushing rod 504 is movably connected to the first gear 5042 through the horizontal groove 5041, and the first gear 5042 is rotatably connected to the inner side of the side base 501, wherein the side of the first gear 5042 is meshed and connected to the second gear 5043, and the second gear 5043 is rotatably connected to the inner side of the side base 501, and the bottom of the second gear 5043 is connected to a rotating shaft 5044, wherein the rotating shaft 5044 is connected to the output end of the linear motor 5045, and the linear motor 5045 is installed on the inner side of the side base 501, and the linear motor 5045 is arranged on the side of the pushing rod 504, wherein the outer side of the pushing rod 504 is connected to the ratchet assembly 60 through the horizontal groove 5041.

[0026] In the above scheme, when the spiral extrusion rod 500 is driven to rotate and the extrusion operation of the plastic material is realized, the linear motor 5045 is started to operate, driving the rotating shaft 5044 connected to the output end of the linear motor 5045 to rotate, and causing the second gear 5043 connected to the side of the rotating shaft 5044 to rotate. When the second gear 5043 rotates, the first gear 5042 meshed with the side thereof rotates, causing the push rod 504 connected to the inside of the first gear 5042 through the horizontal groove 5041 to rotate, so that the spiral extrusion rod 500 connected to the bottom of the push rod 504 can rotate. At the same time, due to the design of the horizontal groove 5041, the push rod 504 can move horizontally inside the first gear 5042.

[0027] In the plastic mold surface forming processing system based on in-mold injection molding of the present invention, when the injection molding material is driven to move horizontally to achieve the injection of the injection molding material, the linear electric cylinder 502 is started to operate, driving the push rod 504 connected to the output end of the linear electric cylinder 502 through the telescopic disk 503 to move horizontally, driving the spiral extrusion rod 500 connected to the bottom of the push rod 504 to move.

[0028] Specific reference Fig. 9 The ratchet assembly 60 includes a one-way ratchet 601, which matches the horizontal groove 5041. The one-way ratchet 601 is arranged on the outer side of the push rod 504 through the horizontal groove 5041. The one-way ratchet 601 is rotatably connected to the inner side of the side turntable 602, wherein the side turntable 602 is rotatably connected to the side of the outer protective tank 20; a one-way slider 603, which is slidably connected to the inside of the one-way slide groove portion 604, and the one-way slide groove portion 604 is installed on the inner side of the side turntable 602. The inclined surface of the one-way slider 603 matches the inclined surface of the gear part of the one-way ratchet 601. The bottom of the one-way slider 603 is connected to a reset spring 605, and the reset spring 605 is installed on the inner wall of the side turntable 602.

[0029] In this solution, an external gear part 6021 is installed on the outer side of the side turntable 602, and the bottom of the external gear part 6021 is meshedly connected with a transmission gear 6022, and the transmission gear 6022 is rotatably connected to the eccentric part of the side of the outer protective tank 20, wherein the bottom of the transmission gear 6022 is meshedly connected with a rotating gear 6023, and the side of the rotating gear 6023 is connected to the lifting and vibration assembly 70.

[0030] In the above scheme, when the side turntable 602 rotates, the outer gear part 6021 arranged on the outer side thereof drives the transmission gear 6022 meshingly connected to the outer side thereof to rotate, and causes the rotating gear 6023 meshingly connected to the bottom of the transmission gear 6022 to rotate.

[0031] In the plastic mold surface forming processing system based on in-mold injection molding of the present invention, when the push rod 504 rotates, the one-way ratchet 601 connected to the outside through the horizontal groove 5041 will rotate. At this time, when the one-way ratchet 601 rotates forward, the horizontal surface of its gear part will contact the horizontal surface of the one-way slider 603, and drive the side turntable 602 connected to the outside of the one-way slider 603 through the one-way slide groove part 604 to rotate. When the one-way ratchet 601 rotates reversely, the inclined surface of its gear part will contact the inclined surface of the one-way slider 603, and the one-way ratchet 601 pushes the one-way slider 603 to move, ensuring that the side turntable 602 will not rotate when the one-way ratchet 601 rotates.

[0032] Specific reference Fig.10 The lifting vibration assembly 70 includes a main rotating rod 701, which is connected to the side of the rotating gear 6023, and the main rotating rod 701 is movably arranged below the outer protective tank 20. A connecting plate 702 is installed on the side of the main rotating rod 701, and the connecting plate 702 is rotatably connected to the side of the positioning block 7021, and the positioning block 7021 is installed at the bottom of the outer protective tank 20; wherein, there are two connecting plates 702, and the eccentric parts of the inner sides of the two connecting plates 702 are rotatably connected to the lifting arm 70 through a connecting rod. 3. The side of another connecting plate 702 is connected with another set of connecting plates 702 through the shaft rod 7020. The lifting arm 703 is set through the bottom opening 704, and the bottom opening 704 is opened at the bottom of the outer protective tank 20; the knocking rod 705 is rotatably connected to the inner top of the lifting arm 703, and the knocking rod 705 is movably set on the outside of the extrusion tank 10. The top of the knocking rod 705 is detachably installed with a rubber head 706, and the top of the rubber head 706 abuts against the bottom of the extrusion tank 10.

[0033] In this solution, guide blocks 7051 are connected to the left and right sides of the knocking rod 705, and the guide blocks 7051 are slidably connected to the inside of the guide rod 7052, wherein the guide rod 7052 is installed between the bottom of the extrusion tank 10 and the inner wall of the outer protective tank 20, and the guide rod 7052 is installed on the side of the bottom opening 704.

[0034] In the plastic mold surface forming processing system based on in-mold injection molding of the present invention, when the rotating gear 6023 rotates (during the material withdrawal process), the main rotating rod 701 connected to its side will drive the connecting disk 702 connected to its side to rotate, and drive the lifting arm 703 connected to the eccentric part of the connecting disk 702 through the connecting rod to operate. When the lifting arm 703 is in operation, the knocking rod 705 connected to the top of the lifting arm 703 will slide inside the guide rod 7052 through the guide blocks 7051 connected to the left and right sides, ensuring that the rubber head 706 on the top of the knocking rod 705 can move up and down (reciprocating), vibrating and knocking multiple positions at the bottom of the extrusion tank 10, reducing the probability of the injection material adhering to the inner wall of the extrusion tank 10.

[0035] Specific reference Figure 5 The heating assembly 80 includes a heating module 801 and a heating spiral tube 802, wherein the heating module 801 is arranged on the outside of the outer protective tank 20, the power transmission port of the heating module 801 is electrically connected to the heating spiral tube 802, and the heating spiral tube 802 extends to the inside of the outer protective tank 20, wherein the heating spiral tube 802 is arranged on the outside of the extrusion tank 10.

[0036] In the plastic mold surface forming processing system based on in-mold injection molding of the present invention, before injecting the plastic material, the injection molding material needs to be heated and softened to complete the injection operation of the plastic material. At this time, the heating module 801 can drive the heating spiral tube 802 to operate, generating heat to continuously heat more than 10 positions of the extrusion tank set inside it, thereby improving the efficiency of heating and softening the injection molding material. At the same time, the spirally arranged heating spiral tube 802 can heat multiple positions in more than 10 directions of the extrusion tank, thereby improving the effect of heating and softening the injection molding material. Embodiment 2

[0037] On the basis of the above-mentioned embodiments, it is found during use that when the spiral extrusion rod 500 is driven backward to realize the material withdrawal operation of the injection molding material, the plastic material is difficult to move, and most of the material is likely to remain behind the discharge nozzle 201 and solidify, resulting in obstruction and empty packages when the next group of plastic materials are extruded; when the spiral extrusion rod 500 rotates and moves, pushing the injection molding material to the inside of the injection mold, the structure of the spiral extrusion rod 500 will leave a large number of gaps (inside the injection molding material). At this time, the subsequent injection molding material has a weak driving force on the front and rear injection molding materials, and the injection molding material is difficult to fill the inside of the injection mold. The quality of the plastic product after the injection molding is low.

[0038] For this purpose, refer specifically to Fig.11A plurality of blocks 90 are installed on the outer side of the bottom of the spiral extrusion rod 500, and the block 90 abuts against the inner wall of the extrusion tank 10. The side of the block 90 is provided with an injection molding ring 901 which is slidably connected to the outside of the spiral extrusion rod 500. The injection molding ring 901 is arranged on the side of the spiral blade outside the spiral extrusion rod 500, and the injection molding ring 901 is slidably connected to the inner wall of the extrusion tank 10.

[0039] In the plastic mold surface forming processing system based on in-mold injection molding of the present invention, when the spiral extruder rod 500 moves forward to push the injection material, the injection collar 901 will move to one side of the spiral blade outside the spiral extruder rod 500. At this time, the contact area between the injection collar 901 and the spiral extruder rod 500 is large, and the gap for material movement and injection is small, so it is not easy to cause the injection material to be difficult to fill the inside of the injection mold. When the spiral extruder rod 500 moves backward to withdraw the material, the injection collar 901 will move to one side of the block 90, opening the space for the injection material to move and withdraw the material, and the injection material is more easily returned to one side of the spiral extruder rod 500. Embodiment 3

[0040] On the basis of the above-mentioned embodiment, it is found during use that the injection molding material remaining inside the discharge nozzle 201 (the excess residue from the previous injection molding) is far away from the part where the injection molding material is heated. Therefore, the injection molding material is easy to solidify when the injected plastic raw material is cooled, solidified and demolded. When the next group of injection molding materials is extruded, the injection molding material is easy to short flow (due to the protrusion of solidification).

[0041] For this purpose, refer specifically to Fig.12 and Fig.13 An outer ring 100 is installed on the inner side of the bottom of the discharge nozzle 201 by screws. A plurality of discharge ports 1001 are opened at the inner bottom of the outer ring 100. The discharge ports 1001 are arranged obliquely. A heating ring 1002 is sleeved on the outer side of the outer ring 100. A heating unit is arranged inside the heating ring 1002. The heating unit is connected to the battery module 1003 through a wire. The battery module 1003 is installed on the side of the sealing cover 200.

[0042] In the plastic mold surface forming processing system based on in-mold injection molding of the present invention, when the injection molding material moves to the inside of the discharge port 1001, the battery module 1003 can drive the heating ring 1002 to operate, and the injection molding material inside the heating ring 1002 can be continuously heated to ensure that the injection molding material close to the side of the injection mold will not solidify due to the temperature. Among them, multiple obliquely arranged discharge ports 1001, on the one hand, can make the plastic fully fill the gap when injected into the mold, avoid bubbles and defects caused by air trapped in the mold, so as to obtain a smoother product surface; on the other hand, through the oblique movement of the injection molding material, the cooling time and pressure of the plastic when injected into the mold can be reduced, the probability of shrinkage and deformation of the product can be reduced, and the dimensional accuracy and consistency of the product can be ensured. Embodiment 4

[0043] See also Figure 1-Figure 11 , a plastic mold surface molding processing method based on in-mold injection molding includes the following steps: S1. Preparation and drying of injection molding raw materials: First, select appropriate plastic raw materials according to the product requirements of the production and processing, and dry the prepared injection molding raw materials to reduce the moisture in the injection molding raw materials, and then pour the dried injection molding raw materials into the interior of the extrusion tank 10 through the feed pipe 30; S2, melting and injection of injection molding raw materials: the injection molding raw materials poured into the extrusion tank 10 are first heated and melted by the heating component 80, and the melted plastic raw materials are extruded into the interior of the injection mold by rotating the extrusion component 50 to drive the spiral extrusion rod 500 to operate; S3, cooling, solidification and demoulding: The plastic raw material inside the injection mold is cooled by the cooling system inside the injection mold to achieve rapid solidification of the injection raw material, and after the injection material is solidified, it is demoulded to obtain a finished plastic product.

[0044] Without limitation, any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent substitutions or changes according to the technical solution and inventive concept of the present invention, should be covered by the protection scope of the present invention.

Claims

1. A plastic mold surface forming processing system based on in-mold injection molding, comprising an extrusion tank (10), an outer protective tank (20) and a feed pipe (30), wherein the extrusion tank (10) is arranged inside the outer protective tank (20), and the top of one side of the extrusion tank (10) and the outer protective tank (20) are connected with the feed pipe (30), characterized in that: The extrusion tank (10) is provided with a forward and reverse extrusion vibration mechanism (40) extending to the outside, the forward and reverse extrusion vibration mechanism (40) extending to the outside of the outer protective tank (20), and the outer side of the outer protective tank (20) is provided with a heating component (80) extending to the outside of the extrusion tank (10). Wherein, the forward and reverse extrusion vibration mechanism (40) comprises: A rotary extrusion assembly (50), the rotary extrusion assembly (50) being mounted on a side of the outer protective tank (20), the bottom of the rotary extrusion assembly (50) being connected to a spiral extrusion rod (500), the spiral extrusion rod (500) being movably arranged inside the extrusion tank (10); A ratchet assembly (60) is mounted on a side of the outer protective tank (20), a rotary extrusion assembly (50) is provided inside the ratchet assembly (60), a lifting and vibration assembly (70) is connected to the bottom of the ratchet assembly (60), the lifting and vibration assembly (70) is provided through the outer protective tank (20), and the top of the lifting and vibration assembly (70) abuts against the bottom of the extrusion tank (10).

2. The plastic mold surface forming processing system based on in-mold injection molding according to claim 1, characterized in that: A sealing cover (200) is installed on the outer side of the bottom of the outer protective tank (20) by means of screws, and a discharge nozzle (201) is installed on the inner side of the sealing cover (200). Wherein, the discharge nozzle (201) is connected to the bottom of the extrusion tank (10).

3. The plastic mold surface forming processing system based on in-mold injection molding according to claim 1, characterized in that: The rotary extrusion assembly (50) comprises: A side base (501), the side base (501) being mounted on a side surface of the outer protective tank (20), a linear electric cylinder (502) being mounted on the side surface of the side base (501) by means of screws, an output end of the linear electric cylinder (502) being connected to a telescopic disk (503), and the telescopic disk (503) being movably arranged inside the side base (501); A push rod (504) is rotatably connected to the side of the telescopic disk (503), the push rod (504) extends to the inside of the outer protective tank (20), and the bottom of the push rod (504) is connected and fixed with a spiral extrusion rod (500).

4. The plastic mold surface forming processing system based on in-mold injection molding according to claim 3 is characterized in that: A horizontal groove (5041) is formed on the outer side of the push rod (504), and a first gear (5042) is movably connected to the outer side of the push rod (504) through the horizontal groove (5041). The first gear (5042) is rotatably connected to the inner side of the side base (501). The side surface of the first gear (5042) is meshedly connected to the second gear (5043), the second gear (5043) is rotatably connected to the inner side of the side base (501), and the bottom of the second gear (5043) is connected to a rotating shaft (5044). The rotating shaft (5044) is connected to the output end of the linear motor (5045), the linear motor (5045) is installed on the inner side of the side base (501), and the linear motor (5045) is arranged on the side of the pushing rod (504). The outer side of the push rod (504) is connected to a ratchet assembly (60) via a horizontal groove (5041).

5. The plastic mold surface forming processing system based on in-mold injection molding according to claim 4, characterized in that: The ratchet assembly (60) comprises: a one-way ratchet (601), the one-way ratchet (601) matching the horizontal slot (5041), the one-way ratchet (601) being arranged on the outside of the push rod (504) through the horizontal slot (5041), the one-way ratchet (601) being rotatably connected to the inside of the side rotating disk (602), Wherein, the side rotating disk (602) is rotatably connected to the side of the outer protective tank (20); A one-way slider (603), wherein the one-way slider (603) is slidably connected to the inside of a one-way slide groove portion (604), wherein the one-way slide groove portion (604) is mounted on the inner side of the side rotating disk (602), wherein the inclined surface of the one-way slider (603) matches the inclined surface of the gear portion of the one-way ratchet (601), and a return spring (605) is connected to the bottom of the one-way slider (603), wherein the return spring (605) is mounted on the inner wall of the side rotating disk (602).

6. The plastic mold surface forming processing system based on in-mold injection molding according to claim 5, characterized in that: An external gear portion (6021) is installed on the outer side of the side rotating disk (602), and a transmission gear (6022) is meshedly connected to the bottom of the external gear portion (6021), and the transmission gear (6022) is rotatably connected to an eccentric portion of the side of the outer protective tank (20). The bottom of the transmission gear (6022) is meshingly connected with a rotating gear (6023), and the side of the rotating gear (6023) is connected with a lifting and vibration assembly (70).

7. The plastic mold surface forming processing system based on in-mold injection molding according to claim 6, characterized in that: The lifting and vibration assembly (70) comprises: A main rotating rod (701), the main rotating rod (701) being connected to a side of the rotating gear (6023), the main rotating rod (701) being movably arranged below the outer protective tank (20), a connecting plate (702) being installed on the side of the main rotating rod (701), the connecting plate (702) being rotatably connected to a side of a positioning block (7021), and the positioning block (7021) being installed at the bottom of the outer protective tank (20); There are two connection plates (702), the eccentric parts of the inner sides of the two connection plates (702) are rotatably connected to the lifting arms (703) via connecting rods, the side of the other connection plate (702) is connected to another set of connection plates (702) via a shaft (7020), the lifting arms (703) are arranged to pass through the bottom opening (704), and the bottom opening (704) is opened at the bottom of the outer protective tank (20); A knocking rod (705) is rotatably connected to the inner top of the lifting arm (703), and the knocking rod (705) is movably arranged on the outer side of the extrusion tank (10). A rubber head (706) is detachably mounted on the top of the knocking rod (705), and the top of the rubber head (706) abuts against the bottom of the extrusion tank (10).

8. The plastic mold surface forming processing system based on in-mold injection molding according to claim 7, characterized in that: The left and right sides of the knocking rod (705) are connected to guide blocks (7051), and the guide blocks (7051) are slidably connected to the inside of the guide rod (7052). The guide rod (7052) is installed between the bottom of the extrusion tank (10) and the inner wall of the outer protective tank (20), and the guide rod (7052) is installed on the side of the bottom opening (704).

9. The plastic mold surface forming processing system based on in-mold injection molding according to claim 1, characterized in that: The heating component (80) comprises a heating module (801) and a heating spiral tube (802). The heating module (801) is arranged outside the outer protective tank (20), the power transmission port of the heating module (801) is electrically connected to a heating spiral tube (802), and the heating spiral tube (802) extends to the inside of the outer protective tank (20). Wherein, the heating spiral tube (802) is arranged on the outside of the extrusion tank (10).

10. A plastic mold surface forming processing method based on in-mold injection molding, for a plastic mold surface forming processing system based on in-mold injection molding according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Preparation and drying of injection molding raw materials: first, selecting appropriate plastic raw materials according to the product requirements of the production and processing, and drying the prepared injection molding raw materials to reduce the moisture in the injection molding raw materials, and then pouring the dried injection molding raw materials into the interior of the extrusion tank (10) through the feed pipe (30); S2. Melting and injecting the injection molding raw material: the injection molding raw material poured into the extrusion tank (10) is first heated and melted by the heating component (80), and then the melted plastic raw material is extruded into the interior of the injection mold by rotating the extrusion component (50) to drive the spiral extrusion rod (500); S3, cooling, solidification and demoulding: The plastic raw material inside the injection mold is cooled by the cooling system inside the injection mold to achieve rapid solidification of the injection raw material, and after the injection material is solidified, it is demoulded to obtain a finished plastic product.

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