A device for measuring the inner diameter of a heater

Abstract

The invention discloses a heater inner diameter measuring device, which relates to the technical field of hot runner molds, and includes a heater assembly, a step rod, a mandrel, a support assembly and a controller; the support assembly includes a base and a support frame, the support frame is arranged on both sides of the upper end of the base, one side of the support frame is fixedly connected to one end of the step rod, the other side of the support frame is fixedly connected to one end of the mandrel, the other end of the step rod is matched with the other end of the mandrel, the outer diameter of the step rod and the mandrel are equal, the outer diameter of the step rod gradually increases along the side away from the mandrel, and the side of the support frame close to the step rod is provided with a distance measuring device; the heater assembly includes a heater, a slider, a guide rail and a connector, the heater is sleeved on the outside of the mandrel, the slider is slidably connected to the guide rail, a motor is arranged on the slider, the two ends of the guide rail are respectively connected to the support frames on both sides, the heater and the slider are connected by a connector, and a deformation sensor is arranged at the connection between the heater and the connector. The technical effect of the invention is that it can measure the inner diameter of the heater when heating, and the measurement accuracy is high.

Description

Technical Field

[0001] The invention relates to the technical field of hot runner moulds, and in particular to a heater inner diameter measuring device. Background Art

[0002] Hot runner molds are molds that use heating devices to keep the melt in the runner from solidifying. Because they have a shorter molding cycle than traditional molds and save more raw materials, hot runner molds are widely used in industrially developed countries and regions around the world today.

[0003] The heater and nozzle are important components of the hot runner mold. When heated, the heater will expand and the inner diameter will change, which will affect the nozzle inside the heater. In addition, due to the high temperature of the heater when heated, the measurement accuracy of the relevant inner diameter measurement tools is low, so it is not easy to choose a heater and nozzle with the appropriate inner diameter. Summary of the invention

[0004] 1. Technical problem to be solved by the invention

[0005] In view of the technical problem that the inner diameter measurement accuracy of a heater is low when it is heated, the present invention provides a heater inner diameter testing device, which can measure the inner diameter of the heater when it is heated with high measurement accuracy.

[0006] 2. Technical solution

[0007] To solve the above problems, the technical solution provided by the present invention is:

[0008] A heater inner diameter measuring device comprises a heater assembly, a step rod, a core rod, a support assembly and a controller;

[0009] The support assembly includes a base and a support frame, the support frame is arranged on both sides of the upper end of the base, the support frame on one side is fixedly connected to one end of the step rod, and the support frame on the other side is fixedly connected to one end of the core rod, the other end of the step rod is matched with the other end of the core rod, the outer diameters of the step rod and the core rod at the connection are equal, the outer diameter of the step rod gradually increases along the side away from the core rod, and a distance measuring device is provided on the side of the support frame close to the step rod;

[0010] The heater assembly comprises a heater, a slider, a guide rail and a connecting piece, the heater is sleeved on the outside of the mandrel, the slider is slidably connected to the guide rail, a motor is provided on the slider, two ends of the guide rail are respectively connected to the support frames on both sides, the heater and the slider are connected through the connecting piece, and a deformation sensor is provided at the connection between the heater and the connecting piece;

[0011] The controller is connected to the distance measuring device, the heater, the motor and the deformation sensor.

[0012] Optionally, the support frame and the step rod are fixedly connected via a locking nut.

[0013] Optionally, a sleeve is provided at the connection between the support frame and the core rod, the sleeve and the support frame are fixedly connected by a locking nut, the sleeve is sleeved on the outside of the core rod, and a screw for controlling the sliding of the core rod is provided on the outside of the sleeve.

[0014] Optionally, a protrusion is provided at one end of the step rod, and a groove is provided at one end of the core rod, and the protrusion of the step rod and the groove of the core rod are cooperatively connected.

[0015] Optionally, a pipe for the inlet and outlet of cooling water is provided inside the stepped rod, and a water temperature sensor and a water pressure sensor are provided on the pipe.

[0016] Optionally, the water temperature sensor and the water pressure sensor are both connected to the controller.

[0017] Optionally, the distance measuring device is a laser detector or an infrared sensor.

[0018] Optionally, a heat insulating layer is provided on the outer side of the heater, and the material of the heat insulating layer is glass fiber or asbestos.

[0019] Optionally, the controller includes a switch, a water temperature component, a water pressure component, a movement speed component, a temperature component, a distance component and an inner diameter component, the water temperature component is connected to the water temperature sensor, the water pressure component is connected to the water pressure sensor, the movement speed component is connected to the motor, the temperature component is connected to the heater, the distance component is connected to the distance measuring device, and the inner diameter component is connected to the deformation sensor.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: it can measure the inner diameter of the heater when it is heated, and the measurement accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a main body of a heater inner diameter measuring device proposed in an embodiment of the present invention;

[0023] Figure 2 A schematic structural diagram of a controller of a heater inner diameter measuring device proposed in an embodiment of the present invention.

[0024] In the figure: 1. heater assembly; 101. heater; 102. slider; 103. guide rail; 104. connector; 105. deformation sensor; 2. step rod; 3. core rod; 4. support assembly; 41. base; 42. support frame; 5. controller; 51. switch; 52. water pressure assembly; 53. water temperature assembly; 54. speed assembly; 55. temperature assembly; 56. distance assembly; 57. inner diameter assembly; 6. distance measuring device; 7. sleeve; 8. screw; 9. pipe. DETAILED DESCRIPTION

[0025] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0026] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the invention are shown in the accompanying drawings. The words "first", "second", etc. described in the present invention are set for the convenience of describing the technical solution of the present invention, and have no specific limiting effect. They are all general references and do not constitute a limiting effect on the technical solution of the present invention. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Specific embodiments

[0028] Combined with Figure 1-2 , the present invention provides a heater inner diameter measuring device, comprising a heater assembly 1, a step rod 2, a core rod 3, a support assembly 4 and a controller 5;

[0029] The support assembly 4 includes a base 41 and a support frame 42. The support frame 42 is arranged on both sides of the upper end of the base 41. The support frame 42 on one side is fixedly connected to one end of the step rod 2, and the support frame 42 on the other side is fixedly connected to one end of the core rod 3. The other end of the step rod 2 is matched with the other end of the core rod 3. The outer diameters of the step rod 2 and the core rod 3 are equal at the connection. The outer diameter of the step rod 2 gradually increases along the side away from the core rod 3. A distance measuring device 6 is provided on the side of the support frame 42 close to the step rod 2.

[0030] The heater assembly 1 includes a heater 101, a slider 102, a guide rail 103 and a connector 104. The heater 101 is sleeved on the outside of the core rod 3. The slider 102 and the guide rail 103 are slidably connected. A motor is provided on the slider 102. Both ends of the guide rail 103 are respectively connected to the support frames 42 on both sides. The heater 101 and the slider 102 are connected by the connector 104. A deformation sensor 105 is provided at the connection between the heater 101 and the connector 104.

[0031] The controller 5 is connected to the distance measuring device 6 , the heater 101 , the motor, and the deformation sensor 105 .

[0032] In specific applications, the controller 5 sets the temperature and heats the heater 101 to reach the set temperature. Next, the controller 5 controls the motor to make the slider 102 slide on the guide rail 103. The slider 102 drives the heater 101 through the connecting piece 104 to make the heater 101 slide on the core rod 3. As the slider 102 continues to slide, the heater 101 slides onto the step rod 2. Since the outer diameter of the step rod 2 gradually increases, when the heater 101 slides on the step rod 2 for a distance, the inner side of the heater 101 and the outer side of the step rod 2 are in close contact (to improve measurement accuracy), and the heater 101 is deformed. At this time, the deformation sensor 105 located on the heater 101 transmits a signal to the controller 5. The controller 5 immediately turns off the motor to make the heater 101 stop. At the same time, the distance testing device measures the position of the heater 101 on the step rod 2 at this time, and transmits the signal to the controller 5. The controller 5 obtains the outer diameter of the step rod 2 at this time based on the position of the heater 101 on the step rod 2, that is, the inner diameter of the heater 101 at this time. After the heater 101 stays for 2 seconds, the controller 5 immediately turns on the motor to return the heater 101 to the core rod 3.

[0033] Specifically, in order to ensure reliable connection and facilitate assembly and disassembly, the support frame 42 and the step rod 2 are fixedly connected by a locking nut, and the appropriate step rod 2 can be replaced at any time according to the size of the inner diameter of the heater 101 to be tested.

[0034] Specifically, a sleeve 7 is provided at the connection between the support frame 42 and the core rod 3. The sleeve 7 and the support frame 42 are fixedly connected by a locking nut. The sleeve 7 is sleeved on the outside of the core rod 3. A screw 8 for controlling the sliding of the core rod 3 is provided on the outside of the sleeve 7. The core rod 3 can slide freely inside the sleeve 7. When testing, tighten the screw 8. When it is necessary to replace the appropriate core rod 3, loosen the screw 8.

[0035] Specifically, in order to ensure that the step rod 2 and the core rod 3 are tightly connected, a protrusion is provided at one end of the step rod 2, and a groove is provided at one end of the core rod 3, and the protrusion of the step rod 2 and the groove of the core rod 3 are matched and connected.

[0036] Specifically, in order to prevent the temperature of the step rod 2 from being too high and affecting the measurement accuracy, a pipe 9 for the inlet and outlet of cooling water is provided inside the step rod 2 to cool the step rod 2. A water temperature sensor and a water pressure sensor are provided on the pipe 9 to detect the water temperature and water pressure of the cooling water at any time.

[0037] Specifically, in order to detect and display the water temperature and water pressure of the cooling water at any time, a water temperature sensor and a water pressure sensor are both connected to the controller 5 .

[0038] Specifically, the distance measuring device 6 is a laser detector or an infrared sensor, and a suitable distance measuring device 6 can be selected according to actual measurement requirements.

[0039] Specifically, in order to reduce the heat loss of the heater 101 and improve the measurement accuracy, a heat insulation layer is provided on the outside of the heater 101, and the material of the heat insulation layer is glass fiber or asbestos.

[0040] Specifically, the controller 5 includes a switch 51, a water temperature component 53, a water pressure component 52, a speed component 54, a temperature component 55, a distance component 56, and an inner diameter component 57. The water temperature component 53 is connected to the water temperature sensor, the water pressure component 52 is connected to the water pressure sensor, the speed component 54 is connected to the motor, the temperature component 55 is connected to the heater 101, the distance component 56 is connected to the distance measuring device 6, and the inner diameter component 57 is connected to the deformation sensor 105. The controller 5 includes a switch 51, a water temperature component 53, a water pressure component 52, a speed component 54, a temperature component 55, a distance component 56, and an inner diameter component 57. The switch 51 controls the opening and closing of the entire device; the water temperature component 53 is connected to the water temperature sensor to measure and display the changes in the cooling water temperature; the water pressure component 52 is connected to the water pressure sensor to measure and display the changes in the cooling water pressure; the speed component 54 is connected to the motor, wherein the speed component 54 can both adjust the speed of the motor and measure and display the speed of the motor; the temperature component 55 is connected to the heater 101, wherein the temperature component 55 can both set the temperature and measure and display the temperature to ensure that the heater 101 is maintained at the set temperature at all times; the distance component 56 is connected to the distance measuring device 6 to measure and display the distance, and the inner diameter component 57 is connected to the deformation sensor 105 to measure and display the inner diameter.

[0041] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A heater inner diameter measuring device, characterized in that: It includes a heater assembly, a step rod, a core rod, a support assembly, and a controller; The support assembly includes a base and a support frame, the support frame is arranged on both sides of the upper end of the base, the support frame on one side is fixedly connected to one end of the step rod, and the support frame on the other side is fixedly connected to one end of the core rod, the other end of the step rod is matched with the other end of the core rod, the outer diameters of the step rod and the core rod at the connection are equal, the outer diameter of the step rod gradually increases along the side away from the core rod, and a distance measuring device is provided on the side of the support frame close to the step rod; The heater assembly comprises a heater, a slider, a guide rail and a connecting piece, the heater is sleeved on the outside of the mandrel, the slider is slidably connected to the guide rail, a motor is provided on the slider, two ends of the guide rail are respectively connected to the support frames on both sides, the heater and the slider are connected through the connecting piece, and a deformation sensor is provided at the connection between the heater and the connecting piece; The controller is connected to the distance measuring device, the heater, the motor and the deformation sensor.

2. A heater inner diameter measuring device according to claim 1, characterized in that: The support frame and the step rod are fixedly connected via a locking nut.

3. A heater inner diameter measuring device according to claim 1, characterized in that: A sleeve is provided at the connection between the support frame and the core rod. The sleeve and the support frame are fixedly connected via a locking nut. The sleeve is sleeved on the outside of the core rod. A screw for controlling the sliding of the core rod is provided on the outside of the sleeve.

4. A heater inner diameter measuring device according to claim 1, characterized in that: A protrusion is provided at one end of the step rod, and a groove is provided at one end of the core rod. The protrusion of the step rod and the groove of the core rod are matched and connected.

5. The heater inner diameter measuring device according to claim 1, characterized in that: A pipeline for the inflow and outflow of cooling water is arranged inside the stepped rod, and a water temperature sensor and a water pressure sensor are arranged on the pipeline.

6. A heater inner diameter measuring device according to claim 5, characterized in that: The water temperature sensor and the water pressure sensor are both connected to the controller.

7. A heater inner diameter measuring device according to claim 1, characterized in that: The distance measuring device is a laser detector or an infrared sensor.

8. The heater inner diameter measuring device according to claim 1, characterized in that: A heat insulating layer is arranged on the outer side of the heater, and the material of the heat insulating layer is glass fiber or asbestos.

9. The heater inner diameter measuring device according to claim 1, characterized in that: The controller includes a switch, a water temperature component, a water pressure component, a speed component, a temperature component, a distance component and an inner diameter component. The water temperature component is connected to a water temperature sensor disposed inside the step rod, the water pressure component is connected to a water pressure sensor disposed inside the step rod, the speed component is connected to the motor, the temperature component is connected to the heater, the distance component is connected to the distance measuring device, and the inner diameter component is connected to the deformation sensor.

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