Die casting preheating device

Abstract

The utility model discloses a die casting preheating device, and relates to the technical field of forging dies. Comprising a preheating part, a ventilation part and an air inlet pipe which are arranged in sequence, and a flow limiting blocking piece is arranged between the ventilation part and the air inlet pipe; the air inlet pipe is used for outputting a thermal medium to the preheating component through the ventilation component; the heat medium is guided and limited to enter the ventilation component by the flow limiting baffle plate; a plurality of small holes are formed in the wall face of the preheating component, and the small holes are formed in the wall face of the preheating component in a matrix mode and form a spraying face. The size of the spraying surface is used for corresponding to a heating area of a casting mold. The casting mold preheating device can guarantee that airflow and air pressure are stable and sufficient in the casting mold preheating and baking process, uniform preheating of the casting mold is achieved, the safety coefficient is improved, and meanwhile energy waste and heat loss are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a forging die technical field, in particular to a drop die preheating device. BACKGROUND

[0002] Compared with hot-rolled steel, the comprehensive mechanical property of forged steel is better. When forging cylindrical bar stock, the upper and lower dies are generally used for forging, and the same set of dies is suitable for the forging of cylindrical bar stock of various diameters. The die generally uses a drop die, and the arc surface of the drop die cavity is a involute, which can match cylindrical bar stock of various diameters.

[0003] In winter, the drop die needs to be preheated by a preheating device before use to prevent cracking during use. The existing preheating device is a 304 steel pipe connected to the gas pipe of industrial gas for drop die baking and preheating. This preheating device has a high risk coefficient when igniting, and the gas pressure is not easy to control. When baking and preheating, the heat loss is large, the baking is uneven, and the size of the flame is not easy to control. SUMMARY

[0004] The utility model aims at providing a drop die preheating device to solve the technical problem of uneven baking of the drop die preheating area during preheating of the existing drop die preheating device,

[0005] A drop die preheating device, comprising a preheating component, an air passage component and an air inlet pipe arranged in sequence, a flow limiting baffle is arranged between the air passage component and the air inlet pipe; the air inlet pipe is used to output hot medium to the preheating component through the air passage component; the flow limiting baffle guides and limits the hot medium entering the air passage component; wherein the preheating component wall surface is provided with a plurality of small holes, and the small holes are arranged in a matrix on the preheating component wall surface and form a jet surface; wherein the size of the jet surface corresponds to the heating area of the drop die.

[0006] In the utility model, the hot medium covers industrial gas or similar gas.

[0007] The flow limiting baffle is arranged at the communication between the air passage component and the air inlet pipe to block part of the communication channel, achieving the purpose of limiting the flow rate and flow of the hot medium.

[0008] This utility model's mold preheating device introduces a heat medium from the air inlet pipe into the preheating component via a venting component. The heat medium leaks out through multiple small holes on the preheating component, forming a combustion surface on the entire exterior of the preheating component. The small holes are arranged in a matrix around the periphery of the preheating component, creating a spray surface that ensures uniform flame intensity on the combustion surface. This guarantees even heating of the mold during preheating and baking, while effectively reducing heat loss. A flow-limiting baffle effectively controls the flow rate of the heat medium, ensuring a stable temperature rise of the mold and preventing damage caused by excessive short-term temperature differences. It also effectively controls the flame size, improving the safety factor during mold preheating and baking.

[0009] Ventilation components can effectively buffer the airflow of the hot medium before it enters the preheating components, ensuring stable preheating combustion and improving the safety factor.

[0010] The preheating component and the ventilation component are connected to form an air cavity. The air cavity can temporarily store the heat medium and buffer the heat medium before it enters the preheating component, ensuring a stable and sufficient airflow during the preheating and baking process and ensuring the stability of the preheating temperature.

[0011] Furthermore, the preheating component is a cylindrical structure with a closed front end, and multiple small holes are provided through the cylindrical wall. The slamming mold consists of upper and lower molds. During preheating and baking, only the arc surface of the slamming mold cavity needs to be preheated. To reduce heat loss, the front end of the preheating component is closed, so that the heat medium entering the preheating component only forms a combustion surface on the outer periphery of the preheating component's cylindrical wall, ensuring uniform preheating of the slamming mold and reducing energy waste.

[0012] Furthermore, the ventilation component is a tubular structure, with one end of the ventilation component fixedly connected to the open end of the preheating component and the other end fixedly connected to the end of the air inlet pipe.

[0013] To facilitate the use of the preheating device, the preheating components, ventilation components, and air inlet pipe are fixedly connected to form an internal connection, and the connection is sealed to prevent leakage of the heat medium, ensuring the stability of the preheating device during use, and at the same time preventing leakage of the heat medium to ensure the safety of the working environment.

[0014] Furthermore, a flow-limiting orifice is formed on the flow-limiting baffle.

[0015] Because the flow rate of the hot medium flowing out of the intake pipe is high when the airflow is large, the flow-limiting baffle can reduce the flow rate of the airflow. The hot medium is slowly released into the air chamber through the flow-limiting orifice. After passing through the flow-limiting orifice, the flow rate of the hot medium will be greatly reduced, so as to achieve stable accumulation of the hot medium in the air chamber.

[0016] Furthermore, the inner diameter of the preheating component is larger than the inner diameter of the venting component, and the venting component is used to disperse the heat medium into the preheating component and reduce the flow rate of the heat medium.

[0017] The heat medium enters the preheating component from the smaller diameter ventilation component. Due to the increase in volume, the density of the heat medium inside the preheating component decreases, which reduces the internal air pressure. This reduces the pressure at which the heat medium flows out of the vent, ensuring that the heat medium can flow out of the vent smoothly and guaranteeing complete and safe combustion.

[0018] Furthermore, an airflow valve is provided on the air intake pipe.

[0019] The airflow valve is used to control the air pressure, flow rate and velocity of the hot medium entering the ventilation component, control ignition and extinguishing, and realize real-time adjustment of flame size, thereby improving the safety factor.

[0020] Furthermore, a support frame is fixed on the preheating component, which is used to maintain the spraying distance between the preheating component and the slamming mold.

[0021] A fixed support frame around the drying section allows the drying section to be stably placed on the slamming mold preheating section, creating a gas injection gap and combustion space between the preheating components and the slamming mold, ensuring smooth preheating and baking.

[0022] Furthermore, the support frame is perpendicular to the preheating component.

[0023] The beneficial effects of this utility model are:

[0024] 1. The slam mold preheating device of this utility model can ensure stable and sufficient airflow and air pressure during the slam mold preheating and baking process, realize uniform preheating of the slam mold preheating area, improve the safety factor, and reduce energy waste and heat loss.

[0025] 2. The preheating component of this utility model is closed at the front end, and with the small holes on the preheating component, the heat medium entering the preheating component forms a combustion surface only on the outer periphery of the preheating component cylinder wall. The small holes are arranged in a matrix to form a spray surface, which ensures uniform preheating of the mold and reduces energy waste and heat loss.

[0026] 3. The preheating component, ventilation component and air inlet pipe of this utility model are fixedly connected to ensure the stability of the preheating device during use, while preventing the leakage of heat medium and ensuring the safety of the working environment.

[0027] 4. The flow-limiting orifice of this utility model can significantly reduce the flow velocity of the hot medium entering the air cavity, thereby achieving stable accumulation of airflow within the air cavity.

[0028] 5. In this invention, the diameter of the air chamber located in the preheating component is larger than the diameter of the air chamber located in the venting component. This reduces the pressure of the hot medium flowing out of the vent, ensuring that the hot medium can flow smoothly out of the vent, and guaranteeing complete and safe combustion of the hot medium.

[0029] 6. The support frame of this utility model can create a combustion space between the preheating component and the slamming mold, ensuring the smooth progress of preheating and baking. Attached Figure Description

[0030] Figure 1 A cross-sectional view of this utility model;

[0031] Figure 2 Enlarged view of point A of this utility model;

[0032] Figure 3 A schematic diagram of this utility model.

[0033] Reference numerals: 1-Preheating component, 2-Ventilation component, 3-Inlet pipe, 4-Small hole, 5-Airflow valve, 6-Flow limiting baffle, 7-Flow limiting hole, 8-Support frame. Detailed Implementation

[0034] The technical solution of this utility model is described clearly and completely below. Obviously, the embodiments described herein are only one component of this utility model, and not embodiments of all components.

[0035] Example 1

[0036] like Figures 1-3 As shown, a preheating device for a slam mold includes a preheating component 1, a venting component 2, and an air inlet pipe 3 arranged sequentially. A flow-limiting baffle 6 is provided between the venting component 1 and the air inlet pipe 3. The air inlet pipe 3 is used to output the heat medium through the venting component 2 to the preheating component 1. The flow-limiting baffle 6 guides and restricts the heat medium from entering the venting component 2. The wall surface of the preheating component 1 is provided with a plurality of small holes 4, and the small holes 4 are arranged in a matrix on the wall surface of the preheating component 1 to form a spray surface. The size of the spray surface is used to correspond to the heating area of ​​the slam mold.

[0037] The industrial gas coming out of the intake pipe 3 enters the preheating component 1 through the ventilation component 2. The industrial gas leaks out through several small holes 4 arranged in a matrix on the preheating component 1, so that the industrial gas forms a spray surface on the periphery of the preheating component 1 and a combustion surface formed on the entire outside of the preheating component 1. The flame on the combustion surface is uniform, which can make the mold heat up evenly. The flow restrictor 6 can effectively control the flow rate of the industrial gas. The ventilation component 2 can effectively buffer the airflow of the industrial gas before it enters the preheating component 1.

[0038] The preheating device for the mold-dropping process of this invention can ensure stable and sufficient airflow and air pressure during the preheating and baking process, achieve uniform preheating of the mold-dropping process, and improve the safety factor.

[0039] In use, industrial gas passes through the flow-limiting baffle 6 between the inlet pipe 3 and the ventilation component 2, and then enters the internal gas cavity of the ventilation component 2 and the preheating component 1. The velocity decreases, the airflow is buffered, and the gas enters the internal gas cavity of the preheating component 1. It then diffuses through the small holes 4 on the preheating component 1 to the periphery of the preheating component 1. After ignition, a combustion surface is formed on the entire exterior of the preheating component 1. When the preheating component 1 is placed inside the mold-making cavity, the combustion surface simultaneously preheats the entire preheating area of ​​the mold-making cavity. This ensures uniform heating of the mold and prevents cracking caused by uneven heating.

[0040] As the amount of gas increases, it accumulates in the air cavity inside the ventilation component 2, ensuring a stable and sufficient airflow during the preheating and baking process, thus improving the safety factor.

[0041] Example 2

[0042] Based on Example 1, such as Figure 1 As shown, the preheating component 1 is a cylindrical structure with a closed front end, and multiple small holes 4 are provided through the cylindrical wall.

[0043] The front end of the preheating component 1 is closed, and several small holes 4 arranged in a matrix are opened on the cylinder wall. The small holes 4 form a spray surface relative to the preheating area of ​​the slam mold. At this time, the combustion surface of the preheating component 1 is concentrated on the outer surface of the cylinder wall. The slam mold consists of upper and lower molds. During preheating and baking, the preheating component 1 is placed in the slam mold cavity. The preheating component 1 only uniformly preheats the arc surface area of ​​the slam mold cavity. The front end of the preheating component 1 is closed, so no combustion surface is formed, thereby reducing heat loss and reducing energy waste.

[0044] The slamming mold consists of upper and lower molds. During preheating and baking, only the arc surface of the slamming mold cavity needs to be preheated. To reduce heat loss, the front end of the preheating component 1 is sealed so that the industrial gas entering the preheating component 1 forms a combustion surface only on the outer periphery of the preheating component 1 cylinder wall, ensuring uniform preheating of the slamming mold and reducing energy waste.

[0045] Example 3

[0046] Based on Example 2, such as Figure 3 As shown, the ventilation component 2 is a tubular structure. One end of the ventilation component 2 is fixedly connected to the open end of the preheating component 1, and the other end is fixedly connected to the end of the air inlet pipe 3.

[0047] The front end of the preheating component 1 is closed, and several small holes 4 arranged in a matrix are opened on the cylinder wall. The small holes 4 form a spray surface relative to the preheating area of ​​the slamming mold. At this time, the combustion surface of the preheating component 1 is concentrated on the outer surface of the cylinder wall. The slamming mold is an upper and lower mold. During preheating and baking, the preheating component 1 is placed in the slamming mold cavity. The preheating component 1 only preheats the arc surface of the slamming mold cavity evenly.

[0048] Ventilation component 2 is a hollow tubular structure. Ventilation component 2 fixes the preheating component 1 and the air inlet pipe 3 together. One end of ventilation component 2 is welded to the end of the preheating component 1 away from the closed end, and the other end is welded to the end of the air inlet pipe 3. At the same time, the gap at the joint is sealed by welding, so that the preheating component 1, ventilation component 2 and air inlet pipe 3 are internally connected and sealed at the connection to prevent leakage of industrial gas. The connection between ventilation component 2 and air inlet pipe 3 is reinforced with ribs on the outside, so that a rigid integral connection is formed on the outside, which facilitates the use of the preheating device, ensures the stability of the preheating device during use, and ensures the safety of the working environment.

[0049] Example 4

[0050] Based on Example 1, such as Figure 2 As shown, the flow-limiting baffle 6 has a flow-limiting hole 7.

[0051] After the industrial gas passes through the flow-limiting baffle 6 between the inlet pipe 3 and the ventilation component 2, a flow-limiting hole 7 is opened at the center of the flow-limiting baffle 6. The diameter of the hole is 1 / 20 of the diameter of the flow-limiting baffle 6. The industrial gas is slowly released into the gas chamber through the flow-limiting hole 7. After passing through the flow-limiting hole 7, the flow velocity of the gas is greatly reduced, achieving stable accumulation and buffering of the airflow in the gas chamber. Entering the internal gas chamber of the ventilation component 2 and the preheating component 1, the velocity decreases and the airflow is buffered. The gas enters the internal gas chamber of the preheating component 1 and diffuses to the periphery of the preheating component 1 through the small holes 4 on the preheating component 1. After ignition, a combustion surface is formed on the entire exterior of the preheating component 1. The preheating component 1 is placed in the molding cavity, and the combustion surface preheats the entire preheating area of ​​the molding cavity simultaneously.

[0052] Example 5

[0053] Based on Example 1, such as Figure 2 As shown, the inner diameter of the preheating component 1 is larger than the inner diameter of the venting component 2. The venting component 2 is used to disperse the heat medium into the preheating component 1 and reduce the flow rate of the heat medium.

[0054] Industrial gas passes through the flow-limiting baffle 6 between the inlet pipe 3 and the ventilation component 2, and then enters the internal gas cavity of the ventilation component 2 and the preheating component 1. The velocity decreases, the airflow is buffered, and the gas enters the internal gas cavity of the preheating component 1. It then diffuses through the small holes 4 on the preheating component 1 to the periphery of the preheating component 1. After ignition, a combustion surface is formed on the entire exterior of the preheating component 1. When the preheating component 1 is placed inside the molding cavity, the combustion surface simultaneously preheats the entire preheating area of ​​the molding cavity.

[0055] The ratio of the inner diameter of the preheating component 1 to the inner diameter of the ventilation component 2 is 3:2. The airflow enters the air chamber of the preheating component 1, which has a larger diameter, from the air chamber of the smaller-diameter ventilation component 2. Due to the increase in volume, the density of industrial fuel in the air chamber of the preheating component 1 will decrease, resulting in a decrease in the air pressure inside. This reduces the pressure of the industrial gas flowing out of the small hole 4, ensuring that the industrial gas can flow out of the small hole 4 smoothly, thus ensuring the complete and safe combustion of the industrial gas.

[0056] Example 6

[0057] Based on Example 1, such as Figure 1 As shown, an air intake valve 5 is provided on the air intake pipe 3.

[0058] An airflow valve 5 is installed on the air intake pipe 3. The airflow valve 5 controls the opening and closing of industrial gas. At the same time, the airflow valve 5 can control the gas pressure, flow rate and velocity of industrial gas entering the ventilation component 2, control ignition, extinguishing and realize real-time adjustment of flame size, thus improving the safety factor.

[0059] In use, the airflow valve 5 is opened, and industrial gas enters the ventilation component 2 through the air inlet pipe 3 and the flow-limiting baffle 6. After buffering, it enters the preheating component 1 and then leaks out through the small hole 4. After ignition, a combustion surface is formed on the outside of the preheating component 1 to uniformly preheat the mold. At this time, the airflow rate of the airflow valve 5 can be controlled according to the required firepower. With the flow-limiting effect of the flow-limiting baffle 6, the amount of industrial gas entering the preheating component 1 and the ventilation component 2 is guaranteed, which can maintain a stable required preheating temperature on the preheating component 1 and ensure the stability of the preheating process.

[0060] Example 7

[0061] Based on Example 1, such as Figure 3 As shown, a support frame 8 is fixed on the preheating component 1, and the support frame 8 is used to maintain the spraying distance between the preheating component 1 and the slamming mold.

[0062] Industrial gas passes through the flow-limiting baffle 6 between the inlet pipe 3 and the ventilation component 2, then enters the internal gas cavity of the ventilation component 2 and the preheating component 1. The velocity decreases, the airflow is buffered, and the gas enters the internal gas cavity of the preheating component 1. It diffuses through the small holes 4 on the preheating component 1 to the periphery of the preheating component 1. After ignition, a combustion surface is formed on the entire exterior of the preheating component 1. The preheating component 1 is placed in the mold preheating area, and a support frame 8 is fixed to it. The support frame 8 consists of three cylindrical steel columns, one end of which is welded around the exterior of the preheating component 1. In use, the preheating component 1 is placed in the mold preheating area, and the support frame 8 stably supports the preheating component 1 within the mold, creating an airflow jet gap between the preheating component 1 and the mold, forming a combustion space. The combustion surface simultaneously preheats the entire mold cavity preheating area, ensuring smooth preheating and baking.

[0063] Example 8

[0064] Based on Example 7, such as Figure 3 As shown, the support frame 8 is perpendicular to the preheating component 1.

[0065] The three steel columns of the support frame 8 are welded and fixed perpendicularly to the outside of the preheating component 1. The support frame 8 stably supports the preheating component 1 inside the mold, ensuring the smooth progress of preheating and baking.

[0066] The number and diameter of the small holes 4 on the preheating component 1, the diameter, position and number of the flow-limiting holes 7, and the shape and specifications of the support frame 8 can be set according to actual needs. The ratio of the inner diameter of the preheating component 1 to the inner diameter of the ventilation component 2 is not limited to the above ratio and can be adjusted according to actual production needs.

Claims

1. A preheating device for mold making, characterized in that, It includes a preheating component (1), a ventilation component (2), and an air inlet pipe (3) arranged sequentially. A flow-limiting baffle (6) is provided between the ventilation component (2) and the air inlet pipe (3); the air inlet pipe (3) is used to output the heat medium through the ventilation component (2) to the preheating component (1); the flow-limiting baffle (6) guides and restricts the heat medium from entering the ventilation component (2); The preheating component (1) has several small holes (4) on its wall surface, and the small holes (4) are arranged in a matrix on the wall surface of the preheating component (1) to form a spray surface; wherein the size of the spray surface is used to correspond to the heating area of ​​the mold.

2. The preheating device for mold making according to claim 1, characterized in that, The preheating component (1) is a cylindrical structure with a closed front end, and multiple small holes (4) are provided through the cylindrical wall.

3. The preheating device for mold slamming according to claim 2, characterized in that, The ventilation component (2) is a tubular structure. One end of the ventilation component (2) is fixedly connected to the open end of the preheating component (1), and the other end is fixedly connected to the end of the air inlet pipe (3).

4. The preheating device for mold making according to claim 1, characterized in that, The flow-limiting baffle (6) has a flow-limiting hole (7).

5. The preheating device for mold making according to claim 1, characterized in that, The inner diameter of the preheating component (1) is larger than the inner diameter of the ventilation component (2). The ventilation component (2) is used to disperse the heat medium into the preheating component (1) and reduce the flow rate of the heat medium.

6. The preheating device for mold making according to claim 1, characterized in that, An airflow valve (5) is provided on the air intake pipe (3).

7. The preheating device for mold making according to claim 1, characterized in that, The preheating component (1) is fixed with a support frame (8), which is used to maintain the spraying distance between the preheating component (1) and the slamming mold.

8. The preheating device for mold slamming according to claim 7, characterized in that, The support frame (8) is perpendicular to the outer surface of the preheating component (1).

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