Horizontal rotary two-color injection molding machine with stable switching of injection units

Abstract

The present application relates to injection molding machine technical field, specifically to a kind of stable switching injection unit's horizontal rotary double-color injection molding machine, including two injection units, fixed mold plate and movable mold plate, one side of the fixed mold plate is fixedly connected with the injection unit, the other side of the fixed mold plate is movably connected with movable mold plate, the movable mold plate is also rotationally connected with the rotating disc driven by rotating motor, the central position of the rotating disc is also provided with angle detection unit for detecting rotating angle of rotating disc, the angle detection unit is electrically connected with single-chip microcomputer for receiving angle detection unit detection signal, the single-chip microcomputer is electrically connected with the rotating motor, for controlling the on-off of rotating motor, can prevent excessive friction to cause rotating disc to be stuck, even burn motor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection molding machines, in particular to a horizontal rotary double-color injection molding machine capable of stable switching of injection units. BACKGROUND

[0002] An injection molding machine is a main molding equipment for making various plastic products from thermoplastic or thermosetting plastics by using a plastic molding mold. For plastic products including two colors, a double-color injection molding machine is generally used for production. The double-color injection molding machine is composed of two sets of injection devices and one set of mold closing device. The mold closing device has a rotating mechanism in the center, which is generally a rotatable rotary mold plate at the lower end. The rotary mold plate can be translated and rotated. After the injection of one side is completed, the rotary mold plate is rotated for the injection of the other side. This kind of mold closing device can realize accurate rotary positioning of horizontal rotation, reduce the running cycle, and keep the stability of the overall performance.

[0003] The patent with application number CN116160617B discloses a double-color injection molding structure, which comprises a double-color injection molding machine body provided with two fixed molds, a rotatable turntable provided with two movable molds, a turntable driving mechanism, a base material waste collection box and a cover waste collection box, a waste identification system, a base material injection part ejection mechanism, a base material waste collection mechanism, and a finished product collection component.

[0004] The base material waste collection mechanism comprises a base material waste classification component and a base material waste crushing component. The base material waste crushing component is installed inside the base material waste collection box and is used for crushing the base material waste. The finished product collection component is used for collecting the finished products of double-color injection molding. The present application can separately collect the finished products and waste materials, and can classify and collect the base material waste and cover material waste, thereby facilitating the classified recycling of different materials.

[0005] The above patent realizes the switching of injection units by adjusting the angle of the rotatable turntable. However, the addition of a rotating turntable also brings corresponding problems. If the rotating turntable is fixed with molds of a large size, the friction between the two contact surfaces of the rotating turntable surface and the rotating turntable bottom plate may cause damage to the two contact surfaces, causing the rotating turntable to be stuck, the rotating turntable driving motor to be overloaded, and the motor to be burned out.

[0006] Based on the above problems, there is an urgent need for a double-color injection molding machine that can prevent excessive friction of the rotating turntable surface. SUMMARY

[0007] In view of the problem that the rotating turntable of the current double-color injection molding machine may be stuck due to excessive friction, and even the motor may be burned out, the present application provides a horizontal rotary double-color injection molding machine capable of stable switching of injection units to solve the above problems.

[0008] To achieve the above object, the present application is realized by the following technical solutions.

[0009] The embodiment of the present application discloses a horizontal rotary double-color injection molding machine capable of stably switching injection units, comprising two injection units, a fixed mold plate and a movable mold plate, one side of the fixed mold plate is fixedly connected with the injection units, the other side of the fixed mold plate is movably connected with the movable mold plate, and the movable mold plate is further rotationally connected with a rotating disc driven by a rotating motor.

[0010] A central position of the rotating disc is further provided with an angle detection unit for detecting the rotating angle of the rotating disc, the angle detection unit is electrically connected with a single-chip microcomputer for receiving the detection signal of the angle detection unit, and the single-chip microcomputer is electrically connected with the rotating motor, for controlling the on-off of the rotating motor according to whether the angle signal detected by the angle detection unit meets a specified angle.

[0011] Optionally, the single-chip microcomputer is further electrically connected with a temperature detection unit and a dust cleaning device, the temperature detection unit is arranged on the upper surface of the movable mold plate, and the dust cleaning device is arranged between the rotating disc and the movable mold plate, and the single-chip microcomputer is used for judging whether the temperature detected by the temperature detection unit reaches a threshold value, so as to control the dust cleaning device to clean between the rotating disc and the movable mold plate.

[0012] Optionally, the single-chip microcomputer is further electrically connected with an alarm device, which alarms when the rotating motor stops rotating.

[0013] Optionally, the single-chip microcomputer is further electrically connected with an infrared sensing unit, which is arranged between the movable mold plate and the rotating disc and is used for sensing the distance of the friction position.

[0014] Optionally, the infrared sensing unit comprises an infrared range finder and a moving device, the infrared range finder is fixed on the moving device, and the moving device moves up and down on one side of the rotating disc to sense the position of the friction position.

[0015] Optionally, the moving device and the infrared range finder are electrically connected with the single-chip microcomputer, and the single-chip microcomputer is electrically connected with a display unit, and the display unit is used for displaying the position of the friction position.

[0016] Optionally, one side of the rotating disc is provided with an arc-shaped groove, and a plurality of rolling balls are arranged in the arc-shaped groove, the arc-shaped groove is consistent with the center of the rotating disc and is arranged between the rotating disc and the movable mold plate.

[0017] Optionally, a plurality of spring mechanisms are arranged between the movable mold plate and the rotating disc, and the spring mechanism comprises an adjusting jack, a top block and a spring, the upper side of the adjusting jack is embedded in the spring, and the lower side of the top block is embedded in the spring.

[0018] The present application has the following advantages:

[0019] The improvement is that the angle detection unit for detecting the rotating angle of the rotating disc is designed at the rotating disc of the two-color injection molding machine, when the rotating disc rotates 180 degrees, the switching of the injection molding unit can be completed, when the friction exists between the rotating disc and the movable mold, the rotating disc cannot complete the 180-degree rotation, the friction condition can be determined by detecting the rotating angle of the rotating disc, the single-chip microcomputer and the rotating motor for controlling the rotating of the rotating disc are connected, when the friction exists, the rotating motor is timely closed, the excessive friction which causes the rotating disc to be stuck and even the motor to be burnt can be prevented. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0021] Figure 1 The circuit connection block diagram of the present application;

[0022] Figure 2 The overall structure schematic diagram of the injection molding machine of the present application;

[0023] Figure 3 The movable mold plate structure schematic diagram of the present application;

[0024] Figure 4 The rotating disc structure schematic diagram of the present application; Figure 3 The structure schematic diagram of the A place in the present application;

[0025] Figure 5 The rotating disc structure schematic diagram of the present application.

[0026] In the drawings: 1, injection molding unit; 2, fixed mold plate; 3, movable mold plate; 4, rotating motor; 5, rotating disc; 6, angle detection unit; 7, single-chip microcomputer; 8, temperature detection unit; 9, dust removal device; 10, alarm device; 11, infrared induction unit; 12, infrared range finder; 13, moving device; 14, display unit; 15, arc-shaped groove; 16, ball; 17, spring mechanism; 18, adjusting ejector rod; 19, ejector block; 20, spring. DETAILED DESCRIPTION

[0027] In the following description, specific details are set forth such as particular system configurations, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. However, persons skilled in the art should understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted in order not to obscure the description of the present application with unnecessary details.

[0028] Please refer toFigures 1-5 The embodiment of the application discloses a horizontal rotary double-color injection molding machine for stably switching injection units. In order to save the time for cleaning the material tank of the injection molding machine and the heating time, the device is designed with two injection units 1. When the injection of one material is completed, the injection of another material is immediately performed through the other injection unit 1. When the injection unit 1 is adjusted, a turntable 5 is generally used. During the rotation of the turntable 5 by 180°, one injection unit 1 is adjusted to be connected to the mold of the other injection unit 1, and the original injection unit 1 is in a sealed state. However, if the turntable 5 and the movable die plate 3 are not parallel or partially contact, friction is easily generated during the rotation, which causes damage to the turntable 5 and the movable die plate 3 or even causes the situation of being stuck. When the turntable 5 is driven by the rotating motor 4, if the situation is not handled in time, the energy used for the rotation of the turntable 5 cannot be utilized and heat is generated through the power equipment, which easily damages the power equipment. Based on this, on the basis of the main equipment such as the fixed die plate 2, the movable die plate 3, the two injection units 1 and the rotating motor 4, an angle detection unit 6 for detecting the rotation angle of the turntable 5 is further arranged at the central position of the turntable 5. The angle detection unit 6 is electrically connected with a single-chip microcomputer 7 for receiving the detection signal of the angle detection unit 6, and the single-chip microcomputer 7 is electrically connected with the rotating motor 4 and is used for controlling the on-off of the rotating motor 4. When there is dust and untreated material between the turntable 5 and the movable die plate 3 or the turntable 5 and the movable die plate 3 are not parallel or contact each other, the situation of being stuck is generated during the rotation, the rotation by 180° cannot be realized, and the inlet of the injection unit 1 cannot be adjusted smoothly. At this time, the angle detection device detects the rotation angle of the turntable 5 for multiple times within a certain time and transmits the angle information to the single-chip microcomputer 7. A judgment program is set in the single-chip microcomputer 7. When the command of rotating the turntable 5 by 180° has been implemented for a period of time, but the rotation angle of the turntable 5 is always lower than 180°, a control command is immediately sent to the rotating motor 4 for controlling the rotation of the turntable 5 to stop running, so as to prevent the rotating motor 4 from further providing force to the turntable 5 to generate friction between the turntable 5 and the fixed die plate 2, damage the turntable 5 and the fixed die plate 2, and stop the friction between the turntable 5 and the fixed die plate 2 from hindering the rotating motor 4.

[0029] In the above embodiment, the rotation angle is judged to determine whether the rotating disc 5 completes 180° conversion, but when the resistance between the rotating disc 5 and the movable mold plate 3 is not large enough, the rotating disc 5 can still rotate 180° in the case of overcoming the friction, but the friction between the rotating disc 5 and the movable mold plate 3 still exists, which causes damage to the rotating disc 5 and the movable mold plate 3, and cannot be indirectly judged by the detection device. It is worth mentioning that the friction between the rotating disc 5 and the movable mold plate 3 is metal friction, and the friction between the rotating disc 5 and the injection material is the friction between metal and plastic. The heat generated by metal friction is higher than that generated by the friction between metal and plastic, and the heat conduction performance of metal is better. Based on this, a temperature detection module is designed and arranged, and the single-chip microcomputer 7 is further electrically connected with a temperature detection unit 8 and a dust removal device 9. The temperature detection unit 8 is arranged on the upper surface of the movable mold plate 3. According to the statistical data of multiple experiments, the first temperature range generated by the metal between the movable mold plate 3 and the rotating disc 5 in the friction process and the second temperature range generated by the friction between the movable mold plate 3 and the plastic are obtained. The two range values are set in the single-chip microcomputer 7 by program. The temperature detection unit 8 detects the temperature on the upper surface of the movable mold plate 3 multiple times in a certain time, and transmits the detected temperature to the single-chip microcomputer 7. The single-chip microcomputer 7 further judges whether the temperature falls within the first temperature range and the second temperature range. When it falls within the first temperature range, it proves that the friction between the movable mold plate 3 and the rotating disc 5 is generated, and a control command can be directly sent to the rotating motor 4 to stop running, which is equivalent to adding a protective measure. When the temperature falls within the second temperature range, it proves that the friction between the rotating disc 5 and the plastic is generated. The single-chip microcomputer 7 sends a control command to the dust removal device 9 according to the judgment result to clean the residual material and dust between the rotating disc 5 and the movable mold plate 3. If the temperature continues to rise or cannot rotate during rotation, the single-chip microcomputer 7 in the above embodiment can judge whether the angle detected by the angle detection unit 6 and the temperature detected by the temperature detection device fall within the first temperature range, and then implement the corresponding control command to stop the rotating motor.

[0030] In the above embodiment, the inductive module is used for induction, and the rotating motor 4 is stopped in time, but the reason for stopping the motor is not only the control of the single-chip microcomputer 7. Contact failure or power overload can cause the rotating motor to stop running. If the operator starts the rotating motor 4 again, it may cause further damage to the rotating motor 4. Therefore, the single-chip microcomputer 7 is further electrically connected with an alarm device. It is worth mentioning that when the rotating motor 4 stops rotating, the alarm device 10 will alarm immediately, and the relevant operator can know that the motor stops rotating due to friction, and further maintenance operation can be performed

[0031] In the above embodiment, we designed the temperature detection unit 8 and the angle detection unit 6 to judge whether there is friction and jamming by sensing the parameters related to the turntable 5 and make timely processing, when the friction is between the turntable 5 and the movable mold plate 3, it is impossible to manually determine the position of the friction, so it is impossible to further adjust the angle of the turntable 5 to make the turntable 5 parallel to the movable mold plate 3, prevent the friction between the turntable 5 and the movable mold plate 3 again when starting again, if the turntable 5 and the movable mold plate 3 are parallel, there will be no contact friction, when using infrared light irradiation, it can pass, but if there is friction, that is, the turntable 5 and the movable mold plate 3 will be in contact, the contact will block the infrared light, based on this, we also electrically connect the infrared sensing unit 11 at the single-chip microcomputer 7, the infrared sensing unit 11 is arranged between the movable mold plate 3 and the turntable 5, and emits infrared light between the turntable 5, when the contact is blocked, it will be reflected back, the infrared sensing device will collect and send the information to the single-chip microcomputer 7, and further judge the distance between the blocking and the infrared sensing unit 11, that is, the distance between the friction and the infrared sensing unit 11 according to the irradiation and the reflection time and the speed of the infrared light.

[0032] The above embodiment uses the infrared sensing unit 11 to measure the distance of the blocking, but the friction may not be at the same height, if the friction is not at the height of the infrared sensing unit 11, it is still impossible to detect, based on this, the infrared sensing unit 11 includes an infrared range finder 12 and a moving device 13, the infrared range finder 12 is fixed on the moving device 13, at the same time when the infrared range finder 12 emits light, the moving device 13 moves up and down at the same time, records the height of the moving device 13 and the distance measured by the infrared range finder 12, which can determine the horizontal coordinate and the vertical coordinate of the friction, and the horizontal coordinate and the vertical coordinate can further confirm the position of the friction, the relevant operator can confirm the position of the friction according to the distance measured by the infrared range finder 12 and the height of the moving device 13.

[0033] In the above embodiment, we use the mobile device 13 and the infrared range finder 12 to confirm the lateral coordinates and longitudinal coordinates of the friction position, and the operator can further measure the distance according to the coordinate data to confirm the approximate position of the friction position. However, the manual measurement method is relatively cumbersome. Therefore, we electrically connect the mobile device 13 and the infrared range finder 12 to the single-chip microcomputer 7, electrically connect the single-chip microcomputer 7 to the display unit 14, design a virtual turntable 5 and a coordinate model through a corresponding program, and confirm the coordinates of the friction position according to the height of the mobile device 13 and the distance measured by the infrared range finder 12. The position of the coordinates can be directly displayed on the display screen in the form of a simulated turntable 5 and coordinates, so that the position can be more intuitively judged and the angle of the corresponding equipment can be further adjusted until the distance measured by the infrared range finder 12 is much larger than the diameter of the turntable 5, which proves that there is no obstruction between the turntable 5 and the movable mold plate 3, i.e. no friction occurs.

[0034] Optionally, in the above embodiment, if there is friction between the surface of the turntable 5 and the movable mold plate 3, the rough structure between the plates will have a very large friction force. Even if the corresponding sensing device stops the rotation of the turntable 5, the initial friction and the friction caused by inertia will still cause damage to the turntable 5 and the mold. Therefore, an arc-shaped groove 15 is arranged on one side of the turntable 5, and a plurality of rolling balls 16 are arranged in the arc-shaped groove 15. The arc-shaped groove 15 is consistent with the center of the turntable 5 and is arranged between the turntable 5 and the movable mold plate 3. It is worth mentioning that, in the above manner, when friction occurs between the turntable 5 and the movable mold plate 3, it is no longer planar friction, but rolling friction of the rolling balls 16, which can greatly reduce the damage to the turntable 5 caused by friction.

[0035] In the above embodiment, the form of the rolling balls 16 is used to further reduce friction between the turntable 5. However, when the inclination angle of the turntable 5 is large or the rolling balls 16 are stuck, the friction force will still be large. Therefore, a plurality of spring mechanisms 17 are arranged between the movable mold plate 3 and the turntable 5. The spring mechanism 17 includes an adjusting top rod 18, a top block 19, and a spring 20. The upper side of the adjusting top rod 18 is embedded in the spring 20, and the lower side of the top block 19 is embedded in the spring 20. It is worth mentioning that the spring mechanism 17 can provide a deformation distance for the turntable 5, reduce the contact pressure between the turntable 5 and the movable mold plate 3, and further reduce the damage caused by friction. In addition, the height of the spring mechanism 17 at the inclination can also be adjusted to change the inclination angle of the turntable 5, so that the turntable 5 and the movable mold plate 3 are parallel.

[0036] In the above embodiment, the device elements are conventional device elements unless otherwise specified, and the connection methods and control methods are conventional connection methods and control methods unless otherwise specified.

[0037] The application has been described in detail above with reference to the embodiments, but those skilled in the art will understand that various specific parameters in the above embodiments can be changed, forming multiple specific embodiments, all of which are within the common variation range of the application, without departing from the purpose of the application, and therefore will not be described in detail here.

Claims

1. A horizontal rotary two-color injection molding machine for stabilizing switching injection units, comprising two injection units, a fixed mold plate and a movable mold plate, one side of the fixed mold plate being fixedly connected with the injection units, the other side of the fixed mold plate being movably connected with the movable mold plate, and the movable mold plate further being rotationally connected with a rotating disc driven by a rotating motor; characterized in that: a central position of the rotating disc is further provided with an angle detection unit for detecting the rotating angle of the rotating disc, the angle detection unit being electrically connected with a single-chip microcomputer for receiving the detection signal of the angle detection unit, the single-chip microcomputer being electrically connected with the rotating motor for judging whether the angle signal detected by the angle detection unit meets a specified angle, thereby controlling the on-off of the rotating motor; the single-chip microcomputer is further electrically connected with a temperature detection unit and a dust cleaning device, the temperature detection unit being arranged on the upper surface of the movable mold plate, and the dust cleaning device being arranged between the rotating disc and the movable mold plate, the single-chip microcomputer being used for judging whether the temperature detected by the temperature detection unit reaches a threshold value, thereby controlling the dust cleaning device to clean between the rotating disc and the movable mold plate. the single-chip microcomputer is further electrically connected with an alarm device, which alarms when the rotating motor stops rotating.

2. The dual color injection molding machine of claim 1, wherein, the single-chip microcomputer is further electrically connected with an infrared sensing unit, which is arranged between the movable mold plate and the rotating disc for sensing the distance of the rubbing position.

3. The dual color injection molding machine of claim 1, wherein, the infrared sensing unit comprises an infrared range finder and a moving device, the infrared range finder being fixed on the moving device, and the moving device moving up and down on one side of the rotating disc for sensing the position of the rubbing position.

4. The dual color injection molding machine of claim 3, wherein, the moving device and the infrared range finder are electrically connected with the single-chip microcomputer, and the single-chip microcomputer is electrically connected with a display unit, the display unit being used for displaying the position of the rubbing position.

5. The dual color injection molding machine of claim 4, wherein, one side of the rotating disc is provided with an arc-shaped groove, the arc-shaped groove being provided with a plurality of rolling balls, the arc-shaped groove being consistent with the center of the rotating disc and being arranged between the rotating disc and the movable mold plate.

6. The dual color injection molding machine of claim 1, wherein, a plurality of spring mechanisms are arranged between the movable mold plate and the rotating disc, the spring mechanisms comprising an adjusting top rod, a top block and a spring, the upper side of the adjusting top rod being embedded in the spring, and the lower side of the top block being embedded in the spring.

7. The dual color injection molding machine of claim 1, wherein, ​

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