Injection molding type hot runner system convenient for flow regulation

Abstract

The utility model relates to the technical field of hot runners, and discloses an injection molding type hot runner system convenient for flow regulation, which comprises a hot runner plate, a needle valve, an assembly bolt, a feeding mechanism and a discharging pipe, the needle valve is communicated with an injection molding opening of the hot runner plate, and the feeding mechanism and the discharging pipe are respectively assembled on two sides of the outer part of the hot runner plate. A spiral channel is communicated between the feeding mechanism and the discharging pipe, the assembling bolts are assembled at four corners of the upper end of the hot runner plate, the feeding mechanism comprises a first short pipe and a second short pipe, the first short pipe is communicated with the hot runner plate, and the second short pipe is connected with the first short pipe. According to the injection molding type hot runner system convenient to adjust the flow, the first short pipe is automatically sealed, the situation that fluid in the first short pipe drips out to pollute the environment is avoided, meanwhile, by additionally arranging the first air bag and the second air bag, when the first short pipe is sealed, the air tightness between the limiting disc and the first short pipe is automatically improved, and the sealing performance is improved. And the sealing performance of fluid in the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of hot runner technology, specifically to an injection molding hot runner system that facilitates flow rate adjustment. Background Technology

[0002] Hot runner molds are a novel design that heats the runners and sprues of traditional or three-plate molds, eliminating the need to remove them during each molding cycle. Hot runners maintain the plastic in the runners and gates in a molten state through heating. Because heating rods and coils are located near or in the center of the runner, the entire runner from the injection molding machine nozzle to the gate is at a high temperature. After the plastic is injected into the mold cavity, it needs to cool and solidify. Molds typically use cooling water or other cooling media to lower the mold temperature, allowing the molten plastic to cool and solidify rapidly within the mold.

[0003] Hot runner molds typically require internal channels for cooling the workpiece or heating the mold itself. In existing technologies, pipes are often directly cut inside the hot runner mold, allowing heating or cooling fluids to flow directly into the pipes. This poses a risk of the channels bursting under pressure. Furthermore, the cooling or heating rates cannot be controlled, making it impossible to control the processing speed of the workpiece and thus reducing the yield rate. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides an injection molding hot runner system that facilitates flow rate adjustment. This solves the technical problems of directly discharging heating or cooling fluids into the interior of the pipe, which poses a risk of the channel being ruptured by pressure. Additionally, the cooling or heating rate cannot be controlled, leading to an inability to control the processing speed of the workpiece and thus reducing the yield rate of the workpiece.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an injection molding hot runner system that facilitates flow rate adjustment, comprising: a hot runner plate, a needle valve, mounting bolts, a feeding mechanism, and a discharge pipe. The needle valve is connected to the injection port of the hot runner plate. The feeding mechanism and the discharge pipe are respectively mounted on the outer sides of the hot runner plate, and a spiral channel connects the feeding mechanism and the discharge pipe. The mounting bolts are mounted at the four upper corners of the hot runner plate.

[0008] The feeding mechanism includes a first short pipe and a second short pipe. The first short pipe is connected to the hot runner plate, and the second short pipe is connected to the first short pipe. A limiting frame is embedded inside the second short pipe. A limiting plate is welded inside the first short pipe. A guide arm is inserted inside the limiting plate. A return plate is connected to the outside of the guide arm, and a sliding plate is connected to the other end of the guide arm. A spring is connected between the return plate and the limiting plate.

[0009] Preferably, a shut-off valve is installed on the outside of the discharge pipe, which can limit the fluid flow rate of the discharge pipe.

[0010] Preferably, a first airbag is fitted to the outside of the sliding disc, and a second airbag is fitted to one end of the sliding disc near the limiting disc. The second airbag is connected to the first airbag. Both the first and second airbags are filled with gas. When the first airbag is squeezed, the second airbag will expand. A sealing sleeve that fits against the inner wall of the first short tube is fitted to the outside of the second airbag.

[0011] Preferably, the limiting frame includes a star-shaped frame connected to the second short tube. A cross arm is fitted on the outside of the star-shaped frame, and a rubber sleeve is fitted on the end of the cross arm near the sliding disk. The rubber sleeve can prevent damage to the sliding disk when the limiting frame squeezes and drives the sliding disk.

[0012] Preferably, both the second short pipe and the first short pipe are equipped with external flanges, and the two flanges are connected by bolts, which allows for quick connection between the second short pipe and the first short pipe.

[0013] Preferably, a flow regulating valve is installed on the first short pipe, and a pneumatic actuator is installed on the outside of the flow regulating valve. The pneumatic actuator can control the flow regulating valve and together with the flow regulating valve, they form a flow regulating device commonly used in the prior art.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides an injection molding hot runner system that facilitates flow rate adjustment, and has the following beneficial effects:

[0016] This injection molding hot runner system, which facilitates flow regulation, uses an added feeding mechanism to regulate the flow rate of fluid entering the feeding mechanism, thereby improving the workpiece heating effect and preventing damage to the feeding mechanism due to excessive flow. Simultaneously, when the second short tube disconnects from the first short tube, the added sliding plate, guide arm, return plate, and limit plate automatically seal the first short tube, preventing fluid dripping from the first short tube and causing environmental pollution. Furthermore, the added first airbag automatically improves the airtightness between the limit plate and the first short tube when the first short tube is sealed, enhancing the sealing performance of the fluid inside the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the left side of this utility model;

[0018] Figure 2 This is a schematic diagram on the right side of the present invention;

[0019] Figure 3 This is an enlarged schematic diagram of the feeding mechanism of this utility model;

[0020] Figure 4 This is an internal sectional view of the feeding mechanism of this utility model;

[0021] Figure 5 This is a partial schematic diagram of the sliding disk of this utility model;

[0022] Figure 6 This is an enlarged schematic diagram of the sliding disk of this utility model.

[0023] In the diagram: 1. Hot runner plate; 2. Needle valve; 3. Assembly bolt; 4. Feeding mechanism; 41. First short pipe; 42. Second short pipe; 43. Limiting frame; 44. Limiting disc; 45. Sliding disc; 46. Guide arm; 47. Return plate; 48. First airbag; 49. Second airbag; 410. Spring; 5. Discharge pipe; 51. Shut-off valve; 6. Flow regulating valve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides a technical solution; please refer to [link / reference]. Figure 1 and Figure 2 A flow-adjustable injection molding hot runner system includes: a hot runner plate 1, a needle valve 2, mounting bolts 3, a feeding mechanism 4, and a discharge pipe 5. The needle valve 2 is connected to the injection port of the hot runner plate 1. The feeding mechanism 4 and the discharge pipe 5 are respectively mounted on the outer sides of the hot runner plate 1, and a spiral channel connects the feeding mechanism 4 and the discharge pipe 5. The mounting bolts 3 are mounted at the four corners of the upper end of the hot runner plate 1.

[0026] The hot runner plate 1 is a common hot runner mold in the prior art. The needle valve 2 can perform injection molding on the inside of the hot runner plate 1. The mounting bolts 3 facilitate the connection of the hot runner plate 1 with other devices in the injection molding equipment. The feeding mechanism 4, the discharge pipe 5, and the spiral channel can facilitate the heating or cooling of the inside of the hot runner plate 1.

[0027] Please see Figure 3 and Figure 4 The feeding mechanism 4 includes a first short pipe 41 and a second short pipe 42. The first short pipe 41 is connected to the hot runner plate 1, and the second short pipe 42 is connected to the first short pipe 41. A limiting frame 43 is embedded inside the second short pipe 42. A limiting plate 44 is welded inside the first short pipe 41. A guide arm 46 is inserted inside the limiting plate 44. A return plate 47 is connected to the outside of the guide arm 46, and a sliding plate 45 is connected to the other end of the guide arm 46. A spring 410 is connected between the return plate 47 and the limiting plate 44.

[0028] Please see Figure 5 and Figure 6 The first short pipe 41 can be connected to the second short pipe 42. The limiting frame 43 can drive the sliding plate 45 to move. The sliding plate 45, the limiting plate 44, the guide arm 46 and the return plate 47 work together to form a simple one-way valve, which can prevent the fluid inside the first short pipe 41 from being discharged.

[0029] The discharge pipe 5 is equipped with a shut-off valve 51, which can limit the fluid flow rate of the discharge pipe 5. The sliding plate 45 is equipped with a first airbag 48. The end of the sliding plate 45 near the limiting plate 44 is equipped with a second airbag 49, and the second airbag 49 is connected to the first airbag 48. Both the first airbag 48 and the second airbag 49 are filled with gas. When the first airbag 48 is squeezed, the second airbag 49 will expand. The second airbag 49 is equipped with a sealing sleeve that fits against the inner wall of the first short pipe 41.

[0030] The limiting frame 43 includes a star-shaped frame, which is connected to the second short tube 42. A cross arm is fitted on the outside of the star-shaped frame, and a rubber sleeve is fitted on the end of the cross arm near the sliding plate 45. The rubber sleeve can prevent the limiting frame 43 from squeezing and driving the sliding plate 45 and causing damage to the sliding plate 45.

[0031] Both the second short pipe 42 and the first short pipe 41 are equipped with external flanges, which are connected by bolts. The flanges allow for quick connection between the second short pipe 42 and the first short pipe 41. The first short pipe 41 is equipped with a flow regulating valve 6, and a pneumatic actuator is mounted on the outside of the flow regulating valve 6. The pneumatic actuator can control the flow regulating valve 6 and together with the flow regulating valve 6, they form a common flow regulating device in the prior art.

[0032] This solution first connects the external fluid to the second short pipe 42. When it is necessary to cool or heat the inside of the hot runner plate 1, the second short pipe 42 is assembled with the first short pipe 41. At the same time, the limiting bracket 43 moves against the sliding plate 45, releasing the closure of the limiting plate 44. At this time, the fluid is discharged through the first short pipe 41 and the spiral channel to cool or heat the inside of the hot runner plate 1. Meanwhile, the fluid is regulated and controlled by the flow regulating valve 6 to prevent the fluid flow rate from being too fast.

[0033] When the limiting bracket 43 releases its contact with the sliding plate 45, the second airbag 49 is squeezed by the limiting plate 44 when the sliding plate 45 returns to its original position, and the gas inside is discharged into the interior of the first airbag 48, causing it to expand and increase the fit with the first short tube 41, thereby improving the seal on the first short tube 41 and preventing fluid leakage.

[0034] The added feeding mechanism 4 regulates the flow rate of the fluid entering the feeding mechanism 4, improving the cooling and heating effect of the workpiece while preventing damage to the feeding mechanism 4 due to excessive flow. At the same time, when the second short pipe 42 is disconnected from the first short pipe 41, the added sliding plate 45, guide arm 46, return plate 47 and limit plate 44 automatically seal the first short pipe 41 to prevent the fluid inside the first short pipe 41 from dripping out and causing environmental pollution. In addition, the added first airbag 48 automatically improves the airtightness between the limit plate 44 and the first short pipe 41 when the first short pipe 41 is sealed, improving the sealing performance of the fluid inside the device.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection molding hot runner system with easily adjustable flow rate, comprising: The hot runner plate, needle valve, mounting bolts, feeding mechanism, and discharge pipe are provided. The needle valve is connected to the injection port of the hot runner plate. The feeding mechanism and discharge pipe are respectively mounted on the outer sides of the hot runner plate, and a spiral channel connects the feeding mechanism and the discharge pipe. The mounting bolts are mounted at the four corners of the upper end of the hot runner plate. The feeding mechanism includes a first short pipe and a second short pipe. The first short pipe is connected to the hot runner plate, and the second short pipe is connected to the first short pipe. A limiting frame is embedded inside the second short pipe. A limiting plate is welded inside the first short pipe. A guide arm is inserted inside the limiting plate. A return plate is connected to the outside of the guide arm, and a sliding plate is connected to the other end of the guide arm. A spring connects the return plate and the limiting plate.

2. The injection molding hot runner system with easily adjustable flow rate according to claim 1, characterized in that: A shut-off valve is fitted to the outside of the discharge pipe.

3. The injection molding hot runner system with easily adjustable flow rate according to claim 1, characterized in that: The sliding disc is equipped with a first airbag on its outside, and a second airbag is equipped with one end of the sliding disc near the limiting disc, and the second airbag is connected to the first airbag.

4. The injection molding hot runner system with easily adjustable flow rate according to claim 1, characterized in that: The limiting frame includes a star-shaped frame, which is connected to the second short tube. A cross arm is fitted on the outside of the star-shaped frame, and a rubber sleeve is fitted on the end of the cross arm near the sliding plate.

5. The injection molding hot runner system with easily adjustable flow rate according to claim 1, characterized in that: Both the second short pipe and the first short pipe have externally adjustable flanges, and the two flanges are connected by bolts.

6. The injection molding hot runner system with easily adjustable flow rate according to claim 1, characterized in that: The first short pipe is equipped with a flow regulating valve, and a pneumatic actuator is mounted on the outside of the flow regulating valve.

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