An automotive foam product mold

Abstract

The utility model relates to a kind of automobile foaming product mould, including upper mould and lower mould, lower mould includes first mould block, second mould block and third mould block, first mould block and third mould block are respectively slidably installed in the two sides of second mould block;Mould includes open mould state and combined state, when mould is in open mould state, upper mould, first mould block and third mould block with second mould block all have interval;When mould is in combined state, upper mould, first mould block, second mould block and third mould block mutually combine, foaming material is located between upper mould and lower mould.Compared with prior art, the utility model has the advantages that the lower mould is divided into three parts, and the first mould block and the third mould block are slidably installed on the two sides of the second mould block, which facilitates the forming of large-scale product concave features.

Description

Technical Field

[0001] This utility model relates to molds, and more particularly to a mold for automotive foam products. Background Technology

[0002] Automotive foam products are indispensable functional materials in the modern automotive industry, mainly used in three areas: filling, sound insulation, and heat insulation. These products typically use foamable polymer materials such as polyurethane (PU) and polypropylene (EPP) as the matrix, and are formed through chemical reactions or physical foaming processes. They have significant characteristics such as soft texture, high elasticity, and strong plasticity.

[0003] In filling applications, foamed materials are commonly used for filling the interior of car seats, headrests, armrests, and dashboards. They not only provide comfortable support and cushioning for occupants but also effectively absorb vibrations, improving ride smoothness. In sound and heat insulation, foamed materials, with their numerous closed or interconnected microporous structures, become ideal acoustic and thermal management media. As a sound insulation material, it is filled in body cavities, door interlayers, under the floor, and wheel arch liners, effectively blocking and absorbing engine noise, road noise, and wind noise, significantly improving the vehicle's NVH (noise, vibration, and harshness) performance. As a heat insulation material, it is used in engine compartment heat shields, air conditioning system ducts, and the interior of the passenger compartment, blocking external heat transfer or internal temperature loss, improving air conditioning efficiency and passenger comfort. Foaming molding processes are suitable for automotive parts with highly irregular shapes, complex curved surfaces, small features, and even deep indentations. Within the mold, the foam expands and fills every corner, achieving precise replication.

[0004] A search revealed that application publication number CN114407273A discloses a foaming mold for switching between full and partial leather on automotive dashboards and its usage method. Specifically, it discloses that the fifth, second, and third sliders are each provided with an opening groove. These three opening grooves, when fitted with the corresponding slider's plane, form three contoured leather-clamping grooves. These three grooves together constitute the overall contoured leather-clamping groove of the lower mold. Vacuum channels are provided on the fifth slider, slider bracket, second slider, first slider, third slider, and fourth slider. However, this prior art, with the sliders located on the lower mold, is mainly used for localized shaping and cannot achieve the forming of large-scale concave undercut features.

[0005] In summary, the technical problem that needs to be solved is how to design a mold that can achieve the forming of large concave undercut features. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology, which cannot achieve the forming of large concave undercut features, and to provide a mold for automotive foam products.

[0007] The objective of this utility model can be achieved through the following technical solutions.

[0008] According to one aspect of the present invention, a mold for automotive foam products is provided, comprising an upper mold and a lower mold, wherein the lower mold comprises a first mold block, a second mold block and a third mold block, and the first mold block and the third mold block are respectively slidably mounted on both sides of the second mold block; The mold includes an open state and an assembled state. When the mold is in the open state, there are gaps between the upper mold, the first mold block, the third mold block, and the second mold block. When the mold is in the assembled state, the upper mold, the first mold block, the second mold block, and the third mold block are assembled together, and the foaming material is located between the upper mold and the lower mold.

[0009] As a preferred technical solution, the first mold block and the third mold block have protrusions that protrude toward the second mold block, and the height of the protrusions on the side closer to the upper mold is greater than the height of the protrusions on the side farther away from the upper mold.

[0010] As a preferred technical solution, the first mold block and the third mold block are provided with a first protrusion, and the second mold block is provided with a first groove. The first protrusion and the first groove have the same shape. When the mold is in the assembled state, the first protrusion and the first groove are engaged.

[0011] As a preferred technical solution, the upper mold is provided with a second protrusion, and the second mold block is provided with a second groove. The second protrusion and the second groove have the same shape. When the mold is in the assembled state, the second protrusion and the second groove are engaged.

[0012] As a preferred technical solution, both the first mold block and the third mold block are connected to the output end of the reciprocating telescopic motion cylinder.

[0013] As a preferred technical solution, the first mold block and the third mold block are provided with guide holes along the sliding direction, and one end of the guide post is fixed in the guide hole; the output end of the reciprocating telescopic motion cylinder is provided with a guide block, and the guide post passes through the guide block and forms a sliding pair with the guide block.

[0014] As a preferred technical solution, water channels are provided in both the upper and lower molds, and water flows through the water channels when the molds are in the assembled state.

[0015] As a preferred technical solution, the upper mold, the first mold block, the second mold block and the third mold block are all equipped with water inlets and outlets; the water inlets and outlets of the upper mold are connected to an external water source; the first mold block, the second mold block and the third mold block are connected in series by water pipes and are all connected to an external water source.

[0016] As a preferred technical solution, the lower mold is installed on the lifting airbag. When the mold is in the open state, the lifting airbag is in the folded state; when the mold is in the closed state, the lifting airbag is in the inflated state.

[0017] As a preferred technical solution, the upper mold is provided with an upper mold mounting hole, and the second mold block is provided with a lower mold mounting hole.

[0018] Compared with the prior art, the present invention has the following beneficial effects.

[0019] 1) This utility model adopts a lower mold that is divided into three parts, and the first mold block and the third mold block are respectively slidably installed on both sides of the second mold block, which facilitates the forming of the large concave undercut feature of the product.

[0020] 2) The first mold block and the third mold block of this utility model have protrusions that bulge towards the second mold block, and the height of the side closer to the upper mold is higher, which can realize the forming of the concave undercut feature.

[0021] 3) The first mold block and the third mold block of this utility model are positioned with the second mold block by the first protrusion and the first groove; the upper mold and the second mold block are positioned by the second protrusion and the second groove, which greatly improves the accuracy when the molds are assembled.

[0022] 4) This utility model uses a reciprocating telescopic cylinder to drive the first mold block and the third mold block to move, and uses a guide column for guidance, so as to achieve stable movement and accurate positioning of the first mold block and the third mold block.

[0023] 5) The mold of this utility model has a water channel. When the mold is in the assembled state, water is passed through to heat and shape the foamed product to be formed.

[0024] 6) This utility model uses a lifting airbag to move the lower mold, completing the mold opening and closing; the upper mold and the second mold block are both installed on the production site through mounting holes. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a mold for automotive foam products according to this utility model.

[0026] Figure 2 This is a schematic diagram of the lower mold of this utility model.

[0027] Figure 3 This is a schematic diagram of the product structure after being formed using this utility model.

[0028] The numbers in the diagram are as follows: 1. Upper mold; 10. Second protrusion; 11. Upper mold mounting hole; 2. Lower mold; 20. First mold block; 21. Second mold block; 22. Third mold block; 24. Protrusion; 25. First protrusion; 26. First groove; 27. Second groove; 28. Lower mold mounting hole; 3. Reciprocating telescopic motion cylinder; 4. Guide column; 5. Guide block; 6. Water channel. Detailed Implementation

[0029] 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, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0030] This utility model provides a mold for automotive foam products, including an upper mold 1 and a lower mold 2. The mold has an open state and an assembled state. When the mold is in the open state, there are gaps between the upper mold 1, the first mold block 20, the third mold block 22, and the second mold block 21; when the mold is in the assembled state, the upper mold 1, the first mold block 20, the second mold block 21, and the third mold block 22 are assembled together, and the foam material is located between the upper mold 1 and the lower mold 2. The upper mold 1 is provided with an upper mold mounting hole 11, and the second mold block 21 is provided with a lower mold mounting hole 28. These mounting holes facilitate fixing the mold to the production equipment, improving installation efficiency and stability.

[0031] The lower mold 2 includes a first mold block 20, a second mold block 21, and a third mold block 22. The first mold block 20 and the third mold block 22 are slidably mounted on both sides of the second mold block 21. The first mold block 20 and the third mold block 22 have protrusions 24 that protrude towards the second mold block 21. The height of the protrusions 24 on the side closer to the upper mold 1 is greater than the height of the protrusions on the side farther from the upper mold 1. This design not only enables the forming of large concave undercut features on the product but also allows for better guidance of the foam material flow during mold assembly, preventing air bubbles and improving product molding quality.

[0032] The first mold block 20 and the third mold block 22 are provided with a first protrusion 25, and the second mold block 21 is provided with a first groove 26. The first protrusion 25 and the first groove 26 have the same shape. When the molds are in the assembled state, the first protrusion 25 and the first groove 26 engage. This engaging structure ensures precise positioning when the molds are assembled and prevents mold misalignment from causing product size deviations.

[0033] The upper mold 1 has a second protrusion 10, and the second mold block 21 has a second groove 27. The second protrusion 10 and the second groove 27 have the same shape. When the molds are in the assembled state, the second protrusion 10 and the second groove 27 engage. This engaging design between the upper and lower molds 2 further improves the accuracy of mold assembly and ensures the consistency of product molding.

[0034] Both the first mold block 20 and the third mold block 22 are connected to the output end of the reciprocating telescopic cylinder 3. Guide holes are provided on the first mold block 20 and the third mold block 22 along the sliding direction, and one end of a guide post 4 is fixed inside the guide hole. A guide block 5 is provided at the output end of the reciprocating telescopic cylinder 3, and the guide post 4 passes through the guide block 5 and forms a sliding pair with the guide block 5. Driven by the cylinder, the first mold block 20 and the third mold block 22 can achieve precise sliding control, making the mold opening and closing more stable and reliable. The guiding structure, including the guide hole, guide block 5, and guide post 4, ensures the stability and accuracy of the first mold block 20 and the third mold block 22 during the sliding process, preventing the mold from shifting during movement.

[0035] Both the upper mold 1 and the lower mold 2 have water channels 6, which flow with water when the molds are in the closed state. The upper mold 1, the first mold block 20, the second mold block 21, and the third mold block 22 each have water inlets and outlets. The water inlets and outlets of the upper mold 1 are connected to an external water source, forming the first water circulation loop. The first mold block 20, the second mold block 21, and the third mold block 22 are interconnected by water pipes and all connected to an external water source, forming the second water circulation loop. The water channels 6 are designed for mold temperature control, ensuring that the foamed material cures and forms at a suitable temperature, improving product quality and production efficiency. The water channels 6 also ensure the uniformity of temperature across the mold, preventing localized overheating or undercooling that could lead to product deformation or poor quality.

[0036] The lower mold 2 is mounted on the lifting airbag. When the mold is in the open state, the lifting airbag is in the folded state; when the mold is in the closed state, the lifting airbag is in the inflated state. The design of the lifting airbag allows the mold to provide uniform pressure in the closed state, ensuring the consistency of the foam material filling the mold cavity and the density of the product.

[0037] The working process of this utility model is as follows: The lifting airbag lowers the lower mold 2, the upper mold 1 flips upward, the second mold block 21 is fixed, and the first mold block 20 and the third mold block 22 slide to the sides respectively. The product completed in the previous round is taken out (open mold state). Release agent is sprayed into the mold. The first mold block 20 and the third mold block 22 move towards the second mold block 21. The first protrusion 25 and the first groove 26 complete the positioning of the first mold block 20, the second mold block 21 and the third mold block 22. The foaming machine injects foaming material into the cavity of the lower mold 2. The upper mold 1 flips downward, and the lifting airbag raises the lower mold 2. The second protrusion 10 and the second groove 27 complete the positioning of the lower mold 2 and the upper mold 1 (closed mold state). Water at a set temperature is continuously circulated in the water channel 6. After the mold is maintained for a set process time, the above steps are repeated to take out the formed product.

[0038] This invention divides the lower mold 2 into three parts, with the middle part (second mold block 21) fixed and the two side sliders reciprocating via cylinders, thus forming the concave undercut parts on both sides of the product. The positioning structure (groove and protrusion) between the upper and lower molds and between the first mold block 20, the third mold block 22 and the second mold block 21 reduces the impact of the mold frame's error on the mold's precision. The guide pillars 4 on the mold further improve the yield rate of the molded products.

[0039] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A mold for automotive foam products, characterized in that, It includes an upper mold (1) and a lower mold (2). The lower mold (2) includes a first mold block (20), a second mold block (21) and a third mold block (22). The first mold block (20) and the third mold block (22) are slidably installed on both sides of the second mold block (21). The mold includes an open state and an assembled state. When the mold is in the open state, there is a gap between the upper mold (1), the first mold block (20), the third mold block (22), and the second mold block (21). When the mold is in the assembled state, the upper mold (1), the first mold block (20), the second mold block (21), and the third mold block (22) are assembled together, and the foaming material is located between the upper mold (1) and the lower mold (2).

2. The automotive foam product mold according to claim 1, characterized in that, The first mold block (20) and the third mold block (22) have protrusions (24) that protrude toward the second mold block (21), and the height of the protrusions (24) on the side closer to the upper mold (1) is greater than the height of the protrusions on the side farther away from the upper mold (1).

3. The automotive foam product mold according to claim 1, characterized in that, The first mold block (20) and the third mold block (22) are provided with a first protrusion (25), and the second mold block (21) is provided with a first groove (26). The first protrusion (25) and the first groove (26) have the same shape. When the mold is in the assembled state, the first protrusion (25) and the first groove (26) are engaged.

4. The automotive foam product mold according to claim 1, characterized in that, The upper mold (1) is provided with a second protrusion (10), and the second mold block (21) is provided with a second groove (27). The second protrusion (10) and the second groove (27) have the same shape. When the mold is in the assembled state, the second protrusion (10) and the second groove (27) are engaged.

5. A mold for automotive foam products according to claim 1, characterized in that, The first mold block (20) and the third mold block (22) are both connected to the output end of the reciprocating telescopic cylinder (3).

6. A mold for automotive foam products according to claim 5, characterized in that, The first mold block (20) and the third mold block (22) are provided with guide holes along the sliding direction, and one end of the guide post (4) is fixed in the guide hole; the output end of the reciprocating telescopic motion cylinder (3) is provided with a guide block (5), and the guide post (4) passes through the guide block (5) and forms a sliding pair with the guide block (5).

7. The automotive foam product mold according to claim 1, characterized in that, Water channels (6) are provided in both the upper mold (1) and the lower mold (2). When the molds are in the assembled state, water flows through the water channels (6).

8. A mold for automotive foam products according to claim 7, characterized in that, The upper mold (1), the first mold block (20), the second mold block (21) and the third mold block (22) are all equipped with water inlets and outlets; the water inlets and outlets of the upper mold (1) are connected to an external water source; the first mold block (20), the second mold block (21) and the third mold block (22) are connected in series by water pipes and are connected to an external water source.

9. A mold for automotive foam products according to claim 1, characterized in that, The lower mold (2) is installed on the lifting airbag. When the mold is in the open state, the lifting airbag is in the folded state; when the mold is in the closed state, the lifting airbag is in the inflated state.

10. A mold for automotive foam products according to claim 1, characterized in that, The upper mold (1) is provided with an upper mold mounting hole (11), and the second mold block (21) is provided with a lower mold mounting hole (28).

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