Quick injection type air-mark-free automobile front bumper lower trim plate mold

Abstract

The utility model provides a quick-injection type air-mark-free automobile front bumper lower trim plate mold, and belongs to the field of injection molds. The mold comprises a fixed mold plate and a movable mold plate, a mold core is arranged on the movable mold plate, the two ends of the mold core are movably arranged on end blocks on the movable mold plate respectively, during mold closing, a forming cavity is formed among the fixed mold plate, the mold core and the two end blocks, a plurality of mold core ejection blocks are arranged on the mold core, and the mold core ejection blocks are arranged on the mold core. A plurality of mold core ejection blocks and an end block are arranged on the fixed mold plate and are all connected with an ejection structure, an injection molding splitter plate is arranged on the fixed mold plate and is communicated with two injection molding pipes, and the two injection molding pipes penetrate through the fixed mold plate and are communicated with the molding cavity.

Description

Technical Field

[0001] The utility model belongs to the field of injection molds, in particular to a fast-injection air mark-free automobile front bumper lower trim mold. Background Art

[0002] When manufacturing large plastic parts, the cores used to form them are large and long, with complex surface structures and multiple grooves. During the demolding process, the plastic part is partially formed within these grooves, and there is a strong adhesion between the plastic part and the grooves. Although straight ejectors can be evenly distributed on the molding surface, due to the large size of the plastic part and the strong adhesion between the plastic part and the molding surface, traditional molds usually use ejectors to eject the plastic part during the demolding process. However, using only ejectors can result in insufficient ejection force or uneven ejection force, which can easily cause the plastic part to distort and deform, leading to molding failure and reduced product qualification rate.

[0003] For example, a Chinese patent document discloses a trash can injection mold [patent application number: CN201922187226.8], which includes a movable mold and a fixed mold, wherein a mold core is provided on the movable mold, and a mold cavity is provided on the fixed mold, and a mold cavity for molding the trash can is formed between the mold core and the mold cavity, and a gate connected to the mold cavity is provided on the side of the fixed mold facing away from the movable mold; a discharge assembly is provided on the movable mold at the root of the mold core, and the discharge assembly is assembled to be able to eject the trash can on the mold core toward the direction of the fixed mold when the movable mold is separated from the fixed mold. However, since the molded trash can is relatively long, the adhesion force between the trash can and the inner wall of the molding cavity is very large. During the demolding process, the traditional ejector ejection method using a push rod is very likely to cause the trash can to break, thereby reducing the product qualification rate. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and provide a fast injection type air mark-free automobile front bumper lower decorative plate mold.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A fast-injection, air-mark-free automobile front bumper lower trim mold comprises a fixed mold plate and a movable mold plate. The movable mold plate is provided with a core, and both ends of the core are movably provided with end blocks on the movable mold plate. When the mold is closed, a molding cavity is formed between the fixed mold plate, the core, and the two end blocks. The core is provided with a plurality of core ejector blocks, and the plurality of core ejector blocks and end blocks are all connected to an ejection structure. The fixed mold plate is provided with an injection manifold, and the injection manifold is connected to two injection pipes. The two injection pipes pass through the fixed mold plate and are connected to the molding cavity.

[0007] In the above-mentioned fast-injection, air-mark-free automobile front bumper lower trim mold, several linear actuators are provided on the outer surface of the movable platen or the outer surfaces on both sides of the core, the ejection structure is slidably arranged in the movable platen, the output shaft end of the linear actuator is connected to the ejection structure, and the ejection structure includes several ejector rods slidably connected to the movable platen, and the several ejector rods are connected to several core ejector blocks and end blocks.

[0008] In the above-mentioned fast-injection air mark-free automobile front bumper lower trim mold, the core ejector block is divided into an inclined ejector block and a straight ejector block, and the ejector rod is divided into a straight ejector rod and an inclined ejector rod.

[0009] In the above-mentioned fast-injection, air-mark-free automobile front bumper lower trim mold, the ejection structure includes a straight top connecting plate and an inclined top connecting plate, the straight ejector rod is fixed on the straight top connecting plate, the inclined ejector rod is rotatably set on the inclined top connecting plate, the inclined top connecting plate is located on the side of the straight top connecting plate close to the molding cavity, the straight ejector rod and the inclined ejector rod slide through the inclined top connecting plate, the output shafts of several linear drives are connected to the straight top connecting plate, and the output shafts of the remaining linear drives are connected to the inclined top connecting plate.

[0010] In the above-mentioned fast-injection, air-mark-free automobile front bumper lower trim mold, four linear drives are provided on the outer surface of the movable template or the outer surfaces on both sides of the core and are placed diagonally in pairs. The output shafts of one pair of diagonally placed two linear drives are connected to the straight top connecting plate, and the output shafts of the other pair of diagonally placed two linear drives are connected to the inclined top connecting plate.

[0011] In the above-mentioned fast-injection air mark-free automobile front bumper lower trim mold, the end block is connected to the straight push rod, and the end block inclined push block is slidably connected inside the end block, and the end block inclined push block is connected to the inclined push rod.

[0012] In the above-mentioned fast-injection air mark-free automobile front bumper lower trim mold, a plurality of inclined ejector rods are placed one by one in opposition along the center line of the core.

[0013] In the above-mentioned fast-injection air mark-free automobile front bumper lower trim mold, the two injection tubes are located at the center line of the core and are close to both sides of the core.

[0014] In the above-mentioned fast-injection air mark-free automobile front bumper lower trim mold, the core is provided with a bumper lower trim groove, and the opening of the bumper lower trim groove is arranged upward.

[0015] In the above-mentioned fast-injection air-mark-free automobile front bumper lower trim mold, the straight top connecting plate and the inclined top connecting plate are convexly provided with a placement block, a placement groove is provided in the placement block, and the output shaft end of the linear drive is provided with a connection block placed in the placement groove.

[0016] Compared with the existing technology, the advantages of this utility model are:

[0017] 1. During the ejection process, the core ejector block and the end block can move upward to support the plastic part and separate it from the adhesive connection with the movable platen. The core ejector block is used to support the middle part of the plastic part, and the two end blocks are used to support the two ends of the plastic part respectively, so that the ejection force on the plastic part is evenly distributed, preventing the plastic part from being twisted and deformed due to insufficient ejection force or uneven ejection force distribution.

[0018] 2. During the ejection process of the plastic part, all the linear actuators work simultaneously, causing the straight ejector plate and the inclined ejector plate to move synchronously, thereby ejecting the plastic part through the core ejector block and the end block. Then the linear actuator connected to the straight ejector plate stops working, while the linear actuator connected to the inclined ejector plate continues working, causing the inclined ejector plate to continue moving, causing the direction of the inclined ejector rod to change, causing the inclined ejector block to move horizontally, causing the plastic part to fall off and complete demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure;

[0020] Figure 2 yes Figure 1 A schematic cross-sectional view in one direction;

[0021] Figure 3 It is a structural diagram of a fixed template;

[0022] Figure 4 yes Figure 1 A schematic cross-sectional view from another direction;

[0023] Figure 5 It is a structural diagram of the dynamic template.

[0024] In the figure: fixed template 10, movable template 11, core 12, end block 13, molding cavity 14, core ejector block 15, injection manifold 16, injection tube 17, linear drive 18, ejector rod 19, straight ejector connecting plate 20, inclined ejector connecting plate 21, end block inclined ejector block 22, bumper lower trim decorative groove 23, placement block 24, placement groove 25, connecting block 26. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] The utility model provides a fast injection type air mark-free automobile front bumper lower trim mold, combined with Figure 1-5As shown, it includes a fixed template 10 and a movable template 11, the movable template 11 is provided with a core 12, and the two ends of the core 12 are movably provided with end blocks 13 on the movable template 11. When the mold is closed, a molding cavity 14 is formed between the fixed template 10, the core 12 and the two end blocks 13. A plurality of core ejector blocks 15 are provided on the core 12, and the plurality of core ejector blocks 15 and the end blocks 13 are all connected to the ejection structure. An injection diverter plate 16 is provided on the fixed template 10, and the injection diverter plate 16 is connected to two injection tubes 17. The two injection tubes 17 pass through the fixed template 10 and are connected to the molding cavity 14.

[0027] In this embodiment, since the mold is used to produce the lower trim panel of an automobile front bumper, the molded part has a large area, and therefore the molding cavity 14 has a large area. The injection liquid is diverted through two injection tubes 17, enabling rapid injection into the molding cavity 14 and effectively preventing the part from splitting or twisting due to uneven cooling rates during the molding process. Furthermore, during the ejection process, both the core ejector block 15 and the end blocks 13 can move upward to support the part and release it from the adhesive connection with the movable plate 11. The core ejector block 15 is used to support the middle portion of the part, and the two end blocks 13 are used to support the ends of the part, respectively. This ensures that the ejection force applied to the part is evenly distributed, preventing the part from twisting and deforming due to insufficient or uneven ejection force.

[0028] Several linear drives 18 are provided on the outer surface of the movable template 11 or the outer surfaces on both sides of the core 12. The ejection structure is slidably arranged in the movable template 11. The output shaft end of the linear drive 18 is connected to the ejection structure. The ejection structure includes several ejector rods 19 slidably connected to the movable template 11. Several ejector rods 19 are connected to several core ejector blocks 15 and end blocks 13.

[0029] In this embodiment, during the demolding process, after the movable mold plate 11 is separated from the fixed mold plate 10, the linear drive 18 retracts its output shaft, causing the ejection structure to move with the ejector pin 19 toward the direction close to the plastic part, thereby moving the core ejector block 15 and the end block 13 to eject the plastic part.

[0030] The core ejector block 15 is divided into an inclined ejector block and a straight ejector block, and the ejector rod 19 is divided into a straight ejector rod and an inclined ejector rod.

[0031] In this embodiment, the straight ejector rod is used to eject the plastic part upward. After the plastic part is ejected and disconnected from the core 12, the inclined ejector rod can provide lateral force for demolding the core ejector block 15 and the end block 13, thereby completing the demolding of the plastic part.

[0032] The ejection structure includes a straight top connecting plate 20 and an inclined top connecting plate 21. The straight ejector rod is fixed on the straight top connecting plate 20, and the inclined ejector rod is rotatably set on the inclined top connecting plate 21. The inclined top connecting plate 21 is located on the side of the straight top connecting plate 20 close to the molding cavity 14. The straight ejector rod and the inclined ejector rod slide through the inclined top connecting plate 21. The output shafts of several linear drivers 18 are connected to the straight top connecting plate 20, and the output shafts of the remaining linear drivers 18 are connected to the inclined top connecting plate 21.

[0033] In this embodiment, during the process of ejecting the plastic part, all the linear drivers 18 work simultaneously, so that the straight top connecting plate 20 and the inclined top connecting plate 21 move synchronously, thereby ejecting the plastic part through the core ejector block 15 and the end block 13. Then the linear driver 18 connected to the straight top connecting plate 20 stops working, and the linear driver 18 connected to the inclined top connecting plate 21 continues to work, so that the inclined top connecting plate 21 continues to move, the direction of the inclined ejector rod changes, and the inclined ejector block moves horizontally, so that the plastic part falls off and the demolding is completed.

[0034] Four linear drives 18 are provided on the outer surface of the movable template 11 or the outer surfaces on both sides of the core 12 and are placed diagonally in pairs. The output shafts of one pair of diagonally placed two linear drives 18 are connected to the straight top connecting plate 20, and the output shafts of the other pair of diagonally placed two linear drives 18 are connected to the inclined top connecting plate 21.

[0035] In this embodiment, the diagonally placed linear actuators 18 are connected to corresponding connecting plates, so that the movement of the connecting plates is more stable.

[0036] The end block 13 is connected to the straight push rod, and an end block inclined push block 22 is slidably connected in the end block 13, and the end block inclined push block 22 is connected to the inclined push rod.

[0037] In this embodiment, the end block 13 also has an end block inclined ejector block 22 with an inclined ejector function. During the demolding process, the lateral movement of the end block inclined ejector block 22 allows the two ends of the plastic part to be smoothly disconnected from the end block 13. Cooperating with the inclined ejector block in the core ejector block 15, each part of the plastic part can be smoothly demolded laterally during the demolding process.

[0038] Several inclined ejectors are placed one by one in opposition along the center line of the core 12.

[0039] The two injection tubes 17 are located at the center line of the core 12 and close to two sides of the core 12 respectively.

[0040] In this embodiment, the injection liquid flows into the molding cavity 14 through the injection tube 17 and flows along the center line of the core 12 toward both sides of the molding cavity 14 for injection molding.

[0041] The core 12 is provided with a bumper lower panel decorative groove 23 , and the opening of the bumper lower panel decorative groove 23 is arranged upward.

[0042] The straight top connecting plate 20 and the inclined top connecting plate 21 are protrudingly provided with a placement block 24 , a placement groove 25 is provided in the placement block 24 , and the output shaft end of the linear drive 18 is provided with a connection block 26 placed in the placement groove 25 .

[0043] The working principle of the present invention is as follows: during the injection molding process, the injection liquid flows into the molding cavity 14 through the injection tube 17 and flows along the center line of the core 12 to both sides of the molding cavity 14 for injection molding. During the demolding process, after the movable plate 11 is separated from the fixed plate 10, all the linear actuators 18 operate simultaneously, causing the straight top connecting plate 20 and the inclined top connecting plate 21 to move synchronously, thereby ejecting the plastic part through the core ejector block 15 and the end block 13. Then, the linear actuator 18 connected to the straight top connecting plate 20 stops working, while the linear actuator 18 connected to the inclined top connecting plate 21 continues working, causing the inclined top connecting plate 21 to continue to move, causing the inclined top connecting plate 21 to change direction, causing the inclined ejector block to move laterally, causing the plastic part to fall off and complete demolding.

[0044] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0045] Although this article uses the fixed template 10, the movable template 11, the core 12, the end block 13, the molding cavity 14, the core top block 15, the injection diverter plate 16, the injection molding tube 17, the linear drive 18, the ejector rod 19, the straight top connecting plate 20, the inclined top connecting plate 21, the end block inclined top block 22, the bumper lower trim decorative groove 23, the placement block 24, the placement groove 25, the connecting block 26, etc. more frequently, these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restriction is contrary to the spirit of the present invention.

Claims

1. A fast injection type air mark-free automobile front bumper lower trim mold, comprising a fixed mold plate (10) and a movable mold plate (11), characterized in that: The movable plate (11) is provided with a core (12), and the two ends of the core (12) are movably arranged on end blocks (13) on the movable plate (11). When the mold is closed, a molding cavity (14) is formed between the fixed plate (10), the core (12) and the two end blocks (13). The core (12) is provided with a plurality of core top blocks (15), and the plurality of core top blocks (15) and the end blocks (13) are all connected to the ejection structure. The fixed plate (10) is provided with an injection molding manifold (16), and the injection molding manifold (16) is connected to two injection molding pipes (17). The two injection molding pipes (17) pass through the fixed plate (10) and are connected to the molding cavity (14).

2. The fast injection type air mark-free automobile front bumper lower trim mold according to claim 1, characterized in that: A plurality of linear actuators (18) are provided on the outer surface of the movable plate (11) or the outer surfaces on both sides of the core (12); the ejection structure is slidably arranged in the movable plate (11); the output shaft end of the linear actuator (18) is connected to the ejection structure; the ejection structure includes a plurality of ejector rods (19) slidably connected to the movable plate (11); and the plurality of ejector rods (19) are connected to a plurality of core ejector blocks (15) and end blocks (13).

3. The fast injection type air mark-free automobile front bumper lower trim mold according to claim 2, characterized in that: The core ejector block (15) is divided into an inclined ejector block and a straight ejector block, and the ejector rod (19) is divided into a straight ejector rod and an inclined ejector rod.

4. The fast injection type air mark-free automobile front bumper lower trim mold according to claim 3, characterized in that: The ejection structure includes a straight top connecting plate (20) and an inclined top connecting plate (21), the straight top rod is fixed on the straight top connecting plate (20), the inclined top rod is rotatably set on the inclined top connecting plate (21), the inclined top connecting plate (21) is located on the side of the straight top connecting plate (20) close to the molding cavity (14), the straight top rod and the inclined top rod slide through the inclined top connecting plate (21), the output shafts of several linear drivers (18) are connected to the straight top connecting plate (20), and the output shafts of the remaining linear drivers (18) are connected to the inclined top connecting plate (21).

5. The fast injection type air mark-free automobile front bumper lower trim mold according to claim 4, characterized in that: Four linear drivers (18) are provided on the outer surface of the movable plate (11) or the outer surfaces on both sides of the core (12) and are placed diagonally in pairs, wherein the output shafts of a pair of diagonally placed two linear drivers (18) are connected to a straight top connecting plate (20), and the output shafts of another pair of diagonally placed two linear drivers (18) are connected to an inclined top connecting plate (21).

6. The fast injection type air mark-free automobile front bumper lower trim mold according to claim 5, characterized in that: The end block (13) is connected to the straight push rod, and an end block inclined push block (22) is slidably connected in the end block (13), and the end block inclined push block (22) is connected to the inclined push rod.

7. The fast injection type air mark-free automobile front bumper lower trim mold according to claim 6, characterized in that: A plurality of inclined ejector rods are placed one by one in opposition along the center line of the core (12).

8. The fast injection type air mark-free automobile front bumper lower trim mold according to claim 1, characterized in that: The two injection tubes (17) are located at the center line of the core (12) and are close to both sides of the core (12).

9. The fast injection type air mark-free automobile front bumper lower trim mold according to claim 1, characterized in that: The core (12) is provided with a bumper lower trim plate decorative groove (23), and the opening of the bumper lower trim plate decorative groove (23) is arranged upward.

10. The fast injection type air mark-free automobile front bumper lower trim mold according to claim 5, characterized in that: The straight top connecting plate (20) and the inclined top connecting plate (21) are protrudingly provided with a placement block (24), a placement groove (25) is provided in the placement block (24), and the output shaft end of the linear drive (18) is provided with a connection block (26) placed in the placement groove (25).

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