CN2513758Y

CN2513758Y - Press for powder shaper

Info

Publication number: CN2513758Y
Application number: CN 01267523
Authority: CN
Inventors: 林明通
Original assignee: Yuecun Science & Technology Co Ltd
Current assignee: Yuecun Science & Technology Co Ltd
Priority date: 2001-10-10
Filing date: 2001-10-10
Publication date: 2002-10-02
Anticipated expiration: 2011-10-10

Abstract

A pressurizing device of a powder forming machine converts a circular motion into an up-and-down motion via an uprush cam, a float upward proof cam, an extruding cam and a plurality of different transmission arms, which are arranged at the lower part of the powder forming machine. One end of the uprush transmission arm is provided with a seat, the sides of which are provided fixedly with a lifting rod respectively. Each lifting rod extends upwards and is provided with a lifting seat. One uprush is arranged under the lifting seat with an interval distance and an upper die and a middle die protruding downwards are arranged at the bottom center of the uprush. A die cavity is formed inside of the middle die. The bottom of the middle die is connected with a descending plate by a connecting rod and the bottom of the descending plate is provided with a middle column downwards. When the utility model is pressurizing, because of the long stroke at the lower dead centre ST, the air discharge performance of the finished product is very good. The utility model has the advantages of stable gravity centre and good quality of the finished product.

Description

The pressue device of powder former

(1) technical field

The utility model relates to a kind of pressue device of powder former.

(2) background technology

The powder pressure is formed type, be a program in the powder metallurgy continuous process, the mould of powder compacting mainly partly is made up of upper punch, Xia Chong and middle mould three, with regard to pressure knot body moves back mould, the powder press can divide motionless formula of exterior sheathing and exterior sheathing lower-moving type, exterior sheathing not dynamic formula is depressed into final stage for pressing the knot body in middle mould place, rush under the mat to rise and will press the knot body by withdrawing from the mould, move back under the exterior sheathing formula then for utilize exterior sheathing to continue to descend to drive external mold descends but will descend to dash fixing make to press tie body and withdraw from mould.

The powder former structure of commonly using with general traditional type and discussing, novel patent case as TaiWan, China No. 88216034 " powder former structure ", it mainly is to be provided with first cam, second cam in the place, top of powder former, be to control first cam, the rotation of second cam when in action with the bent axle on powder former top, because of drives structure is the top that is positioned at powder former, so the comparatively unsettled shortcoming of center of gravity is arranged.

Its another shortcoming is: because of the person of commonly using is with the bent axle transmission, when upper punch in adding when pressing to finished product, because (as shown in Figure 11) lacked very much in the ST position of bottom dead centre, that is upper punch presses down and contacts to the time of metal dust too short, so when molding finished product, be that the bad problem of venting quality can take place, so can make finished product inside the defective products in space occur having.

(3) utility model content

The purpose of this utility model is to provide a kind of pressue device of powder former, and in when pressurization, the stroke that is positioned at bottom dead centre ST position is longer, and it is preferable to make finished product discharge the performance of air, has the good advantage of quality of finished after steadily of centre of gravity and the moulding.

In order to achieve the above object, the utility model provides a kind of pressue device of powder former, it is characterized in that: include: be located at a motor of powder former bottom, this motor connects a power transmission shaft, is provided with in regular turn to prevent floating overhead cam, upper punch cam and extrusion cam on power transmission shaft;

On powder former, correspond respectively to the upper punch cam, prevent floating overhead cam and extrusion cam place respectively with a fulcrum be pivoted the upper punch transmission arm, prevent floating on transmission arm and extrusion transmission arm;

One end of this upper punch transmission arm is provided with a pedestal, the side of this pedestal is fixedly arranged on respectively on the elevating lever, each elevating lever extension up respectively is provided with an elevating bracket, is provided with a upper punch in the elevating bracket below with spacing distance, protrudes out down in the upper punch bottom center and is provided with patrix;

Mould in one, in the inner die cavity that forms of middle mould, the Yu Zhongmo bottom is connected with a decline plate by connecting rod, and court has a center pillar in decline plate bottom;

Mould below during once nest plate is fixed at is once towards being fixedly arranged on the low punch plate;

In preventing that the floating end in addition of going up transmission arm is provided with a seat board that is fixedly arranged on the center pillar;

End in addition in the extrusion transmission arm is provided with a flat board, and this flat board and center pillar set firmly and be one.

The pressue device of described powder former is characterized in that: it is the die cavity below of mould in being right against that this time dashed.

Powder former pressue device of the present utility model, be can be by the upper punch cam that is arranged at the powder former bottom, prevent floating overhead cam and extrusion cam, utilize the external diameter height of each cam, on the length of low and peripheral circular arc and relative position change circular motion into by the transmission arm of number Zhi Butong, following motion, mat upper punch cam drives upper punch and does, the action of following motion also drives upper punch by the upper punch cam and does, the action of following motion and be to reach to finish by the concavo-convex pass of upper punch cam periphery, precompressed and compression motion in the following motion, when pressurization, longer because of being positioned at the stroke of bottom dead centre ST position, the aeriality that finished product is discharged is preferable, so the utlity model has the good advantage of quality of finished after steadily of centre of gravity and the moulding.

Be further to understand the architectural feature of aforementioned purpose and the utility model, attached now with graphic detailed description as the back:

(4) description of drawings

Fig. 1: the stereogram that is the powder former of the utility model.

Fig. 2: the front plan view that is the powder former of the utility model.

Fig. 3: be the utility model power transmission shaft and upper punch cam, prevent floating overhead cam and the plan view from above after the extrusion cam combines.

Fig. 4: be on the utility model towards the plane of cam behind contact upper punch transmission arm.

Fig. 5: be on the utility model towards the plan view from above of transmission arm.

Fig. 6: be the utility model prevent floating overhead cam plane behind the transmission arm on contact preventing is floating.

Fig. 7: the floating plan view from above that goes up transmission arm that prevents that is the utility model.

Fig. 8: the plane of extrusion cam behind contact extrusion transmission arm that is the utility model.

Fig. 9: the plan view from above that is the extrusion transmission arm of the utility model.

Figure 10: the curve map of powder former when moulding that is the utility model.

Figure 11: be the curve map of powder former when moulding of commonly using.

(5) specific embodiment

See also shown in Fig. 1,2,3, powder former pressue device of the present utility model comprises:

Be provided with a motor (10) in powder former, this motor (10) drives to a power transmission shaft (11) by drive mechanism and locates, and locates to be provided with in regular turn in power transmission shaft (11) to prevent to float overhead cam (20), upper punch cam (30) and extrusion cam (40).

As shown in Fig. 2,4,5, on powder former, correspond respectively to upper punch cam (30), prevent that floating overhead cam (20) and extrusion cam (40) from locating to be pivoted with upper punch transmission arm (32), to prevent floating transmission arm (22) and the extrusion transmission arm (42) gone up with a fulcrum (31), (21), (41) respectively;

One end of this upper punch transmission arm (32) is provided with a pedestal (33), this pedestal (33) is to be fixedly arranged on respectively on the elevating lever (34) that vertically is provided with in side, each elevating lever (34) is to extend up respectively and connect with an elevating bracket (35), below in elevating bracket (35) is connected with a upper punch (37) with other structures, protrude out down in upper punch (37) bottom center and to be provided with patrix (36), this patrix (36) but effect be usefulness for the tight metal dust of voltage supply;

Mould in one (50), Yu Zhongmo (50) inside is formed with die cavity, in die cavity, can place metal dust (as iron powder), metal dust can be extruded finished product down by patrix (36), Yu Zhongmo (50) bottom can interconnect by a connecting rod (51) and a decline plate (52), and court has a center pillar (53) that vertically is provided with in decline plate (52) bottom;

Once nest plate (54) is for maintaining static, dashing (55) once is can be fixedly arranged on the low punch plate (54), and (55) are dashed in this time is the die cavity bottom that is right against middle mould (50), and this time dashed (55) and can because of connecting rod (51) and decline plate (52) is drop-down finished product ejection up after the middle moulding of middle mould (50) be come out.

As shown in Fig. 6,7, in preventing that the floating end in addition of going up transmission arm (22) is provided with a seat board (23) that is fixedly arranged on the center pillar (53), when preventing that the floating transmission arm (22) of going up from when pressing down, being center pillar (53) can be pressed down in the lump.

Shown in Fig. 8,9, be provided with a flat board (43) in holding in addition of extrusion transmission arm (42), this flat board (43) is can set firmly with center pillar (53) to be one.

When using after the combination of said structure (as Fig. 2,4, shown in 5), when filling enters metal dust in middle mould (50), between patrix (36) and the middle mould (50) the proper spacing distance is arranged still, when the protuberance of upper punch cam (30) is pushed an end of upper punch transmission arm (22) and its other end is pressed down synchronously with elevating lever (34) and elevating bracket (35), and can make upper punch (37), patrix (36) also presses down, that is when pressurization, can make down start of patrix (36), also can make the bottom of patrix (36) press metal powder end in the die cavity of middle mould (50), the effect of upper punch cam (30) is to finish precompressed and compression motion.

When pressurization does not finish as yet (as shown in Fig. 2,6,7), can prevent to float an end of going up transmission arm (22) by preventing that floating overhead cam (20) from contacting and pressing on, order prevents that the floating end in addition of going up transmission arm (22) from pressing down, also can make center pillar (53) location prevent to float, but mat center pillar (53) is down with decline plate (52), low punch plate (54), connecting rod (51) and the drop-down suitable distance of middle mould (50) simultaneously, and can have suitable cushioning effect, and can make the time of moulding extend, make that the quality of finished after the moulding can be preferable in middle mould (50).

When moving back the operation of mould (as shown in Fig. 2,8,9), can press by extrusion cam (40) and touch to the effect of extrusion cam drive arm (42) one ends, making extrusion cam drive arm (42) hold with center pillar (53) in addition presses down synchronously, that is middle mould (50) is descended under the drive of center pillar (53) once again, mat dashes (55) down and by the bottom-up of middle mould (50) the finished product ejection is gone out, again finished product is taken off, can finish the operation sequence of moving back mould.

So of the present utility model focusing on: the relative driving cam structure of the motor in the utility model (10), it is the place, bottom that is arranged at powder former, has the comparatively firm advantage of center of gravity, and the bottom dead centre ST stroke in the utility model is grown (as shown in Figure 10), when pressurization, can make the venting quality of finished product preferable, also product can be difficult for forming the space in finished product inside after moulding, have the good advantage of quality of finished.

Therefore, via above explanation as can be known, the utility model can have at least as after advantage:

1. steadily of centre of gravity: the relative driving cam knot of the motor in the utility model (10) Structure is the place, bottom that is arranged at powder former, so have the comparatively firm advantage of center of gravity.

2. product quality is good: the bottom dead centre ST stroke in the utility model is longer, when pressurization, Can make the venting quality of finished product better, also product can be difficult for forming the space in finished product inside after moulding, Can reach the good advantage of quality of finished.

Claims

1. the pressue device of a powder former, it is characterized in that: include: be located at a motor of powder former bottom, this motor connects a power transmission shaft, is provided with in regular turn to prevent floating overhead cam, upper punch cam and extrusion cam on power transmission shaft;

On powder former corresponding to the upper punch cam, prevent floating overhead cam and extrusion cam place respectively with a fulcrum be pivoted the upper punch transmission arm, prevent floating on transmission arm and extrusion transmission arm;

2. the pressue device of powder former as claimed in claim 1 is characterized in that: it is the die cavity below of mould in being right against that this time dashed.