Integral hot runner system

Abstract

The utility model relates to the technical field of hot runners, and discloses an integral hot runner system which comprises a splitter plate and a core body, the core body is detachably connected with the splitter plate; one end of the core body is a core body head, and a core body protruding part is arranged on the periphery of the core body head. A first clearance position is formed between the head of the core body and the splitter plate, and the protruding part of the core body is partially attached to the splitter plate to form a second clearance position. According to the utility model, the first clearance position is formed between the head part of the core body and the splitter plate, and the convex part of the core body is partially attached to the splitter plate to form the second clearance position, so that the attachment surface of the core body and the splitter plate can be effectively prevented from being stressed and deformed due to thermal expansion, the failure of a sealing surface is prevented, and the situation that the core body is stressed and broken can be further avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runners, in particular to an integrated hot runner system. Background Art

[0002] For the automotive industry, an integral hot runner system is basically used in the hot runner system, that is, all the accessories of the entire hot runner system are assembled into a whole to facilitate installation and maintenance, and also to facilitate customers' mold repair.

[0003] Due to the particularity of the hot runner system, the temperature of the manifold will be much higher than that of the entire mold; and after the manifold expands due to heat, there will be a deviation from the original concentric state with the core; the deformation force caused by the deviation acts on the connection between the core and the manifold, which can easily cause the sealing glue bonding surface to deform and separate, and even cause the core to break. Utility Model Content

[0004] In view of this, the utility model provides an integrated hot runner system to solve the problem that the fitting surfaces of the core and the manifold are deformed due to thermal expansion, resulting in failure of the sealing surface and even causing the core to break.

[0005] The utility model provides an integrated hot runner system, comprising:

[0006] Manifolds and cores;

[0007] The core body is detachably connected to the diverter plate;

[0008] One end of the core is a core head, and a core protrusion is provided on the outer periphery of the core head;

[0009] A first avoidance position is formed between the core head and the diverter plate, and a second avoidance position is formed by the core protrusion and the diverter plate being partially fitted.

[0010] Beneficial effects: By making the core and the manifold detachably connected, the core can be disassembled more conveniently when it is replaced or repaired, thereby improving the efficiency of core replacement or repair. When the core is installed on the manifold, a first avoidance position is formed between the core head and the manifold. Compared with the prior art, the core head has fewer protrusions, thereby reducing the first avoidance position between the core head and the manifold, increasing the effective contact area between the core and the manifold mating surface, thereby increasing the force-bearing performance of the core, and being able to effectively prevent the manifold mating surface from failing due to deformation. By arranging a core protrusion on the periphery of the core head, the core protrusion is partially fitted with the manifold, thereby forming a second avoidance position. When the core is subjected to the force of thermal expansion and deformation, the plane where the core protrusion contacts the manifold acts as a force-bearing part to share the force from the manifold mating surface. The utility model can effectively prevent the fitting surfaces of the core body and the diverter plate from being deformed due to thermal expansion, thereby preventing the sealing surface from failing, and further can avoid the core body from being fractured due to stress.

[0011] In an optional embodiment, a groove surrounding the core head is provided on the protruding portion of the core, and the groove is the second avoidance position.

[0012] Beneficial effect: By setting the second avoidance position around the core head, when the core is subjected to the force of thermal expansion and deformation, the outer hexagonal plane plays a force-bearing role to share the force on the fitting surface, thereby avoiding the failure of the sealing surface due to thermal expansion between the core and the fitting surface of the manifold.

[0013] In an optional implementation, the second clearance position is 0.01 mm-0.03 mm.

[0014] Beneficial effect: By reasonably setting the second avoidance position, when the core body expands due to heat, the expansion force can be better absorbed to better protect the core body.

[0015] In an optional embodiment, it further comprises a nozzle heater, which is sleeved on the outer periphery of the core body;

[0016] The other end of the core is a core tail, and a third avoidance position is formed between the core tail and the nozzle heater.

[0017] Beneficial effect: The nozzle heater is sleeved on the outer periphery of the core body to heat the core body; by setting a third avoidance position between the tail of the core body and the nozzle heater, when the core body is heated, the thermal expansion coefficient of the system is adjusted by the elastic deformation of the core body itself, thereby protecting the fitting surface between the core body and the nozzle heater.

[0018] In an optional embodiment, the third avoidance position is close to the protruding portion of the core body.

[0019] Beneficial effect: Arranging the third avoidance position close to the protruding portion of the core body can reduce the stress concentration on the protruding portion of the core body, make the force distribution more uniform, and improve the overall stability of the core body.

[0020] In an optional embodiment, the third clearance position decreases along the axial direction of the core tail portion away from the core head portion.

[0021] Beneficial effect: Since the temperature of the manifold is higher, the thermal expansion coefficient near the core head is larger. Setting a larger avoidance space near the core head can allow the core to absorb more thermal expansion coefficient. The gradually decreasing avoidance space also helps to enhance the structural strength and stability of the core tail, making it less likely to deform or displace during operation.

[0022] In an optional embodiment, the core body is detachably connected to the diverter plate via a screw thread structure.

[0023] In an optional embodiment, the thread structure includes a core outer thread arranged on the periphery of the core head and a diverter plate inner thread arranged on the diverter plate and matching the core outer thread.

[0024] Beneficial effects: The thread structure is relatively simple, and common tools such as wrenches can be used to complete installation and disassembly operations. The thread connection can provide good fastening force to ensure that the core will not loosen during operation, thereby ensuring the stability and reliability of the integral hot runner system.

[0025] In an optional embodiment, the protrusion of the core body is in the shape of an external hexagon.

[0026] Beneficial Effects: The external hexagonal shape provides multiple flat contact surfaces, which makes it easier and more secure to tighten and loosen with tools such as wrenches. The external hexagonal shape provides better stability when mating and reduces the shaking or rotation of the core during operation.

[0027] In an optional embodiment, the core is made of steel.

[0028] Beneficial effects: Steel has high strength and hardness. By using steel to make the core, it can withstand the high pressure and high temperature environment during the working process, is not easy to deform or damage, and steel is easy to process and manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a front view of an integrated hot runner system in the prior art;

[0031] Figure 2 for Figure 1 A is a partial enlarged schematic diagram;

[0032] Figure 3 for Figure 1 A partial enlarged schematic diagram of B in the middle;

[0033] Figure 4 It is a front view of an integrated hot runner system according to an embodiment of the utility model;

[0034] Figure 5 for Figure 4 A is a partial enlarged schematic diagram;

[0035] Figure 6 for Figure 4 A partial enlarged schematic diagram of B in the figure.

[0036] Description of reference numerals:

[0037] 100, core body; 110, core body head; 111, core body outer thread; 112, core body protrusion; 120, core body tail; 130, first avoidance position; 140, second avoidance position; 150, third avoidance position; 200, manifold; 210, manifold inner thread; 300, nozzle heater; 400, template; 500, nozzle. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0039] In the prior art, such as Figures 1 to 3As shown, in the integrated hot runner system, the manifold 200 is installed on the template 400, and the nozzle 500 is installed in the core 100. A first avoidance position 130 is formed between the core head 110 of the core 100 and the fitting surface of the manifold 200. Since the first avoidance position 130 in the prior art is too large, after the manifold 200 is heated and expanded, a deviation will appear from the state originally concentric with the core 100. The deformation force caused by the deviation acts on the screw thread connection between the core 100 and the manifold 200, which easily causes the deformation and separation of the sealing glue fitting surface. The screw thread is deformed due to the force of the thermal expansion coefficient, resulting in the situation of the screw thread being stuck. Secondly, the distance L of the second avoidance position 140 between the protruding part 112 of the core and the manifold 200 is too large, resulting in the deformation of the fitting surface of the core 100 and the manifold 200 due to the force of the thermal expansion coefficient, resulting in the failure of the sealing glue surface, and further causing the hot runner system to leak glue. Finally, if a certain space is not reserved between the nozzle heater 300 and the core 100 , the core 100 may be broken due to the stress of the thermal expansion coefficient.

[0040] In view of this, the utility model provides an integrated hot runner system, which can effectively prevent the fitting surfaces of the core 100 and the manifold 200 from being deformed due to thermal expansion, thereby preventing the sealing surface from failing, and further avoiding the core 100 from being fractured due to stress.

[0041] Combine the following Figures 4 to 6 , describing an embodiment of the utility model.

[0042] According to an embodiment of the utility model, an integrated hot runner system is provided, comprising: a diverter plate 200 and a core body 100; the core body 100 and the diverter plate 200 are detachably connected; one end of the core body 100 is a core body head 110, and a core body protrusion 112 is provided on the outer periphery of the core body head 110; a first avoidance position 130 is formed between the core body head 110 and the diverter plate 200, and the core body protrusion 112 is partially fitted with the diverter plate 200 to form a second avoidance position 140.

[0043] In this embodiment, by detachably connecting the core 100 and the diverter plate 200, the core 100 can be disassembled more conveniently when it is replaced or repaired, thereby improving the efficiency of replacing or repairing the core 100. When the core 100 is installed on the diverter plate 200, a first avoidance position 130 is formed between the core head 110 and the diverter plate 200. Compared with the prior art, the core head 110 has fewer protrusions, thereby reducing the first avoidance position 130 between the core head 110 and the diverter plate 200, increasing the effective contact area between the core 100 and the diverter plate 200 mating surface, thereby increasing the force performance of the core 100, and being able to effectively prevent the diverter plate 200 mating surface from failing due to deformation. By arranging the core protrusion 112 on the periphery of the core head 110, the core protrusion 112 is partially fitted with the diverter plate 200, thereby forming the second avoidance position 140. When the core 100 is subjected to the force of thermal expansion deformation, the plane where the core protrusion 112 contacts the diverter plate 200 plays a force-bearing role to share the force from the fitting surface of the diverter plate 200. The utility model can effectively prevent the fitting surface of the core 100 and the diverter plate 200 from being deformed due to thermal expansion, thereby preventing the sealing surface from failing, and further avoiding the situation where the core 100 is fractured due to force.

[0044] In one embodiment, the core 100 is detachably connected to the manifold 200 through a screw thread structure. Further, the screw thread structure includes a core outer screw thread 111 arranged on the periphery of the core head 110 and a manifold inner screw thread 210 arranged on the manifold 200 and matching the core outer screw thread 111. The screw thread structure is relatively simple, and the installation and removal operations can be completed using common tools such as a wrench, and the screw thread connection can provide a good fastening force to ensure that the core 100 will not loosen during operation, thereby ensuring the stability and reliability of the integrated hot runner system.

[0045] In one embodiment, a groove surrounding the core head 110 is provided on the core protrusion 112, and the groove is a second avoidance position 140. By setting the second avoidance position 140 around the core head 110, when the core 100 is subjected to the force of thermal expansion and deformation, the outer hexagonal plane plays a force-bearing role to share the force of the fitting surface, thereby avoiding the situation where the sealing surface between the fitting surface of the core 100 and the diverter plate 200 fails due to thermal expansion.

[0046] In one embodiment, the second clearance position 140 is 0.01 mm-0.03 mm. By reasonably setting the second clearance position 140, when the core 100 expands due to heat, the expansion force can be better absorbed to better protect the core 100. In other embodiments, the second clearance position 140 can be any, for example, 0.04 mm, 0.06 mm, and 0.08 mm, etc., which can be selected according to actual conditions and is not specifically limited.

[0047] In one embodiment, a nozzle heater 300 is further included, which is sleeved on the outer periphery of the core 100; the other end of the core 100 is the core tail 120, and a third avoidance position 150 is formed between the core tail 120 and the nozzle heater 300. Furthermore, the third avoidance position 150 is close to the core protrusion 112; the third avoidance position 150 decreases along the axial direction of the core tail 120 away from the core head 110.

[0048] In this embodiment, the nozzle heater 300 is sleeved on the outer periphery of the core 100 for heating the core; the third avoidance position 150 is arranged between the core tail 120 and the nozzle heater 300, and is close to the core protrusion 112; when the core 100 is heated, the thermal expansion coefficient of the system is adjusted by the elastic deformation of the core 100 itself, thereby protecting the fitting surface between the core 100 and the nozzle heater 300. It can also reduce the stress concentration on the core protrusion 112, make the force distribution more uniform, and improve the overall stability of the core 100. Furthermore, the third avoidance position 150 decreases along the axial direction of the core tail 120 away from the core head 110, that is, the diameter of the core 100 at the core tail 120 close to the core protrusion 112 is the smallest, and the diameter of the core 100 gradually increases in the direction away from the core protrusion 112 until the core 100 fits with the nozzle heater 300. Since the temperature of the diverter plate 200 is relatively high and the thermal expansion coefficient is larger near the core head 110, a larger avoidance space is provided near the core head 110 so that the core 100 can absorb more thermal expansion coefficient. The gradually decreasing avoidance space also helps to enhance the structural strength and stability of the core tail 120, making it less likely to deform or displace during operation.

[0049] In one embodiment, the core protrusion 112 is in the shape of an external hexagon. The external hexagonal shape provides multiple flat contact surfaces, and the tightening and loosening operations can be performed more easily and firmly using tools such as wrenches. The external hexagonal shape can provide better stability when mating, and reduce the shaking or rotation of the core 100 during operation. The shape of the core protrusion 112 is exemplary and is not limited to the external hexagonal shape. The shape of the core protrusion 112 can be selected according to actual usage requirements.

[0050] In one embodiment, the material of the core 100 is steel. Steel has high strength and hardness. By using steel to make the core 100, it can withstand the high pressure and high temperature environment during the working process, is not easy to deform or damage, and steel is easy to process and manufacture. In other embodiments, the material of the core 100 can also be copper alloy and hard alloy, etc., which can be selected according to the use requirements.

[0051] In the integrated hot runner system provided by the utility model, the core 100 is optimized in three aspects. First, compared with the core 100 in the prior art, the protrusion of the core head 110 is removed, thereby reducing the space between the core head 110 and the fitting surface of the manifold 200, increasing the fitting area between the core head 110 and the fitting surface of the manifold 200, increasing the force-bearing performance of the manifold 200, and effectively preventing the fitting surface of the manifold 200 from failing due to force deformation. Secondly, the space between the protrusion 112 of the core and the manifold 200 is reduced. When the core 100 is subjected to the force of thermal expansion deformation, the outer hexagonal plane plays a force-bearing role to share the force of the fitting surface, while protecting the screw thread from being stuck due to force. Finally, a clearance space is added between the core tail 120 and the nozzle heater 300 near the core protrusion 112. When the core 100 is heated, the core 100 absorbs the thermal expansion coefficient through its own elastic deformation, thereby protecting the core 100 fitting surface and the screw thread. According to the test, through the optimization of the above three points, the failure rate between the fitting surface of the core 100 and the manifold 200 has been reduced from 3% to 0.02%; the screw thread jamming rate has been reduced from 8% to 0.1%.

[0052] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An integrated hot runner system, characterized in that: include: A splitter plate (200) and a core (100); The core (100) and the diverter plate (200) are detachably connected; One end of the core (100) is a core head (110), and a core protrusion (112) is provided on the outer periphery of the core head (110); A first avoidance position (130) is formed between the core head (110) and the diverter plate (200), and a second avoidance position (140) is formed by the core protrusion (112) and the diverter plate (200) being partially fitted together.

2. The integrated hot runner system according to claim 1, characterized in that: The core protrusion (112) is provided with a groove surrounding the core head (110), and the groove is the second avoidance position (140).

3. The integrated hot runner system according to claim 1, characterized in that: The second avoidance position (140) is 0.01 mm-0.03 mm.

4. The integrated hot runner system according to claim 1, characterized in that: It also includes a nozzle heater (300) which is sleeved on the outer periphery of the core (100); The other end of the core (100) is a core tail (120), and a third avoidance position (150) is formed between the core tail (120) and the nozzle heater (300).

5. The integrated hot runner system according to claim 4, characterized in that: The third avoidance position (150) is close to the core protrusion (112).

6. The integrated hot runner system according to claim 4, characterized in that: The third avoidance position (150) decreases along the axial direction of the core tail (120) in a direction away from the core head (110).

7. The integrated hot runner system according to claim 1, characterized in that: The core body (100) is detachably connected to the diverter plate (200) via a screw thread structure.

8. The integrated hot runner system according to claim 7, characterized in that: The thread structure comprises a core outer thread (111) arranged on the outer periphery of the core head (110) and a splitter plate inner thread (210) arranged on the splitter plate (200) and matching the core outer thread (111).

9. The integrated hot runner system according to claim 1, characterized in that: The core protrusion (112) is in the shape of an outer hexagon.

10. The integrated hot runner system according to claim 1, characterized in that: The core (100) is made of steel.

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