Low-pressure casting mold and casting method for aluminum casting with complex inner cavity

Abstract

A low-pressure casting mold for an aluminum casting with a complex inner cavity comprises inserts, the inserts comprise an upper mold insert and a lower mold insert, the upper mold insert and the lower mold insert are each provided with a plurality of independent mold cavities, the upper mold insert and the lower mold insert form a plurality of independent closed mold cavities after mold closing, and the upper mold insert and the lower mold insert are arranged in the closed mold cavities. Each closed cavity is provided with a group of cooling devices and a sprue, the sprues of all the closed cavities are connected with the same sprue basin, the sprues are located at the bottoms of all the closed cavities and supported on a sprue basin cover arranged above the sprue basin, and projections of all the sprues in the vertical direction fall into an opening area at the upper end of the sprue basin. The molten aluminum rises into the pouring basin through a liquid rising pipe of the low-pressure casting machine and enters each independent closed cavity through a pouring gate; and the sand core is arranged in the closed cavity and is used for forming an inner cavity in the casting.

Description

Technical Field

[0001] The invention relates to the field of low-pressure casting, and in particular to a low-pressure casting mold and a casting method for a complex inner cavity aluminum casting. Background Art

[0002] In the process of producing mechanical equipment such as lawn mowers, in order to meet high performance requirements, it is necessary to produce an aluminum oil circuit control valve that can withstand high pressure. This aluminum oil circuit control valve is usually a complex inner cavity aluminum casting with complex structure, diverse inner cavity, precise size, sand core installation during production, and needs to withstand high pressure during use.

[0003] At present, this type of complex inner cavity aluminum casting is usually produced by gravity casting. However, the gravity casting process has the defect of insufficient density of the casting, which makes it unable to withstand high pressure, and thus makes the produced aluminum oil circuit control valve have the risk of oil leakage. In order to reduce the risk of oil leakage, the existing technology usually adopts the method of increasing the wall thickness of the product to improve it. However, this method not only significantly increases the use of aluminum materials and increases the manufacturing cost, but also leads to an increase in the overall volume of the workpiece, affecting the lightweight design requirements of the equipment.

[0004] In contrast, the low-pressure casting process, that is, a casting method that uses a riser to make the molten metal rise to fill the mold and control the solidification, can significantly improve the density of aluminum castings without increasing the wall thickness of the product, thereby effectively solving the risk of oil leakage. However, the production cost of low-pressure casting is relatively high, especially in the single-mold single-piece production mode, the economy is poor. For this reason, the prior art proposes a method of producing multiple groups of castings through one mold to reduce the unit production cost of low-pressure casting.

[0005] For example, patent document CN119057039A discloses a low-pressure casting method and mold for a water pump housing. Although this technical solution has achieved the production of multiple groups of castings in one mold to a certain extent, it still has the following limitations: first, the low-pressure casting method does not involve the process of hoisting sand cores, so it cannot be applied to the production of aluminum castings with complex inner cavities; second, the inner cavity of the mold is a non-independent cavity structure, resulting in the production of multiple groups of castings being integrally formed, requiring additional cutting and grinding, which increases the workload and cost of subsequent processing. Summary of the invention

[0006] The purpose of the present invention is to provide a low-pressure casting method and mold for complex inner cavity aluminum castings in view of the corresponding deficiencies in the prior art; the low-pressure casting method comprises pre-making sand cores, installing the pre-made sand cores in the respective cavities of the upper mold insert and / or the lower mold insert, starting the low-pressure casting machine, and casting the complex inner cavity aluminum casting through the liquid raising stage, the filling stage, the pressurizing stage, the pressure holding stage, and the cooling stage; the low-pressure casting mold for the complex inner cavity aluminum casting, the upper mold insert and the lower mold insert of the low-pressure casting mold form a plurality of independent closed cavities after being molded together, and a sand core is arranged, thereby producing a plurality of independent complex inner cavity aluminum castings at one time.

[0007] The technical solution of the present invention is achieved in this way: A low-pressure casting mold for a complex inner cavity aluminum casting, comprising inserts, the inserts comprising an upper mold insert and a lower mold insert, the upper mold insert and the lower mold insert are both provided with a plurality of mutually independent cavities, the upper mold insert and the lower mold insert are molded together to form a plurality of independent closed cavities, each closed cavity is provided with a group of cooling devices and a pouring gate, the pouring gates of all the closed cavities are connected to the same pouring basin, the pouring gate is located at the bottom of each closed cavity, supported on a pouring basin cover provided above the pouring basin, the vertical projection of each pouring gate falls into the upper end opening area of ​​the pouring basin, the aluminum liquid rises into the pouring basin through a liquid riser of a low-pressure casting machine, and enters each independent closed cavity through the pouring gate; A sand core is arranged in a closed mold cavity and is used to form an inner cavity in the casting.

[0008] Preferably, the pouring basin is funnel-shaped, the upper end of which is connected to each closed cavity through a pouring gate, and the lower end of which is connected to a riser pipe, and the opening area of ​​the upper end of the pouring basin is larger than the opening area of ​​the lower end.

[0009] Preferably, the pouring basin is made of ceramic material.

[0010] Preferably, the sand core is made by assembling a plurality of independent sand cores.

[0011] Preferably, the cooling device is arranged in a convex mold provided in the upper mold insert and / or the lower mold insert, and the convex mold is used to form the inner surface of the complex inner cavity aluminum casting.

[0012] Preferably, the cooling device is a water cooling device, and the cooling pipe of the water cooling device is arranged in the upper mold insert and / or the lower mold insert, and is connected to an external water source through a water inlet interface.

[0013] A low-pressure casting method for complex inner cavity aluminum castings comprises the following steps: S1: Prefabricate multiple sand cores for occupying the inner space of the closed mold cavity, and set the prefabricated sand cores in each mold cavity of the upper mold insert and / or the lower mold insert. After the sand cores are set, use a sand blowing process to blow away the remaining sand in each independent mold cavity, and close the upper mold insert with the lower mold insert to form multiple closed mold cavities; S2: Set the operating parameters of each casting stage on the controller of the low-pressure casting equipment, and run the low-pressure casting machine. The low-pressure casting machine starts to pressurize, so that the aluminum liquid rises to the pouring basin through the rising pipe of the low-pressure casting machine, and continues to pressurize, so that the aluminum liquid enters each independent closed cavity through the pouring gate, maintains the pressure, and gradually solidifies the aluminum liquid in the closed cavity, and starts the cooling device in time to cool the casting; S3: After maintaining the pressure for a certain period of time, release the pressure at the right time, and keep the cooling device on to cool the casting; after the casting has cooled for a certain period of time, close the cooling device at the right time, and the casting begins to cool naturally in the closed cavity; after the casting has cooled naturally for a certain period of time, separate the upper mold insert and the lower mold insert at the right time, and take out the aluminum casting with a complex inner cavity.

[0014] Preferably, the casting stages include, in sequence, a liquid raising stage, a mold filling stage, a pressurizing stage, a pressure holding stage, and a cooling stage; In the liquid raising stage, the low-pressure casting machine pressurizes at a relatively high pressurization speed, so that the aluminum liquid passes through the liquid raising pipe of the low-pressure casting machine and quickly rises into the pouring basin, and the pressure reaches a predetermined liquid raising pressure; In the filling stage, the low-pressure casting machine pressurizes at a relatively low speed, so that the self-gating basin rises slowly, gradually enters each independent closed cavity through the gate, and makes the pressure reach a predetermined filling pressure; In the pressurization stage, the low-pressure casting machine pressurizes at an extremely high pressurization speed so that the pressure quickly reaches the predetermined holding pressure; In the pressure holding stage, the pressure holding pressure is maintained, and the aluminum liquid gradually solidifies in the closed cavity, and when the predetermined cooling device opening time is reached, the cooling device is opened; In the cooling stage, when the predetermined pressure holding end time is reached, the pressure is released, and when the predetermined cooling device end time is reached, the cooling device is closed to allow the casting to cool naturally in the closed cavity; When the predetermined mold opening time is reached, the upper mold insert and the lower mold insert are separated and the complex inner cavity aluminum casting is taken out.

[0015] Preferably, the initial pouring temperature of the complex inner cavity aluminum casting is controlled at 690° C. to 720° C.; and / or The casting temperature of the complex inner cavity aluminum casting is controlled at 300° C. to 500° C.; and / or The pressurization speed in the liquid raising stage is 16 mbar / s to 18 mbar / s, and the liquid raising pressure is 140 mbar to 180 mbar; and / or The pressurization speed in the filling stage is 6mbar / s to 8mbar / s, and the filling pressure is 200mbar to 240mbar; and / or The pressurization speed in the pressurization stage is 20 mbar / s to 25 mbar / s, and the holding pressure is 260 mbar to 280 mbar.

[0016] Preferably, the timing starts from when the low-pressure casting machine starts pressurizing at a lower pressurizing speed; Timing the 60th to 70th second is the start time of the cooling device in the pressure holding stage; and / or The 100s to 110s are counted as the end time of the pressure holding in the cooling stage; and / or Timing the time from 110s to 120s is the end time of the cooling device in the cooling stage; and / or The timing from 140s to 160s is the mold opening time.

[0017] Beneficial effects of the present invention: The low-pressure casting process is used to produce complex inner cavity aluminum castings. Compared with traditional gravity casting, the complex inner cavity aluminum castings produced have good product quality, high structural density and good pressure resistance.

[0018] Setting sand cores can form complex inner cavities in aluminum castings. The sand cores are made of multiple independent sand cores assembled together, which can be assembled quickly, reducing the time for setting the sand cores in the mold cavity and preventing the temperature of the insert from dropping too much due to the long time of setting the sand cores, thereby reducing the quality of the complex inner cavity aluminum castings and reducing production efficiency.

[0019] The upper mold insert and the lower mold insert form multiple independent closed cavities after being molded together. A set of molds can produce multiple independent complex inner cavity aluminum castings at a time without cutting and separation, reducing the processing workload and cost.

[0020] The pouring basin is made of ceramic material, which has good thermal insulation effect, can significantly reduce the temperature drop of aluminum liquid in the pouring basin, enhance the shrinkage compensation ability of the pouring basin, and thus effectively avoid the occurrence of shrinkage defects.

[0021] The cooling device is arranged in the convex mold of the upper mold insert and / or the lower mold insert. On the one hand, it increases the contact area between the cooling device and the complex inner cavity aluminum casting, and on the other hand, it penetrates deep into the complex inner cavity aluminum casting to cool down and accelerate the heat dissipation speed.

[0022] In the liquid raising stage, the low-pressure casting machine pressurizes at a relatively high pressurization speed, the temperature drop of the aluminum liquid is relatively small, and the flow of the aluminum liquid is kept stable, which can effectively avoid the entrapment of gas and impurities; in the mold filling stage, the low-pressure casting machine pressurizes at a relatively low pressurization speed, thereby preventing turbulence and the entrapment of gas and impurities; in the pressurization stage, the low-pressure casting machine pressurizes at an extremely high pressurization speed, so that the aluminum liquid solidifies quickly under pressure conditions, thereby forming a dense casting structure.

[0023] Releasing the pressure at the right time and continuously opening the cooling device to cool the casting can achieve sequential solidification of the casting, reduce shrinkage defects, and quickly reduce the casting temperature to a suitable temperature for opening the mold and removing the casting, thereby significantly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the lower mold insert in the present invention; Figure 2 It is a schematic diagram of the structure of the insert in the present invention; Figure 3 for Figure 2 AA section view; Figure 4 It is a schematic diagram of the sand core structure in the present invention; Figure 5 Flow chart of the low pressure casting method for complex internal cavity aluminum castings. DETAILED DESCRIPTION

[0025] like Figures 1 to 4 As shown, a low-pressure casting mold for a complex inner cavity aluminum casting includes an insert 1, wherein the insert 1 includes an upper mold insert 2 arranged in an upper mold support plate and a lower mold insert 3 arranged in a lower mold support plate, wherein the upper mold insert 2 and the lower mold insert 3 are both provided with a plurality of mutually independent cavities 4, and the upper mold insert 2 and the lower mold insert 3 form a plurality of independent closed cavities 5 after being molded together, and each closed cavity 5 is provided with a group of cooling devices 11 and a gate 6.

[0026] The cooling device 11 in this embodiment is a water cooling device, the cooling pipe of the water cooling device is arranged in the upper mold insert 2 and / or the lower mold insert 3, and is connected to the external water source through the water inlet interface 10. The cooling device 11 is arranged in the punch 9 provided in the upper mold insert 2 and / or the lower mold insert 3, and the punch 9 is used to form the inner surface of the inner cavity, holes, etc. of the complex inner cavity aluminum casting. On the one hand, this design increases the contact area between the cooling device and the complex inner cavity aluminum casting, and on the other hand, it penetrates deep into the complex inner cavity aluminum casting for cooling and cooling, thereby accelerating the heat dissipation speed.

[0027] The gates 6 of all the closed cavities 5 are connected to the same pouring basin 7, and the gate 6 is located at the bottom of each closed cavity 5, and is supported on a pouring basin cover 13 provided above the pouring basin 7. In this embodiment, the number of closed cavities 5 is 4, and the number of gates 6 is the same as the number of closed cavities 5, which is 4. They are arranged around the center of the pouring basin cover 13, and a hemispherical diversion protrusion is provided downward at the center of the pouring basin cover 13, and the hemispherical diversion protrusion has a drainage effect on the rising aluminum liquid.

[0028] The pouring basin 7 is funnel-shaped and made of ceramic material. The pouring basin made of ceramic material has good thermal insulation effect, can significantly reduce the temperature drop of aluminum liquid in the pouring basin, and enhance the shrinkage compensation ability of the gate, thereby effectively avoiding the occurrence of shrinkage defects. The bracket fixes the pouring basin 7 in the lower mold base plate, and the upper end is connected with each closed cavity 5 through the gate 6, and the lower end is connected with the riser 12. The opening area of ​​the upper end of the pouring basin 7 is larger than the opening area of ​​the lower end, and the vertical projections of each gate 6 fall into the opening area of ​​the upper end of the pouring basin 7.

[0029] The aluminum liquid rises into the pouring basin 7 through the rising pipe 12 of the low-pressure casting machine, and enters each independent closed cavity 5 through the pouring gate 6; The sand core 8 is made by assembling a plurality of independent sand cores 14. The assembled sand core 8 is arranged in a closed mold cavity to form an inner cavity in the casting.

[0030] A low pressure casting method for a complex inner cavity aluminum casting as claimed in claim 1, comprising the following steps: S1: Prefabricate multiple sand cores for occupying the inner space of the closed mold cavity, and set the prefabricated sand cores in each mold cavity of the upper mold insert and / or the lower mold insert. After the sand cores are set, use a sand blowing process to blow away the remaining sand in each independent mold cavity, and close the upper mold insert with the lower mold insert to form multiple closed mold cavities; S2: Set the operating parameters of each casting stage on the controller of the low-pressure casting equipment, and run the low-pressure casting machine. The low-pressure casting machine starts to pressurize, so that the aluminum liquid rises to the pouring basin through the rising pipe of the low-pressure casting machine, and continues to pressurize, so that the aluminum liquid enters each independent closed cavity through the pouring gate, maintains the pressure, and gradually solidifies the aluminum liquid in the closed cavity, and starts the cooling device in time to cool the casting; S3: After maintaining the pressure for a certain period of time, release the pressure at the right time, and keep the cooling device on to cool the casting; after the casting has cooled for a certain period of time, close the cooling device at the right time, and the casting begins to cool naturally in the closed cavity; after the casting has cooled naturally for a certain period of time, separate the upper mold insert and the lower mold insert at the right time, and take out the aluminum casting with a complex inner cavity.

[0031] The casting stages include liquid raising stage, mold filling stage, pressurization stage, pressure holding stage and cooling stage in sequence; In the liquid raising stage, the low-pressure casting machine pressurizes at a relatively high pressurization speed, so that the aluminum liquid passes through the liquid raising pipe of the low-pressure casting machine and quickly rises into the pouring basin, and the pressure reaches a predetermined liquid raising pressure; In the filling stage, the low-pressure casting machine pressurizes at a relatively low speed, so that the self-gating basin rises slowly, gradually enters each independent closed cavity through the gate, and makes the pressure reach a predetermined filling pressure; In the pressurization stage, the low-pressure casting machine pressurizes at an extremely high pressurization speed so that the pressure quickly reaches the predetermined holding pressure; In the pressure holding stage, the pressure holding pressure is maintained, and the aluminum liquid gradually solidifies in the closed cavity, and when the predetermined cooling device opening time is reached, the cooling device is opened; In the cooling stage, when the predetermined pressure holding end time is reached, the pressure is released, and when the predetermined cooling device end time is reached, the cooling device is closed to allow the casting to cool naturally in the closed cavity; When the predetermined mold opening time is reached, the upper mold insert and the lower mold insert are separated to take out the complex inner cavity aluminum casting; In the liquid raising stage, the low-pressure casting machine pressurizes at a relatively high pressurization speed, the temperature drop of the aluminum liquid is relatively small, and the flow of the aluminum liquid is kept stable, which can effectively avoid the entrapment of gas and impurities; in the mold filling stage, the low-pressure casting machine pressurizes at a relatively low pressurization speed, thereby preventing turbulence and the entrapment of gas and impurities; in the pressurization stage, the low-pressure casting machine pressurizes at an extremely high pressurization speed, so that the aluminum liquid solidifies quickly under pressure conditions, thereby forming a dense casting structure.

[0032] Releasing the pressure at the right time and continuously opening the cooling device to cool the casting can achieve sequential solidification of the casting, reduce shrinkage defects, and quickly reduce the casting temperature to a suitable temperature for opening the mold and removing the casting, thereby significantly improving production efficiency.

[0033] The initial pouring temperature of the complex inner cavity aluminum casting is controlled at 690° C. to 720° C.; and / or The casting temperature of the complex inner cavity aluminum casting is controlled at 300° C. to 500° C.; and / or The pressurization speed in the liquid raising stage is 16 mbar / s to 18 mbar / s, and the liquid raising pressure is 140 mbar to 180 mbar; and / or The pressurization speed in the filling stage is 6mbar / s to 8mbar / s, and the filling pressure is 200mbar to 240mbar; and / or The pressurization speed in the pressurization stage is 20 mbar / s to 25 mbar / s, and the holding pressure is 260 mbar to 280 mbar.

[0034] The timing starts from when the low-pressure casting machine starts to pressurize at a lower pressurization speed; Timing the 60th to 70th second is the start time of the cooling device in the pressure holding stage; and / or The 100s to 110s are counted as the end time of the pressure holding in the cooling stage; and / or Timing the time from 110s to 120s is the end time of the cooling device in the cooling stage; and / or The timing from 140s to 160s is the mold opening time.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A low-pressure casting mold for a complex inner cavity aluminum casting, comprising an insert (1), wherein the insert (1) comprises an upper mold insert (2) and a lower mold insert (3), characterized in that: The upper mold insert (2) and the lower mold insert (3) are each provided with a plurality of mutually independent cavities (4). When the upper mold insert (2) and the lower mold insert (3) are molded together, a plurality of independent closed cavities (5) are formed. Each closed cavity (5) is provided with a group of cooling devices (11) and a pouring gate (6). The pouring gates (6) of all the closed cavities (5) are connected to the same pouring basin (7). The pouring gates (6) are located at the bottom of each closed cavity (5) and supported on a pouring basin cover (13) provided above the pouring basin (7). The vertical projections of each pouring gate (6) fall into the upper opening area of ​​the pouring basin (7). The aluminum liquid rises into the pouring basin (7) through the riser (12) of the low-pressure casting machine and enters each independent closed cavity (5) through the pouring gate (6); A sand core (8) is arranged in a closed mold cavity and is used to form an inner cavity in the casting.

2. The low-pressure casting mold for complex inner cavity aluminum castings according to claim 1, characterized in that: The pouring basin (7) is funnel-shaped, with the upper end being connected to each closed cavity (5) through the pouring gate (6), and the lower end being connected to the liquid riser (12), and the upper end opening area of ​​the pouring basin (7) being larger than the lower end opening area.

3. The low-pressure casting mold for complex inner cavity aluminum castings according to claim 1 or 2, characterized in that: The pouring basin (7) is made of ceramic material.

4. The low-pressure casting mold for complex inner cavity aluminum castings according to claim 1, characterized in that: The sand core (8) is made by assembling a plurality of independent sand cores (14).

5. The low-pressure casting mold for complex inner cavity aluminum castings according to claim 1, characterized in that: The cooling device (11) is arranged in a punch (9) provided on the upper die insert (2) and / or the lower die insert (3), and the punch (9) is used to form the inner surface of a complex inner cavity aluminum casting.

6. The low-pressure casting mold for complex inner cavity aluminum castings according to claim 1, characterized in that: The cooling device (11) is a water cooling device, wherein a cooling pipe of the water cooling device is arranged in the upper mold insert (2) and / or the lower mold insert (3), and is connected to an external water source via a water inlet interface (10).

7. A low pressure casting method for complex inner cavity aluminum castings as claimed in claim 1, characterized in that: The steps include: S1: Prefabricate multiple sand cores for occupying the inner space of the closed mold cavity, and set the prefabricated sand cores in each mold cavity of the upper mold insert and / or the lower mold insert. After the sand cores are set, use a sand blowing process to blow away the remaining sand in each independent mold cavity, and close the upper mold insert with the lower mold insert to form multiple closed mold cavities; S2: Set the operating parameters of each casting stage on the controller of the low-pressure casting equipment, and run the low-pressure casting machine. The low-pressure casting machine starts to pressurize, so that the aluminum liquid rises to the pouring basin through the rising pipe of the low-pressure casting machine, and continues to pressurize, so that the aluminum liquid enters each independent closed cavity through the pouring gate, maintains the pressure, and gradually solidifies the aluminum liquid in the closed cavity, and starts the cooling device in time to cool the casting; S3: After maintaining the pressure for a certain period of time, release the pressure at the right time, and keep the cooling device on to cool the casting; after the casting has cooled for a certain period of time, close the cooling device at the right time, and the casting begins to cool naturally in the closed cavity; after the casting has cooled naturally for a certain period of time, separate the upper mold insert and the lower mold insert at the right time, and take out the aluminum casting with a complex inner cavity.

8. The low pressure casting method for complex inner cavity aluminum castings according to claim 7, characterized in that: The casting stages include liquid raising stage, mold filling stage, pressurization stage, pressure holding stage and cooling stage in sequence; In the liquid raising stage, the low-pressure casting machine pressurizes at a relatively high pressurization speed, so that the aluminum liquid passes through the liquid raising pipe of the low-pressure casting machine and quickly rises into the pouring basin, and the pressure reaches a predetermined liquid raising pressure; In the filling stage, the low-pressure casting machine pressurizes at a relatively low speed, so that the self-gating basin rises slowly, gradually enters each independent closed cavity through the gate, and makes the pressure reach a predetermined filling pressure; In the pressurization stage, the low-pressure casting machine pressurizes at an extremely high pressurization speed so that the pressure quickly reaches the predetermined holding pressure; In the pressure holding stage, the pressure holding pressure is maintained, and the aluminum liquid gradually solidifies in the closed cavity, and when the predetermined cooling device opening time is reached, the cooling device is turned on; In the cooling stage, when the predetermined pressure holding end time is reached, the pressure is released, and when the predetermined cooling device end time is reached, the cooling device is closed to allow the casting to cool naturally in the closed cavity; When the predetermined mold opening time is reached, the upper mold insert and the lower mold insert are separated and the complex inner cavity aluminum casting is taken out.

9. The low pressure casting method for complex inner cavity aluminum castings according to claim 7, characterized in that: The initial pouring temperature of the complex inner cavity aluminum casting is controlled at 690° C. to 720° C.; and / or The casting temperature of the complex inner cavity aluminum casting is controlled at 300° C. to 500° C.; and / or The pressurization speed in the liquid raising stage is 16 mbar / s to 18 mbar / s, and the liquid raising pressure is 140 mbar to 180 mbar; and / or The pressurization speed in the filling stage is 6mbar / s to 8mbar / s, and the filling pressure is 200mbar to 240mbar; and / or The pressurization speed in the pressurization stage is 20 mbar / s to 25 mbar / s, and the holding pressure is 260 mbar to 280 mbar.

10. The low pressure casting method according to claim 8 or 9, characterized in that: The timing starts from when the low-pressure casting machine starts to pressurize at a lower pressurization speed; Timing the 60th to 70th second is the start time of the cooling device in the pressure holding stage; and / or The 100s to 110s are counted as the end time of the pressure holding in the cooling stage; and / or Timing the time from 110s to 120s is the end time of the cooling device in the cooling stage; and / or The timing from 140s to 160s is the mold opening time.

Images