Injection mold of slide block core-pulling mechanism in small space realized by secondary mold opening

Abstract

The utility model relates to the technical field of demoulding of injection products, in particular to an injection mould of a slide block core-pulling mechanism in a small space, which is realized by secondary mould opening. The mold comprises a lower mold body, a movable mold plate is arranged on the upper side face of the lower mold body, an upper mold body is arranged on the upper side face of the movable mold plate, a locking mechanism is arranged on the upper mold body and used for fixedly connecting the movable mold plate with the upper mold body, and four pushing mechanisms are arranged at the positions, close to the four corners, of the lower mold body. According to the injection mold of the small-space inner sliding block core-pulling mechanism achieved through secondary mold opening, after the traction assembly sucks the end, away from the oil cylinder, of the inner drawing insert pin into the channel, the movable mold plate is pushed in the direction away from the lower mold through a rebounding spiral spring, and an inner sliding block mold core drives an ejector block to eject a product out of the interior of a forming cavity; by adopting the tripping mode, the tripping amount of the product is smaller than that of a pitched roof structure, the structural strength of the inner sliding block mold core and the ejector block is not easy to break compared with the pitched roof structure, and the stability is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection product demolding technical field, concretely relates to a small space inside slider core-pulling mechanism's injection mold realized by twice mould opening. BACKGROUND

[0002] A kind of injection product 5 is provided with reverse buckle, when product 5 is demolded, need to be demolded by oblique direction movement to the reverse buckle, to take out product 5 from mould, the angle of oblique ejector pin is greater, the height of ejection is smaller, the angle of oblique ejector pin is small, the height of ejection is higher, demolding stroke is related to the angle of oblique ejector pin or ejection height.

[0003] When using oblique ejector pin structure to eject product 5 from mould with smaller internal space, the angle of oblique ejector pin needs to be designed larger, the ejection distance of oblique ejector pin also needs to be designed higher, when the angle of oblique ejector pin is larger, there is greater force in vertical direction in ejection process, fracture risk can occur, when the ejection distance of oblique ejector pin is higher, it can increase the friction distance between oblique ejector pin and insert block or mould frame, and iron filings can be produced by long-term friction, so that oblique ejector pin is stuck and moves not smoothly, simultaneously, when product 5 needs to be demolded in oblique direction, the angle of oblique ejector pin seat needs to increase the angle identical with the demolding angle of product 5, instead of horizontal sliding, the movement direction of oblique ejector pin increases, stress point increases, so that it is more unstable, and more prone to fracture, in view of this, we propose a kind of small space inside slider core-pulling mechanism's injection mold realized by twice mould opening. UTILITARIAN CONTENT

[0004] The utility model aims at providing a kind of small space inside slider core-pulling mechanism's injection mold realized by twice mould opening, to solve the problems in the above background.

[0005] To achieve the above object, a kind of small space inside slider core-pulling mechanism's injection mold realized by twice mould opening is provided, including lower mould, the upper side of the lower mould is provided with movable die plate, the upper side of the movable die plate is provided with upper mould, the upper mould is provided with locking mechanism, the locking mechanism is used to fixedly connect movable die plate and upper mould, four push mechanisms are arranged on the lower mould close to the position of four corners;

[0006] The upper side of the movable die plate is symmetrically provided with two forming cavities, and two products are arranged in the two forming cavities respectively, and two ejection mechanisms are symmetrically arranged below the products, the ejection mechanism is used for pushing the product away from the lower die, and the ejection mechanism comprises a first guide block which is fixedly arranged on the upper side of the movable die plate, a vertical groove is symmetrically arranged on the movable die plate, the first guide block is slidably arranged in the vertical groove, the position of the first guide block on the side close to the top is provided as an inclined surface, an inner sliding block core is arranged on the side of the inclined surface of the first guide block, a top block is fixedly connected to the top end of the inner sliding block core, an installation cavity which is communicated with the vertical groove is arranged in the movable die plate, the inner sliding block core and the top block are arranged in the installation cavity, a core pressing plate is fixedly connected to the bottom surface in the installation cavity, the upper side of the core pressing plate is provided as an inclined surface, the lower side of the inner sliding block core is in sliding contact with the inclined surface of the core pressing plate, the installation cavity is communicated with the inside of the forming cavity, and the upper side of the top block is in contact with the product.

[0007] A movable core is fixedly arranged on the bottom surface in the forming cavity, two channels are symmetrically arranged in the movable core, an inner extraction insert is slidably arranged in the channel, and the channel and the inner extraction insert are both arranged in an inclined manner, a traction assembly is arranged at the end of the two inner extraction inserts away from the forming cavity, the traction assembly is used for driving the inner extraction insert to slide in the channel, a middle groove is arranged on the first guide block, a clamping hole is arranged on the inner sliding block core, when the lower surface of the movable die plate is in contact with the lower die, a corresponding group of clamping holes, middle grooves and channels are located on the same axis, the inner extraction insert is arranged in the clamping hole and the middle groove, and when the inner extraction insert is separated from the middle groove, the pushing mechanism pushes the movable die plate away from the lower die.

[0008] As a further improvement of the technical scheme, two demolding mechanisms are symmetrically arranged below the product, the demolding mechanism comprises a second guide block which is fixedly arranged on the upper surface of the lower die, a slant groove which is communicated with the forming cavity is arranged on the movable die plate, an outer sliding block core is slidably arranged in the slant groove, the upper side of the second guide block is provided as an inclined surface, and the lower side of the outer sliding block core is in sliding connection with the inclined surface of the second guide block.

[0009] As a further improvement of the technical scheme, when the lower surface of the movable die plate is in contact with the lower die, the end of the inner extraction insert away from the traction assembly extends into the inside of the forming cavity and is in contact with the product.

[0010] As a further improvement of the technical scheme, four inner embedding grooves are arranged at positions close to the four corners on the top of the lower die, the pushing mechanism comprises a helical spring which is fixedly connected to the bottom surface in the inner embedding groove, the upper end of the helical spring is in contact with the lower surface of the movable die plate, and when the inner extraction insert is separated from the middle groove, the helical spring pushes the movable die plate away from the lower die.

[0011] As a further improvement of the technical solution, the pushing mechanism further comprises a limiting screw fixedly connected to the lower surface of the movable mold plate, the limiting screw is arranged inside the spiral spring, the lower surface of the lower mold is symmetrically fixedly connected with two supporting plates, the inside of the supporting plates is provided with a movable slot at a position corresponding to the embedded groove, the limiting screw is composed of a rod body and a head fixed to the lower end of the rod body, the lower end of the rod body of the limiting screw penetrates through the lower side surface of the embedded groove and extends into the movable slot, and the head of the limiting screw is arranged in the movable slot.

[0012] As a further improvement of the technical solution, the traction assembly comprises an oil cylinder fixedly connected to one side of the movable mold plate, the other end of the piston rod of the oil cylinder is fixedly connected with an upper wear plate, the upper wear plate is slidingly arranged on the upper side surface of the movable mold plate, two first sliding grooves are symmetrically arranged on the side of the upper wear plate close to the forming cavity, and two embedding grooves are symmetrically arranged on the inner extraction needle.

[0013] As a further improvement of the technical solution, the inner sliding block core is of L-shaped structure, two sections of the inner sliding block core are in contact with the first guide block and the core pressing plate respectively, the section of the inner sliding block core in contact with the first guide block is arranged obliquely, a second sliding groove is arranged on the inclined surface of the inner sliding block core, the second sliding groove is arranged obliquely and has the same inclination as the inclined surface of the inner sliding block core, and a T-shaped block is fixedly connected to the inclined surface of the first guide block and slidingly arranged in the second sliding groove.

[0014] As a further improvement of the technical solution, the locking mechanism comprises four buckles hingedly arranged on the opposite sides of the upper mold, the buckle is of L-shaped structure, four clamping grooves are arranged on the movable mold plate at positions corresponding to the buckles, and when the end of the buckle away from the upper mold is inserted into the corresponding clamping groove, the buckle and the clamping groove cooperate to fix the movable mold plate on the lower side surface of the upper mold.

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] 1. The injection mold of the small-space inner sliding block core-pulling mechanism realized by twice mold opening, when the product is formed in the forming cavity, the large-stroke reverse buckle part on the product is arranged at the position in contact with the inner extraction needle, the inner extraction needle is pulled out from the inside of the forming cavity through the traction assembly, the inner extraction needle is separated from the product, the product can be taken out from the inside of the forming cavity, and there is no strength problem and stress problem of the inclined ejector pin and no ejection height problem.

[0017] 2. The injection mold of the small space slider core-pulling mechanism realized by secondary mold opening, when the traction assembly pulls the inner extraction insert pin into the inside of the channel from the end of the oil cylinder, the rebounding spiral spring pushes the movable mold plate in the direction away from the lower mold, the inner slider core drives the ejector to eject the product from the inside of the forming cavity, the product is ejected in this way, the ejection amount of the product is smaller than that of the inclined ejector structure, the structure strength of the inner slider core and the ejector is not easy to break compared with the inclined ejector, and the stability is stronger. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structure schematic view of the utility model;

[0019] Figure 2 It is the structure schematic view of the lower mold, movable mold plate and product combination of the utility model;

[0020] Figure 3 It is the sectional view of the lower mold, movable mold plate and product combination of the utility model;

[0021] Figure 4 It is the sectional structure schematic view of the lower mold and movable mold plate assembly of the utility model;

[0022] Figure 5 It is the sectional structure schematic view of the lower mold and movable mold plate assembly of the utility model;

[0023] Figure 6 It is the sectional structure schematic view of the lower mold and movable mold plate assembly of the utility model;

[0024] Figure 7 It is the combination structure schematic view of the inner slider core, first guide block, core pressing plate and outer slider core of the utility model;

[0025] Figure 8 It is the structure schematic view of the movable mold plate of the utility model;

[0026] Figure 9 It is the structure schematic view of the movable mold plate of the utility model;

[0027] Figure 10 It is the installation structure schematic view of the outer slider core and second guide block of the utility model;

[0028] Figure 11 It is the sectional view of the combination of the traction assembly, inner extraction insert pin, first guide block and inner slider core of the utility model;

[0029] Figure 12 It is the sectional view of the movable mold core of the utility model;

[0030] Figure 13The utility model discloses a structure schematic diagram of the combination of the inner sliding block core, core pressing plate and first guide block.

[0031] Figure 14 The utility model discloses the installation structure schematic diagram of the inner sliding block core and top block.

[0032] Figure 15 The utility model discloses the structure schematic diagram of the first guide block.

[0033] Figure 16 The utility model discloses the structure schematic diagram of the traction assembly.

[0034] Figure 17 The utility model discloses the sectional view of the traction assembly.

[0035] Figure 18 The utility model discloses the structure schematic diagram of the push mechanism of the lower mould and movable template assembly sectional view display.

[0036] Figure 19 The utility model discloses the movement schematic diagram of the inner extraction inlay needle.

[0037] Figure 20 The utility model discloses the movement schematic diagram of the first guide block and inner sliding block core after the top block jacking product.

[0038] The meaning of each mark in the drawing is as follows:

[0039] 1, lower mould;11, first guide block;111, middle groove;112, T-shaped block;12, second guide block;13, inlay groove;14, movable slot;

[0040] 2, movable template;21, inclined slot;22, vertical slot;23, core pressing plate;24, movable core;25, passageway;26, forming cavity.

[0041] 3, upper mould;31, buckle machine;

[0042] 4, inner sliding block core;41, clamping hole;42, second sliding slot;43, top block;

[0043] 5, product;

[0044] 6, inner extraction inlay needle;61, inlay groove;

[0045] 7, traction assembly;71, oil cylinder;72, upper wear plate;73, first sliding slot;

[0046] 8, outer sliding block core;

[0047] 9, push mechanism;91, limiting screw;92, helical spring. DETAILED DESCRIPTION

[0048] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0049] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0050] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0051] Embodiment 1

[0052] Please refer to Figures 1-20 As shown in the drawings, an injection mold of a small space slider core-pulling mechanism realized by secondary mold opening is provided, which comprises a lower mold 1, the upper side of the lower mold 1 is provided with a movable mold plate 2, the upper side of the movable mold plate 2 is provided with an upper mold 3, the lower mold 1, the movable mold plate 2 and the upper mold 3 are horizontally placed when in use, and in the drawings of the present scheme, the lower mold 1, the movable mold plate 2 and the upper mold 3 are all vertically placed, so as to facilitate the description of the structure.

[0053] The upper mold 3 is provided with a locking mechanism, the locking mechanism is used for fixedly connecting the movable mold plate 2 and the upper mold 3, and the structure of the locking mechanism will be refined below, please refer to Figure 1The locking mechanism comprises four buckles 31 hinged on opposite sides of the upper mold 3, the buckle 31 is of L-shaped structure, four clamping grooves are formed on the movable mold plate 2 at positions corresponding to the buckles 31, when the end of the buckle 31 away from the upper mold 3 is inserted into the corresponding clamping groove, the buckle 31 and the clamping groove cooperate to fix the movable mold plate 2 on the lower side of the upper mold 3, thereby fixing the position of the movable mold plate 2, the upper side of the movable mold plate 2 is symmetrically provided with two forming cavities 26, the forming cavities 26 are arranged below the upper mold 3, the upper mold 3 is provided with flow channels in communication with the interiors of the forming cavities 26, after the molten injection material is injected into the interiors of the two forming cavities 26 through the flow channels, the injection material is cooled and solidified into products 5 in the interiors of the forming cavities 26, so that two products 5 are arranged in the two forming cavities 26 respectively, the buckle 31 tightly fixes the movable mold plate 2 on the lower side of the upper mold 3, preventing the injection material in the forming cavities 26 from extruding a gap between the movable mold plate 2 and the upper mold 3 and leaking out through the gap, thereby improving the injection quality of the injection mold.

[0054] Two ejection mechanisms are symmetrically arranged below the products 5, the structure of the ejection mechanism is refined as follows, referring to Figures 5-9, the ejection mechanism includes the first guide block 11 which is symmetrically fixed on the upper side of the movable mold plate 2, the vertical slot 22 which is symmetrically arranged on the movable mold plate 2, the first guide block 11 which is slidably arranged in the vertical slot 22, the inclined surface which is arranged on one side of the first guide block 11 close to the top end, the inner slide block core 4 which is arranged on one side of the inclined surface of the first guide block 11, the top block 43 which is fixedly connected to the top end of the inner slide block core 4, the installation cavity which is arranged in the movable mold plate 2 and communicated with the vertical slot 22, the inner slide block core 4 and the top block 43 which are arranged in the installation cavity, the installation cavity which is communicated with the inside of the forming cavity 26, the upper side of the top block 43 which extends to the inside of the forming cavity 26, and the two demolding mechanisms which are symmetrically arranged below the product 5, the second guide block 12 which is fixedly arranged on the upper surface of the lower mold 1, the inclined slot 21 which is arranged on the movable mold plate 2 and communicated with the forming cavity 26, the outer slide block core 8 which is slidably arranged in the inside of the inclined slot 21, the inclined surface which is arranged on the upper side of the second guide block 12, the lower side of the outer slide block core 8 which is slidably connected with the inclined surface of the second guide block 12, the upper end of the outer slide block core 8 which extends to the inside of the forming cavity 26 when the lower surface of the movable mold plate 2 contacts the lower mold 1, the movable mold core 24 which is fixedly arranged on the bottom surface in the inside of the forming cavity 26, the two channels 25 which are symmetrically arranged in the inside of the movable mold core 24, the inner extraction insert pin 6 which is slidably arranged in the inside of the channel 25, the first guide block 11 which is arranged in the middle slot 111, the clamping hole 41 which is arranged on the inner slide block core 4, the corresponding group of clamping holes 41, middle slots 111 and channels 25 which are located on the same axis when the lower surface of the movable mold plate 2 contacts the lower mold 1, the inner extraction insert pin 6 which is arranged in the clamping hole 41 and the middle slot 111, the end of the inner extraction insert pin 6 which extends into the inside of the forming cavity 26 and contacts the product 5 when the inner extraction insert pin 6 is arranged in the clamping hole 41 and the middle slot 111, the shape of the lower side of the product 5 which is obtained after the injection molding material contacts the movable mold core 24, the top block 43, the outer slide block core 8 and the inner extraction insert pin 6 and solidifies and forms, the product 5 which keeps contacting the top block 43, the outer slide block core 8 and the inner extraction insert pin 6 after being formed, and the position where the product 5 contacts the inner extraction insert pin 6 forms the preset reverse buckle.

[0055] When the inner extraction insert pin 6 is arranged in the clamping hole 41 and the middle slot 111, the inner extraction insert pin 6 locks the positions of the first guide block 11 and the inner slide block core 4, so that the movable mold plate 2 is stably placed on the upper side of the lower mold 1, the stability of the forming cavity 26 in the injection molding process is improved, and the injection molding quality of the mold is improved.

[0056] The lower mold 1 is fixedly arranged on the external moving platform, and the upper mold 3 is hung on one side of the lower mold 1 through the external support. When the product 5 is completely cooled and solidified in the forming cavity 26, one end of the buckling mechanism 31 is turned out from the inside of the clamping groove to release the fixation of the buckling mechanism 31 on the movable die plate 2, so that the movable die plate 2 and the upper mold 3 can be separated. Then the moving platform drives the lower mold 1 and the movable die plate 2 to move away from the upper mold 3, and the upper mold 3 is fixedly arranged, so that the upper mold 3 and the movable die plate 2 are separated. The forming cavity 26 is exposed to the external environment, so that the machine can eject the product 5 from the forming cavity 26.

[0057] In order to extract the inner extraction insert 6 from the inside of the forming cavity 26, separate the inner extraction insert 6 from the product 5, and then take out the product 5 from the inside of the forming cavity 26, a traction assembly 7 is arranged at the end of the two inner extraction inserts 6 away from the forming cavity 26. The traction assembly 7 is used to drive the inner extraction insert 6 to slide in the channel 25. The structure of the traction assembly 7 will be refined below, and reference is made to Figure 16 and Figure 17 The traction assembly 7 includes an oil cylinder 71 fixedly connected to one side of the movable die plate 2. The other end of the piston rod of the oil cylinder 71 is fixedly connected with an upper wear plate 72. The upper wear plate 72 is slidingly arranged on the upper side of the movable die plate 2. Two first sliding grooves 73 are symmetrically arranged on the side of the upper wear plate 72 close to the forming cavity 26. Two embedding grooves 61 are symmetrically arranged on the inner extraction insert 6. The two embedding grooves 61 on the inner extraction insert 6 are embedded in the corresponding first sliding grooves 73, and the end of the inner extraction insert 6 away from the forming cavity 26 is slidingly arranged in the first sliding groove 73. By contracting the piston rod of the oil cylinder 71 to drive the upper wear plate 72 to move away from the forming cavity 26, the moving upper wear plate 72 drives the inner extraction insert 6 to move close to the oil cylinder 71 through the first sliding groove 73, so that the inner extraction insert 6 slides along the inside of the channel 25. At this time, the embedding grooves 61 on the inner extraction insert 6 slide along the inner wall of the first sliding groove 73, so that the upper wear plate 72 extracts one end of the inner extraction insert 6 from the inside of the forming cavity 26, separates the inner extraction insert 6 from the product 5, and then the end of the inner extraction insert 6 away from the oil cylinder 71 enters the inside of the channel 25 through the clamping hole 41 and the middle groove 111, releases the restriction of the inner extraction insert 6 on the position of the inner sliding block core 4 and the first guide block 11, and completes the first mold opening of the product 5. The demolding mode of the inner extraction insert 6 can set the large-stroke reverse buckling part of the product 5 at the position in contact with the inner extraction insert 6, and there is no strength problem and stress problem of the inclined ejector pin, and the ejection height problem. The inner extraction insert 6 is not easy to break relative to the inclined ejector pin, and has higher stability.

[0058] In order to separate the product 5 from the outer sliding block core 8 and the inner wall of the forming cavity 26, four pushing mechanisms 9 are arranged on the lower mold 1 close to the four corners. When the forming cavity 26 is exposed to the external environment, and the inner extraction insert 6 moves away from the middle groove 111, the pushing mechanism 9 pushes the movable die plate 2 away from the lower mold 1. The structure of the pushing mechanism 9 will be refined below, and reference is made toFigure 7 、 Figure 10 and Figure 18 , the lower mold 1 top near the four corners of the position set up four embedded groove 13, push mechanism 9 includes fixedly connected in the embedded groove 13 inside the bottom of the spiral spring 92, the upper end of the spiral spring 92 and the lower surface of the movable die plate 2 contact, when the inner extraction needle 6 is set in the card hole 41 and the middle slot 111, the inner extraction needle 6 locks the position of the first guide block 11 and the inner slide block core 4, the lower surface of the movable die plate 2 is in close contact with the lower mold 1, at this time the spiral spring 92 is in the state of elastic compression, after the inner extraction needle 6 is separated from the card hole 41 and the middle slot 111, the inner extraction needle 6 releases the restriction of the position of the first guide block 11 and the inner slide block core 4, the spiral spring 92 rebounds and pushes the movable die plate 2 to move vertically upward, at the same time, the lower surface of the movable die plate 2 is fixedly connected with the limiting screw 91, the limiting screw 91 is arranged inside the spiral spring 92, the lower surface of the lower mold 1 is fixedly connected with two support plates, the inside of the support plate is provided with a movable slot 14 at the position corresponding to the embedded groove 13, the limiting screw 91 is composed of a rod body and a head fixedly connected to the lower end of the rod body, the lower end of the rod body of the limiting screw 91 penetrates through the lower side of the embedded groove 13 and extends into the movable slot 14, the limiting screw 91 limits the movable die plate 2 to move vertically only, the head of the limiting screw 91 is arranged in the movable slot 14, when the movable die plate 2 moves vertically upward, the movable die plate 2 drives the limiting screw 91 to move upward synchronously, when the head of the limiting screw 91 contacts with the top surface inside the movable slot 14, the spiral spring 92 cannot push the movable die plate 2 to move upward continuously, so as to limit the maximum height of the movable die plate 2.

[0059] Since the first guide block 11 and the second guide block 12 are fixedly arranged on the upper side of the lower mold 1, when the movable die plate 2 moves away from the lower mold 1, the first guide block 11 and the second guide block 12 move downward relative to the movable die plate 2, at this time, in order to make the ejection mechanism push the product 5 away from the lower mold 1, the core pressing plate 23 is fixedly connected to the bottom surface inside the installation cavity, the upper side of the core pressing plate 23 is arranged as an inclined surface, the lower side of the inner slide block core 4 is in sliding contact with the inclined surface of the core pressing plate 23, the inner slide block core 4 is L-shaped structure, the inner slide block core 4 is divided into two sections at the L-shaped corner as a separation point, the two sections of the inner slide block core 4 are respectively in contact with the first guide block 11 and the core pressing plate 23, the section of the inner slide block core 4 in contact with the first guide block 11 is arranged obliquely, and the inclined surface of the inner slide block core 4 is provided with a second sliding groove 42, the second sliding groove 42 is arranged obliquely and has the same inclination as the inclined surface of the inner slide block core 4, the inclined surface of the first guide block 11 is fixedly connected with a T-shaped block 112, the T-shaped block 112 is slidingly arranged in the second sliding groove 42, for Figure 18 and Figure 20When the movable die plate 2 moves upward, the movable die plate 2 pushes the inner sliding block core 4 to slide upward along the inclined surface of the inner core pressing plate 23 and the first guide block 11 through the sliding connection of the inclined surface of the first guide block 11 and the inner sliding block core 4 and the sliding connection of the inner sliding block core 4 and the inclined surface of the core pressing plate 23. The upward moving inner sliding block core 4 drives the ejector rod 43 to move synchronously, and the ejector rod 43 pushes the product 5 away from the lower die 1. At the same time, the second guide block 12 drives the outer sliding block core 8 to slide downward along the inner wall of the inclined groove 21. The relative sliding between the lower side of the moving second guide block 12 and the inclined surface of the second guide block 12 accelerates the separation of the outer sliding block core 8 and the product 5, separates the product 5 from the inner wall of the forming cavity 26, and completes the secondary mold opening of the product 5. The product 5 is ejected from the inside of the forming cavity 26 by the inner sliding block core 4 and the ejector rod 43, so that the ejection amount of the product 5 is relatively small relative to the inclined ejection structure, and the stability of the ejection of the product 5 is relatively strong.

[0060] In order to ensure that the movable die plate 2 and the upper die 3 do not deviate in position when the movable die plate 2 and the upper die 3 are closed, guide sleeves are arranged at the four corners of the movable die plate 2 close to the upper die 3. When the movable die plate 2 and the upper die 3 are close to each other and closed, the guide sleeves guide the upper die 3, ensuring accurate closing of the movable die plate 2 and the upper die 3.

[0061] When the injection mold is used, the lower die 1, the movable die plate 2 and the upper die 3 are all placed horizontally. After the molten injection material is solidified in the forming cavity 26 to obtain the product 5, the machine releases the fixing of the movable die plate 2 by the ejection mechanism 31, and then uses the moving platform to drive the lower die 1 and the movable die plate 2 away from the upper die 3, so that the upper die 3 is separated from the movable die plate 2, and the forming cavity 26 and the product 5 inside it are exposed to the external environment. The inner extraction pin 6 is separated from the clamping hole 41 and the middle groove 111 by starting the oil cylinder 71, so that the inner extraction pin 6 is extracted from the undercut part on the product 5, completing the primary mold opening of the product 5. At this time, the movable die plate 2 is pushed away from the lower die 1 by the rebound of the spiral spring 92, so that the first guide block 11 and the second guide block 12 move relative to the movable die plate 2 to approach the lower die 1. The second guide block 12 drives the outer sliding block core 8 to separate from the product 5, and the first guide block 11 drives the inner sliding block core 4 and the ejector rod 43 to move upward, so that the ejector rod 43 ejects the product 5 from the forming cavity 26, completing the secondary mold opening of the product 5. The product 5 is ejected by this way, so that the ejection amount of the product 5 is relatively small relative to the inclined ejection structure, and the structural strength of the inner sliding block core 4 and the ejector rod 43 is not easy to break relative to the inclined ejection structure, and the stability is stronger. The product 5 ejected from the forming cavity 26 by the ejector rod 43 falls under the action of gravity, so as to realize the automatic discharge of the product 5.

[0062] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An injection mold of a small space slide core mechanism realized by two- part mold, comprising a lower mold (1), characterized in that: The upper side of the lower mold (1) is provided with a movable mold plate (2), the upper side of the movable mold plate (2) is provided with an upper mold (3), the upper mold (3) is provided with a locking mechanism for fixedly connecting the movable mold plate (2) and the upper mold (3), and the lower mold (1) is provided with four pushing mechanisms (9) near the four corners. The upper side of the movable mold plate (2) is symmetrically provided with two forming cavities (26), two products (5) are arranged in the two forming cavities (26) respectively, and two ejection mechanisms are symmetrically arranged below the products (5) and used for pushing the products (5) away from the lower mold (1), the ejection mechanism comprises a first guide block (11) which is fixedly arranged on the upper side of the movable mold plate (2) in a symmetrical mode, the movable mold plate (2) is symmetrically provided with a vertical groove (22), the first guide block (11) is slidably arranged in the vertical groove (22), one side of the first guide block (11) is provided with an inclined surface near the top end, one side of the inclined surface of the first guide block (11) is provided with an inner sliding block core (4), the inner sliding block core (4) is fixedly connected with a top block (43) at the top end, the movable mold plate (2) is internally provided with an installation cavity which is in communication with the vertical groove (22), the inner sliding block core (4) and the top block (43) are arranged in the installation cavity, the bottom surface in the installation cavity is fixedly connected with a core pressing plate (23), the upper side of the core pressing plate (23) is provided with an inclined surface, the lower side of the inner sliding block core (4) is in sliding contact with the inclined surface of the core pressing plate (23), the installation cavity is in communication with the inside of the forming cavity (26), and the upper side of the top block (43) is in contact with the product (5). The bottom surface in the forming cavity (26) is fixedly provided with a movable mold core (24), the inside of the movable mold core (24) is symmetrically provided with two channels (25), the inside of the channel (25) is slidably provided with an inner extraction insert needle (6), the channel (25) and the inner extraction insert needle (6) are both arranged in an inclined mode, one end of the two inner extraction insert needles (6) away from the forming cavity (26) is provided with a traction assembly (7), the traction assembly (7) is used for driving the inner extraction insert needle (6) to slide in the channel (25), the first guide block (11) is provided with an intermediate groove (111), the inner sliding block core (4) is provided with a clamping hole (41), when the lower surface of the movable mold plate (2) is in contact with the lower mold (1), a corresponding set of the clamping hole (41), the intermediate groove (111) and the channel (25) are located on the same axis, the inner extraction insert needle (6) is arranged in the clamping hole (41) and the intermediate groove (111), when the inner extraction insert needle (6) is away from the intermediate groove (111), the pushing mechanism (9) pushes the movable mold plate (2) away from the lower mold (1).

2. The injection mold of the small space slide core pulling mechanism realized by two-time mold opening according to claim 1, characterized in that: The lower part of the product (5) is symmetrically provided with two demolding mechanisms, the demolding mechanism comprises a second guide block (12) fixedly arranged on the upper surface of the lower mold (1), the movable mold plate (2) is provided with a chute (21) communicated with the forming cavity (26), the inside of the chute (21) is slidably provided with an outer sliding block core (8), the upper side of the second guide block (12) is provided as an inclined surface, the lower side of the outer sliding block core (8) is slidably connected with the inclined surface of the second guide block (12), when the lower surface of the movable mold plate (2) is in contact with the lower mold (1), the upper end of the outer sliding block core (8) is in contact with the bottom of the product (5).

3. The injection mold of the small space slide core mechanism realized by two-time mold opening according to claim 1, characterized in that: When the lower surface of the movable mold plate (2) is in contact with the lower mold (1), the end of the inner extraction insert pin (6) away from the traction assembly (7) extends into the inside of the forming cavity (26) and is in contact with the product (5).

4. The injection mold of the small space slide core mechanism realized by two- stage mold opening according to claim 1, characterized in that: The lower mold (1) is provided with four embedded grooves (13) near the four corners at the top, the pushing mechanism (9) comprises a helical spring (92) fixedly connected to the bottom surface inside the embedded groove (13), the upper end of the helical spring (92) is in contact with the lower surface of the movable mold plate (2), when the inner extraction insert pin (6) is separated from the middle groove (111), the helical spring (92) pushes the movable mold plate (2) away from the lower mold (1).

5. The injection mold of the small space slide core mechanism realized by two- stage mold opening according to claim 4, characterized in that: The pushing mechanism (9) further comprises a limiting screw (91) fixedly connected to the lower surface of the movable mold plate (2), the limiting screw (91) is arranged inside the helical spring (92), the lower surface of the lower mold (1) is symmetrically fixedly connected with two supporting plates, the inside of the supporting plate is provided with a movable groove (14) at the position corresponding to the embedded groove (13), the limiting screw (91) is composed of a rod body and a head fixedly arranged at the lower end of the rod body, the lower end of the rod body of the limiting screw (91) penetrates through the lower side of the embedded groove (13) and extends into the movable groove (14), the head of the limiting screw (91) is arranged in the movable groove (14).

6. The injection mold of the small space slide core mechanism realized by two- stage mold opening according to claim 1, characterized in that: The traction assembly (7) comprises an oil cylinder (71) fixedly connected to one side of the movable mold plate (2), the other end of the piston rod of the oil cylinder (71) is fixedly connected with an upper wear plate (72), the upper wear plate (72) is slidably arranged on the upper side of the movable mold plate (2), the upper wear plate (72) is symmetrically provided with two first sliding grooves (73) on the side close to the forming cavity (26), the inner extraction insert pin (6) is symmetrically provided with two embedded grooves (61), the two embedded grooves (61) on the inner extraction insert pin (6) are embedded in the corresponding first sliding grooves (73).

7. The injection mold of the small space slide core mechanism realized by two- stage mold opening according to claim 1, characterized in that: The inner sliding block core (4) is L-shaped structure, the two sections of the inner sliding block core (4) are respectively in contact with the first guide block (11) and the core pressing plate (23), the section of the inner sliding block core (4) in contact with the first guide block (11) is obliquely arranged, and the inclined surface of the inner sliding block core (4) is provided with a second sliding groove (42), the second sliding groove (42) is obliquely arranged and has the same inclination as the inclination of the inclined surface of the inner sliding block core (4), the inclined surface of the first guide block (11) is fixedly connected with a T-shaped block (112), the T-shaped block (112) is slidably arranged in the inside of the second sliding groove (42).

8. The injection mold of the small space slide core mechanism realized by two- stage mold opening according to claim 1, characterized in that: The locking mechanism comprises four buckles (31) hinged on opposite sides of the upper die (3), the buckle (31) is of L-shaped structure, four clamping grooves are formed on the movable die plate (2) at positions corresponding to the buckles (31), when the end of the buckle (31) away from the upper die (3) is inserted into the corresponding clamping groove, the buckle (31) and the clamping groove cooperate to fix the movable die plate (2) on the lower side of the upper die (3).

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