Feeding device of injection molding machine
By designing the rotary pusher assembly and mixing propulsion vane group of the injection molding machine's feeding device, the problems of color powder addition control and uneven mixing were solved, achieving color uniformity and aesthetic appearance of the injection molded products.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-05
- Publication Date
- 2026-03-10
AI Technical Summary
Existing injection molding machines have difficulty controlling the amount of color powder added, and the mixing of plastic masterbatch and color powder is uneven, resulting in uneven color of injection molded products.
A feeding device for an injection molding machine was designed, comprising a plastic masterbatch feeding section, a colorant feeding section, a mixing channel, and a mixing chamber. Through the coordinated action of a rotating pusher assembly, a transfer rod, and a mixing propulsion vane assembly, the quantitative addition and uniform mixing of colorant are achieved.
It achieves accurate quantitative addition of color powder and uniform mixing of plastic masterbatch and color powder, ensuring high color uniformity and beautiful appearance of injection molded products.
Smart Images
Figure CN223982068U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of injection molding machine technology, and in particular relates to an injection molding machine feeding device. Background Technology
[0002] An injection molding machine is a convenient and efficient machine that heats and extrudes thermoplastic materials to form molded shapes. It allows for the one-piece molding of many complex and difficult-to-shape items. Simply apply high pressure to the molten plastic, causing it to be injected and fill the mold cavity. The injection molding machine heats the plastic, applies high pressure to the molten plastic, and then injects it to fill the mold cavity.
[0003] To make injection-molded parts easily distinguishable from other parts or to enhance their appearance, a certain amount of color powder needs to be added to the plastic masterbatch. However, the amount of color powder added cannot be too much, and it must be fully mixed with the plastic masterbatch to ensure the uniformity of color in the injection-molded parts. Summary of the Invention
[0004] The purpose of this invention is to provide an injection molding machine feeding device that allows for controllable addition of color powder and uniform mixing of plastic masterbatch and color powder.
[0005] The purpose of this utility model is to solve the following problem:
[0006] A feeding device for an injection molding machine includes a plastic masterbatch feeding section, a colorant feeding section, a mixing channel, a mixing chamber, and a first discharge port communicating with the mixing chamber. The colorant feeding section includes a feeding propulsion section and a quantitative feeding section. The feeding propulsion section includes a colorant storage chamber, a rotating pushing assembly driven by a first power in the colorant storage chamber, and a second discharge port on one side of the bottom of the colorant storage chamber. The quantitative feeding section includes a transferring rod driven by a second power in a transverse groove provided in the bottom wall of the colorant storage chamber. The transferring rod is provided with a third discharge port with an adjustable opening. The second discharge port is provided on the upper wall of one side of the transverse groove, and a fourth discharge port is provided on the lower wall of the other side of the transverse groove. A fifth discharge port corresponding to and communicating with the fourth discharge port is provided on the top wall of the mixing channel. A mixing propulsion vane assembly driven by a third power is provided in the mixing chamber. The actions of the first power, the second power, and the third power are controlled by a controller.
[0007] As a further optimization of the above technical solution, an annular groove is provided on the inner wall of the transverse groove on both sides of the area formed by the second to fourth discharge ports, and an annular sealing ring is provided in the annular groove.
[0008] As a further optimization of the above technical solution, the rotary pusher assembly includes a first power source disposed on the outer side of the bottom of the pigment storage cavity, the main shaft of the first power source extending into the pigment storage cavity, and two or more pusher rods fixed on the main shaft near the bottom of the pigment storage cavity.
[0009] As a further optimization of the above technical solution, the push rod is an L-shaped rod, the horizontal end of the L-shaped rod is fixed on the main shaft, the vertical part of the L-shaped rod is close to the side wall of the pigment storage cavity, and the L-shaped rod passes through the second discharge port when it rotates, so as to push the pigment into the second discharge port.
[0010] As a further optimization of the above technical solution, a pigment tank is installed on the upper part of the pigment storage cavity, and the lower part of the pigment tank is connected to the inner cavity of the pigment storage cavity.
[0011] As a further optimization of the above technical solution, a feed pipe is inclinedly provided on the opening on one side of the mixing channel, and the upper end of the feed pipe is provided with a flange to form the plastic masterbatch feed section.
[0012] As a further optimization of the above technical solution, a feed funnel is connected to the flange.
[0013] As a further optimization of the above technical solution, the lower opening of the mixing channel is connected to a mixing chamber that extends laterally to one side. The first discharge port is located on the lower wall of the mixing chamber away from the lower opening. The power shaft of the third power source located outside the mixing chamber extends into the mixing chamber, and the mixing propulsion vane assembly is located on the power shaft.
[0014] As a further optimization of the above technical solution, the mixing and propulsion vane group includes four or more blades axially spaced on the power shaft. Each blade is axially symmetrically arranged on the power shaft at each location to form a blade group, and adjacent blade groups are circumferentially staggered.
[0015] As a further optimization of the above technical solution, the blade has a baffle on one side of the strip plate, and one side of the flat plate is fixed to the power shaft. The baffles on both sides of the power shaft are all set on the side facing the direction of rotation.
[0016] The advantages of this invention compared to the prior art are:
[0017] 1. The present invention has a colorant feeding section that can be used in conjunction with the existing plastic masterbatch feeding section to feed colorant into the plastic masterbatch, so that the injection molded product has the required color.
[0018] 2. By setting up a feeding and feeding section and a quantitative feeding section, this utility model can ensure timely and accurate quantitative feeding of pigments.
[0019] 3. This utility model uses a mixing channel and a mixing propulsion vane assembly in the mixing chamber to mix and stir both sides of the plastic masterbatch and colorant, resulting in uniform mixing and injection-molded products with high color uniformity and beautiful appearance.
[0020] 4. This utility model uses a controller to control the actions of the first power, the second power, and the third power, which accurately controls the feeding amount and ensures uniform mixing, making it easier for the injection molding machine to produce qualified machine parts. Attached Figure Description
[0021] Figure 1 This is one of the three-dimensional schematic diagrams of this utility model.
[0022] Figure 2 This is the second three-dimensional schematic diagram of this utility model.
[0023] Figure 3 This is a cross-sectional view of the present invention.
[0024] Figure 4 This is a longitudinal sectional view of the present invention.
[0025] Figure 5 yes Figure 4 Enlarged view of part A.
[0026] Figure 6 This is a three-dimensional schematic diagram showing a partial structure of the pigment feeding section of this utility model. Detailed Implementation
[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figures 1-6 :
[0028] A feeding device for an injection molding machine includes a plastic masterbatch feeding section 30, a colorant feeding section 80, a mixing channel 40, a mixing chamber 50, and a first discharge port 60 communicating with the mixing chamber 50. The colorant feeding section 80 includes a feeding propulsion section and a metering feeding section 20. The feeding propulsion section includes a colorant storage chamber 88, a rotating pushing assembly driven by a first power 84 (e.g., a motor) within the colorant storage chamber 88, and a second discharge port 84 on one side of the bottom of the colorant storage chamber 88. The metering feeding section 20 includes a transfer rod 22 (e.g., a cylinder) driven by a second power 21 within a transverse groove 85 provided in the bottom wall 83 of the colorant storage chamber 88. The transfer rod 22 is provided with a third discharge port 23 with an adjustable opening. The size of the third discharge port 23 is adjusted by the threaded structure and the push-pull plate 24 connected by the threaded structure. The second discharge port 84 is set on the upper wall of one side of the transverse groove 85. The fourth discharge port 87 is set on the lower wall of the other side of the transverse groove 85. The top wall 41 of the mixing channel 40 is provided with a fifth discharge port 42 corresponding to and connected to the fourth discharge port 87. The mixing chamber 50 is provided with a mixing propulsion vane group driven by a third power 51 (e.g., a motor). The controller 70 controls the actions of the first power 84, the second power 21, and the third power 51. Of course, the power can be a motor, or a pneumatic motor, cylinder, or a turbine screw mechanism driven by an electric motor can be used to drive the rotation or movement of the components.
[0029] As a further optimization of the above technical solution, an annular groove is provided on the inner wall of the transverse groove 85 on both sides of the area formed by the second discharge port 84 to the fourth discharge port 87, and an annular sealing ring 86 is provided in the annular groove to prevent the leakage of pigment.
[0030] As a further optimization of the above technical solution, the rotary pusher assembly includes a first power 84 disposed on the outer side of the bottom of the colorant storage cavity 88, the main shaft of the first power 84 extending into the colorant storage cavity 88, and two or more pusher rods fixed on the main shaft near the bottom of the colorant storage cavity 88.
[0031] As a further optimization of the above technical solution, the push rod is an L-shaped rod. The end of the horizontal part 81 of the L-shaped rod is fixed on the main shaft, and the vertical part 82 of the L-shaped rod is close to the side wall of the pigment storage cavity 88. When the L-shaped rod rotates, it passes through the second discharge port 84 so as to push the pigment into the second discharge port 84.
[0032] As a further optimization of the above technical solution, a pigment tank 10 is installed on the upper part of the pigment storage cavity 88, and the lower part of the pigment tank 10 is connected to the inner cavity of the pigment storage cavity 88.
[0033] As a further optimization of the above technical solution, a feed pipe 31 is inclinedly provided on the opening on one side of the mixing channel 40, and the upper end of the feed pipe 31 is provided with a flange 32 to form the plastic masterbatch feed section 30.
[0034] As a further optimization of the above technical solution, a feed funnel is connected to the flange 32.
[0035] As a further optimization of the above technical solution, the lower opening of the mixing channel 40 is connected to a mixing chamber 50 that extends laterally to one side. The first discharge port 60 is located on the lower wall of the mixing chamber 50 away from the lower opening. The power shaft of the third power 51 located outside the mixing chamber 50 extends into the mixing chamber 50. The mixing propulsion vane assembly is located on the power shaft 51.
[0036] As a further optimization of the above technical solution, the mixing and propulsion vane group includes four or more blades 52 axially spaced on the power shaft. Each blade 52 is axially symmetrically arranged on the power shaft 51 at each location to form a blade group, and adjacent blade groups are circumferentially staggered.
[0037] As a further optimization of the above technical solution, the blade 52 is provided with a baffle 54 on one side of the strip plate 53, and one side of the flat plate 53 is fixed on the power shaft 51. The baffles on both sides of the power shaft 51 are provided on the side facing the direction of rotation.
[0038] The working principle of this utility model is as follows: The opening size of the third discharge port 23 on the transfer rod 22 is adjusted by the threaded structure. The controller controls the second power 21 to drive the transfer rod 22 to move back and forth. The third discharge port 23 receives the color material each time it passes the second discharge port 84. When it moves to the fourth discharge port 87 and the fifth discharge port 42, the color material enters the mixing channel 40 and the mixing chamber 50 in sequence. The plastic masterbatch entering from the plastic masterbatch feeding section 30 enters the mixing channel 40 and the mixing chamber 50 in sequence. The third power 51 (e.g., a motor) drives the mixing propulsion vane group to rotate to mix and propel the plastic masterbatch and color material. Then, it enters the feeding heating section of the injection molding machine from the first discharge port 60 and is then injection molded into the required product.
[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that simple substitutions or modifications can still be made to the technical solutions or technical features described in the foregoing embodiments, and these simple substitutions or modifications do not cause the essence of the corresponding technical solutions to deviate from the spirit and substance of the technical solutions of the embodiments of this utility model, and are still within the protection scope of this utility model.
Claims
1. An injection molding machine feed apparatus characterized by: The application relates to a plastic master batch feeding device, which comprises a plastic master batch feeding part, a colorant feeding part, a mixing channel, a mixing cavity and a first discharge port communicated with the mixing cavity.
2. An injection molding machine feed apparatus as defined in claim 1, wherein: The second discharge port to the fourth discharge port forms a region with a lateral groove on the inner wall of the region, and a ring-shaped groove is arranged in the ring-shaped groove.
3. An injection molding machine feed apparatus as defined in claim 1, wherein: The rotating pushing assembly comprises the first power arranged on the outside of the bottom of the colorant storage cavity, a main shaft of the first power extending into the colorant storage cavity and two or more pushing rods fixed on the main shaft close to the bottom in the colorant storage cavity.
4. An injection molding machine feed apparatus as defined in claim 3 wherein: The pushing rod is an L-shaped rod, the end of the horizontal part of the L-shaped rod is fixed on the main shaft, the vertical part of the L-shaped rod is close to the side wall of the colorant storage cavity, and the L-shaped rod passes through the second discharge port when rotating so as to push the colorant into the second discharge port.
5. An injection molding machine feed apparatus as defined in claim 1, wherein: A colorant tank is arranged on the upper part of the colorant storage cavity, and the lower part of the colorant tank is communicated with the inner cavity of the colorant storage cavity.
6. An injection molding machine feed apparatus as defined in claim 1, wherein: An inlet pipe is arranged on the opening of one side of the mixing channel in a slanting mode, the upper end of the inlet pipe is provided with a flange plate connected to form the plastic master batch feeding part.
7. An injection molding machine feed apparatus as defined in claim 6 wherein: The flange plate is connected with an inlet funnel.
8. An injection molding machine feed apparatus as defined in claim 1, wherein: A mixing cavity extending to one side in a horizontal mode is communicated with the lower opening of the mixing channel, the first discharge port is arranged on the lower wall of the mixing cavity away from the lower opening, a power shaft of the third power arranged outside the mixing cavity extends into the mixing cavity, and the mixing pushing vane group is arranged on the power shaft.
9. An injection molding machine feed apparatus as defined in claim 8 wherein: The mixing pushing vane group comprises four or more blades arranged on the power shaft in an axial direction, each blade is arranged on the power shaft in an axial symmetry mode to form a blade group, and two adjacent blade groups are arranged in a circumferential direction in a staggered mode.
10. An injection molding machine feed apparatus as defined in claim 9, wherein: The blade is provided with a baffle on one side of a strip-shaped plate, one side of the strip-shaped plate is fixed on the power shaft, and the baffles on the two sides of the power shaft are arranged on the side facing the rotating direction.