Injection mold for automobile thin-wall deep-cavity injection molded parts and rapid demoulding method

Abstract

The present invention discloses an injection mold and a rapid demoulding method for automobile thin-wall deep-cavity injection molded parts, relating to the technical field of injection molds, comprising a fixing frame, wherein the bottom end of the fixing frame is fixedly connected to a lower mold, an upper mold is provided on the top of the lower mold, and a pouring hole for injection molding is provided on the top of the upper mold. The invention also comprises: a connecting plate provided on the top of the upper mold, the bottom of the connecting plate is fixedly connected to an upper ejector rod, and the upper ejector rod extends into the interior of the upper mold. When the limit sleeve is driven to rise, the limit sleeve cooperates with the limit groove on the outside of the rotating rod through the limit shaft to rotate the rotating rod. When the rotating rod rotates, the stop block corresponds to the adapter groove, and the first spring of the same specification pulls the rotating disk to make the rotating rod rise quickly, so that the upper ejector rod rises quickly, thereby separating the upper ejector rod from the contacted model, achieving the effect of secondary separation, and avoiding the existing model separation causing the model and the upper mold to stick together and cause damage.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to an injection mold for thin-wall deep-cavity injection molded parts of automobiles and a rapid demoulding method. Background Art

[0002] With the development of automobile technology, many lightweight improvements have been made to automobiles. Among them, the most important thing in lightweight design is to replace materials. Therefore, more and more plastic materials are used in automobile parts, and the injection molding process is basically used in the production of plastic parts.

[0003] An injection mold for producing automobile parts disclosed in a patent application with reference publication number CN117464932B belongs to the field of automobile parts injection molding, and includes a base, the top of the base is fixedly connected to a lower mold frame, the top of the base is fixedly installed with a top seat, a cylinder is fixedly installed on the top seat, and the output end of the cylinder is fixedly connected to an upper mold plate adapted to the lower mold frame, and also includes: a vibration mechanism, the vibration mechanism includes a bottom mold plate slidably installed in the lower mold frame, the bottom of the bottom mold plate is rotatably installed with a rotating seat, the bottom of the rotating seat is in contact with a mounting rod, a vertical rod is slidably installed in the mounting rod, and the bottom of the vertical rod is fixedly connected to a rotating plate; it can improve the fluidity of the injection slurry and facilitate the injection slurry to fit the corners in the mold, which can effectively avoid the situation where the amount of injection slurry in the corners is insufficient, resulting in incomplete final mold molding, thereby effectively improving the quality of the mold and avoiding unnecessary losses.

[0004] In the above scheme, vibration is used to make the material enter the upper and lower molds evenly. When the molds are separated, due to the adhesion between the mold and the model, the model is easily damaged when the upper and lower molds are separated; and a pouring head appears at the pouring gate of the mold. Each time the mold is disassembled, the pouring head needs to be manually sheared.

[0005] Therefore, it is necessary to provide an injection mold for automobile thin-wall deep-cavity injection molded parts and a rapid demoulding method to solve the above technical problems. Summary of the Invention

[0006] The object of the present invention is to provide an injection mold and a rapid demoulding method for thin-walled deep-cavity injection molded parts of automobiles, so as to solve the problems of the defects of the prior art mentioned in the above background technology.

[0007] Based on the above ideas, the present invention provides the following technical solution: an injection mold for thin-walled deep-cavity injection molded parts for automobiles, comprising a fixing frame, a lower mold fixedly connected to the bottom end of the fixing frame, an upper mold disposed on top of the lower mold, and a pouring hole for injection molding disposed on the top of the upper mold, and further comprising:

[0008] A connecting plate is provided on the top of the upper mold, and an upper ejector rod is fixedly connected to the bottom of the connecting plate. The upper ejector rod extends into the interior of the upper mold. A lifting member is provided between the upper mold and the fixing frame to drive the upper mold and the lower mold to close the mold. A limit member is provided between the connecting plate and the top of the fixing frame. When the lifting member drives the upper mold to rise, the upper ejector rod pushes the mold to separate from the upper mold;

[0009] The top of the upper mold is fixedly connected to a mounting frame, the mounting frame is arranged above the pouring hole, and the mounting frame is provided with a shearing piece for cleaning the pouring hole;

[0010] A connecting frame is provided at the bottom of the lower mold, and a lower ejector rod is fixedly connected to the top of the connecting frame. The lower ejector rod passes through the bottom of the lower mold and extends into the interior of the lower mold. A hydraulic rod for telescoping is fixedly connected between the connecting frame and the bottom end of the fixing frame.

[0011] As a further solution of the present invention: a rotating rod is rotatably connected to the top of the connecting plate, a limiting groove is provided on the outer side of the rotating rod, and a stopper is fixedly connected to the outer side of the rotating rod.

[0012] As a further solution of the present invention: the limit part includes a limit support plate, which is sleeved on the outside of the rotating rod, and an adaptation groove is opened on the outside of the limit support plate, which is adapted to the stop block, and the limit support plate is fixedly connected to the bottom end of the inner part of the fixed frame, and the top of the fixed frame is fixedly connected to the upper bracket, and the center of the upper bracket is rotatably connected to the rotating plate, and the outer side of the rotating rod is sleeved with a limit sleeve, and the inner wall of the limit sleeve is fixedly connected to the limit shaft, which extends to the inside of the limit groove opened on the outside of the rotating rod and is slidably connected to the limit groove, and the limit sleeve is fixedly connected to the upper mold.

[0013] As a further solution of the present invention: the limit member also includes a fixed rod fixedly connected to the top of the rotating rod, the fixed rod passes through the rotating plate and is movably connected to the rotating plate, the top of the rotating rod is rotatably connected to a rotating disk, and the rotating disk is rotatably sleeved on the outside of the fixed rod, and a first spring for squeezing the rotating rod is fixedly connected between the fixed rod and the rotating plate.

[0014] As a further solution of the present invention: the lifting member includes two screw rods, which respectively pass through the two sides of the upper mold and are connected to the upper mold through a ball nut pair. The screw rod passes through the top of the fixed frame and is rotatably connected to the fixed frame. The top of the fixed frame is fixedly connected to the drive motor, and the output shaft of the drive motor is fixedly connected to the screw rod.

[0015] As a further solution of the present invention: the shearing piece includes shear plates respectively arranged on both sides of the interior of the mounting frame, one end of the two shear plates is fixedly connected to a rotating shaft, the rotating shaft passes through the mounting frame and is rotatably connected to the mounting frame, a pulling block is provided between the two rotating shafts, and a rotating support rod is rotatably connected between the pulling block and the two shear plates, a cross plate is fixedly connected to the interior of the mounting frame, a telescopic rod and a second spring are fixedly connected between the cross plate and the pulling block, the second spring is sleeved on the outside of the telescopic rod, and a driving piece is provided on the top of the mounting frame for pushing the pulling block to move so that the two shear plates shear the material at the pouring hole.

[0016] As a further solution of the present invention: the driving member includes a rotating pull plate arranged inside the mounting frame, the top of the rotating pull plate is fixedly connected to the limit rod, the limit rod mounting frame is rotatably connected to the mounting frame, a spiral groove is opened on the outside of the limit rod, a fixing ring is sleeved on the outside of the limit rod, and a limiting protrusion is fixedly connected to the inner wall of the fixing ring, the limiting protrusion extends to the inside of the spiral groove opened on the outside of the limit rod and is slidably connected to the limit rod, the fixing ring is fixedly connected to the connecting plate, the bottom of the rotating pull plate is rotatably connected to the first pull plate, one end of the first pull plate is rotatably connected to the second pull plate, and the second pull plate is rotatably connected to the pulling block.

[0017] As a further solution of the present invention: a pushing arc plate is provided inside the installation frame, and both sides of the installation frame are fixedly connected to the limiting frame, and both sides of the pushing arc plate are fixedly connected to fixed plates, which extend to the inside of the limiting frame and are slidably connected to the limiting frame, and a vertical plate is fixedly connected to the inside of the installation frame, and a third spring is fixedly connected between the vertical plate and the pushing arc plate, a pull rope is fixedly connected to the outside of the pulling block, and the outside of the vertical plate is rotatably connected to the first guide wheel, and the inner wall of the installation frame is rotatably connected to the second guide wheel, and the pull rope passes through the first guide wheel and the second guide wheel in sequence and is fixedly connected to the fixed plate at one end passing through the limiting frame.

[0018] As a further solution of the present invention: the lower ejector rod is connected to the connecting frame, and an air outlet groove is provided on the outside of the lower ejector rod. An air pump is fixedly connected to the outside of the fixing frame, and the air outlet end of the air pump is fixedly connected to the connecting frame.

[0019] A method for quickly demoulding thin-walled deep-cavity injection molded parts for automobiles is also provided, comprising the following steps:

[0020] Step 1: After injection molding, the upper mold is driven to rise by starting the lifting member. The upper mold rises and the upper push rod at the bottom of the connecting plate pushes the model and the upper mold to separate;

[0021] Step 2: When the upper mold rises, the pouring part of the pouring hole is sheared by the shearing piece inside the mounting frame;

[0022] Step 3: Start the connection frame to rise so that the lower ejector rod fixed on the top of the connection frame can eject the model.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. When the limit sleeve is driven to rise, the limit sleeve cooperates with the limit groove on the outside of the rotating rod through the limit shaft to rotate the rotating rod. At this time, the stop block corresponds to the adapter groove, and the first spring of the same specification pulls the rotating disk to make the rotating rod rise quickly, so that the upper ejector rod rises quickly, thereby separating the upper ejector rod from the contacted model, achieving the effect of secondary separation, avoiding the existing model separation from causing the model and the upper mold to stick together and cause damage.

[0025] 2. The lower ejector rod pushes the model to a certain height, exposing the air outlet groove on the outside of the lower ejector rod. At this time, the air pump is started to blow air toward the connecting frame, and the air is discharged from the air outlet groove on the outside of the lower ejector rod through the connecting frame, thereby increasing the gap between the model and the lower mold to avoid damage when the lower mold is separated from the model.

[0026] 3. The limiting protrusion inside the fixed ring cooperates with the spiral groove on the outside of the limiting rod to make the limiting rod rotate and rise. When the limiting rod rotates, it drives the rotating pull plate fixed at the bottom to rotate. When the rotating pull plate rotates, it drives the first pull plate to rotate, pulling the second pull plate, and then the second pull plate pulls the pulling block closer to the horizontal plate. When the pulling block moves, the shear plate is pulled by the rotating support rod to rotate around the rotating axis, so that the two shear plates shear the pouring head at the pouring hole. Automatic shearing is performed during the separation of the upper mold and the model, avoiding manual processing at a later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings and examples.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 Schematic diagram of the upper mold and lower mold structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the upper mold of the present invention when viewed from above;

[0031] Figure 4 It is a schematic diagram of the lifting member structure of the present invention;

[0032] Figure 5 Schematic diagram of the structure of the position limiting member of the present invention;

[0033] Figure 6 It is a schematic diagram of the cross-sectional structure of the installation frame of the present invention;

[0034] Figure 7 This invention Figure 6 Schematic diagram of the enlarged structure of part B;

[0035] Figure 8 Schematic diagram of the shearing piece structure of the present invention;

[0036] Figure 9 It is a schematic diagram of the structure of the driving member of the present invention;

[0037] Figure 10 This invention Figure 9 A schematic diagram of the enlarged structure of part A;

[0038] Figure 11 It is a schematic diagram of the cross-sectional structure of the connection frame of the present invention.

[0039] In the figure: 1. fixing frame; 101. screw rod; 2. upper mold; 201. pouring hole; 3. lower mold; 4. connecting plate; 401. upper ejector rod; 402. rotating rod; 403. fixing plate; 404. limiting sleeve; 405. limiting shaft; 406. limiting groove; 407. stopper; 408. limiting support plate; 409. adapter groove; 410. first spring; 411. rotating disk; 412. fixing rod; 413. upper bracket; 414. rotating plate; 5. mounting frame; 501. shear plate; 502. rotating shaft; 503. pulling block; 504, rotating support rod; 505, horizontal plate; 506, telescopic rod; 507, second spring; 601, rotating pull plate; 602, limiting rod; 603, first pull plate; 604, second pull plate; 605, fixing ring; 701, pushing arc plate; 702, fixing plate; 703, limiting frame; 704, vertical plate; 705, third spring; 706, first guide wheel; 707, pull rope; 708, second guide wheel; 801, connecting frame; 802, lower ejector rod; 803, hydraulic rod; 804, air pump; 805, air outlet groove. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] like Figures 1 to 11 As shown, an injection mold for thin-walled deep-cavity injection molded parts of automobiles includes the following embodiments:

[0042] like Figures 1 to 3As shown, embodiment 1 includes a fixing frame 1, a lower mold 3 is fixedly connected to the bottom end of the fixing frame 1, an upper mold 2 is provided on the top of the lower mold 3, and a pouring hole 201 for injection molding is provided on the top of the upper mold 2, and further includes:

[0043] A connecting plate 4 is provided on the top of the upper mold 2, and an upper ejector rod 401 is fixedly connected to the bottom of the connecting plate 4. The upper ejector rod 401 extends into the interior of the upper mold 2. A lifting member is provided between the upper mold 2 and the fixing frame 1 to drive the upper mold 2 and the lower mold 3 to close the mold. A limit member is provided between the connecting plate 4 and the top of the fixing frame 1. When the lifting member drives the upper mold 2 to rise, the upper ejector rod 401 pushes the mold to separate from the upper mold 2;

[0044] The top of the upper mold 2 is fixedly connected with a mounting frame 5, which is arranged above the pouring hole 201. The mounting frame 5 is provided with a shearing piece for cleaning the pouring hole 201;

[0045] A connecting frame 801 is provided at the bottom of the lower mold 3, and a lower ejector rod 802 is fixedly connected to the top of the connecting frame 801. The lower ejector rod 802 passes through the bottom of the lower mold 3 and extends into the interior of the lower mold 3. A hydraulic rod 803 for extension and retraction is fixedly connected between the connecting frame 801 and the bottom end of the fixed frame 1.

[0046] In specific implementation, after injection molding, the upper mold 2 is driven to rise by starting the lifting member, and the upper mold 2 rises and pushes the model to separate from the upper mold 2 through the upper ejector rod 401 at the bottom of the connecting plate 4; when the upper mold 2 rises, the pouring place of the pouring hole 201 is sheared by the shearing member inside the mounting frame 5, and the lower ejector rod 802 fixedly connected to the top of the connecting frame 801 is started to rise to eject the model, thereby quickly separating the mold.

[0047] like Figures 4 and 5 As shown, in this embodiment, a rotating rod 402 is rotatably connected to the top of the connecting plate 4 , a limiting groove 406 is provided on the outer side of the rotating rod 402 , and a stopper 407 is fixedly connected to the outer side of the rotating rod 402 .

[0048] The limiting part includes a limiting support plate 408, which is sleeved on the outside of the rotating rod 402. An adapting groove 409 is opened on the outside of the limiting support plate 408, and the adapting groove 409 is adapted to the stop block 407. The limiting support plate 408 is fixedly connected to the bottom end of the inner part of the fixing frame 1, and the top of the fixing frame 1 is fixedly connected to the upper bracket 413, and the center of the upper bracket 413 is rotatably connected to the rotating plate 414. A limiting sleeve 404 is sleeved on the outside of the rotating rod 402, and the inner wall of the limiting sleeve 404 is fixedly connected to the limiting shaft 405. The limiting shaft 405 extends to the inside of the limiting groove 406 opened on the outside of the rotating rod 402, and is slidably connected to the limiting groove 406. 403 is fixedly connected between the limiting sleeve 404 and the upper mold 2.

[0049] The limiting member also includes a fixed rod 412 fixedly connected to the top of the rotating rod 402, the fixed rod 412 passes through the rotating plate 414 and is movably connected to the rotating plate 414, a rotating disk 411 is rotatably connected to the top of the rotating rod 402, and the rotating disk 411 is rotatably sleeved on the outside of the fixed rod 412, and a first spring 410 for squeezing the rotating rod 402 is fixedly connected between the fixed rod 412 and the rotating plate 414.

[0050] In specific implementation, when the lifting member drives the upper mold 2 to rise, since the outer side of the rotating rod 402 connected to the top of the connecting plate 4 is fixedly connected to the stopper 407, the limiting support plate 408 will clamp the rotating rod 402 at this time. When the upper mold 2 rises, the upper ejector rod 401 pushes the model inside the upper mold 2, so that the upper mold 2 and the internal model are fully separated. When the upper mold 2 rises, the outer side of the rotating rod 402 is provided with a limiting sleeve 404. When 403 drives the limiting sleeve 404 to rise, the limiting sleeve 404 is The sleeve 404 cooperates with the limiting groove 406 on the outside of the rotating rod 402 through the limiting shaft 405 to rotate the rotating rod 402. When the rotating rod 402 rotates, the stop block 407 corresponds to the adapter groove 409. The first spring 410 of the same specification pulls the rotating disk 411 to make the rotating rod 402 rise quickly, so that the upper ejector rod 401 rises quickly, thereby separating the upper ejector rod 401 from the contacted model, achieving a secondary separation effect, and avoiding the existing model separation causing the model and the upper mold to stick together and cause damage.

[0051] When resetting is required later, the fixing rod 412 is rotated to drive the rotating rod 402 to rotate, so that the stopper 407 passes through the limiting support plate 408 and then rotates to prepare for the next separation.

[0052] like Figure 11 and Figure 4 As shown, in this embodiment, the lifting member includes two screw rods 101, which respectively pass through both sides of the upper mold 2 and are connected to the upper mold 2 through a ball nut pair. The screw rod 101 passes through the top of the fixed frame 1 and is rotatably connected to the fixed frame 1. The top of the fixed frame 1 is fixedly connected to the drive motor, and the output shaft of the drive motor is fixedly connected to the screw rod 101.

[0053] The lower ejector rod 802 is connected to the connecting frame 801 , and an air outlet groove 805 is provided on the outside of the lower ejector rod 802 . An air pump 804 is fixedly connected to the outside of the fixing frame 1 , and the air outlet end of the air pump 804 is fixedly connected to the connecting frame 801 .

[0054] During specific implementation, when the model needs to be ejected from the lower mold 3, the hydraulic rod 803 is started, and the hydraulic rod 803 rises, driving the connecting frame 801 to rise, so that the lower ejector rod 802 pushes the model to a certain height, exposing the air outlet groove 805 opened on the outer side of the lower ejector rod 802. At this time, the air pump 804 is started again, and the air pump 804 blows air toward the connecting frame 801, and the air is discharged from the air outlet groove 805 opened on the outer side of the lower ejector rod 802 through the connecting frame 801, thereby increasing the gap between the model and the lower mold 3, and avoiding damage when the lower mold 3 is separated from the model.

[0055] like Figures 5 to 10 As shown, embodiment 2: the shearing piece includes shear plates 501 respectively arranged on both sides of the interior of the mounting frame 5, one end of the two shear plates 501 is fixedly connected with a rotating shaft 502, the rotating shaft 502 passes through the mounting frame 5 and is rotatably connected to the mounting frame 5, a pulling block 503 is provided between the two rotating shafts 502, and a rotating support rod 504 is rotatably connected between the pulling block 503 and the two shear plates 501, a horizontal plate 505 is fixedly connected inside the mounting frame 5, a telescopic rod 506 and a second spring 507 are fixedly connected between the horizontal plate 505 and the pulling block 503, and the second spring 507 is sleeved on the outside of the telescopic rod 506, and a driving member is provided on the top of the mounting frame 5 for pushing the pulling block 503 to move so that the two shear plates 501 can shear the material at the pouring hole 201.

[0056] The driving member includes a rotating pull plate 601 arranged inside the mounting frame 5, and the top of the rotating pull plate 601 is fixedly connected to the limiting rod 602, the limiting rod 602 is mounted on the mounting frame 5 and is rotatably connected to the mounting frame 5, a spiral groove is provided on the outside of the limiting rod 602, and a fixing ring 605 is sleeved on the outside of the limiting rod 602, and a limiting protrusion is fixedly connected to the inner wall of the fixing ring 605, and the limiting protrusion extends to the inside of the spiral groove provided on the outside of the limiting rod 602 and is slidably connected to the limiting rod 602, the fixing ring 605 is fixedly connected to the connecting plate 4, and the bottom of the rotating pull plate 601 is rotatably connected to the first pull plate 603, and one end of the first pull plate 603 is rotatably connected to the second pull plate 604, and the second pull plate 604 is rotatably connected to the pulling block 503.

[0057] In specific implementation, when the material enters between the upper mold 2 and the lower mold 3 through the pouring hole 201, a pouring head will inevitably form at the entrance of the pouring hole 201. It is necessary for personnel to manually reduce it each time, which is too cumbersome. Therefore, in this solution, when the upper mold 2 rises, since the connecting plate 4 remains relatively stationary relative to the upper mold 2, the limiting rod 602 passing through the top of the mounting frame 5 rises in the fixing ring 605, and the limiting protrusion inside the fixing ring 605 cooperates with the spiral groove on the outside of the limiting rod 602, so that the limiting rod 602 rotates and rises, and the limiting rod 602 rotates and rises. When the pull block 503 moves, the shear plate 501 is pulled to rotate around the rotating axis 502 by the rotating support rod 504, so that the two shear plates 501 shear the pouring head at the pouring hole 201. When the upper mold 2 is separated from the model, it is automatically sheared off, avoiding manual processing at a later stage.

[0058] like Figure 9 As shown, in this embodiment, a pushing arc plate 701 is provided inside the installation frame 5, and both sides of the interior of the installation frame 5 are fixedly connected to the limiting frame 703, and both sides of the pushing arc plate 701 are fixedly connected to the fixing plates 702, which extend to the interior of the limiting frame 703 and are slidably connected to the limiting frame 703, and a vertical plate 704 is fixedly connected inside the installation frame 5, and a third spring 705 is fixedly connected between the vertical plate 704 and the pushing arc plate 701, and a pull rope 707 is fixedly connected to the outside of the pulling block 503, and the outside of the vertical plate 704 is rotatably connected to the first guide wheel 706, and the inner wall of the installation frame 5 is rotatably connected to the second guide wheel 708, and the pull rope 707 passes through the first guide wheel 706 and the second guide wheel 708 in sequence and passes through one end of the limiting frame 703 and is fixedly connected to the fixing plate 702.

[0059] During specific implementation, when the shear plate 501 cuts off the pouring head, the pulling block 503 pulls the fixed plate 702 inside the limit frame 703 through the pull rope 707, so that the pushing arc plate 701 fixedly connected between the two fixed plates 702 moves away from the pulling block 503, so that the pushing arc plate 701 pushes the sheared pouring head waste to be discharged, so as to avoid affecting the next pouring. An opening is set at one end of the mounting frame 5, and the sheared pouring head can be discharged through the opening. Later, the pushing arc plate 701 is automatically pulled to reset by the third spring 705.

[0060] A method for quickly demoulding thin-walled deep-cavity injection molded parts for automobiles is also provided, comprising the following steps:

[0061] Step 1: After injection molding, the upper mold 2 is driven to rise by starting the lifting member. The upper mold 2 rises and pushes the mold to separate from the upper mold 2 through the upper push rod 401 at the bottom of the connecting plate 4;

[0062] Step 2: When the upper mold 2 rises, the shearing piece inside the mounting frame 5 is used to shear the pouring portion of the pouring hole 201;

[0063] Step 3: Start the connection frame 801 to rise, so that the lower ejector rod 802 fixedly connected to the top of the connection frame 801 ejects the model.

[0064] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0065] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0066] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold for thin-walled deep-cavity injection molded parts of an automobile, comprising a fixing frame (1), wherein the bottom end of the fixing frame (1) is fixedly connected to a lower mold (3), an upper mold (2) is arranged on the top of the lower mold (3), and a pouring hole (201) for injection molding is arranged on the top of the upper mold (2), characterized in that: Also includes: A connecting plate (4) is arranged on the top of the upper mold (2), and an upper ejector rod (401) is fixedly connected to the bottom of the connecting plate (4). The upper ejector rod (401) extends into the interior of the upper mold (2). A lifting member is provided between the upper mold (2) and the fixing frame (1) for driving the upper mold (2) and the lower mold (3) to close the mold. A limiting member is provided between the connecting plate (4) and the top of the fixing frame (1). When the lifting member drives the upper mold (2) to rise, the upper ejector rod (401) pushes the mold to separate from the upper mold (2); A mounting frame (5) is fixedly connected to the top of the upper mold (2), and the mounting frame (5) is arranged above the pouring hole (201). The mounting frame (5) is provided with a shearing piece for cleaning the pouring hole (201); A connecting frame (801) is provided at the bottom of the lower mold (3), a lower ejector rod (802) is fixedly connected to the top of the connecting frame (801), the lower ejector rod (802) passes through the bottom of the lower mold (3) and extends into the interior of the lower mold (3), and a hydraulic rod (803) for extension and retraction is fixedly connected between the connecting frame (801) and the bottom end of the interior of the fixing frame (1); The shearing member comprises shear plates (501) respectively arranged on both sides of the interior of the installation frame (5), one end of each of the two shear plates (501) is fixedly connected to a rotating shaft (502), the rotating shaft (502) passes through the installation frame (5) and is rotatably connected to the installation frame (5), a pulling block (503) is arranged between the two rotating shafts (502), a rotating support rod (504) is rotatably connected between the pulling block (503) and the two shear plates (501), a transverse plate (505) is fixedly connected inside the installation frame (5), a telescopic rod (506) and a second spring (507) are fixedly connected between the transverse plate (505) and the pulling block (503), the second spring (507) is sleeved on the outside of the telescopic rod (506), and a driving member is arranged on the top of the installation frame (5) for pushing the pulling block (503) to move so that the two shear plates (501) shear the material at the pouring hole (201); The driving member comprises a rotating pull plate (601) arranged inside the mounting frame (5); the top of the rotating pull plate (601) is fixedly connected to a limiting rod (602); the limiting rod (602) is mounted on the mounting frame (5) and is rotatably connected to the mounting frame (5); a spiral groove is provided on the outside of the limiting rod (602); a fixing ring (605) is sleeved on the outside of the limiting rod (602); a limiting protrusion is fixedly connected to the inner wall of the fixing ring (605); the limiting protrusion extends into the spiral groove provided on the outside of the limiting rod (602) and is slidably connected to the limiting rod (602); the fixing ring (605) is fixedly connected to the connecting plate (4); the bottom of the rotating pull plate (601) is rotatably connected to a first pulling plate (603); one end of the first pulling plate (603) is rotatably connected to a second pulling plate (604); the second pulling plate (604) is rotatably connected to the pulling block (503).

2. The injection mold for thin-walled deep-cavity automotive injection molded parts according to claim 1, characterized in that: The top of the connecting plate (4) is rotatably connected to a rotating rod (402), a limiting groove (406) is provided on the outside of the rotating rod (402), and a stopper (407) is fixedly connected to the outside of the rotating rod (402).

3. The injection mold for thin-walled deep-cavity automotive injection molded parts according to claim 2, characterized in that: The limiting member comprises a limiting support plate (408), the limiting support plate (408) being sleeved on the outside of the rotating rod (402), an adapting groove (409) being provided on the outside of the limiting support plate (408), the adapting groove (409) being adapted to the stopper (407), the limiting support plate (408) being fixedly connected to the bottom end of the interior of the fixing frame (1), the top of the fixing frame (1) being fixedly connected to an upper bracket (413), the center of the upper bracket (413) being rotatably connected to a rotating plate (414), the outer side of the rotating rod (402) being sleeved with a limiting sleeve (404), the inner wall of the limiting sleeve (404) being fixedly connected to a limiting shaft (405), the limiting shaft (405) extending into the interior of a limiting groove (406) provided on the outer side of the rotating rod (402), and being slidably connected to the limiting groove (406), and a fixing plate (403) being fixedly connected between the limiting sleeve (404) and the upper mold (2).

4. The injection mold for thin-walled deep-cavity automotive injection molded parts according to claim 3, characterized in that: The limiting member further comprises a fixed rod (412) fixedly connected to the top of the rotating rod (402), the fixed rod (412) passing through the rotating plate (414) and movably connected to the rotating plate (414), a rotating disk (411) rotatably connected to the top of the rotating rod (402), and the rotating disk (411) rotatably sleeved on the outside of the fixed rod (412), and a first spring (410) for squeezing the rotating rod (402) is fixedly connected between the fixed rod (412) and the rotating plate (414).

5. The injection mold for thin-walled deep-cavity automotive injection molded parts according to claim 1, characterized in that: The lifting member comprises two screw rods (101), the two screw rods (101) respectively passing through both sides of the upper mold (2) and being connected to the upper mold (2) via a ball nut pair, the screw rods (101) passing through the top of the fixing frame (1) and being rotatably connected to the fixing frame (1), the top of the fixing frame (1) being fixedly connected to a driving motor, and the output shaft of the driving motor being fixedly connected to the screw rods (101).

6. The injection mold for thin-walled deep-cavity automotive injection molded parts according to claim 1, characterized in that: A pushing arc plate (701) is provided inside the installation frame (5), and both sides of the interior of the installation frame (5) are fixedly connected to the limiting frame (703), and both sides of the pushing arc plate (701) are fixedly connected to fixed plates (702), and the fixed plates (702) extend into the limiting frame (703) and are slidably connected to the limiting frame (703). A vertical plate (704) is fixedly connected inside the installation frame (5), and a third spring (705) is fixedly connected between the vertical plate (704) and the pushing arc plate (701). A pull rope (707) is fixedly connected to the outside of the pulling block (503), and the outside of the vertical plate (704) is rotatably connected to a first guide wheel (706). The inner wall of the installation frame (5) is rotatably connected to a second guide wheel (708), and the pull rope (707) passes through the first guide wheel (706) and the second guide wheel (708) in sequence and is fixedly connected to the fixed plate (702) at one end passing through the limiting frame (703).

7. The injection mold for thin-walled deep-cavity automotive injection molded parts according to claim 1, characterized in that: The lower ejector rod (802) is connected to the connecting frame (801), and an air outlet groove (805) is provided on the outer side of the lower ejector rod (802). An air pump (804) is fixedly connected to the outer side of the fixing frame (1), and the air outlet end of the air pump (804) is fixedly connected to the connecting frame (801).

8. A rapid demoulding method for thin-walled, deep-cavity automotive injection molded parts, applicable to the injection mold for thin-walled, deep-cavity automotive injection molded parts according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: After injection molding, the upper mold (2) is driven to rise by starting the lifting member, and the upper mold (2) rises and pushes the mold to separate from the upper mold (2) through the upper push rod (401) at the bottom of the connecting plate (4); Step 2: When the upper mold (2) rises, the pouring portion of the pouring hole (201) is sheared by the shearing piece inside the mounting frame (5); Step 3: Start the connection frame (801) to rise, so that the lower ejector rod (802) fixedly connected to the top of the connection frame (801) ejects the model.

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