Secondary demolding mechanism

Abstract

The utility model discloses a secondary demoulding mechanism which comprises a fixed mould and a movable mould, the movable mould comprises an upper mould plate, a middle mould plate and a lower mould plate, a side mould plate is connected between the lower mould plate and the middle mould plate, a forming cavity is arranged between the lower mould plate and the fixed mould, the middle mould plate is provided with a mould core which penetrates through the lower mould plate and extends into the forming cavity, the middle mould plate is connected with a guide column in a sliding mode, and the guide column is provided with a guide hole. One end of the guide column is connected to the lower mold plate, the other end of the guide column is provided with a limiting part for limiting the middle mold plate from being separated from the guide column, the guide column is sleeved with an elastic piece, an ejector pin plate is arranged between the upper mold plate and the middle mold plate, the ejector pin hole sequentially penetrates through the middle mold plate and the lower mold plate, and an ejector pin rod with one end connected with the ejector pin plate is slidably connected into the ejector pin hole. The mechanism adopts a secondary step-by-step demolding structure, a mold core of a groove in a molded product is firstly pulled out in the first demolding operation, and the product is ejected out by an ejector pin rod for pushing the product in the second demolding operation, so that the product is smoothly demolded, the demolding quality is high, the overall function is complete, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of mold manufacturing, and more specifically, to a secondary demoulding mechanism. Background Art

[0002] When an injection molded product with an inner groove structure is demoulded, due to the overall outer wall demoulding requirements, both the inner and outer walls need a certain draft angle to ensure the surface accuracy of the demoulded product. If a single demoulding operation is used to unload the product, the product will adhere to the mold body due to the mold structure of the inner groove, making it difficult to eject, and it is easy to cause damage to the product surface, resulting in a poor overall effect. Based on this, the utility model proposes a secondary demoulding mechanism. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a secondary demoulding mechanism.

[0004] To solve the above technical problems, the purpose of the utility model is achieved as follows: a secondary demolding mechanism involved in the utility model comprises a fixed mold and a movable mold arranged above the fixed mold, the movable mold comprises an upper mold, a middle mold and a lower mold, a side mold is connected between the lower mold and the middle mold, a molding cavity is provided between the lower mold and the fixed mold, a part of which is opened on the fixed mold and the other part is opened on the lower mold, the middle mold is provided with a mold core which passes through the lower mold and extends into the molding cavity, a guide column is slidably connected to the middle mold, one end of the guide column is connected to the lower mold, and the other end is provided with a limiting portion for limiting the middle mold to escape from the guide column, an elastic member with one end against the middle mold and the other end against the lower mold is sleeved on the guide column, an ejector plate is provided between the upper mold and the middle mold, and also includes an ejector hole which sequentially passes through the middle mold and the lower mold, the ejector hole is communicated with the molding cavity, and an ejector rod with one end connected to the ejector plate is slidably connected in the ejector hole.

[0005] The utility model is further configured as follows: the middle template and the lower template are respectively provided with first positioning grooves for the ends of the elastic members to be buried.

[0006] The utility model is further configured as follows: a second positioning groove for embedding the limiting part is provided on the middle template.

[0007] The utility model is further configured as follows: a working hole is provided on the upper template.

[0008] The utility model is further configured as follows: the elastic member is a compression spring.

[0009] In summary, the utility model has the following beneficial effects: the secondary demoulding mechanism involved in the utility model adopts a secondary step-by-step demoulding structure. The first demoulding operation first draws out the mold core of the inner groove of the molded product, and the second demoulding is performed by the ejector rod that pushes the product out, so that the product demoulding is smooth and the demoulding quality is high. The overall function is complete and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model for reflecting the mold closing state;

[0011] Figure 2 It is a structural schematic diagram of the utility model for reflecting the first pre-demolding state;

[0012] Figure 3 It is a structural schematic diagram of the utility model for reflecting the first demoulding state;

[0013] Figure 4 It is a structural schematic diagram of the utility model for reflecting the second demoulding state. DETAILED DESCRIPTION

[0014] In order to enable those skilled in the art to better understand the technical solution of the utility model, the preferred implementation scheme of the utility model is described below in conjunction with specific embodiments, but it should be understood that these descriptions are only for further illustrating the features and advantages of the utility model, rather than limiting the patent requirements of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0015] The utility model is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0016] Example 1

[0017] See also Figures 1 to 4As shown, a secondary demoulding mechanism involved in this embodiment includes a fixed mold 1 and a movable mold arranged above the fixed mold, the movable mold includes an upper mold plate 2, a middle mold plate 3 and a lower mold plate 4, a side mold plate 5 is connected between the lower mold plate 4 and the middle mold plate 3, a molding cavity 6 is provided between the lower mold plate 4 and the fixed mold 1, a part of which is opened on the fixed mold and the other part is opened on the lower mold plate, a mold core 7 is provided on the middle mold plate 3, which passes through the lower mold plate 4 and extends into the molding cavity 6, and a guide column 8 is slidably connected to the middle mold plate 3. One end of 8 is connected to the lower template 4, and the other end is provided with a limiting portion 9 for limiting the middle template from escaping the guide column. The guide column 8 is sleeved with an elastic member 10 with one end against the middle template and the other end against the lower template. The elastic member 10 is a compression spring. An ejector plate 11 is provided between the upper template 2 and the middle template 3, and also includes an ejector hole 12 that sequentially penetrates the middle template 3 and the lower template 4. The ejector hole 12 is connected to the molding cavity 6, and an ejector rod 13 with one end connected to the ejector plate 11 is slidably connected in the ejector hole 12.

[0018] Furthermore, the middle template 3 and the lower template 4 are respectively provided with a first positioning groove 14 for the end of the elastic member 10 to be buried.

[0019] Furthermore, the middle template 3 is provided with a second positioning groove 15 for the limiting portion 9 to be embedded in.

[0020] Furthermore, a working hole 16 is provided on the upper template 2 .

[0021] In this embodiment, after the product is injection molded, the movable mold moves up. Because the elastic member 10 pushes the lower mold plate 4, in the initial stage of the movable mold movement, only the upper mold plate 2 and the middle mold plate 3 move up. During this period of time, the mold core 7 is gradually pulled out of the molding cavity 6 until the middle mold plate 3 touches the limit portion 9, and the movable mold continues to move up. At this time, the lower mold plate 4 moves up together with the upper mold plate 2 and the middle mold plate 3, so that the molded product is separated from the fixed mold 1 (remaining on the movable mold), and finally the ejector rod 13 extending into the molding cavity 6 pushes the product off the lower mold plate 4 to complete the secondary demolding and unloading.

[0022] The first positioning groove 14 is provided to be used for installation and positioning of the elastic member 10 .

[0023] The second positioning groove 15 is provided to be used for installation and positioning of the limiting portion 9 and to realize a hidden design of the limiting portion 9 .

[0024] The working hole 16 is opened to serve as a power mechanism for connecting and driving the ejector plate 11 .

[0025] The secondary demoulding mechanism involved in the utility model adopts a secondary step-by-step demoulding structure. In the first demoulding operation, the mold core of the inner groove of the molded product is firstly drawn out, and in the second demoulding, the product is ejected by the ejector rod that pushes the product, so that the product demoulding is smooth and the demoulding quality is high. The overall function is perfect and the practicability is strong.

[0026] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationship are based on the orientation or positional relationship actually shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in combination with the embodiments and according to specific circumstances.

[0027] Unless otherwise clearly specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A secondary demoulding mechanism, comprising a fixed mold and a movable mold arranged above the fixed mold, characterized in that: The movable mold comprises an upper mold plate, a middle mold plate and a lower mold plate, a side mold plate is connected between the lower mold plate and the middle mold plate, a molding cavity is provided between the lower mold plate and the fixed mold plate, a part of which is opened on the fixed mold plate and the other part is opened on the lower mold plate, the middle mold plate is provided with a mold core which passes through the lower mold plate and extends into the molding cavity, a guide column is slidably connected to the middle mold plate, one end of the guide column is connected to the lower mold plate, and the other end is provided with a limiting portion for limiting the middle mold plate from escaping from the guide column, an elastic member with one end against the middle mold plate and the other end against the lower mold plate is sleeved on the guide column, an ejector plate is provided between the upper mold plate and the middle mold plate, and also includes an ejector hole that sequentially passes through the middle mold plate and the lower mold plate, the ejector hole is communicated with the molding cavity, and an ejector rod with one end connected to the ejector plate is slidably connected in the ejector hole.

2. The secondary demoulding mechanism according to claim 1, characterized in that: The middle template and the lower template are respectively provided with first positioning grooves for the ends of the elastic members to be buried.

3. The secondary demoulding mechanism according to claim 2, characterized in that: The middle template is provided with a second positioning groove for the limiting part to be embedded.

4. The secondary demoulding mechanism according to any one of claims 1 to 3, characterized in that: The upper template is provided with a working hole.

5. The secondary demoulding mechanism according to claim 1, characterized in that: The elastic member is a compression spring.

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