CN108015999A - Ejection mechanism for female die oblique pin - Google Patents

Abstract

The invention discloses an ejection mechanism for oblique pins of a female die. The ejector mechanism for oblique pins of a female die comprises: a blind ejector plate groove arranged on the front of the female die and the back of the female die; an ejector plate arranged in the blind ejector plate groove, There is an undercut allowance in the groove; the oblique pin seat is set on the ejector plate in the groove of the blind ejector plate; Inside the oblique pin seat; shutter B, including: rubber sleeve, set in the core of the male mold; adjusting screw, set in the core of the female mold; pull rod of ejector plate, set in the core of the female mold, one end is fixed in the groove of the blind ejector pin On the thimble plate, the other end is fastened with the adjusting screw. Utilizing the push-out mechanism of the inclined pin of the female die of the present invention facilitates the withdrawal of the oblique pin of the female die for reverse buckling, reduces the thickness of the die, shortens the length of the vertical runner, and saves the cost of die materials at the same time, meeting the actual production needs. .

Description

Master mold oblique pin ejection mechanism

【Technical field】

The invention relates to a tilting pin ejection mechanism, in particular to a tilting pin ejection mechanism of a mother mold.

【Background technique】

Injection molds are suitable for mass production of product parts with complex shapes. As the type and appearance of injection molding products become more and more complex and diversified, it is often necessary to produce products with undercut structures, especially when producing products with undercuts on the surface of the master mold. It needs a special mother mold oblique pin mechanism to form and demould it. In the traditional injection mold design, the back of the mother mold is hollowed out, and a fixed plate and two ejector plates are used for ejection. The oblique pin mechanism of the mother mold adopting the above structure is not only complex in structure, but also has a long vertical flow channel, high injection pressure and is not conducive to the pulling out of the product, and cannot meet the needs of actual production.

In view of this, it is necessary to develop a new type of oblique pin ejection mechanism for the female mold. When the oblique pin ejection mechanism of the female mold is produced, it can conveniently and quickly withdraw the undercut and reduce the mold Thickness, shortening the length of the vertical channel, which is beneficial to the pulling out of the channel, and at the same time saving the cost of mold materials to meet the needs of actual production.

【Content of invention】

Therefore, the object of the present invention is to provide a new type of inclined pin ejection mechanism for the mother die, which can conveniently and quickly withdraw the undercut and reduce the thickness of the mold when producing products with undercuts on the face of the mother die. , shorten the length of the vertical runner, which is conducive to the pull out of the runner, saves the cost of mold materials, and meets the needs of actual production.

In order to achieve the above object, the oblique pin ejection mechanism of the female mold of the present invention is applied in a mold, and the mold has a female template, a female mold core, a male template, a male mold core, an upper fixing plate, a stripping plate, and a shutter A. The tilt pin ejection mechanism of the master mold includes:

Blind thimble plate groove, set on the front of the mother mold and the back of the mother mold core;

The thimble plate is set in the slot of the blind thimble plate, and there is an undercut allowance in the slot;

The oblique pin seat is arranged on the ejector plate in the slot of the blind ejector plate;

The oblique pin of the female mold is arranged in the core of the female mold of the mould, and one end of the oblique pin of the female mold is movably arranged in the oblique pin seat;

A switch B, the switch B includes:

The rubber sleeve is set in the male mold core;

The adjustment screw is set in the core of the mother mold;

The thimble plate pull rod is arranged in the core of the female mold, one end is fixed on the thimble plate in the blind thimble groove, and the other end is fastened with the adjusting screw.

Optionally, there is one and only one ejector plate in the blind ejector plate groove.

Optionally, an auxiliary ejector element is provided on the back of the groove of the blind ejector plate.

Optionally, the auxiliary ejecting element is a spring.

Compared with the prior art, the tilt pin ejection mechanism structure of the female mold of the present invention can make the tilt pin of the female mold convenient and quickly withdraw from the undercut when producing products with undercuts on the surface of the female mold, and shorten the length of the vertical flow channel , which is conducive to the pulling out of the runner, and at the same time reduces the thickness of the mold, saves the cost of mold materials, and meets the needs of actual production.

【Description of drawings】

Figure 1 is a schematic diagram of a product with undercuts on the face of a master mold.

Fig. 2 is an overall schematic diagram of the push-out mechanism of the oblique pin of the master mold.

Fig. 3 is a partial schematic diagram of the clamping state of the oblique pin ejector mechanism of the mother mold.

Fig. 4 is a partial schematic diagram of the mold opening state of the oblique pin ejection mechanism of the mother mold.

【Detailed ways】

Please refer to FIG. 1 and FIG. 2 , wherein FIG. 1 shows a schematic diagram of the undercut product 10 of the female mold surface, and FIG. 2 shows an overall schematic diagram of the inclined pin ejection mechanism of the female mold.

The oblique pin ejection mechanism of the female mold of the present invention is applied in a mold, and the mold has a female template 101, a female mold core 103, a male template 102, a male mold core 104, an upper fixing plate 106, a stripping plate 105, an opening and closing Device A107, the tilt pin ejection mechanism of the master mold includes:

Blind thimble plate groove 301 is arranged on the front of the master template 101 and the back of the master mold core 103;

The thimble plate 302 is arranged in the blind thimble plate groove 301, and there is an undercut allowance in the groove;

The oblique pin seat 202 is arranged on the ejector plate 302 in the blind ejector plate groove 301;

The oblique pin 201 of the female mold is arranged in the female mold core 103 of the mould, and one end of the oblique pin 201 of the female mold is movably arranged in the oblique pin seat 202;

The switch B500, the switch B500 includes:

The rubber sleeve 503 is arranged in the male mold core 104;

The adjusting screw 502 is set in the female die core 103;

The ejector plate pull rod 501 is arranged in the female core 103 , one end is fixed on the ejector plate 302 in the blind ejector plate groove 301 , and the other end is fastened with the adjusting screw 502 .

Wherein, there is only one ejector plate 302 in the blind ejector plate groove 301 .

Wherein, an auxiliary ejector element 303 is provided on the back of the blind ejector plate groove 301 .

Wherein, the auxiliary ejecting element 303 is a spring.

Please refer to Fig. 3 and Fig. 4. Fig. 3 shows a partial schematic view of the clamping state of the oblique pin ejector mechanism of the female mold, and Fig. 4 shows a partial schematic diagram of the mold opening state of the oblique pin ejector mechanism of the female die.

During the mold opening process, the stripping plate 105 is separated from the female template 101, and after the upper fixing plate is separated from the stripping plate 105, the male and female templates are opened. The master template 101, the master mold core 103 and the master mold oblique pin 201 are opened upwards, and the positioning rod and the rubber sleeve in the shutter A are pulled upward accordingly. During the mold opening process, the ejector plate 302 in the blind ejector plate groove 301 Because the margin set by the shutter B500 has not been completed, it remains motionless under the action of the ejector plate pull rod. When the female die slant pin 201 upwards mold opening, because the slant pin seat on the positioning plate 302 does not move, it moves inward along the groove in the slant pin seat 202. The master template 101, the master mold core 103 and the master mold slanting pin 201 continue to open the mold upward, the margin in the blind ejector plate groove 301 will become smaller and smaller, and the stroke of the master mold slanting pin 201 along the slanting pin seat 202 groove will become smaller and smaller. The smaller the size, the auxiliary ejector element 303 will also pop up due to the increasing margin on the back of the ejector pin plate 302, and the auxiliary ejector plate 302 will apply auxiliary pressure downward. When the mother mold core 103, the master template 101 and the mother mold oblique pin 201 are opened upwards to complete the allowance in the blind ejector plate groove 301, the stroke of the master mold oblique pin 201 in the oblique pin seat 202 groove ends, and the mother mold is completed. Die skew pin 201 withdraws from product 10 undercut surface 11 action. The auxiliary ejector element 303 is also fully stretched out, and the margin provided by the shutter B500 is also completed. At this time, the ejector plate 302 and the female core 103 are closely abutted against each other. The mother template 101, the female mold core 103 and the female mold oblique pin 201 continue to open the mold. At this time, the setting margin of the shutter B500 is completed, and the mold opening is continued to drive the ejector plate 302 in the blind ejector plate groove 301 to open the mold upward. Because the ejector plate pull rod 501 of the shutter B500 is fixed on the ejector plate 302, the mold is opened upwards to disengage the rubber sleeve 503 of the shutter B500 from the adjusting screw 502. So far, the mold opening action of the oblique pin ejection mechanism of the female mold is completed. When the rubber sleeve of the shutter A107 in the female template 101 is separated from the adjusting screw, the male template 102 is separated from the female template 101, and the male mold core 104 is separated from the female template 101. The mold core 103 completes the separation. When the product 10 is separated to the preset value, the product 10 will be ejected by the mold ejection system to complete the entire mold opening and the product 10 ejection action.

When the mold is closed, the ejection system of the product 10 returns first, and the male and female templates are closed. When the master template 101 and the master mold core 103 return downward, the ejector plate 302 in the blind ejector plate groove 301 does not move back, and the corresponding oblique pin 201 and oblique pin seat 202 of the female mold do not move either. When the master template 101 and the master mold core 103 continue to return, the rubber sleeve 503 of the shutter B500 merges with the adjustment nut and reaches the set value. At this time, the ejector plate rod 501 will push the ejector plate 302 to the blind ejector plate slot 301, and return the auxiliary ejector element 303 to its position. After the ejector plate pull rod 501 ejects the ejector plate 302, the female mold inclined pin 201 will move outwards along the inclined pin seat 202 groove under the combined action force of the male die core 104, and return to the undercut surface 11 of the product 10. At this moment, the push-out mechanism of the oblique pin of the mother die completes the return action. When the rubber sleeve in the shutter A107 and the adjustment screw allowance are gone and completely merged, the female template 101 and the male template 102 are closed, and the female mold core 103 and the male mold core 104 are closed. Then the stripping plate 105 merges with the master template 101, the upper fixing plate 106 merges with the stripping plate 105, and the mold is completely closed. After the mold closes, it waits for the injection molding machine to inject and start the next cycle.

To sum up, the oblique pin ejection mechanism of the female mold of the present invention processes a blind ejector plate groove 301 on the back of the female mold core 103, and only one ejector plate 302 is made in the groove. The oblique pin seat 202 is fixed on the needle fixed plate 302, and one end of the oblique pin 201 of the matrix moves in the slot of the oblique pin seat 202. Assemble a shutter B500, drive the ejector plate 302 to move downward through the shutter B500 and the pull rod, and set an auxiliary ejector element 303 in the blind ejector plate groove 301 to assist the ejector plate 302 to eject, when the ejector plate 302 hits the female Moren 103, stop motion. Continue to open the mold, and the oblique pin 201 of the female mold is withdrawn from the undercut surface 11 of the product along the groove of the oblique pin seat 202. This structure makes the oblique pin 201 of the mother mold convenient and quick to withdraw from the undercut, shortens the length of the vertical flow channel, facilitates the flow channel to be pulled out, and at the same time reduces the thickness of the mold, saves the cost of mold materials, and meets the needs of actual production.

Claims (4)

1. a kind of ejection mechanism for female die oblique pin, applied in mould, the mould has caster, mother module core, male template, male model Benevolence, upper mounted plate, stripper plate, shutter A is it is characterized in that, the ejection mechanism for female die oblique pin includes：

Blind thimble board slot, is arranged at caster front, the mother module core back side；

Ejector retainner plate, is arranged in blind thimble board slot, is left in groove and exit back-off surplus；

Oblique pin base, is arranged on the ejector retainner plate in blind thimble board slot；

Mother plate inclined pin, is arranged in the mother module core of mould, and one end of the mother plate inclined pin is movably arranged in oblique pin base；

Shutter B, the shutter B include：

Gum cover, is arranged in male die core；

Adjusting screw, is arranged in mother module core；

Ejector retainner plate pull rod, is arranged in mother module core, and one end is fixed on the ejector retainner plate in blind thimble groove, the other end and adjusting screw Fastening.

2. ejection mechanism for female die oblique pin according to claim 1, it is characterised in that have in the blind thimble board slot and only There is an ejector retainner plate.

3. ejection mechanism for female die oblique pin according to claim 1, it is characterised in that the blind thimble board slot back side is equipped with One auxiliary ejection element.

4. ejection mechanism for female die oblique pin according to claim 3, it is characterised in that the auxiliary ejection element is a bullet Spring.