TPU (thermoplastic polyurethane) mold

Abstract

The utility model relates to the technical field of molds, and discloses a TPU mold which comprises a positioning frame, outer molds are installed in the front end and the rear end of the positioning frame, a disc is fixedly connected to the side face of the positioning frame, an installation plate is movably connected into the positioning frame in a sleeved mode, and an inner mold is fixedly connected to the middle of the upper end of the installation plate. A lead screw is installed in the disc, the outer portion of one side of the lead screw is sleeved with a connecting plate in a threaded mode, and one side of the connecting plate is fixedly connected with a limiting pin. The outer mold is installed on the side face of the positioning frame, through limiting of the positioning frame and the outer mold, it is avoided that too much TPU materials are squeezed in after equipment mold closing, the mold is expanded, meanwhile, the position of the outer mold is adjusted, the upper cover is opened, the mold can be driven to be taken out, and the tightness during mold closing and the convenience and stability during mold opening are improved.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically a TPU mold. Background Technology

[0002] Thermoplastic polyurethane elastomer, also known as thermoplastic polyurethane rubber, or TPU for short, is an (AB)n-type block linear polymer. A is a high molecular weight polyester or polyether (1000–6000), and B is a diol containing 2–12 straight-chain carbon atoms. The chemical structure between the AB segments is a diisocyanate. Thermoplastic polyurethane rubber is cross-linked by intermolecular hydrogen bonds or by slight cross-linking between macromolecular chains. These two cross-linking structures are reversible with increasing or decreasing temperature. In mold production, TPU material is poured into the mold to ensure proper molding. Molds are used to assist in the molding process and improve molding efficiency.

[0003] When using TPU molds, the TPU material is heated and melted, and then extruded into the mold. The TPU material is then removed or taken out by closing and opening the upper and lower molds. However, the mold movement is driven by a hydraulic rod to close, which may cause the mold to open if too much TPU material is extruded into the mold, thus affecting the quality of the molded material. Therefore, we have proposed a TPU mold. Utility Model Content

[0004] To address the shortcomings of existing TPU molds, this utility model provides a TPU mold that features a side-mounted outer mold. The positioning frame and the top cover limit the position of the outer mold, and the push-limiting pin moves to the inside of the side of the top cover to ensure the stability of the outer mold during positioning. This avoids deformation of the outer mold due to material compression after mold closing, thus solving the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a TPU mold, including a positioning frame, an outer mold installed inside the front and rear ends of the positioning frame, a disc fixedly connected to the side of the positioning frame, an installation plate movably sleeved inside the positioning frame, an inner mold fixedly connected to the middle of the upper end of the installation plate, a lead screw installed inside the disc, a connecting plate threaded onto one side of the lead screw, and a limit pin fixedly connected to one side of the connecting plate.

[0006] Preferably, the outer mold is movably sleeved on both sides of the inner mold, and a casting space is formed between the inner mold and the outer mold. After the casting material is transported to the casting space by the injection nozzle, the TPU material can be cast and formed.

[0007] Preferably, the upper end of the positioning frame is fitted with a top cover by a fastening thread, and injection nozzles are installed inside both sides of the positioning frame. One side of the injection nozzle is connected to a pouring pipe, and the inner side of the injection nozzle extends into the interior of the pouring space. By limiting the positioning frame and the outer mold, excessive TPU material is prevented from being squeezed in after the equipment closes the mold, which would cause the mold to open.

[0008] Preferably, a second bracket is installed on the outside of the positioning frame, and a hydraulic rod is installed inside the second bracket. The front end of the hydraulic rod is installed on the outside of the outer mold. The hydraulic rod drives the outer mold to adjust its position inside the positioning frame, thereby controlling the mold closing and opening operations of the outer mold.

[0009] Preferably, a first bracket is fitted onto the outside of the disc, and the first bracket is placed on the ground to improve the uniformity of the TPU material when it fills the casting space during the TPU material casting process and reduce casting defects.

[0010] Preferably, positioning plates are fixedly connected to both sides of the lower end of the mounting plate. The positioning plates pass through the positioning frame, and positioning pins are installed inside the positioning frame and the positioning plates. When the inner mold is installed, the mounting plate drives the positioning plates to be installed inside the positioning frame. At the same time, positioning pins are installed between the positioning frame and the positioning plates, that is, the positioning pins drive the positioning plates to be positioned inside the positioning frame.

[0011] Preferably, a belt is movably sleeved on the outside of the lead screw, a motor is mounted on the outside of the belt, reverse thread grooves are installed on both sides of the lead screw, and the front end of the limit pin moves through the positioning frame and is movably sleeved inside the side of the outer mold to ensure that the outer mold remains tight when it is closed and positioned, and pushes the connecting plate to move outward to ensure that the position of the limit pin is adjusted synchronously.

[0012] This invention utilizes an outer mold mounted on the side of a positioning frame. The positioning frame and the outer mold together limit the movement of the mold, preventing excessive TPU material from being squeezed in after mold closing, which could cause the mold to expand. It also allows for adjustment of the outer mold's position and opening the top cover for easy removal of the mold, improving both the tightness of mold closing and the convenience and stability of mold opening. The TPU mold is activated by a motor, which drives a lead screw via a belt. The lead screw moves synchronously with the connecting plate, allowing a limiting pin to extend from the side of the positioning frame and engage with the interior of the outer mold, enhancing the tightness of the outer mold during positioning within the positioning frame. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0014] Figure 2 This is a schematic cross-sectional view of the main body of this utility model;

[0015] Figure 3 This is a schematic diagram of the side cross-sectional structure of the main body of this utility model;

[0016] Figure 4 This is a schematic diagram of the structure of this utility model from below;

[0017] Figure 5 This is an enlarged structural diagram of point A in this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0019] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This utility model provides a TPU mold, including a positioning frame 1. An outer mold 3 is installed inside the front and rear ends of the positioning frame 1. After the outer mold 3 is installed from the side of the positioning frame 1, it improves the tightness when the mold is closed and prevents the injected TPU material from pushing the mold open. A disc 5 is fixedly connected to the side of the positioning frame 1. An installation plate 9 is movably sleeved inside the positioning frame 1. An inner mold 10 is fixedly connected to the middle of the upper end of the installation plate 9. After the installation plate 9 drives the inner mold 10 to extend to the middle of the outer mold 3, a casting space is formed between the outer mold 3 and the inner mold 10. A lead screw 13 is installed inside the disc 5. A connecting plate 11 is threaded on one side of the lead screw 13. A limit pin 12 is fixedly connected to one side of the connecting plate 11. When the lead screw 13 rotates, the lead screw 13 drives the position of the connecting plate 11 to adjust. The connecting plate 11 drives the limit pin 12 to engage inside the outer mold 3, improving the tightness of the outer mold 3 when it is closed and positioned inside the positioning frame 1.

[0020] The outer mold 3 is movably sleeved on both sides of the inner mold 10, and a casting space is formed between the inner mold 10 and the outer mold 3. Since the outer mold 3 is movably sleeved on both sides of the inner mold 10, a casting space is formed between the outer mold 3 and the inner mold 10. After the casting material is transported to the casting space by the injection nozzle 4, the TPU material can be cast and formed.

[0021] The upper end of the positioning frame 1 is fitted with a top cover 2 via a fastening thread. Injection nozzles 4 are installed inside both sides of the positioning frame 1. One side of the injection nozzle 4 is connected to a pouring pipe, and the inner side of the injection nozzle 4 extends into the pouring space. After the injection nozzle 4 is installed inside the positioning frame 1, it passes through the outer mold 3 and extends into the positioning frame 1. That is, the injection nozzle 4 can drive the material to be injected into the pouring space. At the same time, the top cover 2 is set at the upper end of the positioning frame 1. By removing the top cover 2, it is convenient to remove the mold after molding. After the top cover 2 is fixed at the upper end of the outer mold 3, the outer mold 3 is pushed to move into the positioning frame 1. The top cover 2 restricts the movement trajectory of the outer mold 3.

[0022] The positioning frame 1 has a second bracket 7 installed on its exterior, and a hydraulic rod 8 installed inside the second bracket 7. The front end of the hydraulic rod 8 is installed on the exterior of the outer mold 3. By activating the hydraulic rod 8, the hydraulic rod 8 drives the outer mold 3 to adjust its position inside the positioning frame 1, ensuring that the outer mold 3 is adjusted within the positioning frame 1.

[0023] The disc 5 is fitted with a first bracket 6 on its outer side. The first bracket 6 is placed on the ground. The disc 5 can be rotated inside the first bracket 6. By rotating the disc 5, the mold can be rotated, which improves the uniformity of TPU material filling into the casting space during the TPU material casting process and reduces casting defects.

[0024] The lead screw 13 is externally connected to a belt 14, and a motor 15 is installed on the outside of the belt 14. At the same time, positioning pins are installed inside the positioning frame 1 and the positioning plate 16. The mounting plate 9 drives the inner mold 10 to be installed inside the positioning frame 1. The inner mold 10 drives the positioning plate 16 to extend into the interior of the positioning frame 1. At the same time, a positioning pin is installed between the positioning frame 1 and the positioning plate 16. That is, the positioning pin drives the positioning plate 16 to be spliced ​​and positioned inside the positioning frame 1.

[0025] The mounting plate 9 has two fixedly connected positioning plates 16 on its lower end. The positioning plates 16 are installed at the lower end of the positioning frame 1. The screw 13 has reverse thread grooves on both sides. The front end of the limit pin 12 moves through the positioning frame 1 and is movably sleeved inside the side of the outer mold 3. By starting the motor 15, the motor 15 drives the screw 13 to rotate synchronously through the belt 14. The screw 13 drives the position between the two sets of connecting plates 11 to be adjusted by threads. That is, the connecting plate 11 drives the limit pin 12 to be engaged inside the outer mold 3, ensuring that the outer mold 3 is tightly closed and positioned, and pushing the connecting plate 11 to move outward, ensuring that the position of the limit pin 12 is adjusted synchronously.

[0026] Working principle: During use, the mounting plate 9 is installed inside the positioning frame 1, and the inner mold 10 is positioned inside the positioning frame 1. At the same time, the hydraulic rod 8 is activated, which pushes the outer mold 3 to extend into the positioning frame 1. Meanwhile, the upper cover 2 limits the movement trajectory of the outer mold 3. The motor 15 is activated, which drives the lead screw 13 to rotate. The lead screw 13 drives the connecting plate 11 to move inward synchronously. The control limit pin 12 is engaged inside the outer mold 3. At the same time, the injection nozzle 4 is used to pour the material between the outer mold 3 and the inner mold 10. The rotating disc 5 drives the entire mold to rotate, ensuring that the TPU material is fully adjusted to the pouring space, thus avoiding insufficient material filling and affecting the molding efficiency.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A TPU mold, characterized in that, The device includes a positioning frame, with an outer mold installed inside the front and rear ends of the positioning frame. A disc is fixedly connected to the side of the positioning frame. An installation plate is movably sleeved inside the positioning frame. An inner mold is fixedly connected to the middle of the upper end of the installation plate. A lead screw is installed inside the disc. A connecting plate is threaded onto one side of the lead screw. A limit pin is fixedly connected to one side of the connecting plate.

2. A TPU mold according to claim 1, characterized in that, The outer mold is movably fitted onto both sides of the inner mold, and a pouring space is formed between the inner mold and the outer mold.

3. A TPU mold according to claim 1, characterized in that, The upper end of the positioning frame is fitted with a top cover by a fastening thread. Injection nozzles are installed inside both sides of the positioning frame. One side of the injection nozzle is connected to a pouring pipe, and the inner side of the injection nozzle extends into the interior of the pouring space.

4. A TPU mold according to claim 1, characterized in that, A second bracket is installed on the outside of the positioning frame, and a hydraulic rod is installed inside the second bracket. The front end of the hydraulic rod is installed on the outside of the outer mold.

5. A TPU mold according to claim 1, characterized in that, The disk is fitted with a first bracket, which is placed on the ground.

6. A TPU mold according to claim 1, characterized in that, Positioning plates are fixedly connected to both sides of the lower end of the mounting plate. The positioning plates pass through the positioning frame, and positioning pins are installed inside the positioning frame and the positioning plates.

7. A TPU mold according to claim 1, characterized in that, A belt is movably sleeved on the outside of the lead screw, and a motor is installed on the outside of the belt. Reverse thread grooves are installed on both sides of the lead screw. The front end of the limit pin moves through the positioning frame and is movably sleeved inside the side of the outer mold.

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