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

Abstract

The invention relates to the technical field of demolding of injection products, in particular to an injection mold of a sliding block core-pulling mechanism in a small space, which is realized by secondary mold 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 invention relates to the technical field of demoulding of injection molded products, in particular to an injection mold with a slider core pulling mechanism in a small space realized by secondary mold opening. Background Art

[0002] An injection molded product 5 is provided with an undercut. When demolding the product 5, it is necessary to remove the undercut by moving in an oblique direction so as to take the product 5 out of the mold. For the same amount of undercut, the larger the angle of the inclined top, the smaller the ejection height, and the smaller the angle of the inclined top, the higher the ejection height. The demolding stroke is related to the angle of the inclined top or the ejection height.

[0003] When using the inclined top structure to eject product 5 from a mold with a small internal space, the angle of the inclined top needs to be designed to be larger, and the ejection distance of the inclined top also needs to be designed to be higher. When the angle of the inclined top is larger, the greater the vertical force on the inclined top during the ejection process, the risk of breakage will occur. When the ejection distance of the inclined top is higher, the friction distance between the inclined top and the insert or mold frame will increase. Over time, friction iron filings will be generated, causing the inclined top to get stuck and move unsmoothly. At the same time, when product 5 needs to be demolded in an oblique direction, the angle of the inclined top seat needs to be increased to the same angle as the demolding angle of product 5, rather than sliding horizontally. The more directions of movement of the inclined top, the more force points will be applied, making it more unstable and more prone to breakage. In view of this, we propose an injection mold for a slider core pulling mechanism in a small space that is achieved by secondary mold opening. Summary of the invention

[0004] The object of the present invention is to provide an injection mold with a slider core-pulling mechanism in a small space realized by secondary mold opening, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, an injection mold of a slider core pulling mechanism in a small space realized by secondary mold opening is provided, comprising a lower mold, a movable mold plate is arranged on the upper side of the lower mold, an upper mold is arranged on the upper side of the movable mold plate, a locking mechanism is arranged on the upper mold, and the locking mechanism is used to fix the movable mold plate and the upper mold, and four pushing mechanisms are arranged near the four corners of the lower mold;

[0006] The upper side surface of the movable template is symmetrically provided with two molding cavities, two products are respectively arranged in the two molding cavities, and two ejection mechanisms are symmetrically arranged below the products, and the ejection mechanisms are used to push the products in the direction away from the lower mold, and the ejection mechanisms include a first guide block symmetrically fixedly arranged on the upper side surface of the movable template, and a vertical groove is symmetrically arranged on the movable template, and the first guide block is slidably arranged in the vertical groove, and a position close to the top of one side of the first guide block is set as an inclined surface, and an inner slider core is arranged on one side of the inclined surface of the first guide block, and a top block is fixedly connected to the top of the inner slider core, and an installation cavity connected to the vertical groove is opened inside the movable template, and the inner slider core and the top block are arranged in the installation cavity, and a core pressing plate is fixedly connected to the bottom surface inside the installation cavity, and the upper side surface of the core pressing plate is set as an inclined surface, and the lower side surface of the inner slider core is in sliding contact with the inclined surface of the core pressing plate, and the installation cavity is connected to the interior of the molding cavity, and the upper side surface of the top block is in contact with the product;

[0007] A dynamic model core is fixedly arranged on the bottom surface inside the molding cavity, and two channels are symmetrically provided inside the dynamic model core. An inner pull-out pin is slidably arranged inside the channel. The channel and the inner pull-out pin are both inclined. A traction assembly is arranged at the end of the two inner pull-out pins away from the molding cavity, and the traction assembly is used to drive the inner pull-out pins to slide in the channel. An intermediate groove is arranged on the first guide block, and a clamping hole is arranged on the inner slider core. When the lower surface of the dynamic template contacts the lower mold, a corresponding group of clamping holes, the intermediate groove and the channel are located on the same axis, and the inner pull-out pin is arranged in the clamping hole and the intermediate groove. When the inner pull-out pin leaves the intermediate groove, the pushing mechanism pushes the dynamic template in a direction away from the lower mold.

[0008] As a further improvement of the present technical solution, two demolding mechanisms are symmetrically arranged below the product, the demolding mechanism includes a second guide block fixedly arranged on the upper surface of the lower mold, the movable mold plate is provided with an inclined groove connected to the molding cavity, an outer slider core is slidably arranged inside the inclined groove, the upper side surface of the second guide block is set as an inclined surface, the lower side surface of the outer slider core is slidably connected to the inclined surface of the second guide block, and when the lower surface of the movable mold plate contacts the lower mold, the upper end of the outer slider core contacts the bottom of the product.

[0009] As a further improvement of the technical solution, when the lower surface of the movable template contacts the lower mold, the end of the inner drawing pin away from the pulling assembly extends into the interior of the molding cavity and contacts the product.

[0010] As a further improvement of the present technical solution, four embedded grooves are provided at the top of the lower mold near the four corners, and the pushing mechanism includes a coil spring fixedly connected to the inner bottom surface of the embedded groove, and the upper end of the coil spring contacts the lower surface of the movable template, and when the inner pull-out pin leaves the middle groove, the coil spring pushes the movable template away from the lower mold.

[0011] As a further improvement of the present technical solution, the pushing mechanism also includes a limit screw fixedly connected to the lower surface of the movable template, the limit screw is arranged inside the coil spring, and the lower surface of the lower mold is symmetrically fixedly connected to two support plates, and a movable groove is opened inside the support plate at a position corresponding to the embedded groove. The limit screw consists of a rod body and a head fixed at the lower end of the rod body, the lower end of the limit screw rod body passes through the lower side surface of the embedded groove and extends into the movable groove, and the head of the limit screw is arranged in the movable groove.

[0012] As a further improvement of the present technical solution, the traction assembly includes a cylinder fixedly connected to one side of the movable template, the other end of the cylinder piston rod is fixedly connected to an upper wear-resistant plate, the upper wear-resistant plate is slidably arranged on the upper side of the movable template, and two first sliding grooves are symmetrically provided on one side of the upper wear-resistant plate close to the molding cavity, and two embedding grooves are symmetrically provided on the inner pull-out pin, and the two embedding grooves on the inner pull-out pin are embedded in the corresponding first sliding grooves.

[0013] As a further improvement of the present technical solution, the inner slider core is an L-shaped structure, and the two sections of the inner slider core are respectively in contact with the first guide block and the core pressure plate, the section of the inner slider core in contact with the first guide block is inclined, and a second slide groove is provided on the inclined surface of the inner slider core, the second slide groove is inclined and has the same inclination as the inclined surface of the inner slider core, a T-block is fixedly connected to the inclined surface of the first guide block, and the T-block is slidably arranged inside the second slide groove.

[0014] As a further improvement of the present technical solution, the locking mechanism includes four latch machines hinged on opposite sides of the upper mold, the latch machines are L-shaped structures, and four slots are provided on the movable template at positions corresponding to the latch machines. When the end of the latch machines away from the upper mold is inserted into the corresponding slots, the latch machines and the slots cooperate to fix the movable template on the lower side of the upper mold.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the injection mold with a small-space inner slider core-pulling mechanism realized by secondary mold opening, after the product is molded inside the molding cavity, the undercut part with a larger upper stroke of the product is arranged at a position in contact with the inner pull-out pin, and the inner pull-out pin is pulled out of the molding cavity through the traction component to separate the inner pull-out pin from the product, so that the product can be taken out from the molding cavity, and there are no strength problems and force problems on the inclined ejector, as well as ejection height problems.

[0017] 2. In the injection mold of the small space inner slider core pulling mechanism realized by secondary mold opening, when the traction component draws the inner pulling pin away from the end of the oil cylinder into the interior of the channel, the rebound spiral spring pushes the movable template away from the lower mold, so that the inner slider core drives the ejector block to eject the product from the inside of the molding cavity. The release method makes the product's release amount smaller than that of the inclined top structure. The structural strength of the inner slider core and the ejector block is not easy to break compared with the inclined top, and the stability is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the lower mold, the movable mold plate and the product after being assembled in the present invention;

[0020] Figure 3 It is a cross-sectional view of the lower mold, the movable mold plate and the product after being assembled according to the present invention;

[0021] Figure 4 It is one of the cross-sectional structural schematic diagrams of the assembly of the lower mold and the movable mold plate of the present invention;

[0022] Figure 5 The second schematic cross-sectional structure diagram of the assembly of the lower mold and the movable mold plate of the present invention;

[0023] Figure 6 The third schematic diagram of the cross-sectional structure of the assembly of the lower mold and the movable mold plate of the present invention;

[0024] Figure 7 It is a schematic diagram of the combined structure of the inner slider core, the first guide block, the core pressure plate and the outer slider core of the present invention;

[0025] Figure 8 It is one of the structural schematic diagrams of the movable template of the present invention;

[0026] Fig. 9 This is the second structural schematic diagram of the movable template of the present invention;

[0027] Fig.10 It is a schematic diagram of the installation structure of the outer slider core and the second guide block of the present invention;

[0028] Fig.11 It is a cross-sectional view of the combination of the pulling assembly, the inner drawing needle, the first guide block and the inner slider core of the present invention;

[0029] Fig.12 A cross-sectional view of the dynamic model core of the present invention;

[0030] Fig.13 It is a structural schematic diagram of the inner slider core, the core pressure plate and the first guide block combination of the present invention;

[0031] Fig.14 It is a schematic diagram of the installation structure of the inner slider core and the top block of the present invention;

[0032] Fig.15 It is a structural schematic diagram of the first guide block of the present invention;

[0033] Fig.16 It is a structural schematic diagram of the traction assembly of the present invention;

[0034] Fig.17 is a cross-sectional view of a traction assembly of the present invention;

[0035] Fig.18 It is a structural schematic diagram of the lower mold and the movable mold assembly section showing the pushing mechanism of the present invention;

[0036] Fig.19 It is a motion schematic diagram of the inner-drawing setting needle of the present invention;

[0037] Fig. 20 It is a schematic diagram of the movement of the first guide block and the inner slider core after the top block of the present invention lifts the product.

[0038] The meaning of each number in the figure is:

[0039] 1. Lower mold; 11. First guide block; 111. Middle groove; 112. T-block; 12. Second guide block; 13. Embedded groove; 14. Movable groove;

[0040] 2. Moving template; 21. Inclined groove; 22. Vertical groove; 23. Core pressing plate; 24. Moving mold core; 25. Channel; 26. Molding cavity.

[0041] 3. Upper mold; 31. Button machine;

[0042] 4. Inner slider core; 41. Clamp hole; 42. Second slide groove; 43. Top block;

[0043] 5. Products;

[0044] 6. Inner draw pin; 61. Fitting groove;

[0045] 7. Traction assembly; 71. Oil cylinder; 72. Upper wear plate; 73. First chute;

[0046] 8. External slider core;

[0047] 9. Pushing mechanism; 91. Limit screw; 92. Coil spring. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0051] Example 1

[0052] See also Figure 1-Figure 20 As shown, an injection mold with a slider core pulling mechanism in a small space realized by secondary mold opening is provided, including a lower mold 1, a movable mold plate 2 is arranged on the upper side of the lower mold 1, and an upper mold 3 is arranged on the upper side of the movable mold plate 2. The lower mold 1, the movable mold plate 2 and the upper mold 3 are placed horizontally when in use. In the attached drawings of this scheme, the lower mold 1, the movable mold plate 2 and the upper mold 3 are placed vertically to facilitate the description of the structure.

[0053] The upper mold 3 is provided with a locking mechanism, which is used to fix the movable mold plate 2 and the upper mold 3. The structure of the locking mechanism is detailed below. Figure 1The locking mechanism includes four latches 31 hinged on opposite sides of the upper mold 3. The latches 31 are of an L-shaped structure. Four slots are provided on the movable mold plate 2 at positions corresponding to the latches 31. When the latches 31 are inserted into the corresponding slots at one end away from the upper mold 3, the latches 31 cooperate with the slots to fix the movable mold plate 2 on the lower side surface of the upper mold 3, so as to fix the position of the movable mold plate 2. Two molding cavities 26 are symmetrically provided on the upper side surface of the movable mold plate 2. The molding cavities 26 are arranged below the upper mold 3. A flow channel connected to the interior of the molding cavities 26 is provided on the upper mold 3. After the molten injection material is injected into the interior of the two molding cavities 26 through the flow channel, the injection material is cooled and solidified in the interior of the molding cavity 26 to form a product 5, so that the two products 5 are respectively arranged in the two molding cavities 26. The latches 31 tightly fix the movable mold plate 2 on the lower side surface of the upper mold 3 to prevent the injection material in the molding cavity 26 from spreading out 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 product 5. The structure of the ejection mechanism is detailed below. Figure 5-Figure 9The ejection mechanism includes a first guide block 11 symmetrically fixedly arranged on the upper side of the movable template 2, a vertical groove 22 is symmetrically opened on the movable template 2, the first guide block 11 is slidably set in the vertical groove 22, a position near the top of one side of the first guide block 11 is set as an inclined surface, an inner slider core 4 is set on one side of the inclined surface of the first guide block 11, and a top block 43 is fixedly connected to the top of the inner slider core 4. An installation cavity connected to the vertical groove 22 is opened inside the movable template 2, the inner slider core 4 and the top block 43 are set in the installation cavity, and the installation cavity is connected to the molding cavity 26 is connected to the inside of the molding cavity 26, the upper side of the top block 43 extends to the inside of the molding cavity 26, and two demoulding mechanisms are symmetrically arranged below the product 5. The demoulding mechanism includes a second guide block 12 fixedly arranged on the upper surface of the lower mold 1, and an inclined groove 21 connected to the molding cavity 26 is opened on the movable template 2. The outer slider core 8 is slidably arranged inside the inclined groove 21. The upper side of the second guide block 12 is set as an inclined surface, and the lower side of the outer slider core 8 is slidably connected to the inclined surface of the second guide block 12. When the lower surface of the movable template 2 is connected to the lower mold When the mold 1 is in contact, the upper end of the outer slider core 8 extends to the inside of the molding cavity 26, and a movable mold core 24 is fixedly arranged on the bottom surface of the molding cavity 26, and two channels 25 are symmetrically arranged inside the movable mold core 24, and an inner draw-out needle 6 is slidably arranged inside the channel 25, and the channel 25 and the inner draw-out needle 6 are both inclined, and an intermediate groove 111 is arranged on the first guide block 11, and a clamping hole 41 is arranged on the inner slider core 4. When the lower surface of the movable template 2 contacts the lower mold 1, a corresponding set of clamping holes 41, the intermediate groove 111, and the inner slider core 4 are provided. 11 and the channel 25 are located on the same axis, the inner pull-out pin 6 is arranged in the clamping hole 41 and the middle groove 111, and the end of the inner pull-out pin 6 away from the traction component 7 extends into the interior of the molding cavity 26 and contacts with the product 5. When the injection molding material contacts the dynamic model core 24, the top block 43, the outer slider core 8 and the inner pull-out pin 6 and solidifies, the shape of the lower side of the product 5 can be obtained. The molded product 5 keeps in contact with the top block 43, the outer slider core 8 and the inner pull-out pin 6, and the position where the product 5 contacts the inner pull-out pin 6 forms a preset undercut.

[0055] When the inner pull-out pin 6 is set in the clamping hole 41 and the middle groove 111, the inner pull-out pin 6 locks the position of the first guide block 11 and the inner slider core 4, so that the movable template 2 is firmly placed on the upper side of the lower mold 1, thereby improving the stability of the molding cavity 26 during the injection molding process and improving the injection molding quality of the mold.

[0056] The lower mold 1 is fixedly arranged on an external mobile platform, and the upper mold 3 is suspended on one side of the lower mold 1 by an external bracket. When the product 5 is completely cooled and solidified inside the molding cavity 26, one end of the latch 31 is rotated out from the inside of the card slot to release the latch 31 from fixing the movable template 2, so that the movable template 2 and the upper mold 3 can be separated, and then the mobile platform drives the lower mold 1 and the movable template 2 away from the upper mold 3, and the upper mold 3 is fixed, so that the upper mold 3 and the movable template 2 are separated, exposing the molding cavity 26 to the external environment, so that the machine can eject the product 5 from the molding cavity 26.

[0057] In order to extract the inner drawing needle 6 from the inside of the molding cavity 26, separate the inner drawing needle 6 from the product 5, and then take the product 5 out of the molding cavity 26, a pulling assembly 7 is provided at one end of the two inner drawing needles 6 away from the molding cavity 26. The pulling assembly 7 is used to drive the inner drawing needle 6 to slide in the channel 25. The structure of the pulling assembly 7 is detailed below. Fig.16 and Fig.17 The traction assembly 7 includes an oil cylinder 71 fixedly connected to one side of the movable template 2, and the other end of the piston rod of the oil cylinder 71 is fixedly connected to an upper wear-resistant plate 72, and the upper wear-resistant plate 72 is slidably arranged on the upper side of the movable template 2. Two first slide grooves 73 are symmetrically provided on the side of the upper wear-resistant plate 72 close to the forming cavity 26, and two embedded grooves 61 are symmetrically provided on the inner pull-out inserting needle 6. The two embedded grooves 61 on the inner pull-out inserting needle 6 are embedded in the corresponding first slide grooves 73, and the end of the inner pull-out inserting needle 6 away from the forming cavity 26 is slidably arranged in the first slide groove 73. By contracting the piston rod of the oil cylinder 71, the upper wear-resistant plate 72 is driven away from the forming cavity 26, and the moving upper wear-resistant plate 72 drives the inner pull-out inserting needle 6 to approach the oil cylinder 71 through the first slide groove 73, so that the inner pull-out inserting needle 6 moves along the channel 2 5, at this time, the engaging groove 61 on the inner pull-out pin 6 slides along the inner wall of the first slide groove 73, so that the upper wear-resistant plate 72 pulls one end of the inner pull-out pin 6 out of the molding cavity 26, so that the inner pull-out pin 6 is separated from the product 5, and then the end of the inner pull-out pin 6 away from the oil cylinder 71 enters the interior of the channel 25 through the clamping hole 41 and the middle groove 111, and the restriction of the inner pull-out pin 6 on the position of the inner slider core 4 and the first guide block 11 is released, and the one-time mold opening of the product 5 is completed. By adopting the demoulding method of the inner pull-out pin 6, the undercut part with a larger stroke of the product 5 can be set at the position in contact with the inner pull-out pin 6, and there is no strength problem and force problem on the inclined top, as well as the problem of ejection height. Compared with the inclined top, the inner pull-out pin 6 is not easy to break and has stronger stability.

[0058] In order to separate the product 5 from the outer slider core 8 and the inner wall of the molding cavity 26, four pushing mechanisms 9 are arranged near the four corners of the lower mold 1. When the molding cavity 26 is exposed to the external environment and the inner draw pin 6 leaves the middle groove 111, the pushing mechanism 9 pushes the movable mold plate 2 away from the lower mold 1. The structure of the pushing mechanism 9 is detailed below. Figure 7 , Fig.10 and Fig.18 Four embedded grooves 13 are provided at the top of the lower mold 1 near the four corners. The pushing mechanism 9 includes a coil spring 92 fixedly connected to the inner bottom surface of the embedded groove 13. The upper end of the coil spring 92 contacts the lower surface of the movable template 2. When the inner pull-out needle 6 is set in the clamping hole 41 and the middle groove 111, the inner pull-out needle 6 locks the position of the first guide block 11 and the inner slider core 4. The lower surface of the movable template 2 is in close contact with the lower mold 1. At this time, the coil spring 92 is in an elastically compressed state. After the inner pull-out needle 6 is pulled out of the clamping hole 41 and the middle groove 111, the inner pull-out needle 6 releases the restriction on the position of the first guide block 11 and the inner slider core 4. The coil spring 92 rebounds and pushes the movable template 2 to move vertically upward. At the same time, a limiting screw is fixedly connected to the lower surface of the movable template 2. 91. The limit screw 91 is arranged inside the coil spring 92. Two support plates are symmetrically fixedly connected to the lower surface of the lower mold 1. A movable groove 14 is opened inside the support plate at a position corresponding to the embedded groove 13. The limit screw 91 consists of a rod body and a head fixed at the lower end of the rod body. The lower end of the rod body of the limit screw 91 passes through the lower side surface of the embedded groove 13 and extends into the movable groove 14. The limit screw 91 limits the movable template 2 to only move vertically. The head of the limit screw 91 is arranged in the movable groove 14. When the movable template 2 moves vertically upward, the movable template 2 drives the limit screw 91 to move upward synchronously. When the head of the limit screw 91 contacts the top surface inside the movable groove 14, the coil spring 92 cannot push the movable template 2 to continue to move upward, thereby limiting the maximum height of the movable template 2.

[0059] Since the first guide block 11 and the second guide block 12 are fixedly arranged on the upper side surface of the lower mold 1, when the movable template 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 template 2. At this time, in order to enable the ejection mechanism to push the product 5 in the direction away from the lower mold 1, a core pressing plate 23 is fixedly connected to the bottom surface inside the installation cavity, and the upper side surface of the core pressing plate 23 is set as an inclined surface. The lower side surface of the inner slider core 4 is in sliding contact with the inclined surface of the core pressing plate 23. The inner slider core 4 is L The inner slider core 4 is divided into two sections at the L-shaped corner as a dividing point. The two sections of the inner slider core 4 are respectively in contact with the first guide block 11 and the core pressure plate 23. The section of the inner slider core 4 in contact with the first guide block 11 is inclined, and a second slide groove 42 is provided on the inclined surface of the inner slider core 4. The second slide groove 42 is inclined and has the same inclination as the inclined surface of the inner slider core 4. A T-block 112 is fixedly connected to the inclined surface of the first guide block 11. The T-block 112 is slidably arranged inside the second slide groove 42. Fig.18 and Fig. 20When the movable template 2 moves upward, through the sliding connection between the inclined surface of the first guide block 11 and the inner slider core 4, and the sliding connection between the inner slider core 4 and the inclined surface of the core pressure plate 23, the movable template 2 pushes the inner slider core 4 to slide upward along the inclined surface of the inner core pressure plate 23 and the first guide block 11, and the upward inner slider core 4 drives the top block 43 to move synchronously, so that the top block 43 pushes the product 5 away from the lower mold 1. At the same time, the second guide block 12 drives the outer slider core 8 to slide downward along the inner wall of the inclined groove 21, and relative sliding occurs between the lower side surface of the moving second guide block 12 and the inclined surface of the second guide block 12, accelerating the separation of the outer slider core 8 and the product 5, separating the product 5 from the inner wall of the molding cavity 26, and completing the secondary mold opening of the product 5. By using the inner slider core 4 and the top block 43 to eject the product 5 from the inside of the molding cavity 26, the release amount of the product 5 is smaller than that of the inclined top structure, and the release stability of the product 5 is also stronger.

[0060] In order to ensure that there is no position deviation between the movable template 2 and the upper mold 3 when the movable template 2 and the upper mold 3 are closed, guide sleeves are provided at the four corners of the movable template 2 close to the upper mold 3. When the movable template 2 and the upper mold 3 are close to each other for closing, the guide sleeves guide the upper mold 3 to ensure the accurate closing of the movable template 2 and the upper mold 3.

[0061] When the injection mold is in use, the lower mold 1, the movable mold plate 2 and the upper mold 3 are all placed horizontally. When the molten injection material is solidified inside the molding cavity 26 to form the product 5, the machine releases the fixing of the movable mold plate 2 by the buckle machine 31, and then uses the mobile platform to drive the lower mold 1 and the movable mold plate 2 away from the upper mold 3, so that the upper mold 3 is separated from the movable mold plate 2, and the molding cavity 26 and the product 5 inside it are exposed to the external environment, and then the oil cylinder 71 is started to extract the inner pull-out pin 6 from the clamping hole 41 and the middle groove 111, so that the inner pull-out pin 6 is extracted from the undercut part on the product 5, completing a mold opening of the product 5. At this time, the coil spring 92 rebounds to move the movable mold plate 2 away from the lower mold. The mold 1 is pushed in the direction of the mold 1, so that the first guide block 11 and the second guide block 12 move relative to the movable template 2 toward the direction close to the lower mold 1, and the second guide block 12 drives the outer slider core 8 to separate from the product 5, and the first guide block 11 drives the inner slider core 4 and the top block 43 to move obliquely upward, so that the top block 43 ejects the product 5 from the molding cavity 26, completing the secondary mold opening of the product 5. The release in this way makes the release amount of the product 5 smaller than that of the inclined top structure. The structural strength of the inner slider core 4 and the top block 43 is not easy to break compared with the inclined top, and the stability is stronger. The product 5 ejected from the molding cavity 26 by the top block 43 falls under the action of gravity, thereby realizing automatic unloading of the product 5.

[0062] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An injection mold with a slider core-pulling mechanism in a small space realized by secondary mold opening, 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 plate (3), the upper mold plate (3) is provided with a locking mechanism, the locking mechanism is used to fix the movable mold plate (2) and the upper mold (3), and four pushing mechanisms (9) are provided near the four corners of the lower mold (1); The upper side surface of the movable template (2) is symmetrically provided with two molding cavities (26), and two products (5) are respectively arranged in the two molding cavities (26). Two ejection mechanisms are symmetrically provided below the products (5), and the ejection mechanisms are used to push the products (5) in a direction away from the lower mold (1). The ejection mechanisms include a first guide block (11) symmetrically fixedly provided on the upper side surface of the movable template (2), and a vertical groove (22) is symmetrically provided on the movable template (2). The first guide block (11) is slidably provided in the vertical groove (22), and a position near the top of one side of the first guide block (11) is provided as an inclined surface. The first guide block (11) 11) An inner slider core (4) is provided on one side of the inclined surface, a top block (43) is fixedly connected to the top of the inner slider core (4), a mounting cavity connected to the vertical groove (22) is provided inside the movable mold plate (2), the inner slider core (4) and the top block (43) are arranged in the mounting cavity, a core pressure plate (23) is fixedly connected to the bottom surface inside the mounting cavity, the upper side surface of the core pressure plate (23) is arranged as an inclined surface, the lower side surface of the inner slider core (4) is in sliding contact with the inclined surface of the core pressure plate (23), the mounting cavity is connected to the inside of the molding cavity (26), and the upper side surface of the top block (43) is in contact with the product (5); A movable model core (24) is fixedly arranged on the bottom surface of the molding cavity (26), and two channels (25) are symmetrically provided inside the movable model core (24). An inner draw-out needle (6) is slidably arranged inside the channel (25). The channel (25) and the inner draw-out needle (6) are both inclinedly arranged. A traction assembly (7) is arranged at one end of the two inner draw-out needles (6) away from the molding cavity (26). The traction assembly (7) is used to drive the inner draw-out needle (6) to slide in the channel (25). The first guide block (1 1), a middle groove (111) is provided on the inner slider core (4), a clamping hole (41) is provided on the inner slider core (4), when the lower surface of the movable template (2) contacts the lower mold (1), a corresponding group of clamping holes (41), the middle groove (111) and the channel (25) are located on the same axis, and the inner draw-out pin (6) is arranged in the clamping hole (41) and the middle groove (111), when the inner draw-out pin (6) leaves the middle groove (111), the pushing mechanism (9) pushes the movable template (2) in a direction away from the lower mold (1).

2. The injection mold of the slider core-pulling mechanism in a small space realized by secondary mold opening according to claim 1, characterized in that: Two demoulding mechanisms are symmetrically arranged below the product (5), and the demoulding mechanism includes a second guide block (12) fixedly arranged on the upper surface of the lower mold (1), and the movable mold plate (2) is provided with an inclined groove (21) connected to the molding cavity (26), and an outer slider core (8) is slidably arranged inside the inclined groove (21), and the upper side surface of the second guide block (12) is set as an inclined surface, and the lower side surface of the outer slider core (8) is slidably connected to the inclined surface of the second guide block (12), and when the lower surface of the movable mold plate (2) contacts the lower mold (1), the upper end of the outer slider core (8) contacts the bottom of the product (5).

3. The injection mold of the slider core-pulling mechanism in a small space realized by secondary mold opening according to claim 1, characterized in that: When the lower surface of the movable template (2) contacts the lower mold (1), the end of the inner drawing pin (6) away from the pulling assembly (7) extends into the interior of the molding cavity (26) and contacts the product (5).

4. The injection mold of the slider core-pulling mechanism in a small space realized by secondary mold opening according to claim 1, characterized in that: Four embedded grooves (13) are provided at the top of the lower mold (1) near the four corners. The pushing mechanism (9) includes a coil spring (92) fixedly connected to the inner bottom surface of the embedded groove (13). The upper end of the coil spring (92) contacts the lower surface of the movable mold plate (2). When the inner pull-out pin (6) leaves the middle groove (111), the coil spring (92) pushes the movable mold plate (2) away from the lower mold (1).

5. The injection mold of the slider core-pulling mechanism in a small space realized by secondary mold opening according to claim 4, characterized in that: The pushing mechanism (9) also includes a limit screw (91) fixedly connected to the lower surface of the movable template (2), and the limit screw (91) is arranged inside the coil spring (92). Two support plates are symmetrically fixedly connected to the lower surface of the lower mold (1), and a movable groove (14) is opened at a position corresponding to the embedded groove (13) inside the support plate. The limit screw (91) consists of a rod body and a head fixed at the lower end of the rod body. The lower end of the rod body of the limit screw (91) passes through the lower side of the embedded groove (13) and extends into the movable groove (14), and the head of the limit screw (91) is arranged in the movable groove (14).

6. The injection mold of the slider core-pulling mechanism in a small space realized by secondary mold opening according to claim 1, characterized in that: The traction assembly (7) includes an oil cylinder (71) fixedly connected to one side of the movable template (2), the other end of the piston rod of the oil cylinder (71) is fixedly connected to an upper wear-resistant plate (72), the upper wear-resistant plate (72) is slidably arranged on the upper side of the movable template (2), and two first sliding grooves (73) are symmetrically provided on one side of the upper wear-resistant plate (72) close to the molding cavity (26), and two embedding grooves (61) are symmetrically provided on the inner pull-out insert pin (6), and the two embedding grooves (61) on the inner pull-out insert pin (6) are embedded in the corresponding first sliding grooves (73).

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

8. The injection mold of the slider core-pulling mechanism in a small space realized by secondary mold opening according to claim 1, characterized in that: The locking mechanism comprises four latches (31) hinged on opposite sides of the upper mold (3), the latches (31) being of an L-shaped structure, and four slots are provided on the movable mold plate (2) at positions corresponding to the latches (31). When one end of the latches (31) away from the upper mold (3) is inserted into the corresponding slots, the latches (31) cooperate with the slots to fix the movable mold plate (2) on the lower side of the upper mold (3).

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