Injection punch capable of rapidly cooling

Abstract

A fast cooling injection punch comprises a punch body and an injection rod connecting part, and is characterized in that the punch body is connected with the injection rod connecting part through a threaded connection structure, a cooling cavity is formed in the punch body, the injection rod connecting part extends into the cooling cavity, and the cooling cavity is communicated with the injection rod connecting part. The injection rod connecting part is provided with a water return cavity located in the injection rod connecting part, a water pipe hole and a plurality of backflow holes, the water pipe hole and the backflow holes are located in the injection rod connecting part and communicated with the water return cavity, and the water pipe hole axially penetrates to the end face, facing the bottom of the cooling cavity, of the injection rod connecting part. The backflow hole penetrates to the outer circumferential face, facing the cavity wall of the cooling cavity, of the injection rod connecting part, and the end face, facing the cavity bottom of the cooling cavity, of the injection rod connecting part is provided with a plurality of water flow grooves which are communicated with the water pipe hole, communicated to the outer circumferential face of the injection rod connecting part and used for enabling cooling water to flow. According to the injection punch, damage to the threaded connection structure is reduced, and the service life of the injection punch is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of injection punch of quick cooling, belong to die casting equipment technical field. BACKGROUND

[0002] Injection head is the important component on die casting machine, it mainly includes punch body, injection rod connecting part and other components, the both are usually connected by using threaded connection structure, using threaded connection structure, the manufacture of punch body, injection rod connecting part can be simplified.

[0003] Injection head will appear temperature is high under long time use, so as to cause threaded connection structure to be damaged due to injection head temperature is high, for this, injection head is usually cooled, so that the temperature of threaded connection structure is also cooled down.

[0004] The existing cooling mode is to send cold water to injection rod connecting part and punch body between by water pipe to realize the cooling of injection head, however, water flow is easy to stagnate or be blocked between injection rod connecting part and punch body, so that the cooling effect of threaded connection structure is not very good, and the service life is short. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of prior art, the present application provides a kind of injection punch of quick cooling, by being provided with water flow groove in the end face of injection rod connecting part, make the cooling water in cooling cavity between the end face of injection rod connecting part and the bottom of cooling cavity accelerate flow, accelerate cooling, so as to accelerate the cooling effect of threaded connection structure, reduce the damage of threaded connection structure, improve the service life of injection punch.

[0006] A kind of injection punch of quick cooling, including punch body, injection rod connecting part, it is characterized in that, the punch body and injection rod connecting part are connected by threaded connection structure, cooling cavity is provided in punch body, injection rod connecting part is inserted into the cooling cavity, injection rod connecting part is provided with backwater cavity in its interior and water pipe hole and a plurality of backflow holes on it and communicated with the backwater cavity, the water pipe hole is axially penetrated to the end face of the injection rod connecting part facing the bottom of the cooling cavity, the backflow hole is penetrated to the outer circumferential surface of the injection rod connecting part facing the cavity wall of the cooling cavity, the end face of the injection rod connecting part facing the bottom of the cooling cavity is provided with a plurality of water flow grooves communicated with the water pipe hole and connected to the outer circumferential surface of injection rod connecting part for making cooling water flow.

[0007] Preferably, the backflow hole is evenly distributed on the outer circumferential surface of the injection rod connecting part.

[0008] Preferably, the water flow groove is evenly distributed on the outer circumferential surface of the injection rod connecting part.

[0009] Preferably, the punch body comprises a punch main part, a plurality of sealing snap rings, the punch main part is provided with a snap ring bearing part near its end face, and the plurality of sealing snap rings are sequentially sleeved on the punch main part in the axial direction of the punch main part.

[0010] Preferably, in the plurality of sealing snap rings, at least one steel ring and one copper ring are contained, and the steel ring bears against the snap ring bearing part.

[0011] Preferably, the end face of the punch main part is provided with a plurality of heat dissipation demolding grooves.

[0012] Preferably, the heat dissipation demolding grooves are a plurality of heat dissipation demolding grooves, and the plurality of heat dissipation demolding grooves are arranged at equal angles in a circle around the central axis of the punch main part.

[0013] Preferably, the heat dissipation demolding groove has a filling gap, and the filling gap is towards the inner wall of the sealing snap ring close to the heat dissipation demolding groove.

[0014] In summary, the utility model has the following beneficial effects:

[0015] 1: The utility model discloses a water flow groove is arranged on the end face of the injection rod connecting part, cooling water between the end face of the injection rod connecting part and the bottom of the cooling cavity in the cooling cavity is accelerated to flow, thereby accelerating the flow of water flow between the injection rod connecting part and the punch body, cooling effect at the threaded connection structure is accelerated, damage of the threaded connection structure is reduced, and the service life of the injection punch is improved.

[0016] 2: The utility model discloses that the punch body is divided into a plurality of components and is composed, can replace the component according to the damage place without replacing the whole punch body, and the utilization rate of the punch body is improved.

[0017] 3: In the plurality of sealing snap rings, at least one steel ring and one copper ring are contained, the steel ring bears against the snap ring bearing part, the copper ring with higher cost is far away from the aluminum liquid, thereby prolonging the service life of the copper ring and reducing the maintenance cost of the punch body. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the injection punch;

[0019] Figure 2 It is a sectional view of the injection punch;

[0020] Figure 3 It is a use diagram of the injection punch;

[0021] Figure 4 It is Figure 1Enlarged view at A;

[0022] Figure 5 is a schematic view of another structure of a press ram;

[0023] Figure 6 is Figure 5 Enlarged view at B. DETAILED DESCRIPTION

[0024] The utility model will be further described below by specific examples in combination with the drawings.

[0025] Embodiment:

[0026] A press ram with rapid cooling, as shown in the figure, comprises a ram body 1, a press rod connecting part 2, and the ram body 1 and the press rod connecting part 2 are connected through a threaded connection structure. The press ram is used for extruding aluminum liquid in a barrel, extruding the aluminum liquid into a forming mold from the barrel, and thus obtaining a required workpiece. Figures 1-2 The ram body 1 is provided with a cooling cavity 11, and the press rod connecting part 2 extends into the cooling cavity 11. The press rod connecting part 2 is provided with a water return cavity 21 inside and a water pipe hole 22 and a plurality of return holes 23 on the surface and communicating with the water return cavity 21. The water pipe hole 22 extends axially to the end surface of the press rod connecting part 2 facing the bottom of the cooling cavity 11, and the return holes 23 extend to the outer circumferential surface of the press rod connecting part 2 facing the cavity wall of the cooling cavity 11. The end surface of the press rod connecting part 2 facing the bottom of the cooling cavity 11 is provided with a plurality of water flow grooves 24 communicating with the water pipe hole 22 and connecting to the outer circumferential surface of the press rod connecting part 2. In use, as shown in the figure, the water pipe 3 passes through the press rod connecting part 2 and is connected to the inner wall of the water pipe hole 22. The cooling water directly enters the cooling cavity 11 through the water pipe 3, absorbs a large amount of heat of the ram body 11, reduces the temperature of the ram body 11, and then the water flow after cooling the ram body 11 flows into the water return cavity 21 through the return holes 23. Then, the water flow flows out through the gap between the cavity wall of the water return cavity 21 and the outer surface of the water pipe 3. By arranging the water flow grooves 24, the cooling water in the cooling cavity 11 between the end surface of the press rod connecting part 2 and the bottom of the cooling cavity 11 is accelerated to flow, thereby accelerating the flow of the water flow between the press rod connecting part 2 and the ram body 1, accelerating the cooling, thereby accelerating the cooling effect of the threaded connection structure, reducing the damage of the threaded connection structure, and prolonging the service life of the press ram.

[0027] Figure 3 As

[0028] As Figure 2 ​As shown, the return holes 23 are arranged at equal angles around the central axis of the injection rod connecting part 2, so as to be uniformly distributed on the outer circumferential surface of the injection rod connecting part 2, so that the cooling effect of the cooling water on the inner circumferences of the punch body 1 is relatively uniform, and the temperature of the thread connection structure is not concentrated in some places. The return hole 23 can be further a radial hole structure.

[0029] The water flow groove 24 is arranged at equal angles around the central axis of the injection rod connecting part 2, so as to be uniformly distributed on the outer circumferential surface of the injection rod connecting part 2. The water flow groove 24 can be further a radial groove structure.

[0030] The punch body 1 comprises a punch main part 12, a plurality of sealing snap rings 13, the punch main part 12 is provided with a snap ring bearing part 121 near its end face, and the plurality of sealing snap rings 13 are sequentially sleeved on the punch main part 12 in the axial direction of the punch main part 12. The injection rod connecting part 2 comprises a locking ring part 25, which is arranged at the end of the injection rod connecting part 2 away from the bottom of the cooling cavity 11, and axially bears on the sealing snap ring 13 away from the snap ring bearing part 121 among the plurality of sealing snap rings 13, so as to lock the plurality of sealing snap rings 13, and divide the punch body 1 into a plurality of components, so that the punch main part 12 and any one of the sealing snap rings 13 can be replaced separately, so that the damaged parts of the punch body 1 can be replaced specifically without replacing the entire punch body 1, thereby improving the utilization rate of the punch body 1.

[0031] Among the above-mentioned plurality of sealing snap rings 13, at least one steel ring and one copper ring are included. The cost of the steel ring is much lower than that of the copper ring. The steel ring bears on the snap ring bearing part 121, so that the more expensive copper ring is away from the aluminum liquid, thereby prolonging the service life of the copper ring and reducing the maintenance cost of the punch body 1. In this embodiment, two steel rings and two copper rings are included, and the two copper rings are arranged between the two steel rings.

[0032] In addition, as shown, Figure 1 The end face of the punch main part 12 is provided with a plurality of heat dissipation demolding grooves 14. When the punch body 1 extrudes the aluminum liquid in the barrel, the heat dissipation demolding grooves 14 increase the contact surface between the punch body 1 and the aluminum liquid, thereby accelerating the heat dissipation of the aluminum liquid to a certain extent. At the same time, when the punch body 1 is reset, the demolding between the punch body 1 and the aluminum liquid can be improved. The heat dissipation demolding grooves 14 are a plurality of heat dissipation demolding grooves 14 arranged at equal angles around the central axis of the punch main part 12.

[0033] As shown, Figure 4As shown, the heat dissipation demolding groove 14 is provided with a filling gap 141 near the outer periphery of the punch main part 12, the filling gap 141 is towards and passes through the inner wall of the sealing snap ring 13 near the heat dissipation demolding groove 14. Generally, the outer circle of the first sealing snap ring 13, i.e. the steel ring, wears very fast with the continuous use of the injection punch, and the existence of the filling gap 141 allows the aluminum liquid to fill from the filling gap 141 to the sealing snap ring 13 to expand the sealing snap ring 13 during the process of the injection punch injecting the aluminum liquid, so as to keep the sealing snap ring 13 and the inner hole of the barrel precisely fitted. The above-mentioned steel ring comprises a steel ring inner wall 131, a steel ring outer wall 132, and a bearing surface 133 connecting the steel ring inner wall 131 and the steel ring outer wall 132 for bearing against the bearing part 121 of the snap ring.

[0034] As shown in the drawings, Figures 5-6 The copper ring comprises a tearing gap composed of a seam edge one 134 and a seam edge two 135, the seam edge one 134 and the seam edge two 135 are structures on the copper ring corresponding to the tearing gap, the seam width of the tearing gap is as small as possible, and in the actual injection process, it is not excluded that the aluminum liquid enters the inside of the copper ring and connects the inner wall of the copper ring with the punch main part 12 when solidified. When the copper ring needs to be replaced due to damage, the existence of the tearing gap facilitates tearing and removing the copper ring. The seam edge one 134 and the seam edge two 135 are provided with a clamping groove 136 and a clamping head 137 connected with each other, which ensures the structural stability of the copper ring during use of the injection punch.

[0035] The above embodiments only describe the preferred embodiments of the present application, and do not limit the design concept and scope of the present application. Various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design concept of the present application shall fall within the protection scope of the present application. The technical content claimed by the present application has been fully recorded in the claims.

Claims

1. A quick cooling plug, comprising a plug body (1), a plug rod connecting portion (2), characterized in that, The punch body (1) and the injection rod connecting part (2) are connected by a threaded connection structure, the punch body (1) is provided with a cooling cavity (11), the injection rod connecting part (2) extends into the cooling cavity (11), the injection rod connecting part (2) is provided with a water return cavity (21) in the interior thereof and a water pipe hole (22) and a plurality of return holes (23) on the surface thereof and communicating with the water return cavity (21), the water pipe hole (22) axially penetrates to the end surface of the injection rod connecting part (2) facing the bottom of the cooling cavity (11), the return holes (23) penetrate to the outer circumferential surface of the injection rod connecting part (2) facing the wall of the cooling cavity (11), and the end surface of the injection rod connecting part (2) facing the bottom of the cooling cavity (11) is provided with a plurality of water flow grooves (24) communicating with the water pipe hole (22) and communicating to the outer circumferential surface of the injection rod connecting part (2) for flowing of cooling water.

2. A rapid cooling plug according to claim 1, wherein The return holes (23) are uniformly distributed on the outer circumferential surface of the injection rod connecting part (2).

3. A rapid cooling plug according to claim 1, wherein The water flow grooves (24) are uniformly distributed on the outer circumferential surface of the injection rod connecting part (2).

4. A rapid cooling plug according to claim 1, wherein The punch body (1) comprises a punch main body part (12), a plurality of sealing snap rings (13), the punch main body part (12) is provided with a snap ring abutting part (121) near the end surface thereof, the plurality of sealing snap rings (13) are sleeved on the punch main body part (12) in the axial direction of the punch main body part (12), and the injection rod connecting part (2) further comprises a locking ring part (25) arranged at the end portion away from the bottom of the cooling cavity (11) and used for locking the plurality of sealing snap rings (13).

5. A rapid cooling plug according to claim 4, wherein Among the plurality of sealing snap rings (13), at least one is a steel ring and one is a copper ring, and the steel ring abuts against the snap ring abutting part (121).

6. A rapid cooling shot pin according to claim 4, wherein The end surface of the punch main body part (12) is provided with a plurality of heat dissipation demolding grooves (14).

7. A rapid cooling shot pin according to claim 6, wherein The heat dissipation demolding grooves (14) are a plurality of heat dissipation demolding grooves (14) arranged in a circumferential array on the end surface of the punch main body part (12).

8. A rapid cooling plug according to claim 7, wherein The heat dissipation demolding groove (14) has a filling gap (141) close to the outer periphery of the punch main body part (12), and the filling gap (141) faces the inner wall of the sealing snap ring (13) close to the heat dissipation demolding groove (14).

9. A rapid cooling shot pin according to claim 5, wherein The copper ring comprises a tearing gap composed of a first seam edge part (134) and a second seam edge part (135), and the first seam edge part (134) and the second seam edge part (135) are provided with a clamping groove (136) and a clamping head (137) connected with each other.

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