Color matching device for injection molding

Abstract

The utility model discloses a color matching device for injection molding. The device comprises a machine body, a mounting bin, a feeding device, a powder feeding device, a mixing pot and a stirring assembly. The installation bin is located in the machine body, and the feeding device and the powder feeding device are installed on the machine body and located above the installation bin. The feeding device adopts constant-volume type feeding, and the toner feeding device adopts constant-weight type feeding, so that accurate matching of materials and toner is ensured. The mixing pot is detachably mounted in the mounting bin, and the stirring assembly is arranged in the mixing pot and is driven by the driving assembly mounted on the machine body to work. The device solves the problems of non-uniform toner adhesion, low color matching precision, inconvenience in cleaning and the like in the prior art by optimizing a stirring structure and improving feeding and discharging modes, and is suitable for a color matching process of plastic products in injection molding production.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic processing, in particular to a color matching device for injection molding process, especially a color matching device capable of efficiently and uniformly mixing plastic particles and color powder. BACKGROUND

[0002] In the color matching process of plastic particles, the existing technology mainly adopts a rolling stirring structure, such as the devices described in patents ZL202410837076.3 and ZL202320074246.8. These devices achieve the mixing of plastic particles and color powder through the rotation of stirring rods around a horizontal axis. However, this stirring method has many deficiencies in practical application, which not only affects the effect of color matching, but also increases the complexity and cost of production.

[0003] Firstly, there is a fundamental problem in the design of the rolling stirring structure: due to the large weight of plastic particles and the small density and light texture of color powder, the color powder is easily lifted by the rotating action of the stirring rods during the stirring process. This lifting phenomenon causes the color powder to not be uniformly and firmly attached to the surface of the plastic particles.

[0004] Specifically, the rotation of the stirring rods causes the color powder to form a suspended state in the stirring bin, while the plastic particles are deposited at the bottom of the stirring bin due to the action of gravity. This stratification phenomenon reduces the contact area between the color powder and the plastic particles, causing the color powder to be attached to the surface of the particles in a loose manner with weak bonding force. In actual production, this uneven attachment can cause color differences in the final product, and even cause color powder to fall off in some areas, seriously affecting the appearance quality of the product.

[0005] Secondly, another significant problem of the rolling stirring structure is the waste of color powder and the inaccuracy of color matching. Due to the easy lifting of color powder during stirring, part of the color powder will be attached to the inner wall of the stirring bin, especially at the top and side walls of the stirring bin. This attachment phenomenon not only reduces the amount of color powder actually involved in the mixing, but also makes it difficult to control the accuracy of color matching. For example, during the stirring process, the operator needs to add a certain amount of color powder according to the formula, but due to the loss of color powder, the actual amount of color powder involved in the mixing may be much lower than the expected value. In order to achieve the target color, the operator often needs to add color powder multiple times, which not only increases the amount of color powder, but also may cause deviation in color matching, affecting the consistency of the product. In addition, the color powder attached to the inner wall of the stirring bin may fall off and mix into other batches of materials in subsequent production, causing cross-contamination and further affecting the accuracy of color matching.

[0006] In addition, the existing mixing bin also has obvious deficiencies in cleaning. Although the patent ZL202320074246.8 adopts an inner lining structure to facilitate material replacement and cleaning, there are still some problems in the design that are difficult to overcome. For example, there are gaps between the side opening bin door of the mixing bin and the main body of the mixing bin, which are easy to accumulate a mixture of toner and plastic particles during the mixing process. Even if the bin door can be completely sealed, toner and particles may still remain in the corners and edges of the mixing bin, as well as the gap between the stirring rod and the bin wall. These residues not only are difficult to completely remove, but also can mix with new materials in subsequent production, affecting the accuracy of color matching and the consistency of products. In addition, the process of cleaning the mixing bin usually requires manual operation, which is time-consuming and labor-intensive, and the cleaning effect is difficult to guarantee, which further increases the complexity and cost of production.

[0007] In summary, the existing rolling type mixing structure has significant deficiencies in toner adhesion uniformity, color matching accuracy, and cleaning convenience. The root of these problems lies in the design of the mixing structure, which fails to fully consider the differences in physical properties between toner and plastic particles, as well as the sealing and cleaning of the mixing bin. Therefore, it is of great significance and value to develop a new type of color matching device. Utility model content

[0008] The purpose of the present application is to at least overcome one deficiency of the prior art, provide a color matching device for injection molding, which solves the problems of uneven toner adhesion, low color matching accuracy and inconvenient cleaning in the prior art by optimizing the mixing structure and improving the feeding and discharging methods, and is suitable for the color matching process of plastic products in injection molding production.

[0009] To achieve the above-mentioned purpose, the present application discloses a color matching device for injection molding, which comprises a machine body, a mounting bin, a feeding device, a toner feeding device, a mixing kettle and a stirring assembly.

[0010] The mounting bin is located in the machine body, and the feeding device and the toner feeding device are respectively installed on the machine body and located above the mounting bin;

[0011] The feeding device adopts a constant volume feeding, and the toner feeding device adopts a constant weight feeding to ensure the accurate proportioning of materials and toner.

[0012] In particular, the feeding device and the toner feeding device can be multiple to achieve mixed feeding.

[0013] The mixing kettle is detachably installed in the mounting bin, the stirring assembly is arranged in the mixing kettle, and the stirring assembly is driven to work by the driving assembly installed on the machine body.

[0014] The mounting bin is provided with a sealable sealing door, which is closed and sealed by electromagnetic attraction or mechanical fixation to prevent dust from escaping and ensure the cleanliness and safety of the working environment.

[0015] Specifically, the sealing door of the installation bin is fixed by electromagnetic force or mechanical force, which can be quickly opened and closed to improve production efficiency. The contact surface between the sealing door and the installation bin is provided with a sealing strip to further enhance the sealing effect and prevent dust from escaping.

[0016] The installation bin is provided with a discharge port communicated with the feeding device and a powder outlet communicated with the powder feeding device.

[0017] Further, the mixing pot includes a cover and a pot body, and the cover is provided with a feeding port and a powder inlet which are respectively matched with the discharge port and the powder outlet.

[0018] The stirring assembly includes a stirring rod composed of a shaft and stirring blades connected to the shaft, forming an anchor type stirring rod structure. The shaft is rotatably connected to the cover through a bearing and is axially constrained on the cover.

[0019] Specifically, the stirring blades are at least two, preferably three, arranged around the axis of the shaft. The stirring blades are L-shaped as a whole, including a horizontal section and a vertical section. One end of the horizontal section is connected to the shaft, and the other end extends upward to form the vertical section. The horizontal section is inclined in the horizontal direction to form a first inclined surface, and the vertical section near the top is inclined in the opposite direction to the horizontal section to form a second inclined surface. During stirring, the first inclined surface and the second inclined surface push and crush the toner and plastic particles to fully mix them and firmly attach the toner to the surface of the particles. This structure effectively improves the bonding strength of the toner and the particles, ensuring uniformity and accuracy of color matching.

[0020] Further, the upper end of the shaft extends out of the cover and is provided with a protruding pin, and the output shaft of the driving assembly is connected to the protruding pin through a slot joint to realize the rotary drive of the stirring rod.

[0021] Further, the bottom of the pot body is a flat structure to ensure uniform distribution of the material during stirring and avoid local accumulation.

[0022] Further, the inner wall of the pot body is provided with a bent arc structure which is adapted to the shape of the stirring blades to optimize the flow path of the material and toner and improve the mixing efficiency.

[0023] Further, the bottom of the pot body is provided with an opening which cooperates with the opening and closing mechanism in the installation bin to control the opening and closing of the opening to realize the discharging operation of the mixing pot.

[0024] Further, the opening and closing mechanism adopts a telescopic structure, including a valve plate and a driving mechanism for driving the valve plate to move horizontally. The valve plate is opened and closed by the linear motion of the driving mechanism.

[0025] Further, the machine body is provided with a discharge bin below the mounting bin, and the opening of the mixing pot is communicated with the discharge bin through an opening and closing mechanism to control the communication state, so that the mixture is discharged after the stirring is completed. The bottom of the discharge bin is provided with a discharge port. In addition, the outer side of the discharge bin is provided with an observation window, so that the operator can monitor the discharging process in real time.

[0026] Further, the cover is provided with a guide plate, and the top of the mounting bin is provided with a guide groove matched with the guide plate, so as to ensure the accurate positioning and stable installation of the mixing pot in the mounting bin.

[0027] Further, the cover is provided with a guide plate, and the top of the mounting bin is provided with a guide groove matched with the guide plate, so as to ensure the accurate positioning and stable installation of the mixing pot in the mounting bin.

[0028] Further, the drive assembly includes a motor connected and driven by a reducer or a belt and a slot joint. The rotating speed of the motor can be adjusted according to actual needs to adapt to the mixing requirements of different materials and toner.

[0029] Further, the pot body and the cover of the mixing pot are made of high-strength wear-resistant materials to prolong the service life and reduce the maintenance cost. The inner surface of the pot body is polished to reduce the adhesion of materials and toner and facilitate cleaning. In addition, the cooperation between the bottom opening of the pot body and the opening and closing mechanism is precisely machined to ensure the sealing performance of the opening and the flexibility of the opening and closing, and to avoid material leakage or jamming.

[0030] Further, the drive mechanism of the opening and closing mechanism adopts a pneumatic cylinder or an electric push rod to realize the horizontal expansion and contraction movement of the valve plate. The edge of the valve plate is provided with a sealing gasket to ensure the close fit with the bottom opening of the pot body in the closed state and prevent material leakage.

[0031] Through the above structural design, the color matching device for injection molding provided by the present application can realize efficient and uniform mixing of materials and toner, and has the advantages of convenient cleaning, good sealing performance, flexible operation, etc., and can meet the high requirements of modern injection molding production on color matching precision and efficiency.

[0032] The above-listed beneficial effects are not exhaustive of all advantages. Other potential beneficial effects and detailed technical implementation methods will be further disclosed in the embodiments or other description parts of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0033] The specific embodiments will be better understood after reading the following detailed description in conjunction with the accompanying drawings, in which the positions, sizes, and ranges of the structures shown in the drawings are sometimes not actual positions, sizes, and ranges. In the drawings:

[0034] Figure 1is a structural schematic diagram of one embodiment disclosed by the present application.

[0035] Figure 2 is a structural schematic diagram of one embodiment disclosed by the present application in a stereoscopic view.

[0036] Figure 3 is a structural exploded view of the mixing kettle and the stirring assembly in the assembled state of one embodiment disclosed by the present application. In the figure, the respective reference numerals are: 1 - machine body, 2 - mounting bin, 3 - feeding device, 4 - powder feeding device, 5 - mixing kettle, 6 - stirring assembly, 7 - driving assembly, 8 - opening and closing mechanism, 9 - discharging bin, 10 - guide groove, 501 - cover, 502 - kettle body, 503 - feeding port, 504 - powder feeding port, 505 - guide plate, 601 - shaft, 602 - stirring blade, 603 - protruding pin, 701 - slot joint, 6001 - horizontal section, 6002 - vertical section, 6003 - first inclined surface, 6004 - second inclined surface. DETAILED DESCRIPTION

[0037] The present disclosure will be described with reference to the accompanying drawings, which show several embodiments of the present disclosure. It should be understood, however, that the present disclosure can be presented in many different forms and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and to fully inform those skilled in the art of the scope of protection of the present disclosure. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0038] It should be understood that, in all the drawings, the same reference numerals represent the same elements. In the drawings, the dimensions of certain features can be distorted for the sake of clarity.

[0039] It should be understood that the language used in the specification is only used to describe specific embodiments and is not intended to limit the present disclosure. Unless otherwise defined, all terms (including technical and scientific terms) used in the specification have the meanings commonly understood by those skilled in the art. For the sake of brevity and / or clarity, known techniques, methods, and equipment known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the authorized description when appropriate.

[0040] The singular forms "a", "said" and "the" used in the specification, unless clearly indicated otherwise, include plural forms. The language "includes", "comprises" and "contains" used in the specification means the existence of the claimed feature, but does not exclude the existence of one or more other features. The language "and / or" used in the specification includes any and all combinations of one or more of the related listed items.

[0041] To better understand the structure and function of the present embodiment, reference will be made to the accompanying drawings, in which:Figure 1 To the attached Figure 3 The embodiment is described. The embodiment discloses an exemplary structure of a color matching device for injection molding, which comprises a body 1, a mounting bin 2, a feeding device 3, a powder feeding device 4, a mixing kettle 5, and a stirring assembly 6.

[0042] As shown in the attached Figure 1 The body 1 is the main frame of the entire device, which is welded by high-strength steel. In general, the surface is treated to prevent rust to ensure its structural strength and durability.

[0043] In use, the body 1 is directly or through a support installed at the feeding port of the injection molding machine.

[0044] The feeding device 3 and the powder feeding device 4 are fixedly installed on the body 1, and the internal passage is provided to cooperate with the feeding device 3 and the powder feeding device 4.

[0045] The mounting bin 2 is located in the body 1, which is used to accommodate the mixing kettle 5 and ensure its stable operation. The top of the mounting bin 2 is provided with a discharge port and a powder outlet, and the discharge port and the powder outlet are respectively connected and conducted with the feeding device 3 and the powder feeding device 4 through the passage in the body 1.

[0046] As shown in the attached Figure 1 The sealing door (not shown in the figure) of the mounting bin 2 is closed and sealed by electromagnetic fixation or mechanical fixation.

[0047] The specific structure of the sealing door includes a door body and a sealing strip. The door body is made of high-strength aluminum alloy, which is polished on one side to cooperate with the mounting bin 2, so that it is easier to clean.

[0048] The sealing strip is made of silicone material with high temperature resistance and wear resistance, and its cross-sectional shape is U-shaped to ensure close contact with the contact surface of the body 1, so as to seal the mounting bin 2.

[0049] The sealing door is locked after closing by electromagnetic fixation device or mechanical locking device. The electromagnetic fixation device includes electromagnet and suction cup, and the mechanical locking device includes handle and locking bolt. The specific design of the electromagnetic fixation device and the mechanical locking device belongs to the known technology of those skilled in the art, which will not be described in detail here.

[0050] The feeding device 3 and the powder feeding device 4 are respectively installed on the body 1 and located above the mounting bin 2. The feeding device 3 adopts a constant volume feeding, and its core component is a constant volume bin to realize accurate feeding of plastic particles.

[0051] The powder feeding device 4 adopts a constant weight feeding, and its core component is a skip with an electronic weighing sensor. The accuracy of the electronic weighing sensor is ±0.1g, and the material of the skip is wear-resistant alloy steel, which is surface hardened to improve its service life. The skip can measure the weight of toner in the skip.

[0052] The specific control logic and circuit design of the feeding device 3 and the powder feeding device 4 are well-known technologies to those skilled in the art, and will not be described in detail here.

[0053] As attached Figure 2 and 3 As shown, the mixing pot 5 is detachably installed inside the mounting chamber 2 for containing and mixing plastic granules and color powder. The mixing pot 5 includes a lid 501 and a pot body 502. The lid 501 is detachably fixed to the pot body 502 by bolts to ensure its airtightness.

[0054] The cover 501 has an inlet 503 and a powder inlet 504 that are respectively aligned with the outlet and the powder outlet.

[0055] As attached Figure 2 and 3 As shown, a guide plate 505 is provided on the cover 501, and a guide groove 10 that cooperates with the guide plate 505 is provided on the top of the installation chamber 2 to ensure accurate positioning and stable installation of the mixing pot 5 in the installation chamber 2.

[0056] It is important to understand that the specific shapes and dimensions of the guide plate 505 and the guide groove 10 are precisely designed to ensure the installation accuracy and stability of the mixing pot 5.

[0057] The guide plate 505 and the guide groove 10 are made of high-strength wear-resistant steel, and the surface is hardened to extend their service life.

[0058] In terms of specific structure, both the feed inlet 503 and the powder inlet 504 are equipped with elastic interfaces. The elastic interfaces have interfaces that work with springs to achieve elastic expansion and contraction. Through elastic deformation, they achieve a sealed connection with the discharge outlet and the powder outlet to prevent leakage of materials and color powder during the conveying process.

[0059] The specific structure and installation method of the flexible interface are well-known to those skilled in the art and will not be described in detail here.

[0060] As attached Figure 3 As shown, the stirring assembly 6 is disposed in the mixing pot 5 and is driven by the drive assembly 7 mounted on the machine body 1. The stirring assembly 6 includes a stirring rod, which consists of a shaft 601 and stirring blades 602 connected to the shaft 601, forming an anchor-type stirring rod structure.

[0061] Specifically, shaft 601 is rotatably connected to cover 501 via bearings and is axially constrained on cover 501 to ensure stable rotation of the stirring rod. The specific type and installation method of the bearings are well-known to those skilled in the art and will not be described in detail here.

[0062] The upper end of the shaft 601 extends out of the cover and is provided with a protruding pin 603. On the opposite side, the output shaft of the driving assembly 7 is connected to the protruding pin 603 through a slot joint 701 to achieve quick-release shaft connection, so as to realize the rotary driving of the stirring rod.

[0063] The slot joint 701 is used to connect the protruding pin, and its specific structure and connection method are known to those skilled in the art, which will not be described in detail here.

[0064] In the specific structure, the stirring blade 602 is provided with at least two pieces, preferably three pieces, arranged in a ring around the axis of the shaft. The stirring blade 602 is in the shape of L, including a horizontal section 6001 and a vertical section 6002. One end of the horizontal section 6001 is connected to the shaft 601, and the other end extends upward to form the vertical section 6002. The horizontal section 6001 is inclined in the horizontal direction to form a first inclined surface 6003, and the vertical section 6002 near the top is inclined in the opposite direction to the horizontal section 6001 to form a second inclined surface 6004. During the stirring process, the first inclined surface 6003 and the second inclined surface 6004 mix the toner and the plastic particles by stirring, pushing and rolling, and make the toner firmly adhere to the surface of the particles. This structure design effectively improves the bonding strength of the toner and the particles, and ensures the uniformity and accuracy of the color matching.

[0065] More specifically, in the implementation, the material of the stirring blade 602 is usually high-strength stainless steel, and the surface is polished to reduce the adhesion of materials and toner and facilitate cleaning.

[0066] On the basis of the above structure, in this embodiment, the bottom of the pot body 502 is a flat structure to ensure that the materials are evenly distributed during stirring and avoid local accumulation.

[0067] As a preferred solution, to improve durability and ease of cleaning, the pot body 502 and the cover 501 are made of high-strength wear-resistant material to prolong the service life and reduce maintenance costs. The inner surface of the pot body 502 and the cover 501 is polished to reduce the adhesion of materials and toner and facilitate cleaning.

[0068] In addition, the inner wall of the pot body 502 is provided with a bending arc structure which is matched with the shape of the stirring blade 602 to optimize the flow path of the materials and toner and improve the mixing efficiency. The bottom of the pot body is provided with an opening which is matched with the opening and closing mechanism 8 located in the machine body 1. The opening and closing mechanism 8 controls the opening and closing of the opening to realize the discharging operation of the mixing pot 5.

[0069] In the specific structure, the opening and closing mechanism 8 adopts a telescopic structure, including a valve plate and a driving mechanism for driving the valve plate to move horizontally. The valve plate is opened and closed by the linear motion of the driving mechanism. The driving mechanism can be a pneumatic cylinder or an electric push rod to realize the horizontal telescopic motion of the valve plate.

[0070] According to the need, the edge of the valve plate can also be provided with a sealing gasket to ensure close contact with the bottom opening of the pot 502 in the closed state, preventing material leakage.

[0071] The specific model and installation method of the air cylinder or electric push rod are known to those skilled in the art, and will not be described in detail here.

[0072] As shown in the structure shown in the accompanying drawings Figure 2 In the structure shown in the accompanying drawings, the body 1 is provided with a discharge bin 9 below the installation bin 2, and the discharge bin 9 is communicated with the opening of the mixing pot 5 through the opening and closing mechanism 8 to control the communication state, so as to discharge the mixed material after the stirring is completed.

[0073] The bottom of the discharge bin 9 is provided with a discharge port, in addition, the outer side of the discharge bin 9 is provided with an observation window made of high-strength transparent material, which is convenient for the operator to monitor the discharging process in real time.

[0074] Through the description of the above embodiments, those skilled in the art can clearly understand the structure, working principle and operation method of the color matching device for injection molding, and can manufacture and use according to the actual needs.

[0075] Although the exemplary embodiments of the present disclosure have been described, those skilled in the art should understand that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure in essence. Therefore, all changes and modifications are included in the protection scope of the present disclosure defined by the claims. The present disclosure is limited by the appended claims, and the equivalents of these claims are also included.

Claims

1. A color matching device for injection molding, characterized in that, It includes the machine body (1), the installation chamber (2), the feeding device (3), the powder feeding device (4), the mixing pot (5), and the stirring assembly (6); The installation chamber (2) is located inside the machine body (1), and the feeding device (3) and the powder feeding device (4) are respectively installed on the machine body (1) and located above the installation chamber (2); The feeding device (3) adopts a volume feeding method, and the powder feeding device (4) adopts a weight feeding method. The mixing pot (5) is detachably installed in the installation chamber (2), and the stirring assembly (6) is set in the mixing pot (5) and driven by the drive assembly (7) installed on the machine body (1); The installation compartment (2) is equipped with an openable and closable sealed door; The installation chamber (2) is provided with a discharge port connected to the feeding device (3) and a powder discharge port connected to the powder feeding device (4); The mixing pot (5) includes a lid (501) and a pot body (502). The lid (501) has an inlet (503) and a powder inlet (504) that are respectively aligned with the outlet and the powder outlet. The bottom of the pot body (502) is provided with an opening, which cooperates with the opening and closing mechanism (8) in the installation chamber (2) to control the opening and closing of the opening.

2. The color matching device for injection molding according to claim 1, characterized in that, The stirring assembly (6) includes a stirring rod, which is composed of a shaft (601) and stirring blades (602) connected to the shaft (601), forming an anchor-type stirring rod structure; The shaft (601) is rotatably connected to the cover (501) via a bearing and is axially constrained on the cover (501); The upper end of the shaft (601) extends upward through the cover (501) and is provided with a protruding pin (603). The output shaft of the drive assembly (7) is connected to the protruding pin (603) through a slotted connector (701).

3. The color matching device for injection molding according to claim 2, characterized in that, The stirring blade (602) has at least two blades, arranged in a ring around the axis of the shaft (601); the stirring blade (602) is L-shaped in general, including a horizontal section (6001) and a vertical section (6002); one end of the horizontal section (6001) is connected to the shaft (601), and the other end extends upward to form the vertical section (6002); the horizontal section (6001) is inclined in the horizontal direction to form a first inclined surface (6003), and the top of the vertical section (6002) is inclined in the opposite direction to the horizontal section (6001) to form a second inclined surface (6004).

4. The color matching device for injection molding according to claim 3, characterized in that, The stirring blades (602) consist of three pieces.

5. A color matching device for injection molding according to claim 1, characterized in that, The sealing door is closed and sealed by electromagnetic attraction or mechanical fixation; the contact surface between the sealing door and the installation chamber (2) is provided with a sealing strip.

6. The color matching device for injection molding according to claim 1, characterized in that, The opening and closing mechanism (8) adopts a telescopic structure, including a valve plate and a drive mechanism that drives the valve plate to move horizontally.

7. A color matching device for injection molding according to claim 6, characterized in that, The opening and closing mechanism (8) is driven by a cylinder or an electric push rod; the edge of the valve plate is provided with a sealing gasket.

8. A color matching device for injection molding according to claim 1, characterized in that, The machine body (1) has a discharge chamber (9) below the installation chamber (2). The opening of the discharge chamber (9) and the mixing pot (5) are connected and controlled by the opening and closing mechanism (8). The bottom of the discharge chamber (9) is provided with a discharge port, and the outside of the discharge chamber (9) is provided with an observation window.

9. The color matching device for injection molding according to claim 1, characterized in that, The cover (501) is provided with a guide plate (505), and the top of the installation chamber (2) is provided with a guide groove (10) that cooperates with the guide plate (505).

10. The color matching device for injection molding according to claim 1, characterized in that, The feed inlet (503) and powder inlet (504) on the cover (501) are both equipped with flexible interfaces.

Images