Injection mold for plastic

Abstract

The utility model discloses an injection mold for plastics, which belongs to the technical field of injection molds and comprises a shell, a group of infrared heating lamp tubes are fixedly connected to the inner top wall of the shell, a connecting shell is fixedly connected to the inner side wall of the shell, and a group of vortex tubes are fixedly mounted at the bottom end of the connecting shell. An infrared temperature sensor is fixedly installed on the inner side wall of the shell, a hopper is fixedly connected to the upper surface of the shell, the temperature of the first mold and the temperature of the second mold are detected through the infrared temperature sensor, and when the temperature of the molds is too low, infrared heating lamp tubes are used for irradiating the molds to heat the molds; when the temperature of the mold is too high, an air compressor is matched with a vortex tube to blow cold air to the mold to cool the mold, so that the phenomena of flash and the like of the part of the plastic product caused by the too high temperature of the mold are prevented, and the qualification rate of the product is improved; and the waste of materials is reduced.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to an injection mold for plastics. Background Art

[0002] With the development of the times, plastic items have been integrated into our lives. Plastic items are made by using injection molds. Under high temperature, the plastic material is injected into the mold. Through the shape and structure of the mold, the plastic material is cooled and solidified to form a finished product of the desired shape.

[0003] Currently, when using an injection molding machine, if the mold temperature is too low, it will cause unfilled areas and voids to appear on the surface of some plastic products. When the mold is in contact with high-temperature materials for a long time, the mold temperature will be too high, causing flash and other phenomena on the product, affecting the product qualification rate and wasting a large amount of material. Therefore, those skilled in the art provide an injection mold for plastics to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the present invention is to provide an injection mold for plastics to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A plastic injection mold comprises a shell, an inner top wall of the shell is fixedly connected to a group of infrared heating lamps, an inner side wall of the shell is fixedly connected to a connecting shell, a group of vortex tubes are fixedly installed on the bottom end of the connecting shell, an infrared temperature sensor is fixedly installed on the inner side wall of the shell, a hopper is fixedly connected to the upper surface of the shell, two detection ports are provided on the outer surface of the hopper, a photoelectric sensor is fixedly installed on the inner wall of the shell, the bottom end of the hopper is fixedly connected to a barrel, the outer surface of the barrel is provided with an electromagnetic heater, the inner side wall of the connecting shell is fixedly connected to a first mold, four hydraulic telescopic rods are fixedly connected to the inner side wall of the shell, one end of each hydraulic telescopic rod is fixedly connected to the second mold, a push rod is fixedly connected to the inner side wall of the shell, a first frame is provided inside the shell, a motor is fixedly installed on the upper surface of the first frame, a bearing is fixedly connected to the right side of the barrel, the output end of the motor passes through the inner ring of the bearing and is fixedly connected to a screw, and a spring is fixedly connected to the outer surface of each hydraulic telescopic rod.

[0007] As a further solution of the present invention: cooling holes are provided on the outer surfaces of the first mold and the second mold, and a water cooler is fixedly installed on the inner bottom wall of the shell.

[0008] As a further solution of the present invention: four air outlets are provided at the bottom end of the shell, and the outer surface of the barrel is fixedly connected to a second frame.

[0009] As a further solution of the present invention: an air compressor is fixedly mounted on the inner bottom wall of the housing, and the output end of the air compressor is connected to the input end of each vortex tube through an air pipe.

[0010] As a further solution of the present invention: a hydraulic pump is fixedly installed on the left side of the shell, and a discharge net is fixedly connected to the inner side wall of the shell.

[0011] As a further solution of the present invention: four legs are fixedly connected to the bottom end of the shell, and a pad is fixedly connected to the bottom end of each group of legs.

[0012] As a further solution of the present invention: a control panel is fixedly mounted on the outer surface of the housing.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] This plastic injection mold uses an infrared temperature sensor to detect the temperatures of the first mold and the second mold. When the mold temperature is too low, an infrared heating lamp is used to irradiate the mold to heat the mold, preventing the low mold temperature from causing unfilled areas and voids on the surface of some plastic products. When the mold temperature is too high, an air compressor is used in conjunction with an eddy current tube to blow cold air to the mold to cool the mold, preventing the high mold temperature from causing flash and other phenomena on some plastic products. This improves the product qualification rate and reduces material waste. The photoelectric sensor monitors the amount of plastic particles in the hopper and issues an alarm when the amount is insufficient to prevent the machine from idling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front view of an injection mold for plastic;

[0016] Figure 2 A cross-sectional view of a front view of an injection mold for plastics;

[0017] Figure 3 A cross-sectional view of a top view of an injection mold for plastics;

[0018] Figure 4 A cross-sectional view of a side view of an injection mold for plastic.

[0019] In the figure: 1. Housing; 2. Infrared heating lamp; 3. Vortex tube; 4. Hopper; 5. Detection port; 6. Barrel; 7. Electromagnetic heater; 8. Photoelectric sensor; 9. First mold; 10. Second mold; 11. Hydraulic telescopic rod; 12. Push rod; 13. First frame; 14. Motor; 15. Bearing; 16. Second frame; 17. Screw; 18. Infrared temperature sensor; 19. Spring; 20. Hydraulic pump; 21. Air compressor; 22. Cooling port; 23. Water cooler; 24. Discharge net; 25. Support leg; 26. Pad; 27. Control panel; 28. Air outlet; 29. ​​Connecting shell. DETAILED DESCRIPTION

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0022] See also Figures 1 to 4In an embodiment of the present invention, a plastic injection mold includes a shell 1. A group of infrared heating lamps 2 are fixedly connected to the inner top wall of the shell 1. The tungsten filaments in the infrared heating lamps 2 generate heat under the action of an AC voltage and heat the gas in the quartz tube, thereby generating infrared radiation. This radiation can be absorbed by an object, causing the molecules inside the object to activate and produce collision motion, thereby generating heat and heating the object. The inner side wall of the shell 1 is fixedly connected to a connecting shell 29. A group of vortex tubes 3 are fixedly installed at the bottom end of the connecting shell 29. Compressed air is injected into the vortex tubes 3 from a tangential direction to form a free vortex. The angular velocity of the free vortex increases the closer to the center. Due to the different angular velocities, friction is generated between the layers of the free vortex, causing the air temperature in the inner layer to decrease and the air temperature in the outer layer to increase. Finally, the cold air flows back along the center of the vortex to form a cooling source. An infrared temperature sensor 18 is fixedly installed on the inner wall of the shell 1. When the infrared radiation energy of the object is irradiated on the detector of the infrared temperature sensor 18, the detector will be affected by a certain amount of heat and produce a small voltage change. By measuring the voltage change, the change in the object's temperature can be obtained. A hopper 4 is fixedly connected to the upper surface of the shell 1. Two detection ports 5 are provided on the outer surface of the hopper 4. A photoelectric sensor 8 is fixedly installed on the inner wall of the shell 1. The electrical sensor 8 is divided into a transmitter and a receiver. By placing the transmitter and the receiver on both sides of the object, the transmitter emits a visible light or infrared beam, which passes through the object to be measured and reaches the receiver. When the object to be measured appears, it will block the beam, thereby reducing the light intensity in the receiver. By measuring the change in light intensity in the receiver, it is determined whether the target object exists and its position, shape and other information. The bottom end of the hopper 4 is fixedly connected to the barrel 6. The outer surface of the barrel 6 is provided with an electromagnetic heater 7. The electromagnetic heater 7 generates eddy currents inside the metal through electromagnetic induction, and relies on the heat generated by the eddy currents to heat the object. The inner wall of the connecting shell 29 is fixedly connected to the first mold 9. Four hydraulic telescopic rods 11 are fixedly connected to the inner wall of the shell 1, and one end of each hydraulic telescopic rod 11 is fixedly connected to the second mold 10. A push rod 12 is fixedly connected to the inner wall of the shell 1. A first frame 13 is provided inside the shell 1, and a motor 14 is fixedly installed on the upper surface of the first frame 13. A bearing 15 is fixedly connected to the right side of the barrel 6. The output end of the motor 14 passes through the inner ring of the bearing 15 and is fixedly connected to a screw 17. The outer surface of each hydraulic telescopic rod 11 is fixedly connected to a spring 19. The mold is monitored by the cooperation of the infrared heating lamp 2, the vortex tube 3 and the infrared temperature sensor 18, and the temperature of the mold is controlled within a certain range.

[0023] The outer surface of the first mold 9 and the outer surface of the second mold 10 are both provided with cooling ports 22. A water cooler 23 is fixedly installed on the inner bottom wall of the shell 1. The compressor in the water cooler 23 sucks in low-temperature, low-pressure refrigerant gas and compresses it into high-temperature, high-pressure gas. Subsequently, the high-temperature, high-pressure refrigerant gas enters the condenser, where it exchanges heat with the external cooling water and is condensed into a high-pressure liquid. In this process, the heat released by the refrigerant is absorbed and taken away by the cooling water. The high-pressure liquid refrigerant is throttled by the expansion valve to reduce its pressure and temperature and become a low-temperature, low-pressure refrigerant. Finally, the low-temperature, low-pressure refrigerant enters the condenser. The refrigerant enters the evaporator, exchanges heat with the cooled medium in the evaporator, absorbs its heat and vaporizes, and the temperature of the cooled medium is reduced, thereby achieving a refrigeration effect. The vaporized refrigerant returns to the compressor again, and a new round of circulation begins. The output end of the water cooler 23 is connected to the water cooler 23 through a water pipe. Four air outlets 28 are provided at the bottom end of the shell 1. The outer surface of the barrel 6 is fixedly connected to the second frame 16. The inner bottom wall of the shell 1 is fixedly installed with an air compressor 21. The output end of the air compressor 21 is connected to the input end of each vortex tube 3 through an air pipe. The melted plastic is shaped through the cooperation of the cooling port 22 and the water cooler 23.

[0024] A hydraulic pump 20 is fixedly installed on the left side of the shell 1, a discharge net 24 is fixedly connected to the inner wall of the shell 1, four legs 25 are fixedly connected to the bottom end of the shell 1, and a pad 26 is fixedly connected to the bottom end of each set of legs 25. A control panel 27 is fixedly installed on the outer surface of the shell 1. The finished product is slid out of the device by setting the discharge net 24 to prevent the finished product from piling up. The device is lifted by the cooperation of the legs 25 and the pad 26, making it more convenient for workers to work.

[0025] The working principle of the present invention is as follows: plastic particles are poured into the hopper 4, the motor 14 drives the screw 17 to rotate to transport the plastic particles out, the plastic particles are melted by the electromagnetic heater 7, the infrared temperature sensor 18 is used to detect the temperature of the first mold 9 and the second mold 10, when the mold temperature is too low, the infrared heating lamp 2 is used to irradiate the mold for heating, when the mold temperature is too high, the air compressor 21 is used to compress the air and send it into the vortex tube 3, the vortex tube 3 blows cold air to the mold to cool it down, the melted plastic particles are squeezed into the mold by the rotation of the screw 17, the water cooler 23 is used to send cold water into the cooling port 22, so that the melted plastic particles are shaped, the hydraulic telescopic rod 11 is contracted by the hydraulic pump 20, the push rod 12 is extended to demould the finished product and slide it out along the discharge net 24, the number of plastic particles in the hopper 4 is monitored by the photoelectric sensor 8, and an alarm is issued when the number is insufficient.

[0026] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can make equivalent replacements or changes according to the technical solution and the utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be included in the scope of protection of the present invention. For those skilled in the art, it is obvious 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 appended claims rather than the above description, and it is intended that all changes that fall 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.

[0027] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method 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 can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An injection mold for plastic, comprising a housing (1), characterized in that: The inner top wall of the shell (1) is fixedly connected to a group of infrared heating lamps (2), the inner side wall of the shell (1) is fixedly connected to a connecting shell (29), the bottom end of the connecting shell (29) is fixedly installed with a group of vortex tubes (3), the inner side wall of the shell (1) is fixedly installed with an infrared temperature sensor (18), the upper surface of the shell (1) is fixedly connected to a hopper (4), the outer surface of the hopper (4) is provided with two detection ports (5), the inner wall of the shell (1) is fixedly installed with a photoelectric sensor (8), the bottom end of the hopper (4) is fixedly connected to a barrel (6), the outer surface of the barrel (6) is provided with an electromagnetic heater (7), the inner side wall of the connecting shell (29) is fixedly connected to a connecting shell (29), the inner side wall of the connecting shell (29) is fixedly connected to a connecting shell (29), the inner side wall of the connecting shell (29) is fixedly connected to a connecting shell (4), the outer surface of the connecting shell (4) is provided with an electromagnetic heater (7), the inner side wall of the connecting shell (29) is fixedly connected to a connecting shell (4), the inner side wall of the connecting shell (29) is fixedly connected to a connecting shell (4), the inner side wall of the connecting shell (29) is fixedly connected to a connecting shell (4), the inner side wall of the connecting shell (29) is fixedly connected to a connecting shell (6), the inner side wall of the connecting shell (29) is fixedly connected to a connecting shell (6), the inner side wall of the connecting shell (29) is fixedly connected to a connecting shell (29), the inner side wall of the connecting shell (29) is fixedly connected to a connecting shell (4), the inner side wall of the connecting shell (29) is fixedly connected to a connecting shell (4), the inner side wall of the connecting shell (29) is fixedly connected to a connecting shell (4), the inner side wall of the connecting shell (29) is fixedly connected to a A first mold (9) is fixedly connected to the inner wall of the shell (1), four hydraulic telescopic rods (11) are fixedly connected, one end of each hydraulic telescopic rod (11) is fixedly connected to the second mold (10), the inner wall of the shell (1) is fixedly connected to a push rod (12), a first frame (13) is provided inside the shell (1), a motor (14) is fixedly installed on the upper surface of the first frame (13), a bearing (15) is fixedly connected to the right side of the barrel (6), the output end of the motor (14) passes through the inner ring of the bearing (15) and is fixedly connected to a screw (17), and a spring (19) is fixedly connected to the outer surface of each hydraulic telescopic rod (11).

2. The plastic injection mold according to claim 1, characterized in that: The outer surface of the first mold (9) and the outer surface of the second mold (10) are both provided with cooling ports (22), and a water cooler (23) is fixedly mounted on the inner bottom wall of the shell (1).

3. The plastic injection mold according to claim 1, characterized in that: Four air outlets (28) are provided at the bottom end of the shell (1), and the outer surface of the barrel (6) is fixedly connected to a second frame (16).

4. The plastic injection mold according to claim 1, characterized in that: An air compressor (21) is fixedly mounted on the inner bottom wall of the housing (1), and the output end of the air compressor (21) is connected to the input end of each vortex tube (3) through an air pipe.

5. The plastic injection mold according to claim 1, characterized in that: A hydraulic pump (20) is fixedly mounted on the left side of the housing (1), and a discharge net (24) is fixedly connected to the inner side wall of the housing (1).

6. The plastic injection mold according to claim 1, characterized in that: Four supporting legs (25) are fixedly connected to the bottom end of the housing (1), and a cushion block (26) is fixedly connected to the bottom end of each group of supporting legs (25).

7. The plastic injection mold according to claim 1, characterized in that: A control panel (27) is fixedly mounted on the outer surface of the housing (1).

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