Mould structure with water gap capable of automatically falling off

Abstract

The utility model discloses a mould structure with a water gap capable of falling off automatically, which belongs to the field of injection moulds and comprises a fixed plate (1), a movable plate (2) and a stripper plate (3), the stripper plate (3) is arranged between the fixed plate (1) and the movable plate (2) and is fixed with the fixed plate (1) through a screw pull rod, and the fixed plate (1) is fixed with the movable plate (2) through the screw pull rod. The movable plate (2) is provided with an avoiding hole (8) matched with the stripper plate (3) in position and shape, the height, higher than the fixed plate (1), of the screw pull rod is smaller than or equal to the thickness of the movable plate (2), the movable plate (2) is further provided with a water gap (7), and runners (9) are arranged on the back face of the movable plate (2), the back face of the stripper plate (3) and the front face of the fixed plate (1). According to the mold disclosed by the utility model, the automatic water gap falling is realized, one worker is reduced, the production cycle is reduced from 30s to 20s, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to a mold structure with automatically falling-off nozzles. Background Art

[0002] In injection molding, depending on the product structure, either a two-plate mold or a three-plate mold is required. For products with more complex structures, a three-plate mold is required. The upper mold of a three-plate mold consists of a fixed plate, a movable plate, and a runner plate. Due to the product structure, the sprue (also known as the "gate") is designed into the runner plate. Current three-plate molds do not automatically remove the sprue, requiring manual removal or the purchase of a dual-arm robot. Either solution compromises production efficiency and increases operating costs, severely impacting business profitability. Summary of the Invention

[0003] The purpose of this utility model is to provide a mold structure with automatically falling-off nozzle to solve the above-mentioned problem.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A mold structure with automatically falling water nozzles comprises a fixed plate, a movable plate and a stripper plate, wherein the stripper plate is arranged between the fixed plate and the movable plate, and the stripper plate is fixed to the fixed plate by a screw pull rod, and an avoidance hole matching the position and shape of the stripper plate is provided on the movable plate, and the height of the screw pull rod above the fixed plate is less than or equal to the thickness of the movable plate, and a water nozzle is also provided, and the water nozzle is located in the fixed plate, between the fixed plate and the movable plate, and in the movable plate; flow channels are provided on the back of the movable plate, the back of the stripper plate, and the front of the fixed plate.

[0006] It should be noted that the flow channel of the movable plate should flow from the back to the front, so a hole is punched in the movable plate for the flow channel. The flow channel on the back is actually on the fixed plate. If the flow channel is on the stripping plate or on the movable plate, there will be a groove, which will affect the drop of the nozzle.

[0007] When the mold is in the clamping state, the two movable plates are in a closed state, and the glue is injected into the runner and cooled, leaving a sprue. Because the glue will enter the cavity from the runner through the movable plate, the thickness of the movable plate is the length of the sprue. Therefore, the sprue will remain on the movable plate after the mold is opened and will not fall off.

[0008] It should be noted that the formation of the sprue is the shape of the flow channel. For ease of understanding, the flow channel can be compared to a curved water pipe. After it is filled with water and frozen, the shape of the curved water pipe is called a sprue.

[0009] As an optimal technical solution, the stripping plate avoids the longitudinal flow channel in the movable plate, the stripping plate is diamond-shaped as a whole, there are three screw rods, and the three screw rods are movably connected to the stripping plate at three adjacent vertices of the stripping plate in an interference fit manner.

[0010] The stripper plate of the present invention is designed according to the shape of the flow channel, including avoiding the longitudinal flow channel (i.e. the glue inlet flow channel inside the movable plate). The stripper plate is limited by the fixed plate when the mold is opened, and the distance between the fixed plate and the movable plate is limited, so that the water outlet is pulled out of the movable plate by the stripper plate and falls. The transverse flow channel, that is, the flow channel where the water outlet is forced out, is designed, which can effectively avoid the longitudinal flow channel and allow part of the transverse flow channel to pass through its back side, ensuring that the water outlet can be effectively brought out when the mold is opened.

[0011] Regarding the aforementioned limitation on the distance between the fixed plate and the movable plate, specifically, the water outlet of the present invention is divided into three parts, one part is inside the movable plate, one part is inside the fixed plate, and one part is between the fixed plate and the movable plate. Therefore, in order to allow the water outlet to separate from the fixed plate and the movable plate, the distance between the stripping plate and the movable plate must be at least greater than the thickness of the movable plate; the distance between the stripping plate and the fixed plate must be at least greater than the thickness of the fixed plate, so that the water outlets inside the two plates can be pulled out and fall off.

[0012] Compared with the prior art, the advantages of the present invention are: the mold structure of the present invention can replace manual work to improve efficiency and reduce labor costs, and there is no need to purchase an additional double-arm robot to reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a diagram of the overall state of Example 1 of the utility model when the mold is opened;

[0014] Figure 2 This is the state diagram when the mold is closed.

[0015] In the figure: 1. Fixed plate; 2. Movable plate; 3. Stripper plate; 4. Screw rod A; 5. Screw rod B; 6. Screw rod C; 7. Water inlet; 8. Avoidance hole; 9. Runner. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Example 1:

[0018] See also Figure 1, a mold structure with automatic sprue falling off, comprising a fixed plate 1, a movable plate 2 and a stripper plate 3, wherein the stripper plate 3 is arranged between the fixed plate 1 and the movable plate 2, and the stripper plate 3 is fixed to the fixed plate 1 by a screw pull rod, and an avoidance hole 8 matching the position and shape of the stripper plate 3 is provided on the movable plate 2, the height of the screw pull rod above the fixed plate 1 is less than or equal to the thickness of the movable plate 2, and the avoidance hole 8 is designed on the back of the movable plate 2 according to the shape of the stripper plate 3, so that the stripper plate 3 can be completely buried when the mold is closed; a sprue 7 is also provided, and the sprue 7 is located in the fixed plate 1, between the fixed plate 1 and the movable plate 2, and in the movable plate 2; a flow channel 9 is provided on the back of the movable plate 2, the back of the stripper plate 3, and the front of the fixed plate 1;

[0019] In this embodiment, the stripper plate 3 is diamond-shaped as a whole, and there are three screw rods, namely screw rod A4, screw rod B5 and screw rod C6. The three screw rods are movably connected to the stripper plate 3 at three adjacent vertices of the stripper plate 3 in an interference fit manner;

[0020] The utility model designs a stripper plate 3 according to product requirements. When the mold is installed, the stripper plate 3 is fixed to the mold fixed plate 1 with three screw rods. The movable plate 2 is designed with an avoidance hole 8 according to the shape of the stripper plate 3. It can move with the opening and closing of the mold through the screw rod connection. The specific principle is as follows:

[0021] (1) The hole connecting the stripper plate 3 and the screw rod is an interference fit with the screw rod, and the stripper plate 3 can move freely on the screw rod and is stopped by the screw rod head;

[0022] (2) The back of the movable plate 2 is designed with an avoidance hole 8 according to the shape of the stripper plate 3 so that it can be completely buried; on the back of the movable plate 2, the back of the stripper plate 3, and the front of the movable plate 1, a flow channel 9 is designed according to product requirements;

[0023] (3) When the mold is closed, Figure 2 As shown, the stripper plate 3 moves along with the movable plate 1. When the mold is completely closed, the stripper plate 3 is entirely embedded in the movable plate 2.

[0024] (4) During injection molding, a sprue 7 is generated according to the designed flow channel shape. The stripper plate 3 can effectively avoid the longitudinal flow channel and allow part of the transverse flow channel to pass through its back, ensuring that the sprue 7 can be effectively brought out when the mold is opened;

[0025] (5) When the mold is opened after the injection molding is cooled, due to the action of the screw rod head, the stripper plate 3 will drive the sprue 7 to move outward along with the movable plate 1;

[0026] (6) When the mold is fully opened, the nozzle 7 is completely separated from the movable plate 2 and falls freely under the action of gravity, thereby completing the automatic detachment of the nozzle 7.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mold structure with automatically falling nozzle, characterized in that: The invention comprises a fixed plate (1), a movable plate (2) and a stripping plate (3), wherein the stripping plate (3) is arranged between the fixed plate (1) and the movable plate (2), and the stripping plate (3) is fixed to the fixed plate (1) by a screw rod, and an avoidance hole (8) matching the position and shape of the stripping plate (3) is provided on the movable plate (2), and the height of the screw rod above the fixed plate (1) is less than or equal to the thickness of the movable plate (2), and a water inlet (7) is also provided, and the water inlet (7) is located in the fixed plate (1), between the fixed plate (1) and the movable plate (2), and in the movable plate (2); a flow channel (9) is provided on the back of the movable plate (2), the back of the stripping plate (3), and the front of the fixed plate (1).

2. A mold structure with automatic nozzle detachment according to claim 1, characterized in that: The stripping plate (3) avoids the longitudinal flow channel in the movable plate (2); the stripping plate (3) is diamond-shaped as a whole; there are three screw pull rods, and the three screw pull rods are movably connected to the stripping plate (3) at three adjacent vertices of the stripping plate (3) in an interference fit manner.

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