Rapid cooling structure matched with hot runner
By setting up a water transport sleeve and a water runner at the lower part of the hot runner hot nozzle, the design of the water runner and the diverting groove section is solved, the problem of the hot runner outlet temperature is too high, rapid cooling and uniform cooling are achieved, and plastic products are improved quality and productivity.
Patent Information
- Application Number
- CN202420684312.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-06
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-06
AI Technical Summary
The temperature at the outlet of the hot runner hot nozzle is too high, resulting in plastic wire drawing, affecting the quality and production efficiency of plastic products.
A rapid cooling structure with matching hot runners is designed. By setting a water transport jacket at the lower part of the hot nozzle, a water runner is formed, and a water tank, an inlet and an outlet are provided on both sides of the water runner so that the water flow can take away heat, using the first and The gradual arrangement of the second shunt section reduces the water flow resistance and achieves uniform cooling.
Effectively and quickly cool down the outlet of the hot runner hot nozzle, avoiding excessive temperature and improving the quality and production efficiency of plastic products.
Smart Images
Figure CN222135740U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of hot runner injection molds, in particular to a quick cooling structure of a matching hot runner. Background Art
[0002] At present, hot runner is also called runner-free, which means that the plastic gathered in the runner does not solidify after each injection. When the plastic product is demoulded, there is no need to remove the sprue in the runner. Since the plastic in the runner has not solidified, the runner is still unobstructed during the next injection. However, the outlet of the hot runner nozzle (that is, the lower end of the nozzle core) often has a problem of too high temperature. If the temperature at the outlet of the hot nozzle cannot be cooled down in time, plastic drawing will occur, affecting the quality and production efficiency of plastic products. Summary of the invention
[0003] The utility model aims to overcome the deficiencies of the prior art and provide a quick cooling structure for a matching hot runner, which can quickly cool down the outlet of the hot runner nozzle.
[0004] The purpose of the utility model is achieved through the following technical solutions.
[0005] The utility model discloses a fast cooling structure of a matching hot runner, comprising a mold body and a hot nozzle, wherein the mold body is formed with a concave cavity, the lower part of the hot nozzle is arranged in the concave cavity, wherein a water transport jacket is adapted to be embedded in the concave cavity, the lower part of the hot nozzle is located in the water transport jacket, the water transport jacket comprises a cup body, a constricted neck is formed on the outer side of the lower end of the cup body, the outer wall of the cup body is adapted to be close to and connected to the inner wall of the concave cavity, a water flow channel is formed between the concave neck and the inner wall of the concave cavity, the hot nozzle comprises a nozzle core, the water flow channel is located on the outer side of the lower end of the nozzle core, a water trough is formed on the outer wall of the cup body, and the water trough is symmetrically arranged on both sides of the center axis of the cup body. On the side, the mold body is formed with a water inlet and a water outlet, the water inlet and the connecting port of the concave cavity are correspondingly connected to the upper end of the water trough located on one side of the cup body, the water outlet and the connecting port of the concave cavity are correspondingly connected to the upper end of the water trough located on the other side of the cup body, and the lower ends of the water troughs are respectively connected to the water flow channels; the water trough includes a first diversion trough and a second diversion trough, the first diversion trough and the second diversion trough are arranged close to each other, the lower end of the first diversion trough is formed with a first guide trough section, the lower end of the second diversion trough is formed with a second guide trough section, the first guide trough section and the second guide trough section are gradually arranged opposite to each other from top to bottom.
[0006] Preferably, the bottom of the first diverter groove is connected to the bottom of the second diverter groove to form a diverter ridge.
[0007] Preferably, a flange bottom is formed on the upper part of the water transport jacket, and the flange bottom is arranged above the water tank. A neck bottom end surface is formed on the lower part of the water transport jacket. An upper step and a lower step of the concave cavity are formed on the inner wall of the concave cavity. The flange bottom is abutted against the upper step of the concave cavity, and the flange bottom is sealed and connected to the upper step of the concave cavity through a corresponding sealing ring. The neck bottom end surface is abutted against the lower step of the concave cavity, and the neck bottom end surface is sealed and connected to the lower step of the concave cavity through a corresponding sealing ring.
[0008] Preferably, a screw hole is provided at the edge of the concave cavity, and a screw is threadedly installed corresponding to the screw hole. A flange upper step is formed on the upper part of the water transport jacket, and the head of the screw is pressed on the flange upper step.
[0009] Preferably, an inner fillet is formed between the neck portion and the cup body, and the first guide groove section and the second guide groove section are respectively connected to the inner fillet.
[0010] Compared with the prior art, the utility model has the following beneficial effects: a water transport sleeve is fitted and embedded in the concave cavity, the lower part of the hot nozzle is located in the water transport sleeve, a neck portion is formed on the outer side of the lower end of the cup body of the water transport sleeve, a water flow channel is formed between the neck portion and the inner wall of the concave cavity, the hot nozzle includes a nozzle core, the water flow channel is located on the outer side of the lower end of the nozzle core, a water trough is formed on the outer wall of the cup body, a water inlet and a water outlet are formed on the mold body, the connection port of the water inlet and the concave cavity is correspondingly connected to the upper end of the water trough located on one side of the cup body, and the connection port of the water outlet and the concave cavity is correspondingly connected to the upper end of the water trough located on the other side of the cup body. The lower ends of the water troughs are respectively connected to the water flow channels, and the water flowing through the water flow channels can take away the heat radiated outward from the lower end of the nozzle core, thereby quickly cooling down the outlet of the hot runner hot nozzle; by setting the water trough to include a first diverter groove and a second diverter groove, the first diverter groove and the second diverter groove are arranged close to each other, a first guide groove section is formed at the lower end of the first diverter groove, and a second guide groove section is formed at the lower end of the second diverter groove, and the first guide groove section and the second guide groove section are gradually arranged opposite to each other from top to bottom, which is beneficial to reducing the water flow resistance, thereby being beneficial to obtaining a uniform cooling effect at the outlet of the hot nozzle. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic cross-sectional structure diagram of the cooling structure of the utility model.
[0012] Figure 2 It is an exploded schematic diagram of the combination of the hot nozzle and the water transport jacket of the utility model.
[0013] Figure 3 It is a schematic cross-sectional structural diagram of a first embodiment of the water transport jacket of the utility model.
[0014] Figure 4It is a left structural schematic diagram of the second embodiment of the water transport jacket of the utility model.
[0015] Figure 5 Based on Figure 4 Schematic diagram of the cross-sectional structure in the top view direction.
[0016] Figure 6 It is a schematic diagram of a partial structure of a mold body viewed from above of the present invention.
[0017] Explanation of reference numerals: mold body 1; cavity 100; water flow channel 10; water inlet 101; water outlet 102; upper step 103 of the cavity; lower step 104 of the cavity; screw hole 105; water transport sleeve 2; neck portion 201; lower end surface of neck portion 2011; inner fillet 2012; cup body 202; bottom of flange 203; upper step 204 of flange; feed port 205; inner cone 206; water trough 21; first diversion groove 211; first guide groove section 2111; second diversion groove 212; second guide groove section 2121; diversion ridge 213; hot nozzle 3; valve needle 31; nozzle core 32; sealing ring 4; screw 5. DETAILED DESCRIPTION
[0018] The utility model is further described below in conjunction with the accompanying drawings.
[0019] The utility model is equipped with a rapid cooling structure of a hot runner, such as Figure 1 As shown, it includes a mold body 1 and a hot nozzle 3, as shown Figure 6 As shown, the mold body 1 is formed with a cavity 100, such as Figure 1 As shown, the lower part of the hot nozzle 3 is arranged in the concave cavity 100, and the water transport jacket 2 is adapted to be embedded in the concave cavity 100. In other words, the water transport jacket 2 covers the inner wall of the concave cavity 100. Figure 1 and Figure 2 As shown, the lower part of the hot nozzle 3 is located in the water transport jacket 2. Figure 4 As shown, the water transport sleeve 2 includes a cup body 202, and a constricted neck 201 is formed on the outer side of the lower end of the cup body 202. In other words, the outer diameter of the constricted neck 201 is smaller than the outer diameter of the cup body 202. Figure 1 As shown, the outer wall of the cup body 202 is adapted to be attached to the inner wall of the concave cavity 100, and a water flow channel 10 is formed between the neck portion 201 and the inner wall of the concave cavity 100, so the water flow channel 10 is annular; Figure 1 As shown, the hot nozzle 3 includes a nozzle core 32, and the water flow channel 10 is located outside the lower end of the nozzle core 32, that is, the water flow channel 10 surrounds the lower end of the nozzle core 32. The hot nozzle 3 also includes a valve needle 31. The lower end of the nozzle core 32 is formed with a pipe opening adapted to the valve needle 31. The plastic fluid is discharged through the pipe opening at the lower end of the nozzle core 32. Figure 3 As shown, the lower end of the water transport jacket 2 is formed with a feed inlet 205, and the feed inlet 205 is an inner conical surface; Figure 1As shown, when the lower end of the valve needle 31 contacts the feed port 205, the plastic fluid is cut off, and when the valve needle 31 is pulled up, the feed port 205 is opened, and the plastic fluid can be injected into the mold cavity; Figure 3 As shown, an inner conical surface 206 is formed on the upper side of the feed port 205. Figure 1 As shown, the inner conical surface 206 is adapted to the lower outer wall of the nozzle core 32 of the hot nozzle 3. Figure 1 and Figure 3 As shown, a water groove 21 is formed on the outer wall of the cup body 202. In some embodiments, the water groove 21 can be a straight groove (i.e., similar to a keyway for installing a flat key). Figure 3 As shown, the water tank 21 is symmetrically arranged on both sides of the central axis of the cup body 202. Figure 1 As shown, the mold body 1 is formed with a water inlet 101 and a water outlet 102. The connection port of the water inlet 101 and the concave cavity 100 is correspondingly connected to the upper end of the water tank 21 located on one side of the cup body 202, and the connection port of the water outlet 102 and the concave cavity 100 is correspondingly connected to the upper end of the water tank 21 located on the other side of the cup body 202. The lower end of the water tank 21 is respectively connected to the water flow channel 10. In some embodiments, as Figure 4 As shown, the water tank 21 includes a first diverter tank 211 and a second diverter tank 212. The first diverter tank 211 and the second diverter tank 212 are arranged close to each other. Figure 4 In general, the right side of the first diverter trough 211 is close to the left side of the second diverter trough 212, so the first diverter trough 211 and the second diverter trough 212 are combined into the water trough 21. Figure 4 As shown, a first guide groove section 2111 is formed at the lower end of the first diverter groove 211, and a second guide groove section 2121 is formed at the lower end of the second diverter groove 212. The first guide groove section 2111 and the second guide groove section 2121 are gradually arranged opposite to each other from top to bottom. In other words, the first guide groove section 2111 and the second guide groove section 2121 are arranged to bend outwards opposite to each other.
[0020] The working principle of the cooling structure of the utility model is briefly described as follows: Figure 1As shown, water is injected into the water inlet 101, and the water flows into the concave cavity 100 through the connection port between the water inlet 101 and the concave cavity 100. Since the connection port between the water inlet 101 and the concave cavity 100 corresponds to the upper end of the water tank 21 located on one side of the cup body 202, that is to say, the connection port between the water inlet 101 and the concave cavity 100 is opposite to the upper end of the corresponding water tank 21, the water flows into the water tank 21. Under the action of water pressure and the gravity of the water body, the water flows downward along the water tank 21, and then flows into the water flow channel 10 through the lower end of the water tank 21. During this period, since the first guide groove section 2111 and the second guide groove section 2121 are gradually arranged in opposite directions from top to bottom, specifically, a part of the water flows along the first guide groove section 2111 to turn (from axial turning to circumferential turning) to the water flow channel 10 and along approximately half of the water flow channel 10. Flow, at the same time, another part of the water flow turns in the opposite direction along the second guide groove section 2121 to flow to the other half (roughly) of the water flow channel 10, and then the two halves of the water flow merge at the lower end of the water tank 21 on the other side of the central axis of the cup body 202. During this period, the merging of the water flow is guided by the corresponding second guide groove section 2121 and the first guide groove section 2111, and the water flow then flows upward to the upper end of the water tank 21 on the other side of the central axis of the above-mentioned cup body 202, and then the water flow passes through the connection port between the water outlet 102 and the concave cavity 100 and enters the water outlet 102, so that the water flow can take away the heat dissipated outward from the lower end of the nozzle core 32, thereby quickly cooling down the lower end of the nozzle core 32, that is, quickly cooling down the outlet of the hot runner hot nozzle, to avoid the temperature at the outlet of the hot nozzle being too high and affecting the quality and production efficiency of the plastic products. Since the first guide groove section 2111 and the second guide groove section 2121 are arranged to be gradually opposite to each other from top to bottom, the annular water flow channel 10 can fully pass the water flow, avoiding the water flow to one side in the water flow channel 10 due to gravity when the water flow channel 10 is actually inclined. It is also beneficial for the water flow to flow in an orderly manner in the water flow channel 10, which is beneficial to reducing the water flow resistance, thereby facilitating a uniform cooling effect at the outlet of the hot nozzle and relatively improving the quality of the plastic products.
[0021] Furthermore, if Figure 4 and Figure 5 As shown, the bottom of the first diverter groove 211 is connected to the bottom of the second diverter groove 212 to form a diverter ridge 213, which can be understood as follows. Figure 5 As shown, the middle part of the water tank 21 is ridge-shaped. Specifically, the angle of the diversion ridge 213 (i.e. Figure 5The angle dimension "X" in the figure is 150 degrees to 160 degrees, so when the water flows from the connection port between the water inlet 101 and the concave cavity 100 to the diverter ridge 213 at the upper end of the water tank 21, the water flow is cut into two streams by the diverter ridge 213, and then the water flows downward through the first diverter groove 211 and the second diverter groove 212 respectively, so that the diverter effect is better, which is more conducive to making full use of the annular water flow channel 10.
[0022] Furthermore, if Figure 4 As shown, the upper part of the water transport jacket 2 is formed with a flange bottom 203, that is, the flange bottom 203 is formed at the flange structure of the upper part of the water transport jacket 2, and the flange bottom 203 is arranged above the water tank 21. The lower part of the water transport jacket 2 is formed with a constricted neck lower end surface 2011, that is, the constricted neck lower end surface 2011 is located at the lower side of the constricted neck 201, as shown in FIG. Figure 6 As shown, the inner wall of the cavity 100 is formed with an upper cavity step 103 and a lower cavity step 104. Figure 1 As shown, the bottom 203 of the flange is against the upper step 103 of the cavity, and the bottom 203 of the flange is sealed with the upper step 103 of the cavity through the corresponding sealing ring 4, and the lower end surface 2011 of the neck is against the lower step 104 of the cavity, and the lower end surface 2011 of the neck is sealed with the lower step 104 of the cavity through the corresponding sealing ring 4. Through the above arrangement, the water flow channel 10 is sealed and enclosed in a simple structure to prevent water from leaking out.
[0023] Furthermore, if Figure 6 As shown, a screw hole 105 is provided at the edge of the cavity 100. Figure 2 Combination Figure 6 As shown, the screw hole 105 is correspondingly threadedly installed with a screw 5, and a flange upper step 204 is formed on the upper part of the water transport jacket 2, that is, the flange upper step 204 is formed on the upper side of the above-mentioned flange structure, and the head of the screw 5 is pressed on the flange upper step 204, so that the head of the screw 5 clamps the flange structure of the upper part of the water transport jacket 2 on the concave cavity upper step 103 to prevent the water transport jacket 2 from shifting axially.
[0024] Furthermore, if Figure 4 As shown, an inner fillet 2012 is formed between the neck portion 201 and the cup body 202, so the inner fillet 2012 is set for the entire circumference, and the first guide groove section 2111 and the second guide groove section 2121 are respectively connected to the inner fillet 2012. That is to say, when processing the first guide groove section 2111, the milling cutter cuts to the position of the inner fillet 2012. By setting the inner fillet 2012, the water flow can flow more smoothly from the first guide groove section 2111 into the water flow channel 10, and the water flow can flow more smoothly from the second guide groove section 2121 into the water flow channel 10.
Claims
1. A rapid cooling structure with a hot runner, comprising a mold body (1) and a hot nozzle (3), wherein the mold body (1) is formed with a concave cavity (100), and the lower part of the hot nozzle (3) is arranged in the concave cavity (100), characterized in that: A water transport sleeve (2) is fitted and embedded in the concave cavity (100), the lower part of the hot nozzle (3) is located in the water transport sleeve (2), the water transport sleeve (2) comprises a cup body (202), the lower end of the cup body (202) is formed with a neck (201), the outer wall of the cup body (202) is fitted and connected to the inner wall of the concave cavity (100), a water flow channel (10) is formed between the neck (201) and the inner wall of the concave cavity (100), the hot nozzle (3) comprises a nozzle core (32), the water flow channel (10) is located on the outer side of the lower end of the nozzle core (32), a water trough (21) is formed on the outer wall of the cup body (202), the water trough (21) is symmetrically arranged on both sides of the central axis of the cup body (202), the mold body (1) is formed with a water inlet (101) and a water outlet (102), the water inlet (101) and the water outlet (102) are connected to the mold body (1). The connection port of the concave cavity (100) is correspondingly connected to the upper end of the water trough (21) located on one side of the cup body (202); the water outlet (102) and the connection port of the concave cavity (100) are correspondingly connected to the upper end of the water trough (21) located on the other side of the cup body (202); the lower end of the water trough (21) is respectively connected to the water flow channel (10); the water trough (21) comprises a first diverter trough (211) and a second diverter trough (212); the first diverter trough (211) and the second diverter trough (212) are arranged close to each other; the lower end of the first diverter trough (211) is formed with a first guide trough section (2111); the lower end of the second diverter trough (212) is formed with a second guide trough section (2121); the first guide trough section (2111) and the second guide trough section (2121) are gradually arranged opposite to each other from top to bottom.
2. The rapid cooling structure of the hot runner according to claim 1 is characterized in that: The bottom of the first diverter groove (211) is connected to the bottom of the second diverter groove (212) to form a diverter ridge (213).
3. The rapid cooling structure of the hot runner according to claim 1 is characterized in that: The upper portion of the water transport jacket (2) is formed with a flange bottom (203), the flange bottom (203) being arranged above the water tank (21), the lower portion of the water transport jacket (2) is formed with a neck lower end surface (2011), the inner wall of the cavity (100) is formed with a cavity upper step (103) and a cavity lower step (104), the flange bottom (203) is in contact with the cavity upper step (103), the flange bottom (203) is sealed to the cavity upper step (103) via a corresponding sealing ring (4), the neck lower end surface (2011) is in contact with the cavity lower step (104), the neck lower end surface (2011) is sealed to the cavity lower step (104) via a corresponding sealing ring (4).
4. The rapid cooling structure of the hot runner according to claim 3 is characterized in that: A screw hole (105) is provided at the edge of the concave cavity (100), and a screw (5) is screwed and installed corresponding to the screw hole (105). A flange upper step (204) is formed on the upper part of the water transport jacket (2), and the head of the screw (5) is pressed on the flange upper step (204).
5. The rapid cooling structure of the hot runner according to claim 1 is characterized in that: An inner fillet (2012) is formed between the neck portion (201) and the cup body (202), and the first guide groove section (2111) and the second guide groove section (2121) are respectively connected to the inner fillet (2012).