Plastic front middle net injection molding mold

Abstract

The utility model relates to a plastic front middle net injection molding mould, including an upper mould body and a lower mould body, the lower mould body includes a lower fixed plate, a first top plate, a second top plate, two mould feet and a movable mould plate, the movable mould plate is provided with a mould core for molding a front middle net body, and one side of the movable mould plate facing the lower fixed plate is provided with a plurality of chutes communicated with the mould core. The multiple sliding grooves are internally connected with angle ejector rods in a sliding mode, the second ejector plate is connected with multiple angle ejector sliding bases in a sliding mode, the bottom ends of the multiple angle ejector rods are connected with the multiple angle ejector sliding bases correspondingly, and the multiple angle ejector rods are provided with first forming blocks. First forming cavities used for forming first buckles are formed between the first forming blocks and the sliding grooves, and second forming blocks used for forming first assembly holes are arranged on the multiple first forming blocks. When the front middle net body is demolded, the inverted buckle structure of the first buckle and the second forming block is removed, so that the front middle net body can be demolded smoothly.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to a plastic front grille injection molding mold. Background Art

[0002] A plastic front net such as Figure 1 As shown, it includes a front grille body 9, a plurality of first buckles 91 and two second buckles 92 are provided at the bottom of the front grille body 9, a first assembly hole 93 is provided on the plurality of first buckles 91, and a second assembly hole 94 is provided on the two second buckles 92.

[0003] The front grille body 9 is a plastic part, which needs to be produced by injection molding using a mold. However, after the front grille body 9 is injection molded on the mold, the molded part used to form the first assembly hole 93 will be inserted into the first assembly hole 93 and form an inverted structure with the first clip 91, thereby affecting the demolding of the front grille body 9. Therefore, in order to achieve smooth demolding of the front grille body 9, it is necessary to release the first clip 91 and the inverted structure of the molded part used to form the first assembly hole 93 when the front grille body 9 is demolded. Utility Model Content

[0004] The present application provides a plastic front grille injection molding mold, which releases the undercut structure of the first clip and the second molding block when the front grille body is demoulded, so that the front grille body can be demoulded smoothly.

[0005] The present application provides a plastic front grille injection molding mold that adopts the following technical solution:

[0006] A plastic front grille injection molding mold comprises an upper mold body and a lower mold body, the lower mold body comprises a lower fixed plate, a first top plate, a second top plate, two mold feet, and a movable mold plate, the movable mold plate is provided with a core for molding a front grille body, a surface of the movable mold plate facing the lower fixed plate is provided with a plurality of slide grooves connected to the core, a plurality of the slide grooves are slidably connected with inclined ejector rods, a plurality of inclined ejector slide seats are slidably connected on the second top plate, the bottom ends of a plurality of the inclined ejector rods are respectively connected to a plurality of inclined ejector slide seats, a first molding block is provided on a plurality of the inclined ejector rods, a first molding cavity for molding a first buckle is formed between the first molding block and the sliding groove, and a plurality of the first molding blocks are provided with a second molding block for molding a first assembly hole.

[0007] By adopting the above technical solution, after the front center grille body is injection molded on the mold, the injection molding machine controls the first top plate and the second top plate to move toward the dynamic template. During this process, under the guidance of multiple slide grooves, multiple inclined ejector rods will move toward the upper mold body. During the movement of the multiple inclined ejector rods, the front center grille body will be ejected from the core, and at the same time, the multiple first molding blocks will be moved away from the multiple already formed first buckles, and the multiple second molding blocks will be moved out of the multiple second assembly holes, thereby releasing the undercut structure of the first buckles and the second molding blocks, so that the front center grille body can be demolded smoothly.

[0008] Preferably, exhaust grooves are provided on the surfaces of the plurality of second molding blocks facing the first molding cavity, and the plurality of exhaust grooves are respectively located on one side of the plurality of second molding blocks close to the second top plate.

[0009] By adopting the above technical solution, the first molding cavity is very deep and the cavity opening is small. Therefore, when the hot-melt plastic flows into the first molding cavity, air is easily trapped in the first molding cavity, which makes the first buckle not fully punched during molding and easily causes the molded first buckle to burn. Therefore, an exhaust groove is provided so that when the hot-melt plastic fills the first molding cavity, the air in the first molding cavity can enter the exhaust groove without hindering the hot-melt plastic from filling the first molding cavity, thereby preventing the first buckle from being fully punched and effectively solving the problem of air being easily trapped in the first molding cavity.

[0010] Preferably, a connecting portion is provided between the plurality of second forming blocks and the plurality of first forming blocks, and the connecting portion is used to connect the second forming blocks and the first forming blocks.

[0011] By adopting the above technical solution, the second forming block will basically be deformed after the mold is molded for tens of thousands of times, affecting the molding accuracy of the first assembly hole, so it needs to be replaced. Traditionally, it is replaced together with the inclined ejector rod. This method requires the mold to be disassembled from the injection molding machine and the mold master to disassemble the mold on site for mold matching, which will increase the later maintenance cost of the mold. By setting the connection part, the second forming block can be replaced separately without replacing a new inclined ejector rod, which reduces costs and saves the work of mold matching.

[0012] Preferably, the connecting portion is a dovetail groove provided on the first forming block and a dovetail block provided on the second forming block, and the dovetail block is inserted into the dovetail groove.

[0013] By adopting the above technical solution, when the second molding block is replaced, the first top plate and the second top plate are controlled to move by the injection molding machine, so that the inclined ejector rod is in the ejection state. At this time, the first molding block and the second molding block are outside the slide groove, and then the dovetail block is pulled out of the dovetail groove by pulling the second molding block to remove the old second molding block from the first molding block, and then the new dovetail block is inserted into the dovetail groove to complete the installation of the new second molding block. In addition to completing the rapid replacement of the second molding block through the cooperation of the dovetail groove and the dovetail block, the mold can complete the replacement of the old and new second molding blocks on the injection molding machine without the need for the mold master to disassemble the mold, saving a lot of work.

[0014] Preferably, two second molding cavities for molding the second buckles are provided on the core, and two molding rods for molding the second assembly holes are slidably connected to the movable template, and the ends of the two molding rods extend into the two second molding cavities respectively. The movable template is also provided with a driving assembly for driving the two molding rods to slide.

[0015] By adopting the above technical solution, after the mold is closed, the driving component drives the two molding rods to move so that the two molding rods are inserted into the two second molding cavities so that the second assembly holes can be smoothly formed. After the front center grille body is injection molded, the driving component drives the two molding rods to move away from the two second molding cavities, so that the two molding rods are pulled out of the two second assembly holes, releasing the undercut structure of the two molding rods and the two second assembly holes, so that the front center grille body can be smoothly demolded.

[0016] Preferably, the driving assembly includes a fixed base block arranged on the movable template, a connecting block slidably connected to the fixed base block, and a driving part for driving the connecting block to move, and one end of the two forming rods away from the corresponding second assembly hole is connected to the connecting block.

[0017] By adopting the above technical solution, the effect of controlling the movement of the two forming rods can be achieved by using the driving unit to control the movement of the connecting block.

[0018] Preferably, a T-slot is provided on a surface of the connecting block facing the movable template, and a slider is provided on one end of the two forming rods away from the corresponding second assembly hole, and the slider is slidably connected in the T-slot along the length direction of the T-slot.

[0019] By adopting the above technical solution, the position of the two forming rods on the connecting block can be changed by adjusting the position of the slider in the T-slot, so that the two forming rods can be connected to the connecting block and the two forming rods can be smoothly inserted into the two second forming cavities.

[0020] Preferably, two mounting grooves are provided on the bottom wall of the core, and molding inserts are provided in the two mounting grooves, and two second molding cavities for molding the second buckles are formed between the two molding inserts and the two mounting grooves.

[0021] By adopting the above technical solution, the second molding cavity is small and deep. If it is directly molded by electric spark machining, the cost is high and the processing cycle is long. Therefore, the problem of difficult processing of the second molding cavity is solved by setting an insert. At the same time, the installation structure of the insert enables the cavity wall of the second molding cavity to be manually polished, thereby improving the surface accuracy of the cavity wall of the second molding cavity and reducing the probability of the second buckle breaking and straining when the front center grille body is demolded.

[0022] The technical effects of this utility model are mainly reflected in the following aspects:

[0023] 1. The utility model utilizes the ejection action of the inclined ejector rod to release the undercut structure of the first buckle and the second forming block, so that the front grille body can be demoulded smoothly

[0024] 2. The utility model facilitates the replacement of the second forming block through the cooperation of the dovetail groove and the dovetail block;

[0025] 3. The utility model controls two forming rods through a driving part and a connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the front grille body.

[0027] Figure 2 It is a structural schematic diagram of the mold of this application.

[0028] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle and lower mold.

[0029] Figure 4 It is a structural diagram of the dynamic template.

[0030] Figure 5 yes Figure 3 Cross-sectional view of the middle and lower mold bodies along line AA.

[0031] Figure 6 It is a schematic diagram of the structure of the drive component.

[0032] Figure 7 yes Figure 3 A partial enlarged view of point B in the middle.

[0033] Figure 8 yes Figure 3 Cross-sectional view of the middle and lower mold bodies along the CC line.

[0034] Fig. 9 It is a structural explosion diagram of the inclined ejector rod, the first forming block, the second forming block, and the connecting part.

[0035] Fig.10 It is a partial cross-sectional view of the first top plate, the second top plate, and the inclined top slide.

[0036] Reference numerals: 1, upper mold body; 11, upper fixed plate; 12, hot runner plate; 13, fixed mold plate; 2, lower mold body; 21, lower fixed plate; 22, first top plate; 23, second top plate; 231, sliding groove; 24, mold foot; 25, movable mold plate; 26, core; 27, sliding groove; 28, inclined ejector rod; 29, inclined ejector slide seat; 3, first molding block; 31, exhaust groove; 4, second molding block; 5, connecting portion ; 51. dovetail groove; 52. dovetail block; 61. second molding cavity; 62. molding rod; 63. slider; 7. drive assembly; 71. fixed base block; 72. connecting block; 721. T-slot; 73. drive unit; 81. mounting groove; 82. molding insert; 9. front center grille body; 91. first buckle; 92. second buckle; 93. first assembly hole; 94. second assembly hole; 10. first molding cavity. DETAILED DESCRIPTION

[0037] The present application is further described in detail below in conjunction with the accompanying drawings to make the technical solution of the present application easier to understand and grasp.

[0038] Reference Figure 2 A plastic front grille injection molding mold of this embodiment includes an upper mold body 1 and a lower mold body 2. The upper mold body 1 includes an upper fixed plate 11, a hot runner plate 12 and a fixed mold plate 13. The hot runner plate 12 is located between the upper fixed plate 11 and the fixed mold plate 13. The three plates are fixedly connected to each other by bolts, and a hot runner is installed in the hot runner plate 12. The lower mold body 2 includes a lower fixed plate 21, a first top plate 22, a second top plate 23, two mold feet 24, and a movable mold plate 25. The two mold feet 24 are fixedly connected to the two sides of the lower fixed plate 21, and the movable mold plate 25 is fixedly connected to the two mold rubbers. A plurality of guide rods are fixedly connected between the lower fixed plate 21 and the movable mold plate 25. The first top plate 22 and the second top plate 23 are respectively connected to the plurality of guide rods by sliding along the mold opening direction of the mold. The second bottom plate is located on the side of the first top plate 22 close to the movable mold plate 25.

[0039] Reference Figure 3-Figure 5 , Figure 7 The movable platen 25 is provided with a core 26 for forming the front grille body 9, and the bottom wall of the core 26 is provided with two mounting grooves 81, and the two mounting grooves 81 are both fixedly connected with a molding insert 82 by bolts, and two second molding cavities 61 for forming the second buckle 92 are formed between the two molding inserts 82 and the two mounting grooves 81. The movable platen 25 is also slidably connected with two molding rods 62 for forming the second assembly holes 94 along a mold opening direction perpendicular to the mold, and one end of the two molding rods 62 extends into the two second molding cavities 61 respectively, and the other end of the two molding rods 62 extends out of the movable platen 25.

[0040] Reference Figure 3 , Figure 5 and Figure 6 The movable platen 25 is also provided with a driving assembly 7 for driving the two forming rods 62 to slide. The driving assembly 7 includes a fixed base block 71 fixed on the movable plate, a connecting block 72 slidingly connected to the fixed base block 71 along the axial direction of the forming rod 62, and a driving part 73 for driving the connecting block 72 to move, wherein the driving part 73 is an oil cylinder, which is located on the side of the connecting block 72 away from the movable platen 25, and the piston rod of the oil cylinder is fixedly connected to the connecting rod.

[0041] Reference Figure 3 , Figure 5 and Figure 6 A T-slot 721 is provided on the surface of the connecting block 72 facing the movable template 25 in a direction perpendicular to the axis of the forming rod 62. A slider 63 is provided on the end of the two forming rods 62 away from the corresponding second assembly hole 94. The slider 63 is slidably connected in the T-slot 721 along the length direction of the T-slot 721.

[0042] Reference Figure 3 , Figure 4 , Figure 7-Figure 9 A plurality of slide grooves 27 connected to the core 26 are provided on the side of the movable template 25 facing the lower bottom plate, and inclined ejector rods 28 are slidably connected in the plurality of slide grooves 27. A first molding block 3 is fixed on the plurality of inclined ejector rods 28. A first molding cavity 10 for molding the first buckle 91 is formed between the first molding block 3 and the slide groove 231. The second molding blocks 4 for molding the first assembly hole 93 are detachably connected to the side of the plurality of first molding blocks 3 away from the inclined ejector rod 28 through a connecting portion 5. The connecting portion 5 is a dovetail groove 51 provided on the first molding block 3 and a dovetail block 52 provided on the second molding block 4. The dovetail block 52 is inserted into the dovetail groove 51 along the mold opening direction of the mold.

[0043] Reference Figure 3 , Figure 8 and Fig.10 A plurality of sliding T-shaped sliding grooves 231 are provided on the first top plate 22 on the side facing the second top plate 23. A plurality of inclined top slides 29 are slidably connected in the sliding grooves 231 along the mold opening direction perpendicular to the mold. The inclined top slides 29 are also T-shaped. The bottom ends of the plurality of inclined top rods 28 are respectively connected to the plurality of inclined top slides 29. The second top plate 23 is also fixedly connected to a plurality of ejectors, and the ends of the plurality of ejectors away from the second top plate 23 are all extended into the core 26.

[0044] Reference Figure 2-Figure 10 The complete injection molding process of the mold in this application is as follows:

[0045] First, the injection molding machine controls the upper mold body 1 and the lower mold body 2 to close the mold, and then the injection molding machine injects hot melt plastic into the hot runner, and then sends the hot melt plastic to the core 26 through the hot runner, so that the front grille body 9 is injection molded. After the front grille body 9 is injection molded, the injection molding machine controls the lower mold body 2 to move away from the upper mold body 1.

[0046] After the lower mold body 2 and the upper mold body 1 are completely separated, the piston rod of the driving part 73 retracts and moves the connecting block 72 away from the movable mold plate 25. When the connecting block 72 moves, it moves the two molding rods 62 away from the two second molding cavities 61, thereby pulling the two molding rods 62 out of the two second assembly holes 94, thereby releasing the inverted structure of the two molding rods 62 and the two second assembly holes 94.

[0047] After the lower mold body 2 stops moving, the injection molding machine controls the first top plate 22 and the second top plate 23 to move toward the movable mold plate 25. During this process, the multiple inclined top slides 29 slide to make the multiple inclined top rods 28 slide in the multiple slide grooves 27 and approach the upper mold body 1. At the same time, when the first top plate 22 and the second top plate 23 move toward the movable mold plate 25, the multiple ejectors will also move toward the upper mold body 1. During the movement of the multiple inclined top rods 28 and the multiple ejectors, the center net body will be ejected from the core 26 together. During the movement of the multiple inclined top rods 28, the multiple first molding blocks 3 will move away from the multiple first buckles 91 that have been formed, and the multiple second molding blocks 4 will move out of the multiple second assembly holes 94, thereby releasing the undercut structure of the first buckle 91 and the second molding block 4, so that the front center net body 9 can be demolded smoothly. After the front center net body 9 is completely ejected, the injection molding machine operator takes the formed front center net body 9 off the mold.

[0048] Then, the first top plate 22 and the second top plate 23 are controlled by the injection molding machine to move and reset, so that the multiple top rods and the multiple inclined top rods 28 are moved and reset, and the molding of the multiple first buckles 91 and the multiple second assembly holes 94 is completed. Then, the piston rod of the driving part 73 is extended, so that the connecting block 72 moves toward the movable plate 25. When the connecting block 72 moves, it will move with the two molding rods 62, so that the two molding rods 62 are inserted into the two second molding cavities 61, and the molding of the two second assembly holes 94 is completed. Then, the mold controls the lower mold body 2 to move toward the upper mold body 1 so that the two molds are closed, so that the new front grille body 9 can be re-injected.

[0049] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A plastic front grille injection molding mold, comprising an upper mold body (1) and a lower mold body (2), wherein the lower mold body (2) comprises a lower fixed plate (21), a first top plate (22), a second top plate (23), two mold feet (24), and a movable mold plate (25), wherein the movable mold plate (25) is provided with a core (26) for molding a front grille body (9), and wherein: A plurality of slide grooves (27) connected to the core (26) are provided on one surface of the movable template (25) facing the lower fixed plate (21); a plurality of the slide grooves (27) are slidably connected with inclined ejector rods (28); a plurality of inclined ejector slide seats (29) are slidably connected to the second ejector plate (23); the bottom ends of the plurality of inclined ejector rods (28) are respectively connected to the plurality of inclined ejector slide seats (29); a first molding block (3) is provided on the plurality of inclined ejector rods (28); a first molding cavity (10) for molding a first buckle (91) is formed between the first molding block (3) and the slide groove (231); a second molding block (4) for molding a first assembly hole (93) is provided on the plurality of the first molding blocks (3).

2. The plastic front grille injection molding mold according to claim 1, characterized in that: A plurality of second forming blocks (4) are each provided with an exhaust groove (31) on one side facing the first forming cavity (10), and the plurality of exhaust grooves (31) are respectively located on one side of the plurality of second forming blocks (4) close to the second top plate (23).

3. The plastic front grille injection molding mold according to claim 1, characterized in that: A connecting portion (5) is provided between the plurality of second forming blocks (4) and the plurality of first forming blocks (3), and the connecting portion (5) is used to connect the second forming block (4) and the first forming block (3).

4. The plastic front grille injection molding mold according to claim 3, characterized in that: The connecting portion (5) is a dovetail groove (51) provided on the first forming block (3) and a dovetail block (52) provided on the second forming block (4), and the dovetail block (52) is inserted into the dovetail groove (51).

5. The plastic front grille injection molding mold according to claim 1, characterized in that: The core (26) is provided with two second molding cavities (61) for molding second buckles (92); the movable template (25) is slidably connected with two molding rods (62) for molding second assembly holes (94); the ends of the two molding rods (62) extend into the two second molding cavities (61) respectively; the movable template (25) is also provided with a driving component (7) for driving the two molding rods (62) to slide.

6. The plastic front grille injection molding mold according to claim 5, characterized in that: The driving assembly (7) comprises a fixed base block (71) arranged on the movable template (25), a connecting block (72) slidably connected to the fixed base block (71), and a driving part (73) for driving the connecting block (72) to move. One end of the two forming rods (62) away from the corresponding second assembly hole (94) is connected to the connecting block (72).

7. The plastic front grille injection molding mold according to claim 6, characterized in that: A T-shaped slot (721) is provided on a surface of the connecting block (72) facing the movable platen (25), and a slider (63) is provided on one end of the two forming rods (62) away from the corresponding second assembly hole (94), and the slider (63) is slidably connected in the T-shaped slot (721) along the length direction of the T-shaped slot (721).

8. The plastic front grille injection molding mold according to claim 5, characterized in that: Two mounting grooves (81) are provided on the bottom wall of the core (26), and molding inserts (82) are provided in the two mounting grooves (81). Two second molding cavities (61) for molding second buckles (92) are formed between the two molding inserts (82) and the two mounting grooves (81).

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