Injection mold

Abstract

The utility model relates to the field of molds, and provides an injection mold which comprises a front mold and a rear mold, the front mold is provided with a front mold core and a sliding block; the rear mold is provided with a rear mold core and a shovel base; the sliding block comprises a protruding block penetrating into the cavity of the front mold core and an ejector block matched with the shovel base in an abutting mode. The shovel base is provided with an abutting inclined surface which is inclined towards the cavity of the front mold core; and the front mold core, the rear mold core and the sliding block are closed to form a product cavity. A shovel base and a sliding block which are matched with each other are arranged between the front mold and the rear mold, and stroke change is formed through inclined plane change of the abutting inclined plane. In this way, during mold closing, the shovel base abuts against the sliding block, the sliding block is pushed to move in the direction of the product cavity, the product cavity is formed by the front mold core and the rear mold core, operation such as punching or slotting can be formed in the product cavity through the sliding block, and movement of the sliding block and mold closing and mold splitting of the injection mold are conducted synchronously; normal operation of the mold is guaranteed, and demolding of a product is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of molds, specifically to an injection mold. Background Technology

[0002] A mold is a set of molds and tools used in industrial production to obtain desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. In short, a mold is a tool used to create shaped objects; this tool is composed of various parts, and different molds are composed of different parts. It primarily achieves the shaping of objects by changing the physical state of the material being molded.

[0003] A mold is a tool used to shape a blank into a part with a specific shape and size under external force. It is widely used in blanking, die forging, cold heading, extrusion, powder metallurgy pressing, pressure casting, and compression molding or injection molding of engineering plastics, rubber, ceramics, and other products. A mold has a specific contour or internal cavity shape. Using a contour shape with cutting edges allows the blank to be separated along the contour line (blanking). Using the internal cavity shape allows the blank to obtain a corresponding three-dimensional shape. A mold generally consists of two parts: a moving mold and a fixed mold (or a punch and a die), which can be separated and joined. When separated, the part is removed; when joined, the blank is injected into the mold cavity for shaping. Molds are precision tools with complex shapes, bearing the expansion force of the blank. They have high requirements for structural strength, rigidity, surface hardness, surface roughness, and machining accuracy. The development level of mold manufacturing is one of the important indicators of the level of mechanical manufacturing.

[0004] The various designs in a product make the mold design more complex, and the parting surface design alone is no longer sufficient to meet the design requirements. For example, when a hole or groove structure or a hook-like structure needs to be injection molded into the product, it cannot meet the product design requirements; or, it is easy to produce concave or flash on the product surface. Utility Model Content

[0005] The purpose of this invention is to provide an injection mold that improves the relatively poor structural design of existing molds for forming holes and grooves.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an injection mold, comprising a front mold and a rear mold configured to be closed or separated from the front mold;

[0007] The front mold is provided with a front mold core and a slider that moves toward or away from the cavity of the front mold core; the rear mold is provided with a rear mold core and a spade base that abuts against or separates from the slider;

[0008] The slider includes a protrusion extending into the cavity of the front mold core and a top block that abuts against the shovel base; the shovel base is provided with a top abutting slope inclined toward the cavity of the front mold core;

[0009] The front mold core, the rear mold core, and the slider are closed to form a product cavity.

[0010] Preferably, the shovel base has a station slope on one side relative to the top abutment slope, the parting surface of the front mold has a groove for accommodating the slider, and the side of the groove away from the front mold core cavity has an inclined sidewall that cooperates with the station slope.

[0011] Preferably, the protrusion is provided with a stepped surface that decreases in the direction of the cavity of the front mold core, and the side wall of the front mold core is provided with a stepped groove for the protrusion to move.

[0012] Preferably, a spring is provided between the slider and the front mold core, and a placement groove for limiting and placing the spring is provided on the slider.

[0013] Preferably, the rear mold includes a rear plate, an ejector plate, a spade plate, and a rear mold core plate stacked sequentially. A travel cavity is provided between the rear plate and the spade plate for the ejector plate to move toward or away from the rear mold core plate. The spade plate passes through the rear mold core plate, and the rear mold core is disposed on the rear mold core plate.

[0014] Preferably, the ejector pins on the ejector plate are arranged to pass through the shovel base plate and the rear mold core in sequence.

[0015] Preferably, the front mold includes a top plate, an injection plate, and a front mold core plate stacked sequentially. The injection plate is provided with an injection pipe that connects to the cavity of the mold core plate, and the top plate is provided with an injection port that connects to the injection pipe of the injection plate.

[0016] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0017] 1. A mating spade base and slider are installed between the front and rear molds. The stroke changes by altering the inclination of the abutment slope. During mold closing, the spade base and slider abut against each other, pushing the slider towards the product cavity. Together with the front and rear mold cores, they form the product cavity. The slider allows for operations such as drilling or grooving within the product cavity. Furthermore, the slider's movement is synchronized with the mold closing and opening, ensuring normal mold operation and facilitating product demolding.

[0018] 2. The product cavity is formed by the front mold core, rear mold core and slider after mold closing, which can ensure the precision of the fit and avoid flash. At the same time, it can avoid the problem of scratches caused by the push block structure, thus improving the quality of product production. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the injection mold described in this utility model;

[0020] Figure 2 This is a cross-sectional view of the rear mold portion of the injection mold described in this utility model;

[0021] Figure 3 This is a cross-sectional view of the front mold portion of the injection mold described in this utility model;

[0022] Figure 4 for Figure 3 Enlarged view of the circle marked A in the middle;

[0023] Figure 5 This is a schematic diagram of the slider of the injection mold described in this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Front mold; 101. Front mold core; 102. Slider; 103. Groove; 104. Spring;

[0026] 105. Top plate; 106. Injection plate; 107. Front mold core plate;

[0027] 1011, stepped groove;

[0028] 1021. Bump; 1022. Top block; 1023. Stepped surface; 1024. Placement slot;

[0029] 1031. Inclined sidewall;

[0030] 20. Rear mold; 201. Rear mold core; 202. Shovel base;

[0031] 203. Rear plate; 204. Ejector plate; 205. Shovel base plate; 206. Rear mold core plate;

[0032] 2021, Top-stop slope; 2022, Workstation slope. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0034] Additionally, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are all based on the orientation or positional relationship shown in the accompanying drawings. They are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element of this utility model must have a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] When an element is referred to as being "fixed to," "set on," or "contained on" another element, it can be directly on or indirectly on that other element. When an element is referred to as being "connected to," it can be directly connected to or indirectly connected to that other element.

[0036] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Example

[0038] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment provides an injection mold, including a front mold 10 and a rear mold 20 disposed together or separated from the front mold 10; the front mold 10 is provided with a front mold core 101 and a slider 102 that moves toward or away from the cavity of the front mold core 101; the rear mold 20 is provided with a rear mold core 201 and a shovel base 202 disposed together or separated from the slider 102; the slider 102 includes a protrusion 1021 that penetrates into the cavity of the front mold core 101 and a top block 1022 that abuts against the shovel base 202; the shovel base 202 is provided with abutting slope 2021 that is inclined toward the cavity of the front mold core 101; after the front mold core 101, the rear mold core 201 and the slider 102 are closed, a product cavity is formed.

[0039] Specifically, the injection mold uses the actions of mold closing and mold opening as its power source, which in turn drives the movement between the shovel base 202 and the slider 102. After the front mold 10 and the rear mold 20 are closed, the top inclined surface 2021 of the shovel base 202 cooperates with the slider 102, pushing the slider 102 toward the cavity of the front mold core 101. Thus, when the mold closing is completed, the front mold core 101, the rear mold core 201 and the slider 102 are closed to form the product cavity. In the part of the slider 102 whose protrusion 1021 is located in the product cavity, through holes, grooves 103 or printing structures can be formed.

[0040] After the front mold 10 and the rear mold 20 separate, the shovel base 202 and the slider 102 also separate. The slider 102 can be reset by the spring 104, or it can be reset by an independent cylinder at the same time, waiting for the next mold closing operation. This process is repeated to complete the corresponding injection molding production.

[0041] Specifically, such as Figure 3 and Figure 4 As shown, in this embodiment, a spring 104 is provided between the slider 102 and the front mold core 101, and a placement groove 1024 for limiting the placement of the spring 104 is provided on the slider 102. With the installation of the spring 104, after the front mold 10 and the rear mold 20 are separated, the shovel base 202 and the slider 102 are also separated, and the slider 102 can be reset by the spring 104.

[0042] like Figure 3 and Figure 4 As shown, in this embodiment, a station slope 2022 is provided on the side of the shovel base 202 opposite to the top abutment slope 2021. The parting surface of the front mold 10 is provided with a groove 103 for accommodating the slider 102. An inclined sidewall 1031 that mates with the station slope 2022 is provided on the side of the groove 103 away from the cavity of the front mold core 101. The design of the top abutment slope 2021 and the station slope 2022 makes the top of the shovel base 202 form a trapezoidal platform or a frustum, which facilitates insertion into the groove 103 (the groove 103 can also form a flared structure facing the shovel base 202 through the design of the slider 102 and the inclined sidewall 1031, that is, the side of the slider 102 that mates with the top of the shovel base 202 is an inclined surface), improving the smoothness of the structural fit and effectively avoiding the problems of top abutment jamming or wear.

[0043] like Figure 4 and Figure 5 As shown, in this embodiment, the protrusion 1021 is provided with a stepped surface 1023 that decreases in the direction of the cavity towards the front mold core 101, and a stepped groove 1011 for the protrusion 1021 to move is provided through the side wall of the front mold core 101. The structure of the protrusion 1021 can be designed according to requirements, such as an elliptical axis, a regular polygonal axis, or a splined axis, etc. Textures can also be provided on the end face of the protrusion 1021, so that the required structure can be designed on the product. Furthermore, through the cooperation of the stepped groove 1011 and the stepped surface 1023, the stroke of the protrusion 1021 moving towards the cavity can be limited, that is, the position of the stepped surface 1023 of the stepped groove 1011 and the stepped surface 1023 of the protrusion 1021 abuts and limits the movement, so that the part of the slider 102 that extends into the product cavity is precisely dimensionally limited, thereby improving the quality of product manufacturing.

[0044] like Figure 1 and Figure 2As shown, in this embodiment, the rear mold 20 includes a rear plate 203, an ejector plate 204, a spade plate 205, and a rear mold core 201 plate stacked sequentially. A travel cavity is provided between the rear plate 203 and the spade plate 205 for the ejector plate 204 to move toward or away from the rear mold core 201 plate. The spade plate 205 is disposed through the rear mold core 201 plate, and the rear mold core 201 is disposed on the rear mold core 201 plate. Through the multi-level plate structure assembly, it is convenient to set the structure on each plate. Through combined molding, the rear mold 20 has multiple functions, so that the injection mold can operate smoothly.

[0045] Specifically, the rear mold core 201 plate can be used to install the rear mold core 201, while the spade base plate 205 is used to install the spade base 202 and to distinguish it from the mold core plate; the ejector plate 204 can eject the product that has been injected into the cavity of the rear mold core 201 to achieve the purpose of demolding; and the rear plate 203 is the end face support plate, which serves the functions of protection and handling.

[0046] Furthermore, such as Figure 1 and Figure 2 As shown, in this embodiment, the ejector pins on the ejector plate 204 are arranged to pass through the shovel base plate and the rear mold core 201 in sequence. Thus, after the front mold 10 and the rear mold 20 are separated, the ejector plate 204 is pushed towards the rear mold core 201 by the cylinder, so that the ejector pins eject the product from the cavity of the rear mold core 201, thereby achieving the purpose of product demolding.

[0047] like Figure 1 and Figure 3 As shown, in this embodiment, the front mold 10 includes a top plate 105, an injection plate 106, and a front mold core 101 plate stacked sequentially. The injection plate 106 is provided with an injection pipe that connects to the cavity of the mold core plate, and the top plate 105 is provided with an injection port that connects to the injection pipe of the injection plate 106. Specifically, the multi-layer structure facilitates the design of the structure of each layer, thereby forming the functions required by the mold. The required pipes are set or installed on the injection plate 106 so that the injection material can be guided and delivered to the product cavity through the injection port on the top plate 105. The front mold core 101 plate is used to install the front mold core 101 and the slider 102. This facilitates the design of structural features at different levels and improves practicality.

[0048] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An injection mold, characterized in that: It includes a front mold and a rear mold that is molded or separated with the front mold; The front mold is provided with a front mold core and a slider that moves toward or away from the cavity of the front mold core; the rear mold is provided with a rear mold core and a shovel base that is arranged to abut against or be separated from the slider; The slider includes a convex block penetrating into the front mold core cavity and a top block cooperating with the shovel base; the shovel base is provided with a top abutting inclined surface inclined toward the front mold core cavity; The front mold core, the rear mold core and the slider are molded together to form a product cavity.

2. The injection mold according to claim 1, characterized in that: The shovel base is provided with a station slope on one side relative to the top slope, the parting surface of the front mold is provided with a groove for accommodating the slider, and the groove is provided with an inclined side wall cooperating with the station slope on the side away from the front mold core cavity.

3. The injection mold according to claim 1, characterized in that: The protrusion is provided with a stepped surface which decreases gradually in the direction of the cavity of the front mold core, and the side wall of the front mold core is penetrated with a stepped groove for the protrusion to move.

4. The injection mold according to claim 1 or 2, characterized in that: A spring is arranged between the slide block and the front mold core, and a placement groove for placing the spring with a limited position is arranged on the slide block.

5. The injection mold according to claim 1, characterized in that: The rear mold includes a rear plate, an ejector plate, a shovel base plate and a rear mold core plate which are stacked in sequence, and a travel cavity is provided between the rear plate and the shovel base plate for the ejector plate to move toward or away from the rear mold core plate; the shovel base plate passes through the rear mold core plate, and the rear mold core is provided on the rear mold core plate.

6. The injection mold according to claim 5, characterized in that: The ejector pins on the ejector pin plate are sequentially arranged through the shovel base plate and the rear mold core.

7. The injection mold according to claim 1, characterized in that: The front mold includes a top plate, an injection plate and a front mold core plate which are stacked in sequence. The injection plate is provided with an injection pipeline connected to the mold core plate cavity, and the top plate is provided with an injection port connected to the injection pipeline of the injection plate.

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