Foamed plastic skeleton injection mold for automobile

Abstract

The utility model discloses a car foamed plastic framework injection mold, including lower mould and upper mould, the upper mould sets at the top of lower mould, the upper surface fixed mounting of lower mould has four positioning rods, the outer surface of positioning rod is sleeved with the upper mould, the upper surface of lower mould is opened with mould groove, the upper surface of upper mould is connected with injection pipe, injection pipe communicates with the bottom of upper mould, the inside of lower mould and upper mould is opened with cooling storehouse in common. The utility model discloses, through setting lower mould, upper mould, mould groove, cooling storehouse, sealing sleeve, connecting sleeve and connecting groove etc. the cooperation of parts, realized the function of the product in the injection mold to the cooling forming of quick, through using cooling water directly from the inside of mould to the cooling of mould and injection product, improves the cooling rate of mould and product, speeds up the forming speed of product, prevents cooling water from entering the mould cavity through sealing sleeve, connecting sleeve and connecting groove simultaneously, avoids the influence of injection product's quality.

Description

Technical Field

[0001] This utility model relates to the field of mold processing technology, and in particular to an injection mold for automotive foamed plastic skeleton. Background Technology

[0002] Injection molding is a method of shaping industrial products. Industrial products are usually made using rubber injection molding or plastic injection molding. Injection molding can also be divided into injection molding compression molding and die casting. Injection molding is generally achieved through injection molding machines, namely injection machines and injection molding machines. The foamed plastic frames on automobiles are all manufactured by injection molding compression molding. Most of them use injection molding machines and molds. The injection molding machine injects the molten plastic into the molding mold to make various shapes of foamed plastic frames for automobiles.

[0003] Patent publication number CN108189324A discloses an automotive injection mold, belonging to the field of mold processing technology. It includes an upper mold and a lower mold, the upper mold being a concave mold and the lower mold a convex mold. When the upper and lower molds are engaged, they form a closed molding cavity. The concave mold is provided with an injection channel and an air channel. An annular cavity is provided around the air channel, and an air outlet communicating with the annular cavity is provided on the air channel. The air outlet is inclined downwards and faces into the air channel. A high-pressure air chamber communicating with the annular cavity is provided on one side of the air channel. A slider is provided between the cavity and the air passage, and a connection port is provided on the slider. An air bag is provided below the slider. The air passage is connected to the upper cooling passage. The protruding part of the punch includes a balance cavity and a slide plate. The slide plate is slidably connected to the punch and the slide plate closes the balance cavity. A pressure reducing valve is fixed on the slide plate and a limit block is provided on the slide plate. A high-pressure air pump and a lower cooling passage are provided inside the punch. The high-pressure air pump is connected to the balance cavity. This invention relates to an automotive injection mold. The automotive injection mold can quickly cool the plastic melt in the forming cavity and improve the molding efficiency of the mold.

[0004] In the aforementioned patent, although the automotive injection mold can quickly cool the plastic melt in the molding cavity, it uses cold air as a medium for accelerated cooling. This cooling method has two drawbacks: firstly, air has a low thermal conductivity, and secondly, it easily causes air to enter the mold cavity, forming bubbles on the cast product, resulting in product defects and reducing the quality of the product. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an injection mold for automotive foamed plastic skeletons.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an injection mold for a foamed plastic skeleton of an automobile, comprising a lower mold and an upper mold, wherein the upper mold is disposed above the lower mold, four positioning rods are fixedly installed on the upper surface of the lower mold, the upper mold is sleeved on the outer surface of the positioning rods, a mold groove is formed on the upper surface of the lower mold, an injection tube is connected to the upper surface of the upper mold, the injection tube is connected to the bottom end of the upper mold, a cooling chamber is formed inside both the lower mold and the upper mold, an inlet pipe is connected to the upper surface of the upper mold, an outlet pipe is connected to the lower surface of the lower mold, a slot is formed on one side wall of the lower mold, a baffle is slidably connected to the inner wall of the slot, and an ejection assembly is provided inside the mold groove.

[0007] As a further description of the above technical solution:

[0008] The liquid inlet pipe is connected to the cooling chamber inside the upper mold, and the liquid outlet pipe is connected to the cooling chamber inside the lower mold.

[0009] As a further description of the above technical solution:

[0010] A sealing sleeve is fitted on the outer surface of the top of the lower mold, and a positioning block is fixedly installed on the side wall of the top of the lower mold. A positioning groove is opened on the inner wall of the sealing sleeve to be inserted into the positioning block.

[0011] As a further description of the above technical solution:

[0012] A fixing plate is fixedly installed at the end of the baffle away from the lower mold. A rotating plate is rotatably connected to the side wall of the lower mold. A fixing block is fixedly installed on the side wall of the fixing plate. The fixing block is L-shaped. The rotating plate is engaged with the fixing block.

[0013] As a further description of the above technical solution:

[0014] A connecting sleeve is fixedly installed at the opening of the upper cooling chamber of the upper mold, and a connecting groove is provided at the opening of the lower cooling chamber. The connecting sleeve is inserted into the connecting groove.

[0015] As a further description of the above technical solution:

[0016] The ejection assembly includes a top plate, a threaded rod, and a limiting rod. The top plate is disposed inside the mold groove. The threaded rod and the limiting rod are both fixedly installed on the lower surface of the top plate. The threaded rod and the limiting rod both penetrate the bottom wall of the mold groove and extend to the lower surface of the lower mold. A rotating block is rotatably connected to the lower surface of the lower mold. Two support blocks are fixedly installed on the inner wall of the cooling chamber inside the lower mold.

[0017] As a further description of the above technical solution:

[0018] The rotating block is sleeved on the outer surface of the threaded rod, the threaded rod is threadedly connected to the rotating block, and the threaded rod and the limiting rod respectively pass through the corresponding support block.

[0019] This utility model has the following beneficial effects:

[0020] 1. Compared with existing technologies, this automotive foamed plastic skeleton injection mold, through the coordination of components such as a lower mold, upper mold, positioning rod, mold groove, injection tube, cooling chamber, liquid inlet pipe, liquid outlet pipe, sealing sleeve, positioning block, slot, baffle, fixing plate, rotating plate, fixing block, connecting sleeve, and connecting groove, achieves the function of rapidly cooling and molding the product inside the injection mold. By using cooling water to directly cool the mold and the injection molded product from inside the mold, the cooling rate of the mold and the product is improved, and the molding speed of the product is accelerated. At the same time, the sealing sleeve, connecting sleeve, and connecting groove prevent cooling water from entering the mold cavity, avoiding affecting the quality of the injection molded product.

[0021] 2. Compared with existing technologies, this automotive foamed plastic skeleton injection mold, through the cooperation of components such as a top plate, threaded rod, limiting rod, rotating block, and support block, achieves the function of quickly and conveniently ejecting the molded automotive foamed plastic skeleton. By setting a rotating block and threaded rod, simply rotating the rotating block can drive the threaded rod and limiting rod to push the injection molded product upward through the top plate, ejecting the injection molded product from inside the mold cavity, thus speeding up the mold's part removal rate. At the same time, it can also prevent scratches on the product, avoid product scratches, and improve the practicality of the injection mold. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the injection mold for the automotive foamed plastic skeleton proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the sealing ring structure of the injection mold for the automotive foamed plastic skeleton proposed in this utility model;

[0024] Figure 3 This is a schematic diagram of the connecting sleeve structure of the injection mold for the automotive foamed plastic skeleton proposed in this utility model;

[0025] Figure 4 This is a schematic diagram of the insert plate structure of the injection mold for the automotive foamed plastic skeleton proposed in this utility model.

[0026] Figure 5 This is a schematic diagram of the cooling chamber structure of the automotive foamed plastic skeleton injection mold proposed in this utility model;

[0027] Figure 6 This is a schematic diagram of the ejection structure of the injection mold for the automotive foamed plastic skeleton proposed in this utility model.

[0028] Legend:

[0029] 1. Lower mold; 2. Upper mold; 3. Positioning rod; 4. Mold groove; 5. Injection tube; 6. Cooling chamber; 7. Inlet pipe; 8. Outlet pipe; 9. Sealing sleeve; 10. Positioning block; 11. Slot; 12. Baffle; 13. Fixing plate; 14. Rotating plate; 15. Fixing block; 16. Connecting sleeve; 17. Connecting groove; 18. Top plate; 19. Threaded rod; 20. Limiting rod; 21. Rotating block; 22. Support block. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figures 1 to 6 The present invention provides an injection mold for a foamed plastic frame for automobiles, comprising a lower mold 1 and an upper mold 2. The upper mold 2 is positioned above the lower mold 1. Four positioning rods 3 are fixedly installed on the upper surface of the lower mold 1. The upper mold 2 is fitted onto the outer surface of the positioning rods 3. A mold groove 4 is formed on the upper surface of the lower mold 1. An injection tube 5 is connected to the upper surface of the upper mold 2, and the injection tube 5 is connected to the bottom end of the upper mold 2. A cooling chamber 6 is formed inside both the lower mold 1 and the upper mold 2. An inlet pipe 7 is connected to the upper surface of the upper mold 2, and the inlet pipe 7 is connected to the cooling chamber 6 inside the upper mold 2. An outlet pipe 8 is connected to the lower surface of the lower mold 1, and the outlet pipe 8 is connected to the cooling chamber 6 inside the lower mold 1. A mold groove 4 is formed on the outer surface of the top of the lower mold 1. A sealing sleeve 9 is provided. A positioning block 10 is fixedly installed on the side wall of the top of the lower mold 1. A positioning groove is opened on the inner wall of the sealing sleeve 9 to be inserted into the positioning block 10. A slot 11 is opened on one side wall of the lower mold 1. A baffle 12 is slidably connected to the inner wall of the slot 11. A fixing plate 13 is fixedly installed on the end of the baffle 12 away from the lower mold 1. A rotating plate 14 is rotatably connected to the side wall of the lower mold 1. A fixing block 15 is fixedly installed on the side wall of the fixing plate 13. The fixing block 15 is L-shaped. The rotating plate 14 is engaged with the fixing block 15. A connecting sleeve 16 is fixedly installed at the opening of the cooling chamber 6 on the upper mold 2. A connecting groove 17 is opened at the opening of the cooling chamber 6 on the lower mold 1. The connecting sleeve 16 is inserted into the connecting groove 17.

[0032] By setting up a lower mold 1, upper mold 2, positioning rod 3, mold groove 4, injection tube 5, cooling chamber 6, liquid inlet pipe 7, liquid outlet pipe 8, sealing sleeve 9, positioning block 10, slot 11, baffle 12, fixing plate 13, rotating plate 14, fixing block 15, connecting sleeve 16, and connecting groove 17, the function of quickly cooling and molding the product inside the injection mold is realized. By using cooling water to cool the mold and the injection molded product directly from the inside of the mold, the cooling rate of the mold and the product is improved, and the molding speed of the product is accelerated. At the same time, the sealing sleeve 9, connecting sleeve 16, and connecting groove 17 prevent cooling water from entering the mold cavity and avoid affecting the quality of the injection molded product.

[0033] The mold groove 4 is equipped with an ejection assembly, which includes a top plate 18, a threaded rod 19, and a limiting rod 20. The top plate 18 is located inside the mold groove 4. The threaded rod 19 and the limiting rod 20 are both fixedly installed on the lower surface of the top plate 18. The threaded rod 19 and the limiting rod 20 penetrate the bottom wall of the mold groove 4 and extend to the lower surface of the lower mold 1. A rotating block 21 is rotatably connected to the lower surface of the lower mold 1. The rotating block 21 is sleeved on the outer surface of the threaded rod 19. The threaded rod 19 is threadedly connected to the rotating block 21. Two support blocks 22 are fixedly installed on the inner wall of the cooling chamber 6 inside the lower mold 1. The threaded rod 19 and the limiting rod 20 respectively penetrate the corresponding support blocks 22.

[0034] By setting up a top plate 18, a threaded rod 19, a limiting rod 20, a rotating block 21, and a support block 22, the function of quickly and conveniently ejecting the molded automotive foam plastic skeleton is realized. By setting up a rotating block 21 and a threaded rod 19, simply rotating the rotating block 21 can drive the top plate 18 to push the injection molded product upward through the threaded rod 19 and the limiting rod 20, ejecting the injection molded product from inside the mold groove 4, which speeds up the part removal rate of the mold, and at the same time prevents scratches on the product, avoiding scratches on the product and improving the practicality of the injection mold.

[0035] Working principle: When using injection molds to manufacture automotive foam plastic skeletons, first, the sealing sleeve 9 is fitted onto the outer surface of the top of the lower mold 1, and the positioning block 10 is inserted into the positioning groove to fix the sealing sleeve 9. Then, the upper mold 2 is fitted onto the outer surface of the positioning rod 3 and moved downwards, so that the upper mold 2 contacts the lower mold 1. The connecting sleeve 16 is inserted into the connecting groove 17. At this time, the lower mold 1, the upper mold 2 and the mold groove 4 are sealed to form a mold cavity. The injection tube 5 is connected to the mold cavity, and the cooling chamber 6 inside the lower mold 1 and the upper mold 2 is connected. Then, the molten foamed plastic is injected into the mold cavity through the injection tube 5 to produce the foamed plastic skeleton. Then, cooling water is added to the cooling chamber 6 through the liquid inlet pipe 7. The cooling water inside the cooling chamber 6 accelerates the cooling of the mold and the product, speeding up the product molding.

[0036] After the product is formed, rotate the rotating plate 14 upward so that the rotating plate 14 rotates out from the inside of the fixed block 15, releasing the restriction on the fixed plate 13. Then pull the fixed plate 13, and through the fixed plate 13 drive the baffle 12 to slide out from the inside of the slot 11, so that the liquid outlet pipe 8 is unobstructed, and the cooling water inside the cooling chamber 6 is discharged from the inside of the mold through the liquid outlet pipe 8.

[0037] Next, the upper mold 2 is raised to separate it from the lower mold 1. Then, the rotating block 21 is rotated. When the rotating block 21 rotates, it drives the threaded rod 19 to move. Under the action of the limiting rod 20, the threaded rod 19 and the limiting rod 20 push the top plate 18 upward. The top plate 18 pushes the product out of the mold groove 4, completing the product removal.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An injection mold for a foamed plastic frame for automobiles, comprising a lower mold (1) and an upper mold (2), characterized in that: The upper mold (2) is positioned above the lower mold (1). Four positioning rods (3) are fixedly installed on the upper surface of the lower mold (1). The upper mold (2) is sleeved on the outer surface of the positioning rods (3). A mold groove (4) is opened on the upper surface of the lower mold (1). An injection tube (5) is connected to the upper surface of the upper mold (2). The injection tube (5) is connected to the bottom end of the upper mold (2). A cooling chamber (6) is opened in the interior of the lower mold (1) and the upper mold (2). An inlet pipe (7) is connected to the upper surface of the upper mold (2). An outlet pipe (8) is connected to the lower surface of the lower mold (1). A slot (11) is opened on one side wall of the lower mold (1). A baffle (12) is slidably connected to the inner wall of the slot (11). An ejector assembly is provided inside the mold groove (4).

2. The automotive foamed plastic skeleton injection mold according to claim 1, characterized in that: The liquid inlet pipe (7) is connected to the cooling chamber (6) inside the upper mold (2), and the liquid outlet pipe (8) is connected to the cooling chamber (6) inside the lower mold (1).

3. The automotive foamed plastic frame injection mold according to claim 1, characterized in that: A sealing sleeve (9) is fitted on the outer surface of the top end of the lower mold (1), and a positioning block (10) is fixedly installed on the side wall of the top end of the lower mold (1). A positioning groove is opened on the inner wall of the sealing sleeve (9) to be inserted into the positioning block (10).

4. The automotive foamed plastic skeleton injection mold according to claim 1, characterized in that: A fixing plate (13) is fixedly installed at the end of the baffle (12) away from the lower mold (1). A rotating plate (14) is rotatably connected to the side wall of the lower mold (1). A fixing block (15) is fixedly installed on the side wall of the fixing plate (13). The fixing block (15) is L-shaped. The rotating plate (14) and the fixing block (15) are engaged.

5. The automotive foamed plastic skeleton injection mold according to claim 1, characterized in that: A connecting sleeve (16) is fixedly installed at the opening of the cooling chamber (6) of the upper mold (2), and a connecting groove (17) is provided at the opening of the cooling chamber (6) of the lower mold (1). The connecting sleeve (16) is inserted into the connecting groove (17).

6. The automotive foamed plastic skeleton injection mold according to claim 1, characterized in that: The ejection assembly includes a top plate (18), a threaded rod (19), and a limiting rod (20). The top plate (18) is located inside the mold groove (4). The threaded rod (19) and the limiting rod (20) are both fixedly installed on the lower surface of the top plate (18). The threaded rod (19) and the limiting rod (20) both penetrate the bottom wall of the mold groove (4) and extend to the lower surface of the lower mold (1). A rotating block (21) is rotatably connected to the lower surface of the lower mold (1). Two support blocks (22) are fixedly installed on the inner wall of the cooling chamber (6) inside the lower mold (1).

7. The automotive foamed plastic skeleton injection mold according to claim 6, characterized in that: The rotating block (21) is sleeved on the outer surface of the threaded rod (19), the threaded rod (19) is threadedly connected to the rotating block (21), and the threaded rod (19) and the limiting rod (20) respectively pass through the corresponding support block (22).

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