CN210911005U

CN210911005U - Combined core-pulling mechanism and combined core-pulling die

Info

Publication number: CN210911005U
Application number: CN201921749035.XU
Authority: CN
Inventors: 陈武展; 王宇; 禹琰
Original assignee: Aux Air Conditioning Co Ltd; Ningbo Aux Electric Co Ltd
Current assignee: Aux Air Conditioning Co Ltd; Ningbo Aux Electric Co Ltd
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-07-03
Anticipated expiration: 2029-10-17

Abstract

The utility model provides a modular mechanism of loosing core and modular loose core mould relates to mould technical field, and this modular mechanism of loosing core includes cover half mould benevolence, movable mould benevolence, slider, elasticity loose core mold insert, leads piece and guide pillar to one side, and the cover half is merciful and peaceful movable mould benevolence sets up relatively, and the slider slides and sets up on movable mould benevolence, leads the piece setting to one side and is used for supporting on cover half mould benevolence and hold on the slider, the guide pillar setting is led to one side and is stretched out towards the direction that is close to movable mould benevolence on leading the piece to one side, has seted up the through-hole of loosing core. Compared with the prior art, the utility model provides a modular mechanism of loosing core, the action of loosing core is gone on simultaneously with the die sinking action to having reduced the cycle of moulding plastics, having utilized elasticity to loose core mold insert and die sinking power to replace the hydro-cylinder and accomplish the drawing of patterns motion of loosing core, and having got rid of the oblique structure of pushing up, avoided in the production because of the not enough risk that produces the collision that resets, improved the security of the process of moulding plastics greatly.

Description

Combined core-pulling mechanism and combined core-pulling die

Technical Field

The utility model relates to the technical field of molds, particularly, relate to a modular mechanism of loosing core and modular mould of loosing core.

Background

The existing end part of a product, such as an end part molding structure of a decorative strip, is generally powered by an oil cylinder, and the product is ejected by an inclined ejector. In addition, in the prior art, the oil cylinder moves firstly, then the mould opening movement is carried out, and the whole injection molding period is long.

In view of this, it is important to design and manufacture a safe and reliable combined core-pulling mechanism with a short injection molding cycle and capable of avoiding the risk of collision of components.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem how to reduce the cycle of moulding plastics, and how to avoid each part to collide, safe and reliable.

In order to solve the problem, the utility model adopts the following technical scheme to realize.

In one aspect, the utility model provides a modular mechanism of loosing core, including cover half benevolence, movable mould benevolence, slider, elasticity loose core mold insert, guide block and oblique guide pillar to one side, the cover half is benevolence and movable mould benevolence sets up relatively, and the slider slides and sets up on movable mould benevolence, and the guide block setting is used for supporting to hold on the slider to one side, and the guide pillar setting is stretched out towards the direction that is close to movable mould benevolence on the guide block to one side for stretch into the slider and promote the slider to slide, has seted up the through-hole of loosing core on the slider, and elasticity loose core mold insert activity sets up in the through-hole of loosing core, and elasticity loose core mold insert is used for stretching out the lower tip of the through-hole of loosing core under supporting of guide block to.

The utility model provides a modular mechanism of loosing core, utilize the die sinking power to promote the slider to slide when the die sinking through oblique guide arm, and the guide block supports when the compound die to one side and holds on the slider, and support and hold on the mold insert is loosed to elasticity, make elasticity loose core the mold insert and stretch out the lower tip of the through-hole of loosing core, thereby accomplish the shaping structure of product, the guide block breaks away from the slider to one side when the die sinking, the guide block is relieved to one side and is held supporting of the mold insert is loosed to elasticity, elasticity is loosed core the mold insert and is retracted the lower tip of the through-hole of loosing core under the effect of self elasticity, thereby accomplish the action of loosing core. Compared with the prior art, the utility model provides a modular mechanism of loosing core, the action of loosing core is gone on simultaneously with the die sinking action, need not earlier through the hydro-cylinder motion to having reduced the cycle of moulding plastics, in addition, utilize elasticity to loose core mold insert and die sinking power to replace the hydro-cylinder and accomplish the drawing of patterns of loosing core motion, and got rid of the oblique structure, and elasticity is loosed core mold insert and oblique ejector pin and can not take place to interfere, has avoided producing the risk of collision because of not enough restoring to the throne in the production, has improved the security of the process of moulding plastics greatly.

Furthermore, the elastic core-pulling insert comprises a core-pulling rod and an elastic piece, the core-pulling rod is accommodated in the core-pulling through hole in a sliding mode and used for abutting against the inclined guide block, and the elastic piece is arranged between the core-pulling rod and the sliding block and used for pushing the core-pulling rod to slide towards the inclined guide block and enabling the core-pulling rod to retract into the lower end portion of the core-pulling through hole.

The utility model provides a pair of modular mechanism of loosing core, promote the core pulling rod motion through the elastic component, make when removing to holding of core pulling rod to the guide block to one side, the core pulling rod can independently retract the lower tip of loosing core the through-hole of loosing core, and then make the core pulling rod break away from product shaping structure, accomplish the action of loosing core, can give the realization action of loosing core in the die sinking, the cycle of moulding plastics has been shortened, and the lower tip of core pulling rod stretches out the through-hole of loosing core and can accomplish the shaping structure of product under support of guide block to one side, the shaping process is simple and easy, the phenomenon of the dead collision of card can not take place, safety and reliability.

Furthermore, the middle part of the core pulling rod is provided with a baffle ring, one end of the elastic piece is connected with the baffle ring, the other end of the elastic piece is connected with the sliding block, and the sliding block is further provided with a core pulling stop block for stopping the baffle ring from dropping out of the core pulling through hole.

The utility model provides a pair of modular mechanism of loosing core through setting up the dog of loosing core to the backstop effect of structure fender ring can prevent to pop out the core pulling through-hole excessively under the spring action of elastic component with the core pulling rod, and the guide block can't support when avoiding the compound die once more and hold the core pulling rod.

Furthermore, the loose core stop block is covered at the end part of the loose core through hole and is provided with an opening for the end part of the core pulling rod to extend out, and the loose core stop block is detachably fixed on the sliding block through a bolt.

The utility model provides a pair of modular mechanism of loosing core passes through the bolt fastening through the dog of loosing core on the slider, when the elastic component needs to be changed, only needs to pull down the bolt on the dog of loosing core, but the dog of loosing core takes off can quick replacement, and is very convenient, and high efficiency.

Furthermore, an inclined guide hole for the inclined guide pillar to extend into is formed in the sliding block, and the inner diameter of the inclined guide hole is larger than the diameter of the inclined guide pillar, so that the inclined guide pillar is in clearance fit in the inclined guide hole.

The utility model provides a modular mechanism of loosing core, guide pillar clearance fit to one side is in guide hole to one side for guide pillar can promote the slider motion a little lagging to one side to guide block when the die sinking motion, reduces the slider motion and looses core the influence that the action of loosing core brought for elasticity of mold insert, reduces the dead probability of card, thereby is favorable to elasticity to loose core the mold insert and accomplishes the action of loosing core.

Further, the length T of the elastic core-pulling insert extending downwards out of the core-pulling through hole and the width X of the gap between the inclined guide post and the inner wall of the inclined guide hole satisfy the following formula:

T×sin(m)×sin(a)≤X；

wherein m is the included angle between the extending direction of the elastic core-pulling insert and the horizontal direction, and a is the included angle between the extending direction of the inclined guide post and the vertical direction.

The utility model provides a combination formula mechanism of loosing core is injectd through the clearance width between the inner wall of loosing core the mold insert to elasticity stretch out the length of loosing core the through-hole and oblique guide pillar and oblique guide hole for when the die sinking, at first elasticity is loosed core the mold insert and is demolded, and elasticity is loosed core the mold insert and is withdrawn behind the through-hole of loosing core, and oblique guide pillar supports just to hold on the inner wall of oblique guide hole, thereby promotes the slider and removes, forms the delayed demoulding, can reduce elasticity and loose core the mold insert and produce the damage to fashioned product.

(T+Q)×sin(m)×sin(a)≤X；

wherein m is the included angle between the extending direction of the elastic core-pulling insert and the horizontal direction, a is the included angle between the extending direction of the inclined guide pillar and the vertical direction, and Q is a safety margin.

The utility model provides a combination formula mechanism of loosing core through the settlement of above-mentioned formula for elasticity is loosed core the mold insert and is moving T individual distance after, and Q individual distance of removining ensures behind the afterbody of elasticity is loosed core the mold insert and breaks away from fashioned product completely, makes the guide pillar to one side promote the slider and slides again, when further preventing not completely separate, when the slider slides, causes elasticity to loose core mold insert scratch shaping product because of the contact.

Furthermore, a guide sliding groove is formed in the movable die core, the sliding block is arranged in the guide sliding groove in a sliding mode, and pressing strips are arranged on two sides of the guide sliding groove and used for being abutted to the sliding block in a sliding mode and limiting the sliding block in the vertical direction.

The utility model provides a combination formula mechanism of loosing core sets up the layering through the both sides at the spout of leading for the slider can only slide along the extending direction of layering, and can avoid the slider to break away from spout, safe and reliable.

Furthermore, the bottom of the guide sliding groove is also provided with a wear-resistant block, the sliding block is arranged on the wear-resistant block in a sliding mode, the wear-resistant block is provided with an elastic fixed block, the bottom of the sliding block is provided with a first clamping groove and a second clamping groove at intervals, and the elastic fixed block is used for being clamped in the second clamping groove after die opening and being clamped in the first clamping groove after die closing.

The utility model provides a modular mechanism of loosing core through set up the elastic fixation piece on wear-resisting piece, fixes the slider through second draw-in groove and first draw-in groove respectively after die sinking and compound die are accomplished to the slider removes in the certain limit, and when the guide pillar resets downwards to one side, can stretch into the slider smoothly, avoids causing the compound die difficulty because not in place resets.

In another aspect, the utility model provides a modular loose core mould, including the modular mechanism of loosing core, the modular mechanism of loosing core includes cover half mould benevolence, movable mould benevolence, slider, elasticity loose core mold insert, guide block and oblique guide pillar to one side, and the cover half is merciful and peaceful relative setting of movable mould benevolence, and the slider slides and sets up on movable mould benevolence, and guide block setting is used for supporting to one side on the cover half mould benevolence and is held on the slider, and the oblique guide pillar setting is stretched out towards the direction that is close to movable mould benevolence on the oblique guide block for stretch into the slider and promote the slider and slide, seted up the through-hole of loosing core on the slider, elasticity loose core mold insert activity sets up in the through-hole of loosing core, and elasticity loose core mold insert is used for stretching out the lower tip.

The utility model provides a modular loose core mould through setting up the elasticity mold insert of loosing core for the action of loosing core is gone on simultaneously with the die sinking action, need not earlier through the hydro-cylinder motion, thereby has reduced the cycle of moulding plastics, in addition, utilizes elasticity to loose core mold insert and die sinking power to replace the hydro-cylinder and accomplish the drawing of patterns of loosing core motion, and has got rid of the oblique structure, and elasticity is loosed core the mold insert and can not take place to interfere with oblique ejector pin, has avoided producing the risk of collision because of not enough restoring to the throne in the production, has improved the security of production process greatly.

Drawings

Fig. 1 is a schematic view of an overall structure of a combined core-pulling mechanism according to a first embodiment of the present invention;

FIG. 2 is a schematic view of a connecting structure of the cavity insert of FIG. 1;

FIG. 3 is a schematic view of a connecting structure of the cavity in FIG. 1;

fig. 4 is a schematic view of a partially exploded structure of a combined core-pulling mechanism according to a first embodiment of the present invention;

fig. 5 is a schematic view of a partial connection structure of a combined core-pulling mechanism according to a first embodiment of the present invention;

FIG. 6 is a schematic view of a connection structure between the slanted ejecting block and the slanted guide post in FIG. 5;

fig. 7 is a partial sectional view of the combined core-pulling mechanism according to the first embodiment of the present invention;

FIG. 8 is a cross-sectional view of the attachment structure of the slider of FIG. 7;

FIG. 9 is an enlarged partial view of IX in FIG. 8;

FIG. 10 is an enlarged partial view of X in FIG. 8;

FIG. 11 is a schematic view of the mounting structure of the slider of FIG. 1;

fig. 12 is a schematic view of a bottom connection structure of the slider in fig. 1.

Description of reference numerals:

100-a combined core-pulling mechanism; 110-fixing the mold core; 130-moving die core; 131-a guide chute; 133-pressing strips; 135-wear resistant block; 137-elastic fixed block; 150-a slider; 151-core pulling through holes; 153-oblique guide holes; 155-wear plate; 157-a first card slot; 159 — a second card slot; 170-elastic core-pulling inserts; 171-core pulling rod; 173-an elastic member; 175-a stop ring; 177-core pulling stop blocks; 180-inclined guide block; 181-holding the groove; 190-oblique guide post.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

First embodiment

Referring to fig. 1 to 3 in combination, the embodiment provides a combined core-pulling mechanism 100, which utilizes the mold opening force during mold opening and the elasticity of the core-pulling insert to provide power, replaces the original cylinder, and performs core pulling and mold opening simultaneously without moving through the cylinder first, thereby reducing the injection molding cycle. In addition, need not to set up the oblique top mechanism, avoided the not enough risk that produces the collision that resets of oblique top mechanism, improved the security of the in-process of moulding plastics greatly.

The combined core pulling mechanism 100 provided in this embodiment includes a core fixing module 110, a movable module core 130, a slider 150, an elastic core pulling insert 170, an inclined guide block 180 and an inclined guide post 190, wherein the core fixing module core 110 and the movable module core 130 are disposed oppositely, the slider 150 is slidably disposed on the movable module core 130, the inclined guide block 180 is disposed on the core fixing module core 110 and is used for abutting against the slider 150, the inclined guide post 190 is disposed on the inclined guide block 180 and extends out toward a direction close to the movable module core 130 and is used for extending into the slider 150 and pushing the slider 150 to slide, a core pulling through hole 151 is disposed on the slider 150, the elastic core pulling insert 170 is movably disposed in the core pulling through hole 151, and the elastic core pulling insert 170 is used for extending out a lower end of the core pulling through hole 151 under the abutting of the inclined guide block 180 and retracting into the lower end of the core pulling through.

In this embodiment, the core insert 110 is relatively disposed above the core insert 130, a plurality of inclined guide blocks 180 are disposed on the core insert 110, each inclined guide block 180 is provided with an inclined guide pillar 190, the core insert 130 is provided with a plurality of sliders 150, each slider 150 is provided with an elastic core-pulling insert 170 therein, and a plurality of end portions of a product or end portions of a plurality of products can be simultaneously injection-molded. When the mold is opened, the movable mold core 130 moves vertically downwards, the slide block 150 slides backwards relative to the movable mold core 130 under the pushing of the inclined guide post 190, and the elastic core-pulling insert 170 retracts into the lower end part of the core-pulling through hole 151 under the action of self elasticity, so that the actions of demolding and core-pulling are respectively realized; during mold closing, the movable mold core 130 moves vertically upwards, the slide block 150 slides forwards relative to the movable mold core 130 under the pushing of the inclined guide post 190, and the inclined guide block 180 is close to the slide block 150 and abuts against the elastic core-pulling insert 170, so that the elastic core-pulling insert 170 overcomes the elasticity of the elastic core-pulling insert and extends downwards out of the lower end part of the core-pulling through hole 151, and a forming structure of a product is completed, specifically, the elastic core-pulling insert 170 extends out of the lower end part of the core-pulling through hole 151 to form a through hole on the.

It should be noted that, a mounting hole is formed on the inclined guide block 180, the inclined guide post 190 is fixedly matched with the inclined guide block 180 through the mounting hole, the inclined guide block 180 is fixed on the cavity block 110 through a screw, the inclined guide post 190 is obliquely and downwardly arranged and extends towards the rear, and the elastic core-pulling insert 170 is movably arranged in the core-pulling through hole 151 and is obliquely arranged from top to bottom towards the front. It should be noted that the front direction refers to a direction in which the slider 150 approaches the product forming structure, i.e., a moving direction of the slider 150 during mold closing, and the rear direction refers to a direction in which the slider 150 moves away from the product forming structure, i.e., a moving direction of the slider 150 during mold opening.

The utility model provides a combination formula mechanism 100 of loosing core, utilize die sinking force to promote slider 150 to slide when the die sinking through oblique guide arm, and guide block 180 supports when the compound die to one side and holds on slider 150, and support and hold on elasticity core pulling insert 170, make elasticity core pulling insert 170 stretch out the lower tip of loosing core through-hole 151, thereby accomplish the shaping structure of product, guide block 180 breaks away from slider 150 to one side when the die sinking, guide block 180 removes to support of elasticity core pulling insert 170 to one side, elasticity core pulling insert 170 is the lower tip of indentation core pulling through-hole 151 under the effect of self elasticity, thereby accomplish the action of loosing core, slider 150 slides under the promotion of oblique guide arm, thereby accomplish the drawing of patterns action.

Referring to fig. 4 to 12, the elastic core-pulling insert 170 includes a core-pulling rod 171 and an elastic member 173, the core-pulling rod 171 is slidably received in the core-pulling through hole 151 and is configured to abut against the inclined guide block 180, and the elastic member 173 is disposed between the core-pulling rod 171 and the slider 150 and is configured to push the core-pulling rod 171 to slide toward the inclined guide block 180 and to retract the core-pulling rod 171 into the lower end portion of the core-pulling through hole 151. The core pulling rod 171 is pushed to move through the elastic piece 173, so that when the inclined guide block 180 releases the abutting of the core pulling rod 171, the core pulling rod 171 can retract into the lower end of the core pulling through hole 151 independently, and further the core pulling rod 171 is separated from a product forming structure, core pulling action is completed, core pulling action can be realized while the mold is opened, the injection molding period is shortened, the lower end of the core pulling rod 171 extends out of the core pulling through hole 151 under the abutting of the inclined guide block 180 and can complete the forming structure of a product, the forming process is simple and smooth, the phenomenon of blocking collision cannot occur, and the injection molding device is safe and reliable.

In this embodiment, a blocking ring 175 is disposed in the middle of the core pulling rod 171, one end of the elastic member 173 is connected to the blocking ring 175, the other end of the elastic member 173 is connected to the sliding block 150, and a core pulling stopper 177 is further disposed on the sliding block 150 for preventing the blocking ring 175 from coming off the core pulling through hole 151. Specifically, the stopper ring 175 is integrally provided at the middle portion of the plunger rod 171. By arranging the loose core stopper 177 and the stopping effect of the structure retaining ring 175, the loose core rod 171 can be prevented from being excessively ejected out of the loose core through hole 151 under the elastic action of the elastic piece 173, and the oblique guide block 180 can not abut against the loose core rod 171 when the mold is closed again.

In this embodiment, the elastic member 173 is a spring, and the spring is sleeved on the core pulling blocking rod, and one end of the spring is connected to the blocking ring 175, and the other end of the spring abuts against the inner wall of the core pulling through hole 151, so that the lower portion of the spring is kept in an abutting state, and the upper portion of the spring is in a compressed state, and when the inclined guide block 180 releases the abutting against the core pulling rod 171, the core pulling rod 171 can be pushed upwards.

In this embodiment, the annular boss is disposed inside the core-pulling through hole 151 to achieve the abutting effect of the lower portion of the spring.

In this embodiment, the core back stopper 177 covers an end portion of the core back through hole 151 and is provided with an opening through which an end portion of the core back rod 171 protrudes, and the core back stopper 177 is detachably fixed to the slider 150 by a bolt. Specifically, the upper surface of the loose core stopper 177 is flush with the upper surface of the slider 150, so that the inclined guide block 180 can be stressed uniformly when being pressed on the slider 150, meanwhile, the size of the opening of the loose core stopper 177 is smaller than the size of the upper part of the loose core through hole 151, so that when the loose core stopper 177 is installed in place, only the core rod 171 can extend out of the opening, the baffle ring 175 cannot extend out, and when the loose core stopper 177 is detached, the core rod 171 and the spring can be taken out of the loose core opening together. With the dog 177 through the bolt fastening on slider 150, when the elastic component 173 was changed to needs, only need pull down the bolt on the dog 177, can quick replacement, very convenient, and high efficiency takes off the dog 177.

In this embodiment, the lower surface of the inclined guide block 180 is further provided with a supporting groove 181, when the inclined guide block 180 is pressed on the slider 150, an inner wall of the supporting groove 181 supports against the upper end portion of the core pulling rod 171, and the surface of the supported inner wall is perpendicular to the extending direction of the core pulling rod 171, so that the core pulling rod 171 is axially stressed, and the core pulling rod 171 is prevented from being greatly deviated to influence the movement in the core pulling through hole 151.

The slider 150 is provided with an inclined guide hole 153 for the inclined guide post 190 to extend into, and the inner diameter of the inclined guide hole 153 is larger than the diameter of the inclined guide post 190, so that the inclined guide post 190 is in clearance fit in the inclined guide hole 153. The inclined guide post 190 is in clearance fit with the inclined guide hole 153, so that the inclined guide post 190 can delay to push the sliding block 150 to move when the mold opening of the inclined guide block 180 is moved, the influence of the movement of the sliding block 150 on the core pulling action of the elastic core pulling insert 170 is reduced, the blocking probability is reduced, and the core pulling action of the elastic core pulling insert 170 is facilitated.

Specifically, the length T of the elastic core-pulling insert 170 extending out of the core-pulling through hole 151 and the gap width X between the inclined guide pillar 190 and the inner wall of the inclined guide hole 153 satisfy the following formula:

(T+Q)×sin(m)×sin(a)≤X；

wherein m is an included angle between the extending direction of the elastic core pulling insert 170 and the horizontal direction, and a is an included angle between the extending direction of the inclined guide post 190 and the vertical direction. Through the setting of the above formula, the elastic core-pulling insert 170 moves for Q distances after moving for T distances, and after the tail of the elastic core-pulling insert 170 is completely separated from the molded product, the inclined guide post 190 pushes the slider 150 to slide, so as to further prevent the elastic core-pulling insert 170 from scratching the molded product due to contact when the slider 150 slides without complete separation.

In the present embodiment, the distances are all in mm. In this embodiment, Q is 0.02mm, and by setting a safety margin of 0.02mm, the plunger rod 171 moves for T distances and then moves for 0.02mm, and then the inclined guide rod pushes the slider 150 to slide, so as to ensure that the tail of the plunger rod 171 is completely separated from the circular hole formed in the product. Of course, the safety margin Q may be other values, such as 0.01mm or 0.03mm, and the value of the safety margin Q in this embodiment is in the range of 0-0.05 mm.

It should be noted that, in this embodiment, after the plunger rod 171 moves for T + Q distances, the core back stopper 177 just abuts against the stop ring 175, so that the plunger rod 171 stops moving.

Of course, in other preferred embodiments, when the desired manufacturing accuracy is achieved, there may be no safety margin, that is, the length T of the elastic core-pulling insert 170 extending downward out of the core-pulling through hole 151 and the gap width X between the inclined guide post 190 and the inner wall of the inclined guide hole 153 satisfy the following formula:

T×sin(m)×sin(a)≤X；

at this point, the slide 150 begins to slide just after the plunger rod 171 is disengaged from the product.

In this embodiment, the movable mold core 130 is provided with a sliding guide slot 131, the sliding block 150 is slidably disposed in the sliding guide slot 131, and two sides of the sliding guide slot 131 are provided with pressing strips 133 for slidably abutting against the sliding block 150 and limiting the sliding block 150 in the vertical direction. Specifically, the pressing bar 133 is fixed on the movable mold core 130 by screws, and the pressing bar 133 is disposed on two sides of the sliding guide groove 131, so that the slider 150 can only slide along the extending direction of the pressing bar 133, and the slider 150 can be prevented from being separated from the sliding guide groove 131, which is safe and reliable.

In this embodiment, the two sides of the bottom of the slider 150 further have convex edge structures, and the convex edge structures extend to the lower side of the pressing strip 133, so that the slider 150 can be limited on the movable die core 130 in the vertical direction by the pressing strip 133, and the slider 150 can only move along the extending direction of the pressing strip 133.

The bottom of the slide guide groove 131 is further provided with a wear-resistant block 135, the slider 150 is slidably arranged on the wear-resistant block 135, an elastic fixed block 137 is arranged on the wear-resistant block 135, the bottom of the slider 150 is provided with a first clamping groove 157 and a second clamping groove 159 at intervals, and the elastic fixed block 137 is used for being clamped in the second clamping groove 159 after mold opening and being clamped in the first clamping groove 157 after mold closing. Specifically, the wear-resistant block 135 is flush with the bottom wall of the sliding guide groove 131, and is fixed on the movable die core 130 by a screw, and the wear-resistant block 135 is provided with an accommodating groove, the elastic fixing block 137 is arranged in the accommodating groove and protrudes upward, in the sliding process of the slider 150, the elastic fixing block 137 is extruded to be flush with the surface of the wear-resistant block 135, so as to prevent the elastic fixing block 137 from influencing the movement of the slider 150, when the slider 150 moves in place, that is, after the die opening or the die closing is completed, the slider 150 moves relatively so that the second locking groove 159 or the first locking groove 157 is just above the elastic fixing block 137, and the elastic fixing block 137 protrudes again and is locked into the second locking groove 159 or the first locking groove 157 under the action of the self-deformation restoring force, so as to provide a certain fixing force for the slider 150, and prevent the slider.

In this embodiment, two elastic fixing blocks 137 are provided, the two elastic fixing blocks 137 are arranged at intervals, an elastic element is arranged at the top end of each elastic fixing block 137, and the elastic element is matched with the shapes of the first clamping groove 157 and the second clamping groove 159, so as to be conveniently clamped into the first clamping groove 157 or the second clamping groove 159. The resilient member is made of a resilient material, such as resilient resin or silicone, and can be compressed flush with the surface of the wear block 135.

In this embodiment, by providing the elastic fixing block 137 on the wear-resistant block 135, the slider 150 is fixed by the second engaging groove 159 and the first engaging groove 157 after the mold opening and closing are completed, so that the slider 150 moves within a certain range, and when the inclined guide post 190 is reset downward, the inclined guide post can smoothly extend into the slider 150, thereby avoiding the difficulty in mold closing caused by the improper resetting.

In this embodiment, the rear side surface of the slider 150 is in an inclined plane shape and is provided with the wear-resisting plate 155, and in the mold opening process, the corresponding position of the fixed mold plate is in contact with the wear-resisting plate 155, so that the slider 150 is prevented from being in direct contact with the fixed mold plate, and the wear resistance is improved.

The combined core-pulling mechanism 100 provided by the embodiment has the following movement process: after a product is molded, the mold in a mold closing state starts to open the mold, the movable mold core 130 moves downward in the vertical direction relative to the fixed mold core 110, and the inclined guide block 180 on the fixed mold core 110 and the inclined guide post 190 move upward synchronously relative to the movable mold core 130. Because the spring on the core pulling rod 171 is in a compressed state in the mold closing state, and the upper end of the core pulling rod 171 abuts against the inclined guide block 180, when the inclined guide block 180 moves upward, the spring pushes the core pulling rod 171 to move obliquely upward along the core pulling through hole 151, core pulling action is started, at this time, the inclined guide column 190 is not in contact with the inner wall of the inclined guide hole 153, and the slider 150 does not move. After the core pulling rod 171 is separated from the product molding structure, the inclined guide post 190 and the inclined guide block 180 continue to move upward synchronously relative to the movable mold core 130, the inclined guide post 190 abuts against the inner wall of the inclined guide hole 153, and the force applied to the slider 150 by the inclined guide post 190 is greater than the elastic resistance of the elastic fixing block 137 due to the large mold opening force, so that the elastic element on the elastic fixing block 137 is compressed and cannot be clamped in the first clamping groove 157 to block the slider 150 from moving. When the inclined guide post 190 moves upward for a certain distance relative to the movable mold core 130, the inclined guide post 190 is separated from the inclined guide hole 153 and separated from the slider 150, the slider 150 completes the demolding action, the inclined guide post 190 does not apply power to the slider 150, the second locking groove 159 at the bottom of the slider 150 is just positioned on the elastic fixing block 137, the elastic element on the elastic fixing block 137 extends into and is locked in the second locking groove 159, the slider 150 is prevented from moving continuously under the inertia effect, and when the inclined guide post 190 moves downward and is reset relatively, the inclined guide post 190 can be smoothly inserted into the inclined guide hole 153 to continue the next injection molding action.

In summary, the combined core-pulling mechanism 100 provided in this embodiment utilizes the spring and the mold opening force to replace the original oil cylinder to complete the core-pulling and demolding movement, thereby saving the cost, and meanwhile, the slanted ejecting mechanism is removed, thereby avoiding the abnormal phenomena of collision, movement friction occlusion and the like caused by insufficient reset in the long-term production process. In addition, the action of loosing core can go on simultaneously with the die sinking action, has reduced the cycle of moulding plastics to through setting up detachable dog 177 of loosing core, make to change the spring more convenient, quick.

Second embodiment

The present embodiment provides a combined core-pulling mold, which includes an injection molding machine and a combined core-pulling mechanism 100, wherein the basic structure and principle of the combined core-pulling mechanism 100 and the generated technical effects are the same as those of the first embodiment, and for the sake of brief description, reference may be made to the corresponding contents in the first embodiment for some parts that are not mentioned in the present embodiment.

The combined core pulling mechanism 100 comprises a fixed die core 110, a movable die core 130, a sliding block 150, an elastic core pulling insert 170, an inclined guide block 180 and an inclined guide post 190, wherein the fixed die core 110 and the movable die core 130 are arranged oppositely, the sliding block 150 is arranged on the movable die core 130 in a sliding manner, the inclined guide block 180 is arranged on the fixed die core 110 and is used for being abutted against the sliding block 150, the inclined guide post 190 is arranged on the inclined guide block 180 and extends out towards the direction close to the movable die core 130 and is used for extending into the sliding block 150 and pushing the sliding block 150 to slide, a core pulling through hole 151 is formed in the sliding block 150, the elastic core pulling insert 170 is movably arranged in the core pulling through hole 151, and the elastic core pulling insert 170 is used for extending out of the lower end part of the core pulling through hole 151 under the abutting of the inclined guide block 180 and.

In this embodiment, the movable mold core 130 is disposed on a movable mold plate, the movable mold plate is connected to an injection molding machine, and the movable mold core 130 is driven by the injection molding machine to move downward when opening the mold and upward when closing the mold.

The combination formula loose core mould that this embodiment provided, through setting up elasticity mold insert 170 for the action of loosing core is gone on simultaneously with the die sinking action, need not earlier through the hydro-cylinder motion, thereby has reduced the cycle of moulding plastics, in addition, utilize elasticity mold insert 170 and die sinking power to replace the hydro-cylinder and accomplish the drawing of core drawing the patterns motion, and got rid of the oblique top structure, and elasticity mold insert 170 and oblique ejector pin can not take place to interfere, avoided producing the risk of collision because of not enough producing that resets in the production, improved the security of production process greatly.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims

1. The utility model provides a modular mechanism of loosing core, its characterized in that, including cover half mould benevolence (110), movable mould benevolence (130), slider (150), elasticity core pulling mold insert (170), oblique guide block (180) and oblique guide pillar (190), cover half mould benevolence (110) with movable mould benevolence (130) sets up relatively, slider (150) slide to be set up on movable mould benevolence (130), oblique guide block (180) set up on cover half mould benevolence (110) and be used for supporting and holding on slider (150), oblique guide pillar (190) set up on oblique guide block (180) and to being close to the direction of movable mould benevolence (130) is stretched out for stretching into slider (150) and promotion slider (150) slide, core pulling through-hole (151) has been seted up on slider (150), elasticity core pulling mold insert (170) activity sets up in core pulling through-hole (151), just elasticity core pulling mold insert (170) are used for oblique guide block (180) support to hold down stretch out core pulling through-hole (151) to stretch out ) And retracts to the lower end of the core-pulling through hole (151) when the inclined guide block (180) is released from abutting.

2. The combined core pulling mechanism according to claim 1, wherein the elastic core pulling insert (170) comprises a core pulling rod (171) and an elastic member (173), the core pulling rod (171) is slidably received in the core pulling through hole (151) and is used for abutting against the inclined guide block (180), and the elastic member (173) is arranged between the core pulling rod (171) and the sliding block (150) and is used for pushing the core pulling rod (171) to slide towards the inclined guide block (180) and enabling the core pulling rod (171) to retract into the lower end part of the core pulling through hole (151).

3. The combined core pulling mechanism according to claim 2, wherein a stop ring (175) is arranged in the middle of the core pulling rod (171), one end of the elastic member (173) is connected with the stop ring (175), the other end of the elastic member is connected with the sliding block (150), and a core pulling stop block (177) is further arranged on the sliding block (150) and used for stopping the stop ring (175) from being separated from the core pulling through hole (151).

4. The combined core pulling mechanism according to claim 3, wherein the core pulling stopper (177) covers an end of the core pulling through hole (151) and is provided with an opening through which an end of the core pulling rod (171) extends, and the core pulling stopper (177) is detachably fixed on the slider (150) by a bolt.

5. The combined core pulling mechanism as claimed in claim 1, wherein the slider (150) is provided with an inclined guide hole (153) for the inclined guide post (190) to extend into, and an inner diameter of the inclined guide hole (153) is larger than a diameter of the inclined guide post (190) so that the inclined guide post (190) is in clearance fit with the inclined guide hole (153).

6. The combined core pulling mechanism according to claim 5, wherein the length T of the elastic core pulling insert (170) extending downwards out of the core pulling through hole (151) and the gap width X between the oblique guide post (190) and the inner wall of the oblique guide hole (153) satisfy the following formula:

T×sin(m)×sin(a)≤X

the included angle between the extending direction of the elastic core-pulling insert (170) and the horizontal direction is m, and the included angle between the extending direction of the inclined guide post (190) and the vertical direction is a.

7. The combined core pulling mechanism according to claim 5 or 6, wherein the length T of the elastic core pulling insert (170) extending downwards out of the core pulling through hole (151) and the gap width X between the oblique guide post (190) and the inner wall of the oblique guide hole (153) satisfy the following formula:

(T+Q)×sin(m)×sin(a)≤X

the included angle between the extending direction of the elastic core-pulling insert (170) and the horizontal direction is m, the included angle between the extending direction of the inclined guide post (190) and the vertical direction is a, and Q is a safety margin.

8. The combined core pulling mechanism according to claim 1, wherein a guide chute (131) is formed in the movable die core (130), the sliding block (150) is slidably disposed in the guide chute (131), and pressing strips (133) are disposed on two sides of the guide chute (131) and used for slidably abutting against the sliding block (150) and limiting the sliding block (150) in a vertical direction.

9. The combined core pulling mechanism according to claim 8, wherein a wear-resistant block (135) is further arranged at the bottom of the guide chute (131), the slider (150) is slidably arranged on the wear-resistant block (135), an elastic fixing block (137) is arranged on the wear-resistant block (135), a first clamping groove (157) and a second clamping groove (159) are formed at the bottom of the slider (150) at intervals, and the elastic fixing block (137) is used for being clamped in the second clamping groove (159) after mold opening and being clamped in the first clamping groove (157) after mold closing.

10. A modular core-pulling mold comprising a modular core-pulling mechanism according to any one of claims 1 to 9.