PU foaming exhaust mold

Abstract

The utility model provides a kind of PU foaming exhaust die, it is related to PU foaming technical field, including upper die and lower die, the upper die is installed above lower die, the top of the upper die is equipped with upper die bottom plate, the bottom of the lower die is equipped with lower die bottom plate, the outside of the upper die and lower die is equipped with locking mechanism and guide mechanism respectively, the top of the upper die and inside located upper die bottom plate are equipped with several exhaust cylinders, the upper surface of the upper die is also provided with the exhaust air path for exhaust cylinder and inside communication.The utility model utilizes exhaust air path exhaust cylinder and can exhaust the air inside mould to mould outside, so that PU material is foamed, mould inside will not be left with air, can make foaming more full, product inside will not exist bubble after forming, surface is more level, product each position place density is more uniform, can effectively improve product quality.

Description

Technical Field

[0001] This utility model relates to the field of PU foaming technology, and more specifically, to a PU foaming venting mold. Background Technology

[0002] Polyurethane, also known as PU, is widely used in automotive interiors, furniture, insulation materials, footwear, and packaging materials due to its excellent cushioning performance, heat and sound insulation, strong design flexibility, and relatively low cost. Most automotive rear carpets are molded using PU foam. The process involves injecting a liquid PU raw material mixture into a mold cavity, where it undergoes a chemical reaction and foaming, ultimately curing to obtain the desired shape. However, existing molds often suffer from insufficient venting, leading to incomplete filling, air bubbles, uneven surfaces, and inconsistent density, all of which negatively impact performance. Therefore, we have developed an improved PU foam venting mold. Utility Model Content

[0003] The main purpose of this utility model is to provide a PU foam venting mold, which can effectively solve the problem that insufficient venting inside the mold during use will result in incomplete filling, air bubbles inside the molded product, uneven surface, and uneven product density, thus affecting performance.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A PU foam venting mold includes an upper mold and a lower mold. The upper mold is installed above the lower mold. An upper mold base plate is installed on the top of the upper mold, and a lower mold base plate is installed on the bottom of the lower mold. A mold locking mechanism and a guide mechanism are respectively provided on the outer sides of the upper mold and the lower mold. Several venting cylinders are installed on the top of the upper mold and inside the upper mold base plate. The upper surface of the upper mold is also provided with venting air passages for communicating with the venting cylinders.

[0006] Preferably, the upper surface of the upper mold is provided with a plurality of mounting holes for filling material, and a filling gun head is installed inside the mounting holes.

[0007] Preferably, two forklift insertion holes are provided on one side surface of the lower mold.

[0008] Preferably, the locking mechanism includes locking templates, which are installed on both ends of the lower mold surface, and a locking block is installed on the top side of each locking template.

[0009] Preferably, the upper mold has slots on both sides that mate with the locking block, and a fastening bolt for fixing the locking block is installed on one side of the locking template.

[0010] Preferably, the guiding mechanism includes an upper guide seat and a lower guide seat, which are respectively installed on the two side surfaces of the upper mold and the lower mold and are positioned correspondingly. A limit post is installed inside the upper guide seat, and a mating groove that can cooperate with the limit post is opened inside the lower guide seat.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The exhaust cylinder, utilizing the exhaust air passage, can expel air from inside the mold to the outside, ensuring that no air remains inside the mold during PU material foaming. This results in fuller foaming, a bubble-free product after molding, a smoother surface, and more uniform density throughout the product, effectively improving product quality. During the mold closing process of the upper and lower molds, the fit between the limiting post and the mating groove guides the movement of the upper mold, preventing positional shifts during mold closing and ensuring more precise positioning. The locking block is fixed in the slot on the surface of the upper mold using fastening bolts, and multiple locking plates can lock the upper and lower molds together, preventing positional shifts during PU material filling. Attached Figure Description

[0013] Figure 1 This is a front view of the present invention;

[0014] Figure 2 This is the right view of the present invention;

[0015] Figure 3 This is the left view of the present invention;

[0016] Figure 4 This is a top view of the upper mold and the upper mold base plate of this utility model.

[0017] In the diagram: 1. Upper mold; 2. Lower mold; 3. Upper mold base plate; 4. Lower mold base plate; 5. Filler nozzle; 6. Mold locking mechanism; 601. Locking plate; 602. Locking block; 603. Fastening bolt; 604. Locking groove; 7. Guide mechanism; 701. Upper guide seat; 702. Lower guide seat; 703. Limiting post; 704. Mating groove; 8. Forklift insertion hole; 9. Exhaust cylinder; 10. Exhaust air passage; 11. Mounting hole. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0019] like Figure 1 , Figure 2 As shown, a PU foam venting mold includes an upper mold 1 and a lower mold 2. The upper mold 1 is installed above the lower mold 2. An upper mold base plate 3 is installed on the top of the upper mold 1, and a lower mold base plate 4 is installed on the bottom of the lower mold 2. A mold locking mechanism 6 and a guide mechanism 7 are respectively provided on the outer sides of the upper mold 1 and the lower mold 2. Several venting cylinders 9 are installed on the top of the upper mold 1 and inside the upper mold base plate 3. The upper surface of the upper mold 1 is also provided with a venting air passage 10 for communicating between the venting cylinders 9 and the interior.

[0020] like Figure 2 , Figure 4 As shown, the upper surface of the upper mold 1 is provided with several mounting holes 11 for filling materials, and a filling gun head 5 is installed inside the mounting holes 11. The end of the filling gun head 5 can be installed using the mounting holes 11, making it convenient for the filling gun head 5 to fill materials.

[0021] like Figure 1 As shown, two forklift insertion holes 8 are provided on one side surface of the lower mold 2. The forklift insertion holes 8 facilitate the insertion of the forklift and its position movement.

[0022] like Figure 3 As shown, the locking mechanism 6 includes a locking template 601, which is installed on both ends of the lower mold 2. A locking block 602 is installed on one side of the top of each locking template 601. The upper mold 1 has slots 604 on both sides that mate with the locking blocks 602. A fastening bolt 603 for fixing the locking blocks 602 is installed on one side of the locking template 601. After the upper mold 1 and lower mold 2 are engaged, the locking blocks 602 are installed into the slots 604, and the fastening bolts 603 are used to fix the position of the locking blocks 602 within the slots 604. This allows the locking template 601 to connect the upper mold 1 and lower mold 2 together, resulting in a more stable mold position during material filling.

[0023] like Figure 3As shown, the guiding mechanism 7 includes an upper guide seat 701 and a lower guide seat 702. The upper guide seat 701 and the lower guide seat 702 are respectively installed on the two side surfaces of the upper mold 1 and the lower mold 2, and their positions correspond. A limit post 703 is installed inside the upper guide seat 701, and a mating groove 704 that can cooperate with the limit post 703 is opened inside the lower guide seat 702. During the mold closing process, the limit post 703 will first be inserted into the mating groove 704, which plays a guiding role in the movement of the upper mold 1, so that its position will not be deviated and the position is more accurate.

[0024] The working principle of this PU foaming venting mold:

[0025] The upper mold 1 is moved using the upper mold base plate 3, while the lower mold 2 is fixed in position using the lower mold base plate 4. During the mold closing process of the upper mold 1 and lower mold 2, the limiting post 703 is inserted into the mating groove 704, which guides the upper mold 1 and prevents positional displacement during mold closing, making the position more accurate. After mold closing, the locking block 602 is fixed in the slot 604 on the surface of the upper mold 1 using the fastening bolt 603. Multiple locking plates 601 can lock the upper mold 1 and lower mold 2 together. During the PU material filling process... The upper mold 1 and lower mold 2 will not shift in position, which is more conducive to filling material. The filling gun head 5 is installed through the mounting hole 11, and PU material can be filled into the interior of the upper mold 1 and lower mold 2 through the filling gun head 5. During the filling process, the air inside the mold can be discharged to the outside of the mold through the exhaust air passage 10 and the exhaust air cylinder 9, so that no air will remain inside the mold when the PU material foams, which can make the foam fuller. After molding, there will be no air bubbles inside the product, the surface will be smoother, and the density of the product will be more uniform in all parts, which can effectively improve the product quality.

[0026] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A PU foaming and venting mold, comprising an upper mold (1) and a lower mold (2), characterized in that: The upper mold (1) is installed above the lower mold (2). The top of the upper mold (1) is equipped with an upper mold base plate (3), and the bottom of the lower mold (2) is equipped with a lower mold base plate (4). The outer sides of the upper mold (1) and the lower mold (2) are respectively provided with a mold locking mechanism (6) and a guide mechanism (7). Several exhaust cylinders (9) are installed on the top of the upper mold (1) and inside the upper mold base plate (3). The upper surface of the upper mold (1) is also provided with an exhaust air passage (10) for communicating with the exhaust cylinders (9) and the interior.

2. The PU foaming venting mold according to claim 1, characterized in that: The upper surface of the upper mold (1) is provided with a plurality of mounting holes (11) for filling material, and a filling gun head (5) is installed inside the mounting holes (11).

3. The PU foaming venting mold according to claim 1, characterized in that: Two forklift insertion holes (8) are provided on one side surface of the lower mold (2).

4. The PU foaming venting mold according to claim 1, characterized in that: The locking mechanism (6) includes a locking template (601), which is installed on both ends of the lower mold (2). Each locking template (601) has a locking block (602) installed on one side of its top.

5. A PU foaming venting mold according to claim 4, characterized in that: The upper mold (1) has slots (604) on both sides that cooperate with the locking block (602), and a fastening bolt (603) for fixing the locking block (602) is installed on one side of the locking template (601).

6. The PU foaming venting mold according to claim 5, characterized in that: The guiding mechanism (7) includes an upper guide seat (701) and a lower guide seat (702). The upper guide seat (701) and the lower guide seat (702) are respectively installed on the two side surfaces of the upper mold (1) and the lower mold (2) and are in corresponding positions. A limit post (703) is installed inside the upper guide seat (701), and a mating groove (704) that can cooperate with the limit post (703) is opened inside the lower guide seat (702).

Images