A pneumatic core-pulling mold with a mold core first separation structure

Abstract

The present invention proposes a pneumatic core-pulling mold with a mold core pre-separation structure, wherein a movable mold core is arranged in the movable mold plate, a core-pulling plate is installed under the movable mold plate, the core-pulling plate drives the movable mold plate to move, and mold-opening buckles are installed on the sides of the movable mold plate and the core-pulling plate. Under the action of the mold-opening buckle, the core-pulling plate is separated from the movable mold plate in advance, a mold foot is installed under the core-pulling plate, a mold core is set in the fixed mold plate, and two pneumatic core-pulling devices are arranged in the fixed mold core, which are respectively located on both sides of the product, and each pneumatic core-pulling device includes a core-pulling rod and a core-pulling cylinder, and the core-pulling cylinder drives the core-pulling rod to move. The technical problem that pneumatic core-pulling molds are mainly concentrated on direct core-pulling by cylinders, resulting in large lateral dimensions of the mold and high requirements on the model of the injection molding machine; for molds with larger mold cores, a strong ejection device is usually used, which will cause defects such as whitening of the ejection position or leaving ejection marks. The present invention adopts a mold core pre-separation structure through buckle machine control to reduce the clamping force of the product shrinkage on the mold core.

Description

Technical Field

[0001] The invention relates to a pneumatic core-pulling mould adopting a mould core first-separation structure, belonging to the technical field of mould design. Background Art

[0002] The pneumatic core-pulling molds of the prior art are mainly used in the field of injection molding. The products after injection molding will wrap around the mold due to thermal expansion and contraction. For molds with larger mold cores, the prior art usually uses a strong ejection device, which will cause defects such as white ejection positions or ejection marks. The existing molds mainly use cylinders to directly pull the core, resulting in large horizontal dimensions of the mold and high requirements for the injection molding machine model. Summary of the invention

[0003] In order to solve the technical problems that the pneumatic core-pulling molds in the prior art mainly focus on direct core pulling with the cylinder, resulting in a large lateral dimension of the mold and high requirements on the model of the injection molding machine; for molds with larger mold cores, a strong ejection device is usually used in the prior art, which will cause defects such as white ejection positions or ejection marks, the present invention proposes a pneumatic core-pulling mold with a mold core first separation structure.

[0004] The present invention provides a pneumatic core-pulling mold with a mold core first separation structure, comprising a fixed mold plate, a movable mold plate, a core-pulling plate, a mold foot, an ejector plate guide pin, an ejector panel, an ejector plate, a bottom plate, two pneumatic core-pulling devices, a movable mold core and a mold opening buckle machine;

[0005] The fixed template and the movable template are arranged opposite to each other, a movable mold core is arranged in the movable template, a core pulling plate is installed under the movable template, the core pulling plate drives the movable template to move, mold opening buckle machines are installed on the sides of the movable template and the core pulling plate, under the action of the mold opening buckle machine, the core pulling plate and the movable template are separated first, a mold foot is installed under the core pulling plate, a mold core is set in the fixed template, two pneumatic core pulling devices are arranged in the fixed mold core, respectively located on both sides of the product, each pneumatic core pulling device includes a core pulling rod and a core pulling cylinder, and the core pulling cylinder drives the core pulling rod to move.

[0006] Furthermore, the mold opening and locking machine includes a shift fork, a fixed plate, a locking tongue and a spring mounting position, the fixed plate is fixed to the side of the fixed mold plate, the shift fork is mounted on the side of the movable mold plate, the fixed plate and the shift fork are parallel to each other, the locking tongue is vertically mounted on the lower part of the fixed plate through the spring mounting position of the end head, the upper part of the shift fork is wider than the middle part, and the upper part of the shift fork can push the locking tongue when it moves downward.

[0007] Furthermore, a plurality of fixed-distance screws are installed below the movable mold core.

[0008] Furthermore, a flap block is installed below the movable mold core, a No. 1 T-block is provided on the upper part of the flap block, and the lower part and the No. 2 T-block are moved downward, the No. 2 T-block is installed on the T-block base, and the T-block base is connected to the core pulling plate.

[0009] Furthermore, a T-shaped structure is provided between the core pulling rod and the core pulling cylinder to drive the core pulling rod to continuously move laterally. The T-shaped structure includes a T-shaped slot and a T-shaped slide rail. The core pulling rod cooperates with the T-shaped slide rail through the T-shaped slot and moves along the T-shaped slide rail. The T-shaped slide rail is driven by the core pulling cylinder.

[0010] Furthermore, a limit block is provided on the T-shaped slide rail for recording the actual position of the cylinder, and a travel switch mold closing position and a travel switch opening position are respectively provided at both ends of the limit block. By adjusting the two travel switch positions, the core pulling distance and the mold closing state of the core pulling rod are controlled.

[0011] Furthermore, the movable mold core is connected to the movable mold plate by means of a wedge block pressing method, a reference right angle is machined in the movable mold plate, and the movable mold core is laterally pressed by the wedge block.

[0012] Furthermore, a mold temperature tube is provided on the flap block so that the core temperature can be precisely controlled.

[0013] Furthermore, a bottom plate is installed below the mold foot, an ejector plate is arranged on the bottom plate, a plurality of ejector plate guide pillars are arranged between the bottom plate and the core pulling plate, and the ejector plate moves up and down along the plurality of ejector plate guide pillars.

[0014] Furthermore, an ejector panel is provided on the ejector plate, and an ejector countersunk hole is provided on the ejector panel for placing the ejector.

[0015] Furthermore, a plurality of garbage screws are provided on the ejector panel for cleaning dust between the molds.

[0016] The pneumatic core-pulling mold with a mold core first separation structure of the present invention has the following beneficial effects:

[0017] 1. The existing technology mainly focuses on direct core pulling by the cylinder, which results in large lateral dimensions of the mold and high requirements for the injection molding machine model. However, this mold can flexibly adjust the angle and length of the trapezoidal groove seat within a certain range, so it can quickly adapt to meet the core pulling requirements and reduce the lateral dimensions of the mold.

[0018] 2. For molds with larger mold cores, a strong ejector device is usually used in the prior art, which will cause defects such as whitening of the ejection position or leaving ejection marks. However, the product of this mold is a thin-walled part, and the clamping force on the mold core is relatively large, so it cannot be directly ejected using a push plate or ejector pin. This mold is controlled by a buckle machine and adopts a mold core first separation structure to reduce the clamping force of the product shrinkage on the mold core.

[0019] 3. The present invention converts the linear motion of the cylinder into motion in a direction perpendicular to the motion direction of the cylinder through a mechanism conversion, thereby reducing the overall lateral size of the mold and making the mold structure more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] In the attached picture:

[0022] Figure 1 This is a general diagram of the pneumatic core-pulling mold mechanism with a mold core first separation structure according to the present invention;

[0023] Figure 2 This is the core pulling structure diagram on the cylinder side;

[0024] Figure 3 This is the cross-sectional view of the core pulling on the cylinder side;

[0025] Figure 4 This is the side view of the core pulling on the cylinder side;

[0026] Figure 5 It is the cylinder stroke limit diagram;

[0027] Figure 6 This is the structural diagram of cylinder core pulling and mold core separation;

[0028] Figure 7 This is the mold core separation structure diagram;

[0029] Figure 8 This is the fixed-pitch screw structure diagram;

[0030] Fig. 9 This is a top view of the machine installation position;

[0031] Fig.10 This is the isometric view of the button machine and the mold core;

[0032] Fig.11 This is the appearance of the button machine;

[0033] Fig.12 This is the internal structure diagram of the button machine;

[0034] Among them, 1-insulation board; 2-panel; 2-1-inspection port; 2-2-fixed installation position; 3-fixed template; 4-movable template; 5-core pulling plate; 6-mold foot; 6-1-mold temperature system; 7-ejector plate guide column; 8-ejector panel; 8-1-trash screw; 9-ejector plate; 10-bottom plate; 11-product; 12-core pulling rod; 12-1-T-slot; 13-core pulling cylinder; 14-T-slide rail; 1 5-limit block; 16-1-travel switch mold closing position; 16-2-travel switch open position; 17-movable mold core; 18-petal closing block; 18-1-mold temperature tube; 18-2-No. 1 T-block; 19-T-block base; 19-1-No. 2 T-block; 20-mold opening machine; 20-1-shift fork; 20-2-fixed plate; 20-3-lock tongue; 20-4-spring installation position; 21-fixed distance screw. DETAILED DESCRIPTION

[0035] The specific implementation of the present invention is further described in detail below with reference to the accompanying drawings:

[0036] Specific implementation method 1: See Figure 1-11 The pneumatic core-pulling mold with a mold core first-separation structure described in this embodiment includes a fixed mold plate 3, a movable mold plate 4, a core-pulling plate 5, a mold foot 6, an ejector plate guide pin 7, an ejector panel 8, an ejector plate 9, a bottom plate 10, a product 11, two pneumatic core-pulling devices, a movable mold core 17, and a mold opening and buckling machine 20;

[0037] The fixed mold plate 3 and the movable mold plate 4 are arranged in relative coordination, and a movable mold core 17 is arranged in the movable mold plate 4, and a core pulling plate 5 is installed below the movable mold plate 4, and the core pulling plate 5 drives the movable mold plate 4 to move. A mold opening buckle machine 20 is installed on the sides of the movable mold plate 4 and the core pulling plate 5. Under the action of the mold opening buckle machine 20, the core pulling plate 5 is separated from the movable mold plate 4 first, and a mold foot 6 is installed below the core pulling plate 5. A mold core is set in the fixed mold plate 3, and two pneumatic core pulling devices are arranged in the fixed mold core, which are respectively located on both sides of the product 11, and each pneumatic core pulling device includes a core pulling rod 12 and a core pulling cylinder 13, and the core pulling cylinder 13 drives the core pulling rod 12 to move.

[0038] The locking machine 20 includes a shift fork 20-1, a fixed plate 20-2, a locking tongue 20-3 and a spring mounting position 20-4. The fixed plate 20-2 is fixed to the side of the fixed template 3, and the shift fork 20-1 is installed on the side of the movable template 4. The fixed plate 20-2 and the shift fork 20-1 are parallel to each other. The locking tongue 20-3 is vertically installed at the lower part of the fixed plate 20-2 through the spring mounting position 20-4 at the end. The upper part of the shift fork 20-1 is wider than the middle part, and the downward movement of the upper part of the shift fork 20-1 can push the locking tongue 20-3.

[0039] A plurality of fixed-distance screws 21 are installed below the movable mold core 17 .

[0040] A flap block 18 is installed below the movable mold core 17. The upper part of the flap block 18 is provided with a No. 1 T-block 18-2, and the lower part is moved downward with the No. 2 T-block 19-1. The No. 2 T-block 19-1 is installed on the T-block base 19, and the T-block base 19 is connected to the core pulling plate 5.

[0041] A T-shaped structure is provided between the core pulling rod 12 and the core pulling cylinder 13 to drive the lateral continuous movement of the core pulling rod 12. The T-shaped structure includes a T-shaped slot 12-1 and a T-shaped slide rail 14. The core pulling rod 12 cooperates with the T-shaped slide rail 14 through the T-shaped slot 12-1 and moves along the T-shaped slide rail 14. The T-shaped slide rail 14 is driven by the core pulling cylinder 13.

[0042] A limit block 15 is provided on the T-shaped slide rail 14 for recording the actual position of the cylinder. A travel switch mold closing position 16-1 and a travel switch opening position 16-2 are respectively provided at both ends of the limit block 15. By adjusting the two travel switch positions, the core pulling distance and the mold closing state of the core pulling rod 12 are controlled.

[0043] The movable mold core 17 is connected to the movable mold plate 4 by means of a wedge block pressing method. A reference right angle is processed in the movable mold plate 4, and the movable mold core 17 is pressed laterally by the wedge block.

[0044] A mold temperature tube 18 - 1 is provided on the flap block 18 so that the core temperature can be precisely controlled.

[0045] A bottom plate 10 is installed below the mold foot 6, and an ejector plate 9 is arranged on the bottom plate 10. A plurality of ejector plate guide pillars 7 are arranged between the bottom plate 10 and the core pulling plate 5. The ejector plate 9 moves up and down along the plurality of ejector plate guide pillars 7 to ensure that the ejector plate 9 runs smoothly during the ejection process. One end of the ejector plate 9 is connected to the ejector rod of the injection molding machine to realize the ejection of the product. The bottom plate 10 is connected to the injection molding machine through a pressure plate.

[0046] The ejector plate 9 is provided with an ejector panel 8, and the ejector panel 8 is provided with an ejector countersunk hole for placing the ejector. The ejector panel 8 is provided with a plurality of garbage screws 8-1 for cleaning dust between molds.

[0047] The heat insulation board 1 reduces the heat exchange between the mold itself and the injection molding machine, prevents the slight displacement of the hot nozzle and the sprue sleeve caused by heat, and avoids overflow.

[0048] The panel 2 is provided with a fixed installation position 2-2, and the mold can be placed on the injection molding machine in various directions through the pressing plate.

[0049] An inspection port 2-1 is provided on the panel, so that the mold core insert can be quickly replaced without disassembling the mold.

[0050] A mold core is set in the fixed mold plate 3, and a pneumatic core-pulling insert is arranged on the fixed mold core.

[0051] The movable mold core is arranged inside the movable mold plate 4, and a mold opening and locking machine 20 is arranged on the movable mold plate.

[0052] The core-pulling plate 5 is provided with a mold-opening buckle machine 20 , under the action of the mold-opening buckle machine 20 , the core-pulling plate 5 is separated from the movable mold plate 4 in advance.

[0053] The height of the mold foot 6 is determined according to the ejection stroke and the length of the fixed-pitch screw, and a mold temperature system (usually a cooling system) is provided on the mold foot.

[0054] The product 11 has a small undercut feature. The design of slider core pulling will increase the overall cost of the mold and the mold maintenance cost. Therefore, the cylinder 13 and the T-shaped structure are selected to cooperate with the core pulling, so that the overall structure of the mold is more compact, the core pulling action is accurate, and the mold can be opened automatically before the mold is opened. After the core pulling action is completed (the detection signal is in place), the mold opening number is sent to the injection molding machine through delay control or directly. The mold opening action does not depend on the mold opening itself.

[0055] One end of the core-pulling rod 12 is connected to the product 11 to form a hollow feature on the product 11 , and one end is provided with a T-shaped structure to drive the core-pulling rod 12 to move continuously in the lateral direction.

[0056] The core-pulling cylinder 13, as a pneumatic standard part, has two working states: forward working state and backward working state.

[0057] The T-slot 12 - 1 is used in conjunction with the T-slide rail 14 , and driven by the cylinder, ultimately achieving linear core pulling of the core pulling rod 12 .

[0058] A limit block 15 is provided on the T-shaped slide rail 14 to record the actual position of the cylinder.

[0059] The flap block 18 has a larger inner surface area of ​​the product, so the clamping force on the core is greater. If it is directly ejected, the product will be whitened or even broken. The flap block 18 is set, and under the action of the mold opening and locking machine 20, the flap block 18 is pulled downward before the mold is opened, so that the vacuum state between the product and the core is removed, making preliminary preparations for the ejection of the product.

[0060] The T-block base 19 is connected to the core-pulling plate 5. When the injection molding machine moves backward, under the action of the mold opening and buckling machine 20, the core-pulling plate 5 drives the T-block base 19 to separate from the movable mold plate 4 first, thereby realizing the downward separation of the flap block 18. The second T-block 19-1 can convert linear motion into oblique motion. The function of the first T-block 18-2 is similar to that of the second T-block 19-1.

[0061] The fixed-distance screw 21, under the action of the mold opening buckle machine 20, separates the core-pulling plate 5 from the movable mold plate 4 first. When the flap block 18 is pulled out to the point where the product can be ejected, the movable mold plate 4 is driven by the fixed-distance screw 21 to separate the fixed mold plate 4 from the fixed mold plate 3, and the product is separated from the parting surface, completing the mold opening.

[0062] The shift fork 20-1 is installed on the core pulling plate 5. During the mold opening process, as the shift fork 20-1 moves, the shift fork 20-1 touches the lock tongue 20-3, the lock tongue 20-3 is reset, and the fixed plate 20-2 is released until the fixed distance screw 21 drives the moving template to realize the sequential mold opening action of the buckle machine.

[0063] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. It can also be a reasonable combination of the features recorded in the above embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic core-pulling mold with a mold core first separation structure, characterized in that: It comprises a fixed mold plate (3), a movable mold plate (4), a core pulling plate (5), a mold foot (6), an ejector plate guide pin (7), an ejector panel (8), an ejector plate (9), a bottom plate (10), two pneumatic core pulling devices, a movable mold core (17) and a mold opening and locking machine (20); The fixed mold plate (3) and the movable mold plate (4) are arranged opposite to each other, a movable mold core (17) is arranged in the movable mold plate (4), a core pulling plate (5) is installed below the movable mold plate (4), the core pulling plate (5) drives the movable mold plate (4) to move, a mold opening buckle machine (20) is installed on the side of the movable mold plate (4) and the core pulling plate (5), under the action of the mold opening buckle machine (20), the core pulling plate (5) and the movable mold plate (4) are separated first, and a mold foot (6) is installed below the core pulling plate (5). A mold core is set in the fixed mold core (3), and two pneumatic core pulling devices are arranged in the fixed mold core, respectively located on both sides of the product (11), each pneumatic core pulling device comprises a core pulling rod (12) and a core pulling cylinder (13), and the core pulling cylinder (13) drives the core pulling rod (12) to move.

2. The pneumatic core-pulling mold with a mold core first separation structure according to claim 1 is characterized in that: The mold opening and locking machine (20) comprises a shift fork (20-1), a fixed plate (20-2), a locking tongue (20-3) and a spring mounting position (20-4); the fixed plate (20-2) is fixed on the side of the fixed mold plate (3); the shift fork (20-1) is mounted on the side of the movable mold plate (4); the fixed plate (20-2) and the shift fork (20-1) are parallel to each other; the locking tongue (20-3) is vertically mounted on the lower part of the fixed plate (20-2) through the spring mounting position (20-4) at the end; the upper part of the shift fork (20-1) is wider than the middle part; and the upper part of the shift fork (20-1) can push the locking tongue (20-3) when it moves downward.

3. The pneumatic core-pulling mold with a mold core first separation structure according to claim 1 is characterized in that: A plurality of fixed-distance screws (21) are installed below the movable mold core (17).

4. The pneumatic core-pulling mold with a mold core first separation structure according to claim 1 is characterized in that: A flap block (18) is installed below the movable mold core (17); a No. 1 T-block (18-2) is arranged on the upper part of the flap block (18); and a No. 2 T-block (19-1) moves downward with the lower part; the No. 2 T-block (19-1) is installed on a T-block base (19); and the T-block base (19) is connected to the core pulling plate (5).

5. The pneumatic core-pulling mold with a mold core first separation structure according to claim 1 is characterized in that: A T-shaped structure is provided between the core pulling rod (12) and the core pulling cylinder (13) to drive the core pulling rod (12) to continuously move laterally. The T-shaped structure comprises a T-shaped slot (12-1) and a T-shaped slide rail (14). The core pulling rod (12) cooperates with the T-shaped slide rail (14) through the T-shaped slot (12-1) and moves along the T-shaped slide rail (14). The T-shaped slide rail (14) is driven by the core pulling cylinder (13).

6. The pneumatic core-pulling mold with a mold core first separation structure according to claim 5, characterized in that: A limit block (15) is arranged on the T-shaped slide rail (14) for recording the actual position of the cylinder. A travel switch mold closing position (16-1) and a travel switch opening position (16-2) are respectively arranged at two ends of the limit block (15). By adjusting the positions of the two travel switches, the core pulling distance and the mold closing state of the core pulling rod (12) are controlled.

7. The pneumatic core-pulling mold with a mold core first separation structure according to claim 1, characterized in that: The movable die core (17) is connected to the movable die plate (4) by means of a wedge block pressing method. A reference right angle is machined inside the movable die plate (4) to laterally press the movable die core (17) by means of a wedge block.

8. The pneumatic core-pulling mold with a mold core first separation structure according to claim 1 is characterized in that: A mold temperature tube (18-1) is arranged on the flap block (18) so that the temperature of the mold core can be accurately controlled.

9. The pneumatic core-pulling mold with a mold core first separation structure according to claim 1, characterized in that: A bottom plate (10) is installed below the mold foot (6), an ejector plate (9) is arranged on the bottom plate (10), a plurality of ejector plate guide pillars (7) are arranged between the bottom plate (10) and the core pulling plate (5), and the ejector plate (9) moves up and down along the plurality of ejector plate guide pillars (7).

10. The pneumatic core-pulling mold with a mold core first separation structure according to claim 9, characterized in that: The ejector plate (9) is provided with an ejector panel (8), the ejector panel (8) is provided with an ejector countersunk hole for placing the ejector, and the ejector panel (8) is provided with a plurality of garbage screws (8-1) for cleaning dust between molds.

Images