CN2923265Y - Circular-hole forming mould - Google Patents

Abstract

The utility model discloses a circular hole forming mold which comprises an upper mold cavity, a lower cavity, a parting surface and a mold core positioned in the upper and lower mold cavities. The parting surface divides the mold core into an upper mold core and a lower mold core with the same shape. The utility model is characterized in that the upper mold core consists of a top face, a bottom surface and a profile. The profile is vertical to the top face, and the top face and the bottom surface meets in a linear section. The top face consists of a semi circle arch part, two extended parts on the two ends of the semi circle part as well as a linear section connected with the two extended parts. The bottom faces of both the upper and lower mold cores are on the same plane as the parting surface. The top face of the upper mold core is parallel to top face of the lower mold core. Using the structure above, the circular hole mold is able to obtain a completely circular hole which is able to be demoulded directly, which makes the structure of the mold simplified and reliable by saving a loose core and a slider for the mold.

Description

The circular hole mould

Technical field

The utility model relates to a kind of circular hole mould, specifically, and the circular hole mould when relating to the axis direction of circular hole and mold releasability direction and having angle.

Background technology

At present, because the special shape of circular hole, when the axis direction of circular hole, can't be designed to circular hole to crash during than wide-angle with the existence of mold releasability direction.Design methods existing or circular hole is designed to the demoulding in the same direction, or be to utilize slide block to come the moulding circular hole.

When circular hole is designed to the demoulding in the same direction,, then can make the shape of circular hole be difficult to keep, often can't meet design requirement if angle is bigger between the axis direction of circular hole and mold releasability direction.All can increase the manufacturing cost of product and utilize slide block and loose core.

Novel content

The purpose of this utility model is, a kind of circular hole mould is provided, to overcome that round hole axial and mold releasability direction have angle and the technical problem that can't adopt the method straight forming that circular hole crashes.

In order to achieve the above object, the technical solution of the utility model is as follows:

A kind of circular hole mould comprises upper cavity, lower mode cavity, die joint and places the interior core rod of upper and lower die cavity; Described die joint is divided into identical upper mold core of shape and lower mold core with core rod; It is characterized in that upper mold core is made up of end face, bottom surface and side; Lateral vertical wherein is in end face, and described end face and bottom surface intersect at a straightway; Described end face is made up of the extension and the described straightway at semicircle segmental arc, semi arch two ends; Straightway wherein connects two extensions; The bottom surface of upper mold core, the bottom surface of lower mold core and die joint are in the same plane, and the end face of upper mold core is parallel with the end face of lower mold core.

Adopt the circular hole mould of said structure, just can obtain a complete circular hole that can direct demold, thereby can avoid loosing core and slide block on the mould, make mould structure simple, reliably.

Described extension and semicircle segmental arc are tangent in both joinings, and the end face of core rod is shaped as semicircular arc and half square stack.

Description of drawings

Fig. 1 is the internal structure schematic diagram of circular hole mould of the present utility model; α wherein is the angle (0 °＜α≤87 °) of circle hole centreline and stripping direction X;

Fig. 2 and Fig. 3 are the schematic diagram of the upper and lower mould core rod of mould of the present utility model;

Fig. 4 is the vertical view of the core rod among Fig. 2 and Fig. 3.

The specific embodiment

According to Fig. 1 to Fig. 4, provide preferred embodiment of the present utility model, and described in detail below, enable to understand better function of the present utility model, characteristics.

As shown in the figure, circular hole mould of the present utility model comprises upper cavity 1, lower mode cavity 2, die joint 3 and places the interior core rod of upper and lower die cavity.Core rod respectively with upper and lower die cavity the 1, the 2nd, one, do not need with slide block or loose core.Described die joint 3 is divided into shape identical upper mold core 4 and lower mold core 5 with core rod.Upper mold core 4 is made up of end face 41, bottom surface 42 and side 43.Side 43 wherein is perpendicular to end face 41, and described end face 41 and bottom surface 42 intersect at a straightway 413.Described end face 41 is made up of the extension 412 and the described straightway 413 at semicircle segmental arc 411, semi arch 411 two ends.Straightway 413 wherein connects two extensions 412.The bottom surface 42 of upper mold core 4, the bottom surface of lower mold core 5 52 and die joint 3 are in the same plane, and the end face 41 of upper mold core 4 is parallel with the end face 51 of lower mold core 5.Described extension 412 is tangent in both joinings with semicircle segmental arc 411.

In the making, at first setting die joint, circular hole is divided into two parts along mould die joint (to meeting), is not circle from die joint, and the latter half is semicircle, and top is divided into the square-section tangent with circular hole.These two parts can both be distinguished the demoulding (in opposite direction) separately.Then, with the stack of this two parts, just can obtain a complete circular hole that can direct demold.

Use the utility model in product design, can save loosing core or slide block on the required mould of shaped article.Thereby can make mould structure simple, reduce product cost.

The front provides the description to preferred embodiment, so that any technical staff in this area can use or utilize the utility model.To this preferred embodiment, those skilled in the art can make various modifications or conversion on the basis that does not break away from the utility model principle.Should be appreciated that these modifications or conversion do not break away from protection domain of the present utility model.

Claims (2)

1, a kind of circular hole mould comprises upper cavity, lower mode cavity, die joint and places the interior core rod of upper and lower die cavity; Described die joint is divided into identical upper mold core of shape and lower mold core with core rod; It is characterized in that upper mold core is made up of end face, bottom surface and side; Lateral vertical wherein is in end face, and described end face and bottom surface intersect at a straightway;

Described end face is made up of the extension and the described straightway at semicircle segmental arc, semi arch two ends; Straightway wherein connects two extensions;

The bottom surface of upper mold core, the bottom surface of lower mold core and die joint are in the same plane, and the end face of upper mold core is parallel with the end face of lower mold core.

2, circular hole mould as claimed in claim 1 is characterized in that, described extension and semicircle segmental arc are tangent in both joinings.

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