Polyurethane scraper forming device

Abstract

The utility model relates to the field of polyurethane pouring, in particular to a polyurethane scraper forming device which comprises a base, a vertical injection hole is formed in the base, a forming hole is formed in the base, the upper end face of the injection hole is higher than the upper end face of the forming hole, and a connecting hole communicating the bottom of the forming hole with the bottom of the injection hole is formed in the base. The polyurethane scraper casting mold has the effect of reducing bubbles in the mold in the polyurethane scraper casting process.

Description

Technical Field

[0001] The present application relates to the field of polyurethane casting, and in particular to a polyurethane scraper forming device. Background Art

[0002] At present, polyurethane scrapers are widely used in different fields because of their wide hardness range, high strength, oil resistance, wear resistance and other characteristics. The casting method is often used in the production of polyurethane scrapers.

[0003] Related technology can refer to the Chinese patent with announcement number CN208826975U, which discloses a combined polyurethane injection mold, including a base plate, support columns are fixedly installed at the four corners of the upper end of the base plate, and an adjustment frame is slidably installed on the support columns. A first fixed rotating column is rotatably installed on the outer side of one end of the base plate, and a first lower mold base, a second lower mold base and a third lower mold base are rotatably installed on the first fixed rotating column, and the second lower mold base is located between the first lower mold base and the third lower mold base, and a second fixed rotating column is rotatably installed on the other side of one end of the base plate where the first fixed rotating column is installed, and is symmetrically installed with the first fixed rotating column, and a third upper mold base, a second upper mold base and a first upper mold base are rotatably installed on the second fixed rotating column, and the second upper mold base is located between the third upper mold base and the first upper mold base.

[0004] Regarding the above-mentioned related technologies, when pouring polyurethane, since the polyurethane is poured into the mold from top to bottom, bubbles that are difficult to discharge are generated in the mold, resulting in irreparable defects in the poured polyurethane scraper. Utility Model Content

[0005] In order to reduce bubbles in the mold during the casting process of the polyurethane scraper, the present application provides a polyurethane scraper molding device.

[0006] The present application provides a polyurethane scraper forming device, which adopts the following technical solution:

[0007] A polyurethane scraper forming device comprises a base, wherein the base is provided with a vertical injection hole, the base is provided with a forming hole, the upper end surface of the injection hole is higher than the upper end surface of the forming hole, and the base is provided with a connecting hole connecting the bottom of the forming hole and the bottom of the injection hole.

[0008] By adopting the above technical solution, an injection hole and a molding hole are set on the base, and liquid polyurethane is poured into the molding hole. The liquid polyurethane enters the molding hole along the connecting hole at the bottom of the injection hole. The liquid polyurethane enters the molding hole from bottom to top, avoiding bubbles generated during the pouring process.

[0009] Optionally, a vertical guide rod is provided on the bottom surface of the injection hole.

[0010] By adopting the above technical solution, when pouring the injection hole, the liquid polyurethane flows down along the outer wall of the guide rod, and the guide rod guides the poured polyurethane, so that the air mixed into the liquid polyurethane is reduced during the pouring process, and the bubbles in the polyurethane scraper are effectively reduced.

[0011] Optionally, the base includes an injection mold, a molding hole is opened in the injection mold, and the base is provided with a groove for placing the injection mold.

[0012] By adopting the above technical solution, by opening a molding hole in the injection mold and by placing the injection mold on the base, a detachable connection of the molding hole is achieved. After pouring in the base is completed, the injection mold is removed from the base, which facilitates the removal of the molded polyurethane scraper.

[0013] Optionally, the molding holes are provided in plurality, and the base is provided with a plurality of injection molds along the circumference of the guide rod.

[0014] By adopting the above technical solution, by arranging a plurality of injection molds around the guide rod and arranging a plurality of molding holes on each injection mold, the number and density of the molding holes on the base are effectively realized. After each pouring is completed, a plurality of polyurethane scrapers will be molded at the same time, which effectively improves the efficiency of the polyurethane scraper.

[0015] Optionally, the base is provided with a material storage trough, which is arranged circumferentially along the guide rod.

[0016] By adopting the above technical solution, an annular material storage trough is provided between the base and the guide rod to temporarily store the liquid polyurethane entering the injection hole. Due to the provision of the material storage trough, the material can be uniformly introduced into each injection mold.

[0017] Optionally, the diameter of the guide rod gradually decreases from bottom to top.

[0018] By adopting the above technical solution, the diameter of the guide rod is larger at the top and smaller at the bottom. When pouring into the injection hole, it is convenient to pour liquid polyurethane onto the guide rod, effectively preventing the liquid polyurethane from pouring out of the injection hole.

[0019] Optionally, the base is provided with a driving motor for driving the guide rod to rotate.

[0020] By adopting the above technical solution, a driving motor is installed on the base to drive the guide rod, thereby achieving slow rotation of the guide rod. When the guide rod rotates slowly, the liquid polyurethane in the injection hole enters each injection mold evenly, thereby achieving uniform distribution of each injection mold.

[0021] Optionally, a ring groove is provided on the lower end surface of the injection mold, and a ring-shaped protrusion adapted to the ring groove is provided on the upper end surface of the injection mold.

[0022] By adopting the above technical solution, when the injection molds are stacked, the annular protrusion on the lower end surface of the upper injection mold is embedded in the groove located upwardly below. The stacked injection molds are limited by the annular block and the groove.

[0023] In summary, the present application includes at least one of the following beneficial technical effects of the polyurethane scraper forming device:

[0024] 1. Set the injection hole and the forming hole on the base, pour the liquid polyurethane into the forming hole, and the liquid polyurethane enters the forming hole along the connecting hole at the bottom of the injection hole. The liquid polyurethane enters the forming hole from bottom to top, avoiding bubbles generated during the pouring process;

[0025] 2. When pouring into the injection hole, the liquid polyurethane flows down along the outer wall of the guide rod. The guide rod guides the poured polyurethane, thereby reducing the amount of air mixed into the liquid polyurethane during the pouring process, and effectively reducing the bubbles in the polyurethane scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The utility model is a schematic diagram of the overall structure of a polyurethane scraper forming device.

[0027] Figure 2 It is a schematic diagram of the internal cross-section of the device.

[0028] Figure 3 It is a schematic diagram of the internal cross-section in Example 2.

[0029] Figure 4 It is a cross-sectional schematic diagram of the injection mold in Example 2.

[0030] Explanation of the reference numerals: 1. base; 11. connecting hole; 12. material storage tank; 13. groove; 14. driving motor; 2. injection hole; 21. guide rod; 3. injection mold; 31. molding hole; 32. annular groove; 33. annular protrusion. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0032] The embodiment of the present application discloses a polyurethane scraper forming device.

[0033] Embodiment 1:

[0034] Reference Figure 1 A polyurethane scraper molding device comprises a base 1, wherein the base 1 comprises a groove 13, an injection mold 3, an injection hole 2 and a connecting hole 11. Liquid polyurethane is injected into the injection hole 2, and the liquid polyurethane flows into the injection mold 3 through the connecting hole 11, and the injection molding is completed after the molding is taken out.

[0035] Reference Figure 1 The injection mold 3 is arranged on the base 1, and a groove 13 for installing the injection mold 3 is arranged on the base 1. When in use, the injection mold 3 is placed in the groove 13 in the base 1 to realize the installation of the installation mold, which effectively simplifies the installation difficulty of the installation mold. After the injection molding is completed, the injection mold 3 is taken out of the groove 13 of the base 1 to facilitate the demoulding of the polyurethane scraper.

[0036] Reference Figure 2 The injection mold 3 is provided with a forming hole 31, the upper end surface of the injection hole 2 is higher than the upper end surface of the forming hole 31, and the base 1 is provided with a connecting hole 11 connecting the bottom of the forming hole 31 with the bottom of the injection hole 2. When the polyurethane scraper is poured, the polyurethane is poured into the injection hole 2, and the liquid polyurethane flows to the bottom of the forming hole 31 through the connecting hole 11 at the bottom of the injection hole 2. As the liquid polyurethane is continuously poured into the injection hole 2, the liquid polyurethane 1 is poured from bottom to top. Compared with pouring directly into the forming hole 31, pouring from bottom to top has the following advantages: since the liquid polyurethane first enters the injection hole 2 and then fills the forming hole 31 upward, the bubbles generated during the injection molding process can be greatly reduced, and the strength of the pouring can be effectively guaranteed.

[0037] according to Figure 2 A vertical guide rod 21 is provided on the bottom surface of the injection hole 2. When pouring liquid polyurethane into the injection hole 2, the polyurethane is poured onto the guide rod 21, so that the polyurethane flows downward along the outer wall of the guide rod 21, effectively slowing down the flow speed of the liquid polyurethane. As the liquid polyurethane slowly flows along the guide rod 21, the bubbles therein are slowly discharged, and the mixing of new bubbles into the polyurethane can be effectively reduced.

[0038] according to Figure 2 The base 1 is provided with a material storage tank 12, which is arranged circumferentially along the guide rod 21. The material storage tank 12 is arranged at the position where the base 1 is connected to the guide rod 21. When the liquid polyurethane enters the base 1 along the injection hole 2, it directly enters the material storage tank 12. When the liquid polyurethane fills the material storage tank 12, it enters the injection mold 3 through the connecting hole 11. Since the polyurethane enters the material storage tank 12 first, it can enter each injection mold 3 at the same time and evenly.

[0039] Reference Figure 2, each injection mold 3 is provided with 5 molding holes 31, and the base 1 is provided with four injection molds 3 along the circumference of the guide rod 21. A plurality of injection molds 3 are arranged around the guide rod 21, and a plurality of molding holes 31 are arranged in parallel on each injection mold 3. By arranging a plurality of injection molds 3 on the base 1 and arranging a plurality of molding holes 31 on each mold, when pouring each time, the liquid polyurethane in the injection hole 2 enters each injection mold 3 through the connecting hole 11. Due to the principle of communicating vessels, the liquid levels in each injection mold 3 rise synchronously. The pouring of multiple polyurethane scrapers will be completed each time pouring, which greatly improves the efficiency of pouring.

[0040] Embodiment 2:

[0041] Reference Figure 3 In this embodiment, the diameter of the guide rod 21 gradually decreases from bottom to top. Since the diameter of the guide rod 21 is smaller at the top and larger at the bottom, compared with the guide rod 21 with the same diameter at the top and bottom, it is easier to pour the liquid polyurethane into the injection hole 2, effectively preventing the liquid polyurethane from being poured out of the injection hole 2.

[0042] Reference Figure 3 The base 1 is provided with a driving motor 14 for driving the guide rod 21 to rotate. By installing the driving motor 14 on the base 1, when pouring liquid polyurethane into the injection hole 2, the driving motor 14 drives the guide rod 21 to rotate slowly. Since the liquid polyurethane is relatively viscous, the slow rotation of the guide rod 21 allows the liquid polyurethane to be evenly distributed around the guide rod 21, which is conducive to the liquid polyurethane flowing into the injection mold 3.

[0043] according to Figure 3 and Figure 4 The lower end surface of the injection mold 3 is provided with an annular groove 32, and the upper end surface of the injection mold 3 is provided with an annular protrusion 33 adapted to the annular groove 32. When the injection mold 3 is installed before pouring, the injection mold 3 is stacked up and down, and the annular groove 32 of the injection mold 3 located at the upper side is connected with the annular protrusion 33 of the injection mold 3 located at the lower side, and the connection of the injection mold 3 is achieved by embedding the annular protrusion 33 in the annular groove 32. After the injection mold 3 is installed, liquid polyurethane is poured into the injection hole 2 to pour the polyurethane scraper. After the pouring is completed, the base 1 is taken out of the injection mold 3, and the stacked injection molds 3 are separated. The length of each section of the polyurethane scraper is measured and the poured polyurethane is cut.

[0044] The implementation principle of a polyurethane scraper forming device in an embodiment of the present application is as follows: by providing a casting mold with a forming hole 31, an injection hole 2 and a connecting hole 11, liquid polyurethane is allowed to enter the forming hole 31 from bottom to top, effectively avoiding the problem of bubbles generated by injecting liquid polyurethane from top to bottom. By providing a guide rod 21, the liquid polyurethane is allowed to slowly flow into the injection hole 2 along the guide rod 21 during casting, further reducing bubbles during casting.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A polyurethane scraper forming device, comprising a base (1), Features: The base (1) is provided with a vertical injection hole (2), the base (1) is provided with a molding hole (31), the top of the injection hole (2) is higher than the top of the molding hole (31), and the base (1) is provided with a connecting hole (11) connecting the bottom of the molding hole (31) and the bottom of the injection hole (2).

2. A polyurethane scraper forming device according to claim 1, Features: A vertical guide rod (21) is provided on the bottom surface of the injection hole (2).

3. A polyurethane scraper forming device according to claim 1, Features: The base (1) comprises an injection mold (3), a molding hole (31) is provided in the injection mold (3), and the base (1) is provided with a groove (13) for placing the injection mold (3).

4. A polyurethane scraper forming device according to claim 3, Features: A plurality of molding holes (31) are provided, and a plurality of injection molds (3) are provided on the base (1) along the circumference of the guide rod (21).

5. A polyurethane scraper forming device according to claim 4, Features: The base (1) is provided with a material storage trough (12), and the material storage trough (12) is arranged along the circumference of the guide rod (21).

6. A polyurethane scraper forming device according to claim 2, Features: The diameter of the guide rod (21) gradually decreases from bottom to top.

7. A polyurethane scraper forming device according to claim 2, Features: The base (1) is provided with a driving motor (14) for driving the guide rod (21) to rotate.

8. A polyurethane scraper forming device according to claim 3, Features: The lower end surface of the injection mold (3) is provided with an annular groove (32), and the upper end surface of the injection mold (3) is provided with an annular convex block (33) adapted to the annular groove (32).

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