Mixing component and injection molding machine with same

Abstract

The utility model belongs to the technical field of injection molding, and relates to a mixing component and an injection molding machine with the same. The mixing component comprises a mixing barrel body and a mixing and shunting inner barrel; a melting runner is arranged in the mixing barrel body in the axial direction, one end of the mixing runner is a feeding end, and the other end of the mixing runner is a discharging end; the mixing and shunting inner barrel is arranged on the inner wall of the melting runner; wherein the inner surface of the mixing and shunting inner cylinder is provided with net-shaped columns which are stacked and arranged along the axial direction. The mixing and shunting inner barrel designed by the utility model aims to increase the flow activity of molten plastic, so that the plastic is mixed more uniformly, and the mixing effect is enhanced; the net-shaped columns designed in the mixing and shunting inner barrel can shear the materials, the materials are layered through the net-shaped columns, and the speed difference between vortex and fluid is treated, so that the overall homogenization can be realized. When the mixing component disclosed by the utility model is used for mixing a material with a certain solid-phase material, a better effect can be exerted, and the color mixing and plasticizing effects of the material are more excellent.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding technical field, especially a kind of mixing component and injection molding machine with it. BACKGROUND

[0002] In the injection molding production process, material (raw material and color master batch) is entered into injection molding machine from feeding port, is transferred via melt runner, material gradually melts under the action of friction heat generated by screw rotation and heat provided by external heating ring, is further mixed and plasticized via metering section of melt runner and is accumulated in screw head, finally is rapidly injected into mold cavity from nozzle head.In this process, if plasticization is abnormal, it will cause appearance problems on product surface, resulting in product appearance quality unqualified and other abnormalities.

[0003] In the prior art, the reasons leading to abnormal plasticization mainly include poor material flow activity and uneven mixing. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of mixing component and injection molding machine with it, to solve the problems of poor mixing flow activity and uneven mixing in the existing material mixing technology.

[0005] To solve the above technical problems, the utility model aims at realizing by the following technical scheme: provide a kind of mixing component, including:

[0006] Mixing barrel body, melt runner is provided in the inside along the axial direction, one end of the melt runner is feeding end, and the other end is discharge end;

[0007] Mixing shunt inner cylinder is set on the inner wall of melt runner;

[0008] Wherein, the inner surface of the mixing shunt inner cylinder is provided with mesh column arranged along the axial direction in layers, and the mesh column is used for shearing material when material flows through the melt runner.

[0009] Further, the mesh shape of the mesh column is polygon.

[0010] Further, the mesh shape of the mesh column is diamond.

[0011] Further, the angle range of diamond inner angle of the diamond towards the melt runner direction is 30°-100.

[0012] Further, the mixing barrel body includes rear axle seat, sleeve and nozzle head connected in sequence, and the mixing shunt inner cylinder is set on the inner wall of the sleeve.

[0013] Further, the rear axle seat, sleeve and nozzle head are threadedly sleeved and fixed.

[0014] Furthermore, the melting channel includes a feeding section, a conveying section, a compression section, and a metering section connected in sequence, and the mixing and diverting inner cylinder is located in the compression section.

[0015] Furthermore, the mixing component also includes a screw disposed in the melt flow channel, the screw groove of which is used to drive the material along the melt flow channel when the screw rotates.

[0016] Furthermore, the compression ratio of the screw ranges from 2.1 to 2.3.

[0017] This utility model embodiment also provides an injection molding machine, including the mixing component described above.

[0018] Compared with the prior art, the end cap structure of this utility model has at least the following beneficial effects:

[0019] The mixing and diversion inner cylinder is designed to increase the flow activity of molten plastic, making the mixing more uniform and enhancing its mixing effect. The mesh columns designed inside the mixing and diversion inner cylinder can shear the material. The material passes through the mesh columns and undergoes stratification, eddy current, and velocity difference processing between fluids, which can achieve overall homogenization.

[0020] When the mixing component of this utility model is used to mix materials with a certain solid phase, it can achieve better results, resulting in better color mixing and plasticizing effects.

[0021] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A three-dimensional structural diagram of the mixing component provided in an embodiment of this utility model.

[0024] Figure 2 A schematic diagram of the planar structure of the mixing component provided in an embodiment of this utility model.

[0025] Figure 3 This is a first-explosion-view structural schematic diagram of the compounding component provided in an embodiment of the present utility model.

[0026] Figure 4 This is a structural schematic diagram of the compounding component provided in an embodiment of the present invention from a second explosion perspective.

[0027] Figure 5 Provided for the embodiments of this utility model Figure 2 A three-dimensional view of the mid-section AA.

[0028] Figure 6 Provided for the embodiments of this utility model Figure 2 A schematic diagram of the planar view of the mid-section AA.

[0029] Figure 7 This is a schematic diagram of the screw structure provided in an embodiment of the present utility model.

[0030] Figure 8 A color difference comparison chart between the present invention and the prior art, provided for embodiments of the present invention.

[0031] Figure 9 A comparison chart of the gloss levels of the present invention and the prior art, provided for embodiments of the present invention.

[0032] Explanation of the markings in the image:

[0033] 1. Rear axle seat; 2. Sleeve; 3. Nozzle head; 4. Mixing and diverting inner cylinder; 41. Mesh column; 5. Melting channel; 6. Screw. Detailed Implementation

[0034] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0035] In the description of this utility model, it should be clarified that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "back," "left," "right," "up," "down," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this utility model.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Please see Figures 1 to 7 This utility model embodiment provides a mixing component, including:

[0038] The mixing cylinder body has a melting channel 5 arranged axially inside, with one end of the melting channel being the feed end and the other end being the discharge end;

[0039] The mixing and diversion inner cylinder 4 is set on the inner wall of the melting flow channel 5;

[0040] The inner surface of the mixing and diversion inner cylinder 4 is provided with a mesh column 41 arranged in layers along the axial direction. The mesh column 41 is used to shear the material when it flows through the melting channel.

[0041] In this embodiment, the mixing cylinder body is a long cylindrical structure. The melting channel 5 is arranged along the axial direction of the long strip of the mixing cylinder body. The material enters the melting channel 5 from the feed end. After being rotated and transported by the screw 6, it can move forward along the melting channel 5. When passing through the mixing and diverting inner cylinder 4, it can be sheared by the mesh column 41. Under the action of frictional heat generated by shearing and heat provided by external heating elements, it gradually melts. The melted material reaches the discharge end and can be injected into the mold cavity of the next stage.

[0042] In this embodiment, the mixing and diversion inner cylinder 4 is designed to increase the flow activity of the molten plastic, making the mixing more uniform and enhancing its mixing effect. The mesh columns 41 designed inside the mixing and diversion inner cylinder 4 can shear the material. The material passes through the mesh columns 41 to undergo stratification, eddy currents, and velocity difference processing between fluids, which can achieve overall homogenization.

[0043] In this embodiment, when the mixing component of this utility model is used to mix materials with a certain solid phase, it can achieve better results, making the color mixing and plasticizing effects of the materials more excellent.

[0044] In one embodiment, the mesh shape of the mesh post 41 is polygonal.

[0045] In this embodiment, the polygonal mesh design of the mesh columns 41 helps improve the shearing efficiency of the material while reducing pressure loss during the mixing process. Furthermore, the arrangement and spacing of the mesh columns 41 can be adjusted according to the characteristics of different materials to achieve better mixing results.

[0046] In one embodiment, the mesh shape of the mesh column 41 is rhomboid; the interior angle of the rhomboid facing the melt flow channel 5 is less than or equal to 100°.

[0047] In this embodiment, to further improve the shearing effect, the mesh shape of these mesh columns 41 is designed as rhombus. In particular, the inner angles of these rhombus meshes facing the melt flow channel 5 are designed to be less than 90 degrees. This design can further optimize the shearing and mixing effect of different materials, thereby improving the quality of the final product.

[0048] Specifically, the preferred angle range for the interior angle of the rhombus is 30° to 100°. Within this preferred range, the larger the interior angle of the rhombus, the longer the shearing time for the material, and the smaller the interior angle of the rhombus, the shorter the shearing time for the material. Thus, the larger the proportion of solid material in the material, the longer the shearing time is required for better mixing, and therefore the larger the interior angle of the rhombus should be. Conversely, the smaller the proportion of solid material in the material, the smaller the interior angle of the rhombus should be.

[0049] In one embodiment, the mixing cylinder body includes a rear shaft seat 1, a sleeve 2 and a nozzle head 3 connected in sequence, and a mixing diversion inner cylinder 4 is disposed on the inner wall of the sleeve 2.

[0050] In this embodiment, the rear axle seat 1, sleeve 2, and nozzle head 3 are all hollow along the axial direction to form a melt flow channel after connection. The rear axle seat 1 serves as the support point for the entire mixing cylinder body, ensuring its stability and durability. Immediately following the rear axle seat 1 is the sleeve 2, which not only provides the necessary structural strength for the mixing cylinder body but also features a crucial component on its inner wall—the mixing diversion inner cylinder 4. The design of the mixing diversion inner cylinder 4 cleverly utilizes the inner wall space of the sleeve 2, and through its unique structure, it can effectively divert and mix materials, thereby improving mixing efficiency and quality. The nozzle head 3 is located at the end of the mixing cylinder body; it is responsible for discharging the mixed material in an appropriate manner, ensuring the uniformity and consistency of the material. The design of the entire mixing cylinder body considers material flowability and ease of operation, making the entire mixing process more efficient and precise.

[0051] like Figure 3 and Figure 4 In one embodiment, the rear axle seat 1, sleeve 2 and nozzle head 3 are fixed by threaded connection.

[0052] In this embodiment, in order to ensure the stability and durability of the rear axle seat 1, sleeve 2 and nozzle head 3, the rear axle seat 1, sleeve 2 and nozzle head 3 are fixed by threaded connection. This connection method is simple and reliable and can withstand various pressures and wear during the mixing process.

[0053] likeFigure 6 As shown, in one embodiment, the melt flow channel 5 includes a feeding section a, a feeding section b, a compression section c, and a metering section d connected in sequence, and the mixing and diverting inner cylinder 4 is located in the compression section.

[0054] In this embodiment, the melt flow channel 5 is designed to be divided into a feeding section, a conveying section, a compression section, and a metering section connected in sequence. These parts together constitute the entire flow channel system. Of particular note is the mixing and diversion inner cylinder 4, which is cleverly placed in the compression section. This layout plays a crucial role in the uniform mixing of materials and the stable transmission of pressure.

[0055] In one embodiment, the mixing component further includes a screw 6 disposed in the melt flow channel 5, the screw groove of the screw 6 being used to drive the material along the melt flow channel 5 when the screw 6 rotates.

[0056] In this embodiment, the mixing component further includes a screw 6 disposed within the melt flow channel 5, the screw 6 having screw grooves. When the screw 6 rotates within the melt flow channel 5, the screw grooves can effectively drive the material along the melt flow channel 5, thereby ensuring uniform mixing and conveying of the material during the mixing process.

[0057] Furthermore, the rotational power of screw 6 is provided by a motor through a transmission device, ensuring stable rotation and precise control of screw 6. In addition, the screw groove design of screw 6 has specific depths and angles to accommodate the characteristics of different materials, thereby optimizing the mixing effect. At the end of screw 6, a check valve is usually installed to prevent material backflow when screw 6 stops rotating. The entire mixing component is designed to improve the production efficiency and product quality of the injection molding machine while reducing energy consumption and maintenance costs.

[0058] like Figure 7 As shown, in one embodiment, the compression ratio of the screw 6 ranges from 2.1 to 2.3.

[0059] In this embodiment, the compression ratio refers to the ratio of the volume of the first screw groove (located in the feeding section) to the volume of the last screw groove (located in the metering section) of the screw 6. The screw grooves in the feeding section are deeper, while those in the metering section are shallower. The value of the compression ratio affects the temperature change in the compression section. A higher temperature change in the compression section will affect the mixing effect. Therefore, based on the mixing and diversion inner cylinder 4 of this utility model, it is necessary to specifically optimize the compression ratio of the screw 6.

[0060] Specifically, in the application of the mixing component of this utility model, an in-depth follow-up analysis was conducted on the machine exhibiting abnormally high temperatures in the compression section. The results showed that the main reason for the temperature rise in the compression section was the difficulty in dissipating the large amount of heat generated by the screw 6 during high-speed operation in this area, leading to abnormalities in the production process. Further analysis indicated that the root cause of the problem was the excessively high compression ratio of the currently used screw 6. After replacing the screw 6 and adjusting the compression ratio, further analysis was performed. Ultimately, it was determined that when the compression ratio was within the range of 2.1 to 2.3, the temperature of the compression section could be maintained at a normal level. For details, please refer to [reference needed]. Figure 7 In the example screw 6, the volume of the first screw groove is f, and the volume of the last screw groove is e. When the ratio of f / e is 2.1 to 2.3, the temperature of the compression section can be maintained at a normal level. Preferably, in a more specific embodiment, the ratio of f / e is set to 2.2.

[0061] More specifically, besides the compression ratio design of the screw 6, the selection of the screw 6 also has a significant impact on the plasticizing capacity. Based on the mixing and diversion inner cylinder 4 of this invention, this invention analyzes the plasticizing capacity of screws 6 with different structures paired with the mixing and diversion inner cylinder 4. The results show that the high-combining screw > double-diamond screw > H-type screw. In actual production, the screw 6 with stronger plasticizing capacity exhibits a particularly significant color mixing effect. Therefore, researching solutions to shear heat while simultaneously satisfying mixing effects is a key research direction. Through shear heat analysis of screws 6 with different structures, it was found that the high-combining screw has a 15% higher shear heat than the H-type screw and an 8.7% higher shear heat than the double-diamond screw. Therefore, selecting a high-combining screw to pair with the mixing and diversion inner cylinder 4 of this invention can achieve a better mixing effect.

[0062] This utility model compares and verifies the mixing component of this utility model with existing technologies. Specifically, production verification and comparison are conducted using the same processing parameters. Under the same production conditions of machine tools, molds, and auxiliary equipment, the color difference value and surface finish of the mixing component using existing technologies and the mixing component of this utility model are compared and verified respectively. The verification results are as follows: Figure 8 and Figure 9 As shown, the color difference value and smoothness obtained by using the compounding component of this utility model are improved.

[0063] Furthermore, based on the mixing components of this invention, the product's color and light transmittance are improved, while the sol back pressure can be reduced and the sol-sol speed can be increased, thereby improving the efficiency of the sol-sol process. A detailed analysis follows:

[0064] 1. Verify the injection molding machine that frequently produces color-patterned panels, and analyze it using a specific product as an example:

[0065] Assuming the screw temperature is 180-210-215-220-225-225℃, the injection speed is 85-95-80-35-20-10%, the injection pressure is 120-135-135-85-65-35 bar, the melt back pressure is 12-12-12-12 bar, and the melt pressure is 100 bar, the color difference and gloss of the compounded components obtained by the prior art are shown in Table 1 below:

[0066] Table 1

[0067] 1 2 3 4 5 6 7 8 9 10 Δb -0.66 -0.63 -0.64 -0.66 -0.63 -0.65 -0.67 -0.65 -0.67 -0.65 ΔE 0.78 0.73 0.72 0.73 0.64 0.74 0.76 0.74 0.75 0.74 Gloss 100 100 103 104 104 102 100 103 104 103

[0068] Under the following conditions: screw 6 temperature is 180-210-215-220-220-225℃, injection speed is 75-85-70-45-20-10%, injection pressure is 125-125-130-115-80-50 bar, melt back pressure is 9-9-9-9 bar, and melt pressure is 85 bar. The color difference and gloss of the compounded component obtained by this invention are shown in Table 2 below.

[0069] Table 2

[0070] 1 2 3 4 5 6 7 8 9 10 Δb -0.48 -0.47 -0.45 -0.44 -0.50 -0.51 -0.48 -0.47 -0.46 -0.50 ΔE 0.69 0.71 0.70 0.68 0.69 0.69 0.66 0.61 0.63 0.66 Gloss 111 112 111 111 110 114 111 110 112 110

[0071] Comparing the data in Tables 1 and 2, it can be seen that the compounded components of this invention exhibit better color difference and gloss under lower sol pressure conditions.

[0072] This utility model embodiment also provides an injection molding machine, including the mixing component described above.

[0073] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous technical features can be freely combined and superimposed.

[0074] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A compound component, characterized in that, include: The mixing cylinder body has a melting channel arranged along the axial direction inside, with one end of the melting channel being the feed end and the other end being the discharge end; A mixing and diversion inner cylinder is disposed on the inner wall of the melting flow channel; The inner surface of the mixing and diversion inner cylinder is provided with a mesh column arranged in layers along the axial direction. The mesh column is used to shear the material when it flows through the melting channel.

2. The compounding component according to claim 1, characterized in that, The mesh shape of the mesh column is polygonal.

3. The compounding component according to claim 1 or 2, characterized in that, The mesh shape of the mesh column is rhomboid.

4. The compounding component according to claim 3, characterized in that, The angle range of the interior angle of the rhombus facing the direction of the melt flow channel is 30° to 100°.

5. The compounding component according to claim 1, characterized in that, The mixing cylinder body includes a rear axle seat, a sleeve, and a nozzle head connected in sequence, and the mixing diversion inner cylinder is disposed on the inner wall of the sleeve.

6. The compounding component according to claim 5, characterized in that, The rear axle seat, sleeve, and nozzle are fixed together by a threaded connection.

7. The compounding component according to claim 1, characterized in that, The melting channel includes a feeding section, a conveying section, a compression section and a metering section connected in sequence, and the mixing and diverting inner cylinder is located in the compression section.

8. The compounding component according to claim 1, characterized in that, It also includes a screw disposed in the melt flow channel, the screw groove of which is used to drive the material along the melt flow channel when the screw rotates.

9. The compounding component according to claim 8, characterized in that, The compression ratio of the screw ranges from 2.1 to 2.

3.

10. An injection molding machine, characterized in that, Includes the compounding components as described in any one of claims 1 to 9.

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