A fixed mold ejection device

Abstract

The utility model discloses a fixed mode ejection device relates to die ejection technical field, including, movable die, with fixed mode of movable die cooperation and with the base of fixed ground, the top surface fixed connection of base has the guide rod, the top of guide rod with the bottom surface fixed connection of fixed mode, be provided with the moving plate of the slidable along guide rod between fixed mode and base, the both sides of moving plate are connected with the both sides of movable die through the connecting structure of setting, the utility model discloses the height of adjusting connecting seat has changed the precompression of spring directly. The spring precompression increases with the increase of connecting seat height, and the initial elastic force and the final ejection force increase accordingly, and vice versa, the ejection force decreases, for the product of large projection area, strong adhesion, adjustable height ejection force ensures reliable stripping, for light, thin and fragile product, adjustable low ejection force avoids the top white or damage. Greatly improve the versatility and production efficiency of mould.

Description

Technical Field

[0001] This utility model relates to the field of mold ejection technology, and in particular to a fixed mold ejection device. Background Technology

[0002] In the field of injection molding, molds typically consist of two parts: a moving mold and a fixed mold. After mold opening, the molded product often remains on the fixed mold side, where the cavity is deeper or the shape is more complex. For products remaining in the fixed mold, a specialized ejection mechanism is required to demold them.

[0003] In existing technologies, a common solution for fixed mold ejection is to install an ejection system driven by hydraulics or cylinders inside the fixed mold. While this solution offers controllable ejection force, it is complex in structure, expensive, and inconvenient to maintain. Another lower-cost solution utilizes the opening motion of the moving mold to drive the ejector rod on the fixed mold side via mechanical linkage. However, this type of mechanical ejection device provides a fixed ejection force that is difficult to adjust during ejection.

[0004] Specifically, these devices often rely on springs to provide ejection force, but the pre-compression of the spring (i.e., initial elastic force) is fixed after installation. This results in insufficient ejection force: when producing products with a large projected area or strong adhesion to the mold cavity, the fixed spring force may not be able to reliably eject the product, causing demolding failure. Excessive ejection force: for thin and fragile products, the fixed spring force may be too large, causing product deformation or damage. Utility Model Content

[0005] The purpose of this utility model is to provide a fixed mold ejection device to solve the problems mentioned in the background art, such as the difficulty in adjusting the fixed ejection force of existing ejection devices, which can easily cause demolding failure, deformation and damage to the product.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fixed mold ejection device, comprising a moving mold, a fixed mold cooperating with the moving mold, and a base fixed to the ground.

[0007] A guide rod is fixedly connected to the top surface of the base, and the top end of the guide rod is fixedly connected to the bottom surface of the fixed mold.

[0008] A movable plate that can slide along the guide rod is provided between the fixed mold and the base;

[0009] The movable plate is connected to both sides of the moving mold through a connecting structure provided on both sides of the movable plate;

[0010] The connection structure includes a pulling device, which can drive the moving plate to move upward along the guide rod when the moving mold rises.

[0011] The top of the movable plate is fixedly connected to a height-adjustable connecting seat;

[0012] A telescopic rod is fixedly connected to the top of the connecting seat, a spring is sleeved on the outside of the telescopic rod, and a push plate is fixedly connected to the top of the telescopic rod, the push plate being located below the fixed mold;

[0013] The spring is in a pre-compressed state, with its two ends abutting against the connecting seat and the push plate, respectively. By adjusting the height of the connecting seat, the pre-compression of the spring can be changed, thereby adjusting the ejection force provided by the spring when ejecting the product.

[0014] The top surface of the push plate is provided with a push rod for ejecting the molded product, and the top end of the push rod penetrates the fixed mold and extends to the outside.

[0015] Preferably, the pulling device includes pull rods fixed to both sides of the moving mold, and a pull plate is fixedly connected to the bottom end of the pull rods; a connecting box is fixedly connected to both sides of the fixed mold, and two vertically adjustable stop rods are provided in the connecting box. The two stop rods are located on both sides of the pull rods, and the top surface of the pull plate can contact the bottom end of the stop rod.

[0016] Preferably, the connecting box has multiple equally spaced slots on both sides, and the size of the slots is adapted to the stop bar; the stop bar is detachably inserted into the slot by a locking device.

[0017] Preferably, the locking device includes a blocking plate that is fixedly connected to one end of both of the stop bars, and a screw that passes through the connecting box and is threadedly connected to the stop bars; the blocking plate and the head of the screw are clamped on both sides of the connecting box, and the locking is achieved by tightening the screw.

[0018] Preferably, the height-adjustable connecting seat is composed of multiple stacked pads. The overall height can be changed by increasing or decreasing the number of pads or replacing pads of different thicknesses, and the stacked pads are fixed to the top surface of the movable plate using fixing bolts.

[0019] Preferably, the top surface of the push plate has multiple insertion holes, and the multiple insertion rods are selectively inserted into different insertion holes according to the shape of the mold product.

[0020] The technical effects and advantages of this utility model are as follows: By adjusting the height of the connecting seat, the pre-compression of the spring is directly changed. Raising the connecting seat increases the spring pre-compression, thus increasing both the initial elastic force and the final ejection force; conversely, lowering the connecting seat decreases the ejection force. For products with large projected areas and strong adhesion, the ejection force can be increased to ensure reliable demolding; for thin and fragile products, the ejection force can be decreased to prevent whitening or damage. This greatly improves the versatility and production efficiency of the mold. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a partial three-dimensional structural diagram of the present invention.

[0023] Figure 3 This is a schematic diagram of the connecting box structure of this utility model.

[0024] Figure 4 This is a schematic diagram of the tie rod structure of this utility model.

[0025] Figure 5 This is a schematic diagram of the push plate part of this utility model.

[0026] In the diagram: 1. Moving mold; 2. Fixed mold; 3. Base; 4. Guide rod; 5. Moving plate; 6. Connecting box; 61. Slot; 7. Blocking plate; 71. Stop bar; 72. Screw; 8. Pull rod; 81. Pull plate; 9. Connecting seat; 91. Spring; 92. Insert rod; 93. Push plate. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] This utility model provides, for example Figure 1-5 The illustrated fixed mold ejection device includes a movable mold 1, a fixed mold 2 that cooperates with the movable mold 1, and a base 3 fixed to the ground.

[0029] A guide rod 4 is fixedly connected to the top surface of the base 3, and the top end of the guide rod 4 is fixedly connected to the bottom surface of the fixed mold 2.

[0030] A movable plate 5 that can slide along the guide rod 4 is provided between the fixed mold 2 and the base 3;

[0031] The movable plate 5 is connected to both sides of the moving mold 1 through the connecting structures provided on both sides of the movable plate 5;

[0032] The connecting structure includes a pulling device. When the moving mold 1 rises, the pulling device can drive the moving plate 5 to move upward along the guide rod 4.

[0033] The top of the movable plate 5 is fixedly connected to a height-adjustable connecting seat 9;

[0034] A telescopic rod is fixedly connected to the top of the connecting seat 9. A spring 91 is sleeved on the outside of the telescopic rod, and a push plate 93 is fixedly connected to the top of the telescopic rod. The push plate 93 is located below the fixed mold 2.

[0035] Spring 91 is in a pre-compressed state, with its two ends abutting against connecting seat 9 and push plate 93 respectively; by adjusting the height of connecting seat 9, the pre-compression amount of spring 91 is changed, thereby adjusting the ejection force provided by spring 91 when ejecting the product.

[0036] The top surface of the push plate 93 is provided with a push rod 92 for ejecting the molded product. The top end of the push rod 92 passes through the fixed mold 2 and extends to the outside.

[0037] During injection molding, the moving mold 1 and the fixed mold 2 close together. Upon opening, the moving mold 1 rises under the drive of the injection molding machine. The moving mold 1 pulls the movable plate 5 via its two side-mounted pulling devices, causing the movable plate 5 to slide upwards along the guide rod 4 fixed between the base 3 and the fixed mold 2. The movable plate 5 then raises its top connecting seat 9. The connecting seat 9, through its telescopic rod and a pre-compressed spring 91, pushes the push plate 93, causing the insert rod 92 on the push plate 93 to extend into the cavity of the fixed mold 2, ejecting the product. The height of the connecting seat 9 is adjustable; increasing its height applies a greater pre-compression to the spring 91, allowing the spring 91 to store and release greater elastic potential energy at the moment of ejection, thus providing a greater ejection force. Conversely, decreasing the height of the connecting seat 9 reduces both the pre-compression and the ejection force.

[0038] By adjusting the height of the connecting seat 9, the pre-compression and initial elastic force of the spring 91 can be controlled steplessly and precisely, thereby achieving flexible and convenient adjustment of the ejection force. The mold opening power of the moving mold 1 is used as the ejection driving force, eliminating the need for complex external power sources such as hydraulic or pneumatic systems, simplifying the mold structure and significantly reducing manufacturing and maintenance costs.

[0039] like Figure 3 and Figure 4 As shown, the pulling device includes pull rods 8 fixed to both sides of the moving mold 1, and a pull plate 81 fixedly connected to the bottom end of the pull rods 8; a connecting box 6 is fixedly connected to both sides of the fixed mold 2, and two vertically adjustable stop rods 71 ​​are provided in the connecting box 6. The two stop rods 71 ​​are located on both sides of the pull rods 8, and the top surface of the pull plate 81 can contact the bottom end of the stop rod 71.

[0040] Tie rods 8 are installed on both sides of the moving mold 1, and pull plates 81 are fixed to the bottom of the tie rods 8. Boxes 6 are fixedly connected to both sides of the fixed mold 2, and two height-adjustable stop bars 71 are installed inside the boxes. When the mold opens, the moving mold 1 drives the tie rods 8 and pull plates 81 to rise. When the pull plate 81 contacts and abuts the bottom of the higher stop bar 71, the stop bar 71 prevents the pull plate 81 from rising further, thus converting the upward movement of the moving mold 1 into an upward pulling force on the moving plate 5.

[0041] like Figure 3As shown, multiple equally spaced slots 61 are provided on both sides of the connecting box 6, and the size of the slots 61 is adapted to the stop bar 71; the stop bar 71 is detachably inserted into the slots 61 by means of a locking device;

[0042] Multiple sets of slots 61 arranged vertically are made on both sides of the connecting box 6. When it is necessary to adjust the height of the stop lever 71, the stop lever 71 is pulled out from the current slot 61 and then inserted into another pair of slots 61 at a higher or lower position. Finally, it is fixed by the locking device. The height of the stop lever 71 can be adjusted by simple plugging and unplugging operations, thereby changing the timing of the pulling action.

[0043] like Figure 3 As shown, the locking device includes a blocking plate 7 that is fixedly connected to one end of the two stops 71, and a screw 72 that passes through the connecting box 6 and is threadedly connected to the stops 71; the heads of the blocking plate 7 and the screw 72 are clamped on both sides of the connecting box 6, and the device is fixed by tightening the screw 72.

[0044] One end of each of the two stop bars 71 is connected to a stop plate 7, and the other end passes through a selected slot 61. On the outside of the connecting box 6, screws 72 are threaded onto the ends of the stop bars 71. Tightening the screws 72 securely clamps the stop bars 71 and the stop plate 7 against the side walls of the connecting box 6, achieving a firm lock.

[0045] like Figure 5 As shown, the height-adjustable connecting seat 9 is composed of multiple stacked pads. The overall height can be changed by increasing or decreasing the number of pads or replacing pads of different thicknesses. The stacked pads are fixed to the top surface of the movable plate 5 using fixing bolts.

[0046] The height-adjustable connector 9 is composed of several metal plates of standard or non-standard thickness stacked together. The overall height of the connector 9 can be changed by increasing or decreasing the number of plates, or by replacing them with plates of different thicknesses. After stacking to the desired height, fixing bolts are passed through all the plates and screwed into the threaded holes on the top surface of the movable plate 5 to secure all the plates together.

[0047] like Figure 5 As shown, the top surface of the push plate 93 has multiple insertion holes, and multiple insertion rods 92 are selectively inserted into different insertion holes according to the shape of the mold product;

[0048] On the top surface of the push plate 93, multiple threaded holes or smooth insertion holes are formed in a matrix or specific pattern according to the ejection point position rules of common products. In practical applications, based on the specific product shape and demolding force requirements of this production, insertion rods 92 of appropriate length and diameter are selected and installed in the corresponding insertion holes, while unused insertion holes are left empty, increasing the flexibility of the device.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fixed mold ejection device, comprising a movable mold (1), a fixed mold (2) cooperating with the movable mold (1), and a base (3) fixed to the ground, characterized in that: The top surface of the base (3) is fixedly connected to a guide rod (4), and the top end of the guide rod (4) is fixedly connected to the bottom surface of the fixed mold (2). A movable plate (5) that can slide along the guide rod (4) is provided between the fixed mold (2) and the base (3); The movable plate (5) is connected to both sides of the moving mold (1) through the connecting structure provided on both sides of the movable plate (5); The connection structure includes a pulling device. When the moving mold (1) rises, the pulling device can drive the moving plate (5) to move upward along the guide rod (4). The top of the movable plate (5) is fixedly connected to a height-adjustable connecting seat (9); The top end of the connecting seat (9) is fixedly connected to a telescopic rod, and a spring (91) is sleeved on the outside of the telescopic rod. The top end of the telescopic rod is fixedly connected to a push plate (93), and the push plate (93) is located below the fixed mold (2). The spring (91) is in a pre-compressed state, with its two ends abutting against the connecting seat (9) and the push plate (93) respectively; by adjusting the height of the connecting seat (9), the pre-compression amount of the spring (91) can be changed, thereby adjusting the ejection force provided by the spring (91) when ejecting the product; The top surface of the push plate (93) is provided with a push rod (92) for ejecting the molded product. The top end of the push rod (92) passes through the fixed mold (2) and extends to the outside.

2. The fixed mold ejection device according to claim 1, characterized in that: The pulling device includes pull rods (8) fixed on both sides of the moving mold (1), and a pull plate (81) is fixedly connected to the bottom end of the pull rods (8); a connecting box (6) is fixedly connected to both sides of the fixed mold (2), and two vertically adjustable stop rods (71) are provided in the connecting box (6). The two stop rods (71) are located on both sides of the pull rods (8), and the top surface of the pull plate (81) can contact the bottom end of the stop rod (71).

3. The fixed mold ejection device according to claim 2, characterized in that: The connecting box (6) has multiple equally spaced slots (61) on both sides, and the size of the slots (61) is adapted to the stop bar (71); the stop bar (71) is detachably inserted into the slot (61) by means of a locking device.

4. The fixed mold ejection device according to claim 3, characterized in that: The locking device includes a blocking plate (7) that is fixedly connected to one end of the two stops (71), and a screw (72) that passes through the connecting box (6) and is threaded to the stops (71); the heads of the blocking plate (7) and the screw (72) are clamped on both sides of the connecting box (6) and fixed by tightening the screw (72).

5. The fixed mold ejection device according to claim 1, characterized in that: The height-adjustable connecting seat (9) is made of multiple stacked pads. Its overall height can be changed by increasing or decreasing the number of pads or replacing pads of different thicknesses. The stacked pads are fixed to the top surface of the movable plate (5) using fixing bolts.

6. The fixed mold ejection device according to claim 1, characterized in that: The top surface of the push plate (93) is provided with multiple insertion holes, and the multiple insertion rods (92) are selectively inserted into different insertion holes according to the shape of the mold product.

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