An injection molding machine nozzle capable of intelligent temperature control

Abstract

The present invention discloses an injection molding machine nozzle capable of intelligent temperature control, which belongs to the technical field of injection molding machines, and includes a nozzle body, a water cooling chamber arranged outside the nozzle body for cooling the nozzle body, a tapered material flow channel formed on the inner side of the nozzle body, and the diameter of the material flow channel gradually increases from the inlet to the outlet of the nozzle body, and a tapered water cooling flow channel formed on the inner side of the water cooling chamber, and the diameter of the water cooling flow channel gradually increases from the inlet to the outlet of the nozzle body; the water cooling chamber includes an outer shell and a ring plate arranged inside the outer shell, a float is arranged in the material flow channel, the float is fixedly connected to the slider through a rod, the side of the slider is fixedly connected to the ring plate through a connecting rod, and the outer wall of the nozzle body is provided with a slide groove for the connecting rod to pass through; material passages connected to the material flow channel are arranged at both ends of the slider. The device of the present invention can adaptively adjust the cooling demand according to the flow conditions of the nozzle to better meet the injection molding needs of modern injection molding machines.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding machines, and in particular relates to an injection molding machine nozzle capable of intelligent temperature control. Background Art

[0002] During ultra-high-speed injection molding, the molten material is subjected to high shear in the injection nozzle, which will generate a large amount of heat, causing the temperature to rise sharply. It is easy for the molten material to burn, and sometimes even cause the molten material to decompose. If the molten material temperature is too high, a large temperature gradient will be formed when cooling during injection molding, resulting in thermal internal stress, which affects the quality of the injection molded product. Therefore, the temperature of the molten material at the nozzle needs to be controlled during injection molding.

[0003] The patent application with publication number CN114905701A discloses a temperature control nozzle for ultra-high-speed injection molding machines, which provides feedback by setting a temperature sensor to ensure heat balance at the nozzle. However, in the actual production process, for the water cooling requirement, only providing feedback on temperature can easily cause feedback lag, inaccurate accuracy and other problems, which can no longer meet the temperature control requirements of ultra-high-speed injection molding machines. Summary of the invention

[0004] In view of this, the object of the present invention is to provide an injection molding machine nozzle with intelligent temperature control, which can adaptively adjust the cooling demand according to the flow rate of the nozzle to better meet the injection molding needs of modern injection molding machines.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention discloses an injection molding machine nozzle with intelligent temperature control, comprising a nozzle body, a water-cooling chamber arranged outside the nozzle body for cooling the nozzle body, a tapered material flow channel is formed on the inner side of the nozzle body, and the diameter of the material flow channel gradually increases from the inlet to the outlet of the nozzle body, and a tapered water-cooling flow channel is formed on the inner side of the water-cooling chamber, and the diameter of the water-cooling flow channel gradually increases from the inlet to the outlet of the nozzle body; the water-cooling chamber comprises an outer shell and a ring plate arranged in the outer shell, a float is arranged in the material flow channel, the float is fixedly connected to a slider through a rod, the slider sliding seal is arranged at the inlet of the nozzle body, the slider can slide along the axial direction of the nozzle body, the side of the slider is fixedly connected to the ring plate through a connecting rod, and the outer wall of the nozzle body is provided with a slide groove for the connecting rod to pass through; material through pipes connecting the material flow channel are arranged at both ends of the slider.

[0007] Furthermore, a connecting groove is formed on the outer end surface of the slider, a penetrating mounting hole is opened at the bottom of the connecting groove, a sliding hole for a material passage pipe to pass through is formed at the inlet end of the nozzle body, one end of the material passage pipe is fixed in the mounting hole, and the other end of the material passage pipe extends into the material flow channel.

[0008] Furthermore, an annular flange is formed at the upper end of the material passage pipe, and the diameter of the annular flange is greater than the diameter of the sliding hole.

[0009] Furthermore, a guide rod is arranged at the center of the material flow channel, and the guide rod is arranged along the axial direction of the material flow channel. The upper end of the guide rod is fixedly connected to the nozzle body, and the lower end of the guide rod can be slidably inserted into the float and the support rod.

[0010] Furthermore, a spring is sleeved on the outer side of the support rod, and two ends of the spring are fixedly connected to the float and the nozzle body respectively.

[0011] Furthermore, a plurality of grooves are evenly arranged on the surface of the float.

[0012] Furthermore, a water inlet and a water outlet are respectively provided at both ends of the water cooling chamber, the water inlet is connected to a water inlet pipe, and the water outlet is connected to a water outlet pipe; the water inlet pipe is connected to a bracket, the water inlet pipe is a flexible pipe, and the bracket includes a first connecting rod, a first clamping groove, a second connecting rod and a second clamping groove, one end of the first connecting rod is fixedly connected to the first clamping groove, and the other end is hinged to the second connecting rod in a triangle shape, the first connecting rod and the second connecting rod can be fastened by fasteners, and the second connecting rod is fixedly connected to the second clamping groove at one end away from the first connecting rod, and the first clamping groove and the second clamping groove are respectively used to clamp the water inlet pipe.

[0013] Furthermore, the water cooling chambers are arranged in a plurality of groups along the axial direction of the nozzle body, and the ring plates of the water cooling chambers are connected by axial rods, and the axial rods are slidably sealed with the outer shell of the water cooling chambers.

[0014] The beneficial effects of the present invention are:

[0015] The present invention discloses an injection molding machine nozzle capable of intelligent temperature control, which is water-cooled by arranging a water cooling chamber outside the nozzle body. A floating ball is arranged, and the greater the flow rate of the material, the farther the floating ball is from the inlet of the nozzle body. The floating ball is displaced under the action of the material flow rate, and the sliding block and the ring plate are displaced by the support rod. Since the ring plate can be displaced together with the floating ball, the flow rate of the material is positively correlated with the flow rate of the coolant, so that the liquid replacement speed of the coolant is adaptively changed according to the material flow rate, and the temperature can be lowered better and more accurately.

[0016] In the device of the present invention, through the linkage between the float and the ring plate, the coolant flow in the water cooling chamber is feedback-regulated through the material flow. The feedback is more direct and the control is simple, which can better meet the injection molding requirements of modern injection molding machines.

[0017] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0019] Figure 1 The structure of the device of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 2 The structure of the device of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 3 is a cross-sectional view of the device of the present invention;

[0022] Figure 4 for Figure 3 A magnified view at point A;

[0023] Figure 5 A schematic diagram of the structure of the bracket.

[0024] The markings in the accompanying drawings are as follows: nozzle body 1, water cooling chamber 2, material flow channel 3, water cooling flow channel 4, outer shell 5, ring plate 6, float 7, support rod 8, slider 9, connecting rod 10, slide groove 11, material passage pipe 12, connecting groove 13, mounting hole 14, slide hole 15, annular flange 16, guide rod 17, spring 18, water inlet 19, water outlet 20, water inlet pipe 21, bracket 22, first connecting rod 23, first clamping groove 24, second connecting rod 25, second clamping groove 26, axial rod 27, water outlet pipe 28. DETAILED DESCRIPTION

[0025] like Figures 1 to 5 As shown, the present invention is an injection molding machine nozzle with intelligent temperature control, including a nozzle body 1 and a water cooling chamber 2 arranged outside the nozzle body 1 for cooling the nozzle body. The nozzle body 1 is in the shape of a long cylinder, and the water cooling chamber 2 covers the outer surface of the nozzle body 1, and the interior can be cooled by filling with coolant.

[0026] Specifically, a tapered material flow channel 3 is formed inside the nozzle body 1, and the diameter of the material flow channel 3 gradually increases from the inlet to the outlet of the nozzle body 1. The size change direction of the tapered shape is the same as that of the water-cooling flow channel 4. A tapered water-cooling flow channel 4 is formed inside the water-cooling chamber 2, and the diameter of the water-cooling flow channel 4 gradually increases from the inlet to the outlet of the nozzle body 1. The water-cooling chamber 2 includes an outer shell 5 and a ring plate 6 disposed inside the outer shell 5, and the outer shell 5 is also cylindrical. A floating ball 7 is disposed inside the material flow channel 3 inside the nozzle body 1, and the diameter of the floating ball 7 is equivalent to the inner diameter of the small end of the material channel.

[0027] The float 7 is fixedly connected to the slider 9 through a support rod 8. The inside of the support rod 8 is hollow and its length direction is along the axial direction of the nozzle body 1. The support rod 8 plays the role of connecting the float 7 and the slider 9. The slider 9 is cylindrical, and its outer wall sliding seal is set at the entrance of the nozzle body 1. The slider 9 can slide along the axial direction of the nozzle body 1 and close the chute 11. The side of the slider 9 is fixedly connected to the ring plate 6 of the bottom water cooling chamber 2 through a connecting rod 10. The outer wall of the nozzle body 1 is provided with a chute 11 for the connecting rod 10 to pass through; both ends of the slider 9 are provided with material passages 12 connected to the material flow channel 3, and the material passages 12 are evenly distributed around the support rod 8 with the center of the slider 9 as the center of the circle. By setting the float 7, the larger the flow rate of the material, the farther the float 7 is from the entrance of the nozzle body 1, and the float 7 moves under the action of the material flow rate, and the support rod 8 drives the slider 9 and the ring plate 6 to move, and the ring plate 6 can move together with the float 7 to achieve the purpose of intelligent speed regulation.

[0028] In this embodiment, a connecting groove 13 is formed on the outer end surface of the slider 9, and an internal thread is provided on the inner side of the connecting groove 13 for connecting the material supply pipe. A through mounting hole 14 is provided at the bottom of the connecting groove 13, and a sliding hole 15 for the material through pipe 12 to pass through is formed at the inlet end of the nozzle body 1. One end of the material through pipe 12 is fixed in the mounting hole 14, and the other end of the material through pipe 12 extends into the material flow channel 3. The material is input into the material flow channel 3 through the material through pipe 12, and then ejected from the outlet of the nozzle body 1, so as to achieve the purpose of injection molding, reduce the leakage of the material, and save the structure and sealing costs.

[0029] In this embodiment, an annular flange 16 is formed at the upper end of the material passage 12. The diameter of the annular flange 16 is larger than the diameter of the slide hole 15, which serves as a downward limit for the material passage and prevents the material passage 12 and the slide block 9 from falling out.

[0030] In this embodiment, a guide rod 17 is arranged at the center of the material flow channel 3. The guide rod 17 is arranged along the axial direction of the material flow channel 3. The upper end of the guide rod 17 is fixedly connected to the nozzle body 1, and the lower end of the guide rod 17 can be slidably inserted into the float 7 and the support rod 8. When the float 7 and the support rod 8 move up and down, since they are sleeved on the outside of the guide rod 17, they can be guided by the guide rod 17, so that the float 7 and the support rod 8 can be displaced more regularly along the axial direction of the nozzle body 1 to increase the stability of flow control.

[0031] In this embodiment, a spring 18 is sleeved on the outer side of the support rod 8, and the two ends of the spring 18 are respectively fixedly connected to the float 7 and the nozzle body 1, and are used to rebound the float 7 to its original position when it is not in use, so that it is more stable during subsequent use. A plurality of grooves are evenly arranged on the surface of the float 7, which can increase the viscosity between the material and the float 7, making the buoyancy of the float 7 more obvious.

[0032] In this embodiment, a water inlet 19 and a water outlet 20 are respectively provided at both ends of the water cooling chamber 2, the water inlet 19 is connected to a water inlet pipe 21, and the water outlet 20 is connected to a water outlet pipe 28; the water inlet pipe 21 is connected to a bracket 22, the water inlet pipe 21 is a flexible pipe, the bracket 22 includes a first connecting rod 23, a first clamping groove 24, a second connecting rod 25 and a second clamping groove 26, one end of the first connecting rod 23 is fixedly connected to the first clamping groove 24, and the other end is hinged to the second connecting rod 25 to form a triangle, the first connecting rod 23 and the second connecting rod 25 can be fastened by fasteners, and the end of the second connecting rod 25 away from the first connecting rod 23 is fixedly connected to the second clamping groove 26, the first clamping groove 24 and the second clamping groove 26 are respectively used to clamp into the water pipe 21, by setting the first connecting rod 23 and the second connecting rod 25, the angle between the two can be changed, so that the water inlet pipe 21 can be bent, so that the flow of the water inlet pipe 21 can be controlled as needed. By providing the bracket 22 to be connected to the injection molding machine body, the heat transfer effect can be reduced.

[0033] In this embodiment, a plurality of water-cooling chambers 2 are arranged axially along the nozzle body 1, and the ring plates 6 of the water-cooling chambers 2 are connected by an axial rod 27. The axial rod 27 is slidably sealed with the outer shell 5 of the water-cooling chamber 2. By setting a plurality of water-cooling chambers 2, a step-by-step water cooling effect can be achieved, thereby avoiding the problem of excessive water temperature at the outlet due to single-stage water cooling. This method can provide a better overall water cooling effect.

[0034] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. An injection molding machine nozzle capable of intelligent temperature control, comprising a nozzle body and a water cooling chamber arranged outside the nozzle body for cooling the nozzle body, characterized in that: A conical material flow channel is formed on the inner side of the nozzle body, and the diameter of the material flow channel gradually increases from the inlet to the outlet of the nozzle body. A conical water-cooling flow channel is formed on the inner side of the water-cooling chamber, and the diameter of the water-cooling flow channel gradually increases from the inlet to the outlet of the nozzle body. The water-cooling chamber includes an outer shell and a ring plate arranged in the outer shell. A float is arranged in the material flow channel, and the float is fixedly connected to the slider through a rod. The slider sliding seal is arranged at the inlet of the nozzle body. The slider can slide along the axial direction of the nozzle body. The side of the slider is fixedly connected to the ring plate through a connecting rod. The outer wall of the nozzle body is provided with a slide groove for the connecting rod to pass through. Material through pipes connected to the material flow channel are arranged at both ends of the slider.

2. The intelligent temperature-controllable injection molding machine nozzle according to claim 1, characterized in that: A connecting groove is formed on the outer end surface of the slider, a penetrating mounting hole is opened at the bottom of the connecting groove, a sliding hole for a material passage pipe to pass through is formed at the inlet end of the nozzle body, one end of the material passage pipe is fixed in the mounting hole, and the other end of the material passage pipe extends into the material flow channel.

3. The intelligent temperature-controllable injection molding machine nozzle according to claim 2, characterized in that: An annular flange is formed at the upper end of the material passage pipe, and the diameter of the annular flange is greater than the diameter of the sliding hole.

4. The intelligent temperature-controllable injection molding machine nozzle according to claim 2, characterized in that: A guide rod is arranged at the center of the material flow channel, and the guide rod is arranged along the axial direction of the material flow channel. The upper end of the guide rod is fixedly connected to the nozzle body, and the lower end of the guide rod can be slidably inserted into the float and the support rod.

5. The intelligent temperature-controllable injection molding machine nozzle according to claim 2, characterized in that: A spring is sleeved on the outer side of the support rod, and two ends of the spring are fixedly connected to the float and the nozzle body respectively.

6. The intelligent temperature-controllable injection molding machine nozzle according to claim 1, characterized in that: A plurality of grooves are evenly arranged on the surface of the float.

7. The intelligent temperature-controllable injection molding machine nozzle according to claim 1, characterized in that: A water inlet and a water outlet are respectively provided at both ends of the water cooling chamber, the water inlet is connected to a water inlet pipe, and the water outlet is connected to a water outlet pipe; the water inlet pipe is connected to a bracket, the water inlet pipe is a flexible pipe, and the bracket includes a first connecting rod, a first clamping groove, a second connecting rod and a second clamping groove, one end of the first connecting rod is fixedly connected to the first clamping groove, and the other end is hinged to the second connecting rod in a triangle shape, the first connecting rod and the second connecting rod can be fastened by fasteners, and the second connecting rod is fixedly connected to the second clamping groove at one end away from the first connecting rod, and the first clamping groove and the second clamping groove are respectively used to clamp the water inlet pipe.

8. An injection molding machine nozzle capable of intelligent temperature control according to any one of claims 1 to 7, characterized in that: The water cooling chambers are arranged in a plurality of groups along the axial direction of the nozzle body, and the ring plates of the water cooling chambers are connected by axial rods, and the axial rods are in sliding sealing cooperation with the outer shell of the water cooling chambers.

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