A secondary delayed injection mold structure for a front panel

Abstract

The utility model relates to a secondary delayed injection mold structure of a front panel, comprising an upper mold body and a lower mold body, wherein the upper mold body comprises an upper fixed plate, a flow channel plate, a fixed mold plate, and a hot runner arranged in the flow channel plate, and the lower mold body comprises a movable mold plate, two mold feet, a first top plate, a second top plate, and a lower fixed plate, wherein a first molding cavity for molding a first plate body and two second molding cavities for molding a second plate body are formed between the fixed mold plate and the movable mold plate, and a first sequence needle valve and a second sequence needle valve are arranged on the hot runner, wherein a discharge port of the first sequence needle valve is connected to the first molding cavity, and a plastic flow channel is formed between the fixed mold plate and the movable mold plate, wherein two channel ports of the plastic flow channel are respectively connected to the first molding cavity, and a discharge port of the second sequence needle valve is connected to the plastic flow channel. The utility model ensures the smooth molding of the second plate body by delaying the opening of the second sequence needle valve.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to a secondary delayed injection mold structure of a front panel. Background Art

[0002] A front panel such as Figure 1 As shown, it is a plastic part, which is produced by injection molding. The front panel includes a first plate body 71 and two second plate bodies 72. The angle between the two second plate bodies 72 and the first plate body 71 is close to 90 degrees, which makes the molding cavity for molding the second plate bodies 72 on the mold deep and narrow, which makes it difficult for the hot melt plastic to fill the molding cavity for molding the second plate bodies 72 during mold injection. Utility Model Content

[0003] The present application provides a front panel secondary delayed injection mold structure, which ensures the smooth molding of the second plate body by delaying the opening of the second sequence needle valve.

[0004] The present application provides a front panel secondary delayed injection mold structure adopting the following technical solution:

[0005] A front panel secondary delayed injection mold structure comprises an upper mold body and a lower mold body, the upper mold body comprises an upper fixed plate, a runner plate, a fixed mold plate, and a hot runner arranged in the runner plate, the lower mold body comprises a movable mold plate, two mold feet, a first top plate, a second top plate, and a lower fixed plate, a first molding cavity for molding the first plate body and two second molding cavities for molding the second plate body are formed between the fixed mold plate and the movable mold plate, the first molding cavity and the two second molding cavities are connected to each other, a first sequence needle valve and a second sequence needle valve are provided on the hot runner, a discharge port of the first sequence needle valve is connected to the first molding cavity, a plastic flow channel is formed between the fixed mold plate and the movable mold plate, two channel ports of the plastic flow channel are respectively connected to the first molding cavity, the two flow channel ports of the plastic flow channel are respectively close to the two second molding cavities, and the discharge port of the second sequence needle valve is connected to the plastic flow channel.

[0006] By adopting the above technical solution, when the front panel is injection molded, the first sequence needle valve is first opened to allow the hot melt plastic to flow into the first molding cavity to complete the molding of the first top plate. After the first sequence needle valve is opened for 1.6 seconds, the hot melt plastic flowing out of the first sequence needle valve will flow to the junction of the first molding cavity and the two second molding cavities. At this time, the second sequence needle valve is opened, so that the hot melt plastic in the second sequence needle valve flows into the junction of the first molding cavity and the second molding cavity through the plastic flow channel. At this time, the two streams of heat-capable plastic will merge and flow into the two second molding cavities together. Under the pressure of the first sequence needle valve and the second sequence needle valve, the two streams of hot melt plastic can easily fill the two second molding cavities and complete the molding of the two second plate bodies. At the same time, setting two sequence needle valves will provide sufficient holding pressure during the pressure holding process of the front panel injection molding, reduce the shrinkage of the first plate body and the two second plate bodies, and make the first plate body and the two second plate bodies more fully molded.

[0007] Preferably, the plastic flow channel includes a first flow channel opened on the movable template and two second flow channels opened on the fixed template, the two second flow channels are respectively located above the flow channel openings at both ends of the first flow channel, one end of the two second flow channels are connected to the first flow channel, the other ends of the two second flow channels are respectively connected to the first molding cavity and respectively close to the two second molding cavities, and the discharge port of the second sequential needle valve is connected to the first flow channel.

[0008] By adopting the above technical solution, the hot melt plastic flowing out of the second sequence needle valve will first collide with the side walls of the two ends of the first flow channel, and then the hot melt plastic flow rate will be reduced before entering the first molding cavity through the two second flow channels. If the hot melt plastic flows too fast into the first molding cavity, a jetting phenomenon will occur. The ejected hot melt plastic will bend like a snake along the flow direction, and cool rapidly after contacting the mold surface. It cannot be well integrated with other hot melt plastics, causing flow marks to appear on the second plate body. Therefore, the two second flow channels and the first flow channel are staggered to reduce the probability of flow marks on the surface of the front panel. At the same time, this setting can keep the second sequence needle valve in a high-pressure injection state to a certain extent, without worrying about the problem of product surface flow marks caused by high-pressure injection. The second sequence needle valve maintains a high-pressure injection state, which can make the product have a higher pressure during pressure holding, ensuring the saturation of product molding and reducing product shrinkage.

[0009] Preferably, the first flow channel includes two L-shaped branch channels, one end of the two branch channels are connected to each other, and the other ends of the two branch channels are respectively connected to two second flow channels, the two second flow channels are respectively located above one end of the two branch channels away from each other, and the outlet of the second sequential needle valve is connected to the connecting point of the two branch channels.

[0010] By adopting the above technical solution, when the hot melt plastic flows in the two branch channels, the flow rate will be reduced when passing through the bends of the two branch channels, further reducing the probability of flow marks on the surface of the front panel.

[0011] Preferably, a first cold material hole is opened on one end of the two branch channels away from each other, and the two first cold material holes are respectively located below the two second flow channels. A second cold material hole is opened at the connecting point of the two branch channels, and the second cold material hole is located below the discharge port of the second sequential needle valve. Three pulling rods are provided on the second top plate, and the top ends of the three pulling rods extend into the two first cold material holes and the second cold material hole respectively.

[0012] By adopting the above technical solution, there is a time interval for the injection molding of each front center net product. During this period, the temperature of the hot melt plastic at the outlet of the second-order needle valve will decrease, resulting in poor fluidity. Therefore, the second cold material hole is set so that the hot melt plastic with a lower temperature at the outlet of the second-order needle valve directly enters the second cold material hole, and the hot melt plastic with a lower temperature is not allowed to participate in the molding of the front center net. At the same time, when the hot melt plastic flows in the two branch channels, the hot melt plastic at the front end will contact the fixed mold plate and the movable mold plate to become cold material. This part of the material will flow into the two first cold material holes when flowing, and it will not be allowed to participate in the molding of the front center net. Therefore, the two first cold material holes and the second cold material holes can reduce the cold material participating in the molding of the first plate body and the second plate body, and ensure the molding quality of the first plate body and the second plate body.

[0013] Preferably, the flow channel openings of the two branch flow channels interconnected with the first molding cavity are both fan-shaped flow channel openings, and the widths of the two fan-shaped flow channel openings gradually decrease from one end close to the first molding cavity to one end far from the first molding cavity.

[0014] By adopting the above technical solution, the first plate body and the second plate body are both flat parts, which will generate relatively large stress after injection molding to cause the product to deform. The provision of a fan-shaped flow channel can enhance the pressure holding effect of the product, thereby effectively eliminating the residual stress of the product and preventing product deformation.

[0015] Preferably, the movable template is slidably connected with multiple inclined ejector rods for pushing the formed first plate body out of the movable template, the top ends of the multiple inclined ejector rods are provided with forming blocks, the multiple forming blocks are located in the first forming cavity, the bottom ends of the multiple inclined ejector rods are connected with sliding seats, the multiple sliding seats are slidably connected to the second top plate, the movable template is slidably connected with two ejector blocks for respectively pushing the two formed second plate bodies out of the movable template, the top ends of the two ejector blocks are respectively located in the two second forming cavities, the bottom ends of the two ejector blocks are respectively connected with two connecting rods, and the ends of the two connecting rods away from the corresponding ejector blocks are fixed to the second top plate.

[0016] By adopting the above technical solution, after the first plate body and the two second plate bodies are formed, the injection molding machine will open the mold so that the lower mold body moves away from the upper mold body, and then the injection molding machine will drive multiple inclined ejector rods, multiple molding blocks, four connecting rods, and two ejector blocks to move together and close to the upper mold body by pushing the first ejector plate and the second ejector plate. When the multiple molding blocks and the two ejector blocks move, they will push the first plate body and the two second plate bodies out of the mold plate to complete the demolding of the product.

[0017] Preferably, a first receiving hole is provided on a surface of the second top plate facing the first top plate, and a limit block is provided in each of the four first receiving holes. A through hole penetrating the second top plate is provided on the top wall of each of the four first receiving holes, and the diameter of the first receiving hole is larger than the diameter of the through hole. The bottom ends of the four connecting rods extend into the four through holes respectively and respectively conflict with the four limit blocks, and the four limit blocks are provided with a connecting portion, which is used to connect the connecting rod and the limit block

[0018] By adopting the above technical solution, the connecting rod and the limit block are connected through the connecting part, so that the first plate body and the second plate body can move together with the connecting rod. At the same time, the above structure makes it more convenient to assemble the connecting rod to the second plate body. The connecting rod and the limit block can be assembled before the mold is assembled. When the mold is assembled, the connecting rod can be directly passed through the second top plate from the first receiving hole, eliminating the traditional manual grinding and matching assembly method, saving a lot of assembly time.

[0019] Preferably, the connecting part includes a bolt, a first threaded hole formed on the limit block and cooperating with the bolt, and a second threaded hole formed on the bottom surface of the connecting rod and cooperating with the bolt, and the bolt is threadedly connected in the first threaded hole and the second threaded hole in sequence.

[0020] By adopting the above technical solution, the connection rod and the limit block can be fixedly connected by threading the bolt into the first threaded hole and the second threaded hole.

[0021] The technical effects of this utility model are mainly reflected in the following aspects:

[0022] 1. The utility model ensures the smooth forming of the second plate by sequentially delaying the opening of two sequential needle valves;

[0023] 2. The utility model is equipped with an ingenious flow channel structure to ensure the molding quality of the product;

[0024] 3. The installation of the connecting rod of the utility model adopts a new assembly structure to cancel the traditional manual assembly method, saving a lot of assembly time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the front panel.

[0026] Figure 2 It is a structural schematic diagram of the mold of this application.

[0027] Figure 3 It is a structural diagram of the hot runner and the lower mold body.

[0028] Figure 4 It is a structural schematic diagram of the lower mold body.

[0029] Figure 5 yes Figure 4 A partial enlarged view of point A in the middle.

[0030] Figure 6 It is a structural diagram of a fixed template.

[0031] Figure 7 yes Figure 6 A partial enlarged view of point B in the middle.

[0032] Figure 8 It is a partial cross-sectional view of the fixed template and the movable template.

[0033] Fig. 9 yes Figure 8 A partial enlarged view of point C in the middle.

[0034] Fig.10 It is a structural schematic diagram of the first top plate, the second top plate, the inclined top rod and other components.

[0035] Fig.11 yes Figure 4 Cross-sectional view of the middle and lower mold bodies along line DD.

[0036] Fig.12 yes Fig.11 A partial enlarged view of point E in the middle.

[0037] Fig.13 It is a structural exploded diagram of the connecting rod, limit block and connecting part.

[0038] Reference numerals: 1, upper mold body; 11, upper fixed plate; 12, runner plate; 13, fixed mold plate; 14, hot runner; 141, first sequence needle valve; 142, second sequence needle valve; 2, lower mold body; 21, movable mold plate; 22, mold foot; 23, first top plate; 24, second top plate; 241, first accommodating hole; 242, through hole; 25, lower fixed plate; 31, first molding cavity; 32, second molding cavity; 4, plastic runner; 41 , first flow channel; 411, branch flow channel; 42, second flow channel; 421, fan-shaped flow channel outlet; 51, first cold material hole; 52, second cold material hole; 53, pull rod; 54, inclined ejector rod; 55, forming block; 56, sliding seat; 57, ejector block; 58, connecting rod; 59, limit block; 6, connecting part; 61, bolt; 62, first threaded hole; 63, second threaded hole; 71, first plate body; 72, second plate body; 8, nitrogen spring. DETAILED DESCRIPTION

[0039] 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.

[0040] Reference Figure 2 and Fig.10 A front panel secondary delayed injection mold structure 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 runner plate 12, a fixed mold plate 13, and a hot runner 14 installed in the runner plate 12. The lower mold body 2 includes a movable mold plate 21, two mold feet 22, a first top plate 23, a second top plate 24, and a lower fixed plate 25, wherein the two mold feet 22 are fixed on both ends of the lower fixed plate 25, the movable mold plate 21 is fixed on two mold rubbers, and the first top plate 23 and the second top plate 24 are fixedly connected to each other, and the first top plate 23 is located between the second top plate 24 and the lower fixed plate 25. A plurality of guide pillars are also fixedly connected between the movable mold plate 21 and the lower fixed plate 25, and the first top plate 23 and the second top plate 24 are slidably connected to the plurality of guide pillars along the mold opening direction of the mold. A plurality of nitrogen springs 8 are also fixedly connected to the side of the second top plate 24 facing the movable mold plate 21.

[0041] Reference Figure 3-Figure 9 A first molding cavity 31 for molding the first plate body 71 and two second molding cavities 32 for molding the second plate body 72 are formed between the fixed mold plate 13 and the movable mold plate 21, and the first molding cavity 31 and the two second molding cavities 32 are connected to each other. A plastic flow channel 4 is also formed between the fixed mold plate 13 and the movable mold plate 21, and the plastic flow channel 4 includes a first flow channel 41 opened on the movable mold plate 21 and two second flow channels 42 opened on the fixed mold plate 13, wherein the first flow channel 41 includes two L-shaped branch flow channels 411, and one end of the two branch flow channels 411 is connected to each other.

[0042] Reference Figure 3-Figure 9, the two second flow channels 42 are respectively located above the ends of the two branch flow channels 411 that are not connected, one end of the two second flow channels 42 is respectively connected to the two branch flow channels 411, and the other ends of the two second flow channels 42 are respectively connected to the first molding cavity 31 and are respectively close to the two second molding cavities 32. The flow channel openings of the two branch flow channels 411 and the first molding cavity 31 that are connected to each other are both fan-shaped flow channel openings 421, and the widths of the two fan-shaped flow channel openings 421 are gradually reduced from the end close to the first molding cavity 31 to the end far from the first molding cavity 31.

[0043] Reference Figure 3-Figure 9 A first cold material well 51 is provided at one end of the two runners 411 away from each other. The two first cold material wells 51 are respectively located below the two second runners 42. A second cold material well 52 is provided at the connection point of the two runners 411. The second cold material well 52 is located below the discharge port of the second sequence needle valve 142. Three pulling rods 53 are provided on the second top plate 24. The top ends of the three pulling rods 53 extend into the two first cold material wells 51 and the second cold material well 52 respectively. A first sequence needle valve 141 and a second sequence needle valve 142 are provided on the hot runner 14. The discharge port of the first sequence needle valve 141 is connected to the first molding cavity 31. The discharge port of the second sequence needle valve 142 is connected to the connection point of the two runners 411 and is located above the second cold material well 52.

[0044] Reference Figure 4 and Fig.10 The movable template 21 is slidably connected with a plurality of inclined ejector rods 54 for ejecting the formed first plate body 71 out of the movable template 21, the top ends of the plurality of inclined ejector rods 54 are fixedly connected with a forming block 55, the plurality of forming blocks 55 are all located in the first forming cavity 31, the bottom ends of the plurality of inclined ejector rods 54 are fixedly connected with a sliding seat 56, and the plurality of sliding seats 56 are slidably connected to the second top plate 24 along a mold opening direction perpendicular to the mold.

[0045] Reference Figure 4 , Figure 10-12 The movable template 21 is also slidably connected with two top blocks 57 along the mold opening direction of the mold, which are used to respectively push the two second plate bodies 72 to be formed out of the movable template 21. The top ends of the two top blocks 57 are respectively located in the two second molding cavities 32, and the bottom ends of the two top blocks 57 are respectively fixedly connected with two connecting rods 58.

[0046] Reference Fig.11 , Fig.12A first receiving hole 241 is provided on the surface of the second top plate 24 facing the first top plate 23, and a limit block 59 is provided in each of the four first receiving holes 241. A through hole 242 penetrating the second top plate 24 is provided on the top wall of the four first receiving holes 241. The diameter of the first receiving hole 241 is larger than the diameter of the through hole 242. The bottom ends of the four connecting rods 58 extend into the four through holes 242 respectively and conflict with the four limit blocks 59 respectively.

[0047] Reference Figure 11-13 The four limit blocks 59 are all provided with a connecting portion 6, which is used to connect the connecting rod 58 and the limit block 59. The connecting portion 6 includes a bolt 61, a first threaded hole 62 provided on the limit block 59 and matched with the bolt 61, and a second threaded hole 63 provided on the bottom surface of the connecting rod 58 and matched with the bolt 61. The bolt 61 is threadedly connected in the first threaded hole 62 and the second threaded hole 63 in sequence.

[0048] Reference Figure 2-Figure 13 The specific injection molding process of the front panel of this application is as follows:

[0049] First, the injection molding machine controls the mold to close the mold, and then injects hot-melt plastic into the hot runner 14 , and then opens the first sequence needle valve 141 to allow the hot-melt plastic to flow into the first molding cavity 31 to complete the molding of the first top plate 23 . 1.6 seconds after the first sequence needle valve 141 is opened, the hot-melt plastic flowing out of the first sequence needle valve 141 will flow to the junction of the first molding cavity 31 and the two second molding cavities 32 .

[0050] At this time, the second sequence needle valve 142 is opened, so that the hot melt plastic in the second sequence needle valve 142 flows into the connection of the two branch channels 411, and then the hot melt plastic flows along the two branch channels 411, and then the hot melt plastic first collides with the side walls of the ends of the two branch channels 411, and then the hot melt plastic flow rate is reduced and then enters the first molding cavity 31 through the two second channels 42. If the hot melt plastic enters the first molding cavity 31 at a too fast flow rate, a jetting phenomenon will occur, and the ejected hot melt plastic will bend forward like a snake along the flow direction, and cool rapidly after contacting the mold surface, and cannot be well integrated with other hot melt plastics, resulting in flow marks on the second plate body 72. Therefore, the two second channels 42 and the first channel 41 are staggered to reduce the probability of flow marks on the surface of the front panel.

[0051] The two streams of hot-melt plastic will merge at the junction of the first molding cavity 31 and the second molding cavity 32 and flow into the two second molding cavities 32 together. Under the pressure of the first sequence needle valve 141 and the second sequence needle valve 142, the two streams of hot-melt plastic can easily fill the two second molding cavities 32 and complete the molding of the two second plates 72.

[0052] After the first plate body 71 and the two second plate bodies 72 are injection molded, the injection molding machine opens the mold so that the lower mold body 2 moves away from the upper mold body 1, and then the injection molding machine drives the multiple inclined ejector rods 54, four connecting rods 58, and two ejector blocks 57 to move together and move close to the upper mold body 1 by pushing the first ejector plate 23 and the second ejector plate 24. When the first ejector plate 23 and the second ejector plate 24 move, the multiple nitrogen springs 8 are compressed. When the multiple inclined ejector rods 54 and the two ejector blocks 57 move, the first plate body 71 and the two second plate bodies 72 are pushed out of the movable template 21, completing the demoulding of the product.

[0053] Then the injection molding machine cancels the driving of the first top plate 23 and the second top plate 24, and the multiple nitrogen springs 8 will rebound and move the first top plate 23, the second top plate 24, the multiple inclined ejector rods 54, the multiple molding blocks 55, and the two ejector blocks 57 to reset. Then the mold controls the lower mold body 2 to move toward the upper mold body 1, so that the upper mold body 1 and the lower mold body 2 are molded together, and then the new front grille can be injection molded.

[0054] 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 front panel secondary delayed injection mold structure, comprising an upper mold body (1) and a lower mold body (2), wherein the upper mold body (1) comprises an upper fixed plate (11), a flow channel plate (12), a fixed mold plate (13), and a hot runner (14) arranged in the flow channel plate (12), and the lower mold body (2) comprises a movable mold plate (21), two mold feet (22), a first top plate (23), a second top plate (24), and a lower fixed plate (25), wherein a first molding cavity (31) for molding a first plate body (71) and two second molding cavities (32) for molding a second plate body (72) are formed between the fixed mold plate (13) and the movable mold plate (21), wherein the first molding cavity (31) and the two second molding cavities (32) are connected to each other, and characterized in that: The hot runner (14) is provided with a first sequence needle valve (141) and a second sequence needle valve (142); the discharge port of the first sequence needle valve (141) is connected to the first molding cavity (31); a plastic flow channel (4) is formed between the fixed mold plate (13) and the movable mold plate (21); the two channel ports of the plastic flow channel (4) are respectively connected to the first molding cavity (31); the two flow channel ports of the plastic flow channel (4) are respectively close to the two second molding cavities (32); and the discharge port of the second sequence needle valve (142) is connected to the plastic flow channel (4).

2. A front panel secondary delayed injection mold structure according to claim 1, characterized in that: The plastic flow channel (4) comprises a first flow channel (41) opened on the movable mold plate (21) and two second flow channels (42) opened on the fixed mold plate (13); the two second flow channels (42) are respectively located above the flow channel openings at both ends of the first flow channel (41); one end of the two second flow channels (42) are both connected to the first flow channel (41); the other ends of the two second flow channels (42) are respectively connected to the first molding cavity (31) and are respectively close to the two second molding cavities (32); the discharge port of the second sequential needle valve (142) is connected to the first flow channel (41).

3. A front panel secondary delayed injection mold structure according to claim 2, characterized in that: The first flow channel (41) includes two L-shaped branch channels (411), one end of the two branch channels (411) are connected to each other, and the other end of the two branch channels (411) are respectively connected to two second flow channels (42), the two second flow channels (42) are respectively located above one end of the two branch channels (411) that are away from each other, and the discharge port of the second sequential needle valve (142) is connected to the connection point of the two branch channels (411).

4. A front panel secondary delayed injection mold structure according to claim 3, characterized in that: A first cold material hole (51) is provided at one end of the two branch channels (411) away from each other, and the two first cold material holes (51) are respectively located below the two second channels (42). A second cold material hole (52) is provided at the connecting point of the two branch channels (411), and the second cold material hole (52) is located below the discharge port of the second sequential needle valve (142). Three pulling rods (53) are provided on the second top plate (24), and the top ends of the three pulling rods (53) extend into the two first cold material holes (51) and the second cold material hole (52), respectively.

5. The front panel secondary delayed injection mold structure according to claim 3, characterized in that: The flow channel openings of the two branch flow channels (411) that are interconnected with the first molding cavity (31) are both fan-shaped flow channel openings (421), and the widths of the two fan-shaped flow channel openings (421) gradually decrease from one end close to the first molding cavity (31) to the end far from the first molding cavity (31).

6. The front panel secondary delayed injection mold structure according to claim 1, characterized in that: The movable template (21) is slidably connected to a plurality of inclined ejector rods (54) for ejecting the formed first plate body (71) out of the movable template (21); the top ends of the plurality of inclined ejector rods (54) are each provided with a forming block (55); the plurality of forming blocks (55) are each located in the first forming cavity (31); the bottom ends of the plurality of inclined ejector rods (54) are each connected to a sliding seat (56); the plurality of sliding seats (56) are each slidably connected to the second top plate (24) The movable template (21) is slidably connected with two top blocks (57) for respectively pushing the two second plate bodies (72) to be formed out of the movable template (21), the top ends of the two top blocks (57) are respectively located in the two second forming cavities (32), and the bottom ends of the two top blocks (57) are respectively connected with two connecting rods (58), and the ends of the two connecting rods (58) away from the corresponding top blocks (57) are fixed on the second top plate (24).

7. A front panel secondary delayed injection mold structure according to claim 6, characterized in that: A first receiving hole (241) is provided on a surface of the second top plate (24) facing the first top plate (23), and a limit block (59) is provided in each of the four first receiving holes (241). A through hole (242) penetrating the second top plate (24) is provided on the top wall of each of the four first receiving holes (241), and the diameter of the first receiving hole (241) is larger than the diameter of the through hole (242). The bottom ends of the four connecting rods (58) respectively extend into the four through holes (242) and respectively contact the four limit blocks (59), and the four limit blocks (59) are provided with a connecting portion (6), and the connecting portion (6) is used to connect the connecting rod (58) and the limit block (59).

8. The front panel secondary delayed injection mold structure according to claim 7, characterized in that: The connecting portion (6) comprises a bolt (61), a first threaded hole (62) provided on the limiting block (59) and cooperating with the bolt (61), and a second threaded hole (63) provided on the bottom surface of the connecting rod (58) and cooperating with the bolt (61); the bolt (61) is threadedly connected in the first threaded hole (62) and the second threaded hole (63) in sequence.

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