Plastic color mixer and working method

Abstract

This invention provides a plastic color mixing machine and its working method. The plastic color mixing machine includes a grinding head, which includes a main channel, a receiving groove, and two or more converging channels. The two or more converging channels are arranged around the main channel and connect the main channel and the receiving groove. One end of the converging channel near the main channel has a converging outlet, and the other end of the converging channel near the receiving groove has a converging inlet. The width of the converging inlet is greater than the width of the converging outlet. The second material is diverted through the converging channels, reducing the amount of the second material in each converging channel. Thus, a small amount of the second material is output from the converging channels at different positions for mixing. At the same time, the second material can flow into the main channel in different radial directions, resulting in good color mixing effect. Since the width of the converging inlet is greater than the width of the converging outlet, the material entering the main channel will not flow back to the converging inlet.

Description

Technical Field

[0001] This invention relates to the field of injection molding machines, and more specifically to a plastic color mixing machine and its working method. Background Technology

[0002] In existing two-color injection molding machine technology, two-color injection molding is achieved through the cooperation of two barrels and nozzles. However, when different colored liquids enter the nozzle, backflow of liquid is inevitable. When different colored liquids flow back into the material cavity, they contaminate the liquid, thus affecting the quality of the entire injection molded product. In existing two-color injection molding machines, a single hydraulic control component is used to control the material tubes. The two material tubes may interfere with each other, causing malfunctions in both material tubes.

[0003] Chinese patent application number 201420170087.2, published on December 17, 2014, discloses a hydraulic control system and a two-color injection molding machine. The nozzle in this machine is a dual-channel, single-outlet nozzle, with one-way valves installed in each of the two channels. The hydraulic control system uses dual hydraulic control groups to control the two channels. The one-way valves in the nozzle's dual channels prevent the backflow of the two liquids, avoiding mixing and contamination due to backflow into the barrel. This injection molding machine, by using one-way valves to prevent backflow, requires opening the valves before each discharge, resulting in a complex structure. Furthermore, the second channel only has one outlet, meaning the material in the second channel can only flow into the main channel from the inlet. The large discharge volumes from the first and second channels, coupled with the inability to allow material to flow into the main channel from different locations, prevent the formation of a mixed color effect, resulting in poor color mixing. Summary of the Invention

[0004] This invention provides a plastic color mixing machine and its working method. The first material cylinder is supported by the flat part of the nozzle seat, and the second material cylinder is supported by the inclined part of the nozzle seat, which reduces the space required for the installation of the first and second material cylinders. The flow is divided by the confluence channel, which reduces the amount of second material in each confluence channel. A small amount of second material is output from the confluence channels at different positions for mixing, resulting in a good color mixing effect. To achieve the above objectives, the technical solution of the present invention is: a plastic color mixing machine, comprising a nozzle seat, a first material cylinder, and a second material cylinder, wherein a first flow channel and a second flow channel are provided in the nozzle seat. A flat portion is provided on the top surface of the nozzle seat, and an inclined portion is provided between the flat portion and the bottom surface of the nozzle seat. A first recessed portion is provided in the flat portion, and a second recessed portion is provided in the inclined portion.

[0005] The first material cylinder abuts against the flat part, and one end of the first material cylinder extends into the first recess, which is connected to the first flow channel. The first outlet of the first material cylinder passes through the first recess and extends into the first flow channel. The second material cylinder abuts against the inclined part, and one end of the second material cylinder extends into the second recess, which is connected to the second flow channel. The second outlet of the second material cylinder passes through the second recess and extends into the second flow channel. A cavity is provided at the bottom of the nozzle seat, and a grinding head is provided in the cavity. The grinding head is located below the first and second flow channels.

[0006] The grinding head includes a main flow channel, a receiving groove, and two or more converging channels. The two or more converging channels are arranged around the main flow channel and connect the main flow channel and the receiving groove.

[0007] The confluence channel has a confluence outlet at one end near the main flow channel and a confluence inlet at one end near the receiving trough. The width of the confluence inlet is greater than the width of the confluence outlet. An outwardly extending feed inlet is provided on the side of the receiving trough away from the confluence channel. The main flow channel is correspondingly set and connected to the first flow channel, and the feed inlet is correspondingly set and connected to the second flow channel. A feed nozzle is provided below the grinding head and is connected to the main flow channel.

[0008] The above setup supports the first and second material cylinders via the nozzle seat. The first material cylinder is vertically positioned on the nozzle seat, while the second material cylinder is inclined, reducing the length of the nozzle seat and allowing both the first and second material cylinders to feed material to the nozzle seat simultaneously.

[0009] The first discharge port of the first discharge cylinder extends into the first flow channel, and the second discharge port of the second discharge cylinder extends into the second flow channel; so that the first discharge port is aligned with the first flow channel and the second discharge port is aligned with the second flow channel; thus preventing material from overflowing from the first and second flow channels.

[0010] The grinding head is connected to the main flow channel and the receiving trough through a confluence channel, and the main flow channel is set to correspond to the first flow channel, and the feed inlet is set to correspond to the second flow channel. In this way, the first material output from the first material cylinder flows into the main flow channel through the first flow channel, and the second material output from the second material cylinder flows into the feed inlet through the second flow channel, and then flows into two or more confluence channels through the receiving trough, and then into the main flow channel. By controlling the alternating feeding of the first material cylinder and the second material cylinder, the main flow channel outputs mixed materials of different colors.

[0011] With two or more confluence channels arranged around the main channel, the second material output from the second cylinder can flow into the main channel in different radial directions, resulting in a good color mixing effect. At the same time, the arrangement of two or more confluence channels reduces the amount of second material in each confluence channel, and allows small amounts of second material to be output from confluence channels at different locations for mixing, resulting in a good color mixing effect between the second material and the first material.

[0012] Meanwhile, the width of the confluence inlet is greater than the width of the confluence outlet, so the material entering the main channel will not flow back to the confluence inlet, thus preventing the first material in the main channel from flowing back into the receiving tank and mixing with the second material; the structure of the confluence channel avoids material backflow, has good reliability, and is simple in structure.

[0013] Furthermore, the receiving groove is a ring-shaped receiving groove.

[0014] The above setup, by setting up a ring-shaped receiving trough around the main channel, allows the receiving trough to supply material to different confluence channels along different axial directions of the main channel.

[0015] Furthermore, the width of the confluence channel gradually decreases from the confluence inlet towards the confluence outlet. This further restricts material backflow.

[0016] Furthermore, the cross-sectional width of the inlet is smaller than the cross-sectional width of the second flow channel.

[0017] With the above settings, when the second material enters the inlet, the flow rate of the second material is accelerated due to the reduced cross-sectional width of the inlet.

[0018] Furthermore, the grinding head has two or more through holes, and the top surface of the nozzle seat cavity has two or more threaded holes. Bolts pass through the through holes and are threaded into the threaded holes. This achieves a stable connection between the grinding head and the nozzle seat.

[0019] Furthermore, the grinding head is equipped with two or more locating pins. These locating pins enable quick positioning of the grinding head during installation; simultaneously, by setting two locating pins, the grinding head is aligned with the nozzle seat, preventing misalignment between the grinding head and the nozzle seat.

[0020] This invention also provides a method for operating a plastic color mixing machine, characterized by the following steps: S1, alternately control the discharge of the first and second material cylinders; discharge of the first material cylinder proceeds to S2; discharge of the second material cylinder proceeds to S3-S4.

[0021] S2, the first material output from the first barrel flows into the main flow channel through the first flow channel.

[0022] S3, the second material output from the second barrel flows into the inlet through the second flow channel.

[0023] S4. The second material enters the receiving tank and is diverted into two or more confluence channels. Then, the second material flows into the main channel from different radial directions of the main channel.

[0024] The above method, by controlling the alternating feeding of the first and second feed cylinders, enables the main channel to output mixed materials of different colors. Simultaneously, the second material is diverted through the confluence channel, reducing the amount of second material in each confluence channel. This allows small amounts of second material to be output from different confluence channels for mixing. Furthermore, the second material can flow into the main channel in different radial directions, resulting in good color mixing. Because the width of the confluence inlet is greater than the width of the confluence outlet, the material entering the main channel will not flow back towards the confluence inlet. Attached Figure Description Figure 1 This is a cross-sectional view of the present invention.

[0025] Figure 2 This is an enlarged view of B in this invention.

[0026] Figure 3 This is a cross-sectional view of the nozzle seat in this invention.

[0027] Figure 4 This is a three-dimensional schematic diagram of the nozzle seat in this invention.

[0028] Figure 5 This is a bottom view of the nozzle seat in this invention.

[0029] Figure 6 This is a schematic diagram of the grinding head in this invention.

[0030] Figure 7 The present invention refers to a mixed-color material with different colors. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1-7 As shown, a plastic color mixing machine includes a nozzle seat 1, a first material cylinder 2, and a second material cylinder 3. The nozzle seat 1 has a flat portion 11 and an inclined portion 12. The flat portion 11 is disposed on the top surface of the nozzle seat 1, and the inclined portion 12 is inclined between the flat portion 11 and the bottom surface of the nozzle seat 1. The nozzle seat supports the first and second material cylinders. The first material cylinder is vertically disposed on the nozzle seat, and the second material cylinder is inclinedly disposed on the nozzle seat, reducing the length of the nozzle seat so that the first and second material cylinders can simultaneously feed material to the nozzle seat.

[0033] The first material cylinder 2 is disposed on the flat portion 11, and the second material cylinder 3 is disposed on the inclined portion 12. The first material cylinder 2 and the second material cylinder 3 are supported by the nozzle seat 1. The flat portion 11 has a first recess 111, and the inclined portion 12 has a second inclined portion 121. One end of the first material cylinder 2 extends into the first recess 111, and one end of the second material cylinder 3 extends into the second recess 121. The nozzle seat 1 has a first flow channel 13 and a second flow channel 14. The first recess 111 communicates with the first flow channel 13, and the second recess 121 communicates with the second flow channel 14. The first discharge port of the first material cylinder 2 passes through the first recess 111 and extends into the first flow channel 13, and the second discharge port of the second material cylinder 3 passes through the second recess 121 and extends into the second flow channel 14, so that the first discharge port is aligned with the first flow channel 13, and the second discharge port is aligned with the second flow channel 14, thus preventing material from overflowing from the first flow channel 13 and the second flow channel 14.

[0034] A cavity 15 is provided at the bottom of the nozzle seat 1, and a grinding head 4 is installed inside the cavity 15. The grinding head 4 is located below the first flow channel 13 and the second flow channel 14. The grinding head 4 has two or more through holes 44 and two or more positioning pins 45. The top surface of the cavity 15 of the nozzle seat 1 has two or more threaded holes 15 and two or more positioning holes 16. The positioning pins 45 are disposed in the positioning holes 16, and bolts (not shown in the figure) pass through the through holes 44 and are threadedly connected to the threaded holes 15. This achieves a stable connection between the grinding head 4 and the nozzle seat 1. The positioning pins 45 enable quick positioning of the grinding head 4 during installation; simultaneously, by providing two or more positioning pins 45, the grinding head 4 is aligned with the nozzle seat 1, preventing misalignment between the grinding head 4 and the nozzle seat 1.

[0035] The grinding head 4 includes a main flow channel 41, a receiving groove 42, and two or more converging channels 43. The two or more converging channels 43 are arranged around the main flow channel 41 and connect the main flow channel 41 and the receiving groove 42. In this embodiment, the receiving groove 42 is annularly arranged. The receiving groove 42 is arranged around the main flow channel 41, and thus the receiving groove 42 feeds material to different converging channels 43 along different axial directions of the main flow channel 41.

[0036] The confluence channel 43 has a confluence outlet 432 at one end near the main flow channel 41 and a confluence inlet 431 at one end near the receiving groove 42. The width of the confluence inlet 431 is greater than the width of the confluence outlet 432. An outwardly extending feed inlet 421 is provided on the side of the receiving groove 42 away from the confluence channel 43. The main flow channel 41 is correspondingly arranged and connected to the first flow channel 13, and the feed inlet 421 is correspondingly arranged and connected to the second flow channel 14. A feed nozzle is provided below the grinding head 4, and the feed nozzle is connected to the main flow channel 41.

[0037] The grinding head 4 is connected to the main flow channel 41 and the receiving trough 42 through the confluence channel 43, and the main flow channel 41 is set to correspond with the first flow channel 13, and the feed inlet 421 is set to correspond with the second flow channel 14. In this way, the first material output from the first material cylinder 2 flows into the main flow channel 41 through the first flow channel, and the second material output from the second material cylinder 3 flows into the feed inlet 421 through the second flow channel, and then flows into two or more confluence channels 43 through the receiving trough 42, and then into the main flow channel 41. By controlling the alternating feeding of the first material cylinder 2 and the second material cylinder 3, the main flow channel 41 outputs mixed materials with different colors.

[0038] Two or more confluence channels 43 are arranged around the main flow channel 41, so that the second material output from the second cylinder can flow into the main flow channel 41 in different radial directions, forming an effect of alternating mixing of the first material and the second material, resulting in a good color mixing effect. At the same time, the arrangement of two or more confluence channels 43 reduces the amount of second material in each confluence channel 43, and then outputs a small amount of second material through confluence channels 43 at different positions for mixing, resulting in a good color mixing effect between the second material and the first material.

[0039] Meanwhile, the width of the confluence inlet 431 is greater than the width of the confluence outlet 432, so the material entering the main channel 41 will not flow back to the confluence inlet 431, thus preventing the first material in the main channel 41 from flowing back into the receiving tank 42 and mixing with the second material; the structure of the confluence channel 43 prevents material backflow, has good reliability, and has a simple structure.

[0040] In this embodiment, the width of the confluence channel 43 gradually decreases from the confluence inlet 431 towards the confluence outlet 432, thus further restricting material backflow; the cross-sectional width L1 of the feed inlet 421 is smaller than the cross-sectional width L2 of the second flow channel 14. When the second material enters the feed inlet 421, the flow rate of the second material is accelerated due to the reduced cross-sectional width of the feed inlet 421.

[0041] A method for operating a plastic color mixing machine includes the following steps: S1, alternately control the discharge of the first and second material cylinders; discharge of the first material cylinder proceeds to S2; discharge of the second material cylinder proceeds to S3-S4.

[0042] S2, the first material output from the first barrel flows into the main flow channel through the first flow channel.

[0043] S3, the second material output from the second barrel flows into the inlet through the second flow channel.

[0044] S4. The second material enters the receiving tank and is diverted into two or more confluence channels. Then, the second material flows into the main channel from different radial directions of the main channel.

[0045] The above method, by controlling the alternating feeding of the first and second feed cylinders, enables the main channel to output mixed materials of different colors. Simultaneously, the second material is diverted through the confluence channel, reducing the amount of second material in each confluence channel. This allows small amounts of second material to be output from different confluence channels for mixing. Furthermore, the second material can flow into the main channel in different radial directions, resulting in good color mixing. Because the width of the confluence inlet is greater than the width of the confluence outlet, the material entering the main channel will not flow back towards the confluence inlet.

Claims

1. A plastic color mixing machine, comprising a nozzle seat, a first material cylinder, and a second material cylinder, wherein a first flow channel and a second flow channel are provided in the nozzle seat, characterized in that: A flat portion is provided on the top surface of the nozzle seat, and an inclined portion is provided between the flat portion and the bottom surface of the nozzle seat. A first recessed portion is provided in the flat portion, and a second recessed portion is provided in the inclined portion. The first material cylinder abuts against the flat part, and one end of the first material cylinder extends into the first recess, the first recess is connected to the first flow channel, and the first outlet of the first material cylinder passes through the first recess and extends into the first flow channel. The second material cylinder abuts against the inclined part, and one end of the second material cylinder extends into the second recess, the second recess is connected to the second flow channel, and the second outlet of the second material cylinder passes through the second recess and extends into the second flow channel. A cavity is provided at the bottom of the nozzle seat, and a grinding head is provided inside the cavity. The grinding head is located below the first flow channel and the second flow channel. The grinding head includes a main flow channel, a receiving groove, and two or more converging channels. The two or more converging channels are arranged around the main flow channel and connect the main flow channel and the receiving groove. The receiving groove is a ring-shaped receiving groove; The confluence channel has a confluence outlet at one end near the main flow channel and a confluence inlet at one end near the receiving trough. The width of the confluence inlet is greater than the width of the confluence outlet. The width of the confluence channel gradually decreases from the confluence inlet towards the confluence outlet. An outwardly extending feed inlet is provided on the side of the receiving trough away from the confluence channel. The main flow channel is correspondingly set and connected to the first flow channel, and the feed inlet is correspondingly set and connected to the second flow channel. A feed nozzle is provided below the grinding head and is connected to the main flow channel. The cross-sectional width L1 of the feed inlet is smaller than the cross-sectional width L2 of the second flow channel. The discharge from the first and second feed cylinders is alternately controlled.

2. The plastic color mixing machine according to claim 1, characterized in that: The grinding head has two or more through holes, and the top surface of the cavity of the feed nozzle seat has two or more threaded holes. Bolts pass through the through holes and are threadedly connected to the threaded holes.

3. A plastic color mixing machine according to claim 2, characterized in that: The grinding head has two or more locating pins.

4. The working method of a plastic color mixing machine according to any one of claims 1-3, characterized in that: Includes the following steps: S1, alternately control the discharge of the first and second material cylinders; discharge of the first material cylinder proceeds to S2; discharge of the second material cylinder proceeds to S3-S4; S2, the first material output from the first barrel flows into the main channel through the first flow channel; S3, the second material output from the second barrel flows into the inlet through the second flow channel; S4. The second material entering the receiving tank is diverted into two or more confluence channels, and then the second material flows into the main channel from different radial directions of the main channel.

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