CN104722762B - Shaping die for formed blank - Google Patents

Abstract

The utility model provides a formed blank plastic mould, including last mould and lower mould, it includes the mould pedestal to go up the mould, go up mould mold insert and at least a pair of shovel base, it can be installed in the lower part of last mould pedestal with moving about from top to bottom to go up the mould mold insert, and it is provided with pre-compaction spring to go up between mould mold insert and the last mould pedestal, shovel base fixed mounting is at the lower extreme of last mould pedestal, the lower mould includes the lower mould pedestal, lower mould mold insert and at least a pair of slider, the lower mould mold insert is installed on the upper portion of lower mould pedestal, at least a pair of slider can set up on the upper portion surface of lower mould pedestal with sliding relatively, shovel base and slider one-to-one set up, when going up mould and lower mould compound die, go up the mould pedestal and go up mould mold insert low pressure forming blank through. This mould can carry out high-efficient, accurate plastic to the shaping blank.

Description

A shaping mold for forming blanks

technical field

The invention relates to a mould, in particular to a mold for shaping blanks.

Background technique

Metal powder injection molding technology is a new molding technology. It has the advantages of being able to form complex-shaped products at one time, high dimensional accuracy, no need for machining or only minimal processing, and low preparation costs. It can also form complex shapes or are difficult to cut. The processed ceramic and metal parts have a wide range of application prospects. After injection molding, it is necessary to degrease and sinter the molded green parts, and the sintered molded parts have poor appearance and size after shrinkage and deformation, so a plastic mold for correcting them is needed.

Contents of the invention

In order to correct the problems of deformation and poor size of degreasing and sintered metal powder molded parts, the invention provides an efficient, accurate and safe mold for shaping blanks.

To achieve the above object, the present invention adopts the following technical solutions:

A shaping mold for forming blanks, including an upper mold and a lower mold, the upper mold includes an upper mold base, an upper mold insert and at least a pair of shovel bases, and the upper mold insert can be movable up and down on the The lower part of the upper die base body, and a preload spring is arranged between the upper die insert and the upper die base body, the shovel base is fixedly installed on the lower end of the upper die base body, and the lower die includes Lower mold base body, lower mold insert and at least one pair of sliders, the lower mold insert is installed on the upper part of the lower mold base body, and the at least one pair of sliders are on the upper surface of the lower mold base body It can be set relatively slidably, the shovel base and the slider are set one-to-one, when the upper mold and the lower mold are closed, the upper mold seat drives the upper mold through the pre-compression spring The mold insert presses down to form the blank, and the lower mold insert on the lower mold seat body bears up against the formed blank, and the shovel base drives the corresponding sliders to move in pairs from outside to inside, and from outside to Internally extruded blanks.

further:

A slider spring is arranged on the slider, and the slider spring returns the slider to its outer initial position when the shovel base releases the slider.

The lower die also includes a pair of slider pressing plates, and a slider limiting groove is formed between the opposing slider pressing plates, and the slider is limited to slide along the slider limiting groove.

The upper mold base includes an upper template and an upper splint fixed on the lower part of the upper template. The upper splint is provided with a through hole for the movement of the upper mold insert, and one end of the pre-compression spring is placed on the In the upper template, the other end is connected to the upper mold insert through the through hole of the upper splint.

A stripping spring is arranged between the lower mold insert and the lower mold base, and the lower mold insert can be moved up and down on the upper part of the lower mold base through the stripping spring. When the upper mold insert releases the molded blank, the stripping spring pushes the lower mold insert up to drive the molded blank to rise for a certain distance.

The lower mold base includes a lower template and a lower clamping plate fixed on the upper part of the lower template, the lower clamping plate is provided with a through hole for the movement of the lower mold insert, and one end of the stripping spring is placed on the In the lower template, the other end is connected to the lower mold insert through the through hole of the lower splint.

Guide posts/guide holes are provided on the upper die base, and guide holes/guide posts matching the guide posts/guide holes are provided on the lower die base.

A pair of the shovel base and the slide block are respectively arranged in the transverse direction and the longitudinal direction.

A pair of the shovel base and the slider are respectively arranged in the horizontal direction and the vertical direction, and there are four slider pressing plates, which are distributed axially symmetrically, and each slider is limited to two adjacent slider pressing plates between.

Beneficial effects of the present invention:

The shaping mold for forming blanks of the present invention has the advantages of high efficiency, precision and safety, can effectively improve the bad appearance and deformation of forming blanks, and significantly improve the shape and dimensional accuracy of products. In addition to being conducive to shaping the blank to meet the dimensional accuracy requirements, the forming and shaping die of the present invention also has the advantages of simple structure, high work efficiency, high reliability, and convenient maintenance. Moreover, according to the requirements of different shapes and sizes of shaping parts, based on the present invention, it is also beneficial to adopt corresponding shapes and sizes of sliders, upper and lower mold inserts to meet the shaping of different parts, which has a high degree of flexibility.

Description of drawings

Fig. 1 is the cross-sectional view of the main angle of view of an embodiment of the molding blank shaping die of the present invention;

Fig. 2 is a schematic view of the structure of an upper mold in an embodiment of the present invention;

Fig. 3 is a schematic structural view of the axial view angle of the lower mold of an embodiment of the present invention;

Fig. 4 is an exploded schematic view of an embodiment of the shaping mold for forming blanks according to the present invention.

detailed description

Embodiments of the present invention will be described in detail below. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

Referring to Fig. 1, in one embodiment, a kind of molding blank plastic mold comprises upper mold and lower mold, wherein, upper mold comprises upper mold base body, upper mold insert 4 and each horizontally and longitudinally respectively arranged A pair of shovel bases 5, the upper die insert 4 can be mounted on the lower part of the upper die base body up and down, and a pre-loaded spring 2 is arranged between the upper die insert 4 and the upper die base body, and the shovel base 5 is fixedly installed on the The lower end of the upper mold base body, the lower mold includes a lower mold base body, a lower mold insert 10 and a pair of slide blocks 8 respectively arranged horizontally and vertically, and the lower mold insert 10 is installed on the top of the lower mold base body. The slide block 8 can be relatively slidably arranged on the upper surface of the lower mold base body, and the shovel base 5 and the slide block 8 are arranged one-to-one. The mold insert 4 presses down to form the blank, and the lower mold insert 10 on the lower mold base bears upward against the formed blank, and the shovel base 5 drives the corresponding sliders 8 to move in pairs from outside to inside, squeezing from outside to inside. Pressed blanks. In the embodiment shown in Fig. 1-Fig. 4, there are two pairs of shovel base 5 and slide block 8 respectively, which are respectively arranged in horizontal and vertical directions. In some other embodiments, there may be only one pair of the shovel base 5 and the slide block 8. In this case, the slide block 8 only implements shaping to the formed blank in one horizontal direction. Preferably, the shovel base 5 and the corresponding sliding block 8 form an inclined surface mating structure that can slide relative to each other on the opposite surface. Further, the slider may include a sloped body and a base body located below the sloped body and having a peripheral dimension larger than that of the sloped body to form a step. The bottom end of the shovel base has a flat surface connected to its inclined surface through a broken line.

In a preferred embodiment, the slider 8 is provided with a slider spring 9 , and the slider spring 9 returns the slider 8 to its outer initial position when the shovel base 5 releases the slider 8 .

The lower mold can also include slider pressing plates 7 arranged in pairs, and a slider 8 limiting groove is formed between the opposite slider pressing plates 7, and the slider 8 is restricted to slide along the slider 8 limiting groove. Preferably, there are four slider pressing plates 7 in total, two by two are distributed axially symmetrically, and each slider 8 is limited between two adjacent slider pressing plates 7 .

In some embodiments, the upper mold body includes an upper template 1 and an upper splint 6 fixed on the lower part of the upper template 1 , and the two can be fixed together by screws 3 . The upper splint 6 is provided with a through hole for the upper die insert 4 to move. One end of the preload spring 2 is placed in the upper die 1 , and the other end is connected to the upper die insert 4 through the through hole of the upper splint 6 . Preferably, the upper mold insert 4 is constrained in the upper splint 6 and can slide up and down by 3-5 mm.

In a preferred embodiment, a stripping spring 11 is arranged between the lower mold insert 10 and the lower mold base, and the lower mold insert 10 can be moved up and down on the upper part of the lower mold base through the stripping spring 11. When the upper mold insert 4 releases the molded blank, the spring 11 pushes the lower mold insert 10 up to drive the molded blank to rise a certain distance.

In a more preferred embodiment, the lower mold base includes a lower template 13 and a lower clamping plate 12 fixed on the upper part of the lower template 13 . The lower clamping plate 12 is provided with a through hole for the lower mold insert 10 to move. One end of the stripping spring 11 is placed in the lower template 13, and the other end is connected to the lower mold insert 10 through the through hole of the lower clamping plate 12. Preferably, the lower mold insert 10 is constrained in the lower splint 12 and can slide up and down by 3-4 mm.

More preferably, guide pillars 14 are provided on the upper die base, and guide holes matching the guide pillars 14 are provided on the lower die base. Guide holes can also be set on the upper die base, and guide posts can be set on the lower die base.

The working process of the preferred embodiment is described as follows.

When there is a driving force to press the upper plate, the guide post acts as a guide to ensure the clamping accuracy of the upper mold and the lower mold. The pre-loaded spring 2 drives the upper mold insert 4 to press down to form the blank, and the shovel base 5 drives the slider 8 Squeeze from outside to inside to correct the shape of the formed blank. When the upper and lower molds are closed, the pre-compression spring 2, slider spring 9, and stripping spring 11 are all compressed in place. The upper mold insert 4, lower mold insert 10 and slider 8 The flatness (or desired shape) of the formed blank in the vertical direction and horizontal direction can be shaped in place. After shaping, the upper mold is driven to rise, the stripping spring 11 drives the lower mold insert 10 to raise the product height by 2-5mm for easy pick-up, and the slide block spring 9 drives the slide block 8 to retreat for easy pick-up.

The above content is a further detailed description of the present invention in conjunction with specific/preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, they can also make some substitutions or modifications to the described embodiments, and these substitutions or modifications should be regarded as Belong to the protection scope of the present invention.

Claims (7)

1. a kind of moulded blank shaping mould, including upper die and lower die it is characterised in that described upper mould include upper bolster body, on Mould mold insert and at least one pair of shovel base, described upper mould mold insert can be arranged on the bottom of described upper bolster body up and downly, and institute State and be provided with pre-compressed spring between mould mold insert and described upper bolster body, described shovel base is fixedly mounted under described upper bolster body End, described lower mould includes die shoe body, lower mould mold insert and at least one pair of slide block, and described lower mould mold insert is arranged on described die shoe The top of body, at least one pair of slide block described can slidably be arranged relatively in the upper face of described die shoe body, described shovel base with The one-to-one setting of described slide block, when described upper mould and described lower mould matched moulds, described upper bolster body is driven by described pre-compressed spring Move described upper mould mold insert down-pressing forming blank, the described lower mould mold insert on described die shoe body withstands moulded blank upwards, described Shovel base drives the ecto-entad motion in couples of corresponding slide block, from outside inside extrusion molding blank, described lower mould mold insert and institute State and between die shoe body, be provided with de- material spring, described lower mould mold insert can be arranged on institute by described de- material spring up and downly State the top of die shoe body, described de- material spring on described during mould mold insert release moulded blank will under push up to drive on mould mold insert Described moulded blank rises a segment distance, and described die shoe body includes lower template and is fixed on the lower folder on the top of described lower template Plate, described lower plate offers the through hole for described lower mould mold insert activity, and one end of described de- material spring sinks puts in described lower mould In plate, the through hole through described lower plate for the other end is connected on described lower mould mold insert.

2. moulded blank shaping mould as claimed in claim 1 is it is characterised in that be provided with sliding block spring on described slide block, Described sliding block spring makes described slide block revert to initial position outside it when described shovel base discharges described slide block.

3. moulded blank shaping mould as claimed in claim 1 is it is characterised in that described lower mould also includes the cunning being arranged in pairs Block pressur plate, forms slide block stopper slot between relative slide block pressing plate, described slide block is limited sliding along in described slide block stopper slot Dynamic.

4. the moulded blank shaping mould as described in any one of claims 1 to 3 is it is characterised in that described upper bolster body includes Cope match-plate pattern and be fixed on described cope match-plate pattern bottom train wheel bridge, described train wheel bridge offers logical for described upper mould mold insert activity Hole, one end of described pre-compressed spring sinks puts in described cope match-plate pattern, and the through hole through described train wheel bridge for the other end is connected to described upper mould On mold insert.

5. the moulded blank shaping mould as described in any one of claims 1 to 3 is it is characterised in that set on described upper bolster body It is equipped with guide pillar/guide hole, described die shoe body is provided with the guide hole/guide pillar being matched with described guide pillar/guide hole.

6. the moulded blank shaping mould as described in any one of claims 1 to 3 is it is characterised in that divide on horizontal and vertical It is not provided with shovel base and described slide block described in a pair.

7. moulded blank shaping mould as claimed in claim 3 is it is characterised in that be respectively arranged with one on horizontal and vertical To described shovel base and described slide block, described slide block pressing plate has four, is axisymmetricly distributed two-by-two, and each slide block is limited in phase Between two adjacent slide block pressing plates.