Injection molding device for automobile interior covering parts

Abstract

The present invention relates to the field of mold technology, and specifically discloses an injection molding device for an automobile interior covering part, including a lower mold and an upper mold, wherein a mold cavity is provided in the lower mold, the upper mold is located in the mold cavity, a sliding assembly is provided at the top of the upper mold, the sliding assembly is slidably installed on the top of the upper mold, the sliding assembly includes two groups of first sliding cores, two groups of second sliding cores and four groups of third sliding cores, a rotating drum is provided at the top of the upper mold, and the bottom of the rotating drum is rotatably connected to the top of the upper mold. After the injection molding is completed and cooled, the rotating drum is rotated first, and the sliding sleeve is lifted upward, and the first sliding core, the second sliding core and the third sliding core are all moved a certain distance in the direction close to the rotating drum, and the tightening part of the covering part is not stuck in the tightening groove, so that the mold can be directly demolded downward, which is very convenient and efficient when demolding; when the upper mold and the lower mold are combined and separated, the core pulling function can be completed by rotating the rotating drum and lifting the sliding sleeve upward, which is very simple to operate and increases efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of molds, and in particular to an injection molding device for automobile interior covering parts. Background Art

[0002] The car interior system is an important part of the car body, and the design workload of the interior system accounts for more than 60% of the car styling design workload, far exceeding the car's appearance, and is one of the most important parts of the car body. The design of the interior system and the design of the body exterior covering are also very important. The car interior mainly includes the following subsystems: instrument panel system, sub-instrument panel system, door inner panel system, ceiling system, seat system, pillar panel system, other cab interior parts system, cab air circulation system, trunk interior parts system, engine compartment interior parts system, etc.

[0003] Automobile interior covering parts generally have an inward tightening part on the edge to achieve a better covering effect; covering parts are generally injection molded, and during the injection molding process of the covering part as a whole, the tightening part needs to be injection molded as a whole. Due to the existence of the tightening part, the injection molding process is relatively complicated, and a complex core pulling mechanism is required to complete the injection molding and demolding, resulting in low efficiency during production. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an injection molding device for automobile interior covering parts.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An injection molding device for an automobile interior covering part comprises a lower mold and an upper mold, wherein a mold cavity is provided in the lower mold, the upper mold is located in the mold cavity, a sliding assembly is provided at the top of the upper mold, the sliding assembly is slidably installed on the top of the upper mold, the sliding assembly comprises two groups of first sliding cores, two groups of second sliding cores and four groups of third sliding cores, a rotating cylinder is provided at the top of the upper mold, the bottom of the rotating cylinder is rotatably connected to the top of the upper mold, a first connecting rod and a second connecting rod are provided outside the rotating cylinder, the rotating cylinder is connected to the first sliding core through the first connecting rod, and is connected to the second sliding core through the second connecting rod, a sliding sleeve is provided on the outside of the rotating cylinder, a third connecting rod is provided on the outside of the sliding sleeve, the sliding sleeve is connected to the third sliding core through the third connecting rod, and a tightening groove is provided on the outer ring of the upper mold near the top.

[0007] Preferably, a first slide groove is opened on the top of the upper mold, the first slide core is slidably connected to the inner wall of the first slide groove, a first spring is arranged in the first slide groove, one end of the first spring is fixedly connected to the first slide core, and the other end is fixedly connected to the inner wall of the first slide groove, a first vertical groove is vertically opened on the side of the first slide core close to the rotating drum, a first vertical rod is arranged in the first vertical groove, a first fixed rod is fixedly connected to the outer side of the rotating drum, one end of the first connecting rod is connected to the first fixed rod, and the other end is connected to the first vertical rod.

[0008] Preferably, a second slide groove is opened on the top of the upper mold, the second slide core is slidably connected to the inner wall of the second slide groove, a second spring is arranged in the second slide groove, one end of the second spring is fixedly connected to the second slide core, and the other end is fixedly connected to the inner wall of the second slide groove, a second vertical groove is vertically opened on the side of the second slide core close to the rotating drum, a second vertical rod is arranged in the second vertical groove, a second fixed rod is fixedly connected to the outer side of the rotating drum, one end of the second connecting rod is connected to the second fixed rod, and the other end is connected to the second vertical rod.

[0009] Preferably, one end of the first connecting rod is rotatably connected to the first vertical rod along the vertical direction, the other end of the first connecting rod is rotatably connected to the first fixed rod along the vertical direction, one end of the second connecting rod is rotatably connected to the second vertical rod along the vertical direction, the other end of the second connecting rod is rotatably connected to the second fixed rod along the vertical direction, and the moving directions of the first sliding core and the second sliding core are perpendicular to each other.

[0010] Preferably, a third fixing rod is provided on the outer side of the sliding sleeve, one end of the third connecting rod is fixedly connected to the third fixing rod, and the other end is fixedly connected to a side of the third sliding core close to the rotating drum.

[0011] Preferably, a third slide groove is opened on the top of the upper mold, the third slide core is slidably connected to the inner wall of the third slide groove, a third spring is arranged in the third slide groove, one end of the third spring is fixedly connected to the third slide core, and the other end is fixedly connected to the inner wall of the third slide groove.

[0012] Preferably, the sliding sleeve is located above the first fixing rod and the second fixing rod, and the third fixing rod is made of elastic material.

[0013] Preferably, a mounting groove is opened at the top of the upper mold, a pin is installed inside the mounting groove, an inclined block is rotatably connected to the outer side of the pin, a fourth spring is provided at the bottom of the inclined block, the bottom of the fourth spring is fixedly connected to the bottom of the mounting groove, and the top of the fourth spring is fixedly connected to the bottom of the inclined block.

[0014] Preferably, the inclined surface at the top of the inclined block can contact with the first fixing rod and clamp the first fixing rod.

[0015] Preferably, a through hole is provided inside the rotating drum, the through hole passes through the upper mold, the bottom of the through hole is connected to the mold cavity, and a threaded hole is provided at the bottom of the through hole, and a bolt is provided in the threaded hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention is achieved by first rotating the drum after the injection molding is completed and cooled, and then driving the first sliding core to move in the direction close to the drum through the first fixed rod, the first connecting rod and the first vertical rod, and driving the second sliding core to move in the direction close to the drum through the second fixed rod, the second connecting rod and the second vertical rod. The first fixed rod is stuck by the inclined block after passing through the inclined block, and then the sliding sleeve is lifted upward, and the sliding sleeve drives the third sliding core to move in the direction close to the drum through the third fixed rod and the third connecting rod. At this time, the covering member is still wrapped on the bottom of the upper mold, and the first sliding core, the second sliding core and the third sliding core all move a certain distance in the direction close to the drum, and the tightening part of the covering member is not stuck in the tightening groove, so that the mold can be directly demolded downward, which is very convenient and efficient when demolding. When the upper mold and the lower mold are combined and the upper mold and the lower mold are separated, the core pulling function can be completed by rotating the drum and lifting the sliding sleeve upward, and the operation is very simple and the efficiency is increased.

[0018] In the present invention, by moving the upper mold up and down, the first slide core, the second slide core and the third slide core are pressed against the mold cavity wall of the lower mold, so the space in the mold cavity can be directly adjusted, thereby adjusting the thickness of the covering part. When producing covering parts of different thicknesses, there is no need to replace the mold, thereby saving time and improving production efficiency. There is no need to reserve too many molds, saving a lot of resources.

[0019] In the present invention, when the fluidity of the coating injection molding is poor, it can be injected from the middle through the through hole and flow from the middle to both sides. When the coating is uneven, injection molding from one end is likely to produce cavities and bubbles, while injection molding from the middle is not likely to produce cavities and bubbles, thereby reducing the number of defective injection molding products. When through-hole injection molding is not used, the through-hole can also be blocked with bolts, and other feed ports can be used for injection molding. The best injection molding method can be selected, thereby increasing the flexibility of injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the top of the upper mold of the present invention;

[0022] Figure 3 As shown in the present invention Figure 1 A magnified schematic diagram of part A;

[0023] Figure 4 As shown in the present invention Figure 2 A magnified schematic diagram of part B;

[0024] Figure 5 As shown in the present invention Figure 2 An enlarged schematic diagram of the C portion;

[0025] Figure 6 It is a schematic diagram of the installation structure of the slider of the present invention;

[0026] Figure 7 It is a structural schematic diagram of the lower mold of the present invention;

[0027] Figure 8 It is a structural schematic diagram of the bottom of the upper mold of the present invention;

[0028] Fig. 9 It is a cross-sectional view of the rotary drum of the present invention.

[0029] In the figure: 1, lower mold; 2, upper mold; 3, sliding assembly; 4, rotating cylinder; 5, fixed block; 6, sliding sleeve; 7, first sliding core; 8, second sliding core; 9, third sliding core; 10, first connecting rod; 11, first fixed rod; 12, first vertical groove; 13, first vertical rod; 14, first sliding groove; 15, first spring; 16, second connecting rod; 17, second fixed rod; 18, second vertical groove; 19, second sliding groove; 20, second spring; 21, third connecting rod; 22, third fixed rod; 23, third sliding groove; 24, third spring; 25, inclined block; 26, pin; 27, mounting groove; 28, fourth spring; 29, cavity wall; 30, tightening groove; 31, through hole. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Reference Figure 1-9 , an injection molding device for an automobile interior covering part, comprising a lower mold 1 and an upper mold 2, wherein a mold cavity is provided in the lower mold 1, the upper mold 2 is located in the mold cavity, a sliding assembly 3 is provided on the top of the upper mold 2, the sliding assembly 3 is slidably installed on the top of the upper mold 2, the sliding assembly 3 comprises two groups of first sliding cores 7, two groups of second sliding cores 8 and four groups of third sliding cores 9, a rotating cylinder 4 is provided on the top of the upper mold 2, the bottom of the rotating cylinder 4 is rotatably connected to the top of the upper mold 2, a first connecting rod 10 and a second connecting rod 16 are provided on the outside of the rotating cylinder 4, the rotating cylinder 4 is connected to the first sliding core 7 through the first connecting rod 10, and is connected to the second sliding core 8 through the second connecting rod 16, a sliding sleeve 6 is provided on the outside of the rotating cylinder 4, a third connecting rod 21 is provided on the outside of the sliding sleeve 6, the sliding sleeve 6 is connected to the third sliding core 9 through the third connecting rod 21, and a tightening groove 30 is provided on the outer ring of the upper mold 2 near the top.

[0032] As a technical optimization solution of the present invention, a first slide groove 14 is provided on the top of the upper mold 2, the first slide core 7 is slidably connected to the inner wall of the first slide groove 14, a first spring 15 is provided in the first slide groove 14, one end of the first spring 15 is fixedly connected to the first slide core 7, and the other end is fixedly connected to the inner wall of the first slide groove 14, a first vertical groove 12 is vertically provided on the side of the first slide core 7 close to the rotating drum 4, a first vertical rod 13 is provided in the first vertical groove 12, a first fixed rod 11 is fixedly connected to the outer side of the rotating drum 4, one end of the first connecting rod 10 is connected to the first fixed rod 11, and the other end It is connected to the first vertical rod 13, and a second slide groove 19 is provided on the top of the upper mold 2. The second slide core 8 is slidably connected to the inner wall of the second slide groove 19. A second spring 20 is provided in the second slide groove 19. One end of the second spring 20 is fixedly connected to the second slide core 8, and the other end is fixedly connected to the inner wall of the second slide groove 19. A second vertical groove 18 is vertically provided on the side of the second slide core 8 close to the rotating drum 4, and a second vertical rod is provided in the second vertical groove 18. A second fixed rod 17 is fixedly connected to the outer side of the rotating drum 4. One end of the second connecting rod 16 is connected to the second fixed rod 17, and the other end is connected to the second vertical rod.

[0033] As a technical optimization scheme of the present invention, one end of the first connecting rod 10 is rotatably connected to the first vertical rod 13, the other end of the first connecting rod 10 is rotatably connected to the first fixed rod 11 along the vertical direction, one end of the second connecting rod 16 is rotatably connected to the second vertical rod, the other end of the second connecting rod 16 is rotatably connected to the second fixed rod 17 along the vertical direction, and the moving directions of the first sliding core 7 and the second sliding core 8 are perpendicular to each other; when the rotating drum 4 is rotated, it is convenient for the rotating drum 4 to drive the first sliding core 7 to move through the first fixed rod 11 and the first connecting rod 10, and it is convenient for the rotating drum 4 to drive the second sliding core 8 to move through the second fixed rod 17 and the second connecting rod 16.

[0034] As a technical optimization solution of the present invention, a third fixed rod 22 is provided on the outside of the sliding sleeve 6, one end of the third connecting rod 21 is fixedly connected to the third fixed rod 22, and the other end is fixedly connected to the side of the third sliding core 9 close to the rotating drum 4, a third sliding groove 23 is opened on the top of the upper mold 2, the third sliding core 9 is slidingly connected to the inner wall of the third sliding groove 23, and a third spring 24 is provided in the third sliding groove 23, one end of the third spring 24 is fixedly connected to the third sliding core 9, and the other end is fixedly connected to the inner wall of the third sliding groove 23. After the injection molding is completed and cooled, the drum 4 is rotated first, and the first sliding core 7 is driven to move toward the drum 4 through the first fixed rod 11, the first connecting rod 10 and the first vertical rod 13, and the second sliding core 8 is driven to move toward the drum 4 through the second fixed rod 17, the second connecting rod 16 and the second vertical rod. The first fixed rod 11 is stuck by the inclined block 25 after passing through the inclined block 25, and then the sliding sleeve 6 is lifted upward, and the sliding sleeve 6 drives the third sliding core 9 to move toward the drum 4 through the third fixed rod 22 and the third connecting rod 21. At this time, the covering is still wrapped at the bottom of the upper mold 2, the first sliding core 7, the second sliding core 8 are reset, and the third sliding core 9 is moved a certain distance toward the drum 4. The tightening part of the covering is not stuck in the tightening groove 30, so that the mold can be directly demolded downward, which is very convenient and efficient when demolding.

[0035] As a technical optimization solution of the present invention, the sliding sleeve 6 is located above the first fixing rod 11 and the second fixing rod 17, and the third fixing rod 22 is made of elastic material. It is convenient for the sliding sleeve 6 to drive the third sliding core 9 to move through the third fixing rod 22 and the third connecting rod 21 when moving, and the first connecting rod 10 and the second connecting rod 16 can also be made of elastic material, such as high temperature resistant rubber.

[0036] As a technical optimization solution of the present invention, an installation groove 27 is opened at the top of the upper mold 2, a pin shaft 26 is installed inside the installation groove 27, an inclined block 25 is rotatably connected to the outer side of the pin shaft 26, a fourth spring 28 is provided at the bottom of the inclined block 25, the bottom of the fourth spring 28 is fixedly connected to the bottom of the installation groove 27, the top of the fourth spring 28 is fixedly connected to the bottom of the inclined block 25, and the inclined surface at the top of the inclined block 25 can contact the first fixed rod 11 and clamp the first fixed rod 11. The first fixed rod 11 rotates to a certain angle, and the bottom of the first fixed rod 11 contacts the top of the inclined block 25 and presses the inclined block 25 downward. One end of the inclined block 25 rotates along the pin shaft 26, and the other end presses the fourth spring 28 downward. After the first fixed rod 11 passes the top of the inclined block 25, the rotation of the rotating drum 4 is stopped. Under the action of the first spring 15 and the second spring 20, the first sliding core 7 and the second sliding core 8 tend to reset. The first sliding core 7 and the second sliding core 8 will pull the first connecting rod 10 and the second connecting rod 16 in the opposite direction, thereby driving the rotating drum 4 to rotate in the opposite direction. When the rotating drum 4 reverses, the first fixed rod 11 contacts one end of the inclined block 25, and the inclined block 25 prevents the first fixed rod 11 from rotating, thereby preventing the rotating drum 4 from reversing, and fixing the rotating drum 4, the first sliding core 7 and the second sliding core 8.

[0037] As a technical optimization solution of the present invention, a through hole 31 is provided inside the rotating drum 4. The through hole 31 passes through the upper mold 2, and the bottom of the through hole 31 is connected to the mold cavity, and a threaded hole is provided at the bottom of the through hole 31, and a bolt is provided in the threaded hole. When the coating has poor fluidity during injection molding, it can be injected from the middle through the through hole 31 and flow from the middle to both sides. When the coating is uneven, cavities and bubbles are easily generated by injection molding from one end, while cavities and bubbles are not easily generated by injection molding from the middle, thereby reducing the number of defective injection molding products. A feed port is also provided in the middle of the upper mold 2. When the through hole 31 is not used for injection molding, the through hole 31 can also be blocked with bolts. When other feed ports are used for injection molding, the best injection molding method can be selected, thereby increasing the flexibility of injection molding.

[0038] When the present invention is in use, the first slide core 7, the second slide core 8 and the third slide core 9 form a rectangular shape of the edge of the covering part. The staff first rotates the rotating drum 4, and the rotating drum 4 drives the first fixed rod 11 and the second fixed rod 17 to move. The first fixed rod 11 is rotatably connected with the first connecting rod 10, and the second fixed rod 17 is rotatably connected with the second connecting rod 16. The first fixed rod 11 and the second fixed rod 17 will pull the first connecting rod 10 and the second connecting rod 16. The other end of the first connecting rod 10 pulls the first vertical rod 13, thereby driving the first slide core 7 to move along the first slide groove 14 in the direction close to the rotating drum 4, the first slide core 7 squeezes the first spring 15, and the second connecting rod 16 pulls the second vertical rod, thereby driving the second slide core 8 to move along the second slide groove 19 in the direction close to the rotating drum 4, and the second slide core 8 squeezes the second spring 20;

[0039] When the first fixed rod 11 rotates to a certain angle, the bottom of the first fixed rod 11 contacts the top of the inclined block 25 and presses the inclined block 25 downward. One end of the inclined block 25 rotates along the pin shaft 26, and the other end presses the fourth spring 28 downward. After the first fixed rod 11 passes the top of the inclined block 25, the rotation of the rotating drum 4 is stopped. Under the action of the first spring 15 and the second spring 20, the first sliding core 7 and the second sliding core 8 tend to reset. The first sliding core 7 and the second sliding core 8 will pull the first connecting rod 10 and the second connecting rod 16 in the opposite direction, thereby driving the rotating drum 4 to rotate in the opposite direction. When the rotating drum 4 reverses, the first fixed rod 11 contacts one end of the inclined block 25, and the inclined block 25 prevents the first fixed rod 11 from rotating, thereby preventing the rotating drum 4 from reversing, and fixing the rotating drum 4, the first sliding core 7 and the second sliding core 8.

[0040] Then the staff lifts the sliding sleeve 6 upwards, and the sliding sleeve 6 can rotate and slide relative to the rotating drum 4. When the sliding sleeve 6 moves upward, one end of the third connecting rod 21 is pulled upward, and the other end of the third connecting rod 21 pulls the third sliding core 9, and the third sliding core 9 moves along the third sliding groove 23 in the direction close to the rotating drum 4. At this time, the third spring 24 is compressed, and the first sliding core 7 and the second sliding core 8 have moved a certain distance in the direction close to the rotating drum 4, so the first sliding core 7 and the second sliding core 8 will not block the movement of the third sliding core 9. After the third sliding core 9 moves a small distance, the upper mold 2 can be prevented from entering the lower mold 1 through the external telescopic rod, and the moving part of the external telescopic rod is connected to the fixed block 5;

[0041] After the upper mold 2 is placed in the lower mold 1, the sliding sleeve 6 is released, the third spring 24 is reset, and the third sliding core 9 is pushed away from the rotating drum 4. The third sliding core 9 is reset and abuts against the cavity wall 29 of the lower mold 1. Then the staff pushes the inclined block 25 downward. One end of the inclined block 25 rotates along the pin shaft 26, and the other end moves downward and squeezes the fourth spring 28. When the height of the top of the inclined block 25 is lower than the mounting groove 27, the inclined block 25 no longer blocks the first fixed rod 11. At this time, the first spring 15 and the second spring 20 are reset, driving the first sliding core 7 and the second sliding core 8 to reset. The first sliding core 7 and the second sliding core 8 both abut against the cavity wall 29 of the lower mold 1. The first sliding core 7, the second sliding core 8 and the third sliding core 9 are all provided with high temperature resistant sealing strips.

[0042] Injection molding can begin after the first slide core 7, the second slide core 8 and the third slide core 9 are against the mold cavity wall 29. A through hole 31 is provided on the rotating cylinder 4. A feed nozzle matched with the through hole 31 can be used to inject molding into the mold cavity through the through hole 31. An exhaust hole is provided on the third slide core 9. A tightening groove 30 is provided on the upper mold 2, and the tightening part of the covering is inside the tightening groove 30.

[0043] After the injection molding is completed and cooled, the drum 4 is rotated first, and the first sliding core 7 is driven to move toward the drum 4 through the first fixed rod 11, the first connecting rod 10 and the first vertical rod 13, and the second sliding core 8 is driven to move toward the drum 4 through the second fixed rod 17, the second connecting rod 16 and the second vertical rod. The first fixed rod 11 is stuck by the inclined block 25 after passing through the inclined block 25, and then the sliding sleeve 6 is lifted upward, and the sliding sleeve 6 drives the third sliding core 9 to move toward the drum 4 through the third fixed rod 22 and the third connecting rod 21. The covering member is still wrapped at the bottom of the upper mold 2. At this time, the first sliding core 7, the second sliding core 8 are reset and the third sliding core 9 are all moved a certain distance toward the drum 4. The tightening part of the covering member is not stuck in the tightening groove 30, so that the mold can be directly demolded downward, which is very convenient and efficient when demolding.

[0044] When the upper mold 2 and the lower mold 1 are combined or separated, the core pulling function can be completed by rotating the rotating drum 4 and lifting the sliding sleeve 6 upwards. The operation is very simple and the efficiency is increased.

[0045] By moving the upper mold 2 up and down, resetting the first slide core 7 and the second slide core 8 and pressing the third slide core 9 against the mold cavity wall 29 of the lower mold 1, the space in the mold cavity can be directly adjusted, thereby adjusting the thickness of the covering part. When producing covering parts of different thicknesses, there is no need to replace the mold, thereby saving time and improving production efficiency. There is no need to keep too many molds in reserve, saving a lot of resources.

[0046] When the injection molding fluidity of the covering part is poor, it can be injected from the middle through the through hole 31 and flow from the middle to both sides. When the covering part is uneven, injection molding from one end is likely to produce cavities and bubbles, while injection molding from the middle is not likely to produce cavities and bubbles, thereby reducing the number of defective injection molding products.

[0047] A feed port is also provided in the middle of the upper mold 2. When the through hole 31 is not used for injection molding, the through hole 31 can also be blocked with bolts, and other feed ports can be used for injection molding. The best injection molding method can be selected, which increases the flexibility of injection molding.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An injection molding device for automobile interior covering parts, comprising a lower mold (1) and an upper mold (2), characterized in that: The lower mold (1) is provided with a mold cavity, the upper mold (2) is located in the mold cavity, a sliding assembly (3) is provided on the top of the upper mold (2), the sliding assembly (3) is slidably mounted on the top of the upper mold (2), the sliding assembly (3) comprises two groups of first sliding cores (7), two groups of second sliding cores (8) and four groups of third sliding cores (9), a rotating cylinder (4) is provided on the top of the upper mold (2), the bottom of the rotating cylinder (4) is rotatably connected to the top of the upper mold (2), a first connecting rod (10) and a second connecting rod (16) are provided on the outside of the rotating cylinder (4), the rotating cylinder (4) is connected to the first sliding core (7) through the first connecting rod (10), and is connected to the second sliding core (8) through the second connecting rod (16), a sliding sleeve (6) is provided on the outside of the rotating cylinder (4), a third connecting rod (21) is provided on the outside of the sliding sleeve (6), the sliding sleeve (6) is connected to the third sliding core (9) through the third connecting rod (21), and a tightening groove (30) is provided on the outer ring of the upper mold (2) near the top; A first slide groove (14) is provided on the top of the upper mold (2), the first slide core (7) is slidably connected to the inner wall of the first slide groove (14), a first spring (15) is provided in the first slide groove (14), one end of the first spring (15) is fixedly connected to the first slide core (7), and the other end is fixedly connected to the inner wall of the first slide groove (14), a first vertical groove (12) is vertically provided on the side of the first slide core (7) close to the rotating drum (4), a first vertical rod (13) is provided in the first vertical groove (12), a first fixed rod (11) is fixedly connected to the outer side of the rotating drum (4), one end of the first connecting rod (10) is connected to the first fixed rod (11), and the other end is connected to the first vertical rod (13); A second slide groove (19) is provided on the top of the upper mold (2), the second slide core (8) is slidably connected to the inner wall of the second slide groove (19), a second spring (20) is provided in the second slide groove (19), one end of the second spring (20) is fixedly connected to the second slide core (8), and the other end is fixedly connected to the inner wall of the second slide groove (19), a second vertical groove (18) is vertically provided on the side of the second slide core (8) close to the rotating drum (4), a second vertical rod is provided in the second vertical groove (18), a second fixed rod (17) is fixedly connected to the outer side of the rotating drum (4), one end of the second connecting rod (16) is connected to the second fixed rod (17), and the other end is connected to the second vertical rod; One end of the first connecting rod (10) is connected to the first vertical rod (13) for rotation in the vertical direction, the other end of the first connecting rod (10) is connected to the first fixed rod (11) for rotation in the vertical direction, one end of the second connecting rod (16) is connected to the second vertical rod for rotation in the vertical direction, the other end of the second connecting rod (16) is connected to the second fixed rod (17) for rotation in the vertical direction, and the moving directions of the first sliding core (7) and the second sliding core (8) are perpendicular to each other; A third fixing rod (22) is provided on the outside of the sliding sleeve (6); one end of the third connecting rod (21) is fixedly connected to the third fixing rod (22), and the other end is fixedly connected to a side of the third sliding core (9) close to the rotating drum (4); A third slide groove (23) is provided at the top of the upper mold (2), the third slide core (9) is slidably connected to the inner wall of the third slide groove (23), a third spring (24) is provided in the third slide groove (23), one end of the third spring (24) is fixedly connected to the third slide core (9), and the other end is fixedly connected to the inner wall of the third slide groove (23).

2. The injection molding device for automobile interior covering parts according to claim 1, characterized in that: The sliding sleeve (6) is located above the first fixing rod (11) and the second fixing rod (17), and the third fixing rod (22) is made of elastic material.

3. The injection molding device for automobile interior covering parts according to claim 1, characterized in that: The top of the upper mold (2) is provided with a mounting groove (27), a pin shaft (26) is installed inside the mounting groove (27), an inclined block (25) is rotatably connected to the outer side of the pin shaft (26), a fourth spring (28) is provided at the bottom of the inclined block (25), the bottom of the fourth spring (28) is fixedly connected to the bottom of the mounting groove (27), and the top of the fourth spring (28) is fixedly connected to the bottom of the inclined block (25).

4. The injection molding device for automobile interior covering parts according to claim 3, characterized in that: The inclined surface at the top of the inclined block (25) is capable of contacting the first fixing rod (11) and clamping the first fixing rod (11).

5. The injection molding device for automobile interior covering parts according to claim 1, characterized in that: A through hole (31) is provided inside the rotating cylinder (4), the through hole (31) passes through the upper mold (2), the bottom of the through hole (31) is connected to the mold cavity, and a threaded hole is provided at the bottom of the through hole (31), and a bolt is provided in the threaded hole.

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