Structure for ejecting stub bar in advance

Abstract

The utility model discloses a stub bar advanced ejection structure which comprises a mold core plate, an ejector pin plate, a stub bar plate, an ejector pin, a stub bar rod, a stub bar and a stub bar connecting piece, the ejector pin plate is vertically connected to the mold core plate in a sliding mode and located below the mold core plate, the stub bar plate is vertically connected to the mold core plate in a sliding mode and located below the ejector pin plate, and the bottom end of the ejector pin is fixed to the ejector pin plate. The top end of the ejector pin penetrates through the mold core plate in a sliding mode, the stub bar is arc-shaped, the first end of the stub bar is connected to the top end of the stub bar rod in a swinging mode, a containing cavity capable of containing the stub bar is formed in the stub bar connecting piece, a first stub bar opening and a second stub bar opening which communicate with the two ends of the containing cavity are formed in the top end of the stub bar connecting piece, and the second end of the stub bar can stretch out of the second stub bar opening. The bottom end of the workpiece can make contact with the top end of the ejector pin and the second end of the stub bar, the second end of the stub bar can be driven by the stub bar plate to be separated from the workpiece, and the ejector pin can eject the workpiece away from the mold core plate. The mold is easy to demold.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mould especially relates to a material head advance ejection structure. BACKGROUND

[0002] With the development of the times, industrial production technology is also developing rapidly, and injection mold is also applied in industrial production more and more, the mold usually needs to use the material head to assist injection in the injection process, when injection is completed, the material head and the workpiece are connected together, and in the demolding process, the material head and the workpiece are connected together, which is easy to cause demolding difficulty, and manual demolding may be needed, which leads to low demolding efficiency, lacks competitiveness in the industrial field of emphasizing cost reduction and efficiency improvement, and is not conducive to large-scale promotion and industrial production. UTILITY MODEL CONTENT

[0003] In order to overcome the above defects, the utility model provides a material head advance ejection structure, which has the advantages of easy demolding.

[0004] The utility model discloses a material head advance ejection structure, which comprises a die core plate, a ejector rod plate, a material head plate, a ejector pin, a material head rod, a material head and a material head connecting piece, the ejector rod plate is vertically slidably connected to the die core plate below the die core plate, the material head plate is vertically slidably connected to the die core plate below the ejector rod plate, the bottom end of the ejector pin is fixed to the ejector rod plate, the top end of the ejector pin is slidably arranged in the die core plate, the bottom end of the material head rod is fixed to the material head plate, the top end of the material head rod is slidably arranged in the die core plate, the material head is arc-shaped, the first end of the material head is swingably connected to the top end of the material head rod, a fixing hole capable of accommodating the material head connecting piece is formed in the die core plate, a cavity capable of accommodating the material head is formed in the material head connecting piece, a first material head opening and a second material head opening communicating both ends of the cavity are formed in the top end of the material head connecting piece, the material head can be inserted into the cavity through the first material head opening, the second end of the material head can be extended out of the second material head opening, the bottom end of the workpiece can contact the top end of the ejector pin and the second end of the material head, the material head plate can be driven to move upward by external force and press the ejector rod plate, the second end of the material head can be driven to separate from the workpiece by the material head plate, the ejector rod plate and the ejector pin can be driven to move upward by the material head plate, and the ejector pin can lift the workpiece away from the die core plate.

[0005] Optionally, the die core plate comprises a fixed plate and a die core, a fixing hole is formed in the top surface of the fixed plate, and the die core is fixed in the fixing hole.

[0006] As optionally, it further comprises a first connecting pin, a second connecting pin and a bottom plate, the bottom plate is arranged below the material head plate, the top end of the first connecting pin is fixed to the fixed plate, the top pin plate is provided with a first connecting hole, the first connecting pin is slidably arranged in the first connecting hole, the bottom end of the second connecting pin is fixed to the bottom plate, the top pin plate is provided with a clearance hole, the second connecting pin is arranged in the clearance hole, the material head plate is provided with a second connecting hole, and the second connecting pin is slidably arranged in the second connecting hole.

[0007] As optionally, it further comprises a first spring, the first spring is sleeved on the first connecting pin, and the two ends of the first spring abut against the bottom surface of the fixed plate and the top surface of the top pin plate respectively.

[0008] As optionally, it further comprises a second spring, the second spring is sleeved on the second connecting pin, and the two ends of the second spring abut against the bottom surface of the fixed plate and the top surface of the material head plate respectively.

[0009] As optionally, it further comprises a connecting rod, the first end of the connecting rod is fixed to the top end of the material head rod, the first end of the material head is swingably connected to the second end of the connecting rod through a rotating shaft, and the top surface of the mold core is provided with a first notch for the extension of the connecting rod.

[0010] As optionally, the mold core plate is provided with a first through hole and a second through hole, the top pin is slidably arranged in the first through hole, the top end of the top pin can extend out of the first through hole, and the material head rod is slidably arranged in the second through hole, and the top end of the material head rod can extend out of the second through hole.

[0011] As optionally, the material head connecting piece comprises two mutually abutting connecting blocks, the connecting blocks are provided with arc-shaped notches on opposite surfaces, and the arc-shaped notches of the two connecting blocks can form a cavity.

[0012] As optionally, it further comprises two side plates and a pressing plate, the pressing plate is fixed to the bottom surface of the top pin plate, the bottom surface of the pressing plate is provided with a second notch for accommodating the material head plate, the top end of the side plate is fixed to the bottom surface of the fixed plate, the bottom end of the side plate is fixed to the top surface of the bottom plate, the top pin plate, the material head plate and the pressing plate are arranged between the two side plates, and the bottom end of the pressing plate is provided with a buffer.

[0013] As optionally, the bottom plate is provided with an opening corresponding to the material head plate.

[0014] The beneficial technical effect of the utility model discloses: the material head advance ejection structure, including: the mould core board, the thimble board, the material head board, the thimble, the material head pole, the material head and the material head connecting piece, after injection molding is completed, the bottom surface of workpiece is close to the top surface of mould core board, and the top end of thimble and the second end of material head connect workpiece, when needing to demould, material head board moves up under the drive of external force, material head also moves up under the drive of material head board, the second end of material head separates workpiece first in the process of moving up, then whole material head separates the cavity, after material head separates the cavity, material head board continues to move up and then extrudes the bottom surface of thimble board, thimble board also moves up together under the extrusion of material head board, thimble drives workpiece to separate mould core board under the drive of thimble board, since the second end of material head has separated workpiece at this time, thimble only needs smaller force to separate workpiece from mould core board, can make workpiece more easily demould. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the three-dimensional view of the utility model complete machine;

[0016] Figure 2 It is the utility model complete machine cross section view of material head and thimble all in the state of not ejecting;

[0017] Figure 3 It is the utility model complete machine cross section view of material head in the process of ejecting;

[0018] Figure 4 It is the utility model complete machine cross section view of material head in the state of ejecting;

[0019] Figure 5 It is the utility model complete machine cross section view of material head and thimble all in the state of ejecting;

[0020] Among them:

[0021] 1, thimble board;2, material head board;3, thimble;4, material head pole;5, material head;6, material head connecting piece;7, fixed plate;8, mould core;9, first connecting pin;10, second connecting pin;11, bottom plate;12, workpiece;13, side plate;14, pressing plate;15, buffer. DETAILED DESCRIPTION

[0022] In order to more clearly understand the technical means of the utility model, and can be implemented according to the content of the specification, the specific embodiment of the utility model is further described in detail below, the following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0023] The specific embodiment of the application in detail records the material head advance ejection structure, such as Figures 1-5As shown, the material head pre-ejection structure includes a mold plate, a ejector plate 1, a material head plate 2, an ejector pin 3, a material head rod 4, a material head 5 and a material head connecting piece 6, the ejector plate 1 is vertically and slidingly connected to the mold plate below the mold plate, the material head plate 2 is vertically and slidingly connected to the mold plate below the ejector plate 1, the bottom end of the ejector pin 3 is fixed to the ejector plate 1, the top end of the ejector pin 3 is slidingly arranged in the mold plate, the bottom end of the material head rod 4 is fixed to the material head plate 2, the top end of the material head rod 4 is slidingly arranged in the mold plate, the material head 5 is arc-shaped, the first end of the material head 5 is swingably connected to the top end of the material head rod 4, the mold plate is provided with a fixing hole capable of accommodating the material head connecting piece 6, the material head connecting piece 6 is provided with a cavity capable of accommodating the material head 5, the top end of the material head connecting piece 6 is provided with a first material head opening and a second material head opening communicating with both ends of the cavity, the material head 5 can extend into the cavity through the first material head opening, the second end of the material head 5 can extend out of the second material head opening, the bottom end of the workpiece 12 can contact the top end of the ejector pin 3 and the second end of the material head 5, the material head plate 2 can move upwards under the drive of an external force to press the ejector plate 1, the second end of the material head 5 can be separated from the workpiece 12 under the drive of the material head plate 2, the ejector plate 1 and the ejector pin 3 can move upwards under the pressing of the material head plate 2, and the ejector pin 3 can lift the workpiece 12 away from the mold plate. After injection molding is completed, the bottom surface of the workpiece is tightly attached to the top surface of the mold plate, and the top end of the ejector pin 3 and the second end of the material head 5 are connected to the workpiece. The reason why the top end of the ejector pin 3 and the second end of the material head 5 are connected to the workpiece is that the workpiece is adhered to the top end of the ejector pin 3 and the second end of the material head 5 during the solidification process. When demolding is needed, the material head plate 2 moves upwards under the drive of an external force, such as being lifted upwards by a pneumatic cylinder. The material head 5 also moves upwards under the drive of the material head plate 2. During the upward movement of the material head 5, the second end of the material head 5 is first separated from the workpiece, and then the entire material head 5 is separated from the cavity. After the material head 5 is separated from the cavity, the material head plate 2 continues to move upwards to press the bottom surface of the ejector plate 1. The ejector plate 1 also moves upwards together under the pressing of the material head plate 2. The ejector pin 3 lifts the workpiece away from the mold plate under the drive of the ejector plate 1. Since the second end of the material head 5 has been separated from the workpiece at this time, the ejector pin 3 only needs a small force to lift the workpiece away from the mold plate, which can make the workpiece easier to demold. The material head pre-ejection structure has the advantage of easy demolding.

[0024] Optionally in the embodiment, the mold plate includes a fixed plate 7 and a mold 8, the top surface of the fixed plate 7 is provided with a fixing hole, and the mold 8 is fixed in the fixing hole.

[0025] Optionally, the embodiment further comprises a first connecting pin 9, a second connecting pin 10 and a bottom plate 11, the bottom plate 11 is arranged below the material head plate 2, the top end of the first connecting pin 9 is fixed to the fixed plate 7, the top needle plate 1 is provided with a first connecting hole, the first connecting pin 9 is slidably arranged in the first connecting hole, the bottom end of the second connecting pin 10 is fixed to the bottom plate 11, the top needle plate 1 is provided with a let-out hole, the second connecting pin 10 is arranged in the let-out hole, the material head plate 2 is provided with a second connecting hole, and the second connecting pin 10 is slidably arranged in the second connecting hole. When the top needle plate 1 moves up and down, the first connecting pin 9 can prevent the top needle plate 1 from shaking left and right, and when the material head plate 2 moves up and down, the second connecting pin 10 can prevent the material head plate 2 from shaking left and right.

[0026] Optionally, the embodiment further comprises a first spring, the first spring is sleeved on the first connecting pin 9, and the two ends of the first spring abut against the bottom surface of the fixed plate 7 and the top surface of the top needle plate 1 respectively. The first spring can drive the top needle plate 1 to reset through the elastic force.

[0027] Optionally, the embodiment further comprises a second spring, the second spring is sleeved on the second connecting pin 10, and the two ends of the second spring abut against the bottom surface of the fixed plate 7 and the top surface of the material head plate 2 respectively. The second spring can drive the material head plate 2 to reset through the elastic force.

[0028] Optionally, the embodiment further comprises a connecting rod, the first end of the connecting rod is fixed to the top end of the material head rod 4, the first end of the material head 5 is swingably connected to the second end of the connecting rod through a rotating shaft, and the top surface of the mold core 8 is provided with a first notch for the connecting rod to extend into. In some optional embodiments, the first end of the connecting rod is detachably fixed to the top end of the material head rod 4 through a bolt.

[0029] Optionally, the first through hole and the second through hole are arranged through the mold core 8, the top needle 3 is slidably arranged in the first through hole, the top end of the top needle 3 can extend out of the first through hole, and the material head rod 4 is slidably arranged in the second through hole, the top end of the material head rod 4 can extend out of the second through hole.

[0030] Optionally, the material head connecting piece 6 comprises two mutually abutting connecting blocks, the connecting blocks are provided with arc-shaped notches on opposite surfaces, and the arc-shaped notches of the two connecting blocks can form a cavity. Since the cavity in the material head connecting piece 6 is irregular in shape and difficult to process, arranging the material head connecting piece 6 as two connecting blocks can reduce the production difficulty, and only the arc-shaped notches need to be arranged on the side surfaces of the connecting blocks, and then the two connecting blocks are abutted to form the cavity.

[0031] Optionally, the embodiment further comprises two side plates 13 and a pressing plate 14, the pressing plate 14 is fixed to the bottom surface of the ejector plate 1, the bottom surface of the pressing plate 14 is provided with a second gap capable of accommodating the material head plate 2, the top end of the side plate 13 is fixed to the bottom surface of the fixed plate 7, the bottom end of the side plate 13 is fixed to the top surface of the bottom plate 11, the ejector plate 1, the material head plate 2 and the pressing plate 14 are arranged between the two side plates 13, and the bottom end of the pressing plate 14 is provided with a buffer 15. When the ejector plate 1 is reset, the ejector plate 1 can drive the pressing plate 14 to move downward until the buffer 15 abuts against the bottom plate 11, and the buffer 15 can provide buffering for the pressing plate 14 to avoid excessive impact when contacting the bottom plate 11.

[0032] Optionally, the bottom plate 11 is provided with an opening corresponding to the material head plate 2 in the embodiment. Thus, the cylinder rod of the mechanism such as the cylinder used to drive the material head plate 2 to move upward can extend into the opening and push the material head plate 2 to move upward.

[0033] The material head pre-ejecting structure in the embodiment has the advantage of easy demolding.

Claims

1. A structure for advanced ejection of a sprue, characterized by, The utility model relates to a moulding plate, ejector plate (1), sprue plate (2), ejector pin (3), sprue rod (4), sprue (5) and sprue connecting piece (6), the ejector plate (1) vertical sliding connection is located in the lower of moulding plate in moulding plate, the sprue plate (2) vertical sliding connection is located in the lower of ejector plate (1) in moulding plate, the bottom end of ejector pin (3) is fixed in ejector plate (1), the top end of ejector pin (3) slides and is equipped with in moulding plate, the bottom end of sprue rod (4) is fixed in sprue plate (2), the top end of sprue rod (4) slides and is equipped with in moulding plate, sprue (5) is arc, the first end of sprue (5) swing connection is in the top end of sprue rod (4), the fixed mouth of being able to accommodate sprue connecting piece (6) is seted up on moulding plate, the cavity of being able to accommodate sprue (5) is seted up in sprue connecting piece (6), the first sprue mouth and the second sprue mouth of communicating both ends of cavity are seted up in the top end of sprue connecting piece (6), sprue (5) can pass through first sprue mouth and enter the cavity, the second end of sprue (5) can from the second sprue mouth and stretch out, the bottom end of workpiece (12) can contact the top end of ejector pin (3) and the second end of sprue (5), the sprue plate (2) can be driven to move upwards under the extrusion of ejector plate (1) after external force, the second end of sprue (5) can be driven to separate workpiece (12) under the sprue plate (2), ejector plate (1) and ejector pin (3) can be driven to move upwards under the extrusion of sprue plate (2), ejector pin (3) can be driven to separate workpiece (12) from moulding plate. The moulding plate includes a fixed plate (7) and a moulding plate (8), and the top surface of the fixed plate (7) is provided with a fixed hole, and the moulding plate (8) is fixed in the fixed hole.

2. The pre-ejection structure of claim 1, wherein: It also includes a first connecting pin (9), a second connecting pin (10) and a bottom plate (11), the bottom plate (11) is arranged below the sprue plate (2), the top end of the first connecting pin (9) is fixed to the fixed plate (7), a first connecting hole is formed in the ejector plate (1), and the first connecting pin (9) slides through the first connecting hole, the bottom end of the second connecting pin (10) is fixed to the bottom plate (11), a let-hole is formed in the ejector plate (1), the second connecting pin (10) passes through the let-hole, and a second connecting hole is formed in the sprue plate (2), and the second connecting pin (10) slides through the second connecting hole.

3. The pre-ejection structure of claim 2, wherein: It also includes a first spring, the first spring is sleeved on the first connecting pin (9), and the two ends of the first spring abut against the bottom surface of the fixed plate (7) and the top surface of the ejector plate (1) respectively.

4. The pre-ejection structure of claim 3, wherein: It also includes a second spring, the second spring is sleeved on the second connecting pin (10), and the two ends of the second spring abut against the bottom surface of the fixed plate (7) and the top surface of the sprue plate (2) respectively.

5. The pre-ejection structure of claim 4, wherein: It also includes a connecting rod, the first end of the connecting rod is fixed to the top end of the sprue rod (4), the first end of the sprue (5) is swing-connected to the second end of the connecting rod through a rotating shaft, and the top surface of the moulding plate (8) is provided with a first gap for the connecting rod to extend into.

6. The pre-ejection structure of claim 5, wherein: ​ 7. The pre-ejection structure of claim 1, wherein: The first through hole and the second through hole are arranged on the mold core (8) plate, the ejector pin (3) is slidably arranged in the first through hole, the top end of the ejector pin (3) can extend out of the first through hole, and the sprue rod (4) is slidably arranged in the second through hole, and the top end of the sprue rod (4) can extend out of the second through hole.

8. The pre-ejection structure of claim 1, wherein: The sprue connecting piece (6) comprises two mutually adhering connecting blocks, arc-shaped notches are arranged on opposite surfaces of the connecting blocks, and the arc-shaped notches of the two connecting blocks can form a cavity.

9. The pre-ejection structure of claim 2, wherein: Two side plates (13) and a pressing plate (14) are further included, the pressing plate (14) is fixed to the bottom surface of the ejector pin plate (1), a second notch capable of accommodating the sprue plate (2) is arranged on the bottom surface of the pressing plate (14), the top end of the side plate (13) is fixed to the bottom surface of the fixed plate (7), the bottom end of the side plate (13) is fixed to the top surface of the bottom plate (11), the ejector pin plate (1), the sprue plate (2) and the pressing plate (14) are arranged between the two side plates (13), and a buffer (15) is arranged at the bottom end of the pressing plate (14).

10. The pre-ejection structure of claim 9, wherein: The bottom plate (11) is provided with an opening corresponding to the sprue plate (2).

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