Foaming machine for forming plastic model

Abstract

The invention discloses a foaming machine for plastic model forming, and relates to the technical field of foaming machines. A position adjusting assembly; a high-pressure mixing head; a plurality of groups of feeding assemblies; the mold is used for molding a plastic model, and a mold cavity is formed in the mold; the shape measuring device is used for observing, detecting and recording the shape of the upper die cavity of the die; the device has the advantages that the shape measuring device is arranged, the industrial camera shoots the shape of the upper mold cavity of the mold, the definition is improved through the lens, the shot image is transmitted to the computing device through the image acquisition card, and then the image processing software installed on the computing device in advance is used for measuring the shape of the upper mold cavity of the mold. Edge detection and contour extraction are realized by pre-compiling or adopting an existing algorithm, so that the edge of the die cavity is accurately identified and recorded, the shape information of the die cavity is known, the displacement use of the position adjusting assembly is controlled, the operation accuracy of blanking is improved, and particularly, the practicability is high for batch production and use.

Description

Technical Field

[0001] The invention relates to the technical field of foaming machines, and more particularly to a foaming machine for plastic model molding. Background Art

[0002] A foaming machine for plastic model molding usually refers to equipment used in manufacturing plastic human models or clothing display models. This type of equipment is mainly used to produce lightweight and durable plastic models through a foaming process; the foaming process can form a tiny bubble structure inside the plastic material, thereby greatly reducing the weight of the product while maintaining a certain strength and stability, which is especially important for clothing models that need to be carried and frequently adjusted. [For example, Publication (Announcement) No.: CN109130057A, a polyurethane foaming machine] can be used to make plastic clothing models; And the methods of performing mold forming foaming generally include direct injection molding foaming and pouring foaming as shown below; Direct injection molding foaming: This method is similar to the traditional plastic injection molding process, but a foaming agent is added to the raw material. The machine directly injects the plastic melt mixed with the foaming agent into the preheated mold. Once the injection is completed, the mold remains closed, and the plastic begins to foam, expand, cool and solidify in the mold to form a porous plastic mold. This method is suitable for products that require precise control of shape and size, and has high production efficiency; Pouring foaming: using an open mold, first open a part of the mold or set it to be movable, then pour the liquid foaming material into the mold cavity, then close the mold to allow the material to foam and solidify in a closed space. This method may be more suitable for making plastic models with larger sizes or more complex structures because it provides more operating space and flexibility, but the production efficiency is relatively low and may require more manual intervention {the mold used may be: similar to (as shown in the publication (announcement) number: CN212219034U, a styrene-free resin model hanger mold), using a half-expanded structure}, that is, after adding material to one half, it is closed and covered to make it foam in the relative space; Since the plastic model is large and has different degrees of concavity and convexity, it is more appropriate to use pouring foaming {as shown in Publication (Announcement) No.: CN111923314B, a polyurethane foaming machine}, by setting a mold under the "spray gun head" to add materials; According to the above-mentioned "polyurethane foaming machine", although the "spray gun head" can be adjusted by the "robotic arm drive cabinet" to facilitate the uniform addition of foaming material to the molding groove of the mold, the contour of the model is irregular and models with different contours generally need to be made. At this time, it is inconvenient to only use the "robotic arm drive cabinet" to control the "spray gun head" to adjust the position. Summary of the invention

[0003] The object of the present invention is to solve the above-mentioned technical problems and provide a foaming machine for plastic model molding.

[0004] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: The present invention provides a foaming machine for plastic model molding, comprising: Bracket; A positioning assembly, which is fixed on the bracket; A high-pressure mixing head, which is fixedly mounted on the output end of the positioning assembly; Multiple groups of material supply components, each of which is connected to a high-pressure mixing head to supply different materials simultaneously; Also included is a mold for molding a plastic model, the mold having a mold cavity; Also included is a shape measuring device for observing, detecting and recording the shape of the mold cavity on the mold; The shape measuring device includes an industrial camera fixed on the high-pressure mixing head, a lens installed on the industrial camera, and a computing device connected to the industrial camera through an image acquisition card, and the image processing software on the computing device performs analysis.

[0005] As a preferred technical solution of the present invention, the positioning assembly includes a Z-axis displacement driver fixed on the bracket, a Y-axis displacement driver fixed at the output end of the Z-axis displacement driver, and an X-axis displacement driver fixed at the output end of the Y-axis displacement driver, and the high-pressure mixing head is fixed on the output end of the X-axis displacement driver.

[0006] As a preferred technical solution of the present invention, the Z-axis displacement driver, the Y-axis displacement driver and the X-axis displacement driver have the same structural composition.

[0007] As a preferred technical solution of the present invention, the Z-axis displacement driver or the Y-axis displacement driver or the X-axis displacement driver includes a fixed seat, a servo motor fixed on the fixed seat, a threaded rod fixed to the output end of the servo motor, a slide rail fixed on the fixed seat, a slider slidably connected to the slide rail, and a connecting plate fixed to the slider, the thread of the threaded rod passes through the opposite ends of the slider, and the outer side of the threaded rod is rotatably connected to the fixed seat.

[0008] As a preferred technical solution of the present invention, the feeding assembly includes a tank body, a bracket fixed outside the tank body, a heating plate installed inside the tank body, a first temperature sensor fixed on the tank body, a feeding assembly, an air pipe, a pressure gauge, a stirring assembly and a discharge valve, a metering pump connected to the fixed discharge valve, and a feeding pipe connected to the discharge end of the metering pump; The sensing end of the first temperature sensor is fixedly penetrated into the tank body for communication, the sensing end of the pressure gauge is fixedly penetrated into the tank body for communication, and the discharge end of the feeding pipe is fixedly connected to the inlet end of the high-pressure mixing head.

[0009] As a preferred technical solution of the present invention, the stirring assembly includes a rotary driver fixed to the top of the tank body, a rotating shaft fixed to the output end of the rotary driver, and a stirring blade fixed to the outside of the tank body, and the stirring blade is inside the tank body.

[0010] As a preferred technical solution of the present invention, the feeding assembly includes a feed pipe fixedly inserted into the tank body, a second temperature sensor fixedly mounted outside the feed pipe, a feed valve fixedly mounted in communication with the feed pipe, and a heating pipe fixedly connected to the feed valve, and the sensing end of the second temperature sensor is fixedly inserted into the feed pipe for communication.

[0011] As a preferred technical solution of the present invention, the heating tube includes an outer tube, an inner tube centrally fixed inside the outer tube, and a sealed tubular cavity formed between the outer tube and the inner tube, in which a heating wire is installed and an insulating filler is provided.

[0012] The beneficial effects of the present invention are as follows: By installing a shape measuring device on the high-pressure mixing head, an industrial camera is used to capture the shape of the mold cavity, and the clarity is improved by the lens. The captured image is transmitted to the computing device through an image acquisition card, and then the image processing software pre-installed on the computing device uses pre-written or existing algorithms to implement edge detection and contour extraction, so as to accurately identify and record the edge of the mold cavity, so as to understand the shape information of the mold cavity, thereby controlling the displacement of the positioning component and improving the accuracy of the blanking operation, which is especially practical for batch production. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 Schematic diagram of the local structure A; Figure 3 yes Figure 1 Schematic diagram of the local structure B.

[0014] Figure markings: bracket-1, Z-axis displacement driver-2, Y-axis displacement driver-3, X-axis displacement driver-4, high-pressure mixing head-5, feeding assembly-6, shape measuring device-7, fixed seat-a, servo motor-b, threaded rod-c, slide rail-d, slider-e, connecting plate-f, tank body-61, bracket-62, heating plate-63, first temperature sensor-64, feeding assembly-65, air pipe-66, pressure gauge-67, stirring assembly-68, discharge valve-69, metering pump-610, feeding pipe-611, feeding pipe-651, second temperature sensor-652, feeding valve-653, heating pipe-654, rotation driver-681, rotating shaft-682, stirring blade-683, outer tube-6541, inner tube-6542, clamping cavity-6543. DETAILED DESCRIPTION Embodiment 1:

[0015] like Figures 1 to 3 As shown, this embodiment proposes: a foaming machine for plastic model molding, comprising: Bracket 1; A positioning assembly, which is fixed on the bracket 1; The high-pressure mixing head 5 is fixedly mounted on the output end of the positioning assembly so that the position of the high-pressure mixing head 5 can be adjusted by the positioning assembly; Multiple groups of feeding components 6 (similar to the combined structure of two groups of raw material feeding used in "CN109130057A" to hold different materials), which are respectively connected to the high-pressure mixing head 5 to simultaneously feed different materials; Also included is a mold for plastic model molding, the mold having a mold cavity (such as Figure 1 As shown, the mold is arranged below the high-pressure mixing head 5, and the mold cavity is arranged in the center of the top of the mold); It also includes a shape measuring device 7 for observing and detecting the shape of the mold cavity on the mold and recording it, so as to facilitate the above-mentioned high-pressure mixing head 5 to reasonably adjust the position and add materials; In order to implement the above-mentioned shape measuring device 7, it is proposed as follows Figure 1 As shown, the specific structure and composition of the shape measuring device 7 can be as follows: the shape measuring device 7 includes an industrial camera 71 fixedly mounted on the high-pressure mixing head 5 to photograph the top of the mold and the mold cavity (the industrial camera 71 used can be built-in with a high-speed interface such as GigE Vision, USB3 Vision or Camera Link, so as to be directly connected to the computing device 73 for data transmission, which can simplify the system configuration); The lens 72 installed on the industrial camera 71 improves the clarity of the image captured by the industrial camera 71 (the lens can be a fixed-focus lens, a zoom lens, or a telecentric lens to be suitable for use in different situations); and a computing device 73 (the computing device 73 may be a computer, etc.) connected to the industrial camera 71 via an image acquisition card, and image processing software (the image processing software may use software such as OpenCV, Halcon or VisionPro for image analysis, and write or use existing algorithms to implement edge detection and contour extraction, so as to accurately identify and record the edge of the mold cavity) on the computing device 73 for analysis; According to the above, when the shape measuring device 7 is in use: the shape of the mold cavity on the mold is photographed by the industrial camera 71, and the clarity is improved by the lens 72. The photographed image is transmitted to the computing device 73 through the image acquisition card, and then the image processing software pre-installed on the computing device 73 implements edge detection and contour extraction through pre-written or existing algorithms to accurately identify and record the edge of the mold cavity, so as to understand the shape information of the mold cavity, thereby controlling the displacement of the positioning component and improving the accuracy of the blanking operation, especially for batch production use, with high practicality. Embodiment 2:

[0016] like Figures 1 to 3 As shown, the difference between it and Example 1 is that, in order to implement the above-mentioned positioning component, the specific structure and composition of the positioning component are proposed. The structure can be "the mechanical arm drive cabinet in CN111923314B described in the background technology", or can be as follows: The positioning assembly includes a Z-axis displacement driver 2 fixed on the bracket 1, a Y-axis displacement driver 3 fixed at the output end of the Z-axis displacement driver 2, and an X-axis displacement driver 4 fixed at the output end of the Y-axis displacement driver 3. The high-pressure mixing head 5 is fixed on the output end of the X-axis displacement driver 4 (in this way, the high-pressure mixing head 5 can be conveniently moved forward and backward, left and right, and up and down, with high flexibility); Furthermore, the Z-axis displacement driver 2, the Y-axis displacement driver 3 and the X-axis displacement driver 4 have the same structural composition; The structure of the Z-axis displacement driver 2, the Y-axis displacement driver 3, or the X-axis displacement driver 4 is as follows: The invention comprises a fixed seat a, a servo motor b fixed on the fixed seat a, a threaded rod c fixed to the output end of the servo motor b, a slide rail d fixed on the fixed seat a, a slider e slidably connected to the slide rail d, and a connecting plate f fixed to the slider e, wherein the threaded rod c threads penetrate the opposite ends of the slider e, and the outer side of the threaded rod c is rotatably connected to the fixed seat a (such as Figure 2As shown, the fixed seat a is U-shaped, the servo motor b is fixed on the top of the fixed seat a, the threaded rod c is located between the U-shaped fixed seat a, and the upper and lower rod ends of the threaded rod c penetrate the fixed seat a and rotate through bearings and other rotating parts. When the servo motor b is running, the threaded rod c is driven to rotate, and the slider e is guided by the slide rail d and moves up and down through the thread rotation); According to the above, if Figure 1 , that is, the fixing seat a of the Z-axis displacement driver 2 fixes the bracket 1, and the connecting plate f of the Z-axis displacement driver 2 is connected to the fixing seat a of the Y-axis displacement driver 3; The connecting plate f of the Y-axis displacement driver 3 is connected to the fixing seat a of the X-axis displacement driver 4; The connecting plate f of the X-axis displacement driver 4 is connected to the high-pressure mixing head 5; In this way, the high-pressure mixing head 5 is adjusted in position in the X-, Y-, and Z-axis directions. Embodiment 3:

[0017] like Figures 1 to 3 As shown, the difference between it and embodiment 1 is that, in order to realize the implementation and use of the above-mentioned feeding component 6, the specific structure and composition of the feeding component 6 are proposed. The structure can be "the combined structure of the two groups of raw material feeds used in CN109130057A described in the background technology", or it can be as follows: The feeding assembly 6 includes a tank body 61, a bracket 62 fixed outside the tank body 61, a heating plate 63 installed inside the tank body 61, a first temperature sensor 64 fixed on the tank body 61 (the first temperature sensor 64 model can be: MIK-WZPK, etc.), a feeding assembly 65, an air pipe 66 (an electric regulating valve is also installed between the air pipes 66), a pressure gauge 67, a stirring assembly 68 and a discharge valve 69 (the discharge valve 69 is an electric regulating valve), a metering pump 610 connected to the fixed discharge valve 69, and a feeding pipe 611 connected to the discharge end of the metering pump 610; The sensing end of the first temperature sensor 64 is fixedly penetrated into the tank body 61 and communicated with the sensing end of the pressure gauge 67, which is fixedly penetrated into the tank body 61 and communicated with the discharge end of the feeding pipe 611 and the inlet end of the high-pressure mixing head 5 fixedly installed therein; According to the above, if Figure 1As shown, when the feeding component 6 is in use: the bracket 62 is used to support the tank body 61 as a whole, the feeding component 65 adds materials to the tank body 61, the heating plate 63 heats the temperature of the material, and the first temperature sensor 64 monitors the heating temperature for temperature control, the stirring component 68 can stir the material to provide uniform and uniform heat, the air pipe 66 (the electric regulating valve between the air pipe 66 is opened) is connected to an externally arranged air pump to supply pressure to the tank body 61, and the pressure inside the tank body 61 is monitored by the barometer 67. When the high-pressure mixing head 5 is sprayed out, the discharge valve 69 is opened, and the metering pump 610 is started to pressurize the material in the tank body 61 and pass it through the feeding pipe 611 to the high-pressure mixing head 5.

[0018] Specifically: the stirring assembly 68 includes a rotary driver 681 (which may be a servo motor of the rotary driver 681, etc.) fixedly mounted on the top of the tank body 61, a rotating shaft 682 fixed to the output end of the rotary driver 681, and a stirring blade 683 fixedly mounted outside the tank body 61, and the stirring blade 683 is located inside the tank body 61 (as shown in the figure, the rotation of the rotary driver 681 can drive the rotating shaft 682 and the stirring blade 683 to rotate simultaneously, so as to stir the material in the tank body 61).

[0019] In order to improve the continuity efficiency during use and reduce the temperature difference between the added material and the original material, a feeding component 65 is proposed, and the structure of the feeding component 65 is as follows: The feeding component 65 includes a feed pipe 651 fixedly inserted into the tank body 61, a second temperature sensor 652 fixedly mounted outside the feed pipe 651 (the model of the second temperature sensor 652 can be: MIK-WZPK, etc.), a feed valve 653 fixedly mounted in communication with the feed pipe 651, and a heating pipe 654 fixedly connected to the feed valve 653 (the feed valve 653 is an electric regulating valve). The sensing end of the second temperature sensor 652 is fixedly inserted into the feed pipe 651 for communication (the feed valve 653 is opened, and the heating pipe 654 is connected to the external material supply. In the meantime, an air pump is added to draw the material into the heating pipe 654 for circulation and preheating, and then the material enters the feed pipe 651 to be monitored by the second temperature sensor 652 for temperature, and then is discharged into the tank body 61 for replenishment). The flow preheating method is adopted, the structure is simple, and does not affect the original structural composition.

[0020] The structure of the heating tube 654 may be a structure composed of an electric heating plate (and the length of the heating tube 654 may be set according to the required preheating, etc.); Specifically: the heating tube 654 includes an outer tube 6541, an inner tube 6542 centrally fixed on the inner side of the outer tube 6541, and a sealed tubular clamping cavity 6543 formed between the outer tube 6541 and the inner tube 6542, a heating wire is installed in the clamping cavity 6543 and is provided with an insulating filler (the insulating filler can be magnesium oxide powder, etc., for strengthening insulation and preventing leakage), (the material of the outer tube 6541 and the inner tube 6542 is stainless steel), and an external power is used to connect the heating wire (resistance wire) to generate heat to heat the material in the inner tube 6542.

[0021] It also includes a controller (a PLC controller, not shown in the figure) for connecting to an external power source to open and close the power supply for electrical components.

[0022] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0023] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0024] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A foaming machine for plastic model molding, comprising: Bracket (1); A positioning assembly fixedly mounted on the bracket (1); A high-pressure mixing head (5) fixedly mounted on the output end of the positioning assembly; A plurality of groups of material supply components (6), each of which is respectively connected to a high-pressure mixing head (5) to supply different materials simultaneously; It is characterized in that Also included is a mold for molding a plastic model, the mold having a mold cavity; It also includes a shape measuring device (7) for observing, detecting and recording the shape of the mold cavity on the mold; The shape measuring device (7) comprises an industrial camera (71) fixedly mounted on the high-pressure mixing head (5), a lens (72) mounted on the industrial camera (71), and a computing device (73) connected to the industrial camera (71) via an image acquisition card, and image processing software on the computing device (73) performs analysis.

2. A foaming machine for plastic model molding according to claim 1, characterized in that: The positioning assembly comprises a Z-axis displacement driver (2) fixedly mounted on a bracket (1), a Y-axis displacement driver (3) fixedly mounted on an output end of the Z-axis displacement driver (2), and an X-axis displacement driver (4) fixedly mounted on an output end of the Y-axis displacement driver (3); a high-pressure mixing head (5) is fixedly mounted on the output end of the X-axis displacement driver (4).

3. A foaming machine for plastic model molding according to claim 2, characterized in that: The Z-axis displacement driver (2), the Y-axis displacement driver (3) and the X-axis displacement driver (4) have the same structural composition.

4. A foaming machine for plastic model molding according to claim 3, characterized in that: The Z-axis displacement driver (2) or the Y-axis displacement driver (3) or the X-axis displacement driver (4) comprises a fixed seat (a), a servo motor (b) fixed on the fixed seat (a), a threaded rod (c) fixed to the output end of the servo motor (b), a slide rail (d) fixed on the fixed seat (a), a slider (e) slidably connected to the slide rail (d), and a connecting plate (f) fixed to the slider (e), wherein the threaded rod (c) has threads extending through opposite ends of the slider (e), and the outer side of the threaded rod (c) is rotatably connected to the fixed seat (a).

5. A foaming machine for plastic model molding according to claim 1, characterized in that: The material supply assembly (6) comprises a tank body (61), a bracket (62) fixedly mounted outside the tank body (61), a heating plate (63) installed inside the tank body (61), a first temperature sensor (64) fixedly mounted on the tank body (61), a material supply assembly (65), an air pipe (66), a pressure gauge (67), a stirring assembly (68), a material discharge valve (69), a metering pump (610) connected to and fixed to the material discharge valve (69), and a material supply pipe (611) connected to and fixed to the discharge end of the metering pump (610); The sensing end of the first temperature sensor (64) is fixedly inserted into the tank body (61) for communication, the sensing end of the pressure gauge (67) is fixedly inserted into the tank body (61) for communication, and the discharge end of the feeding pipe (611) is fixedly connected to the inlet end of the high-pressure mixing head (5).

6. A foaming machine for plastic model molding according to claim 5, characterized in that: The stirring assembly (68) comprises a rotary driver (681) fixedly mounted on the top of the tank body (61), a rotating shaft (682) fixed to the output end of the rotary driver (681), and a stirring blade (683) fixedly mounted outside the tank body (61); the stirring blade (683) is located inside the tank body (61).

7. A foaming machine for plastic model molding according to claim 5, characterized in that: The feeding assembly (65) comprises a feed pipe (651) fixedly inserted into and connected to the tank body (61) outside, a second temperature sensor (652) fixedly mounted outside the feed pipe (651), a feed valve (653) fixedly mounted and connected to the feed pipe (651), and a heating pipe (654) fixedly connected to the feed valve (653). The sensing end of the second temperature sensor (652) is fixedly inserted into and connected to the feed pipe (651).

8. A foaming machine for plastic model molding according to claim 7, characterized in that: The heating tube (654) comprises an outer tube (6541), an inner tube (6542) centrally fixed inside the outer tube (6541), and a sealed tubular clamping cavity (6543) formed between the outer tube (6541) and the inner tube (6542), wherein a heating wire is installed in the clamping cavity (6543) and an insulating filler is provided.

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