Automobile interior part injection mold with cooling structure

Abstract

The application relates to the technical field of injection molds, and particularly discloses an automobile interior part injection mold with a cooling structure, which comprises an injection machine frame and an injection unit; the injection unit is arranged on the injection machine frame; the injection unit comprises a fixed mold plate, and further comprises a demolding unit and a receiving unit; the demolding unit comprises a fixed base and a movable mold plate; the fixed base is fixedly connected to the injection machine frame; a guide rod and a cylinder one are arranged on the fixed base; the output end of the cylinder one is connected to the movable mold plate; a pulse air cooling type global cooling system is constructed; cooling air is directly output to the product forming surface through the distributed air holes on the side wall of a mold groove and the surface of a convex mold; the bottleneck of the shape following property limited by the traditional water cooling is broken; the uneven cooling of a special-shaped cavity can be realized; the product temperature field distribution is effectively balanced; and the internal stress and warping deformation during the molding are inhibited.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to an injection mold for automotive interior parts with a cooling structure. Background Technology

[0002] As the automotive industry accelerates its evolution towards electrification, intelligence, and high-end products, automotive interior parts, as the core carrier of human-vehicle interaction, are developing towards thinner walls, more complex shapes, and higher surface quality. Among these, the injection molding cooling process, as a core component of the molding cycle, directly determines the internal stress level, molding quality, and mass production cycle of the product through its cooling uniformity and efficiency. This is the core area of ​​focus for high-end interior part mold technology.

[0003] In existing technologies, injection molds generally use circulating water channels for cooling. Cooling channels are machined inside the mold plate and coolant is introduced to remove heat from the cavity. However, for complex automotive interior parts molds, the cooling channels cannot completely conform to the curved contours of irregular cavities, easily creating cooling blind spots. At the same time, the complex water channels are difficult to machine and have high manufacturing costs. Long-term use also poses maintenance risks such as water leakage and corrosion. In the demolding process, conventional molds mostly use ejector plates to drive ejector pins to eject the plastic parts. For automotive interior parts with high surface requirements, ejector pins are prone to leaving white marks and marks on the surface of the plastic parts, and may even cause deformation of thin-walled parts during ejection, making it difficult to meet the appearance quality requirements of the interior parts. Therefore, there is an urgent need for an injection mold for automotive interior parts that can balance cooling efficiency and uniformity and achieve demolding. Summary of the Invention

[0004] The purpose of this invention is to provide an injection mold for automotive interior parts with a cooling structure.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An injection mold for automotive interior parts with a cooling structure includes an injection molding frame and an injection molding unit; the injection molding unit is mounted on the injection molding frame and includes a fixed mold plate, a demolding unit, and a receiving unit.

[0007] The demolding unit includes a fixed base and a moving template; the fixed base is fixedly connected to the injection molding machine frame; the fixed base is provided with a guide rod and a cylinder; the output end of the cylinder is connected to the moving template; the guide rod passes through the moving template; the moving template has a mold groove and a punch on the side facing the fixed template; the moving template has a first chamber and a second chamber inside; both the first and second chambers are provided with air inlets; the air inlet in the second chamber is connected to the air hole on the side of the mold groove; the air inlet in the first chamber is connected to the punch; the punch has multiple sets of air holes.

[0008] A driving unit is provided at the bottom of the moving template; the driving unit includes an inflatable piston; the inflatable piston is fixedly connected to the bottom of the moving template; the outlet end of the inflatable piston is connected to the inlet pipe for conveying cooling airflow to the mold groove and the punch.

[0009] Furthermore, the drive unit also includes a rotating column, a turntable, an internal gear disk, a planetary gear, a connecting plate, and a one-way gear; a support plate is fixedly connected to the side wall of the inflation piston; a fixing plate is fixedly connected to the side wall of the support plate; the rotating column is rotatably connected to the fixing plate; the one-way gear is rotatably mounted on the rotating column; the end of the rotating column away from the fixing plate is fixedly connected to the turntable; the planetary gear is rotatably connected to the turntable; the internal gear disk is fixedly connected to the inflation piston; the planetary gear is located inside the internal gear disk and meshes with the internal teeth of the internal gear disk; the end of the planetary gear away from the turntable is rotatably connected to the connecting plate; a piston rod is slidably connected inside the inflation piston; the connecting plate is hinged to the piston rod.

[0010] Furthermore, the one-way gear consists of a double-toothed gear, a wedge plate, a telescopic spring, a gear seat, and a one-way wheel; the gear seat is fixedly connected to the rotating column; the one-way wheel is fixedly connected to the outside of the gear seat; the double-toothed gear is rotatably sleeved on the outside of the one-way wheel and rotatably connected to the gear seat; multiple sets of grooves are formed on the outer circumference of the one-way wheel; the telescopic spring and the wedge plate are disposed in the grooves; the wedge plate is rotatably connected to the grooves; both ends of the telescopic spring are fixedly connected to the grooves and the wedge plate, respectively; ratchet teeth are provided on the inner wall of the double-toothed gear.

[0011] Furthermore, the inflation piston is provided with an inlet one-way valve and a one-way outlet valve; the piston rod is slidably and sealed inside the inflation piston; the one-way outlet valve is provided with an outlet pipe; the outlet pipe is connected to the inlet pipe; and the inlet one-way valve is located at the end of the inflation piston.

[0012] Furthermore, the receiving unit is located inside the injection molding machine frame; the receiving unit includes a receiving chamber, a chamber door, a top bar, a telescopic column, a cylinder, and a top plate; the receiving chamber is located below the demolding unit.

[0013] Furthermore, the door is slidably disposed inside the receiving chamber; the top bar is fixedly connected to the door; the top plate is fixedly connected to the side wall of the injection molding machine frame and abuts against the top bar; the telescopic column and cylinder two are disposed at the bottom of the receiving chamber.

[0014] Furthermore, a rack is fixedly connected to the bottom of the fixed base; the rack is movably engaged with a one-way gear.

[0015] Furthermore, the fixed template is fixed to the injection molding machine frame; the moving template is driven by a cylinder to close with the fixed template.

[0016] Furthermore, the pores are formed on the non-surface molded surface of the injection molded part, and the pore diameter is smaller than the critical size for the injection molten material to flow in.

[0017] Furthermore, the ratio of the number of teeth on the internal gear disk to the number of teeth on the planetary gear is 2:1.

[0018] The beneficial effects of this invention are:

[0019] (1) This invention constructs a pulse air-cooled full-area cooling system, which outputs cooling airflow directly to the product forming surface through distributed air holes on the side wall of the mold groove and the surface of the punch. This breaks through the bottleneck of conformity of traditional water cooling due to processing technology limitations, and can achieve uniform cooling of irregular cavity without blind spots, effectively balance the temperature field distribution of the product, and suppress the internal stress and warping deformation during molding.

[0020] (2) By integrating an inflatable piston and planetary gear transmission mechanism at the bottom of the moving template, the linear displacement of the mold opening motion is converted into the reciprocating motion of the piston rod, thereby realizing the in-situ preparation and pulse output of compressed gas. This design eliminates the reliance on external air pumps or centralized air supply systems in traditional schemes. It can drive the generation of cooling medium by using only the inherent mold opening action of the mold, which significantly reduces the complexity of equipment and energy consumption. At the same time, it realizes the time coupling of the cooling process and the mold opening process, and improves the collaborative efficiency of the process chain.

[0021] (3) The present invention adopts a non-contact pneumatic demolding mechanism. The cooling airflow acts evenly on the non-appearance surface of the product to achieve smooth demolding. There are no rigid ejection elements in contact with the appearance surface of the product throughout the process, which eliminates appearance defects such as whitening, ejection marks and ejection deformation from the root. It perfectly meets the A-level surface quality requirements of high-end automotive interior parts. Moreover, the entire process of product receiving and automatic material discharge is fully automated through mechanical linkage. The receiving chamber is automatically lifted before demolding and closes by gravity. After receiving the material, it descends accordingly. The chamber door is opened adaptively through the top bar-top plate abutment structure to complete the orderly export of the product. The entire process does not require the addition of independent drive or sensor control, and the structure is simple and reliable.

[0022] (4) The present invention integrates four major functions: cooling medium generation, pulse airflow injection, non-destructive pneumatic demolding and automatic material receiving and discharging. The functional modules cooperate in an orderly manner through pure mechanical linkage, without the need for complex electrical control timing and peripheral auxiliary equipment. Compared with the traditional solution where the cooling, demolding and material receiving systems are separate and occupy the same space, the present invention significantly simplifies the mold structure and reduces manufacturing costs and maintenance difficulty. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the overall structure of the injection molding machine frame in this invention;

[0025] Figure 2This is a schematic diagram of the overall structure of the fixed base in this invention;

[0026] Figure 3 This is a cross-sectional view of the overall structure of the rack in this invention;

[0027] Figure 4 This is a schematic diagram of the overall structure of the demolding unit in this invention;

[0028] Figure 5 This is a schematic diagram of the overall structure of the air-filled piston in this invention;

[0029] Figure 6 This is a schematic diagram of the overall structure of the one-way gear in this invention;

[0030] Figure 7 yes Figure 6 Enlarged view of point A in the middle;

[0031] Figure 8 This is an exploded structural diagram of the one-way gear in this invention;

[0032] Figure 9 This is an exploded structural diagram of the driving unit in this invention;

[0033] Figure 10 This is a schematic diagram of the overall structure of the internal gear disk in this invention;

[0034] Figure 11 This is a schematic diagram of the overall structure of the moving template in this invention;

[0035] Figure 12 This is a cross-sectional view of the overall structure of the moving template in this invention;

[0036] Figure 13 This is a schematic diagram of the overall structure of chamber two in this invention;

[0037] Figure 14 This is a schematic diagram of the overall structure of chamber one in this invention;

[0038] Figure 15 This is a schematic diagram of the overall structure of the receiving compartment in this invention.

[0039] Figure Descriptions: 1. Injection molding machine frame; 2. Injection molding unit; 21. Fixed mold platen; 3. Demolding unit; 31. Fixed base; 311. Cylinder 1; 312. Guide rod; 313. Rack; 32. Moving mold platen; 321. Mold groove; 3211. Punch; 322. Cavity 1; 324. Cavity 2; 33. Inflating piston; 331. One-way vent valve; 332. Vent pipe; 333. Piston rod; 34. Internal gear plate; 35. Fixed plate; 351. Rotating column; 3 52. Turntable; 353. One-way gear; 3531. Gear seat; 3532. One-way wheel; 3533. Groove; 3534. Wedge plate; 3535. Telescopic spring; 3536. Double toothed gear; 354. Planetary gear; 355. Connecting plate; 36. Support plate; 37. Air inlet pipe; 38. Air inlet one-way valve; 4. Receiving unit; 41. Receiving chamber; 42. Chamber door; 421. Top bar; 43. Telescopic column; 44. Cylinder II; 45. Top plate. Detailed Implementation

[0040] 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.

[0041] Please see Figures 1-15 As shown, this application provides an injection mold for automotive interior parts with a cooling structure, including an injection molding frame 1 and an injection molding unit 2; the injection molding unit 2 is disposed on the injection molding frame 1, and the injection molding unit 2 includes a fixed template 21, as well as a demolding unit 3 and a receiving unit 4;

[0042] The demolding unit 3 includes a fixed base 31 and a moving template 32. The fixed base 31 is fixedly connected to the injection molding machine frame 1. The fixed base 31 is provided with a guide rod 312 and a cylinder 311. The output end of the cylinder 311 is connected to the moving template 32. The guide rod 312 passes through the moving template 32. The moving template 32 is provided with a mold groove 321 and a punch 3211 on the side facing the fixed template 21. The moving template 32 has a first chamber 322 and a second chamber 324. Both the first chamber 322 and the second chamber 324 are provided with air inlet pipes 37. The air inlet pipe 37 in the second chamber 324 is connected to the air hole on the side of the mold groove 321. The air inlet pipe 37 in the first chamber 322 is connected to the punch 3211. The punch 3211 has multiple sets of air holes.

[0043] The bottom of the moving template 32 is provided with a driving unit; the driving unit includes an inflation piston 33; the inflation piston 33 is fixedly connected to the bottom of the moving template 32; the air outlet of the inflation piston 33 is connected to the air inlet pipe 37, and is used to deliver cooling airflow to the mold groove 321 and the punch 3211.

[0044] The drive unit further includes a rotating column 351, a turntable 352, an internal gear disk 34, a planetary gear 354, a connecting plate 355, and a one-way gear 353; a support plate 36 is fixedly connected to the side wall of the inflation piston 33; a fixing plate 35 is fixedly connected to the side wall of the support plate 36; the rotating column 351 is rotatably connected to the fixing plate 35; the one-way gear 353 is rotatably mounted on the rotating column 351; one end of the rotating column 351 away from the fixing plate 35 is fixedly connected to the turntable 352; the planetary gear 354 is rotatably connected to the turntable 352; the internal gear disk 34 is fixedly connected to the inflation piston 33; the planetary gear 354 is located inside the internal gear disk 34 and meshes with the internal teeth of the internal gear disk 34; one end of the planetary gear 354 away from the turntable 352 is rotatably connected to the connecting plate 355; a piston rod 333 is slidably connected inside the inflation piston 33; the connecting plate 355 is hinged to the piston rod 333.

[0045] The one-way gear 353 is composed of a double-toothed gear 3536, a wedge plate 3534, a telescopic spring 3535, a gear seat 3531, and a one-way wheel 3532. The gear seat 3531 is fixedly connected to the rotating column 351. The one-way wheel 3532 is fixedly connected to the outside of the gear seat 3531. The double-toothed gear 3536 is rotatably sleeved on the outside of the one-way wheel 3532 and rotatably connected to the gear seat 3531. Multiple sets of grooves 3533 are formed on the outer periphery of the one-way wheel 3532. The telescopic spring 3535 and the wedge plate 3534 are disposed in the grooves 3533. The wedge plate 3534 is rotatably connected to the grooves 3533. Both ends of the telescopic spring 3535 are fixedly connected to the grooves 3533 and the wedge plate 3534, respectively. The inner wall of the double-toothed gear 3536 is provided with ratchet teeth.

[0046] The inflation piston 33 is provided with an inlet one-way valve 38 and a one-way outlet valve 331; the piston rod 333 is slidably and sealed inside the inflation piston 33; the one-way outlet valve 331 is provided with an outlet pipe 332; the outlet pipe 332 is connected to the inlet pipe 37; the inlet one-way valve 38 is located at the end of the inflation piston 33.

[0047] The receiving unit 4 is installed inside the injection molding machine frame 1; the receiving unit 4 includes a receiving chamber 41, a chamber door 42, a top bar 421, a telescopic column 43, a cylinder 44, and a top plate 45; the receiving chamber 41 is located below the demolding unit 3;

[0048] The door 42 is slidably disposed inside the receiving chamber 41; the top bar 421 is fixedly connected to the door 42; the top plate 45 is fixedly connected to the side wall of the injection molding machine frame 1 and abuts against the top bar 421; the telescopic column 43 and the second cylinder 44 are disposed at the bottom of the receiving chamber 41.

[0049] A rack 313 is fixedly connected to the bottom of the fixed base 31; the rack 313 is movably engaged with the one-way gear 353;

[0050] The fixed template 21 is fixedly connected to the injection molding machine frame 1; the moving template 32 is driven by cylinder 311 to close with the fixed template 21.

[0051] The pores are formed on the non-surface molded surface of the injection molded part, and the pore diameter is smaller than the critical size for the injection molten material to flow in.

[0052] The ratio of the number of teeth on the internal gear disk 34 to the number of teeth on the planetary gear 354 is 2:1.

[0053] Injection unit 2 is fixedly installed on one side of injection molding machine frame 1. Injection unit 2 includes fixed platen 21 with injection runner for injecting molten plastic into the cavity. Demolding unit 3 includes fixed base 31 and moving platen 32. Fixed base 31 is fixedly connected to injection molding machine frame 1. Fixed base 31 is provided with guide rod 312 and cylinder 311. Cylinder 311 is used to drive moving platen 32 to move, and guide rod 312 is used to limit the movement path of moving platen 32 to ensure mold closing accuracy.

[0054] The moving template 32 has a mold groove 321 on the side facing the fixed template 21. The mold groove 321 has a punch 3211 inside. The mold groove 321 and the punch 3211 together form the moving mold part of the injection cavity. The moving template 32 has a first chamber 322 and a second chamber 324 inside. The second chamber 324 is arranged around the outside of the mold groove 321. The first chamber 322 is correspondingly arranged on the back of the punch 3211. Both the first chamber 322 and the second chamber 324 are provided with air inlet pipes 37. The air inlet pipe 37 in the second chamber 324 is connected to multiple sets of air holes opened on the side of the mold groove 321. The air inlet pipe 37 in the first chamber 322 is connected to the air passage inside the punch 3211. Multiple sets of air holes are also opened on the surface of the punch 3211.

[0055] The bottom of the moving template 32 is connected to two sets of inflatable pistons 33, an inner gear plate 34 and a support plate 36. The front ends of the two sets of inflatable pistons 33 are fixedly connected to the bottom of both sides of the moving template 32, and the tail ends of the two sets of inflatable pistons 33 are fixedly connected through the support plate 36. A rack 313 is fixedly installed below the fixed base 31. The rack 313 is arranged horizontally along the moving direction of the moving template 32.

[0056] The drive unit includes a one-way gear 353, a rotating column 351, a turntable 352, a planetary gear 354, and a connecting plate 355. The one-way gear 353 is coaxially fixed to one end of the rotating column 351 facing the rack 313, and the turntable 352 is coaxially fixed to the other end of the rotating column 351. The planetary gear 354 is rotatably mounted on the eccentric position of the turntable 352. The internal gear disk 34 is fixedly connected to the tail end of the inflation piston 33 assembly through connecting rods on both sides. The internal gear disk 34 is coaxially arranged with the rotating column 351, and the planetary gear 354 meshes with the inner ring teeth of the internal gear disk 34. One end of the connecting plate 355 is eccentrically hinged to the end face of the planetary gear 354, and the other end is hinged to the end of the piston rod 333 of the inflation piston 33 assembly.

[0057] The one-way gear 353 consists of a gear seat 3531, a one-way wheel 3532, a double-toothed gear 3536, a wedge plate 3534, and a telescopic spring 3535. The gear seat 3531 is fixedly connected to the rotating column 351. The one-way wheel 3532 is fixedly connected to the outside of the gear seat 3531. The double-toothed gear 3536 is rotatably sleeved on the outside of the one-way wheel 3532. A groove 3533 is formed on the outer circumference of the one-way wheel 3532. The wedge plate 3534 is installed in the groove 3533. The inner wall of the double-toothed gear 3536... The device is equipped with a ratchet structure that engages with the wedge plate 3534. When the moving template 32 moves away from the fixed template 21, the double-toothed gear 3536 rolls forward along the rack 313, and the ratchet on the inner wall meshes with the wedge plate 3534, driving the one-way wheel 3532 and the rotating column 351 to rotate synchronously. When the moving template 32 moves closer to the fixed template 21, the double-toothed gear 3536 rolls in the opposite direction, the ratchet slides over the wedge plate 3534, and the one-way wheel 3532 and the rotating column 351 remain stationary, thus realizing one-way transmission.

[0058] The piston rod 333 is slidably sealed inside the inflatable piston 33. The piston cylinder is provided with an inlet one-way valve 38 and an outlet pipe 332 at one end near the moving template 32. A one-way outlet valve 331 is installed on the outlet pipe 332. The end of the outlet pipe 332 is connected to the inlet pipe 37 inside the moving template 32.

[0059] Among them, the support plate 36 is a transverse connecting plate 355, with both ends fixedly connected to the tail ends of the cylinder bodies of the two side air-filling pistons 33, and the whole moves synchronously with the moving template 32; the fixing plate 35 is vertically fixed on the middle end face of the support plate 36 and is used to install the rotating column 351.

[0060] The length of rack 313 covers the second half of the mold opening stroke. When the moving mold plate 32 closes the mold, the one-way gear 353 disengages from rack 313. After the moving mold plate 32 opens to the set position, the one-way gear 353 and rack 313 engage and start driving the piston to pump air.

[0061] During operation, cylinder 311 extends, driving the moving platen 32 to move along the guide rod 312 towards the fixed platen 21 until the moving platen 32 and the fixed platen 21 are tightly closed. The mold groove 321, the punch 3211 and the fixed platen 21 together form a closed injection cavity. At this time, molten plastic is injected into the cavity through the injection unit 2 for injection molding. During this process, the one-way gear 353 moves synchronously with the moving platen 32 towards the fixed platen 21, the double-tooth gear 3536 rotates in the opposite direction along the rack 313, the ratchet on the inner wall slides over the wedge plate 3534, the one-way structure slips, the rotating column 351 does not rotate, and the air-filled piston 33 assembly does not work.

[0062] After injection molding, cylinder 311 retracts, pulling the moving platen 32 away from the fixed platen 21, completing mold opening. The molded interior parts are attached to the mold groove 321 and punch 3211 of the moving platen 32. During the mold opening process, the moving platen 32 will drive the one-way gear 353 to move the rack 313 below the fixed base 31. At this time, the double-tooth gear 3536 rolls along the rack 313 in the forward direction. The ratchet inside the double-tooth gear 3536 will mesh with the wedge plate 3534, driving the rotating column 351 and the turntable 352 to rotate synchronously. When the turntable 352 rotates, it drives the planetary gear 354 to revolve within the inner gear disk 34. At the same time, it rotates on its own axis under the meshing action of the inner gear disk 34. During the rotation, the piston rod 333 is driven to reciprocate through the connecting plate 355. As the piston rod 333 moves away from the moving template 32, a negative pressure is formed inside the inflation piston 33. External air is drawn into the inflation piston 33 through the one-way valve 38. When the piston rod 333 moves towards the moving template 32, the air inside the inflation piston 33 is compressed and sent into the air inlet pipe 37 through the one-way outlet valve 331 and the outlet pipe 332. Finally, it is ejected from the air holes on the surface of the mold groove 321 and the punch 3211, forming a pulsed airflow. The pulsed airflow can quickly cool the newly formed interior parts and blow away plastic debris and impurities on the surface of the interior parts. At the same time, the continuous airflow thrust acts on the back of the interior parts, smoothly blowing the interior parts off the mold groove 321 and the punch 3211, achieving damage-free pneumatic demolding.

[0063] Before the interior trim is blown off, cylinder 2 44 drives the receiving chamber 41 to rise to directly below the moving template 32. During the rising process, the chamber door 42 will close naturally under the action of gravity. When the interior trim is blown off, it will fall into the receiving chamber 41. After receiving the material, cylinder 2 44 drives the receiving chamber 41 to descend. After descending to the designated position, the top strip 421 on the chamber door 42 abuts against the top plate 45 on the side wall of the injection molding machine frame 1. At this time, the receiving chamber 41 continues to descend, while the chamber door 42 is lifted by the top plate 45 and cannot descend, thus opening the opening of the receiving chamber 41. The interior trim inside slides out from the opening, completing the automatic material discharge.

[0064] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. An injection mold for automotive interior parts with a cooling structure, comprising an injection molding frame (1) and an injection molding unit (2); the injection molding unit (2) is disposed on the injection molding frame (1), and the injection molding unit (2) includes a fixed template (21), characterized in that, It also includes a demolding unit (3) and a receiving unit (4); The demolding unit (3) includes a fixed base (31) and a moving template (32); the fixed base (31) is fixedly connected to the injection molding machine frame (1); a guide rod (312) and a cylinder (311) are provided on the fixed base (31); the output end of the cylinder (311) is connected to the moving template (32); the guide rod (312) is provided through the moving template (32); a mold groove (321) is provided on the side of the moving template (32) facing the fixed template (21). The moving template (32) has a first chamber (322) and a second chamber (324) inside; both the first chamber (322) and the second chamber (324) are provided with air inlet pipes (37); the air inlet pipe (37) in the second chamber (324) is connected to the air hole on the side of the mold groove (321); the air inlet pipe (37) in the first chamber (322) is connected to the punch (3211); the punch (3211) has multiple sets of air holes. The bottom of the moving template (32) is provided with a driving unit; the driving unit includes an inflation piston (33); the inflation piston (33) is fixedly connected to the bottom of the moving template (32); the air outlet of the inflation piston (33) is connected to the air inlet pipe (37) for conveying cooling airflow to the mold groove (321) and the punch (3211).

2. The injection mold for automotive interior parts with a cooling structure according to claim 1, characterized in that, The drive unit further includes a rotating column (351), a turntable (352), an internal gear disc (34), a planetary gear (354), a connecting plate (355), and a one-way gear (353); a support plate (36) is fixedly connected to the side wall of the inflation piston (33); a fixing plate (35) is fixedly connected to the side wall of the support plate (36); the rotating column (351) is rotatably connected to the fixing plate (35); the one-way gear (353) is rotatably mounted on the rotating column (351); one end of the rotating column (351) away from the fixing plate (35) is connected to... Turntable (352) is fixedly connected; planetary gear (354) is rotatably connected to turntable (352); internal gear disk (34) is fixedly connected to inflation piston (33); planetary gear (354) is located inside internal gear disk (34) and meshes with the internal teeth of internal gear disk (34); one end of planetary gear (354) away from turntable (352) is rotatably connected to connecting plate (355); piston rod (333) is slidably connected inside inflation piston (33); connecting plate (355) is hinged to piston rod (333).

3. The injection mold for automotive interior parts with a cooling structure according to claim 2, characterized in that, The one-way gear (353) is composed of a double-toothed gear (3536), a wedge plate (3534), a telescopic spring (3535), a gear seat (3531), and a one-way wheel (3532); the gear seat (3531) is fixedly connected to the rotating column (351); the one-way wheel (3532) is fixedly connected to the outside of the gear seat (3531); the double-toothed gear (3536) is rotatably sleeved on the outside of the one-way wheel (3532) and is connected to the gear seat (3535). 1) Rotary connection; multiple sets of grooves (3533) are opened on the outer periphery of the one-way wheel (3532); the telescopic spring (3535) and the wedge plate (3534) are arranged in the groove (3533); the wedge plate (3534) and the groove (3533) are rotatably connected; the two ends of the telescopic spring (3535) are respectively fixed to the groove (3533) and the wedge plate (3534); the inner wall of the double toothed gear (3536) is provided with ratchet teeth.

4. The injection mold for automotive interior parts with a cooling structure according to claim 1, characterized in that, The inflation piston (33) is provided with an inlet one-way valve (38) and a one-way outlet valve (331); the piston rod (333) is slidably and sealed inside the inflation piston (33); the one-way outlet valve (331) is provided with an outlet pipe (332); the outlet pipe (332) is connected to the inlet pipe (37); the inlet one-way valve (38) is located at the end of the inflation piston (33).

5. The injection mold for automotive interior parts with a cooling structure according to claim 1, characterized in that, The receiving unit (4) is located inside the injection molding machine frame (1); the receiving unit (4) includes a receiving chamber (41), a chamber door (42), a top bar (421), a telescopic column (43), a cylinder two (44), and a top plate (45); the receiving chamber (41) is located below the demolding unit (3).

6. The injection mold for automotive interior parts with a cooling structure according to claim 5, characterized in that, The door (42) is slidably disposed inside the receiving chamber (41); the top bar (421) is fixedly connected to the door (42); the top plate (45) is fixedly connected to the side wall of the injection molding machine frame (1) and abuts against the top bar (421); the telescopic column (43) and the second cylinder (44) are disposed at the bottom of the receiving chamber (41).

7. The injection mold for automotive interior parts with a cooling structure according to claim 1, characterized in that, The bottom of the fixed base (31) is fixedly connected to a rack (313); the rack (313) is movably engaged with a one-way gear (353).

8. The injection mold for automotive interior parts with a cooling structure according to claim 1, characterized in that, The fixed template (21) is fixed on the injection molding machine frame (1); the moving template (32) is driven by cylinder (311) to close with the fixed template (21).

9. The injection mold for automotive interior parts with a cooling structure according to claim 8, characterized in that, The pores are formed on the non-surface molded surface of the injection molded part, and the pore diameter is smaller than the critical size for the injection molten material to flow in.

10. The injection mold for automotive interior parts with a cooling structure according to claim 2, characterized in that, The ratio of the number of teeth of the internal gear disk (34) to the number of teeth of the planetary gear (354) is 2:1.

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