A strong release structure for special-shaped buckles of plastic injection molds

Abstract

The present invention relates to a structure for forcing the release of a shaped buckle from a plastic injection mold. The structure comprises an upper mold body and a lower mold body. The upper mold body comprises a fixed mold plate with a cavity formed therein, and the lower mold body comprises a movable mold plate with a core formed therein. A forming slider for forming a decorative strip is slidably connected within the core. The forming slider is provided with a first forming groove for forming a reinforcing rib and a forming area for forming the shaped buckle. The present invention ensures smooth demolding of components such as the decorative strip through a multi-stage forced release mechanism.

Description

Technical Field

[0001] The invention relates to the field of molds, in particular to a special-shaped buckle strong-release structure of a plastic injection mold. Background Art

[0002] A plastic part such as Figure 14 and Figure 15 The plastic part comprises a plastic part body 9, a decorative strip 91 is provided on one side of the plastic part body 9, an umbrella-shaped special-shaped buckle 92 and a reinforcing rib 93 are provided on the back of the decorative strip 91, and an assembly hole 94 is provided in the middle of the special-shaped buckle 92.

[0003] In the plastic mold, the assembly holes 94 are formed by forming rods. After the product is formed, the forming rods and the assembly holes 94 will form an undercut structure, which affects the demoulding of the product. Therefore, the undercut structure between the assembly holes 94 and the forming rods needs to be released before the product is ejected from the mold. Summary of the Invention

[0004] The present application provides a plastic injection mold special-shaped buckle forced release structure, which ensures the smooth demoulding of decorative strips and other components through multi-stage forced release.

[0005] The present application provides a plastic injection mold special-shaped buckle strong release structure adopts the following technical solutions:

[0006] A plastic injection mold special-shaped buckle strong release structure includes an upper mold body and a lower mold body. The upper mold body includes a fixed mold plate with a mold cavity, and the lower mold body includes a movable mold plate with a mold core. A molding slider for molding decorative strips is slidably connected in the mold core. The molding slider is provided with a first molding groove for molding reinforcing ribs and a molding area for molding special-shaped buckles; an inclined groove is provided on the molding slider, and an inclined rod that cooperates with the inclined groove is provided on the mold cavity. The power of opening and closing the mold is converted into the power of sliding the molding slider through the cooperation of the inclined rod and the inclined groove; the molding slider is slidably connected to the first molding rod One end of the first forming rod extends into the forming area for forming an assembly hole, and a limiting plate is provided on the forming slider. The end of the first forming rod away from the forming area passes through the limiting plate and extends out of the forming slider; a first spring is provided in the forming slider, and the elastic force of the first spring acts on the first forming rod to drive the first forming rod to move away from the forming area; a first inclined surface is provided on the cavity, and the inclination of the first inclined surface is smaller than the inclination of the inclined groove; when the mold is closed, the first inclined surface will move to abut against the end of the first forming rod extending out of the forming slider, and gradually push the first forming rod into the forming slider to make the first forming rod extend into the forming area.

[0007] By adopting the above technical solution, the force of mold opening and closing is converted into the sliding force of the first forming rod and the forming slider. When the mold is opened, the first forming rod will move out of the assembly hole, completing the forced release of the first forming rod. When the mold is opened, the forming slider will move away from the decorative edge, thereby completing the forced release of the special-shaped buckle and reinforcing ribs, eliminating the undercut structure of the special-shaped buckle and other components, and ensuring the subsequent smooth demolding of the plastic part. The slope of the first inclined surface is less than the slope of the inclined groove, which makes the movement speed of the first forming rod greater than the sliding speed of the forming slider. After the first forming rod is first released from the assembly hole, the special-shaped buckle will be forced out of the molding area with the sliding of the forming slider, achieving a secondary forced release of the special-shaped buckle structure, reducing the probability of strain and breakage of the special-shaped buckle during forced release.

[0008] Preferably, a second forming rod is slidably connected in the forming slider, and a second forming groove is provided on one end surface of the second forming rod, and the other end of the second forming rod passes through the limit plate and extends out of the forming slider, and the second forming groove is used to form the end of the reinforcing rib away from the plastic part body; a second spring is provided in the forming slider, and the elastic force of the second spring acts on the second forming rod, and a second inclined surface is provided on the cavity, and the inclination of the second inclined surface is smaller than the inclination of the inclined groove; when the mold is closed, the second inclined surface moves to abut against the end of the second forming rod extending out of the forming slider, and gradually pushes the second forming rod into the forming slider to connect the second inclined groove to the first inclined groove.

[0009] By adopting this technical solution, the second forming rod moves faster than the forming slider during mold opening, allowing the second forming groove to first move away from the end of the reinforcing rib, away from the main body of the plastic part. Then, as the forming slider moves, the main body of the reinforcing rib separates from the forming slider, completing the secondary demolding of the reinforcing rib, reducing the probability of fracture or damage to the reinforcing rib during demolding. When the mold is closed, the second inclined surface pushes the second forming rod to reset, thereby driving the second forming groove to reset.

[0010] Preferably, a top block is slidably connected to the forming slider, and a forming area is provided on one side end of the top block; a first chamber is provided in the forming slider, and the end of the top block without the forming area extends into the first chamber, and a matching block 1 is provided on the end of the top block extending into the first chamber; a third spring is provided in the first chamber, and the elastic force of the third spring acts on the matching block 1. When there is no external force, the third spring presses the matching block 1 against the cavity wall of the first chamber close to the limit plate; a first driving mechanism is also provided in the forming slider, and the first driving mechanism is used to drive the matching block 1 to move away from the limit plate, so that the top block moves out of the forming slider.

[0011] By adopting this technical solution, when the mold is opened, the first drive mechanism drives the ejector block to move and extend the slider, causing the ejector block to lift the decorative strip. This assists in the separation of the reinforcing rib from the first and second forming grooves, and the first forming rod from the assembly hole, preventing the decorative strip from excessive tensile deformation during the movement of the molding block and reducing the risk of decorative strip breakage. Furthermore, the ejector block allows the special-shaped buckle to be demolded last, separating the ejection of the reinforcing rib from the special-shaped buckle, achieving multi-stage demolding, which further reduces the risk of decorative strip breakage during the ejection of the reinforcing rib and special-shaped buckle.

[0012] Preferably, the first driving mechanism includes a second chamber provided on the forming slider, a matching block 2 slidably connected to the second chamber, a third inclined surface and a fourth inclined surface provided on both side ends of the matching block 2, a fifth inclined surface provided on the matching block 1, and a sixth inclined surface provided on the second forming rod. The first chamber is connected to the second chamber, the matching block 2 is located between the matching block 1 and the second forming rod, the third inclined surface abuts the fifth inclined surface, and the fourth inclined surface abuts the sixth inclined surface; the elastic force of the second spring is greater than the elastic force of the third spring.

[0013] By adopting the above technical solution, when the mold is opened, the second spring rebounds and pushes the main body of the second forming rod to move closer to the limit plate. At this time, the second forming rod will press the matching block 2 into the first cavity. The movement of the matching block 2 into the first cavity will push the matching block 1 to move, so that the matching block 1 moves away from the limit plate. The third spring is compressed. When the matching block 1 moves away from the limit plate, it will drive the top block to move out of the forming slider. When the mold is closed, the second inclined surface will press the main body of the second forming rod away from the limit plate, so that the second forming groove approaches the first forming groove. When the second forming rod moves to reset, the pressure on the matching block 2 is cancelled. The third spring rebounds and drives the matching block 1 and the top block to move toward the limit plate to reset. When the matching block 1 moves to reset, it will push the matching block 2 into the second cavity, and at the same time, it will also move the top block to reset.

[0014] Preferably, the top block includes a first block, two second blocks, and a second drive assembly. A third chamber connected to the first chamber is provided on the forming slider. The first block is slidably connected in the third chamber. One end of the first block extends into the first chamber, and the matching block is connected to the first block; the two second blocks are respectively slidably connected to the end of the first block away from the limit plate. The forming area includes a first area and a second area. The first area is provided on one of the second blocks, and the second area is provided on the other second block; the second drive assembly is used to control the sliding of the two second blocks; when the mold is in the closed state, the first block and the two second blocks are located in the third chamber, the two second blocks conflict with each other, and the first area and the second area are connected to each other to form a forming area.

[0015] By adopting the above technical solution, after the two second blocks follow the first block to move out of the third chamber, the second driving assembly drives the two second blocks away from each other, releasing the undercut structure of the special-shaped buckle forming area, so that the special-shaped buckle can be smoothly demolded without forced removal, reducing the probability of the special-shaped buckle breaking during demolding.

[0016] Preferably, the second driving assembly includes two mounting holes respectively opened on the two second blocks, two seventh inclined surfaces respectively opened on the two second blocks, and a fourth spring. The two mounting holes are respectively opened on the sides of the two second blocks that are close to each other, and the two seventh inclined surfaces are respectively opened on the sides of the two second blocks that are away from each other. Both ends of the fourth spring are respectively inserted into the two mounting holes. The elastic force of the fourth spring is less than the elastic force of the third spring. The fourth spring always drives the two second blocks away from each other.

[0017] By adopting the above technical solution, when the mold is opened, the two second blocks will follow the first block to move away from the third cavity. As the two second blocks move, the two seventh inclined surfaces will move to conflict with the cavity opening of the third cavity. Subsequently, as the two second blocks continue to move, the fourth spring will rebound and drive the two second blocks away from each other to release the undercut structure of the special-shaped buckle and the molding area. When the mold is closed, the two second blocks will follow the first block to move into the third cavity. In this process, the two seventh inclined surfaces cooperate with the cavity opening of the third cavity to convert the sliding force of the first block into the power for the two second blocks to move closer to each other, so that the two second blocks move closer to each other. Finally, when the two second blocks completely move into the third cavity, the two second blocks conflict with each other, and the first area and the second area are connected to form a molding area.

[0018] The technical effects of the present invention are mainly reflected in the following aspects:

[0019] 1. The present invention sets a multi-stage demoulding structure to reduce the risk of product breakage during demoulding;

[0020] 2. The present invention sets a top block to press against the decorative edge when the molding slider slides, thereby preventing the decorative edge from being compressed and deformed excessively, and reducing the risk of the decorative edge breaking during demoulding;

[0021] 3. The present invention can release the undercut structure between the two second blocks and the special-shaped buckle during demoulding, thereby reducing the risk of the special-shaped buckle breaking during demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the mold of this application.

[0023] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle and upper mold body.

[0024] Figure 3 yes Figure 1Schematic diagram of the structure when a forming slider is removed from the middle and lower mold bodies.

[0025] Figure 4 It is a structural diagram of the forming slider in the mold closing state.

[0026] Figure 5 yes Figure 4 Schematic diagram of the structure of the forming slider from another angle.

[0027] Figure 6 yes Figure 1 Schematic diagram of the structure of the central fixed template and a forming slider.

[0028] Figure 7 yes Figure 6 A partial enlarged view of point A in the middle.

[0029] Figure 8 yes Figure 4 Cross-sectional view of the intermediate molding slider along line BB.

[0030] Figure 9 yes Figure 4 Cross-sectional view of the intermediate molding slider along the CC line.

[0031] Figure 10 yes Figure 8 A partial enlarged view of point D in the middle.

[0032] Figure 11 yes Figure 9 A partial enlarged view of point E in the middle.

[0033] Figure 12 When the mold is in the open state Figure 8 Schematic diagram of the structure of each component.

[0034] Figure 13 When the mold is in the fully open state Figure 8 Schematic diagram of the structure of each component.

[0035] Figure 14 It is a structural diagram of a plastic part.

[0036] Figure 15 yes Figure 14 A partial enlarged view of point F in the middle.

[0037] Figure 16 yes Figure 1 Actual product pictures of the molds.

[0038] Figure 17 yes Figure 2 Actual product picture of the upper mold body in.

[0039] Figure 18 yes Figure 3Actual product picture of the lower mold body during processing.

[0040] Figure 19 yes Figure 3 The actual product picture after the lower mold body is processed

[0041] Reference numerals: 1, upper mold body; 11, fixed mold plate; 111, mold cavity; 112, inclined rod; 113, first inclined surface; 114, second inclined surface; 2, lower mold body; 21, movable mold plate; 211, core; 3, molding slide; 31, first molding groove; 32, molding area; 321, first area; 322, second area; 33, inclined groove; 34, first molding rod; 35, limit plate; 36, first spring; 37, second molding rod; 38, second molding groove; 39, second spring; 4, top block; 4 1. First block; 42. Second block; 51. First chamber; 52. Matching block 1; 53. Third spring; 6. First drive mechanism; 61. Second chamber; 62. Matching block 2; 63. Third inclined plane; 64. Fourth inclined plane; 65. Fifth inclined plane; 66. Sixth inclined plane; 7. Second drive assembly; 71. Mounting hole; 72. Seventh inclined plane; 73. Fourth spring; 8. Third chamber; 9. Plastic part body; 91. Decorative strip; 92. Special-shaped buckle; 93. Reinforcement rib; 94. Assembly hole. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below with reference to the accompanying drawings to make the technical solution of this application easier to understand and grasp.

[0043] Reference Figure 1-Figure 3 In this embodiment, a plastic injection mold special-shaped buckle removal structure includes an upper mold body 1 and a lower mold body 2. The upper mold body 1 includes a fixed mold plate 11, which is provided with a cavity 111. The lower mold body 2 includes a movable mold plate 21, which is provided with a core 211. The core 211 and the cavity 111 can simultaneously mold four plastic parts 9 when the mold is closed.

[0044] Reference Figure 2-Figure 7 Four molding slides 3 for molding the decorative strips 91 are slidably connected within the mold core 211. Each of the four molding slides 3 is provided with an inclined slot 33. Four inclined rods 112, which mate with the inclined slots 33, are fixed to the mold cavity 111. The cooperation between the inclined rods 112 and the inclined slots 33 converts the power of mold opening and closing into the sliding power of the molding slides 3. When the mold is closed, the inclined rods 112 insert into the inclined slots 33, forcing the molding slides 3 to slide toward area A on the mold core 211, where the decorative strips 91 are molded. When the mold is opened, the inclined rods 112 exit the inclined slots 33, forcing the molding slides 3 away from the already-molded decorative strips 91.

[0045] Reference Figure 3 、 Figure 4 and Figure 8A limiting plate 35 is fixed to the forming slider 3. A first forming groove 31 for forming the main body of the reinforcing rib 93 is defined on one surface of the forming slider 3. The limiting plate 35 and the first forming groove 31 are located on either side of the forming slider 3. A second forming rod 37 is slidably connected to the forming slider 3. A second forming groove 38 is defined on one end surface of the second forming rod 37. The other end of the second forming rod 37 passes through the limiting plate 35 and extends out of the forming slider 3. The second forming groove 38 is used to form the end of the reinforcing rib 93 away from the plastic component body 9.

[0046] Reference Figure 4 、 Figure 5 and Figure 8 A second spring 39 is placed in the forming slider 3. The elastic force of the second spring 39 acts on the second forming rod 37. The second spring 39 always drives the second forming rod 37 to move away from the first forming groove 31. When the mold is in the open mold state, the second spring 39 presses the second forming rod 37 against the limit plate 35. The second forming groove 38 is located in the forming slider 3.

[0047] Reference Figure 5-Figure 7 The mold cavity 111 is provided with four second inclined surfaces 114. The four first inclined surfaces 113 respectively contact the four second forming rods 37 when the mold is closed. The slope of the second inclined surfaces 114 is smaller than that of the inclined grooves 33, so that the second forming rods 37 move faster than the forming slide 3 when the mold is opened. When the mold is in the closed state, the second inclined surfaces 114 move to contact the end of the second forming rod 37 extending from the forming slide 3, gradually pushing the second forming rod 37 into the forming slide 3, compressing the second spring 39 and moving the second forming groove 38 until it connects with the first forming groove 31.

[0048] Reference Figure 4 、 Figures 8-10 The molding slider 3 defines a first chamber 51 and a third chamber 8, wherein the first chamber 51 is in communication with the third chamber 8. The top block 4 is slidably connected to the third chamber 8. The top block 4 defines a molding area 32 for molding the special-shaped buckle 92. The top block 4 includes a first block 41, one end of which extends into the first chamber 51 and is fixedly connected to a mating block 1 52, which is slidably connected to the second chamber 61.

[0049] Reference Figure 10 A third spring 53 is placed in the first chamber 51. The third spring 53 is sleeved on the outside of the first block 41. The elastic force of the third spring 53 always acts on the matching block 1 52. When the mold is in the mold closing state, the third spring 53 presses the matching block 1 52 against the cavity wall of the first chamber 51 away from the third chamber 8.

[0050] Reference Figures 8-10The top block 4 also includes two second blocks 42, which are slidably connected to the end of the first block 41 away from the first cavity 51. In this embodiment, the two second blocks 42 slide with the first block 41 by means of dovetail blocks and dovetail grooves, and the sliding direction of the two second blocks 42 is perpendicular to the sliding direction of the first block 41. The molding area 32 includes a first area 321 and a second area 322. The first area 321 is provided on one of the second blocks 42, and the second area 322 is provided on the other second block 42. When the mold is in the closed state, the first block 41 and the two second blocks 42 are located in the third cavity 8, the two second blocks 42 are in contact with each other, and the first area 321 and the second area 322 are connected to form the molding area 32.

[0051] Reference Figures 8-10 The forming slider 3 is further provided with a first drive mechanism 6 for driving the first mating block 52 to move away from the limiting plate 35, thereby causing the two second blocks 42 to extend and form the third cavity 8. The first drive mechanism 6 includes a second cavity 61 defined on the forming slider 3, a second mating block 62 slidably connected to the second cavity 61, third and fourth inclined surfaces 63 and 64 defined on both side ends of the second mating block 62, a fifth inclined surface 65 defined on the first mating block 52, and a sixth inclined surface 66 defined on the second forming rod 37.

[0052] Reference Figures 8-10 The first chamber 51 communicates with the second chamber 61. The second mating block 62 is located between the first mating block 52 and the second forming rod 37. The third inclined surface 63 abuts the fifth inclined surface 65, and the fourth inclined surface 64 abuts the sixth inclined surface 66. The third inclined surface 63 and the fifth inclined surface 65 cooperate to transmit force between the first mating block 52 and the second mating block 62. The fourth inclined surface 64 and the sixth inclined surface 66 cooperate to transmit force between the second forming rod 37 and the second mating block 62. The elastic force of the second spring 39 is greater than the elastic force of the third spring 53, ensuring that the second forming rod 37 returns to its original position when the mold is opened.

[0053] Reference Figures 8-10 When the mold is in the open state, the second molding rod 37 moves to press the second mating block 62 into the first cavity 51, so that the second mating block 62 drives the first mating block 52 to move away from the cavity wall of the first cavity 51 close to the limit plate 35, and allows the third spring 53 to be compressed; when the mold is in the closed state, the third spring 53 will press against the cavity wall of the first cavity 51 close to the limit plate 35, and the second mating block 62 is located in the second cavity 61.

[0054] Reference Figures 8-11The top block 4 further includes a second drive assembly 7, which is used to control the sliding of the two second blocks 42. The second drive assembly 7 includes four mounting holes 71 respectively provided on the two second blocks 42, two seventh inclined surfaces 72 respectively provided on the two second blocks 42, and two fourth springs 73. The two mounting holes 71 are respectively provided on the surfaces of the two second blocks 42 that are closer to each other, and the two seventh inclined surfaces 72 are respectively provided on the surfaces of the two second blocks 42 that are farther away from each other.

[0055] Reference Figures 8-11 Each second block 42 is provided with two mounting holes 71, and the two mounting holes 71 of each second block 42 are arranged opposite to each other. The two ends of the two fourth springs 73 are respectively inserted into the two oppositely arranged mounting holes 71. The elastic force of the two fourth springs 73 is smaller than the elastic force of the third spring 53. The two fourth springs 73 always drive the two second blocks 42 away from each other.

[0056] Reference Figure 8 、 Figure 10 、 Figure 12 、 Figure 13 As the two second blocks 42 gradually move out of the third chamber 8, the two fourth springs 73 rebound and drive the two second blocks 42 away from each other. When the two second blocks 42 move into the third chamber 8, the two seventh inclined surfaces 72 move until they come into contact with the opening of the third chamber 8. Through the cooperation of the two seventh inclined surfaces 72 and the opening of the third chamber 8, the sliding force of the first block 41 is converted into a force that moves the two second blocks 42 toward each other, thereby compressing the two second springs 39.

[0057] Reference Figure 8 A first forming rod 34 is slidably connected to the forming slider 3. One end of the first forming rod 34 passes through the matching block 52, the first block 41, and the two second blocks 42 and then extends into the forming area 32. The end of the first forming rod 34 extending into the forming area 32 is used to form the assembly hole 94. The end of the first forming rod 34 away from the forming area 32 passes through the limit plate 35 and extends out of the forming slider 3.

[0058] Reference Figure 4-Figure 8 A first spring 36 is provided in the forming slider 3, and the first spring 36 is sleeved on the outside of the first forming rod 34. The first spring 36 is located between the first chamber 51 and the limit plate 35. The elastic force of the first spring 36 acts on the first forming rod 34 to drive the first forming rod 34 to move away from the forming area 32; four first inclined surfaces 113 are opened on the cavity 111, and the four first inclined surfaces 113 will respectively conflict with the four first forming rods 34 when the mold is closed.

[0059] Reference Figure 4-Figure 8When the mold is in the open state, the first spring 36 presses the first forming rod 34 against the limit plate 35, and the end of the first forming rod 34 near the forming area 32 is located outside the forming area 32. When the mold is in the closed state, the first inclined surface 113 moves to abut against the end of the first forming rod 34 extending from the forming slider 3, gradually pushing the first forming rod 34 into the forming slider 3, causing the first spring 36 to be compressed and the end of the first forming rod 34 used to form the assembly hole 94 to move and extend into the forming area 32. The slope of the first inclined surface 113 is smaller than the slope of the inclined groove 33, so that the movement speed of the first forming rod 34 is greater than the movement speed of the forming slider 3.

[0060] Reference Figure 4-13 The complete injection molding and demoulding process of the mold of this application is as follows:

[0061] First, the injection molding machine controls the lower mold body 2 to move toward the upper mold body 1, closing the mold. When the mold is closed, the four inclined rods 112 are inserted into the four inclined slots 33, driving the four forming slides 3 to slide. At the same time, the four first inclined surfaces 113 and the four second inclined surfaces 114 move until they respectively come into contact with the four first forming rods 34 and the four second forming rods 37, pushing the four first forming rods 34 and the four second forming rods 37 into their corresponding forming slides 3.

[0062] When the second forming rod 37 moves into the forming slider 3, the main body of the second forming rod 37 moves away from the limiting plate 35, eventually allowing the second forming groove 38 to mate with the first forming groove 31, preparing for the formation of the reinforcing rib 93. When the second forming rod 37 returns to its original position, it releases the pressure on the second mating block 62. The third spring 53 rebounds and drives the first mating block 52, the first block 41, and the two second blocks 42 toward the limiting plate 35. When the first mating block 52 returns to its original position, it pushes the second mating block 62 into the second cavity 61.

[0063] When the first block 41 and the two second blocks 42 move toward the limiting plate 35, they move into the third chamber 8. During this process, the two seventh inclined surfaces 72 cooperate with the opening of the third chamber 8 to convert the sliding force of the first block 41 into a force that moves the two second blocks 42 toward each other, causing the two second blocks 42 to move toward each other. Ultimately, the two second blocks 42 completely move into the third chamber 8, where they abut against each other. The first area 321 and the second area 322 communicate with each other to form the forming area 32. When the first forming rod 34 moves into the forming slider 3, it extends into the forming area 32, thereby preparing for the formation of the assembly hole 94.

[0064] After the mold is closed, the injection molding machine injects hot melt plastic into the mold, and four plastic parts 9 are simultaneously formed between the core 211 and the cavity 111. After the injection molding of the four plastic parts 9 is completed, the injection molding machine controls the mold to start moving the lower mold body 2 away from the upper mold body 1.

[0065] As the lower mold body 2 moves away from the upper mold body 1, the inclined rod 112 is pulled out of the inclined slot 33, driving the molding slide 3 to move away from the already formed decorative strip 91 and reinforcing rib 93. During the mold opening process, the cavity 111 also moves away from the core 211, gradually eliminating the pressure exerted by the four first inclined surfaces 113 on the four first molding rods 34 and the four second inclined surfaces 114 on the four second molding rods 37. As the pressure exerted by the first inclined surfaces 113 on the first molding rods 34 is gradually eliminated, the first spring 36 rebounds, driving the first molding rods 34 out of the assembly hole 94, releasing the inverted lock between the assembly hole 94 and the first molding rod 34.

[0066] When the second inclined surface 114 releases its pressure on the second forming rod 37, the second spring 39 rebounds, driving the main body of the second forming rod 37 toward the limiting plate 35. This allows the second forming groove 38 to move the rib 93 away from the end of the plastic component body 9 faster than the forming slider 3. Then, as the forming slider 3 moves, the main body of the rib 93 separates from the forming slider 3, completing the secondary demolding of the rib 93 and reducing the probability of the rib 93 breaking or being damaged during demolding.

[0067] When the main body of the second forming rod 37 moves toward the limiting plate 35, the second forming rod 37 presses the second mating block 62 into the first cavity 51. The movement of the second mating block 62 into the first cavity 51 pushes the first mating block 52, causing the first mating block 52 to move away from the limiting plate 35, compressing the third spring 53. When the first mating block 52 moves away from the limiting plate 35, it drives the first block 41 and the two second blocks 42 out of the third cavity 8.

[0068] When the two second blocks 42 move out of the third chamber 8, they will lift up the decorative strip 91, thereby preventing the decorative strip 91 from being excessively tensilely deformed when the reinforcing rib 93 is separated from the first molding groove 31, the second molding groove 38 and the first molding rod 34 is separated from the assembly hole 94, thereby reducing the risk of the decorative strip 91 breaking.

[0069] As the two second blocks 42 subsequently move, the two seventh inclined surfaces 72 move until they come into contact with the opening of the third chamber 8. As the two second blocks 42 continue to move, the fourth spring 73 rebounds and drives the two second blocks 42 away from each other, releasing the undercut structure between the shaped buckle 92 and the molding area 32. This eliminates the need for forced demolding of the shaped buckle 92.

[0070] After the undercut structure between the special-shaped buckle 92 and the molding area 32 is released, the two second blocks 42 will move away from the special-shaped buckle 92 along with the molding slider 3, so that the two second blocks 42 will not interfere with the ejection path of the special-shaped buckle 92 when the plastic part is ejected from the core 211, allowing the plastic part to be demolded smoothly.

[0071] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A plastic injection mold special-shaped buckle strong release structure, comprising an upper mold body (1) and a lower mold body (2), wherein the upper mold body (1) comprises a fixed mold plate (11), the fixed mold plate (11) is provided with a cavity (111), and the lower mold body (2) comprises a movable mold plate (21), the movable mold plate (21) is provided with a core (211), and is characterized in that: A forming slider (3) for forming a decorative strip (91) is slidably connected in the core (211), and a first forming groove (31) for forming a reinforcing rib (93) and a forming area (32) for forming a special-shaped buckle (92) are provided on the forming slider (3); an inclined groove (33) is provided on the forming slider (3), and an inclined rod (112) matched with the inclined groove (33) is provided on the cavity (111). The power of opening and closing the mold is converted into the power of sliding the forming slider (3) through the cooperation of the inclined rod (112) and the inclined groove (33); a first forming rod (34) is slidably connected to the forming slider (3), and one end of the first forming rod (34) extends into the forming area (32) for In the forming assembly hole (94), a limiting plate (35) is provided on the forming slider (3), and one end of the first forming rod (34) away from the forming area (32) passes through the limiting plate (35) and extends out of the forming slider (3); a first spring (36) is provided in the forming slider (3), and the elastic force of the first spring (36) acts on the first forming rod (34) to drive the first forming rod (34) to move away from the forming area (32); a first inclined surface (113) is provided on the cavity (111), and the inclination of the first inclined surface (113) is smaller than the inclination of the inclined groove (33); when the mold is closed, the first inclined surface (113) will move to the end of the first forming rod (34) extending out of the forming slider (3) The first forming rod (34) is abutted against each other, and the first forming rod (34) is gradually pushed into the forming slider (3) so that the first forming rod (34) extends into the forming area (32); a top block (4) is slidably connected to the forming slider (3), and the forming area (32) is provided on one end of the top block (4); a first chamber (51) is provided in the forming slider (3), and the end of the top block (4) without the forming area (32) extends into the first chamber (51), and a matching block (52) is provided on the end of the top block (4) extending into the first chamber (51); the top block (4) includes a first block (41), two second blocks (42), and a second driving assembly (7); a first chamber (51) is provided on the forming slider (3) and a second driving assembly (7) is provided for connecting the first The third chamber (8) of the chamber (51), the first block (41) is slidably connected in the third chamber (8), one end of the first block (41) extends into the first chamber (51), and the matching block (52) is connected to the first block (41); the two second blocks (42) are respectively slidably connected to one end of the first block (41) away from the limiting plate (35), the forming area (32) includes a first area (321) and a second area (322), the first area (321) is opened on one of the second blocks (42), and the second area (322) is opened on the other second block (42); the second driving component (7) is used to control the sliding of the two second blocks (42).

2. A plastic injection mold special-shaped buckle strong release structure according to claim 1, characterized in that: A second forming rod (37) is slidably connected in the forming slider (3), and a second forming groove (38) is provided on an end surface of one end of the second forming rod (37). The other end of the second forming rod (37) passes through the limiting plate (35) and extends out of the forming slider (3). The second forming groove (38) is used to form the end of the reinforcing rib (93) away from the plastic part body (9); a second spring (39) is provided in the forming slider (3), and the elastic force of the second spring (39) acts on the second forming rod (37). A second inclined surface (114) is provided on the cavity (111), and the inclination of the second inclined surface (114) is smaller than the inclination of the inclined groove (33); when the mold is closed, the second inclined surface (114) moves to abut against the end of the second forming rod (37) extending out of the forming slider (3), and gradually pushes the second forming rod (37) into the forming slider (3) so that the second forming groove (38) is connected to the first forming groove (31).

3. A plastic injection mold special-shaped buckle strong release structure according to claim 2, characterized in that: A third spring (53) is provided in the first chamber (51), and the elastic force of the third spring (53) acts on the matching block (52). When no external force is applied, the third spring (53) presses the matching block (52) against the cavity wall of the first chamber (51) near the limiting plate (35). A first driving mechanism (6) is also provided in the forming slider (3), and the first driving mechanism (6) is used to drive the matching block (52) to move away from the limiting plate (35).

4. A plastic injection mold special-shaped buckle strong release structure according to claim 3, characterized in that: The first driving mechanism (6) includes a second chamber (61) provided on the forming slider (3), a second matching block (62) slidably connected to the second chamber (61), a third inclined surface (63) and a fourth inclined surface (64) provided on both side ends of the second matching block (62), a fifth inclined surface (65) provided on the first matching block (52), and a sixth inclined surface (66) provided on the second forming rod (37). The first chamber (51) is connected to the second chamber (61), the second matching block (62) is located between the first matching block (52) and the second forming rod (37), the third inclined surface (63) abuts against the fifth inclined surface (65), and the fourth inclined surface (64) abuts against the sixth inclined surface (66); and the elastic force of the second spring (39) is greater than the elastic force of the third spring (53).

5. A plastic injection mold special-shaped buckle strong release structure according to claim 3, characterized in that: When the mold is in a closed state, the first block (41) and the two second blocks (42) are located in the third cavity (8), the two second blocks (42) are in contact with each other, and the first area (321) and the second area (322) are connected to each other to form a molding area (32).

6. A plastic injection mold special-shaped buckle strong release structure according to claim 5, characterized in that: The second driving assembly (7) comprises two mounting holes (71) respectively provided on the two second blocks (42), two seventh inclined surfaces (72) respectively provided on the two second blocks (42), and a fourth spring (73). The two mounting holes (71) are respectively provided on a side of the two second blocks (42) close to each other, and the two seventh inclined surfaces (72) are respectively provided on a side of the two second blocks (42) away from each other. Both ends of the fourth spring (73) are respectively inserted into the two mounting holes (71). The elastic force of the fourth spring (73) is less than the elastic force of the third spring (53). The fourth spring (73) always drives the two second blocks (42) away from each other.

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