CN203390183U

CN203390183U - Center-gated mould

Info

Publication number: CN203390183U
Application number: CN201320457489.6U
Authority: CN
Inventors: 薛瑞
Original assignee: Nanjing Jin Cheng Precision Optical Machinery Co Ltd
Current assignee: Nanjing Jin Cheng Precision Optical Machinery Co Ltd
Priority date: 2013-07-29
Filing date: 2013-07-29
Publication date: 2014-01-15
Anticipated expiration: 2023-07-29

Abstract

The utility model provides a center-gated mould which comprises a movable mould, a fixed mould, a center spreader, a center flow guide sleeve and a cross gate. The movable mould and the fixed mould are provided with a movable mould insert and a fixed mould insert respectively. The movable mould insert and the fixed mould insert are matched to form a cavity. The center flow guide sleeve is embedded in the fixed mould through the fixed mould insert, and the taper portion of the center spreader penetrates the cavity to extend into the center flow guide sleeve to form a center gate. A center sprue is formed in one end of the center gate and connected with the cavity, the other end of the center gate is connected with the cross gate, a first arc groove surrounding the taper portion is formed in the surface of the taper portion of the center spreader, and a second arc groove is formed in the inner surface of the fixed mould insert. Due to the fact that the arc groove is formed in the center spreader, wrapping force of a product in the movable mould is increased, and the problem that the center gate of a traditional center-gated mould cannot be pulled apart, and the product is retained in the fixed mould and cannot be taken out is solved.

Description

A kind of trumpet assembly mould

Technical field

The utility model relates to extrusion process and Design of Dies field, the trumpet assembly mould that especially a kind of central runner is easily broken.

Background technology

In normal die casting, the package power of product on dynamic model is greater than the package power of cover half.During die sinking, product is stayed in dynamic model, then by push rod by product from dynamic die liftout, take out product.The running gate system of mould is according to entering the position of die cavity and the shape of ingate, can be divided into side gate, trumpet assembly, circular gate and spot pouring mouth, wherein for cylinder class and Shell-Class die casting, adopting trumpet assembly to have especially gives prominence to a little, place, its ingate Kai aperture, at center, spreader is set simultaneously, centre from die cavity when filling imports, flow process is short, smooth gas discharge, die casting, running gate system and the projected area of overflowing system on mold parting surface are less, can improve the force-bearing situation of die casting machine, and the mould features compact structure, but its shortcoming is central runner to be difficult for breaking, cast gate is removed more difficult.

Mould for trumpet assembly design, during die sinking, need the strength of pattern tool die sinking that cross gate and central runner are broken separated, and the diameter of cross gate and central runner junction is conventionally larger at 24-25mm(, the flow that different product needs is different, and diameter is also different), need very large strength just can break, this strength is greater than the package power of product on dynamic model, thereby may cause product to stay in cover half when die sinking, cannot take out.

Utility model content

For the deficiencies in the prior art, the utility model aims to provide a kind of trumpet assembly mould of easy die sinking.

For reaching above-mentioned purpose, the utility model proposes a kind of trumpet assembly mould, comprise dynamic model, cover half, center spreader, center flow guide sleeve and cross gate, described dynamic model and cover half are respectively arranged with moving die insert and fixed die insert, and moving die insert and fixed die insert coordinate formation one die cavity, described center flow guide sleeve is nested in cover half by fixed die insert, the tapering of described center spreader is passed described die cavity and is extended in the flow guide sleeve of center to form a central runner, one end of this central runner is formed with the trumpet assembly and the other end that are connected with die cavity and is connected with cross gate, the surface, tapering of described center spreader is formed with the first circular groove around tapering, the inner surface of fixed die insert is formed with the second circular groove.

Further, the distance on the surface, tapering of the bottom surface of described the first circular groove and described center spreader is 0.3mm-0.5mm.

From above the technical solution of the utility model, the trumpet assembly mould that the utility model provides by arranging circular groove on central guiding flow cone, thereby increase the package power of product in dynamic model, balance is broken the strength of central runner, thereby guarantee both can break smoothly central runner, product is stayed in dynamic model, and can make product be ejected smoothly by push rod, takes out intact product.

Accompanying drawing explanation

Fig. 1 is the structural representation of the trumpet assembly mould of the utility model preferred embodiment.

Fig. 2 is the enlarged diagram of central guiding flow cone surface groove in Fig. 1 embodiment.

Fig. 3 arranges the enlarged diagram of groove on fixed die insert in Fig. 1 embodiment.

The specific embodiment

In order more to understand technology contents of the present utility model, especially exemplified by specific embodiment and coordinate appended graphic being described as follows.

Shown in figure 1-3, according to preferred embodiment of the present utility model, trumpet assembly mould comprises dynamic model 1, cover half 2, center spreader 3, center flow guide sleeve 4 and cross gate 5, in dynamic model 1, be provided with moving die insert 1A, cover half 2 is provided with fixed die insert 2A, fixed die insert 2A coordinates with moving die insert 1A and forms a die cavity, this die cavity is used to form cast product P, center flow guide sleeve 4 is nested in cover half 2 by fixed die insert 2A, the tapering 3A of center spreader 3 passes die cavity and extends in center flow guide sleeve 4 to form a central runner 6, one end of this central runner is formed with the trumpet assembly 7 and the other end that are connected with die cavity and is connected with cross gate 5, the surface, tapering of center spreader 3 is formed with at least 1 circular groove 8 around tapering.It is 0.3mm-0.5mm that the surface, tapering of the present embodiment Zhong， center spreader 3 is formed with around 2 circular grooves, the 8 ，Qi bottom surfaces in tapering and the distance between the surface, tapering of center spreader 3.

In the present embodiment, as shown in figures 1 and 3, on fixed die insert, have circular groove 8 ', in the die cavity of mould, on formed product, also have arc-shaped convex.

Shown in figure 1, on trumpet assembly mould, also comprise push rod 9 and ejector pin retaining plate 10, for the product of dynamic model being ejected after die sinking.At ejector pin retaining plate 10 rear, be also provided with push pedal 11 and push pedal baffle plate 12.

Central runner 6 is with the diameter of cross gate 5 coupling parts roughly at 24-25mm, and cross gate 5 connects sprue 13 and central runner 6.Sprue 6 is formed in a sprue bush 14, and sprue bush is embedded in cover half bedplate 20.Dynamic model 1 is connected with dynamic model cage plate 15 and cover half 2 is connected with cover half cage plate 16, in dynamic model cage plate 15 and cover half cage plate 16, be respectively arranged with pressing plate 17 and guide pin bushing 18, in aforementioned cover half bedplate 20, be formed with a guide pillar 21 and also pass the guide pin bushing 18 of aforementioned dynamic model cage plate 15 and cover half cage plate 16, for guiding the cooperation of dynamic model and cover half, in relative one end of cover half bedplate 20, be also provided with in pin 19.

In sum, the trumpet assembly mould that the utility model provides by arranging circular groove on central guiding flow cone, thereby increase the package power of product in dynamic model, balance is broken the strength of central runner, thereby guarantees both can break smoothly central runner, and product is stayed in dynamic model, and can make product be ejected smoothly by push rod, take out intact product, so solve traditional trumpet assembly mold center running channel and break difficult problem, there is the market competitiveness.

Although the utility model discloses as above with preferred embodiment, so it is not in order to limit the utility model.Under the utility model, in technical field, have and conventionally know the knowledgeable, within not departing from spirit and scope of the present utility model, when being used for a variety of modifications and variations.Therefore, protection domain of the present utility model is when being as the criterion depending on claims person of defining.

Claims

1. a trumpet assembly mould, it is characterized in that, comprise dynamic model, cover half, center spreader, center flow guide sleeve and cross gate, described dynamic model and cover half are respectively arranged with moving die insert and fixed die insert, and moving die insert and fixed die insert coordinate formation one die cavity, described center flow guide sleeve is nested in cover half by fixed die insert, the tapering of described center spreader is passed described die cavity and is extended in the flow guide sleeve of center to form a central runner, one end of this central runner is formed with the trumpet assembly and the other end that are connected with die cavity and is connected with cross gate, the surface, tapering of described center spreader is formed with the first circular groove around tapering, the inner surface of fixed die insert is formed with the second circular groove.

2. trumpet assembly mould according to claim 1, is characterized in that, the distance on the surface, tapering of the bottom surface of described the first circular groove and described center spreader is 0.3mm-0.5mm.