Automatic insert fixing structure after insert feeding of die casting

Abstract

The utility model discloses a kind of insert fixing structure after automatic feeding of die casting insert, comprising: longitudinal oil pressure draw, the front end of longitudinal oil pressure draw core is equipped with stopper by connector, the front end of longitudinal oil pressure draw core is equipped with draw core end protrusion, the rear end of stopper is equipped with stopper end protrusion, the edge of connector is equipped with the clamping protrusion matched with draw core end protrusion, stopper end protrusion, the thickness size of stopper front section is first thickness, the thickness size of stopper rear section is second thickness, first thickness is less than second thickness, movable mould frame is opened in movable mould frame channel, movable mould core is opened in mould core channel, movable mould insert is opened in insert channel, insert nest is opened in insert nest channel, movable mould frame channel, mould core channel, insert channel, insert nest channel are sequentially communicated to form sliding slot, the size of movable mould frame channel is matched with second thickness, the size of mould core channel, insert channel, insert nest channel is matched with first thickness, stopper is slidably arranged in sliding slot.

Description

Technical Field

[0001] This utility model relates to the field of die casting technology, and in particular to an insert fixing structure after automatic feeding of die casting inserts. Background Technology

[0002] Conventional die-cast aluminum alloy castings typically involve injecting molten aluminum into a die-casting mold and allowing it to cool and solidify. However, some die-cast parts require enhanced and improved technical specifications due to functional demands. Since aluminum alloy materials often cannot meet these performance requirements, many castings utilize inserts made of embedded steel. Before die-casting, various materials, including steel, are placed in the mold. After die-casting, these materials integrate with the aluminum alloy casting, ensuring that the casting's specific performance meets the design requirements.

[0003] In the production of die-cast parts with inserts, after mold opening, the insert is typically placed manually or mechanically at the moving and fixed mold parting point. The entry depth is limited and fixed by a venting pin, which significantly impacts the production cycle. The insert insertion process requires several actions: opening the safety door, inserting the insert, closing the safety door, and pressing the start button, which takes a considerable amount of time. Typically, in a 60-second cycle, insert insertion takes nearly 8 seconds, accounting for about 10% of the total production cycle.

[0004] To improve production efficiency, die-casting manufacturers have developed back-end insert insertion equipment. This equipment simultaneously inserts the insert at the rear end of the moving mold while the part is being removed and coated, significantly shortening the production cycle time. However, some casting quality issues have arisen during production. The back-end insert insertion process involves automatically transporting the insert to a designated position at the rear end of the moving mold. A hydraulic core puller, positioned at the rear end of the moving mold, then guides the core to push the insert into the designated position on the mold core. Furthermore, the hydraulic core puller utilizes its hydraulic pressure holding function to restrict the insert's retraction (casting pressure causes the insert to transmit pressure to the hydraulic core puller), thus ensuring the insert's position and dimensions within the casting.

[0005] However, in daily die-casting production, deviations in the position and dimensions of inserts frequently occur. See details below. Figure 1 The diagram illustrates a die-casting device with a symmetrical structure on both sides, allowing for the insertion of two inserts. The left half shows insert 1 automatically entering the loading position within the insert mounting hole. The right half shows the hydraulic core puller 2 pushing the guide core 3 to insert the insert into the insert sleeve 4. For the insert insertion case shown on the right, after mold closing, the high-pressure injection of molten aluminum begins. Since the die-casting specific pressure is typically around 800 kg / cm³... 2Left and right, the pressure is transmitted to the casting insert through the molten aluminum. The pressure acts directly on the hydraulic core puller and is transmitted to the guide core. Although the hydraulic core puller's oil circuit system is in a closed pressure state, under the action of casting pressure (arrow direction), the insert 1 will have a slight displacement in the pressure direction, that is, the position and size of the insert will deviate, which can easily lead to the overall scrapping of the casting. Utility Model Content

[0006] This invention addresses the aforementioned problem of frequent deviations in the position and dimensions of inserts. Observation and research revealed that the issue lies in the limiting and fixing of the inserts. This is because the hydraulic core puller provides soft positioning, often resulting in the core being guided backward by the hydraulic core puller. The purpose of this invention is to provide an insert fixing structure after automatic feeding of die-cast inserts, achieving rigid fixing of the inserts and overcoming the dimensional instability defects of existing insert technologies.

[0007] To achieve the above objectives, the present invention adopts the following solution:

[0008] This utility model provides an insert fixing structure after automatic feeding of die-casting inserts, characterized in that: it includes a longitudinal hydraulic core puller, which is horizontally arranged. A stopper is installed at the front end of the longitudinal hydraulic core puller through a connector. The front end of the longitudinal hydraulic core puller has a core puller end protrusion, and the rear end of the stopper has a stopper end protrusion. One side edge of the connector has a first snap-fit ​​protrusion that cooperates with the core puller end protrusion, and the other side edge of the connector has a second snap-fit ​​protrusion that cooperates with the end protrusion. The front section thickness of the stopper is a first thickness, and the rear section thickness of the stopper is a second thickness. The first thickness is less than the second thickness. A mold frame channel is opened on the moving mold frame, a mold core channel is opened on the moving mold core, an insert channel is opened on the moving mold insert, and an insert sleeve has an insert sleeve channel. The mold frame channel, mold core channel, insert channel, and insert sleeve channel are sequentially connected to form a slide groove. The size of the mold frame channel matches the second thickness, and the sizes of the mold core channel, insert channel, and insert sleeve channel all match the first thickness. The stopper is slidably arranged in the slide groove.

[0009] Furthermore, the insert fixing structure after automatic feeding of die-cast inserts provided by this utility model may also have the following features: the first thickness dimension of the blocker is 8mm.

[0010] Furthermore, the insert fixing structure after automatic feeding of die-cast inserts provided by this utility model may also have the following features: the stopper is made of hot work die steel, preferably H13 hot work die steel.

[0011] Furthermore, in the insert fixing structure after automatic feeding of die-cast inserts provided by this utility model, a limiting mechanism can also be set. The limiting mechanism includes a vertically arranged limiting stop, which has a through hole for the front end of the longitudinal hydraulic core puller to pass through. The limiting stop is fixed on the bracket.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In the insert fixing structure provided by this utility model after automatic feeding of die-casting inserts, an additional set of longitudinal hydraulic core pullers is added vertically to the existing hydraulic core pullers in the die-casting equipment. This set of hydraulic core pullers drives a stopper to rigidly fix the insert. After mold closing and injection starting, the die-casting pressure applies pressure to the stopper side and causes displacement. Due to the reaction force of the stopper, the rear end of the insert is rigidly fixed, and the insert remains stationary, preventing displacement under casting pressure and ensuring that the insert coordinates meet design requirements.

[0014] The insert fixing structure provided by this utility model, after automatic feeding of die-casting inserts, ensures the normal operation of die-casting production, greatly improving its stability and continuity during production, and ensuring stable casting quality while completely eliminating the risk of dimensional defects in inserts. Furthermore, in subsequent inspection, the process of manually measuring insert height has been gradually eliminated, significantly reducing labor and material costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating the implantation of inserts in existing die-cast parts.

[0016] Figure 2 This is a schematic diagram of the insert fixing structure after automatic feeding of the die-cast insert in an embodiment of this utility model.

[0017] In the diagram, the following are labeled: Insert 1; Hydraulic core puller 2; Guide core 3; Insert sleeve 4; Insert sleeve 4'; Moving mold frame 5; Moving mold core 6; Moving mold insert 7; Air pipe 8; Longitudinal hydraulic core puller 9; Core puller end protrusion 9a; Connector 10; Blocker 11; Front section of blocker 11a; Rear section of blocker 11b; Blocker end protrusion 11c. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments, in conjunction with the accompanying drawings, will specifically illustrate the technical solution of this utility model.

[0019] This embodiment provides an insert fixing structure after automatic feeding of die-casting inserts, and this insert fixing structure is installed on the die-casting equipment. For example... Figure 2As shown, the left and right parts of the die-casting equipment in this embodiment have a symmetrical structure, which can realize the implantation of two inserts.

[0020] like Figure 2 As shown, to facilitate the operation of the die-casting equipment, the insert fixing structure in this embodiment is also set into two sets, forming a symmetrical structure. The insert fixing structure after automatic feeding of the die-casting insert in this embodiment includes a longitudinal hydraulic core puller 9, a stopper 11, a connector 10, and a slide.

[0021] The longitudinal hydraulic core puller 9 is horizontally positioned and mounted on the frame of the die-casting equipment. A stopper 11 is mounted at the front end of the longitudinal hydraulic core puller 9 via a connector 10. Specifically, the front end of the longitudinal hydraulic core puller 9 has a core puller end protrusion 9a, and the rear end of the stopper 11 has a stopper end protrusion 11c. One edge of the connector 10 has a first engaging protrusion that mates with the core puller end protrusion, and the other edge of the connector 10 has a second engaging protrusion that mates with the end protrusion. The internal space of the connector 10 matches the shape of the core puller end protrusion 9a and the stopper end protrusion 11c, and the connector 10 is engaged with the longitudinal hydraulic core puller 9 and the stopper 11.

[0022] The stopper 11 is made of hot work die steel; in this embodiment, H13 hot work die steel is used. The thickness of the front section 11a of the stopper 11 is the first thickness, and the thickness of the rear section 11b of the stopper 11 is the second thickness, with the first thickness being less than the second thickness. The first thickness of the stopper 11 is 8 mm. The second thickness can be set according to the specifications of the die-casting equipment.

[0023] The moving mold base 5, moving mold core 6, moving mold insert 7, and insert sleeve 4' are components of the die-casting equipment. This utility model modifies them: the moving mold base 5 has a mold base channel, the moving mold core 6 has a mold core channel, the moving mold insert 7 has an insert channel, and the insert sleeve 4' has an insert sleeve channel, wherein the insert sleeve channel has an opening only on one side of the insert sleeve 4'. The mold base channel, mold core channel, insert channel, and insert sleeve channel are sequentially connected to form a slide groove, and the size of the mold base channel matches the second thickness, while the sizes of the mold core channel, insert channel, and insert sleeve channel all match the first thickness. A stopper 11 is slidably disposed in the slide groove, and the stopper 11 is driven by a longitudinal hydraulic core puller 9 to move horizontally.

[0024] In this embodiment, the moving mold frame 5 is also provided with an air blowing hole, and an air blowing pipe 8 is installed inside the air blowing hole. The air blowing pipe 8 is connected to a fan or air pump. When cleaning and maintaining the equipment, water stains and other foreign objects in the insert mounting holes can be removed through the air blowing pipe 8.

[0025] The insert fixing structure after automatic feeding of the die-casting insert in this embodiment also includes a limiting mechanism. The limiting mechanism consists of a limiting stop 12 and a bracket. The limiting stop 12 is vertically arranged and has a through hole for the front end of the longitudinal hydraulic core puller 9 to pass through. The limiting stop 12 is fixed on the bracket 13, and the bracket 13 is fixed on the frame of the die-casting equipment. The limiting mechanism can ensure the smooth operation of the longitudinal hydraulic core puller 9 and prevent it from shifting up and down.

[0026] Compared with the prior art, the insert fixing structure after automatic feeding of die-cast inserts in this embodiment has the following functions and effects: See Figure 2 The left part of the diagram shows the insert automatically entering the loading position, with the stopper not working; the right part shows the front section 11a of the stopper rigidly limiting and fixing the insert 1 during molding. After the mold closing and injection are started, the die-casting pressure applies pressure to the stopper side and causes displacement. Due to the reaction force of the stopper, the rear end of the insert is rigidly fixed, and the insert is in a fixed and static state, preventing displacement of the insert under the casting pressure, so that the insert coordinates meet the design requirements.

[0027] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. An insert fixing structure after automatic feeding of die-cast inserts, characterized in that: It includes a longitudinal hydraulic core puller, which is horizontally positioned, and a stopper is mounted at its front end via a connector. The longitudinal hydraulic core puller has a core puller end protrusion at its front end, and the blocker has a blocker end protrusion at its rear end. One side edge of the connector has a first locking protrusion that mates with the core puller end protrusion, and the other side edge of the connector has a second locking protrusion that mates with the blocker end protrusion. The front section of the blocker has a first thickness, and the rear section of the blocker has a second thickness, wherein the first thickness is smaller than the second thickness. The moving mold base has a mold base channel, the moving mold core has a mold core channel, the moving mold insert has an insert channel, and the insert sleeve has an insert sleeve channel. The mold base channel, the mold core channel, the insert channel, and the insert sleeve channel are sequentially connected to form a sliding groove. The size of the mold base channel matches the second thickness, and the sizes of the mold core channel, the insert channel, and the insert sleeve channel all match the first thickness. The blocker is slidably disposed in the groove.

2. The insert fixing structure after automatic feeding of die-cast inserts as described in claim 1, characterized in that: in, The first thickness dimension of the blocker is 8mm.

3. The insert fixing structure after automatic feeding of die-cast inserts as described in claim 1, characterized in that: in, The stopper is made of hot work die steel.

4. The insert fixing structure after automatic feeding of die-cast inserts as described in claim 1, characterized in that: It also includes a limiting mechanism. The limiting mechanism includes a vertically arranged limiting stop, which has a through hole for the front end of the longitudinal hydraulic core puller to pass through, and the limiting stop is fixed on the bracket.

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