Forced demolding structure for special-shaped buckle of plastic injection mold

Abstract

The invention relates to a plastic injection mold special-shaped buckle forced demolding structure which comprises an upper mold body and a lower mold body, the upper mold body comprises a fixed mold plate, a cavity is formed in the fixed mold plate, the lower mold body comprises a movable mold plate, a mold core is arranged on the movable mold plate, and a molding sliding block used for molding a decoration strip is slidably connected into the mold core. The forming sliding block is provided with a first forming groove used for forming a reinforcing rib and a forming area used for forming a special-shaped buckle. Through a multi-stage forced demolding mode, smooth demolding of parts such as decoration strips is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of molds, and particularly to a strong ejection structure for special-shaped buckles of plastic injection molds. Background Art

[0002] A plastic part, such as Figure 14 and Figure 15 shown, is injection molded by a mold. The plastic part includes a plastic part body 9. One side of the plastic part body 9 is provided with a decorative strip 91. An umbrella-shaped special-shaped buckle 92 and a reinforcing rib 93 are provided on the back surface of the decorative strip 91. An assembly hole 94 is formed in the middle of the special-shaped buckle 92.

[0003] In a plastic mold, the assembly hole 94 is formed by a forming rod. After the product is formed, an undercut structure will be formed between the forming rod and the assembly hole 94, which affects the demolding of the product. Therefore, before the product is ejected and demolded, the undercut structure between the assembly hole 94 and the forming rod needs to be released. Summary of the Invention

[0004] The present application provides a strong ejection structure for special-shaped buckles of a plastic injection mold, which ensures the smooth demolding of components such as decorative strips through a multi-stage strong ejection form.

[0005] The strong ejection structure for special-shaped buckles of a plastic injection mold provided by the present application adopts the following technical solutions: A strong ejection structure for special-shaped buckles of a plastic injection mold includes an upper mold body and a lower mold body. The upper mold body includes a fixed template, and a cavity is provided on the fixed template. The lower mold body includes a movable template, and a core is provided on the movable template. A forming slider for forming a decorative strip is slidably connected inside the core. A first forming groove for forming a reinforcing rib and a forming area for forming a special-shaped buckle are formed on the forming slider. An inclined groove is formed on the forming slider, and an inclined rod matched with the inclined groove is provided on the cavity. The power of the mold opening and closing is converted into the power for the forming slider to slide through the cooperation of the inclined rod and the inclined groove. A first forming rod is slidably connected to the forming slider. One end of the first forming rod extends into the forming area to form an assembly hole. A limiting plate is provided on the forming slider. The end of the first forming rod far from the forming area passes through the limiting plate and extends out of the forming slider. A first spring is arranged inside 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 formed on the cavity, and the slope of the first inclined surface is smaller than the slope 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, so that the first forming rod extends into the forming area.

[0006] By adopting the above technical solution, the force of mold opening and closing is converted into the sliding force of the first molding rod and the molding slider. When the mold is opened, the first molding rod will move out of the assembly hole to complete the forced release of the first molding rod. When the mold is opened, the molding slider will move away from the decorative edge, thereby completing the forced release of the special-shaped buckle and the reinforcing rib, releasing the undercut structure of the special-shaped buckle and other parts, and ensuring the subsequent smooth demolding of the plastic part. The slope of the first inclined surface is smaller than the slope of the inclined groove, which will make the movement speed of the first molding rod greater than the sliding speed of the molding slider, so that after the first molding rod is first separated from the assembly hole, the special-shaped buckle will be forced to separate from the molding area with the slider of the molding slider, so as to achieve the secondary forced release of the special-shaped buckle structure, and reduce the probability of strain and breakage when the special-shaped buckle is forced to be released.

[0007] Preferably, a second molding rod is slidably connected in the molding slider, a second molding groove is provided on the end surface of one end of the second molding rod, the other end of the second molding rod passes through the limiting plate and extends out of the molding slider, and the second molding groove is used for molding the end of the reinforcing rib away from the plastic part body; a second spring is provided in the molding slider, the elastic force of the second spring acts on the second molding rod, 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 molding rod extending out of the molding slider, and gradually pushes the second molding rod into the molding slider to connect the second inclined groove to the first inclined groove.

[0008] By adopting the above technical solution, the movement speed of the second molding rod is faster than that of the molding slider when the mold is opened, so that the second molding groove can first move away from the end of the reinforcing rib away from the plastic body, and then the main body of the reinforcing rib will be separated from the molding slider as the molding slider moves, completing the secondary demolding of the reinforcing rib, reducing the probability of the reinforcing rib being broken or stretched during demolding. When the mold is closed, the second inclined surface pushes the second molding rod to move and reset, thereby driving the second molding groove to move and reset.

[0009] Preferably, a top block is slidably connected to the molding slider, and a molding area is provided on one side end of the top block; a first chamber is provided in the molding slider, and the end of the top block without the molding 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, and when there is no external force, the third spring presses the matching block 1 against the cavity wall of the first cavity close to the limit plate; a first driving mechanism is also provided in the molding 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 molding slider.

[0010] By adopting the above technical solution, when the mold is opened, the first driving mechanism drives the ejector block to move out of the sliding block, so that the ejector block lifts the decorative strip. Thus, when the reinforcing rib disengages from the first forming groove, the second forming groove, and the first forming rod disengages from the assembly hole, the separation of these components is assisted, preventing the decorative strip from being excessively deformed by tension during the movement of the forming block and reducing the risk of the decorative strip breaking. Moreover, the setting of the ejector block enables the special-shaped buckle to be demolded last, separating the demolding of the reinforcing rib and the special-shaped buckle, realizing multi-stage demolding, which can also reduce the risk of the decorative strip breaking during the demolding of the reinforcing rib and the special-shaped buckle.

[0011] Preferably, the first driving mechanism includes a second chamber opened in the forming slider, a second matching block slidably connected in the second chamber, a third inclined surface and a fourth inclined surface opened at both end portions on both sides of the second matching block, a fifth inclined surface opened on the first matching block, and a sixth inclined surface opened on the second forming rod. The first chamber communicates with the second chamber. The second matching block is located between the first matching block and the second forming rod. The third inclined surface abuts against the fifth inclined surface, and the fourth inclined surface abuts against the sixth inclined surface; the elastic force of the second spring is greater than the elastic force of the third spring.

[0012] By adopting the above technical solution, when the mold is opened, the second spring rebounds to push the main body of the second forming rod to move closer to the limiting plate. At this time, the second forming rod will press the second matching block into the first chamber. When the second matching block moves into the first chamber, it will push the first matching block to move, causing the first matching block to move away from the limiting plate and the third spring to be compressed. When the first matching block moves away from the limiting plate, it will drive the ejector 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 to move away from the limiting plate, making the second forming groove close to the first forming groove. When the second forming rod moves back to its original position, the pressing on the second matching block is cancelled, and the third spring rebounds to drive the first matching block and the ejector block to move back toward the limiting plate. When the first matching block moves back to its original position, it will push the second matching block into the second chamber and also drive the ejector block to move back to its original position together.

[0013] Preferably, the ejector block includes a first block body, two second block bodies, and a second driving assembly. A third chamber communicating with the first chamber is opened in the forming slider. The first block body is slidably connected in the third chamber. One end of the first block body extends into the first chamber, and the first matching block is connected to the first block body; the two second block bodies are respectively slidably connected to one end of the first block body away from the limiting plate. The forming area includes a first area and a second area. The first area is opened on one of the second block bodies, and the second area is opened on the other second block body; the second driving assembly is used to control the sliding of the two second block bodies; in the mold closed state, the first block body and the two second block bodies are located in the third chamber, the two second block bodies abut against each other, and the first area and the second area communicate with each other to form the forming area.

[0014] 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 to move away from each other, releasing the undercut structure of the special-shaped buckle forming area, so that the special-shaped buckle can be demolded smoothly without forced demolding, thereby reducing the probability of breakage of the special-shaped buckle during demolding.

[0015] 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 a side of the two second blocks close to each other, the two seventh inclined surfaces are respectively opened on a side of the two second blocks away from each other, and both ends of the fourth spring are respectively inserted into the two mounting holes. The elastic force of the fourth spring is smaller than the elastic force of the third spring, and the fourth spring always drives the two second blocks away from each other.

[0016] 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 to move 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 sliding force of the first block is converted into the power for the two second blocks to move closer to each other through the cooperation of the two seventh inclined surfaces and the cavity opening of the third cavity, 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.

[0017] The technical effects of the present invention are mainly reflected in the following aspects: 1. The present invention provides a multi-stage demoulding structure to reduce the risk of product breakage during demoulding; 2. The present invention arranges a top block to press against the decorative edge when the molding slider slides, thereby preventing the decorative edge from being deformed too much under pressure and reducing the risk of the decorative edge breaking when demoulding; 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

[0018] Figure 1 It is a structural schematic diagram of the mold of this application.

[0019] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle and upper mold body.

[0020] Figure 3 yes Figure 1 Schematic diagram of the structure when a forming slider is removed from the middle and lower mold bodies.

[0021] Figure 4 It is a schematic structural diagram of the forming slider in the mold closing state.

[0022] Figure 5 It is Figure 4 a schematic structural diagram of the forming slider in another angle in

[0023] Figure 6 It is Figure 1 a schematic structural diagram of the fixed template and one forming slider in

[0024] Figure 7 It is Figure 6 a partial enlarged view at position A in

[0025] Figure 8 It is Figure 4 a sectional view of the forming slider along line B - B in

[0026] Figure 9 It is Figure 4 a sectional view of the forming slider along line C - C in

[0027] Figure 10 It is Figure 8 a partial enlarged view at position D in

[0028] Figure 11 It is Figure 9 a partial enlarged view at position E in

[0029] Figure 12 It is a schematic structural diagram of each component when the mold is in the mold opening state Figure 8 in

[0030] Figure 13 It is a schematic structural diagram of each component when the mold is in the fully open mold state Figure 8 in

[0031] Figure 14 It is a schematic structural diagram of the plastic part.

[0032] Figure 15 It is Figure 14 a partial enlarged view at position F in

[0033] Figure 16 It is Figure 1 an actual product picture of the mold in

[0034] Figure 17 It is Figure 2 an actual product picture of the upper mold body in

[0035] Figure 18 It is Figure 3 an actual product picture of the lower mold body during processing in

[0036] Figure 19 Yes Figure 3 Actual product picture after the processing of the lower die body in Reference numerals: 1. Upper die body; 11. Fixed template; 111. Cavity; 112. Inclined rod; 113. First inclined plane; 114. Second inclined plane; 2. Lower die body; 21. Movable template; 211. Core; 3. Forming slider; 31. First forming groove; 32. Forming area; 321. First area; 322. Second area; 33. Inclined groove; 34. First forming rod; 35. Limiting plate; 36. First spring; 37. Second forming rod; 38. Second forming groove; 39. Second spring; 4. Ejector block; 41. First block; 42. Second block; 51. First chamber; 52. First mating block; 53. Third spring; 6. First driving mechanism; 61. Second chamber; 62. Second mating block; 63. Third inclined plane; 64. Fourth inclined plane; 65. Fifth inclined plane; 66. Sixth inclined plane; 7. Second driving 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. Reinforcing rib; 94. Assembly hole. Specific embodiments

[0037] The present invention will be further described in detail below with reference to the accompanying drawings, so that the technical solutions of the present application are easier to understand and master.

[0038] Refer to Figures 1 - 3 , a special-shaped buckle strong ejection structure of a plastic injection mold in this embodiment includes an upper die body 1 and a lower die body 2. The upper die body 1 includes a fixed template 11, and a cavity 111 is provided on the fixed template 11. The lower die body 2 includes a movable template 21, and a core 211 is provided on the movable template 21. The core 211 and the cavity 111 can simultaneously form four plastic part bodies 9 when the mold is closed.

[0039] Refer to Figures 2 - 7 , four forming sliders 3 for forming decorative strips 91 are slidably connected in the core 211. Inclined grooves 33 are formed on all four forming sliders 3, and four inclined rods 112 matching the inclined grooves 33 are fixed on the cavity 111. The power of mold opening and closing is converted into the power of the forming slider 3 to slide through the cooperation of the inclined rod 112 and the inclined groove 33. When the mold is closed, the inclined rod 112 is inserted into the inclined groove 33, driving the forming slider 3 to slide close to the A area on the core 211 for forming the decorative strip 91. When the mold is opened, the inclined rod 112 moves out of the inclined groove 33, driving the forming slider 3 away from the formed decorative strip 91.

[0040] Refer to Figure 3 , Figure 4 and Figure 8, a limiting plate 35 is fixed on the forming slider 3. Meanwhile, a first forming groove 31 for forming the main body of the reinforcing rib 93 is formed on one surface of the forming slider 3. The limiting plate 35 and the first forming groove 31 are respectively located on both sides of the forming slider 3. A second forming rod 37 is slidably connected in the forming slider 3. A second forming groove 38 is formed on one end face 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 for forming the end of the reinforcing rib 93 away from the plastic part body 9.

[0041] Refer to 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 limiting plate 35, and the second forming groove 38 is located in the forming slider 3.

[0042] Refer to Figures 5 - 7 , four second inclined surfaces 114 are formed on the cavity 111. When the mold is closed, the four first inclined surfaces 113 will respectively contact the four second forming rods 37. The slope of the second inclined surface 114 is smaller than the slope of the inclined groove 33, so that when the mold is opened, the second forming rod 37 moves faster than the forming slider 3. When the mold is in the closed state, the second inclined surface 114 will move to abut against one end of the second forming rod 37 extending out of the forming slider 3, and gradually push the second forming rod 37 into the forming slider 3, so that the second spring 39 is compressed by force and the second forming groove 38 moves to communicate with the first forming groove 31.

[0043] Refer to Figure 4 , Figures 8 - 10 , a first chamber 51 and a third chamber 8 are formed in the forming slider 3, and the first chamber 51 is communicated with the third chamber 8. A top block 4 is slidably connected in the third chamber 8. A forming area 32 for forming the special-shaped buckle 92 is formed on the top block 4. The top block 4 includes a first block body 41. One end of the first block body 41 extends into the first chamber 51 and is fixedly connected with a first matching block 52. The first matching block 52 is slidably connected in the second chamber 61.

[0044] Refer to Figure 10 , a third spring 53 is placed in the first chamber 51. The third spring 53 is sleeved outside the first block body 41. The elastic force of the third spring 53 always acts on the first matching block 52. When the mold is in the closed state, the third spring 53 presses the first matching block 52 against the chamber wall of the first chamber 51 far from the third chamber 8.

[0045] Refer to Figures 8 - 10, the top block 4 further includes two second blocks 42 which are slidably connected to one end of the first block 41 away from the first chamber 51. In this embodiment, the two second blocks 42 are slidably engaged with the first block 41 in the manner of dovetail blocks and dovetail grooves, and the sliding directions of the two second blocks 42 are 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 formed on one of the second blocks 42, and the second area 322 is formed on the other second block 42. In the mold closed state, the first block 41 and the two second blocks 42 are located in the third chamber 8, the two second blocks 42 are in contact with each other, and the first area 321 and the second area 322 are communicated with each other to form the molding area 32.

[0046] Referring to Figures 8 - 10 , a first driving mechanism 6 is further provided in the molding slider 3. The first driving mechanism 6 is used to drive the mating block one 52 to move away from the limiting plate 35, so that the two second blocks 42 move out of the third chamber 8. The first driving mechanism 6 includes a second chamber 61 opened on the molding slider 3, a mating block two 62 slidably connected in the second chamber 61, third inclined surfaces 63 and fourth inclined surfaces 64 opened on both ends of the mating block two 62, a fifth inclined surface 65 opened on the mating block one 52, and a sixth inclined surface 66 opened on the second molding rod 37.

[0047] Referring to Figures 8 - 10 , the first chamber 51 is communicated with the second chamber 61. The mating block two 62 is located between the mating block one 52 and the second molding 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. The force transmission between the mating block one 52 and the mating block two 62 is realized through the cooperation of the third inclined surface 63 and the fifth inclined surface 65; the force transmission between the second molding rod 37 and the mating block two 62 is realized through the cooperation of the fourth inclined surface 64 and the sixth inclined surface 66; the elastic force of the second spring 39 is greater than the elastic force of the third spring 53 to ensure that the second molding rod 37 returns to its original position when the mold is opened.

[0048] Referring to Figures 8 - 10 , when the mold is in the open state, the second molding rod 37 moves to press the mating block two 62 into the first chamber 51, so that the mating block two 62 drives the mating block one 52 to move away from the chamber wall of the first chamber 51 close to the limiting plate 35, and the third spring 53 is compressed by the force; when the mold is in the closed state, the third spring 53 presses against the chamber wall of the first chamber 51 close to the limiting plate 35, and the mating block two 62 is located in the second chamber 61.

[0049] Referring to Figures 8 - 11, the top block 4 further includes a second driving component 7 for controlling the sliding of the two second blocks 42. The second driving component 7 includes four mounting holes 71 respectively formed on the two second blocks 42, two seventh inclined surfaces 72 respectively formed on the two second blocks 42, and two fourth springs 73. The two mounting holes 71 are respectively formed on the surfaces of the two second blocks 42 close to each other, and the two seventh inclined surfaces 72 are respectively formed on the surfaces of the two second blocks 42 far from each other.

[0050] Refer to Figures 8 - 11 , wherein two mounting holes 71 are respectively formed on each second block 42, and the two mounting holes 71 on each second block 42 are arranged in pairs opposite to each other. The two ends of the two fourth springs 73 are respectively inserted into the two opposite mounting holes 71. The elastic force of the two fourth springs 73 is less than the elastic force of the third spring 53, and the two fourth springs 73 always drive the two second blocks 42 to move away from each other.

[0051] Refer to Figure 8 , Figure 10 , Figure 12 , Figure 13 , when the two second blocks 42 gradually move out of the third chamber 8, the two fourth springs 73 rebound to drive the two second blocks 42 to move away from each other. When the two second blocks 42 move into the third chamber 8, the two seventh inclined surfaces 72 will move to abut against the orifice of the third chamber 8. Through the cooperation of the two seventh inclined surfaces 72 and the orifice of the third chamber 8, the force for the first block 41 to slide is converted into the force for the two second blocks 42 to move closer to each other, and the two second springs 39 are compressed by the force.

[0052] Refer to 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 first matching block 52, the first block 41, 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 for forming the assembly hole 94, and the end of the first forming rod 34 far from the forming area 32 passes through the limiting plate 35 and extends out of the forming slider 3.

[0053] Refer to Figures 4 - 8 , a first spring 36 is arranged in the forming slider 3. The first spring 36 is sleeved outside the first forming rod 34. The first spring 36 is located between the first chamber 51 and the limiting 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 formed on the cavity 111, and the four first inclined surfaces 113 will respectively abut against the four first forming rods 34 when the mold is closed.

[0054] Refer to Figures 4 - 8, when the mold is in the open mold state, the first spring 36 presses the first forming rod 34 against the limiting plate 35, and one end of the first forming rod 34 close to the forming area 32 is located outside the forming area 32; when the mold is in the closed mold state, the first inclined surface 113 will move to abut against one end of the first forming rod 34 extending out of the forming slider 3, and gradually push the first forming rod 34 into the forming slider 3, so that the first spring 36 is compressed by force, and the end of the first forming rod 34 for forming the assembly hole 94 moves 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 moving speed of the first forming rod 34 is greater than the moving speed of the forming slider 3.

[0055] Referring to Figures 4 - 13 , the complete injection molding and demolding process of the mold of the present application is as follows: First, the injection molding machine controls the lower mold body 2 to move upward toward the upper mold body 1 to close the mold. When the mold is closed, the four inclined rods 112 are inserted into the four inclined grooves 33 to drive the four forming sliders 3 to slide. At the same time, the four first inclined surfaces 113 and the four second inclined surfaces 114 move to abut against the four first forming rods 34 and the four second forming rods 37 respectively, and push the four first forming rods 34 and the four second forming rods 37 to move into the corresponding forming sliders 3 respectively.

[0056] 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, and finally the second forming groove 38 is docked with the first forming groove 31 to prepare for the forming of the reinforcing rib 93. When the second forming rod 37 moves back to its original position, the pressing on the second fitting block 62 will be cancelled, and the third spring 53 rebounds to drive the first fitting block 52, the first block 41 and the two second blocks 42 to move toward the limiting plate 35. When the first fitting block 52 moves back to its original position, it will push the second fitting block 62 into the second chamber 61.

[0057] When the first block 41 and the two second blocks 42 move toward the limiting plate 35, the first block 41 and the two second blocks 42 will move into the third chamber 8. In this process, through the cooperation of the two seventh inclined surfaces 72 and the orifice of the third chamber 8, the force of the sliding of the first block 41 is converted into the force of the two second blocks 42 moving closer to each other, so that the two second blocks 42 move closer to each other. Finally, the two second blocks 42 completely move into the third chamber 8, and the two second blocks 42 abut against each other, and the first area 321 and the second area 322 are connected to form the forming area 32. When the first forming rod 34 moves into the forming slider 3, it will extend into the forming area 32, thus preparing for the forming of the assembly hole 94.

[0058] After the mold is closed, the injection molding machine injects molten plastic into the mold, and four plastic part bodies 9 will be formed simultaneously between the core 211 and the cavity 111. After the injection molding of the four plastic part bodies 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.

[0059] During the process of the lower mold body 2 moving away from the upper mold body 1, the inclined rod 112 will be pulled out of the inclined groove 33, driving the forming slider 3 to move away from the formed decorative strip 91 and the reinforcing rib 93. During the mold opening process, the cavity 111 will also move away from the core 211, gradually canceling the pressing of the four first inclined surfaces 113 against the four first forming rods 34 and the pressing of the four second inclined surfaces 114 against the four second forming rods 37. When the pressing of the first inclined surface 113 against the first forming rod 34 is gradually canceled, the first spring 36 will rebound to drive the first forming rod 34 to move out of the assembly hole 94, releasing the reverse buckle structure between the assembly hole 94 and the first forming rod 34.

[0060] When the pressing of the second inclined surface 114 against the second forming rod 37 is canceled, the second spring 39 rebounds to drive the main body of the second forming rod 37 towards the limiting plate 35, so that the second forming groove 38 can move away from the end of the reinforcing rib 93 of the plastic part body 9 faster than the forming slider 3. Then, as the forming slider 3 moves, the main body of the reinforcing rib 93 will disengage from the forming slider 3, completing the secondary demolding of the reinforcing rib 93 and reducing the probability of the reinforcing rib 93 breaking and being strained during demolding.

[0061] When the main body of the second forming rod 37 moves close to the limiting plate 35, the second forming rod 37 will press the second mating block 62 into the first chamber 51. When the second mating block 62 moves into the first chamber 51, it will push the first mating block 52 to move, causing the first mating block 52 to move away from the limiting plate 35 and the third spring 53 to be compressed. When the first mating block 52 moves away from the limiting plate 35, it will drive the first block 41 and the two second blocks 42 to move out of the third chamber 8.

[0062] When the two second blocks 42 move out of the third chamber 8, they will push up the decorative strip 91, so as to prevent the decorative strip 91 from being overly deformed by tension and reduce the risk of the decorative strip 91 breaking when the reinforcing rib 93 disengages from the first forming groove 31, the second forming groove 38, and the first forming rod 34 disengages from the assembly hole 94.

[0063] Subsequently, as the two second blocks 42 move, the two seventh inclined surfaces 72 will move to abut against the orifice of the third chamber 8. Subsequently, as the two second blocks 42 continue to move, the fourth spring 73 will rebound to drive the two second blocks 42 to move away from each other, releasing the reverse buckle structure between the special-shaped buckle 92 and the forming area 32. So that the special-shaped buckle 92 does not need to be forcibly demolded.

[0064] After the reverse buckle structure between the special-shaped buckle 92 and the forming area 32 is released, the two second blocks 42 will move away from the special-shaped buckle 92 together with the forming slider 3, so that the two second blocks 42 do not interfere with the ejection path of the special-shaped buckle 92 when the plastic part is ejected from the core 211, enabling the plastic part to be smoothly demolded.

[0065] Of course, the above are only typical examples of this application. In addition, this application can also have many other specific implementation manners. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by this 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), the upper mold body (1) comprising a fixed mold plate (11), the fixed mold plate (11) is provided with a mold cavity (111), the lower mold body (2) comprises a movable mold plate (21), the movable mold plate (21) is provided with a mold core (211), characterized in that: A molding slide block (3) for molding a decorative strip (91) is slidably connected in the mold core (211), and a first molding groove (31) for molding a reinforcing rib (93) and a molding area (32) for molding a special-shaped buckle (92) are provided on the molding slide block (3); an inclined groove (33) is provided on the molding slide block (3), and an inclined rod (112) matched with the inclined groove (33) is provided on the mold cavity (111), and the power of opening and closing the mold is converted into the power of sliding the molding slide block (3) through the cooperation between the inclined rod (112) and the inclined groove (33); a first molding rod (34) is slidably connected to the molding slide block (3), and one end of the first molding rod (34) extends into the molding area (32) for molding an assembly hole (94), and a limit plate (35) is provided on the molding slide block (3) ), 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) moves to abut against one end of the first forming rod (34) extending out of the forming slider (3), and gradually pushes the first forming rod (34) into the forming slider (3), so that the first forming rod (34) extends into the first forming rod (34) of the forming area.

2. A plastic injection mold special-shaped buckle strong release structure according to claim 1, characterized in that: A second molding rod (37) is slidably connected in the molding slide block (3), a second molding groove (38) is provided on an end surface of one end of the second molding rod (37), the other end of the second molding rod (37) passes through the limiting plate (35) and extends out of the molding slide block (3), and the second molding groove (38) is used to mold the end of the reinforcing rib (93) away from the plastic part body (9); a second spring (39) is provided in the molding slide block (3), the elastic force of the second spring (39) acts on the second molding rod (37), and a second inclined surface (114) is provided on the mold 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 molding rod (37) extending out of the molding slide block (3), and gradually pushes the second molding rod (37) into the molding slide block (3), so that the second inclined groove (38) is connected to the first inclined groove (37).

3. A plastic injection mold special-shaped buckle strong release structure according to claim 2, characterized in that: A top block (4) is slidably connected to the molding slide block (3), and a molding area (32) is provided on one end of the top block (4); a first chamber (51) is provided in the molding slide block (3), and an end of the top block (4) without the molding area (32) extends into the first chamber (51), and a matching block (52) is provided on one end of the top block (4) extending into the first chamber (51); 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), and when no external force is applied, the third spring (53) presses the matching block (52) against the cavity wall of the first chamber (51) close to the limiting plate (35); a first driving mechanism (6) is also provided in the molding slide block (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) comprises 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) is in contact with the fifth inclined surface (65); and the fourth inclined surface (64) is in contact with the sixth inclined surface (66); 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: The top block (4) comprises a first block (41), two second blocks (42), and a second driving assembly (7); a third chamber (8) communicating with the first chamber (51) is provided on the molding slide block (3); 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); a 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 molding area (32) comprises A first area (321) and a second area (322), wherein 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); the second driving component (7) is used to control the sliding of the two second blocks (42); when the mold is in a closed state, the first block (41) and the two second blocks (42) are located in the third chamber (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 opened on the two second blocks (42), two seventh inclined surfaces (72) respectively opened on the two second blocks (42), and a fourth spring (73). The two mounting holes (71) are respectively opened on the sides of the two second blocks (42) close to each other, and the two seventh inclined surfaces (72) are respectively opened on the sides of the two second blocks (42) away from each other. The two ends of the fourth spring (73) are respectively inserted into the two mounting holes (71). The elastic force of the fourth spring (73) is smaller 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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