Multi-material precise proportioning injection molding machine feeding device

Abstract

The utility model discloses a multi -material accurate proportioning injection molding machine feeding device belongs to injection molding production technical field, aiming at the feeding and proportioning link of multi -material injection molding production process generally exist precision is insufficient, the problem such as low efficiency, including the feeding bin of from top to bottom connection in proper order, first intermediate storehouse, second intermediate storehouse, drive storehouse and mixing bin. The feeding bin is equipped with a plurality of annular distribution's material cylinder, and each material cylinder bottom is equipped with intelligent valve mouth control unloading. Second intermediate storehouse is equipped with multiple groups of transmission storehouse, and each group transmission storehouse is equipped with the weighing plate that is driven to be inclined through hydraulic device, realizes the accurate weighing and proportioning of material. Drive storehouse is equipped with multiple groups of stirring shafts that are driven through synchronous belt, and mixing bin is equipped with the stirring device with scrape wall function, ensures that material mixes evenly without residue. Mixing bin bottom is equipped with multiple groups of discharge valve mouth. The device realizes the automatic accurate proportioning of multi -material, efficient mixing and clean discharge, and remarkably improves production efficiency and product quality.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding production technology, specifically relating to a feeding device for injection molding machines with precise proportioning of multiple materials. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. They are classified as vertical, horizontal, and all-electric. Injection molding machines heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity.

[0003] Currently, the feeding and proportioning processes in multi-material injection molding production generally suffer from insufficient precision and low efficiency. Traditional equipment mostly uses manual feeding or simple mechanical mixing after separate metering, which makes it difficult to achieve high-precision dynamic proportioning of multiple materials and is prone to weighing errors and cross-contamination. In addition, existing mixing devices often have dead zones, resulting in uneven mixing of materials and affecting the quality of the final product. During the unloading process, material residues at the bottom and sides of the hopper not only cause waste but also affect the stability of the proportioning between different batches.

[0004] Therefore, it is necessary to develop an injection molding machine feeding device that can achieve automatic and precise proportioning, efficient and uniform mixing, and residue-free mixing, in order to meet the stringent requirements of high-end injection molded products for material proportioning consistency and mixing quality. Utility Model Content

[0005] The purpose of this invention is to provide a feeding device for injection molding machines with precise proportioning of multiple materials, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-material precise proportioning injection molding machine feeding device, including a cylinder, wherein the cylinder is provided with a feeding bin, a first intermediate bin, a second intermediate bin, a drive bin and a mixing bin from top to bottom, and the bins are fixedly connected to each other;

[0007] The feeding hopper has at least four sets of annularly distributed mounting slots at its upper end. Each mounting slot is fixedly connected to a material cylinder. The upper end of the material cylinder is cylindrical and the lower end is conical. The lower end of the material cylinder passes through the first intermediate hopper.

[0008] The lower end of each material cylinder located inside the first intermediate chamber is equipped with a first intelligent valve port.

[0009] The second intermediate chamber contains at least four sets of circularly distributed transfer chambers. Each transfer chamber includes a chamber body, with a feed inlet at the upper center of each chamber body connected to the lower end of the corresponding material cylinder. Guide plates are located at the upper right and lower left corners of each chamber body, one side of which is arc-shaped. A hydraulic device is fixedly connected to the lower right side of the chamber body, with the other end of the hydraulic rod of each device fixedly connected to the lower right side of the base plate via a universal joint. A rotating shaft is rotatably connected to the center of the base plate, with both ends fixedly connected to the front and rear sides of the chamber body. A weighing plate is fixedly connected to the upper top of the base plate, and a second limiting baffle is fixedly connected to the upper right side of the weighing plate. A first limiting baffle is located on one side of the guide plate at the upper right corner, and a discharge chute is located in the center of the guide plate at the lower left corner. The lower left side of the base plate is connected to the lower left side of the chamber body via auxiliary components.

[0010] The drive chamber contains a drive mixing structure, which includes a drive motor. The output shaft of the drive motor is meshed with three sets of triangularly distributed rotating shafts via a synchronous belt. The lower ends of the rotating shafts all penetrate and are slidably connected to the mixing chamber, and several stirring shafts are fixedly connected to their outer surfaces. A connecting pipe is provided in the middle of the drive chamber, which is connected to a through hole in the middle of the upper end of the drive chamber, thus enabling communication between the second intermediate chamber and the mixing chamber.

[0011] The mixing chamber has three sets of discharge components at its lower end, each set of discharge components including a discharge port and a second intelligent valve port.

[0012] It should be noted in the solution that each of the auxiliary components includes a first fixing plate, the lower end of which is fixedly connected to the lower end of the compartment body, and the upper middle part of each of the first fixing plates is provided with a sliding groove. A sliding block is slidably connected to the sliding groove. The lower end of the sliding block and the inner surface of the lower end of the sliding groove are connected to each other by several auxiliary springs. A second fixing plate is fixedly connected to the upper end of each sliding block. The upper end of each of the second fixing plates is connected to the lower left side of the bottom plate by a universal joint.

[0013] It is worth noting that the outer surface of the synchronous belt located inside the drive compartment has a limiting dust cover.

[0014] Furthermore, it should be noted that a scraper plate is fixedly connected to the lower side of each of the bottom stirring shafts, and a scraper plate is provided on the outer side of each set of stirring shafts.

[0015] Furthermore, it should be noted that the four sets of ring-shaped transfer chambers combine to form a closed channel, the channel and the connecting pipe have the same cross-section and are interconnected.

[0016] Compared with the prior art, the multi-material precise proportioning injection molding machine feeding device provided by this utility model has at least the following beneficial effects:

[0017] (1) This device achieves precise proportioning and quantitative conveying of multiple materials through a multi-layered silo structure and an independently controlled intelligent valve system. Multiple circularly distributed cylinders in the feed silo can simultaneously accommodate different types of raw materials. The first intelligent valve at the bottom of each cylinder can independently control the opening, closing, and flow rate of a single material. After the material enters the transfer silo, the weighing plate is tilted at an adjustable angle via a hydraulic device. This, combined with guide plates and limit baffles, forms a controllable slide, allowing the material to be dynamically weighed on the weighing plate before being discharged through the discharge chute. This design ensures that the proportioning accuracy of each material is not affected by other materials. The weighing and conveying processes work in tandem, significantly improving the accuracy and stability of the proportioning and providing a reliable basis for the subsequent mixing process.

[0018] (2) This device employs a driven mixing structure to achieve efficient and uniform mixing and clean discharge. The drive motor simultaneously rotates three rotating shafts via a synchronous belt, causing multiple sets of stirring shafts within the mixing chamber to form a compound vortex motion, completely breaking up material agglomeration. Scraper plates on the outer edge of the stirring shafts remove material adhering to the chamber walls, while bottom scrapers prevent residue, ensuring complete mixing without dead zones. The mixed material is simultaneously discharged through three sets of discharge components, improving discharge efficiency. The entire mixing process is completed within a sealed space, avoiding external contamination, while a limiting dust cover protects the transmission mechanism and extends the equipment's service life. This design significantly improves mixing uniformity and production efficiency, making it suitable for precision injection molding production with high mixing quality requirements. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure of the cylindrical body of this utility model;

[0020] Figure 2 This is a schematic diagram of the driving hybrid structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the mixing chamber structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the silo structure of this utility model.

[0023] In the diagram: 1. Cylinder; 101. Feed bin; 1011. Mounting slot; 102. First intermediate bin; 103. Second intermediate bin; 104. Drive bin; 1041. Through hole; 105. Mixing bin; 2. Material cylinder; 3. First intelligent valve port; 4. Transfer bin; 401. Bin body; 402. Discharge chute; 403. Feed inlet; 404. Guide plate; 4041. First limit baffle; 405. Hydraulic device; 406. Hydraulic rod; 407. Base plate; 4071. Rotation. 408. Shaft; 409. Weighing plate; 400. Second limit baffle; 5. Connecting pipe; 6. Drive mixing structure; 601. Drive motor; 602. Synchronous belt; 603. Rotating shaft; 604. Stirring shaft; 605. Scraper; 7. Limit dust cover; 8. Discharge assembly; 801. Discharge port; 802. Second intelligent valve port; 9. Auxiliary assembly; 901. First fixing plate; 902. Sliding groove; 903. Auxiliary spring; 904. Sliding block; 905. Second fixing plate. Detailed Implementation

[0024] The present invention will be further described below with reference to the embodiments.

[0025] Please see Figure 1-4 This utility model provides a multi-material precise proportioning injection molding machine feeding device, including: a cylinder 1, the cylinder 1 being provided with a feeding bin 101, a first intermediate bin 102, a second intermediate bin 103, a drive bin 104 and a mixing bin 105 from top to bottom, and the bins are fixedly connected to each other;

[0026] The feeding hopper 101 has at least four sets of annularly distributed mounting slots 1011 at its upper end. Each mounting slot 1011 is fixedly connected to a material cylinder 2. The upper end of the material cylinder 2 is cylindrical and the lower end is conical. The lower end of the material cylinder 2 passes through the first intermediate hopper 102.

[0027] The first intermediate chamber 102 and the lower end of the material cylinder 2 located inside the first intermediate chamber 102 are both equipped with a first intelligent valve port 3;

[0028] The second intermediate chamber 103 contains at least four sets of annularly distributed transfer chambers 4. Each transfer chamber 4 includes a chamber body 401, with a feed inlet 403 located at the upper center of each chamber body 401 and connected to the lower end of the corresponding material cylinder 2. Guide plates 404 are located at the upper right and lower left corners of each chamber body 401, with one side of the guide plate 404 being arc-shaped. A hydraulic device 405 is fixedly connected to the lower right side of the chamber body 401, and the other end of the hydraulic rod 406 of the hydraulic device 405 is fixedly connected to the base plate 407 via a universal joint. At the lower right end, a rotating shaft 4071 is rotatably connected to the middle of the bottom plate 407. The two ends of the rotating shaft 4071 are fixedly connected to the front and rear sides of the silo body 401. A weighing plate 408 is fixedly connected to the upper end of the bottom plate 407. A second limiting baffle 409 is fixedly connected to the upper right side of the weighing plate 408. A first limiting baffle 4041 is provided on one side of the upper right corner guide plate 404. A discharge chute 402 is provided in the middle of the lower left corner guide plate 404. The lower left side of the bottom plate 407 and the lower left side of the silo body 401 are connected to each other through auxiliary components 9.

[0029] The drive chamber 104 is equipped with a drive mixing structure 6. The drive mixing structure 6 includes a drive motor 601. The output shaft of the drive motor 601 is meshed with three sets of triangularly distributed rotating shafts 603 through a synchronous belt 602. The lower ends of the rotating shafts 603 are all slidably connected to the mixing chamber 105, and several stirring shafts 604 are fixedly connected to their outer surfaces. A connecting pipe 5 is provided in the middle of the drive chamber 104. The connecting pipe 5 is connected to the through hole 1041 provided in the middle of the upper end of the drive chamber 104, so that the second intermediate chamber 103 and the mixing chamber 105 are interconnected.

[0030] The mixing chamber 105 has three sets of discharge components 8 at its lower end. Each set of discharge components 8 includes a discharge port 801 and a second intelligent valve port 802.

[0031] Further as Figure 4 As shown, each auxiliary component 9 includes a first fixing plate 901. The lower end of each first fixing plate 901 is fixedly connected to the lower end of the chamber 401, and the upper middle part of each first fixing plate 901 is provided with a sliding groove 902. A sliding block 904 is slidably connected to the sliding groove 902. The lower end of the sliding block 904 and the inner surface of the lower end of the sliding groove 902 are interconnected by several auxiliary springs 903. A second fixing plate 905 is fixedly connected to the upper end of each sliding block 904. The upper end of each second fixing plate 905 is connected to the lower left side of the base plate 407 through a universal joint. Through the cooperation of the first fixing plate 901 and the sliding groove 902, the auxiliary component 9 allows the sliding block 904 to slide stably under the buffering effect of the auxiliary springs 903. This structure allows the second fixing plate 905 to provide flexible support to the base plate 407 through the universal joint, effectively mitigating the impact force generated when the hydraulic device 405 operates, ensuring the stability of the weighing plate 408 during tilting, thereby improving weighing accuracy and equipment service life.

[0032] Further as Figure 2 and Figure 3 As shown, it is worth noting that the outer surface of the synchronous belt 602 located inside the drive compartment 104 is equipped with a limiting dust cover 7. This limiting dust cover 7 effectively prevents dust and impurities from entering the transmission system, keeping the meshing surface between the synchronous belt 602 and the rotating shaft 603 clean. This not only ensures the accuracy and stability of power transmission from the drive motor 601, but also extends the service life of the synchronous belt 602 and reduces equipment maintenance costs.

[0033] Further as Figure 2 and Figure 3 As shown, it is worth noting that a scraper plate 605 is fixedly connected to the lower side of each of the bottom stirring shafts 604, and a wall scraper plate is provided on the outer side of each set of stirring shafts 604. The scraper plate 605 on the lower side of the bottom stirring shaft 604 can effectively scrape off the material accumulated at the bottom of the mixing chamber 105, while the wall scraper plate on the outer side of each set of stirring shafts 604 can remove the adhering substances on the chamber wall. This design ensures that there are no dead corners for material residue, improves the uniformity of mixing, facilitates the cleaning of the chamber, and reduces cross-contamination between different batches of material.

[0034] Further as Figure 2 and Figure 3 As shown, it is worth noting that the four sets of annularly distributed transfer chambers 4 combine to form a closed channel. The channel has the same cross-section as the connecting pipe 5 and is interconnected. This design allows the materials proportioned in each transfer chamber 4 to enter the connecting pipe 5 completely and smoothly, avoiding material residue in corners during the transfer process, ensuring proportioning accuracy, and realizing pre-mixing of each material before entering the mixing chamber 105, thus improving mixing efficiency.

[0035] This solution has the following working process: Multiple materials are stored in circularly distributed material cylinders 2 on the feeding hopper 101. The first intelligent valve 3 at the bottom of each material cylinder 2 independently controls the material's delivery to the corresponding transfer chamber 4 within the second intermediate hopper 103. The material falls onto the weighing plate 408 through the feeding port 403 for weighing. The hydraulic device 405, via the hydraulic rod 406, pushes the bottom plate 407 to rotate around the rotating shaft 4071, changing the tilt angle of the weighing plate 408. The auxiliary spring 903 in the auxiliary component 9 provides buffer support. After proportioning, the material is collected along the guide plate 404 through the discharge chute 402 and enters the mixing chamber 105 through the connecting pipe 5. The drive motor 601 drives three rotating shafts 603 via the synchronous belt 602. The stirring shaft 604 on the shafts mixes the material, while the scraper plate 605 and scraper plate prevent material adhesion. After mixing, the second intelligent valve 802 opens, and the material is discharged from the discharge port 801.

[0036] As can be seen from the above working process, the auxiliary component 9, through the cooperation of the first fixed plate 901 and the sliding groove 902, enables the sliding block 904 to slide stably under the buffering effect of the auxiliary spring 903. This structure allows the second fixed plate 905 to provide flexible support for the base plate 407 through the universal joint, effectively mitigating the impact force generated when the hydraulic device 405 operates, ensuring the stability of the weighing plate 408 during tilting, thereby improving weighing accuracy and equipment service life. The limiting dust cover 7 set on the outer surface of the synchronous belt 602 can effectively prevent dust and impurities from entering the transmission system, keeping the meshing surface of the synchronous belt 602 and the rotating shaft 603 clean. This not only ensures the accuracy and stability of the power transmission of the drive motor 601, but also extends the service life of the synchronous belt 602 and reduces equipment maintenance costs. The scraper plate 605 set on the lower side of the bottom stirring shaft 604 can effectively scrape off the material accumulated at the bottom of the mixing chamber 105, while the scraper plate set on the outer side of each set of stirring shafts 604 can remove the adhering substances on the chamber wall. This design ensures no material residue in dead corners, improves mixing uniformity, facilitates cleaning of the storage chamber, and reduces cross-contamination between different batches of material. The sealed channel formed by the center surfaces of the four ring-shaped transfer chambers 4 has the same cross-section as the connecting pipe 5 and is interconnected. This design allows the proportioned material in each transfer chamber 4 to completely and smoothly enter the connecting pipe 5, avoiding material residue in corners during transfer, ensuring proportioning accuracy, and simultaneously achieving pre-mixing of each material before entering the mixing chamber 105, thus improving mixing efficiency.

[0037] In summary, this device achieves precise proportioning and quantitative conveying of multiple materials through a multi-layered silo structure and an independently controlled intelligent valve system. Multiple circularly distributed material cylinders in the feed silo can simultaneously hold different types of raw materials. The first intelligent valve at the bottom of each cylinder can independently control the opening, closing, and flow rate of a single material. After the material enters the transfer silo, a hydraulic device drives the weighing plate to adjust its tilt angle. This, combined with guide plates and limit baffles, forms a controllable slide, allowing the material to be dynamically weighed on the weighing plate before being discharged through the discharge chute. This design ensures that the proportioning accuracy of each material is not affected by other materials. The weighing and conveying processes work in tandem, significantly improving the accuracy and stability of the proportioning and providing a reliable raw material ratio basis for subsequent mixing processes. The device employs a driven mixing structure to achieve efficient and uniform mixing and clean discharge. The drive motor simultaneously drives three rotating shafts via a synchronous belt, causing multiple sets of stirring shafts within the mixing silo to form a compound vortex motion, completely breaking up material agglomeration. The scraper blades on the outer edge of the mixing shaft remove material adhering to the bin walls, while the bottom scraper prevents residue, ensuring complete mixing without dead zones. The mixed material is simultaneously discharged through three sets of discharge components, improving discharge efficiency. The entire mixing process is completed within a sealed space, preventing external contamination, while the limiting dust cover protects the transmission mechanism and extends the equipment's lifespan. This design significantly improves mixing uniformity and production efficiency, making it suitable for precision injection molding production with high mixing quality requirements.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-material precision proportioning injection molding machine feeding device, comprising a cylinder (1), characterized in that: The cylinder (1) is provided with a feeding bin (101), a first intermediate bin (102), a second intermediate bin (103), a drive bin (104), and a mixing bin (105) from top to bottom, and they are fixedly connected to each other; Feeding bin (101), the upper end of the feeding bin (101) is provided with at least four sets of annularly distributed mounting slots (1011), each mounting slot (1011) is fixedly connected with a material cylinder (2), the upper end of the material cylinder (2) is cylindrical and the lower end is conical, and the lower end of the material cylinder (2) penetrates through the first intermediate bin (102); The first intermediate chamber (102) is equipped with a first intelligent valve port (3) at the lower end of the material cylinder (2) located inside the first intermediate chamber (102); The second intermediate chamber (103) is provided with at least four sets of circularly distributed transfer chambers (4). Each transfer chamber (4) includes a chamber body (401), and each chamber body (401) has a feed inlet (403) in the middle of its upper end, which is connected to the lower end of the corresponding material cylinder (2). Each chamber body (401) has a guide plate (404) at its upper right corner and lower left corner. One side of the guide plate (404) is arc-shaped. A hydraulic device (405) is fixedly connected to the lower right side of the chamber body (401). The other end of the hydraulic rod (406) of the hydraulic device (405) is fixedly connected to the base plate (407) through a universal joint. At the lower right end, a rotating shaft (4071) is rotatably connected to the middle of the bottom plate (407). The two ends of the rotating shaft (4071) are fixedly connected to the front and rear sides of the silo body (401). A weighing plate (408) is fixedly connected to the upper end of the bottom plate (407). A second limiting baffle (409) is fixedly connected to the upper right side of the weighing plate (408). A first limiting baffle (4041) is provided on one side of the guide plate (404) at the upper right corner. A discharge chute (402) is provided in the middle of the guide plate (404) at the lower left corner. The lower left side of the bottom plate (407) is connected to the lower left side of the silo body (401) through an auxiliary component (9). The drive chamber (104) is provided with a drive mixing structure (6). The drive mixing structure (6) includes a drive motor (601). The output shaft of the drive motor (601) is meshed with three sets of triangularly distributed rotating shafts (603) through a synchronous belt (602). The lower ends of the rotating shafts (603) all pass through and are slidably connected to the mixing chamber (105). Several stirring shafts (604) are fixedly connected to their outer surfaces. A connecting pipe (5) is provided in the middle of the drive chamber (104). The connecting pipe (5) is connected to the through hole (1041) provided in the middle of the upper end of the drive chamber (104) and makes the second intermediate chamber (103) and the mixing chamber (105) interconnected. The mixing chamber (105) has three sets of discharge components (8) at its lower end. Each set of discharge components (8) includes a discharge port (801) and a second intelligent valve port (802).

2. The multi-material precise proportioning injection molding machine feeding device according to claim 1, characterized in that: Each of the auxiliary components (9) includes a first fixing plate (901). The lower end of the first fixing plate (901) is fixedly connected to the lower end of the compartment (401). The upper middle part of the first fixing plate (901) is provided with a sliding groove (902). The sliding groove (902) is slidably connected to a sliding block (904). The lower end of the sliding block (904) is connected to the inner surface of the lower end of the sliding groove (902) by a number of auxiliary springs (903). The upper end of the sliding block (904) is fixedly connected to a second fixing plate (905). The upper end of the second fixing plate (905) is connected to the lower left side of the bottom plate (407) by a universal joint.

3. The multi-material precise proportioning injection molding machine feeding device according to claim 1, characterized in that: The outer surface of the synchronous belt (602) located in the drive compartment (104) has a limited dust cover (7).

4. The multi-material precise proportioning injection molding machine feeding device according to claim 1, characterized in that: Each of the bottom stirring shafts (604) is fixedly connected to a scraper plate (605), and each set of stirring shafts (604) is provided with a wall scraper plate on the outside.

5. The multi-material precise proportioning injection molding machine feeding device according to claim 1, characterized in that: The four ring-shaped transfer chambers (4) combine with each other to form a closed channel. The channel has the same cross-section as the connecting pipe (5) and they are interconnected.

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