Intelligent inner cooling type stamping die for luggage pull rod production

Abstract

This invention relates to the field of stamping die technology, and more particularly to an intelligent internally cooled stamping die for producing luggage handles. The die includes a lower die and an upper die. The lower die contains a cooling plate with two symmetrically distributed cooling channels. Each cooling channel has an inlet and an outlet on its right side. Each inlet is connected to the right wall of the lower die via a cooling inlet pipe, and each outlet is connected to the right wall of the lower die via a cooling return pipe. The lower die also contains a cooling assembly. This die utilizes the closing and opening actions to drive the reciprocating motion of a sealed piston head within the piston cylinder, generating a high-pressure airflow that is ejected through first and second air outlets and acts on a high-efficiency heat-conducting plate on the outer wall of the cooling return pipe. Combined with a split airflow channel and a guide slope, this enhances heat exchange efficiency, compensates for insufficient heat dissipation from external cooling equipment, and significantly reduces the coolant temperature.

Description

Technical Field

[0001] This invention relates to the field of stamping die technology, and in particular to an intelligent internal cooling stamping die for producing luggage handles. Background Technology

[0002] In the high-speed stamping production of metal handle components for luggage pull rods (such as riveted lugs and limiting springs), internally cooled stamping dies are commonly used to ensure dimensional accuracy and die life. Continuous cooling of the die through built-in cooling water channels and external circulating cooling equipment has become a standard technical method in the industry.

[0003] A typical internal cooling system includes channels located inside the mold, an external water pump, a coolant tank, and a heat exchange device. During operation, the coolant flows through the high-temperature mold area, absorbs heat, returns to the cooling equipment, dissipates heat, and is then recycled to maintain a stable mold temperature. This passive circulation cooling method can control the mold temperature rise to some extent. However, during continuous high-speed stamping, the coolant's temperature gradually rises due to repeated heat absorption, leading to a continuous decrease in its heat exchange efficiency with the mold. Simultaneously, external cooling equipment (such as small water tanks or heat exchangers) is limited by size and cost, resulting in limited heat dissipation capacity and difficulty in quickly and adequately cooling the high-temperature coolant. This causes the actual operating temperature of the mold to rise slowly, affecting the dimensional stability of the stamped parts, accelerating mold wear, and even causing mold sticking failure. Currently, there is a lack of a simple, energy-efficient, and effective solution to further reduce the coolant temperature using existing cooling equipment.

[0004] Therefore, how to utilize the mechanical energy generated by the stamping action to achieve auxiliary air cooling without changing the main structure of the existing cooling system, thereby more efficiently maintaining the low temperature of the coolant, is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] In order to overcome the shortcomings of existing internally cooled stamping dies, such as rapid temperature rise due to repeated heat absorption by the coolant during continuous high-speed stamping and limited heat dissipation capacity of external cooling equipment, resulting in a continuous rise in the working temperature of the die, this invention provides an intelligent internally cooled stamping die for the production of luggage handles.

[0006] A smart internally cooled stamping die for producing luggage handles includes a lower die and an upper die. The lower die has a cooling plate with two symmetrically distributed cooling channels. Each cooling channel has an inlet and an outlet on its right side. Each inlet is connected to the right wall of the lower die via a cooling inlet pipe, and each outlet is connected to the right wall of the lower die via a cooling return pipe. The lower die also has a cooling assembly that uses the stamping action of the upper die to generate airflow to provide auxiliary air cooling for the cooling return pipes.

[0007] Preferably, the cooling assembly includes piston cylinders symmetrically installed on the left and right sides of the lower mold. Each piston cylinder has a vertically sliding drive piston rod at its top, and the lower end of each drive piston rod slides vertically within the corresponding piston cylinder. The bottom end of each drive piston rod has a sealing piston head that seals against the inner wall of the piston cylinder. The sealing piston head divides the inner cavity of the piston cylinder into an upper air storage chamber and a lower compression chamber. The upper part of each drive piston rod is connected to the lower mold via two return springs. The left and right sides of the lower mold are fixedly connected with symmetrical first air outlets, and each first air outlet is connected to the lower compression chamber of the corresponding piston cylinder via a first vent pipe.

[0008] Preferably, the lower mold has guide pillars symmetrically distributed front and back fixedly connected to both the left and right sides, and the upper mold has guide holes at corresponding positions; the drive piston rod is slidably connected to the corresponding guide pillar.

[0009] Preferably, each piston cylinder is equipped with a first check valve at the top to control the air intake of the upper air storage chamber; and each piston cylinder is equipped with a second check valve at the bottom to control the air intake of the lower compression chamber.

[0010] Preferably, each first air outlet is also fixedly connected to a second air outlet, and each second air outlet is connected to the upper air storage chamber of the corresponding piston cylinder through a second vent pipe.

[0011] Preferably, each cooling return pipe has a high-efficiency heat-conducting plate fixedly connected to its S-shaped section. The high-efficiency heat-conducting plate has a uniformly distributed flow channel inside, and a flow-guiding slope is provided in the middle of the high-efficiency heat-conducting plate.

[0012] Preferably, the two cooling channels symmetrically distributed in front and behind the cooling plate are both S-shaped structures; the diversion air duct is arranged horizontally and evenly distributed along the longitudinal direction, and the guide slope is located at the outlet of the diversion air duct and is symmetrically distributed from left to right.

[0013] Preferably, the system also includes a sealing detection assembly, which includes a detection piston rod that is vertically slidably connected to each of the first vent pipes. The top end of each detection piston rod protrudes from the corresponding first vent pipe and is fixedly connected to a visual indicator rod. Each visual indicator rod slides up and down within the top wall of the lower mold.

[0014] The beneficial effects of this invention are as follows: This mold utilizes the mold closing and opening actions of the upper mold during the stamping process to drive the reciprocating motion of the sealed piston head inside the piston cylinder, automatically generating high-pressure airflow which is ejected through the first and second air outlets and directly acts on the high-efficiency heat-conducting plate on the outer wall of the cooling return pipe; combined with the multi-stream airflow design of the split air duct and the guide slope, the contact efficiency between the air and the heat exchange surface is greatly enhanced, effectively compensating for the insufficient heat dissipation capacity of the external cooling equipment and significantly reducing the temperature of the coolant.

[0015] This mold requires no external air source or independent fan. It relies entirely on the mechanical energy of the stamping action itself to drive the airflow, achieving "self-powered" auxiliary air cooling. During continuous high-speed stamping, each mold closing and opening automatically completes a full compression, air jet, and air intake cycle without consuming additional electricity or compressed air. This reduces the operating cost of the mold and conforms to the industrial development trend of green manufacturing and energy conservation.

[0016] This mold is equipped with a sealing detection component. The exposure status of the visual indicator rod during mold closing directly reflects the sealing performance between the sealing piston head and the piston cylinder. When the seal wears and causes air leakage, the operator can immediately detect the abnormal exposure of the indicator rod and stop the machine for maintenance in time to avoid a decrease in cooling effect due to insufficient air pressure. This function improves the convenience of mold operation and maintenance and the long-term reliability of operation, ensuring the stable and efficient operation of the stamping cooling system. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the lower mold, guide pillars, and cooling plate components of the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the cooling plate, cooling inlet pipe, and cooling return pipe of the present invention.

[0020] Figure 4 This is a three-dimensional structural diagram of the components of the present invention, including the driving piston rod, piston cylinder, and first air outlet.

[0021] Figure 5 This is a three-dimensional structural diagram of the piston cylinder, the first one-way valve, and the second one-way valve of the present invention.

[0022] Figure 6 This is a three-dimensional structural diagram of the piston cylinder, the second vent pipe, and the second air outlet of the present invention.

[0023] Figure 7 This is a three-dimensional structural diagram of the high-efficiency heat-conducting plate and cooling return pipe of the present invention.

[0024] Figure 8 This is a three-dimensional structural diagram of the high-efficiency heat-conducting plate of the present invention.

[0025] Figure 9 This is a three-dimensional structural diagram of the components of the present invention, including the first vent tube, the detection piston rod, and the visualization indicator rod.

[0026] In the attached diagram, the following are the reference numerals: 101, lower mold; 102, upper mold; 103, cooling plate; 1031, cooling channel; 1032, liquid inlet; 1033, liquid outlet; 104, guide post; 105, cooling liquid inlet pipe; 1051, cooling liquid return pipe; 106, piston cylinder; 107, drive piston rod; 1071, sealing piston head; 108, first vent pipe; 109, first air outlet; 110, return spring; 201, first one-way valve; 202, second one-way valve; 203, second vent pipe; 204, second air outlet; 301, high-efficiency heat-conducting plate; 302, diversion air duct; 303, guide slope; 401, detection piston rod; 402, visual indicator rod. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1: A smart internal cooling stamping die for producing luggage handles, such as... Figures 1-3 As shown, it includes a lower mold 101 and an upper mold 102. The lower mold 101 is installed on the worktable of the press and is fixed by a pressure plate and bolt fasteners. The upper mold 102 is installed on the slide of the press and moves up and down with the slide to complete the stamping action.

[0029] The lower mold 101 has four guide pillars 104 fixedly connected to its left and right sides, which are symmetrically distributed front and back. The upper mold 102 has guide holes at corresponding positions. When the upper mold 102 moves downward with the slider and covers the lower mold 101, the guide holes of the upper mold 102 pass through the guide pillars 104 to realize the guiding function of vertical movement.

[0030] A cooling plate 103 is fixedly connected to the inner side of the top wall of the lower mold 101. Two sets of S-shaped cooling channels 1031 are symmetrically distributed within the cooling plate 103. Each cooling channel 1031 has an inlet 1032 and an outlet 1033 on its right side. Each inlet 1032 is connected to the right wall of the lower mold 101 via a cooling inlet pipe 105; each outlet 1033 is connected to the right wall of the lower mold 101 via a cooling return pipe 1051. Each cooling return pipe 1051 is S-shaped within the lower mold 101, with its S-shaped section located directly below the cooling plate 103, for discharging the cooled liquid after heat absorption.

[0031] The lower mold 101 is equipped with a cooling component for blowing air to cool the outer wall of the cooling return pipe 1051.

[0032] like Figures 4-6 As shown, the cooling assembly includes piston cylinders 106 symmetrically installed on the left and right sides of the lower mold 101, with each piston cylinder 106 located directly below a corresponding guide post 104. A drive piston rod 107 is vertically slidably connected to each guide post 104, and the lower end of each drive piston rod 107 passes through the top wall of the lower mold 101 and slides vertically within the corresponding piston cylinder 106. A sealing piston head 1071 is provided at the bottom end of each drive piston rod 107, which seals against the inner wall of the piston cylinder 106, dividing the inner cavity of the piston cylinder 106 into an upper gas storage chamber and a lower compression chamber.

[0033] Each drive piston rod 107 is connected to the lower mold 101 by two return springs 110. Each return spring 110 is wound around the corresponding drive piston rod 107 to provide the elastic force required for the drive piston rod 107 to return.

[0034] The lower mold 101 has two fixedly connected left and right sides with symmetrically distributed first air outlets 109. The S-shaped section of the cooling return pipe 1051 is located between the four first air outlets 109. Each first air outlet 109 is connected to the lower compression chamber of the adjacent piston cylinder 106 through a first vent pipe 108, which is used to guide the gas in the compression chamber to the first air outlet 109 and spray it out.

[0035] Each piston cylinder 106 is equipped with a first check valve 201 at its upper part to control the air intake of the upper air storage chamber; each piston cylinder 106 is equipped with a second check valve 202 at its lower part to control the air intake of the lower compression chamber.

[0036] Each first air outlet 109 is also fixedly connected to a second air outlet 204. Each second air outlet 204 is connected to the upper air storage chamber of the adjacent piston cylinder 106 through a second vent pipe 203, which is used to guide the gas in the upper air storage chamber to the second air outlet 204 and spray it out.

[0037] like Figure 7 and Figure 8 As shown, each cooling return pipe 1051 has a high-efficiency heat-conducting plate 301 fixedly connected to its S-shaped section. Each high-efficiency heat-conducting plate 301 has evenly distributed diversion air ducts 302 longitudinally distributed on both its left and right sides, and these diversion air ducts 302 are arranged laterally. At the outlet of each diversion air duct 302, a guide slope 303 is provided in the middle of each high-efficiency heat-conducting plate 301. The high-efficiency heat-conducting plate 301 is used to quickly conduct and dissipate the heat from the cooling return pipe 1051.

[0038] The mold also includes a sealing detection component for detecting the sealing performance between the sealing piston head 1071 and the piston cylinder 106. For example... Figure 2 and Figure 9 As shown, the sealing detection assembly includes a detection piston rod 401 that is vertically slidably connected to each of the first vent pipes 108. The top end of each detection piston rod 401 passes through the corresponding first vent pipe 108 and is fixedly connected to a visual indicator rod 402. Each visual indicator rod 402 slides up and down within the top wall of the lower mold 101.

[0039] Working principle: When this mold is working, an external water pump pumps coolant into the mold through the coolant inlet pipe 105. The coolant flows through the S-shaped cooling channel 1031 and the coolant return pipe 1051 within the cooling plate 103 before returning to the external cooling equipment, forming a basic cycle. During continuous high-speed stamping, the coolant repeatedly absorbs heat, causing its temperature to rise. The limited heat dissipation capacity of the external cooling equipment leads to an increase in the mold's working temperature.

[0040] To address this issue, this mold utilizes the mechanical energy of the stamping action itself to drive auxiliary air cooling. The specific process is as follows: The upper mold 102 presses down, driving the piston rod 107, compressing the return spring 110. The sealed piston head 1071 moves downward within the piston cylinder 106, compressing the air in the lower compression chamber. The second one-way valve 202 closes, and the compressed air is sent through the first vent pipe 108 to the first air outlet 109 and ejected at high speed. Simultaneously, the volume of the upper air storage chamber increases, generating negative pressure. External air is drawn in through the first one-way valve 201, preparing for the mold opening and air ejection.

[0041] The upper mold 102 rises, and the return spring 110 pushes the drive piston rod 107 and the sealing piston head 1071 to return to their original position. The air in the upper air storage chamber is compressed, the first one-way valve 201201 closes, and the compressed air is sent to the second air outlet 204 through the second vent pipe 203 and ejected at high speed. At the same time, a negative pressure is generated in the lower compression chamber, and external air is drawn in through the second one-way valve 202 to prepare for the next mold closing compression.

[0042] The heat from the high-temperature coolant is transferred to the high-efficiency heat-conducting plate 301 through the outer wall of the coolant return pipe 1051. The high-speed airflow ejected from the first air outlet 109 and the second air outlet 204 acts on the high-efficiency heat-conducting plate 301, is divided into multiple streams by the split airflow duct 302, and then discharged through the guide slope 303, ensuring that the airflow fully contacts the surfaces of the heat-conducting plate and the return pipe, significantly improving heat dissipation efficiency. During the alternating process of mold closing and opening, auxiliary air cooling without additional energy consumption is achieved, effectively reducing the coolant temperature.

[0043] The sealing detection component operates only during the mold closing and compression stage. When the sealing performance is good, all the gas in the lower compression chamber is forced into the first vent pipe 108, increasing the air pressure and lifting the detection piston rod 401 and the visual indicator rod 402, causing the indicator rod to protrude from the top wall of the lower mold 101. When the sealing performance is poor, air leakage leads to insufficient air pressure, preventing the indicator rod from protruding properly. Operators can determine the sealing performance by observing the status of the indicator rod and perform timely maintenance.

[0044] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention are existing technologies known to those skilled in the art.

Claims

1. A smart internal cooling stamping die for producing luggage trolley rods, characterized in that, The device includes a lower mold (101) and an upper mold (102). The lower mold (101) is provided with a cooling plate (103). The cooling plate (103) has two cooling channels (1031) symmetrically distributed front and back. Each cooling channel (1031) has an inlet (1032) and an outlet (1033) on its right side. Each inlet (1032) is connected to the right wall of the lower mold (101) through a cooling inlet pipe (105), and each outlet (1033) is connected to the right wall of the lower mold (101) through a cooling return pipe (1051). The lower mold (101) is also provided with a cooling assembly. The cooling assembly is driven by the stamping action of the upper mold (102) to generate airflow and provide auxiliary air cooling for the cooling return pipe (1051).

2. The intelligent internal cooling stamping die for producing luggage handles as described in claim 1, characterized in that, The cooling assembly includes piston cylinders (106) symmetrically installed on the left and right sides of the lower mold (101). Each piston cylinder (106) has a vertically sliding drive piston rod (107) above it. The lower end of each drive piston rod (107) slides vertically within the corresponding piston cylinder (106). The bottom end of each drive piston rod (107) has a sealing piston head (1071) that seals against the inner wall of the piston cylinder (106). The head (1071) divides the inner cavity of the piston cylinder (106) into an upper air storage chamber and a lower compression chamber; the upper part of each driving piston rod (107) is connected to the lower mold (101) by two return springs (110); the left and right parts of the lower mold (101) are fixedly connected with symmetrical first air outlets (109), and each first air outlet (109) is connected to the lower compression chamber of the corresponding piston cylinder (106) by a first vent pipe (108).

3. The intelligent internal cooling stamping die for producing luggage handles as described in claim 2, characterized in that, The lower mold (101) is fixedly connected to guide pillars (104) that are symmetrically distributed front and back on both the left and right sides, and the upper mold (102) is provided with guide holes at the corresponding positions; the driving piston rod (107) is slidably connected to the corresponding guide pillar (104).

4. The intelligent internal cooling stamping die for producing luggage handles as described in claim 3, characterized in that, Each piston cylinder (106) is equipped with a first check valve (201) at the top to control the air intake of the upper air storage chamber; each piston cylinder (106) is equipped with a second check valve (202) at the bottom to control the air intake of the lower compression chamber.

5. The intelligent internal cooling stamping die for producing luggage handles as described in claim 4, characterized in that, Each first air outlet (109) is also fixedly connected to a second air outlet (204), and each second air outlet (204) is connected to the upper air storage chamber of the corresponding piston cylinder (106) through a second vent pipe (203).

6. The intelligent internal cooling stamping die for producing luggage handles as described in claim 5, characterized in that, Each cooling return pipe (1051) has a high-efficiency heat-conducting plate (301) fixedly connected to the S-shaped section. The high-efficiency heat-conducting plate (301) has a uniformly distributed diversion air duct (302) inside, and a guide slope (303) is provided in the middle of the high-efficiency heat-conducting plate (301).

7. The intelligent internal cooling stamping die for producing luggage handles as described in claim 6, characterized in that, The two cooling channels (1031) symmetrically distributed in the cooling plate (103) are both S-shaped structures; the diversion air duct (302) is arranged horizontally and evenly distributed along the longitudinal direction, and the guide slope (303) is located at the outlet of the diversion air duct (302) and is symmetrically distributed on the left and right.

8. The intelligent internal cooling stamping die for producing luggage handles as described in claim 7, characterized in that, It also includes a sealing detection assembly, which includes a detection piston rod (401) that is vertically slidably connected to each of the first vent pipes (108). The top end of each detection piston rod (401) passes through the corresponding first vent pipe (108) and is fixedly connected to a visual indicator rod (402). Each visual indicator rod (402) slides up and down within the top wall of the lower mold (101).

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