Injection mold for lower base plate of four-hole rail

Abstract

The utility model discloses a four-hole rail lower base plate injection mold which comprises a movable mold fixing plate, guide columns are fixedly connected to the four corners of the top of the movable mold fixing plate, an ejector pin floor is arranged at the top of the movable mold fixing plate, an ejector pin panel is arranged at the top of the ejector pin floor, and a movable mold plate is arranged at the top of the ejector pin panel. Guide sleeves are fixedly connected to the four corners in the movable mold plate, the ejector pin panel and the ejector pin floor, positioning holes are symmetrically formed in the two sides of the top of the movable mold plate, a fixed mold is composed of the fixed mold plate, the hot runner plate and the fixed mold fixing plate, a movable mold is composed of the movable mold plate, the ejector pin panel, the ejector pin floor and the movable mold fixing plate, and the ejector pin panel and the ejector pin floor are arranged in the movable mold. The injection cylinder adopts a four-point needle valve type hot runner system to feed glue, no stub bar exists, four products are produced at the same time, the production efficiency can be effectively improved, and waste of raw materials can be avoided by adopting the needle valve type hot runner system.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, and in particular relates to an injection mold for a four-hole rail bottom pad. Background Art

[0002] The four-hole rail pad injection mold is an injection mold used to produce pads under the track. This pad is usually used in railways, subways or other rail transportation systems to support the track, reduce the friction between the track and the ground, prevent the track from sinking, and ensure the smooth operation of the track.

[0003] In the production process of plastic products, the simultaneous production of multiple products often requires the use of complex production lines and equipment to achieve the switching and production of different products. However, traditional production lines often have problems with low production efficiency and waste of raw materials. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a four-hole rail bottom pad injection mold to solve the problem raised in the above background technology that in the production process of plastic products, the simultaneous production of multiple products often requires the use of complex production lines and equipment to achieve the switching and production of different products. However, traditional production lines often have problems of low production efficiency and waste of raw materials.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a four-hole rail lower pad injection mold, comprising a movable mold fixing plate, the top four corners of the movable mold fixing plate are fixedly connected with guide pillars, the top of the movable mold fixing plate is provided with an ejector floor, the top of the ejector floor is provided with an ejector panel, the top of the ejector panel is provided with a movable mold plate, the four corners inside the movable mold plate, the ejector panel and the ejector floor are fixedly connected with guide sleeves, the top of the movable mold plate is symmetrically provided with positioning holes on both sides, the upper end of the outer side of the guide pillar is slidably connected with a fixed mold plate, the top of the fixed mold plate is provided with a hot runner plate, the top of the hot runner plate is provided with a fixed mold fixing plate, a mold body is provided between the fixed mold plate and the movable mold plate, the fixed mold plate, the hot runner plate and the fixed mold fixing plate are provided with injection cylinders, the top of the fixed mold fixing plate is provided with an ejector plate, the bottom of the fixed mold plate is fixedly connected with positioning pillars on both sides, and the top of the movable mold plate is provided with positioning holes on both sides.

[0006] Preferably, the guide sleeve is located outside the guide column and is slidably connected.

[0007] Preferably, the mold body is fixedly connected to the inside of the movable mold plate and the fixed mold plate by bolts, and a mold is provided between the mold bodies at the upper and lower ends.

[0008] Preferably, the injection barrel is a 4-point needle valve hot runner system for glue injection.

[0009] Preferably, the injection cylinder is fixedly connected to the top of the hot runner plate by bolts.

[0010] Preferably, an injection hole is fixedly connected to the top of the top plate.

[0011] Preferably, the injection hole, the fixed mold plate and the hot runner plate are all fixedly connected by bolts.

[0012] Preferably, the positioning column and the positioning hole are matched and are snap-fitted.

[0013] Compared with the prior art, the utility model provides a four-hole rail bottom pad injection mold, which has the following beneficial effects:

[0014] 1. The utility model sets a four-hole rail bottom pad injection mold, which is composed of a fixed mold plate, a hot runner plate and a fixed mold fixing plate, and a movable mold plate, an ejector panel, an ejector floor and a movable mold fixing plate. The injection cylinder adopts a 4-point needle valve hot runner system to feed glue, and there is no material head. Therefore, by producing 4 products at the same time, the production efficiency can be effectively improved, and the needle valve hot runner system can be used to avoid the waste of raw materials.

[0015] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The utility model has a scientific and reasonable structure, is safe and convenient to use, and provides great help to people. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the axial structure of one side of an injection mold for a four-hole rail bottom pad proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of a movable template of a four-hole rail bottom pad injection mold proposed by the utility model;

[0019] Figure 3 This is a schematic diagram of the fixed mold plate structure of a four-hole rail bottom pad injection mold proposed by the utility model;

[0020] Figure 4 This is a schematic cross-sectional structure diagram of a four-hole rail bottom pad injection mold proposed by the utility model;

[0021] In the figure: mold 1, injection cylinder 2, fixed mold plate 3, hot runner plate 4, fixed mold fixing plate 5, movable mold plate 6, ejector panel 7, ejector floor 8, movable mold fixing plate 9, ejector plate 10, guide sleeve 11, positioning column 12, guide column 13, mold body 14, injection hole 15, positioning hole 16. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 The utility model provides a technical solution: a four-hole rail bottom pad injection mold, including a movable mold fixing plate 9, the top four corners of the movable mold fixing plate 9 are fixedly connected with guide pillars 13, the top of the movable mold fixing plate 9 is provided with an ejector floor 8, the top of the ejector floor 8 is provided with an ejector panel 7, the top of the ejector panel 7 is provided with a movable mold plate 6, the four corners of the movable mold plate 6, the ejector panel 7 and the ejector floor 8 are fixedly connected with guide sleeves 11, the top two sides of the movable mold plate 6 are symmetrically provided with positioning holes 16, the upper end of the outer side of the guide pillar 13 is slidably connected with a fixed mold plate 3, the top of the fixed mold plate 3 is provided with a hot runner plate 4, the top of the hot runner plate 4 is provided with a fixed mold fixing plate 5, and there are fixed mold plates 3 and movable mold plates 6 between them. A mold body 14 is provided, and injection cylinders 2 are arranged inside the fixed mold plate 3, the hot runner plate 4 and the fixed mold fixing plate 5. An ejector plate 10 is arranged on the top of the fixed mold fixing plate 5. Positioning columns 12 are fixedly connected to both sides of the bottom of the fixed mold plate 3. Positioning holes 16 are opened on both sides of the top of the movable mold plate 6. The fixed mold plate 3, the hot runner plate 4 and the fixed mold fixing plate 5 are formed into a fixed mold, and the movable mold plate 6, the ejector panel 7, the ejector floor 8 and the movable mold fixing plate 9 are formed into a movable mold. The injection cylinder 2 adopts a 4-point needle valve hot runner system to feed glue, and there is no material head. By producing 4 products at the same time, the production efficiency can be effectively improved. The needle valve hot runner system is adopted to avoid the waste of raw materials.

[0024] In the present invention, preferably, the guide sleeve 11 is located outside the guide column 13 and is slidably connected.

[0025] In the present invention, preferably, the mold body 14 is fixedly connected to the inside of the movable mold plate 6 and the fixed mold plate 3 by bolts, and the mold 1 is provided between the mold bodies 14 at the upper and lower ends.

[0026] In the present invention, preferably, the injection barrel 2 is a 4-point needle valve hot runner system for glue injection.

[0027] In the present invention, preferably, the injection cylinder 2 is fixedly connected to the top of the hot runner plate 4 by bolts.

[0028] In the present invention, preferably, an injection hole 15 is fixedly connected to the top of the top plate 10 .

[0029] In the present invention, preferably, the injection hole 15, the fixed mold plate 5 and the hot runner plate 4 are all fixedly connected by bolts.

[0030] In the present invention, preferably, the positioning column 12 and the positioning hole 16 are matched and are snap-fitted.

[0031] The working principle and use process of the utility model are as follows: when in use, the movable mold fixing plate 9 is connected to the fixed mold plate 3 through the guide column 13, which ensures the precise alignment of the mold during the closing and opening processes. The ejector floor 8, ejector panel 7 and movable mold plate 6 arranged on the movable mold fixing plate 9 together constitute the movable mold part, which is used to form the specific shape of the injection molded product. During the injection molding process, the injection cylinder 2 is injected with glue through a 4-point needle valve hot runner system. The headless design reduces the waste of raw materials and improves the production efficiency. The fixed mold plate 3, the hot runner plate 4 and the fixed mold fixing plate 5 constitute the fixed mold part, wherein the hot runner plate 4 is responsible for guiding the molten plastic into the injection cylinder 2, and the fixed mold fixing plate 5 provides support and sealing for the mold. The mold body 14 is located between the movable mold plate 6 and the fixed mold plate 3, and is connected by bolts to form a mold structure that is symmetrical up and down. The mold 1 is located at the upper and lower ends of the mold body 14, and it can maintain the shape and size of the product during the injection molding process. After the injection molding is completed, the injection hole 15 on the top plate 10 is connected to the fixed mold fixing plate 5 and the hot runner plate 4 by bolts, which is convenient for discharging the molten plastic in the mold and taking out the molded product. In addition, the positioning column 12 on the fixed mold plate 3 is adapted to the positioning hole 16 on the movable mold plate 6. Through the snap connection, it is ensured that the mold can maintain high-precision repeated positioning during the production process. During the entire injection molding process, the guide sleeve 11 is located on the outside of the guide column 13. Through the sliding connection, the smooth movement of the movable mold and the fixed mold during the opening and closing process is guaranteed, while reducing friction and wear, and extending the service life of the mold. Through this series of designs and cooperation, the injection mold can efficiently and accurately complete the production of the four-hole rail bottom pad.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A four-hole rail bottom plate injection mold, including a movable mold fixing plate (9), characterized in that: The movable mold fixing plate (9) is fixedly connected with guide pillars (13) at the four corners of the top, the movable mold fixing plate (9) is provided with an ejector floor (8) at the top, an ejector panel (7) is provided at the top of the ejector floor (8), a movable mold plate (6) is provided at the top of the ejector panel (7), the movable mold plate (6), the ejector panel (7) and the ejector floor (8) are fixedly connected with guide sleeves (11) at the four corners inside, the movable mold plate (6), the ejector panel (7) and the ejector floor (8), positioning holes (16) are symmetrically provided on both sides of the top of the movable mold plate (6), and the upper end of the outer side of the guide pillar (13) is slidably connected with the fixed mold plate (3) A hot runner plate (4) is arranged on the top of the fixed mold plate (3), a fixed mold fixing plate (5) is arranged on the top of the hot runner plate (4), a mold body (14) is arranged between the fixed mold plate (3) and the movable mold plate (6), an injection cylinder (2) is arranged inside the fixed mold plate (3), the hot runner plate (4) and the fixed mold fixing plate (5), a top plate (10) is arranged on the top of the fixed mold fixing plate (5), positioning columns (12) are fixedly connected to both sides of the bottom of the fixed mold plate (3), and positioning holes (16) are opened on both sides of the top of the movable mold plate (6).

2. The four-hole rail bottom plate injection mold according to claim 1, characterized in that: The guide sleeve (11) is located outside the guide column (13) and is slidably connected.

3. The four-hole rail bottom plate injection mold according to claim 1, characterized in that: The mold body (14) is fixedly connected to the inside of the movable mold plate (6) and the fixed mold plate (3) by bolts, and a mold (1) is arranged between the upper and lower ends of the mold body (14).

4. The four-hole rail bottom plate injection mold according to claim 1, characterized in that: The injection cylinder (2) is a 4-point needle valve hot runner system for glue injection.

5. The four-hole rail bottom plate injection mold according to claim 1, characterized in that: The injection cylinder (2) is fixedly connected to the top of the hot runner plate (4) by means of bolts.

6. The four-hole rail bottom plate injection mold according to claim 1, characterized in that: An injection hole (15) is fixedly connected to the top of the top plate (10).

7. The four-hole rail bottom plate injection mold according to claim 6, characterized in that: The injection hole (15), the fixed mold fixing plate (5) and the hot runner plate (4) are all fixedly connected by bolts.

8. The four-hole rail bottom plate injection mold according to claim 1, characterized in that: The positioning column (12) and the positioning hole (16) are matched and are snap-fitted.

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