CN218948342U

CN218948342U - Mould structure of automatic broken stub bar in mould

Info

Publication number: CN218948342U
Application number: CN202222857621.4U
Authority: CN
Inventors: 陈俊名
Original assignee: Ningbo Henghe Precision Industry Co ltd
Current assignee: Ningbo Henghe Precision Industry Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-05-02
Anticipated expiration: 2032-10-28

Abstract

The utility model discloses a die structure of an automatic material cutting head in a die, which comprises a bottom plate, a fixed plate, a forming block arranged on the fixed plate, an ejection mechanism and a cutting mechanism, wherein the forming block is provided with a forming surface, the ejection mechanism comprises an ejector rod and a driving mechanism, the forming block is provided with a mounting hole in a penetrating way, the mounting hole is internally provided with a mounting sleeve in a embedding way, the mounting sleeve is provided with a through hole corresponding to a glue inlet, the ejector rod is arranged in the through hole in a penetrating way, and the driving mechanism drives the ejector rod to axially move along the through hole; the cutting mechanism comprises an annular cutter and a lifting structure, a gap is reserved between the ejector rod and the inner wall of the through hole, the annular cutter is movably arranged in the gap, and the lifting structure drives the annular cutter to axially move along the through hole. The utility model has the following advantages and effects: the new mechanical structure of this scheme utilization has the shaping article not fragile, reduce cost, promotes the quality, improves production efficiency's effect when the die sinking.

Description

Mould structure of automatic broken stub bar in mould

Technical Field

The utility model relates to the technical field of injection molds, in particular to a mold structure of an in-mold automatic material breaking head.

Background

Injection molding, also called injection molding, is a molding method of injection and molding, in which a plastic material which is completely melted is stirred by a screw at a certain temperature, injected into a mold cavity by high pressure, and cooled and solidified to obtain a molded product.

In particular, as shown in fig. 1, a hole 81 is required to be formed in the center of a motor cover 8, no welding line is required to be formed on the whole of the motor cover, no glue hole mark is required to be formed on the appearance of the motor cover, the existing mold is used for forming the hole through the mold itself, the mold stripping at two sides of the hole is difficult to cause damage in the follow-up process, and in addition, the glue inlet stub bar is required to be trimmed in the follow-up process due to the existence of the glue inlet stub bar, so that uneven trimming is inevitably caused, additional product trimming procedures are added, the production efficiency is reduced, and the appearance of the molded product is not attractive enough.

Disclosure of Invention

The utility model aims to provide a die structure of an automatic material breaking head in a die, which has the effects of preventing a formed product from being damaged during die opening, reducing cost, improving quality and improving production efficiency.

The technical aim of the utility model is realized by the following technical scheme: the die structure of the automatic material breaking head in the die comprises a bottom plate, a fixed plate and a forming block arranged on the fixed plate, wherein the forming block is provided with a forming surface, the die structure further comprises an ejection mechanism and a cutting mechanism, the ejection mechanism comprises an ejector rod and a driving structure, the forming block is provided with a mounting hole in a penetrating way, the mounting hole is internally embedded with a mounting sleeve, the mounting sleeve is provided with a through hole corresponding to a glue inlet, the ejector rod is arranged in the through hole in a penetrating way, and the driving structure drives the ejector rod to axially move along the through hole; the cutting mechanism comprises an annular cutter and a lifting structure, a gap is reserved between the ejector rod and the inner wall of the through hole, the annular cutter is movably arranged in the gap, and the lifting structure drives the annular cutter to axially move along the through hole.

Through adopting above-mentioned technical scheme, the through-hole is offered on the installation and is sheathe in, the outer wall of annular cutter and the through-hole inner wall sliding fit of installation cover, can effectively prevent the wearing and tearing that shaping piece and annular cutter direct contact lead to, the glue inlet is located directly over the through-hole in addition, before the beginning of moulding plastics, ejector pin and annular cutter shrink are located the through-hole, after the compound die is passed through this glue inlet to the intracavity injection moulding, after the shaping article is moulded plastics, ejector pin and annular cutter tip in through-hole position form the stub bar on shaping article surface, then drive annular cutter and upwards jack-up from the through-hole through elevating system, make annular cutter trompil to the shaping article, owing to the stub bar of glue inlet department corresponds the middle part that is located annular cutter, all stub bars of vertical direction are cut off together after the annular cutter trompil is accomplished, make shaping article surface no stub bar exist, drive ejector pin upwards through actuating mechanism after the die sinking, realize the separation of stub bar and shaping article, the shaping article is difficult fragile when having the die sinking, the cost is reduced, the promotion quality, the effect of production efficiency is improved.

The utility model is further provided with: the cutting edge part of the annular cutter is obliquely arranged at the end part of the annular cutter from inside to outside.

Through adopting above-mentioned technical scheme, blade portion is from interior to the tip of outer inclined seting up at annular cutter inner wall, makes annular cutter outer wall keep vertical parallel state, can make the hole site inner wall of annular cutter trompil straighter parallel and level.

The utility model is further provided with: the lifting structure comprises a top block assembly and a first oil cylinder arranged on the bottom plate, wherein the fixed plate is provided with a sliding groove communicated with the through hole, the sliding groove is movably provided with the top block assembly, one end of the top block assembly is connected with the annular cutter, the other end of the top block assembly is connected with a piston rod of the first oil cylinder, and the first oil cylinder drives the top block assembly to move up and down in the sliding groove.

Through adopting above-mentioned technical scheme, the kicking block subassembly activity is located the inslot that slides, before the beginning of moulding plastics, and the kicking block subassembly is kept away from the bottom of the groove that slides, after injection moulding accomplished, drives kicking block subassembly upward movement through first hydro-cylinder, makes annular cutter trompil the shaping article, until the kicking block subassembly supports the bottom surface in the groove that slides, and the trompil is accomplished.

The utility model is further provided with: a gap is reserved between the top block assembly and the bottom of the sliding groove, and the distance of the gap is at least the height of the opening position of the molded product.

The utility model is further provided with: the ejector rod penetrates through the through hole.

Through adopting above-mentioned technical scheme, the through-hole has played the effect of dodging to the ejector pin, when making the ejector block subassembly slide from top to bottom in the groove that slides, the ejector pin can not take place relative motion.

The utility model is further provided with: the top block assembly comprises a first top block and a second top block fixed on the first top block, a clamping protrusion is arranged at one end of the annular cutter, a stepped hole is formed in the second top block corresponding to the clamping protrusion, the annular cutter penetrates through the stepped hole, one end of the clamping protrusion is matched with the step Kong Didang, and the other end of the clamping protrusion is matched with the first top block stop.

Through adopting above-mentioned technical scheme, annular cutter one end is fixed in between second kicking block and the first kicking block through the card protruding, and this kind of fixed mode makes annular cutter dismantle and fixes on the kicking block subassembly, makes things convenient for follow-up to annular cutter's change.

The utility model is further provided with: the open end of the sliding groove is provided with a baffle, when the ejector block assembly moves to be close to the open end of the sliding groove, the baffle is matched with the first ejector block stop, and the baffle corresponds to the ejector rod and a piston rod of the first oil cylinder, and is provided with an avoidance hole.

Through adopting above-mentioned technical scheme, the baffle has carried out spacingly to the kicking block subassembly, and when first hydro-cylinder drove kicking block subassembly downstream, through the backstop effect between baffle and the first kicking block, has carried out spacing of decurrent to first kicking block, prevents that first hydro-cylinder from driving annular cutter excessive retraction to in the through-hole, and the sizing material flows into inside the through-hole when making injection molding, leads to follow-up annular cutter's ejecting difficulty, has reduced annular cutter's life.

The utility model is further provided with: the driving structure comprises a second top plate, a first top plate and a second oil cylinder, wherein a piston rod of the second oil cylinder is fixed on the first top plate, the second top plate is arranged on the first top plate and is in tight fit with the first top plate, one end of the ejector rod is provided with a stop part, the second top plate corresponds to the stop part, a stepped hole is formed in the stop part, the ejector rod penetrates through the stepped hole, one end of the stop part is matched with the step Kong Zhidang, and the other end of the stop part is matched with the stop of the first top plate.

Through adopting above-mentioned technical scheme, ejector pin one end demountable installation is on the second roof to through backstop portion and the cooperation of first roof backstop, make things convenient for follow-up dismantlement change to the ejector pin.

The utility model is further provided with: the ejector pin is arranged between the second top plate and the forming block, the forming block is provided with an ejection hole corresponding to the ejector pin, the ejection hole is communicated with the cavity, and the ejector pin is in sliding fit with the ejection hole.

Through adopting above-mentioned technical scheme, when the die sinking, the second roof is by the jack-up, drives the thimble and passes fixed plate and shaping piece in proper order and upwards slides in ejecting hole, has an ascending thrust to the shaping article, makes the shaping article be ejected by the thimble realize the drawing of patterns.

The utility model is further provided with: the installation sleeve is a wear-resistant metal sleeve.

Through adopting above-mentioned technical scheme, the installation cover is established to wear-resisting metal cover, can effectively improve the life of installation cover.

In summary, the utility model has the following beneficial effects: adopt the injecting glue mouth correspond the setting in the position that needs to punch, directly cut out the position that forms the hole site to the mouth of intaking through annular cutter before the shaping article demolding, then ejecting the stub bar through the ejector pin, realize the separation of stub bar and shaping article, saved the process of pruning the mouth stub bar of intaking, the shaping article is not fragile when having the demolding, long service life, reduce cost, promote the quality, improve production efficiency's effect.

Drawings

FIG. 1 is a block diagram of a molded article of the present utility model.

Fig. 2 is a structural diagram of the present utility model.

Fig. 3 is a longitudinal sectional view of the present utility model at the time of injection molding.

Fig. 4 is an enlarged view of a portion of the area a of fig. 3 in accordance with the present utility model.

Figure 5 is a longitudinal cross-sectional view of the present utility model at the completion of the cutting by the annular cutter.

Fig. 6 is an enlarged view of a portion of the area B of fig. 5 in accordance with the present utility model.

FIG. 7 is a longitudinal cross-sectional view of the ejection of the molded article and the stub bar of the present utility model.

In the figure: a. a gap; 1. a bottom plate; 2. a fixing plate; 21. a slip groove; 3. molding blocks; 30. molding surface; 31. a mounting hole; 32. an ejection hole; 41. a push rod; 411. a stop portion; 421. a second top plate; 4211. a step hole; 422. a first top plate; 423. a second cylinder; 51. an annular cutter; 511. a clamping protrusion; 521. a top block assembly; 5210. a through hole; 5211. a second top block; 52111. a stepped hole; 5212. a first top block; 522. a first cylinder; 6. a mounting sleeve; 61. a through hole; 7. a baffle; 71. avoidance holes; 8. a molded article; 81. hole sites; 9. and (5) a thimble.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

The utility model provides an automatic broken stub bar's mould structure in mould, as shown in fig. 1-3, including ejection mechanism, cutting mechanism, bottom plate 1, fixed plate 2, locate shaping piece 3 on the fixed plate 2, still include last moulded die (not shown), go up the moulded die and seted up into gluey mouth, shaping piece 3 is equipped with moulding face 30, ejection mechanism includes ejector pin 41 and drive structure, mounting hole 31 has been seted up to shaping piece 3 corresponding into gluey mouth, mounting hole 31 is embedded to be equipped with installation cover 6, through-hole 61 has been seted up to installation cover 6, the outer wall of annular cutter 51 and the inner wall sliding fit of through-hole 61, installation cover 6 is established to wear-resisting metal cover, be different from through-hole 61 and directly set up on shaping piece 3, can effectively prevent wearing and tearing that shaping piece 3 and annular cutter 51 direct contact lead to, can effectively improve the life of installation cover 6.

As shown in fig. 3-7, the ejector rod 41 is arranged in the through hole 61 in a penetrating manner, the driving structure drives the ejector rod 41 to axially move along the through hole 61, the cutting mechanism comprises an annular cutter 51 and a lifting structure, the lifting structure comprises an ejector block component 521 and a first oil cylinder 522 arranged on the bottom plate 1, the fixed plate 2 is provided with a sliding groove 21 communicated with the through hole 61, the ejector block component 521 is movably arranged in the sliding groove 21, one end of the ejector block component 521 is connected with the annular cutter 51, the other end of the ejector block component 521 is connected with a piston rod of the first oil cylinder 522, the first oil cylinder 522 drives the ejector block component 521 to vertically move in the sliding groove 21, a gap is reserved between the through hole 61 and the ejector rod 41, the annular cutter 51 is movably arranged in the gap, one end of the annular cutter 51 is fixed on the ejector block component 521, the annular cutter 51 is driven to vertically move to extend out or retract into the gap when the ejector block component 521 moves, the ejector rod 41 is arranged in the through hole 5210, the through hole 5210 is arranged in the sliding groove 5210 in a penetrating manner, the ejector rod 41 has a avoidance effect on the ejector rod 41, and the ejector rod 41 cannot relatively move vertically in the sliding groove 21; before injection molding starts, a gap a is reserved between the top block component 521 and the bottom of the sliding groove 21, the distance of the gap a is at least the height of a hole site 81 formed in one molded product 8, after injection molding is finished, the top block component 521 is driven to move upwards through the first oil cylinder 522, so that the annular cutter 51 opens the hole site 81 to the molded product 8 until the top block component 521 abuts against the bottom surface of the sliding groove 21, and the hole opening is finished.

As shown in fig. 4 and 6, the edge of the annular cutter 51 is obliquely opened from inside to outside at the end of the annular cutter 51, and the edge is obliquely opened from inside to outside at the end of the inner wall of the annular cutter 51, so that the outer wall of the annular cutter 51 is kept in a vertical parallel state, and the inner wall of the hole site of the opening of the annular cutter 51 can be straighter and more flush.

The top block assembly 521 includes a first top block 5212, and a second top block 5211 fixed to the first top block 5212, wherein a clamping protrusion 511 is provided at one end of the annular cutter 51, a stepped hole 52111 is provided at the second top block 5211 corresponding to the clamping protrusion 511, the annular cutter 51 is disposed through the stepped hole 52111, one end of the clamping protrusion 511 is in abutment fit with the stepped hole 52111, the other end of the clamping protrusion 511 is in abutment fit with the first top block 5212, and one end of the annular cutter 51 is fixed between the second top block 5211 and the first top block 5212 via the clamping protrusion 511.

The open end of the sliding groove 21 is provided with the baffle 7, when the ejector block assembly 521 moves to be close to the open end of the sliding groove 21, the baffle 7 is matched with the first ejector block 5212 in a stop mode, the baffle 7 is provided with the avoidance hole 71 corresponding to the ejector rod 41 and the piston rod of the first oil cylinder 522, the baffle 7 limits the ejector block assembly 521, when the first oil cylinder 522 drives the ejector block assembly 521 to move downwards, the baffle 7 and the first ejector block 5212 limit the first ejector block 5212 downwards through the stop function, the first oil cylinder 522 is prevented from driving the annular cutter 51 to retract into the through hole 61 excessively, glue flows into the through hole 61 during injection molding, ejection of the subsequent annular cutter 51 is difficult, and the service life of the annular cutter 51 is shortened.

As shown in fig. 3-7, the driving structure includes a second top plate 421, a first top plate 422, and a second oil cylinder 423, wherein a piston rod of the second oil cylinder 423 is fixed on the first top plate 422, the second top plate 421 is disposed on the first top plate 422 and is in tight fit with the first top plate 422, one end of the ejector rod 41 is provided with a stop portion 411, a step hole 4211 is formed in the second top plate 421 corresponding to the stop portion 411, the ejector rod 41 is arranged in the step hole 4211 in a penetrating manner, one end of the stop portion 411 is in stop fit with the step hole 4211, the other end of the stop portion 411 is in stop fit with the first top plate 422, and one end of the ejector rod 41 is detachably mounted on the second top plate 421 and is in stop fit with the first top plate 422 through the stop portion 411, so that the subsequent disassembly and replacement of the ejector rod 41 are facilitated; the ejector pins 9 are arranged between the second top plate and the forming block 3, the forming block 3 is provided with ejector holes 32 corresponding to the ejector pins 9, the ejector holes 32 are communicated with the cavity, the ejector pins 9 are in sliding fit with the ejector holes 32, when the die is opened, the second top plate is lifted upwards, the ejector pins 9 are driven to sequentially pass through the fixed plate 2 and the forming block 3 and slide upwards in the ejector holes 32, and an upward thrust is provided for the forming product 8, so that the forming product 8 is ejected by the ejector pins 9 to realize demolding.

The basic working principle of the utility model is as follows: the through hole 61 is arranged on the mounting sleeve 6, the outer wall of the annular cutter 51 is in sliding fit with the inner wall of the through hole 61 of the mounting sleeve 6, abrasion caused by direct contact between the forming block 3 and the annular cutter 51 can be effectively prevented, in addition, the glue inlet hole is formed right above the through hole 61, before injection molding starts, the ejector rod 41 and the annular cutter 51 are contracted to be positioned in the through hole 61, after mold closing, injection molding is performed to a cavity through the glue inlet hole, after injection molding of the forming product 8 is completed, the ejector rod 41 and the end part of the annular cutter 51 at the position of the through hole 61 form a stub bar on the surface of the forming product 8, then the annular cutter 51 is driven to jack up from the through hole 61 through a lifting mechanism, so that the annular cutter 51 is used for perforating the forming product 8, and all the stub bars in the vertical direction are cut off together, so that no stub bar exists on the surface of the forming product 8, after mold opening, the ejector rod 41 is driven to eject the stub bar upwards through a driving mechanism, so that separation of the stub bar and the forming product 8 is realized, and the effects of low cost, high quality and high production efficiency are achieved during mold opening are achieved.

The foregoing description is only of the preferred embodiments of the utility model, and all changes and modifications that come within the meaning and range of equivalency of the structures, features and principles of the utility model are therefore intended to be embraced therein.

Claims

1. The utility model provides an automatic broken stub bar's in mould structure, is including bottom plate (1), fixed plate (2), locate shaping piece (3) on fixed plate (2), shaping piece (3) are equipped with shaping face (30), its characterized in that:

the molding device comprises a molding block (3), and is characterized by further comprising an ejection mechanism and a cutting mechanism, wherein the ejection mechanism comprises an ejector rod (41) and a driving structure, a mounting hole (31) is formed in the molding block (3) in a penetrating mode, a mounting sleeve (6) is embedded in the mounting hole (31), a through hole (61) is formed in the mounting sleeve (6) corresponding to the glue inlet, the ejector rod (41) is arranged in the through hole (61) in a penetrating mode, and the driving structure drives the ejector rod (41) to axially move along the through hole (61);

the cutting mechanism comprises an annular cutter (51) and a lifting structure, a gap is reserved between the ejector rod (41) and the inner wall of the through hole (61), the annular cutter (51) is movably arranged in the gap, and the lifting structure drives the annular cutter (51) to axially move along the through hole (61).

2. The mold structure of an in-mold automatic blanking head according to claim 1, characterized in that: the cutting edge part of the annular cutter (51) is obliquely arranged at the end part of the annular cutter (51) from inside to outside.

3. The mold structure of an in-mold automatic blanking head according to claim 1, characterized in that: the lifting structure comprises a top block assembly (521) and a first oil cylinder (522) arranged on the bottom plate (1), wherein the fixed plate (2) is provided with a sliding groove (21) communicated with the through hole (61), the sliding groove (21) is movably provided with the top block assembly (521), one end of the top block assembly (521) is connected with the annular cutter (51), the other end of the top block assembly (521) is connected with a piston rod of the first oil cylinder (522), and the first oil cylinder (522) drives the top block assembly (521) to move up and down in the sliding groove (21).

4. A die structure for an in-die automatic blanking head as claimed in claim 3, wherein: a gap (a) is reserved between the top block assembly and the bottom of the sliding groove (21), and the distance of the gap (a) is at least the height of one forming product perforating position.

5. A die structure for an in-die automatic blanking head as claimed in claim 3, wherein: the ejector block assembly (521) is provided with a through hole (5210), and the ejector rod (41) is arranged in the through hole (5210) in a penetrating mode.

6. A die structure for an in-die automatic blanking head as claimed in claim 3, wherein: the top block assembly (521) comprises a first top block (5212) and a second top block (5211) fixed on the first top block (5212), a clamping protrusion (511) is arranged at one end of the annular cutter (51), a stepped hole (52111) is formed in the second top block (5211) corresponding to the clamping protrusion (511), the annular cutter (51) penetrates through the stepped hole (52111), one end of the clamping protrusion (511) is matched with the stepped hole (52111) in a blocking mode, and the other end of the clamping protrusion (511) is matched with the first top block (5212) in a blocking mode.

7. The mold structure of an in-mold automatic blanking head as claimed in claim 6, wherein: the open end of the sliding groove (21) is provided with a baffle (7), when the top block assembly (521) moves to be close to the open end of the sliding groove (21), the baffle (7) is matched with the first top block (5212) in a stop mode, and the baffle (7) corresponds to the ejector rod (41) and a piston rod of the first oil cylinder (522) to form an avoidance hole (71).

8. The mold structure of an in-mold automatic blanking head according to claim 1, characterized in that: the driving structure comprises a second top plate (421), a first top plate (422) and a second oil cylinder (423), a piston rod of the second oil cylinder (423) is fixed on the first top plate (422), the second top plate (421) is arranged on the first top plate (422) and in tight fit with the first top plate, a stop part (411) is arranged at one end of the ejector rod (41), a step hole (4211) is formed in the second top plate (421) corresponding to the stop part (411), the ejector rod (41) penetrates through the step hole (4211), one end of the stop part (411) is in stop fit with the step hole (4211), and the other end of the stop part (411) is in stop fit with the first top plate (422).

9. The mold structure of an in-mold automatic blanking head according to claim 8, characterized in that: the second top plate and the forming block (3) are provided with ejector pins (9), the forming block (3) is provided with ejection holes (32) corresponding to the ejector pins (9), the ejection holes (32) are communicated with the cavity, and the ejector pins (9) are in sliding fit with the ejection holes (32).

10. The mold structure of an in-mold automatic blanking head according to claim 1, characterized in that: the mounting sleeve (6) is a wear-resistant metal sleeve.