Internal mixer for color changing of plastic products

Abstract

The present invention belongs to the field of plastic processing, and specifically relates to an internal mixer for color change of plastic products, including a platform and an internal mixing chamber arranged above the platform, the internal mixing mechanism including a driving device and an axle seat symmetrically arranged outside the internal mixing chamber, the output end of the driving device is connected to a rotor rotating along the axle seat, and a internal mixing cavity is clamped between the two rotors; the feeding mechanism includes at least two feeding end seats, and a scraper is arranged on the upper part of the feeding end seat; a plurality of feeding end seats installed above the internal mixing chamber are arranged, and masterbatch feeding and plastic feeding are respectively performed at different temperatures, and the plastic liquid or masterbatch after hot melt pretreatment is injected into the internal mixing chamber for internal mixing to improve the color mixing effect. During the internal mixing process, the auger blades are controlled by the rotation of the auger motor and the stirring shaft, and another rotation stirring direction in the vertical direction is added. Under the dual stirring of horizontal and vertical, the strength of the plastic after the fluid masterbatch and the fluid plastic are mixed is increased.

Description

Technical Field

[0001] The invention relates to the field of plastic processing, and in particular to an internal mixer for color changing of plastic products. Background Art

[0002] Internal mixer is a commonly used rubber processing machine, which is widely used in various rubber products industries. It is mainly used to mix and process rubber materials and pressurize the materials into shape. Plastic masterbatch mixer is an efficient mixing equipment, which is specially used for the mixing and production of plastic masterbatches. It can evenly mix plastic masterbatches of different colors to ensure the color consistency and stability of the product.

[0003] The working principle of the internal mixer is mainly realized through its internal rotor, mixing chamber, feeding and pressing devices, etc. During operation, the materials are added to the mixing chamber and mixed under the action of the rotor.

[0004] The prior art has the following problems:

[0005] The color change of plastic products is to mix plastic particles and masterbatches, but there is a difference in the hot melting temperature between masterbatches and plastic particles. The heating temperature in the existing mixing chamber is constant. Overheating will cause excessive hot melting of plastic particles, and insufficient temperature will cause insufficient hot melting of masterbatches. The existing internal mixer has the problem of insufficient hot melting control, which has a certain impact on the output of mixed-color plastics. Summary of the invention

[0006] (I) Purpose of the invention

[0007] In order to solve the technical problems existing in the background technology, the present invention proposes an internal mixer for color changing of plastic products, which has the characteristics of stable color mixing, high strength of output plastic and saving heating cost.

[0008] (II) Technical solution

[0009] In order to solve the above technical problems, the present invention provides an internal mixer for color change treatment of plastic products, comprising a platform and an internal mixing chamber arranged above the platform, the internal mixing mechanism comprising a driving device and an axle seat symmetrically arranged outside the internal mixing chamber, the output end of the driving device is connected to a rotor rotating along the axle seat, and a internal mixing cavity is sandwiched between the two rotors;

[0010] The feeding mechanism includes at least two feeding end seats, a scraper is arranged on the upper part of the feeding end seat, a partition plate is arranged at one end of the lower part contacting the inner cavity of the mixing chamber, a hanging seat is arranged on the upper part of the scraper, an auger motor is arranged in the hanging seat, an auger shaft penetrating the scraper is connected to the output end of the auger motor, an auger blade with a spiral structure is sleeved on the outer wall of the auger shaft, and the partition plate is connected to the bottom, and a plurality of heaters are clamped between the feeding end seat and the partition plate;

[0011] The lifting mechanism comprises a vertical plate arranged at one side of the feeding end seat, the vertical plate is connected with a lifting cylinder, a movable lifting rod is installed at the output end of the lifting cylinder, and the other end of the lifting rod is connected with a hanging seat.

[0012] Preferably, a through feeding port is provided between the feeding end seat and the mixing chamber, and the opening specification of the feeding port is smaller than the specification of the partition plate and is the same as the specification of the scraper.

[0013] Preferably, the outer wall of the scraper is tightly attached to the inner wall of the feeding end seat, and the bottom end wall of the scraper is an inclined structure.

[0014] Preferably, a feeding port is provided on the side wall of the feeding end seat, one of the feeding end seats is used for feeding masterbatch, and the remaining feeding end seats are used for feeding plastic.

[0015] Preferably, a section of the auger blade penetrating into the inner cavity of the mixing chamber is located between the two rotors.

[0016] Preferably, the auger blades are heat-conducting structures, and the heaters are equidistantly mounted on the auger blades.

[0017] Preferably, the inner cavity of the mixing chamber is provided with a ramp inclined toward the discharge port, and the ramp has a built-in heating structure.

[0018] Preferably, the material taking mechanism includes a material taker arranged below the discharge port of the mixing chamber, a push rod cylinder is arranged on one side of the material taker, a movable push rod is installed at the output end of the push rod cylinder, the other end of the push rod is connected to an angle seat, and a leakage plate for blocking the material taker is connected to the angle seat.

[0019] Preferably, a discharge channel is combined between the discharge port of the mixing chamber and the material extractor, and the discharge channel is separated by the leakage plate.

[0020] Preferably, the push rod cylinder is installed on the bottom of the platform through an "L-shaped" structure support.

[0021] The above technical solution of the present invention has the following beneficial technical effects:

[0022] 1. Set up several feeding end seats installed above the mixing chamber, feed masterbatch and plastic at different temperatures, inject the plastic liquid or masterbatch after hot melt pretreatment into the mixing chamber for mixing, and improve the color mixing effect.

[0023] 2. During the mixing process, the auger blades are controlled by the auger motor and the stirring shaft to rotate, adding another rotating stirring direction in the vertical direction. Under the dual stirring of horizontal and vertical directions, the strength of the plastic after the fluid mother liquor and fluid plastic are mixed is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a schematic diagram of the internal structure of the mixing chamber of the present invention;

[0026] Figure 3 It is a schematic cross-sectional structural diagram of the mixing chamber of the present invention;

[0027] Figure 4 It is a schematic diagram of the first embodiment of the present invention;

[0028] Figure 5 It is a schematic diagram of the second embodiment of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the feeding mechanism of the present invention;

[0030] Figure 7 It is a schematic structural diagram of the material taking mechanism of the present invention.

[0031] Reference numerals:

[0032] 1. Platform; 2. Mixing chamber; 31. Driving device; 32. Shaft seat; 33. Rotor; 34. Slope platform; 41. Vertical plate; 42. Lifting cylinder; 43. Lifting rod; 51. Feeding end seat; 52. Hanging seat; 53. Scraper; 54. Auger motor; 55. Auger shaft; 56. Auger blade; 57. Partition plate; 6. Heater; 71. Feeder; 72. Support; 73. Push rod cylinder; 74. Push rod; 75. Angle seat; 76. Leakage plate. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0034] like Figure 1-7As shown, the present invention provides an internal mixer for color change of plastic products, comprising a platform 1 and an internal mixing chamber 2 arranged above the platform 1, the internal mixing mechanism comprising a driving device 31 and an axle seat 32 symmetrically arranged outside the internal mixing chamber 2, the output end of the driving device 31 is connected to a rotor 33 rotating along the axle seat 32, and a internal mixing cavity is sandwiched between the two rotors 33;

[0035] The feeding mechanism includes at least two feeding end seats 51, a scraper 53 is arranged on the upper part of the feeding end seat 51, a partition plate 57 is arranged at one end of the lower part contacting the inner cavity of the mixing chamber 2, a hanging seat 52 is arranged on the upper part of the scraper 53, an auger motor 54 is arranged in the hanging seat 52, an auger shaft 55 penetrating the scraper 53 is connected to the output end of the auger motor 54, an auger blade 56 with a spiral structure is sleeved on the outer wall of the auger shaft 55, and a partition plate 57 is connected to the bottom, and a plurality of heaters 6 are sandwiched between the feeding end seat 51 and the partition plate 57;

[0036] The lifting mechanism includes a vertical plate 41 arranged on one side of the feeding end seat 51, a lifting cylinder 42 is connected to the vertical plate 41, a movable lifting rod 43 is installed at the output end of the lifting cylinder 42, and the other end of the lifting rod 43 is connected to the hanging seat 52.

[0037] It should be noted that: in the present application, a total of eight feeding end seats 51 are arranged, which are installed at equal intervals above the mixing chamber. One of the feeding end seats 51 is used for feeding masterbatch, and the remaining seven feeding end seats 51 are used for feeding plastic. When changing the color of plastic products, the plastic raw materials and masterbatch raw materials are pre-treated by the feeding end seats 51 and then placed in the mixing chamber.

[0038] Among them, masterbatch is a special colorant for plastics. Masterbatch is composed of three basic elements: pigment or dye, carrier and additive. It is an aggregate made by evenly loading an extraordinary amount of pigment into the resin. It can be called a pigment concentrate, so its tinting power is higher than the pigment itself. During processing, a small amount of masterbatch is mixed with uncolored resin to achieve a colored resin or product with a designed pigment concentration.

[0039] As an example of feeding the feeding end seat 51: the side wall of the feeding end seat is provided with a feeding port for placing masterbatch or plastic.

[0040] As an example of feeding from the feeding end seat 51 to the mixing chamber 2: a through feeding port is left between the feeding end seat 51 and the mixing chamber 2, the opening specification of the feeding port is smaller than the specification of the partition plate 57, and is the same as the specification of the scraper 53. When the partition plate 57 contacts the feeding port, the feeding end seat 51 is in a sealed state, and the plastic particles or masterbatches are hot-melt pre-treated in the corresponding feeding end seat 51.

[0041] It can be understood that, because the outer wall of the scraper 53 is tightly attached to the inner wall of the feeding end seat 51, when the scraper 53 is controlled by the lifting rod 43 to slide along the inner cavity of the feeding end seat 51, the bottom end wall of the scraper 53 is an inclined structure, which can push the hot melt plastic liquid or masterbatch during the sliding process. Since the partition plate 57 moves in the inner cavity of the mixing chamber 2, the plastic liquid or masterbatch enters the mixing chamber 2 for mixing.

[0042] As an example of masterbatch pretreatment, the masterbatch is placed in the inner cavity of the feeding end seat 51, and the auger motor 53 drives the auger blade 56 connected to the auger shaft 55 to rotate, which pushes the masterbatch particles downward on the one hand, and stirs the masterbatch particles during the rotation process. At this time, the heater 6 is adjusted to a temperature suitable for the hot melting of the masterbatch particles, and heat is released to hot melt the masterbatch particles, and the masterbatch particles are transformed from solid to fluid. After the hot melting is completed, the lifting mechanism works, and the lifting cylinder drives the lifting rod 43 to extend, driving the partition plate 57 to move, connecting the feeding channel of the feeding end seat 51 and the mixing chamber 2, and the hot-melted fluid masterbatch is input into the mixing chamber 2 for mixing and mixing.

[0043] As an example of plastic particle pretreatment, the plastic particles are placed into the inner cavities of the remaining feeding end seats 51, and the auger motor 53 drives the auger blades 56 connected to the auger shaft 55 to rotate, thereby pushing the plastic particles downward on the one hand and stirring the plastic particles during the rotation process. At this time, the heater 6 is adjusted to a temperature suitable for hot melting of the plastic particles, and heat is released to hot melt the plastic particles, thereby converting the plastic particles from solid to fluid. After the hot melting is completed, the lifting mechanism works, and the lifting cylinder drives the lifting rod 43 to extend, driving the partition plate 57 to move, connecting the feeding channel of the feeding end seat 51 and the mixing chamber 2, and inputting the hot-melted fluid plastic liquid into the mixing chamber 2 for mixing and mixing.

[0044] It should be added that the auger blades 56 are heat-conducting structures, and the heaters 6 are equidistantly installed on the auger blades 56. The heater 6 can set different heating temperatures according to the plastic particles and the masterbatch. Generally, the thermal melting temperature of the masterbatch is higher than the thermal melting temperature of the plastic. During the heat release process of the heater 6, the auger blades 56 can assist in heat dissipation in addition to stirring, and assist in the thermal melting of the masterbatch particles and the plastic particles, thereby ensuring that the fluid masterbatch and the fluid plastic entering the mixing chamber 2 are mixed at the optimal temperature.

[0045] like Figure 5 As shown, during the internal mixing process, the scraper 53 acts as a closing mechanism for the feeding port of the internal mixing chamber 2 to ensure that the internal mixing chamber 2 is in a closed state;

[0046] During the mixing process, two sets of driving devices 31 drive the rotor 33 at the output end to rotate in the shaft seat 32. During the horizontal rotation process, the protrusions on the rotor 33 stir and mix the fluid masterbatch and the fluid plastic. Because the auger blades 56 of each feeding end seat 51 penetrate into the inner cavity of the mixing chamber 2 for a section located between the two rotors 33, the auger blades 56 are controlled by the rotation of the auger motor 54 and the stirring shaft 55, which adds another rotation stirring direction in the vertical direction. Under the dual stirring of horizontal and vertical, the plastic strength after the fluid masterbatch and the fluid plastic are mixed is increased.

[0047] It should be added that the inner cavity of the mixing chamber 2 is provided with a ramp 34 inclined toward the discharge port. The inclined ramp 34 can move the mixed fluid masterbatch and fluid plastic toward the discharge port, while reducing the mixing space, increasing the contact surface between the fluid masterbatch and the fluid plastic, and indirectly enhancing the strength of the mixed plastic liquid.

[0048] The ramp 34 has a built-in heating structure, which is used for heat preservation to ensure that the plastic liquid is in a basic hot melt state.

[0049] like Figure 1 and Figure 7 As shown, the material taking mechanism includes a material taker 71 arranged below the discharge port of the mixing chamber 2, a push rod cylinder 73 is arranged on one side of the material taker 71, and the push rod cylinder 73 is installed on the bottom of the platform 1 through an "L-shaped" structure support 72, and a movable push rod 74 is installed at the output end of the push rod cylinder 73, and the other end of the push rod 74 is connected to an angle seat 75, and the angle seat 75 is connected to a leakage plate 76 for blocking the material taker 71.

[0050] When the material is taken after the mixing is completed, the push rod cylinder 73 pulls the push rod 74 to move, and the leakage plate 76 connected to the angle seat 74 leaves the material taker 71. The discharge channel combined between the discharge port of the mixing chamber 2 and the material taker 71 is separated by the leakage plate 76. After the leakage plate 76 moves, the mixed plastic liquid is discharged through the leakage plate 76.

[0051] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. An internal mixer for color change of plastic products, characterized in that: It comprises a platform (1) and a mixing chamber (2) arranged above the platform, wherein the mixing mechanism comprises a driving device (31) and a shaft seat (32) symmetrically arranged outside the mixing chamber (2), an output end of the driving device (31) is connected to a rotor (33) rotating along the shaft seat (32), and a mixing chamber is sandwiched between two rotors (33); The feeding mechanism comprises at least two feeding end seats (51), a scraper (53) is arranged on the upper part of the feeding end seat (51), and a partition plate (57) is arranged at one end of the lower part contacting the inner cavity of the mixing chamber (2), a hanging seat (52) is arranged on the upper part of the scraper (53), an auger motor (54) is arranged in the hanging seat (52), an output end of the auger motor (54) is connected to an auger shaft (55) passing through the scraper (53), an outer wall of the auger shaft (55) is provided with an auger blade (56) with a spiral structure, and the bottom is connected to the partition plate (57), and a plurality of heaters (6) are sandwiched between the feeding end seat (51) and the partition plate (57); The lifting mechanism comprises a vertical plate (41) arranged on one side of the feeding end seat (51), a lifting cylinder (42) being connected to the vertical plate (41), a movable lifting rod (43) being installed at the output end of the lifting cylinder (42), and the other end of the lifting rod (43) being connected to a hanging seat (52); A section of the auger blade (56) that penetrates into the inner cavity of the mixing chamber (2) is located between the two rotors (33).

2. The internal mixer for color change of plastic products according to claim 1, characterized in that: A through feeding port is provided between the feeding end seat (51) and the mixing chamber (2), and the opening specification of the feeding port is smaller than that of the partition plate (57) and is the same as that of the scraper (53).

3. The internal mixer for color change of plastic products according to claim 1, characterized in that: The outer wall of the scraper (53) is tightly attached to the inner wall of the feeding end seat (51), and the bottom end wall of the scraper (53) is an inclined structure.

4. The internal mixer for color change of plastic products according to claim 1, characterized in that: A feeding port is provided on the side wall of the feeding end seat (51), one of the feeding end seats (51) is used for feeding masterbatch, and the remaining feeding end seats (51) are used for feeding plastic.

5. The internal mixer for color change of plastic products according to claim 1, characterized in that: The auger blades (56) are heat-conducting structures, and the heaters (6) are equidistantly mounted on the auger blades (56).

6. The internal mixer for color change of plastic products according to claim 1, characterized in that: The inner cavity of the mixing chamber (2) is provided with a ramp (34) inclined towards the discharge port, and the ramp (34) has a built-in heating structure.

7. The internal mixer for color change of plastic products according to claim 1, characterized in that: The material taking mechanism comprises a material taker (71) arranged below the material discharge port of the mixing chamber (2), a push rod cylinder (73) being arranged on one side of the material taker (71), a movable push rod (74) being installed at the output end of the push rod cylinder (73), the other end of the push rod (74) being connected to an angle seat (75), and a leakage plate (76) for blocking the material taker (71) being connected to the angle seat (75).

8. The internal mixer for color change of plastic products according to claim 7, characterized in that: A discharge channel is combined between the discharge port of the mixing chamber (2) and the material extractor (71), and the discharge channel is separated by the leakage plate (76).

9. The internal mixer for color changing of plastic products according to claim 7, characterized in that: The push rod cylinder (73) is installed on the bottom of the platform (1) via a support (72) with an "L-shaped" structure.

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