Centralized injection molding master batch feeding system and feeding method

Abstract

The invention belongs to the technical field of injection molding master batch feeding, and particularly relates to an injection molding master batch centralized feeding system which comprises a plurality of storage tanks, feeding ports are formed in the upper ends of the storage tanks, a first conveying pipe is arranged at the lower ends of the storage tanks in a penetrating mode, and a meter is arranged on the first conveying pipe; the number of the temporary storage tanks is consistent with that of the storage tanks, the upper ends of the temporary storage tanks are in through connection with the first conveying pipe, and a second conveying pipe is arranged at the lower ends of the temporary storage tanks; the adjusting hoppers are correspondingly arranged on the second conveying pipes, each adjusting hopper comprises a shell, and scraping parts are formed in the positions, connected with the second conveying pipes, of the upper portions of the shells; and a mixing tank. According to the injection molding master batch centralized feeding system in the technical scheme, in the material conveying process, various materials with different total amounts are controlled to be evenly and synchronously fed into the mixing tank within the same time, the mass ratio of the different materials fed into the mixing tank is controlled, the distribution uniformity of the different materials is improved, and the quality of the materials is improved. Therefore, the time required for mixing the materials is shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding master batch feeding, and in particular relates to an injection molding master batch centralized feeding system and a feeding method of the injection molding master batch centralized feeding system. Background Art

[0002] Injection molding is a method in which completely molten plastic material is stirred by a screw at a certain temperature, injected into a mold cavity with high pressure, and a molded product is obtained after cooling and solidification. It has the advantages of fast production speed, high efficiency, and automated operation.

[0003] In the process of injection molding, the injection molding machine needs to be fed to ensure the continuity of injection molding. In the existing feeding system, different materials with a total amount are put into the mixing tank together, and then the mixing mechanism is used to mix and shear them to feed the injection molding machine evenly, which wastes a lot of mixing time.

[0004] In view of the above problems, a centralized feeding system for injection molding masterbatch and a feeding method for the centralized feeding system for injection molding masterbatch are designed. Summary of the invention

[0005] The present invention aims at solving the problems in the prior art and proposes the following technical solutions:

[0006] Injection masterbatch centralized feeding system,

[0007] A plurality of storage tanks, each having a feed port at its upper end, a feed pipe 1 penetrating through its lower end, and a metering device on the feed pipe 1;

[0008] The number of temporary storage tanks is the same as that of the storage tanks, the upper ends of the temporary storage tanks are connected to the first material delivery pipe, and the lower ends of the temporary storage tanks are provided with a second material delivery pipe;

[0009] A regulating hopper is correspondingly arranged on each second feeding pipe, the regulating hopper comprises a shell, a scraping portion is formed at the position where the upper part of the shell is connected to the second feeding pipe, a roller is rotatably arranged inside the shell, a plurality of grooves are axially opened on the roller, both ends of each groove are slidably matched with blocks, and the gap between the two blocks and the groove forms a material cavity;

[0010] A mixing tank, wherein a plurality of the feed pipes 2 are connected to the same mixing tank;

[0011] By changing the distance between the two blocks and adjusting the volume of the material cavity in the different adjustment hoppers, a predetermined total amount of material is input from the storage tank to the interior of the temporary storage tank through the metering device, and the material falls into the material cavity that rotates to the top, and the excess material is scraped off by the scraping part, and the material cavity rotates to the bottom and is input into the interior of the mixing tank.

[0012] As a preferred embodiment of the above technical solution, the regulating hopper also includes a motor 1 assembled on the shell, the output end of the motor 1 is connected to a long shaft, and the long shaft is connected to the drum.

[0013] As a preferred embodiment of the above technical solution, the long shaft sleeve is provided with two side plates, the two side plates are respectively distributed on both sides of the drum, and the plurality of blocks are connected to the side plates located on the same side;

[0014] An electric push rod is arranged between the side plate and the roller.

[0015] As a preferred embodiment of the above technical solution, the upper portion of the shell is configured as an arc segment matching the drum, and the lower portion of the shell is configured as a straight segment.

[0016] As a preferred embodiment of the above technical solution, the number of the grooves on different rollers is different, and the sizes of the grooves on different rollers are different.

[0017] As a preferred embodiment of the above technical solution, the lower end of the mixing tank is provided with a discharge pipe, the discharge pipe is provided with a valve, and the interior of the mixing tank is provided with a stirring mechanism.

[0018] As a preferred embodiment of the above technical solution, an upper cover and a lower cover are provided at the upper end of the mixing tank, a gap is provided between the upper cover and the lower cover, an outer plate covering the gap is provided on the outside of the mixing tank, the upper end of the outer plate is fixedly connected to the upper cover, the lower end of the outer plate is rotatably matched with the lower cover, and the second feed pipe is located on the outer plate.

[0019] As a preferred embodiment of the above technical solution, the mixing tank is provided with a base plate, and the base plate and the mixing tank are rotatably matched through bearings. Motor 2 is provided on the base plate, and the output end of motor 2 is connected to gear 1, and gear 1 is meshed with gear 2, and gear 2 is fixedly sleeved on the outside of the mixing tank.

[0020] The feeding method of the centralized feeding system for injection molding masterbatch according to any one of the above items comprises the following steps:

[0021] S1. Adjust the volume of the material chamber: calculate the total amount of different materials, and adjust the volume ratio of the material chamber according to the total amount ratio of different materials under the premise of the same drum rotation speed;

[0022] S2. Primary transportation: According to the total amount of materials corresponding to different storage tanks, the total amount of materials is transported to the interior of the temporary storage tank through the meter;

[0023] S3. Secondary conveying: The drum rotates, and the material falls into the material cavity that rotates to the top. The scraper scrapes off the excess material, and the material cavity rotates to the bottom and is input into the mixing tank.

[0024] As a preferred embodiment of the above technical solution, in step S1, the volume of the material chamber is adjusted as follows:

[0025] Control the two blocks inside the same tank to move closer to each other, and the volume of the hopper will be reduced;

[0026] The two blocks inside the same tank are controlled to move away from each other, and the volume of the hopper is increased.

[0027] The beneficial effects of the present invention are:

[0028] The centralized injection molding masterbatch feeding system in the present technical solution controls the materials of different total amounts to be uniformly and synchronously fed into the mixing tank at the same time during the material conveying process, controls the mass ratio between the different materials fed into the mixing tank, improves the uniformity of distribution between the different materials, and thus reduces the time required for material mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The structure diagram of the centralized feeding system of injection molding masterbatch in Example 1 is shown;

[0030] Figure 2 It shows Figure 1 Schematic diagram of the internal structure of the intermediate mixing tank;

[0031] Figure 3 It shows Figure 1 Schematic diagram of the internal structure of the intermediate temporary storage tank and the regulating hopper;

[0032] Figure 4 It shows Figure 3 A schematic side view of the intermediate storage tank and the regulating hopper;

[0033] Figure 5 What is shown is a schematic diagram of the partial structure inside the regulating hopper in Example 1.

[0034] Reference numerals: storage tank 10; feed pipe 11; metering device 12;

[0035] Temporary storage tank 20; feeding pipe 21;

[0036] Adjusting hopper 30; housing 31; scraping portion 311; arc section 312; straight section 313;

[0037] Motor 1 32; long shaft 33; roller 34; tank 35; block 36; side plate 37; electric push rod 38;

[0038] Mixing tank 40; stirring mechanism; upper cover 41; lower cover 42; outer plate 43; base plate 44; bearing 45; motor 2 46; gear 1 47; gear 2 48. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0040] Example 1

[0041] like Figure 1 , Figure 3 , Figure 4 , Figure 5 As shown, the injection molding masterbatch centralized feeding system includes a plurality of storage tanks 10. In this embodiment, the number of storage tanks 10 can be matched with the number of material types. A feed port is provided at the upper end of the storage tank 10, and a feed pipe 11 is provided through the lower end of the storage tank 10. A meter 12 is provided on the feed pipe 11.

[0042] The number of temporary storage tanks 20 is the same as that of the storage tanks 10, the upper end of the temporary storage tank 20 is connected to the material delivery pipe 11, and the lower end of the temporary storage tank 20 is provided with a material delivery pipe 21;

[0043] The regulating hopper 30 is correspondingly arranged on each feeding pipe 21, and the regulating hopper 30 includes a shell 31, a scraping portion 311 is formed at the position where the upper part of the shell 31 is connected to the feeding pipe 21, and a roller 34 is rotatably arranged inside the shell 31, and the rotation direction of the roller 34 is Figure 4 As shown by the arrow in the figure, a plurality of grooves 35 are axially opened on the roller 34, and blocks 36 are slidably matched at both ends of each groove 35, and a material cavity is formed between the two blocks 36 and the groove 35; the roller 34 drives the material cavity to rotate, and when the material cavity rotates to the top of the roller 34, the material is injected into the material cavity, and when the material cavity rotates to the bottom of the roller 34, the material is discharged from the material cavity;

[0044] A mixing tank 40, a plurality of feed pipes 21 are connected to the same mixing tank 40;

[0045] By changing the distance between the two blocks 36 and adjusting the volume of the material chamber in the different adjustment hoppers 30, a predetermined total amount of material is input from the storage tank 10 into the interior of the temporary storage tank 20 via the metering device 12, and the material falls into the material chamber that rotates to the top, and the excess material is scraped off by the scraping part 311, and the material chamber rotates to the bottom and is input into the interior of the mixing tank 40.

[0046] The feeding method of the injection molding masterbatch centralized feeding system comprises the following steps:

[0047] S1. Adjust the volume of the material chamber: Calculate the total amount of different materials, under the premise of the same rotation speed of the drum 34, adjust the volume ratio of the material chamber according to the total amount ratio of different materials;

[0048] Among them, the adjustment method of the material cavity volume is:

[0049] The two blocks 36 in the same tank 35 are controlled to move closer to each other, so that the volume of the hopper is reduced;

[0050] The two blocks 36 in the same tank 35 are controlled to move away from each other, and the volume of the hopper increases;

[0051] S2. Primary transport: According to the total amount of materials corresponding to different storage tanks 10, the total amount of materials is transported to the interior of the temporary storage tank 20 via the meter 12;

[0052] S3. Secondary conveying: the drum 34 rotates, and the material falls into the material cavity which rotates to the upper part. The scraping part 311 scrapes off the excess material, and the material cavity rotates to the lower part and is input into the mixing tank 40 .

[0053] The injection molding masterbatch centralized feeding system in the technical solution controls a plurality of materials of different total amounts to be uniformly and synchronously fed into the mixing tank 40 at the same time during the material conveying process, controls the mass ratio between the different materials fed into the mixing tank 40, improves the uniformity of distribution between the different materials, and thus reduces the time required for material mixing;

[0054] In the first-stage conveying, a predetermined total amount of materials is conveyed from the storage tank 10 to the interior of the temporary storage tank 20 via the meter 12, and the material conveying amount is precisely controlled;

[0055] In the secondary conveying, the material in the temporary storage tank 20 is continuously conveyed to the interior of the mixing tank 40 by utilizing the material falling into the material cavity of a specific volume, ensuring that different total amounts of material are delivered to the destination within the same time, and the conveying volume in different time periods is accurately controlled.

[0056] To solve the problem of the roller 34 rotating inside the housing 31, as Figure 3 , Figure 4 , Figure 5 As shown, the regulating hopper 30 also includes a motor 32 assembled on the shell 31, and the output end of the motor 32 is connected to a long shaft 33, and the long shaft 33 is connected to the roller 34.

[0057] The motor 1 32 is powered on and started, and drives the roller 34 to rotate through the long shaft 33, thereby providing a power source for the rotation of the roller 34.

[0058] To achieve the change of the relative distance between the two blocks 36 located in the same slot 35, as Figure 3 , Figure 4 , Figure 5As shown, the long shaft 33 is sleeved with two side plates 37, and the two side plates 37 are respectively distributed on both sides of the roller 34. A plurality of blocks 36 are connected to the side plate 37 on the same side, that is, the same side plate 37 drives different blocks 36 on the same side to move together, so that the size of the material cavity on one roller 34 is consistent; an electric push rod 38 is arranged between the side plate 37 and the roller 34; a battery and a remote control switch matching the electric push rod 38 are arranged on the roller 34 to provide power for the electric push rod 38 and control the opening or closing of the electric push rod 38.

[0059] The overall length of the electric push rod 38 increases, driving the block 36 to move outside the trough body 35. At this time, the distance between the two blocks 36 increases, that is, the volume of the material chamber increases; the overall length of the electric push rod 38 decreases, driving the block 36 to move inside the trough body 35. At this time, the distance between the two blocks 36 decreases, that is, the volume of the material chamber decreases; the setting of the material chamber volume size is changed by controlling the change in the distance between the two blocks 36.

[0060] To further control the setting of the feeding amount in the regulating hopper 30, as Figure 4 As shown, the upper part of the shell 31 is configured as an arc segment 312 that matches the roller 34. After the material in the material cavity is scraped by the scraper portion 311, it contacts the arc segment 312. The setting of the arc segment 312 limits the material in the material cavity to prevent the material from falling out of the material cavity after passing over the scraper portion 311. In order to fill the material cavity with more material entering the material cavity, the stability of the feed rate is guaranteed.

[0061] The lower part of the shell 31 is configured as a straight section 313, so that there is a gap between the lower end of the roller 34 and the shell 31, which is convenient for the material to be discharged from the material cavity.

[0062] In order to meet the different requirements of different amounts of different materials in the injection molding process, for example, different amounts of masterbatch, additives, masterbatch, and recycled materials, the volume of the material cavity can be changed by changing the number and size of the slots 35, as shown in the following example: Figure 3 , Figure 4 , Figure 5 As shown, the number of the trough bodies 35 on different rollers 34 is different, and the sizes of the trough bodies 35 on different rollers 34 are different, so that multiple adjustment hoppers 30 can be adapted to materials of different amounts.

[0063] like Figure 1 , Figure 2 As shown, the lower end of the mixing tank 40 is provided with a discharge pipe, a valve is provided on the discharge pipe, and a stirring mechanism is provided inside the mixing tank 40 .

[0064] After the material is conveyed to the interior of the mixing tank 40 through the regulating hopper 30, it is stirred and sheared by the stirring mechanism. After the material is stirred until it is evenly distributed, the control valve is opened and the material is discharged to the injection molding machine through the discharge pipe.

[0065] In order to ensure the uniformity of material mixing, the materials are respectively put into different positions inside the mixing tank 40, as shown in the following: Figure 1 , Figure 2 As shown, an upper cover 41 and a lower cover 42 are provided at the upper end of the mixing tank 40, and a gap is provided between the upper cover 41 and the lower cover 42. An outer plate 43 covering the gap is provided on the outside of the mixing tank 40. The upper end of the outer plate 43 is fixedly connected to the upper cover 41, and the lower end of the outer plate 43 is rotatably matched with the lower cover 42. The feed pipe 21 is located on the outer plate 43.

[0066] In the present technical solution, the material is fed into the mixing tank 40 through the second feeding pipe 21, and the rotating setting of the mixing tank 40 causes the relative position between the mixing tank 40 and the second feeding pipe 21 to change, that is, the material output by the second feeding pipe 21 will be fed into different positions inside the mixing tank 40, thereby increasing the degree of dispersion of the material when it is fed into the mixing tank 40 and ensuring the uniformity of material mixing.

[0067] To realize the requirement of rotating the mixing tank 40, Figure 1 , Figure 2 As shown, the mixing tank 40 is sleeved with a base plate 44, and the base plate 44 and the mixing tank 40 are rotatably matched through a bearing 45. A motor 2 46 is provided on the base plate 44, and the output end of the motor 2 46 is connected to a gear 1 47, and the gear 1 47 is meshed with a gear 2 48, and the gear 2 48 is fixedly sleeved on the outside of the mixing tank 40.

[0068] The motor 2 46 is powered on and starts, and the mixing tank 40 is driven to rotate through the meshing gear 1 47 and the gear 2 48. The rotation direction is as follows: Figure 2 As shown by the arrow in , the rotation requirement of the mixing tank 40 is solved.

[0069] The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them.

Claims

1. Injection molding masterbatch centralized feeding system, characterized in that: A plurality of storage tanks (10), wherein the upper end of each storage tank (10) is provided with a feed port, and a feed pipe (11) is provided through the lower end of each storage tank (10), and a meter (12) is provided on the feed pipe (11); The number of temporary storage tanks (20) is the same as that of the storage tanks (10), the upper end of each temporary storage tank (20) is connected to the first material delivery pipe (11), and the lower end of each temporary storage tank (20) is provided with a second material delivery pipe (21); An adjusting hopper (30) is correspondingly arranged on each second material delivery pipe (21), the adjusting hopper (30) comprising a shell (31), a scraping portion (311) is formed at the position where the upper part of the shell (31) is connected to the second material delivery pipe (21), a roller (34) is rotatably arranged inside the shell (31), a plurality of grooves (35) are axially opened on the roller (34), both ends of each of the grooves (35) are slidably matched with a block (36), and the gap between the two blocks (36) and the groove (35) forms a material cavity; A mixing tank (40), wherein a plurality of the second material delivery pipes (21) are connected to the same mixing tank (40); By changing the distance between the two blocks (36), the volume of the material chamber in the different adjustment hoppers (30) is adjusted, and a predetermined total amount of material is input from the storage tank (10) into the interior of the temporary storage tank (20) through the metering device (12), and the material falls into the material chamber that rotates to the upper side, and the excess material is scraped off by the scraping part (311), and the material chamber rotates to the lower side and is input into the interior of the mixing tank (40).

2. The centralized injection molding masterbatch feeding system according to claim 1, characterized in that: The regulating hopper (30) further comprises a motor 1 (32) mounted on the housing (31), the output end of the motor 1 (32) being connected to a long shaft (33), and the long shaft (33) being connected to a roller (34).

3. The centralized injection molding masterbatch feeding system according to claim 2, characterized in that: The long shaft (33) is sleeved with two side plates (37), the two side plates (37) are respectively distributed on both sides of the drum (34), and the plurality of blocks (36) are connected to the side plates (37) located on the same side; An electric push rod (38) is provided between the side plate (37) and the roller (34).

4. The centralized injection molding masterbatch feeding system according to claim 3, characterized in that: The upper portion of the shell (31) is configured as an arc segment (312) matching the roller (34), and the lower portion of the shell (31) is configured as a straight segment (313).

5. The centralized injection molding masterbatch feeding system according to claim 1, characterized in that: The number of the grooves (35) on different rollers (34) is different, and the sizes of the grooves (35) on different rollers (34) are different.

6. The centralized injection molding masterbatch feeding system according to claim 1, characterized in that: The mixing tank (40) has a discharge pipe at the lower end thereof, a valve is arranged on the discharge pipe, and a stirring mechanism is arranged inside the mixing tank (40).

7. The centralized injection molding masterbatch feeding system according to claim 6, characterized in that: The upper end of the mixing tank (40) is provided with an upper cover (41) and a lower cover (42), a gap is provided between the upper cover (41) and the lower cover (42), an outer plate (43) covering the gap is provided on the outside of the mixing tank (40), the upper end of the outer plate (43) is fixedly connected to the upper cover (41), the lower end of the outer plate (43) is rotatably matched with the lower cover (42), and the second feed pipe (21) is located on the outer plate (43).

8. The centralized injection molding masterbatch feeding system according to claim 7, characterized in that: The mixing tank (40) is sleeved with a base plate (44), and the base plate (44) and the mixing tank (40) are rotatably matched via a bearing (45). A second motor (46) is arranged on the base plate (44), and an output end of the second motor (46) is connected to a first gear (47), and the first gear (47) is meshed with a second gear (48), and the second gear (48) is fixedly sleeved on the outside of the mixing tank (40).

9. The feeding method of the injection molding masterbatch centralized feeding system according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Adjusting the volume of the material chamber: Calculate the total amount of different materials, under the premise that the drum (34) rotates at the same speed, adjust the volume ratio of the material chamber according to the total amount ratio of different materials; S2. Primary transport: According to the total amount of materials corresponding to different storage tanks (10), the total amount of materials is transported to the interior of the temporary storage tank (20) via the meter (12); S3. Secondary conveying: The drum (34) rotates, and the material falls into the material cavity that rotates to the top. The scraping part (311) scrapes off the excess material, and the material cavity rotates to the bottom and is input into the mixing tank (40).

10. The feeding method of the injection molding masterbatch centralized feeding system according to claim 9, characterized in that: In step S1, the volume of the material chamber is adjusted in the following manner: The two blocks (36) in the same tank (35) are controlled to move closer to each other, so that the volume of the hopper is reduced; The two blocks (36) inside the same tank (35) are controlled to move away from each other, thereby increasing the volume of the hopper.

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