Plastic Mold Surface Forming Treatment System and Method Based on In-Mold Injection Molding

Abstract

The present invention discloses a surface forming treatment system and method for plastic molds based on in-mold injection, which relates to the technical field of plastic injection molding. It solves the problem that the plastic raw materials remaining inside the extrusion tank are easily adhered to the inside of the extrusion tank due to heat loss. When subsequent extrusion operations are performed on the next set of plastic materials, short flow of the plastic materials is likely to occur, resulting in a large number of internal voids in the plastic products after injection molding and poor quality of the plastic products. The surface forming treatment system for plastic molds based on in-mold injection includes an extrusion tank, an outer protective tank, and a feeding pipe. In the present invention, by the forward and reverse rotation and the forward and backward movement of the push rod, the spiral extrusion rod can be driven to rotate, move forward and backward. On the one hand, the pushing and discharging operations of the plastic materials can be respectively realized. On the other hand, during the discharging process, the plastic materials can be synchronously subjected to knocking and vibration treatment to ensure that the plastic materials are not easily adhered to the inner wall of the extrusion tank when being discharged.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic injection molding, and specifically to a surface forming treatment system and method for plastic molds based on in-mold injection molding. Background Art

[0002] Injection molding is a method for manufacturing industrial product shapes. When processing plastic products by injection molding, it is necessary to pass the injection molding raw materials through processes such as pretreatment (drying, etc.), melting, extrusion, cooling and solidification, and demolding to form plastic products from plastic pellets.

[0003] The existing Chinese patent application with the publication number CN115256865A discloses an extruder for plastic product injection molding, including a cooling box. One side of the cooling box is fixedly connected with a screening box. One side of the cooling box is provided with an extruder body. One side of the cooling box is provided with a discharge port. A rotating cylinder is rotatably penetrated through the inner wall of the discharge port. The rotating cylinder is communicated with the discharge end of the extruder body. One side of the cooling box is provided with a collection box. A cooling component for cooling the material is arranged inside the cooling box. In this invention, by setting the screening box, the size of the raw materials can be screened to prevent larger raw materials from entering the inside of the extruder body, which may cause blockage or even damage to the machine, greatly prolonging the service life of the device. At the same time, the extruded material is cooled by multiple fan blades, significantly shortening the working time.

[0004] However, the injection molding device has the following defects during specific use:

[0005] 1. When the existing injection molding device processes plastic products by injection molding, it is necessary for the extruder to perform an extrusion process on the melted plastic raw materials and transfer the plastic raw materials (after heating) to the inside of the injection mold to complete the injection operation of the product. However, after each transfer of a part of the plastic raw materials to the inside of the injection mold, in order to ensure the uniformity during the next injection, it is necessary to perform a material withdrawal process on the screw of the extruded raw materials. At this time, during the material withdrawal process, the plastic raw materials remaining inside the extrusion tank are likely to adhere to the inside of the extrusion tank due to temperature loss. During the subsequent extrusion operation of the next group of plastic materials, plastic material short flow is likely to occur, resulting in more internal voids in the plastic products after injection molding and poor quality of the plastic products.

[0006] 2. When the existing injection molding device processes plastic products by injection molding, it is necessary for the extruder 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 in a straight line, and it is difficult to fill the voids of the product when injecting the plastic material into the inside of the injection mold. The cooling time and pressure of the plastic during injection into the injection mold are relatively long, and the injection molding efficiency of the plastic products is low. Summary of the Invention

[0007] The object of the present invention is to provide a surface forming treatment system and method for plastic molds based on in-mold injection molding to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above-mentioned invention object, the present invention adopts the following technical solutions:

[0009] The present invention provides a surface forming treatment system for plastic molds based on in-mold injection molding, including an extrusion tank, an outer protection tank and a feeding pipeline. The extrusion tank is arranged inside the outer protection tank. The top of one side of the extrusion tank and the outer protection tank is communicated with a feeding pipeline. A positive and negative rotation extrusion vibration mechanism extending to the outside is arranged inside the extrusion tank. The positive and negative rotation extrusion vibration mechanism extends to the outside of the outer protection tank. A heating component extending to the outside of the extrusion tank is arranged on the outside of the outer protection tank.

[0010] Among them, the positive and negative rotation extrusion vibration mechanism includes:

[0011] A rotary extrusion component, the rotary extrusion component is installed on the side of the outer protection tank. A spiral feeding rod is connected to the bottom of the rotary extrusion component. The spiral feeding rod is movably arranged inside the extrusion tank.

[0012] A ratchet component, the ratchet component is installed on the side of the outer protection tank. The rotary extrusion component penetrates through the inside of the ratchet component. A lifting vibration component is connected to the bottom of the ratchet component. The lifting vibration component penetrates through the outer protection tank. The top of the lifting vibration component abuts directly below the extrusion tank.

[0013] As a preferred solution of the present invention, a sealing cover is installed on the outside of the bottom of the outer protection tank through screws. A discharge nozzle is assembled inside the sealing cover.

[0014] Among them, the discharge nozzle is connected to the bottom of the extrusion tank.

[0015] As a preferred solution of the present invention, the rotary extrusion component includes:

[0016] A side base, the side base is installed on the side of the outer protection tank. A linear electric cylinder is installed on the side of the side base through screws. The output end of the linear electric cylinder is connected to a telescopic disc. The telescopic disc is movably arranged inside the side base.

[0017] A push rod, the push rod is rotatably connected to the side of the telescopic disc. The push rod extends into the outer protection tank. A spiral feeding rod is fixedly connected to the bottom of the push rod.

[0018] As a preferred solution of the present invention, a horizontal groove is opened on the outside of the push rod. A first gear is movably connected to the outside of the push rod through the horizontal groove. The first gear is rotatably connected to the inside of the side base.

[0019] Among them, the side of the first gear is meshed and connected to the second gear. The second gear is rotatably connected to the inside of the side base, and a rotating shaft is connected to the bottom of the second gear.

[0020] Among them, the rotating shaft is connected to the output end of the linear motor. The linear motor is installed inside the side base and is arranged on the side of the push rod.

[0021] Among them, a ratchet assembly is connected to the outside of the push rod through a horizontal groove.

[0022] As a preferred solution of the present invention, the ratchet assembly includes:

[0023] A one-way ratchet, which is matched with the horizontal groove. The one-way ratchet is arranged on the outside of the push rod through the horizontal groove and is rotatably connected to the inside of the side turntable.

[0024] Among them, the side turntable is rotatably connected to the side of the outer protective tank;

[0025] A one-way slider, which is slidably connected to the inside of the one-way chute part. The one-way chute part is installed inside the side turntable. The inclined surface of the one-way slider is matched with the inclined surface of the one-way ratchet gear part. A return spring is connected to the bottom of the one-way slider, and the return spring is installed at the inner wall of the side turntable.

[0026] As a preferred solution of the present invention, an outer gear part is installed on the outside of the side turntable. The bottom of the outer gear part is meshed and connected to a transmission gear, and the transmission gear is rotatably connected to the eccentric part on the side of the outer protective tank.

[0027] Among them, the bottom of the transmission gear is meshed and connected to a rotating gear, and a lifting and vibrating assembly is connected to the side of the rotating gear.

[0028] As a preferred solution of the present invention, the lifting and vibrating assembly includes:

[0029] A main rotating rod, which is connected to the side of the rotating gear. The main rotating rod is movably arranged below the outer protective tank. A connecting disk is installed on the side of the main rotating rod, and the connecting disk is rotatably connected to the side of the positioning block. The positioning block is installed at the bottom of the outer protective tank;

[0030] Among them, there are two connecting disks. The eccentric parts inside the two connecting disks are rotatably connected to a lifting arm through a connecting rod. The side of the other connecting disk is connected to another set of connecting disks through a secondary shaft rod. The lifting arm passes through the bottom opening, and the bottom opening is opened at the bottom of the outer protective tank;

[0031] The knocking rod is rotatably connected to the inner top of the lifting arm. The knocking rod is movably arranged outside the extrusion tank. A rubber head is detachably installed at the top of the knocking rod, and the top of the rubber head abuts against the lower part of the extrusion tank.

[0032] 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 inside the guide rods.

[0033] Among them, the guide rods are installed between the bottom of the extrusion tank and the inner wall of the outer protective tank, and the guide rods are installed on the side of the bottom opening.

[0034] As a preferred solution of the present invention, the heating assembly includes a heating module and a heating spiral tube.

[0035] Among them, 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 into the inner part of the outer protective tank.

[0036] Among them, the heating spiral tube is arranged outside the extrusion tank.

[0037] The present invention also provides a surface forming treatment method for a plastic mold based on in-mold injection molding, including the following steps:

[0038] S1. Preparation and drying of injection molding raw materials: First, select suitable plastic raw materials according to the product requirements of production and processing, and perform drying treatment on 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 inside of the extrusion tank through the feeding pipeline.

[0039] S2. Melting and injection of injection molding raw materials: The injection molding raw materials poured into the inside of the extrusion tank are first heated and melted by the heating assembly, and the melted plastic raw materials are extruded into the inside of the injection mold by driving the spiral extrusion rod to operate through the rotary extrusion assembly.

[0040] S3. Cooling, curing and demolding: The plastic raw materials located inside the injection mold are cooled through the cooling system inside the injection mold to achieve rapid curing of the injection molding raw materials. And after the injection molding materials are cured, demolding treatment is carried out to obtain finished plastic products.

[0041] Compared with the prior art, the above one or more technical solutions have the following beneficial effects:

[0042] 1. In the surface forming treatment system and method for plastic molds based on in-mold injection molding, each time an injection operation is performed on a plastic product, it is necessary to separately perform the pushing and rotating injection operations of the plastic material, as well as the material discharging and rotating operations of the plastic material. At this time, through the forward rotation and backward movement of the push rod, the spiral extrusion rod can be driven to rotate and retreat. On the one hand, the material discharging operation of the plastic material is realized. On the other hand, multiple knocking rods and rubber heads can be synchronously driven to move up and down (reciprocating movement), and the plastic material during the material discharging process is subjected to knocking and vibration treatment to ensure that the plastic material is not easily adhered to the inner wall of the extrusion tank during material discharging. When the next plastic product is subjected to the injection operation, the push rod will perform the operations of reverse rotation and forward movement (the above operations will not drive the knocking rod to operate because of the ratchet assembly), ensuring that the pushing operation of the plastic material is not easily short-circuited or air pockets are generated, and ensuring the quality of the plastic product after injection;

[0043] 2. In the surface forming treatment system and method for plastic molds based on in-mold injection molding, through the design of the external block of the spiral extrusion rod and the injection sleeve ring on the side of the block, when the spiral extrusion rod moves forward to perform the pushing operation of the injection material, the injection sleeve ring will move to one side of the external spiral blade of the spiral extrusion rod, expanding the contact area between the injection sleeve ring and the spiral extrusion rod, reducing the gap space for the material to move and inject, making the movement of the injection material more uniform and not easily having the problem that the injection material is difficult to fill the inside of the injection mold. When the spiral extrusion rod moves backward to perform the material discharging operation, the injection sleeve ring will move to one side of the block, expanding the space for the injection material to move and retreat, and the injection material is more easily retreated to the outside of the spiral extrusion rod. And during the rotation process, the block is in contact with the inner wall of the extrusion tank, and the cleaning effect of the adhered material on the inner wall of the extrusion tank can be improved by the rotation of the block, avoiding the adhesion of the plastic material to the inner wall of the extrusion tank;

[0044] 3. In the surface forming treatment system and method for plastic molds based on in-mold injection molding, through the heating ring outside the discharge nozzle, the plastic material far from the heating unit can be heated, reducing the blockage of the discharge port caused by the curing of the plastic material or the short-circuit of the injection of the plastic material caused by the cured protrusion, improving the uniformity of the injection material during injection, and reducing the problem of air pockets inside the plastic product;

[0045] 4. In the plastic mold surface forming treatment system and method based on in-mold injection molding, through multiple discharge ports obliquely arranged inside the discharge port, on the one hand, it can make the plastic fully fill the voids when injecting into the injection mold, avoiding bubbles and defects caused by air being trapped in the mold, thereby obtaining a smoother surface of the plastic product; on the other hand, through the oblique movement of the injection material, it can reduce the cooling time and pressure of the plastic when injecting 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

[0046] The accompanying drawings forming a part of this invention are used to provide a further understanding of the invention. The schematic embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0047] In addition, the terms "installation", "setting", "provided with", "connection", "connected", "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 directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components or parts. 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.

[0048] Figure 1 is the schematic structural diagram of the whole of the present invention;

[0049] Figure 2 is the schematic structural diagram of the whole of the present invention when viewed from below;

[0050] Figure 3 is the schematic sectional view of the whole of the present invention;

[0051] Figure 4 is the present invention Figure 3 the enlarged schematic structural diagram of area A in;

[0052] Figure 5 is the schematic sectional view of the connection between the outer protective tank and the heating component of the present invention;

[0053] Figure 6 is the schematic sectional view of the connection between the extrusion tank and the forward and reverse extrusion vibration mechanism of the present invention;

[0054] Figure 7 is the schematic structural diagram of the reverse extrusion vibration mechanism of the present invention;

[0055] Figure 8 is the present invention Figure 7 the enlarged schematic structural diagram of area B in;

[0056] Figure 9It is a schematic structural diagram of the connection between the push rod and the ratchet assembly of the present invention;

[0057] Figure 10 It is a schematic structural diagram of the connection between the rotating gear and the lifting and vibrating assembly of the present invention;

[0058] Figure 11 It is a schematic structural diagram of the connection between the screw extrusion rod and the injection molding collar of the present invention;

[0059] Figure 12 It is a schematic cross-sectional structural diagram of the connection between the sealing cover and the discharge nozzle of the present invention;

[0060] Figure 13 It is the present invention Figure 12 The enlarged structural diagram of area C in;

[0061] In the figure:

[0062] 10. Extrusion tank; 20. Outer protective tank; 200. Sealing cover; 201. Discharge nozzle; 30. Feeding pipeline; 40. Forward and reverse extrusion and vibration mechanism;

[0063] 50. Rotating extrusion assembly; 500. Screw extrusion rod; 501. Side base; 502. Linear electric cylinder; 503. Telescopic disc; 504. Push rod; 5041. Horizontal groove; 5042. First gear; 5043. Second gear; 5044. Rotating shaft; 5045. Linear motor;

[0064] 60. Ratchet assembly; 601. One-way ratchet; 602. Side turntable; 6021. Outer gear part; 6022. Transmission gear; 6023. Rotating gear; 603. One-way slider; 604. One-way chute part; 605. Return spring;

[0065] 70. Lifting and vibrating assembly; 701. Main rotating rod; 702. Connecting disc; 7020. Slave shaft rod; 7021. Positioning block; 703. Lifting arm; 704. Bottom port; 705. Knocking rod; 7051. Guide block; 7052. Guide rod; 706. Rubber head;

[0066] 80. Heating assembly; 801. Heating module; 802. Heating spiral tube;

[0067] 90. Stopper; 901. Injection molding collar;

[0068] 100. Outer collar; 1001. Discharge port; 1002. Heating ring; 1003. Battery module. Detailed implementation manners

[0069] To enable those skilled in the art to better understand the solution of this application, the following will clearly and completely describe the technical solution in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application. Embodiment 1

[0070] Please refer to Figures 1 - 10 , the in-mold injection-molded plastic mold surface forming treatment system includes an extrusion tank 10, an outer protection tank 20, and a feeding pipeline 30. The extrusion tank 10 is arranged inside the outer protection tank 20. The top of one side of the extrusion tank 10 and the outer protection tank 20 is connected with a feeding pipeline 30. A forward and reverse extrusion vibration mechanism 40 extending to the outside is arranged inside the extrusion tank 10. The forward and reverse extrusion vibration mechanism 40 extends to the outside of the outer protection tank 20. A heating component 80 extending to the outside of the extrusion tank 10 is arranged on the outside of the outer protection tank 20. Among them, the forward and reverse extrusion vibration mechanism 40 includes a rotary extrusion component 50. The rotary extrusion component 50 is installed on the side of the outer protection tank 20. A spiral feeding rod 500 is connected to the bottom of the rotary extrusion component 50. The spiral feeding rod 500 is movably arranged inside the extrusion tank 10; a ratchet component 60. The ratchet component 60 is installed on the side of the outer protection tank 20. The rotary extrusion component 50 penetrates through the inside of the ratchet component 60. A lifting vibration component 70 is connected to the bottom of the ratchet component 60. The lifting vibration component 70 penetrates through the outer protection tank 20. The top of the lifting vibration component 70 abuts directly below the extrusion tank 10.

[0071] In the present invention, a sealing cover 200 is installed on the outside of the bottom of the outer protection tank 20 by screws. A discharge nozzle 201 is assembled on the inner side of the sealing cover 200. Among them, the discharge nozzle 201 is connected to the bottom of the extrusion tank 10.

[0072] The above working principle: When injection molding plastic products, the dried plastic material is poured into the interior of the extrusion tank 10 through the feeding pipe 30, and the heating and melting treatment of the plastic material is completed by the heating component 80. Then, the rotary extrusion component 50 is started to drive the spiral extrusion rod 500 to operate, driving the melted plastic material to rotate and move, moving the plastic material to one side of the discharge nozzle 201, and moving the plastic material into the interior of the injection mold through the discharge nozzle 201 to achieve the injection operation of the plastic material. Among them, when injecting the injection material, the rotary extrusion component 50 drives the spiral extrusion rod 500 to operate in the reverse direction, pushing the injection material to move to one side of the discharge nozzle 201. After completing one injection operation, the rotary extrusion component 50 needs to operate in the forward direction to achieve the material discharging treatment of the injection material. During the material discharging process, the ratchet component 60 drives the lifting and vibrating component 70 to operate, vibrating the plastic raw material during the pushing process, reducing the probability that the heated and softened plastic material adheres to the interior of the extrusion tank 10 due to the temperature drop during the pushing process, and ensuring the efficiency of plastic product processing and production and the quality of the plastic product after processing.

[0073] Specific reference Figure 7 and Figure 8 As shown in, the rotary extrusion component 50 includes a side base 501, the side base 501 is installed on the side of the outer protection tank 20, a linear electric cylinder 502 is installed on the side of the side base 501 through 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, the push rod 504 is rotatably connected to the side of the telescopic disk 503, the push rod 504 extends into the interior of the outer protection tank 20, and a spiral extrusion rod 500 is fixedly connected to the bottom of the push rod 504.

[0074] In this solution, a horizontal groove 5041 is opened 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. Among them, the side of the first gear 5042 is meshed with a 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. Among them, the rotating shaft 5044 is connected to the output end of a 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 push rod 504. Among them, the ratchet component 60 is connected to the outer side of the push rod 504 through the horizontal groove 5041.

[0075] In the above solution, when driving the spiral extrusion rod 500 to rotate to achieve the extrusion operation of plastic materials, 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 its side will rotate, 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.

[0076] In the surface forming treatment system of the plastic mold based on in-mold injection molding of the present invention, when driving the injection molding material to move horizontally to achieve the injection of the injection molding material, the linear cylinder 502 is started to operate, driving the push rod 504 rotatably connected to the output end of the linear cylinder 502 through the telescopic disc 503 to move horizontally, driving the spiral extrusion rod 500 connected to the bottom of the push rod 504 to move.

[0077] Specifically refer to Figure 9 , the ratchet assembly 60 includes a one-way ratchet 601, the one-way ratchet 601 is matched with the horizontal groove 5041, the one-way ratchet 601 is arranged outside the push rod 504 through the horizontal groove 5041, and the one-way ratchet 601 is rotatably connected to the inside 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, the one-way slider 603 is slidably connected to the inside of the one-way chute portion 604, the one-way chute portion 604 is installed inside the side turntable 602, the inclined surface of the one-way slider 603 is matched with the inclined surface of the gear portion of the one-way ratchet 601, and the bottom of the one-way slider 603 is connected with a return spring 605, and the return spring 605 is installed at the inner wall of the side turntable 602.

[0078] In this solution, an outer gear portion 6021 is installed outside the side turntable 602, the bottom of the outer gear portion 6021 is meshed with a transmission gear 6022, the transmission gear 6022 is rotatably connected to an eccentric position on the side of the outer protective tank 20, wherein the bottom of the transmission gear 6022 is meshed with a rotating gear 6023, and a lifting and vibrating assembly 70 is connected to the side of the rotating gear 6023.

[0079] In the above solution, when the side turntable 602 rotates, the outer gear portion 6021 provided outside it will drive the transmission gear 6022 meshed with its outside to rotate, and cause the rotating gear 6023 meshed with the bottom of the transmission gear 6022 to rotate.

[0080] In the in-mold injection molding-based plastic mold surface forming treatment system of the present invention, when the push rod 504 rotates, the one-way ratchet 601 connected to its outer side through the horizontal groove 5041 will rotate. At this time, when the one-way ratchet 601 rotates forward, the horizontal plane of its gear part will contact the horizontal plane of the one-way slider 603, and drive the side turntable 602 connected to the outer side of the one-way slider 603 through the one-way chute part 604 to rotate. When the one-way ratchet 601 rotates backward, the inclined plane of its gear part will contact the inclined plane of the one-way slider 603, and by the way of the one-way ratchet 601 pushing the one-way slider 603 to move, it is ensured that the side turntable 602 will not rotate when the one-way ratchet 601 rotates.

[0081] Specific reference Figure 10 , the lifting and vibrating assembly 70 includes a main rotating rod 701. The main rotating rod 701 is connected to the side of the rotating gear 6023. The main rotating rod 701 is movably arranged below the outer protective tank 20. A connecting disk 702 is installed on the side of the main rotating rod 701. The connecting disk 702 is rotatably connected to the side of the positioning block 7021. The positioning block 7021 is installed at the bottom of the outer protective tank 20. Among them, there are two connecting disks 702. The eccentric parts inside the two connecting disks 702 are rotatably connected to a lifting arm 703 through a connecting rod. The side of another connecting disk 702 is connected to another group of connecting disks 702 through a secondary shaft rod 7020. The lifting arm 703 passes through the bottom opening 704. The bottom opening 704 is opened at the bottom of the outer protective tank 20. A knocking rod 705, the knocking rod 705 is rotatably connected to the inner top of the lifting arm 703. The knocking rod 705 is movably arranged outside the extrusion tank 10. A rubber head 706 is detachably installed on the top of the knocking rod 705. The top of the rubber head 706 abuts against the bottom of the extrusion tank 10.

[0082] In this solution, guide blocks 7051 are connected to the left and right sides of the knocking rod 705. The guide blocks 7051 are slidably connected to the inside of the guide rods 7052. Among them, the guide rods 7052 are installed between the bottom of the extrusion tank 10 and the inner wall of the outer protective tank 20. The guide rods 7052 are installed on the side of the bottom opening 704.

[0083] In the surface forming treatment system of the plastic mold based on in-mold injection molding of the present invention, when the rotating gear 6023 rotates (during the process of discharging materials), 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 rotatably connected to the eccentric part of the connecting disk 702 through a connecting rod to operate. When the lifting arm 703 operates, the knocking rod 705 rotatably connected to the inner top thereof will slide inside the guide rod 7052 through the guide blocks 7051 connected to its left and right sides, ensuring that the rubber head 706 at the top of the knocking rod 705 can move up and down (reciprocate) to perform vibration knocking treatment on multiple positions at the bottom of the extrusion tank 10, reducing the probability of the injection molding material adhering to the inner wall of the extrusion tank 10.

[0084] Specific reference Figure 5 The heating assembly 80 includes a heating module 801 and a heating spiral tube 802. Among them, the heating module 801 is arranged outside the outer protection 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 into the inner part of the outer protection tank 20. Among them, the heating spiral tube 802 is arranged outside the extrusion tank 10.

[0085] In the surface forming treatment system of the plastic mold based on in-mold injection molding of the present invention, before injecting the plastic material, it is necessary to heat and soften the injection molding material 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 to generate heat and continuously heat multiple positions of the extrusion tank 10 arranged inside it, improving the efficiency of heating and softening the injection molding material. At the same time, the helically arranged heating spiral tube 802 can heat multiple positions in multiple directions of the extrusion tank 10, improving the effect of heating and softening the injection molding material. Embodiment 2

[0086] On the basis of the above embodiment, it is found during use that when driving the spiral feeding rod 500 to retreat to realize the discharging operation of the injection molding material, the plastic material is difficult to move, and most of the materials are likely to solidify behind the discharging nozzle 201, resulting in obstacles and empty packages during the extrusion of the next group of plastic materials; when the spiral feeding rod 500 rotates and moves to push the injection molding material into the plastic mold, a large number of gaps will be left in the structure of the spiral feeding rod 500 (inside the injection molding material). At this time, the driving force of the subsequent injection molding material on the front and rear injection molding materials is weak, and the injection molding material is difficult to fill the inside of the plastic mold, resulting in low quality of the plastic products after injection molding.

[0087] Therefore, specific reference Figure 11, a plurality of stoppers 90 are installed on the outer side of the bottom of the spiral feed rod 500, and the stoppers 90 abut against the inner wall of the extrusion tank 10. A plastic injection sleeve ring 901 slidably connected to the outside of the spiral feed rod 500 is arranged on the side surface of the stopper 90. The plastic injection sleeve ring 901 is arranged on the side of the spiral blade outside the spiral feed rod 500, and the plastic injection sleeve ring 901 is slidably connected to the inner wall of the extrusion tank 10.

[0088] In the surface forming treatment system of the plastic mold based on in-mold injection of the present invention, when the spiral feed rod 500 moves forward to push the injection material, the plastic injection sleeve ring 901 will move to one side of the spiral blade outside the spiral feed rod 500. At this time, the contact area between the plastic injection sleeve ring 901 and the spiral feed rod 500 is large, and the gap for the material to move and inject is small, so it is not easy to have the problem that the injection material is difficult to fill the inside of the injection mold. When the spiral feed rod 500 moves backward for the material discharging operation, the plastic injection sleeve ring 901 will move to one side of the stopper 90, opening the space for the injection material to move and retreat, and the injection material is more likely to retreat to one side of the spiral feed rod 500. Embodiment III

[0089] Based on the above embodiment, it is found during use that the injection raw material remaining inside the discharge nozzle 201 (the excess remaining from the previous injection), because it is far from the part that heats the injection material, is prone to solidification when the injected plastic raw material is cooled, cured, and demolded. When the next group of injection materials is extruded, the injected material is prone to the phenomenon of short flow (due to the protrusion of solidification).

[0090] Therefore, specifically referring to Figure 12 and Figure 13 , an outer sleeve 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 sleeve ring 100. The discharge ports 1001 are arranged obliquely. A heating ring 1002 is sleeved on the outer side of the outer sleeve ring 100. A heating unit is arranged inside the heating ring 1002, and the heating unit is connected to the battery module 1003 through a wire. The battery module 1003 is installed on the side surface of the sealing cover 200.

[0091] In the surface forming treatment system of the plastic mold based on in-mold injection molding according to the present invention, when the injection molding material moves into the inside of the discharge port 1001, the heating ring 1002 can be driven by the battery module 1003 to operate, so as to continuously heat the injection molding material inside the heating ring 1002, ensuring that the injection molding material near the injection mold side will not solidify due to temperature. Among them, the multiple obliquely arranged discharge ports 1001 can, on the one hand, enable the plastic to fully fill the voids when injected into the mold, avoiding bubbles and defects caused by air being trapped in the mold, thereby obtaining 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, reducing the probability of the product shrinking and deforming, and ensuring the dimensional accuracy and consistency of the product. Embodiment 4

[0092] Please refer to Figures 1 - 11 , the surface forming treatment method of the plastic mold based on in-mold injection molding, comprising the following steps:

[0093] S1. Preparation and drying of injection molding raw materials: First, select a suitable plastic raw material according to the product requirements of production and processing, 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 inside of the extrusion tank 10 through the feeding pipe 30;

[0094] S2. Melting and injection of injection molding raw materials: The injection molding raw materials poured into the inside of the extrusion tank 10 are first heated and melted by the heating component 80, and the melted plastic raw materials are extruded into the inside of the injection mold by driving the spiral extrusion rod 500 to operate through the rotating extrusion component 50;

[0095] S3. Cooling, curing and demolding: The plastic raw materials located inside the injection mold are cooled by the cooling system inside the injection mold to achieve rapid curing of the injection molding raw materials. After the injection molding materials are cured, demolding treatment is carried out to obtain the finished plastic product.

[0096] Limited to this, any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered within the protection scope of the present invention.

Claims

1. A surface forming treatment system for a plastic mold based on in-mold injection molding, comprising an extrusion tank (10), an outer protective tank (20) and a feeding pipeline (30). The extrusion tank (10) is arranged inside the outer protective tank (20). The top of one side of the extrusion tank (10) and the outer protective tank (20) is communicated with the feeding pipeline (30), and it is characterized in that: Inside the extrusion tank (10), there is 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 protection tank (20). Outside the outer protection tank (20), there is a heating component (80) extending to the outside of the extrusion tank (10). Among them, the forward and reverse extrusion vibration mechanism (40) includes: A rotary extrusion component (50). The rotary extrusion component (50) is installed on the side of the outer protection tank (20). The bottom of the rotary extrusion component (50) is connected with a spiral feed rod (500). The spiral feed rod (500) is movably arranged inside the extrusion tank (10). A ratchet component (60). The ratchet component (60) is installed on the side of the outer protection tank (20). The rotary extrusion component (50) penetrates through the inside of the ratchet component (60). The bottom of the ratchet component (60) is connected with a lifting and vibration component (70). The lifting and vibration component (70) penetrates through the outer protection tank (20). The top of the lifting and vibration component (70) abuts against the lower part of the extrusion tank (10). Among them, the rotary extrusion component (50) includes: A side base (501). The side base (501) is installed on the side of the outer protection tank (20). A linear electric cylinder (502) is installed on the side of the side base (501) through screws. The output end of the linear electric cylinder (502) is connected with a telescopic disc (503). The telescopic disc (503) is movably arranged inside the side base (501). A push rod (504). The push rod (504) is rotatably connected to the side of the telescopic disc (503). The push rod (504) extends into the outer protection tank (20). The bottom of the push rod (504) is fixedly connected with a spiral feed rod (500). A horizontal groove (5041) is arranged on the outer side of the push rod (504). The ratchet component (60) includes: A one-way ratchet (601). The one-way ratchet (601) is matched with 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 inside of the side turntable (602). Among them, the side turntable (602) is rotatably connected to the side of the outer protection tank (20). A one-way slider (603). The one-way slider (603) is slidably connected to the inside of the one-way chute part (604). The one-way chute part (604) is installed on the inside of the side turntable (602). The inclined surface of the one-way slider (603) is matched with the inclined surface of the gear part of the one-way ratchet (601). The bottom of the one-way slider (603) is connected with a return spring (605). The return spring (605) is installed on the inner wall of the side turntable (602). A plurality of stoppers (90) are installed on the outer side of the bottom of the spiral feeding rod (500). The stoppers (90) abut against the inner wall of the extrusion tank (10). A plastic injection collar (901) which is slidably connected to the outside of the spiral feeding rod (500) is arranged on the side surface of the stopper (90). The plastic injection collar (901) is arranged on the side surface of the spiral blade outside the spiral feeding rod (500). The plastic injection collar (901) is slidably connected to the inner wall of the extrusion tank (10).

2. The surface forming treatment system for plastic molds based on in-mold injection molding according to claim 1, wherein: A sealing cover (200) is installed on the outer side of the bottom of the outer protection tank (20) by screws. A discharge nozzle (201) is assembled on the inner side of the sealing cover (200). Among them, the discharge nozzle (201) is connected to the bottom of the extrusion tank (10).

3. The surface forming treatment system for plastic molds based on in-mold injection molding according to claim 1, characterized in that: A first gear (5042) is movably connected to the outside of the push rod (504) through a horizontal groove (5041). The first gear (5042) is rotatably connected to the inside of the side base (501). Among them, the side surface of the first gear (5042) is meshed with a second gear (5043). The second gear (5043) is rotatably connected to the inside of the side base (501). A rotating shaft (5044) is connected to the bottom of the second gear (5043). Among them, the rotating shaft (5044) is connected to the output end of a linear motor (5045). The linear motor (5045) is installed inside the side base (501). The linear motor (5045) is arranged on the side surface of the push rod (504). Among them, a ratchet assembly (60) is connected to the outside of the push rod (504) through a horizontal groove (5041).

4. The surface forming treatment system for plastic molds based on in-mold injection molding according to claim 3, characterized in that: An outer gear part (6021) is installed on the outside of the side turntable (602). A transmission gear (6022) is meshed with the bottom of the outer gear part (6021). The transmission gear (6022) is rotatably connected to an eccentric position on the side surface of the outer protection tank (20). Among them, a rotating gear (6023) is meshed with the bottom of the transmission gear (6022). A lifting and vibrating assembly (70) is connected to the side surface of the rotating gear (6023).

5. The surface forming treatment system for plastic molds based on in-mold injection molding according to claim 4, wherein: The lifting and vibrating assembly (70) includes: A main rotating rod (701). The main rotating rod (701) is connected to the side surface of the rotating gear (6023). The main rotating rod (701) is movably arranged below the outer protection tank (20). A connecting disk (702) is installed on the side surface of the main rotating rod (701). The connecting disk (702) is rotatably connected to the side surface of a positioning block (7021). The positioning block (7021) is installed on the bottom of the outer protection tank (20). Among them, there are two connecting disks (702). The eccentric positions inside the two connecting disks (702) are rotatably connected to a lifting arm (703) through a connecting rod. The side surface of the other connecting disk (702) is connected to another group of connecting disks (702) through a secondary shaft rod (7020). The lifting arm (703) penetrates through a bottom opening (704). The bottom opening (704) is opened on the bottom of the outer protection tank (20). A striking rod (705) is rotatably connected to the inner top of the lifting arm (703). The striking rod (705) is movably arranged outside the extrusion tank (10). A rubber head (706) is detachably installed at the top of the striking rod (705), and the top of the rubber head (706) abuts against the lower part of the extrusion tank (10).

6. The surface forming treatment system for plastic molds based on in-mold injection molding according to claim 5, wherein: Guide blocks (7051) are connected to the left and right sides of the striking rod (705), and the guide blocks (7051) are slidably connected to the inside of guide rods (7052). Among them, the guide rods (7052) are installed between the bottom of the extrusion tank (10) and the inner wall of the outer protective tank (20), and the guide rods (7052) are installed on the side of the bottom port (704).

7. The surface forming treatment system for plastic molds based on in-mold injection molding according to claim 1, characterized in that: The heating assembly (80) includes a heating module (801) and a heating spiral tube (802). Among them, 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 into the outer protective tank (20). Among them, the heating spiral tube (802) is arranged outside the extrusion tank (10).

8. A method for surface forming treatment of a plastic mold based on in-mold injection molding, for the surface forming treatment system of a plastic mold based on in-mold injection molding according to any one of claims 1-7, characterized in that, It 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 production and processing, 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 inside of the extrusion tank (10) through the feeding pipeline (30); S2. Melting and injection of injection molding raw materials: The injection molding raw materials poured into the inside of the extrusion tank (10) are first heated and melted by the heating assembly (80), and the melted plastic raw materials are extruded into the inside of the injection mold by driving the spiral feeding rod (500) to operate through the rotary extrusion assembly (50); S3. Cooling, curing and demolding: The plastic raw materials located inside the injection mold are cooled by the cooling system inside the injection mold to achieve rapid curing of the injection molding raw materials. After the injection molding materials are cured, demolding is carried out to obtain finished plastic products.

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