Powder injection molding die with deformation pre-compensation function

Abstract

The application discloses a powder injection molding mold with a deformation pre-compensation function and relates to the technical field of powder injection molding molds.The powder injection molding mold comprises a mold carrier, a guide slide rod, a slide plate, a lower molding assembly and an upper molding assembly.The lower molding assembly comprises a plurality of spliced lower mold plates, each of which is connected with an adjusting positioning cover one through an adjusting rod one.The upper molding assembly comprises a plurality of spliced upper mold plates, each of which is connected with an adjusting positioning cover two through an adjusting rod two.The adjusting positioning cover one and the adjusting positioning cover two are connected with an air inlet and air outlet flow control module through an air path with a control valve.The application can independently adjust the position of each mold plate according to the shrinkage of different parts of a part, realize non-uniform pre-compensation of a cavity, adapt to the non-uniform shrinkage of the part, greatly improve the size precision of the part, and simultaneously improve the feeding filling density through a vibration mechanism, and is suitable for high-precision batch production of powder injection molding parts with complex structures.

Description

Technical Field

[0001] This invention relates to the field of powder injection molding die technology, and in particular to a powder injection molding die with deformation pre-compensation function. Background Technology

[0002] Powder injection molding is a near-net-shape forming technology that combines the advantages of powder metallurgy and plastic injection molding. It involves mixing metal / ceramic powder with a binder to form a feedstock, which is then injected into a mold cavity under heating. After cooling, debinding, and sintering, high-precision, dense parts are obtained. It is widely used in the mass production of small parts with complex structures.

[0003] During the powder injection molding process, the parts will shrink in volume during the debinding and sintering stages. Due to differences in wall thickness and structure, the shrinkage rate varies significantly in different parts of the part, which can easily lead to non-uniform deformation and cause the dimensional accuracy of the parts to exceed the tolerance.

[0004] In existing technologies, the shrinkage is usually offset by uniformly enlarging the cavity size. However, this method cannot adapt to the non-uniform shrinkage of different parts of the part, resulting in large dimensional accuracy errors in the finished part. This requires adding multiple shaping processes, which significantly increases production costs and may even lead to batch scrapping.

[0005] In addition, existing powder injection molding dies have the following defects: during the injection process, the material is not densely filled in the cavity, which easily leads to defects such as pores and material shortages; after molding, the parts cool slowly and unevenly, which not only reduces production efficiency but also aggravates the deformation of the parts. Summary of the Invention

[0006] The purpose of this invention is to overcome the problems of the inability of the uniformly enlarged cavity in the prior art to adapt to the non-uniform shrinkage of the parts and the low dimensional accuracy. It provides a powder injection molding die with deformation pre-compensation function, which can adjust the cavity for non-uniform pre-compensation according to the shrinkage rate of different parts of the parts, greatly improve the forming accuracy of the parts, and at the same time improve the feeding filling density and cooling efficiency.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A powder injection molding die with deformation pre-compensation function includes a die platform. Four vertically arranged guide slides are fixedly installed at the top corners of the die platform, and a slide plate is slidably installed between the four guide slides. A die carrier plate is fixedly installed at the center of the top of the die platform. A die mounting cover is fixedly installed on the top of the die carrier plate. A lower molding component is installed inside the die mounting cover. A die carrier plate is fixedly installed at the bottom of the slide plate. A die mounting cover is fixedly installed at the bottom of the die carrier plate. An upper molding component is installed inside the die mounting cover. The upper molding component and the lower molding component are aligned to form an injection cavity.

[0009] The lower forming assembly includes multiple lower templates spliced ​​along the contour of the cavity. Two adjusting rods are fixedly connected to the outer side of each lower template. An adjusting positioning cover is slidably sleeved on the outer side of the adjusting rod. The adjusting positioning cover is located inside the mold mounting cover. A return spring is provided in the inner cavity of the adjusting positioning cover. The two ends of the return spring abut against the bottom of the inner cavity of the adjusting positioning cover and the inner end of the adjusting rod, respectively.

[0010] The upper forming component includes multiple upper templates spliced ​​along the contour of the cavity. An adjusting rod is fixedly connected to the outer side of each upper template. An adjusting positioning cover is slidably sleeved on the outer side of the adjusting rod. The adjusting positioning cover is located inside the mold mounting cover. A return spring is provided in the inner cavity of the adjusting positioning cover. The two ends of the return spring abut against the bottom of the inner cavity of the adjusting positioning cover and the inner end of the adjusting rod, respectively.

[0011] A lower mold inlet / outlet airflow control module is fixedly installed on one side of the mold platform. The output end of the lower mold inlet / outlet airflow control module is connected to a main flow pipe. The main flow pipe is connected to multiple branch pipes. Each branch pipe is connected to the inner cavity of a corresponding adjustment and positioning cover through a guide pipe with a control valve.

[0012] The top of the slide plate is fixedly installed with an upper mold airflow control module. The output end of the upper mold airflow control module is connected to a conveying pipe. The conveying pipe is connected to multiple guide pipes II with control valves. Each guide pipe II is connected to the inner cavity of a corresponding adjustment and positioning cover II.

[0013] Furthermore, a movable intermediate template is provided between the top of the mold mounting cover and the lower template. A cooling channel is provided inside the movable intermediate template. The two ends of the cooling channel are an air inlet groove and an air outlet groove, respectively. An external airflow pipe is connected to the outer end of the air inlet groove. The external airflow pipe is used to connect to an external cooling air source.

[0014] Furthermore, each of the four guide slide rods has a vertical slide groove on its inner side. Multiple vibrating plates evenly distributed vertically are fixedly installed in the vertical slide groove. A buffer spring is fixed at the top of the vertical slide groove, and a movable slide rod is fixed at the lower end of the buffer spring. The movable slide rod is slidably installed in the vertical slide groove. An impact rod is fixed on the side wall of the movable slide rod, and the impact rod is located directly above the vibrating plate.

[0015] Furthermore, the lower ends of all four movable slide rods pass through the mold platform, and the lower ends of two movable slide rods on the same side are fixedly connected by a connecting support plate. A movable base plate is fixedly installed between the two connecting support plates, and a transmission groove is provided at the bottom of the movable base plate.

[0016] Furthermore, a servo motor is fixedly installed on the inner side of the mold platform, and a rotating plate is fixed on the output shaft of the servo motor. The rotating plate is an elliptical plate and is rotatably installed in the transmission groove at the bottom of the movable base plate.

[0017] Furthermore, a guide cover is fixed to one end of the adjusting positioning cover away from the lower template, and a movable cover is rotatably sleeved on the outer side of the guide cover. The end of the guide pipe is fixed and connected to the side wall of the movable cover.

[0018] Furthermore, a feed pipe is fixed through the center of the slide plate, the mold carrier plate II, and the mold mounting cover II, and the lower end of the feed pipe extends to the center of the cavity formed by the upper template.

[0019] Furthermore, each of the lower and upper templates is fixedly equipped with a displacement sensor, which is connected to the control valve signal on the corresponding guide pipe one and guide pipe two, and is used to adjust the opening of the control valve in a closed loop according to the template displacement data.

[0020] Furthermore, high-temperature resistant seals are provided between two adjacent lower templates and between two adjacent upper templates. The high-temperature resistant seals are polytetrafluoroethylene (PTFE) sealing strips.

[0021] Furthermore, the cooling channels inside the active intermediate template are serpentine channels, which are evenly distributed along the contour of the cavity.

[0022] This invention provides a powder injection molding die with deformation pre-compensation function, which has the following beneficial effects:

[0023] In use, this invention divides the upper and lower templates into different areas. The positions of multiple upper and lower templates are adjusted according to the thickness of different areas of the part. The airflow generated by the air pump is combined with the control valve to control the airflow. The airflow pushes the adjusting rod one or adjusting rod two, which in turn drives the upper and lower templates to make uneven position adjustments. This can perfectly adapt to the shrinkage degree of different parts after the part is formed, improve the accuracy of the part dimensions, and reduce the product defects caused by large deviations in the degree of dimensional shrinkage.

[0024] After molding is completed, external cold air is introduced through an external airflow pipe. The cold air enters the air inlet groove to cool the molded parts. The used airflow is then discharged through the air outlet groove. The airflow can quickly and evenly reduce the temperature of the parts, shorten the cooling time, improve the demolding efficiency, and improve the overall production efficiency.

[0025] During the heating process, displacement sensors installed on the upper and lower templates can adjust the position of the adjusting rod one or adjusting rod two according to the shrinkage of the parts, thereby precisely adjusting the position of the upper and lower templates, further improving the precision of parts production and ensuring the stability and consistency of product quality. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0027] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0028] In the attached diagram:

[0029] Figure 1 A schematic diagram of the overall structure of the present invention is shown;

[0030] Figure 2 A cross-sectional view of the mold platform structure of the present invention is shown;

[0031] Figure 3 A three-dimensional structural diagram of the rotating plate of the present invention is shown;

[0032] Figure 4 A three-dimensional structural diagram of the diversion tube of the present invention is shown;

[0033] Figure 5 A cross-sectional view of the mold mounting cover of the present invention is shown;

[0034] Figure 6 A cross-sectional view of the adjusting positioning cover of the present invention is shown;

[0035] Figure 7 A schematic cross-sectional view of the slide plate structure of the present invention is shown;

[0036] Figure 8 A schematic diagram of the two-dimensional structure of the guide tube of the present invention is shown;

[0037] Figure 9 A schematic cross-sectional view of the adjusting positioning cover of the present invention is shown.

[0038] List of reference numerals

[0039] 1. Mold platform; 101. Guide slide bar; 102. Vibration plate; 103. Movable slide bar; 104. Impact bar; 105. Connecting support plate; 106. Movable base plate; 107. Rotating plate;

[0040] 2. Mold carrier plate 1; 201. Mold mounting cover 1; 202. Lower template; 203. Adjusting rod 1; 204. Adjusting and positioning cover 1; 205. Guide cover; 206. Movable cover; 207. Main flow pipe; 208. Diverter pipe; 209. Guide pipe 1; 2010. Movable intermediate template; 2011. Air inlet slot; 2012. Air outlet slot; 2013. External airflow pipe;

[0041] 3. Slide plate; 301. Mold carrier plate II; 302. Mold mounting cover II; 303. Upper template; 304. Feed pipe; 305. Adjusting rod II; 306. Adjusting and positioning cover II; 307. Conveying pipe; 308. Guide pipe II. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. Based on the described 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.

[0043] Please refer to Figure 1-9 Example 1: This example provides a powder injection molding die with deformation pre-compensation function, including a die platform 1, which is a rectangular steel structure platform. A vertically arranged guide slide rod 101 is fixedly installed at each of the four corners of the top of the die platform 1. A slide plate 3 is slidably installed between the four guide slide rods 101. The slide plate 3 is driven and connected to the mold closing cylinder of the injection machine, and can slide vertically along the guide slide rods 101 to realize mold closing and mold opening.

[0044] A mold carrier plate 1 is fixedly installed at the center of the top of the mold carrier 1. A mold mounting cover 201 is fixed to the top of the mold carrier plate 1 by bolts. The mold mounting cover 201 is a rectangular cover with an opening at the top. A lower molding component is installed inside the mold mounting cover 201. A mold carrier plate 201 is fixed to the bottom of the slide plate 3 by bolts. A mold mounting cover 202 is fixed to the bottom of the mold carrier plate 201. The mold mounting cover 202 is a rectangular cover with an opening at the bottom. An upper molding component is installed inside the mold mounting cover 202. The upper molding component and the lower molding component are aligned to form an injection cavity. A feed pipe 304 is fixed through the center of the slide plate 3, the mold carrier plate 201, and the mold mounting cover 202. The upper end of the feed pipe 304 is connected to the nozzle of the injection machine. The lower end of the feed pipe 304 extends to the center of the cavity formed by the upper mold plate 303 for injecting material into the cavity.

[0045] The lower molding assembly includes multiple lower templates 202 spliced ​​along the contour of the cavity. In this embodiment, the number of lower templates 202 is set according to the contour and number of partitions of the part cavity. Each lower template 202 corresponds to a characteristic area of ​​the part. A high-temperature resistant seal is provided between two adjacent lower templates 202. The high-temperature resistant seal is a polytetrafluoroethylene sealing strip, which can prevent material leakage from the template gaps during injection and does not affect the horizontal adjustment displacement of the template. Two adjusting rods 203 are fixedly connected to the outside of each lower template 202. An adjusting positioning cover 204 is slidably sleeved on the outside of the adjusting rods 203. The adjusting positioning cover 204 is located inside the mold mounting cover 201. A return spring is provided in the inner cavity of the adjusting positioning cover 204. The two ends of the return spring abut against the bottom of the inner cavity of the adjusting positioning cover 204 and the inner end of the adjusting rod 203, respectively.

[0046] A lower mold inlet / outlet airflow control module is fixedly installed on one side of the mold platform 1. The lower mold inlet / outlet airflow control module uses a precision pressure-stabilized air pump. The output end of the lower mold inlet / outlet airflow control module is connected to a main flow pipe 207. The main flow pipe 207 is connected to multiple branch pipes 208. The number of branch pipes 208 is the same as the number of lower mold plates 202. Each branch pipe 208 is connected to the inner cavity of a corresponding adjustment positioning cover 204 through a guide pipe 209 with a control valve. The control valve is a precision electromagnetic proportional valve, which can accurately adjust the air pressure and flow rate of the air path. A guide cover 205 is fixed to the end of the adjustment positioning cover 204 away from the lower mold plate 202. A movable cover 206 is rotatably sleeved on the outer side of the guide cover 205. The end of the guide pipe 209 is fixed and connected to the side wall of the movable cover 206. The movable cover 206 can accommodate the slight angle deflection of the adjustment rod 203 to avoid stress bending of the air path joint.

[0047] The upper forming assembly includes multiple upper templates 303 spliced ​​along the contour of the cavity. The upper templates 303 and lower templates 202 are arranged in a one-to-one correspondence. A polytetrafluoroethylene sealing strip is also provided between two adjacent upper templates 303. An adjusting rod 305 is fixedly connected to the outside of each upper template 303. An adjusting positioning cover 306 is slidably sleeved on the outside of the adjusting rod 305. The adjusting positioning cover 306 is located inside the mold mounting cover 302. A return spring is provided in the inner cavity of the adjusting positioning cover 306. The two ends of the return spring abut against the bottom of the inner cavity of the adjusting positioning cover 306 and the inner end of the adjusting rod 305, respectively.

[0048] The top of the slide plate 3 is fixedly equipped with an upper mold airflow control module. The upper mold airflow control module also adopts a precision pressure-stabilized air pump. The output end of the upper mold airflow control module is connected to a delivery pipe 307. The delivery pipe 307 is connected to multiple guide pipes 308 with control valves. The number of guide pipes 308 is the same as the number of upper templates 303. Each guide pipe 308 is connected to the inner cavity of a corresponding adjustment and positioning cover 306. The control valve on the guide pipe 308 is also a precision electromagnetic proportional valve.

[0049] Displacement sensors are fixedly installed on each lower template 202 and upper template 303. The displacement sensors are high-precision laser displacement sensors. The displacement sensors are connected to the control valve signals on the corresponding guide pipe 1 209 and guide pipe 2 308. They can collect the actual displacement data of the template in real time and feed it back to the controller to adjust the opening of the control valve in a closed loop, so as to achieve precise control of the pre-compensation amount.

[0050] A movable intermediate template 2010 is provided between the top of the mold mounting cover 201 and the lower template 202. The movable intermediate template 2010 has a cooling channel inside. The cooling channel is a serpentine channel, which is evenly distributed along the contour of the cavity. The two ends of the cooling channel are an air inlet groove 2011 and an air outlet groove 2012. The outer end of the air inlet groove 2011 is connected to an external airflow pipe 2013. The external airflow pipe 2013 is used to connect to an external cooling air source, such as a refrigerated dryer or a liquid nitrogen cooling system. The outer end of the air outlet groove 2012 is connected to an exhaust pipe for discharging the airflow after heat exchange.

[0051] The working principle of this embodiment:

[0052] Before using the mold, the sintering shrinkage rate of different parts of the part is simulated and calculated based on the three-dimensional model of the part to be formed. The pre-compensation amount of different positions of the cavity is determined based on the shrinkage rate data, and then the target adjustment displacement of each lower template 202 and upper template 303 is determined.

[0053] During adjustment, the spring force of the return spring pushes the adjusting rod 203 inward, causing the lower template 202 to move inward, thus pre-enlarging the cavity size. Compressed air is supplied through the lower mold airflow control module. Based on the pre-compensation amount of each area, the opening of the control valve on the corresponding guide pipe 209 is adjusted, allowing compressed air to enter the inner cavity of the corresponding adjusting positioning cover 204. The air pressure pushes the adjusting rod 203 outward against the spring force of the return spring, precisely controlling the displacement of the corresponding lower template 202, achieving non-uniform pre-compensation at different positions of the cavity. Similarly, the displacement of each upper template 303 is precisely adjusted through the upper mold airflow control module and the control valve on the guide pipe 308, completing the pre-compensation adjustment of the upper mold cavity.

[0054] After the mold is closed, the injection machine injects molten material into the cavity through the feed pipe 304. After injection, the pressure is held and the part is shaped. After sizing, the cooling airflow is introduced into the cooling channel through the external airflow pipe 2013 to cool the part quickly and evenly, shortening the cooling time. After cooling, the mold is opened and the part is ejected, completing one injection molding.

[0055] During the injection and holding pressure processes, the displacement sensor collects the displacement data of the template in real time. If the template displacement deviates due to changes in mold pressure or temperature, the controller automatically adjusts the opening of the corresponding control valve to correct the template position in real time, ensuring the accuracy of the pre-compensation amount and ensuring the dimensional accuracy of the parts.

[0056] Example 2: Based on Example 1, in this example, vertical grooves are provided on the inner sides of the four guide slide rods 101. Multiple vibrating plates 102 evenly distributed vertically are fixedly installed in the vertical grooves. A buffer spring is fixed at the top of the vertical groove, and a movable slide rod 103 is fixed at the lower end of the buffer spring. The movable slide rod 103 is slidably installed in the vertical groove. An impact rod 104 is fixed on the side wall of the movable slide rod 103, and the impact rod 104 is located directly above the vibrating plate 102.

[0057] The lower ends of the four movable slide rods 103 all penetrate the mold platform 1, and the lower ends of two movable slide rods 103 on the same side are fixedly connected by a connecting support plate 105. A movable base plate 106 is fixedly installed between the two connecting support plates 105, and a transmission groove is provided at the bottom of the movable base plate 106. A servo motor is fixedly installed on the inner side of the mold platform 1, and a rotating plate 107 is fixed on the output shaft of the servo motor. The rotating plate 107 is an elliptical plate and is rotatably installed in the transmission groove at the bottom of the movable base plate 106.

[0058] The working principle of this embodiment:

[0059] During the injection feeding process, the servo motor drives the rotating plate 107 to rotate. As the elliptical rotating plate 107 rotates, its long axis pushes the movable base plate 106 upward, which in turn drives the four movable slide rods 103 to move upward synchronously through the connecting support plate 105, compressing the buffer spring. When the short axis of the rotating plate 107 rotates downward, the elastic force of the buffer spring pushes the movable slide rods 103 downward, causing the impact rod 104 to impact the vibration plate 102 downward, generating high-frequency micro-amplitude vibration. The vibration is transmitted to the cavity through the guide slide rod 101, the mold platform 1, and the slide plate 3, accelerating the flow of the feed material in the cavity, allowing the feed material to fully fill the fine structure of the cavity, while making the powder particles more compact, reducing the porosity defects inside the part, and improving the density and molding quality of the part.

[0060] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A powder injection molding die with deformation pre-compensation function, comprising a die platform (1), wherein four vertically arranged guide slides (101) are fixedly installed at the corners of the top of the die platform (1), and a slide plate (3) is slidably installed between the four guide slides (101); a die carrier plate (2) is fixedly installed at the center of the top of the die platform (1), a die mounting cover (201) is fixedly installed on the top of the die carrier plate (2), and a lower molding component is installed on the inner side of the die mounting cover (201); a die carrier plate (301) is fixedly installed at the bottom of the slide plate (3), a die mounting cover (302) is fixedly installed at the bottom of the die carrier plate (301), and an upper molding component is installed on the inner side of the die mounting cover (302), wherein the upper molding component and the lower molding component are aligned to form an injection cavity; characterized in that: The lower forming assembly includes multiple lower templates (202) spliced ​​along the contour of the cavity. Two adjusting rods (203) are fixedly connected to the outer side of each lower template (202). An adjusting positioning cover (204) is slidably sleeved on the outer side of the adjusting rod (203). The adjusting positioning cover (204) is located inside the mold mounting cover (201). A return spring is provided in the inner cavity of the adjusting positioning cover (204). The two ends of the return spring abut against the bottom of the inner cavity of the adjusting positioning cover (204) and the inner end of the adjusting rod (203), respectively. The upper forming component includes multiple upper templates (303) spliced ​​along the contour of the cavity. Each upper template (303) is fixedly connected to an adjusting rod (305) on its outer side. An adjusting positioning cover (306) is slidably sleeved on the outer side of the adjusting rod (305). The adjusting positioning cover (306) is located inside the mold mounting cover (302). A return spring is provided in the inner cavity of the adjusting positioning cover (306). The two ends of the return spring abut against the bottom of the inner cavity of the adjusting positioning cover (306) and the inner end of the adjusting rod (305), respectively. A lower mold inlet / outlet airflow control module is fixedly installed on one side of the mold platform (1). The output end of the lower mold inlet / outlet airflow control module is connected to a main flow pipe (207). The main flow pipe (207) is connected to multiple branch pipes (208). Each branch pipe (208) is connected to the inner cavity of a corresponding adjustment and positioning cover (204) through the inner cavity of a guide pipe (209) with a control valve. The top of the slide plate (3) is fixedly installed with an upper mold airflow control module. The output end of the upper mold airflow control module is connected to a conveying pipe (307). The conveying pipe (307) is connected to multiple guide pipes (308) with control valves. Each guide pipe (308) is connected to the inner cavity of a corresponding adjustment and positioning cover (306).

2. The powder injection molding die with deformation pre-compensation function according to claim 1, characterized in that, A movable intermediate template (2010) is provided between the top of the mold mounting cover (201) and the lower template (202). A cooling channel is provided inside the movable intermediate template (2010). The two ends of the cooling channel are an air inlet groove (2011) and an air outlet groove (2012). The outer end of the air inlet groove (2011) is connected to an external airflow pipe (2013). The external airflow pipe (2013) is used to connect to an external cooling air source.

3. The powder injection molding die with deformation pre-compensation function according to claim 1, characterized in that, The inner sides of the four guide slide rods (101) are provided with vertical slide grooves. Multiple vibrating plates (102) evenly distributed vertically are fixedly installed in the vertical slide grooves. A buffer spring is fixed at the top of the vertical slide groove, and a movable slide rod (103) is fixed at the lower end of the buffer spring. The movable slide rod (103) is slidably installed in the vertical slide groove. An impact rod (104) is fixed on the side wall of the movable slide rod (103). The impact rod (104) is located directly above the vibrating plate (102).

4. The powder injection molding die with deformation pre-compensation function according to claim 3, characterized in that, The lower ends of the four movable slide rods (103) all pass through the mold platform (1), and the lower ends of the two movable slide rods (103) on the same side are fixedly connected by a connecting support plate (105). A movable base plate (106) is fixedly installed between the two connecting support plates (105), and a transmission groove is provided at the bottom of the movable base plate (106).

5. The powder injection molding die with deformation pre-compensation function according to claim 4, characterized in that, A servo motor is fixedly installed on the inner side of the mold platform (1), and a rotating plate (107) is fixed on the output shaft of the servo motor. The rotating plate (107) is an elliptical plate and is rotatably installed in the transmission groove at the bottom of the movable base plate (106).

6. The powder injection molding die with deformation pre-compensation function according to claim 1, characterized in that, The end of the adjustment positioning cover (204) away from the lower template (202) is fixed with a guide cover (205), and a movable cover (206) is rotatably sleeved on the outside of the guide cover (205). The end of the guide pipe (209) is fixed and connected to the side wall of the movable cover (206).

7. The powder injection molding die with deformation pre-compensation function according to claim 1, characterized in that, The center of the slide plate (3), the mold carrier plate 2 (301) and the mold mounting cover 2 (302) is fixed with a feed pipe (304), and the lower end of the feed pipe (304) extends to the center of the cavity formed by the upper template (303).

8. The powder injection molding die with deformation pre-compensation function according to claim 1, characterized in that, Each of the lower template (202) and upper template (303) is fixedly equipped with a displacement sensor. The displacement sensor is connected to the control valve signal on the corresponding guide pipe one (209) and guide pipe two (308) to adjust the opening degree of the control valve in a closed loop according to the template displacement data.

9. The powder injection molding die with deformation pre-compensation function according to claim 1, characterized in that, High-temperature resistant seals are provided between two adjacent lower templates (202) and between two adjacent upper templates (303), and the high-temperature resistant seals are polytetrafluoroethylene sealing strips.

10. The powder injection molding die with deformation pre-compensation function according to claim 2, characterized in that, The cooling channels inside the active intermediate template (2010) are serpentine channels, which are evenly distributed along the contour of the cavity.

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