Heating circulation structure for nozzle

Abstract

The utility model discloses a heating circulation structure for a nozzle, which comprises a nozzle seat body, a first liquid inlet joint and a second liquid inlet joint are arranged on the nozzle seat body, and the first liquid inlet joint is parallel to the second liquid inlet joint; the flow guide pipe comprises an inner pipe body, an outer pipe body and a flow guide piece, a flow guide gap is formed in the flow guide piece, the flow guide piece is arranged on the inner pipe body in a sleeving mode, a flow guide groove is defined by the flow guide gap and the surface of the inner pipe body, a check ring is arranged at one end of the inner pipe body, and the inner pipe body penetrates through the nozzle seat body and then is fixed through a nut. The second liquid inlet connector is communicated to the flow guide groove, the flow guide piece is sleeved with the outer pipe body, one end of the outer pipe body makes contact with the nozzle base body, and the other opposite end of the outer pipe body makes contact with the check ring. Compared with the prior art, the rubber injection nozzle solves the problem that the heating and cooling efficiency of rubber raw materials in the main injection nozzle is low.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a heating circulation structure for a nozzle. Background Art

[0002] The main nozzle is a component of the cold runner system. During injection molding, the nozzle of the injection molding machine docks with the discharge port of the main nozzle. A circulating flow channel is usually set in the main nozzle to control the melting state of the rubber raw material in the main nozzle to avoid cooling and condensation and blockage of the main nozzle. For example, Chinese patent CN221067054U discloses a cold runner self-sealing main nozzle, the main nozzle comprises a main body, a movable core, an inner sleeve, a pressure cap, and a spring. The inner sleeve is arranged in the main body and passes through the main body. The inner hole of the inner sleeve is divided into an upper hole and a lower hole. The aperture of the upper hole is larger than the aperture of the lower hole. A flow channel is arranged in the movable core and a discharge port connected to the flow channel is arranged on the side wall of one end thereof. The outer diameter of the movable core is equal to the aperture of the lower hole. The movable core is penetrated in the inner hole of the inner sleeve and the discharge port is located in the lower hole for sealing. The end of the movable core away from the discharge port is connected to the pressure cap for docking with the nozzle of the injection molding machine. The movable core moves through the action of the nozzle. The discharge port is located in the upper hole. One end of the spring is connected to the outer wall of the main body, and the other end is connected to the pressure cap. The movable core returns to the lower hole through the rebound action of the spring to close the discharge port. The main nozzle can self-seal the pressure in the cold flow plate and the mold, so that the product yield is high and the production cost is reduced.

[0003] The guide groove of the existing guide sleeve in the main nozzle cannot make the oil fully contact the inner sleeve, which affects the heating and cooling efficiency of the rubber raw material passing through the inner sleeve. Utility Model Content

[0004] The utility model aims to provide a heating circulation structure for a nozzle to solve the problem of low temperature increase and temperature decrease efficiency of rubber raw materials in a main nozzle.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a heating circulation structure for a nozzle, comprising:

[0006] A nozzle seat body, on which a first liquid inlet joint and a second liquid inlet joint are arranged, and the first liquid inlet joint is parallel to the second liquid inlet joint;

[0007] The guide tube comprises an inner tube body, an outer tube body and a guide piece, wherein a guide gap is arranged on the guide piece, the guide piece is sleeved on the inner tube body, the guide gap and the surface of the inner tube body form a guide groove, a retaining ring is arranged at one end of the inner tube body, the inner tube body is fixed by a nut after passing through the nozzle seat body, a first liquid inlet joint is connected to the guide groove, a second liquid inlet joint is connected to the guide groove, the outer tube body is sleeved on the outside of the guide piece, one end of the outer tube body contacts the nozzle seat body, and the other opposite end contacts the retaining ring.

[0008] As a further description of the above technical solution:

[0009] The flow guide comprises a first fork-shaped portion and a second fork-shaped portion, the first fork-shaped portion and the second fork-shaped portion are staggered, and a gap between the first fork-shaped portion and the second fork-shaped portion forms a flow guide gap.

[0010] As a further description of the above technical solution:

[0011] The outer diameter of the retaining ring is equal to the outer diameter of the outer tube body.

[0012] As a further description of the above technical solution:

[0013] A rubber sealing ring is sleeved on the inner tube body, one side of the rubber sealing ring contacts the flow guide piece, and the other side opposite to the rubber sealing ring contacts the retaining ring.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] 1. In the utility model, when the nozzle is injecting glue, the glue is ejected through the inner tube body of the guide tube on the nozzle seat body. The first liquid inlet joint and the second liquid inlet joint on the nozzle seat body are used to pass the oil into or out of the guide tube, one for passing the oil and the other for discharging the oil. The oil path flows from bottom to top and then from top to bottom along the guide groove inside the guide tube, so that the oil flowing through the oil path can fully exchange heat with the glue passing through the inner tube body, so that the nozzle can achieve the purpose of rapid heating and cooling through the oil path of the mold temperature controller.

[0016] 2. In the present invention, the guide pipe is a detachable structure composed of a set of inner, middle and outer three-layer components, which is convenient for repairing and cleaning the oil circuit and reduces the maintenance cost of the guide pipe.

[0017] 3. In the utility model, the flow guide comprises a first fork-shaped portion and a second fork-shaped portion, the first fork-shaped portion and the second fork-shaped portion are staggered, and the gap between the first fork-shaped portion and the second fork-shaped portion forms a flow guide gap, so that uniform flow guide grooves are formed on both sides of the inner tube body, effectively ensuring the heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the coordination between the guide tube and the nozzle in a heating circulation structure for a nozzle Figure 1 .

[0020] Figure 2 A schematic diagram of the coordination between the guide tube and the nozzle in a heating circulation structure for a nozzle Figure 2 .

[0021] Figure 3 A schematic diagram of the coordination between the guide tube and the nozzle in a heating circulation structure for a nozzle Figure 3 .

[0022] Figure 4 A schematic diagram of the structural breakdown of a heating circulation structure for a nozzle.

[0023] Legend:

[0024] 1. Nozzle seat; 11. First liquid inlet joint; 12. Second liquid inlet joint; 2. Flow guide tube; 21. Inner tube body; 211. Retaining ring; 212. Nut; 22. Outer tube body; 23. Flow guide; 231. Flow guide gap; 232. First fork-shaped part; 233. Second fork-shaped part; 3. Rubber sealing ring; 9. Nozzle. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example 1

[0027] See also Figure 1-4 The utility model provides a technical solution: a heating circulation structure for a nozzle, comprising:

[0028] The nozzle base 1 is provided with a first liquid inlet connector 11 and a second liquid inlet connector 12, wherein the first liquid inlet connector 11 is parallel to the second liquid inlet connector 12;

[0029] The flow guide tube 2 comprises an inner tube body 21, an outer tube body 22 and a flow guide member 23. The flow guide member 23 is provided with a flow guide gap 231. The flow guide member 23 is sleeved on the inner tube body 21. The flow guide gap 231 and the surface of the inner tube body 21 form a flow guide groove. A retaining ring 211 is provided at one end of the inner tube body 21. The inner tube body 21 passes through the nozzle seat body 1 and is fixed by a nut 212. The first liquid inlet joint 11 is connected to the flow guide groove, and the second liquid inlet joint 12 is connected to the flow guide groove. The outer tube body 22 is sleeved on the outside of the flow guide member 23. One end of the outer tube body 22 contacts the nozzle seat body 1, and the other end contacts the retaining ring 211.

[0030] The flow guide 23 includes a first fork-shaped portion 232 and a second fork-shaped portion 233. The first fork-shaped portion 232 and the second fork-shaped portion 233 are staggered, and the gap between the first fork-shaped portion 232 and the second fork-shaped portion 233 forms a flow guide gap 231. The staggered arrangement of the first fork-shaped portion 232 and the second fork-shaped portion 233 forms uniform flow guide grooves on both sides of the inner tube body 21, effectively ensuring the heat exchange effect.

[0031] The outer diameter of the retaining ring 211 is equal to the outer diameter of the outer tube body 22 , so as to prevent the inner tube body 21 from being loosened during installation and to prevent the oil from leaking out of the guide tube 2 .

[0032] The inner tube body 21 is sleeved with a rubber sealing ring 3, one side of the rubber sealing ring 3 contacts the flow guide 23, and the other side contacts the retaining ring 211. The inner diameter of the rubber sealing ring 3 is equal to the outer diameter of the inner tube body 21, and the outer diameter of the rubber sealing ring 3 is less than or equal to the outer diameter of the outer tube body 22. The elastic deformation ability of the rubber sealing ring 3 is utilized to further improve the sealing effect of the flow guide tube 2.

[0033] Working principle: When the nozzle 9 is injecting glue, the rubber is ejected through the inner tube body 21 of the guide tube 2 on the nozzle seat body 1. The first liquid inlet joint 11 and the second liquid inlet joint 12 on the nozzle seat body 1 are used to pass the oil into or out of the guide tube 2, one for passing the oil and the other for discharging the oil. The oil path flows from bottom to top and then from top to bottom along the guide groove inside the guide tube 2, so that the oil flowing through the oil path can fully exchange heat with the rubber passing through the inner tube body 21, so that the nozzle can achieve the purpose of rapid heating and cooling through the oil path of the mold temperature controller. The guide tube is a detachable structure composed of an inner, middle and outer three-layer component set, which is convenient for repairing and cleaning the oil path and reducing the maintenance cost of the guide tube.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heating circulation structure for a nozzle, characterized in that: include: A nozzle seat body, on which a first liquid inlet joint and a second liquid inlet joint are arranged, wherein the first liquid inlet joint is parallel to the second liquid inlet joint; A flow guide tube comprises an inner tube body, an outer tube body and a flow guide member, wherein a flow guide gap is arranged on the flow guide member, the flow guide member is sleeved on the inner tube body, the flow guide gap and the surface of the inner tube body form a flow guide groove, a retaining ring is arranged at one end of the inner tube body, the inner tube body is fixed by a nut after passing through the nozzle seat body, the first liquid inlet joint is connected to the flow guide groove, the second liquid inlet joint is connected to the flow guide groove, the outer tube body is sleeved on the outside of the flow guide member, one end of the outer tube body contacts the nozzle seat body, and the other opposite end contacts the retaining ring.

2. A heating circulation structure for a nozzle according to claim 1, characterized in that: The flow guide comprises a first fork-shaped portion and a second fork-shaped portion, the first fork-shaped portion and the second fork-shaped portion are staggered, and a gap between the first fork-shaped portion and the second fork-shaped portion forms the flow guide gap.

3. A heating circulation structure for a nozzle according to claim 1, characterized in that: The outer diameter of the retaining ring is equal to the outer diameter of the outer tube body.

4. A heating circulation structure for a nozzle according to claim 1, characterized in that: A rubber sealing ring is sleeved on the inner tube body, one side of the rubber sealing ring contacts the flow guide, and the other side opposite to the rubber sealing ring contacts the retaining ring.

5. A heating circulation structure for a nozzle according to claim 4, characterized in that: The inner diameter of the rubber sealing ring is equal to the outer diameter of the inner tube body.

6. A heating circulation structure for a nozzle according to claim 4, characterized in that: The outer diameter of the rubber sealing ring is smaller than or equal to the outer diameter of the outer tube body.

Images