CN210911005U - A combined core-pulling mechanism and a combined core-pulling mold - Google Patents

Abstract

The utility model provides a combined core-pulling mechanism and a combined core-pulling mold, which relate to the technical field of molds. The block and the inclined guide post, the fixed die core and the movable die core are arranged oppositely, the slider is slidably arranged on the movable die core, the oblique guide block is set on the fixed die core and is used to abut the slider, and the oblique guide post is set on the movable die core. The inclined guide block protrudes toward the direction close to the movable mold core, the slide block is provided with a core-pulling through hole, and the elastic core-pulling insert is movably arranged in the core-pulling through hole. Compared with the prior art, in the combined core-pulling mechanism provided by the utility model, the core-pulling action and the mold-opening action are performed simultaneously, thereby reducing the injection cycle, and using the elastic core-pulling inserts and the mold-opening force to replace the oil cylinder to complete the core-pulling action The mold moves, and the inclined top structure is removed, which avoids the risk of collision due to insufficient reset during production, and greatly improves the safety of the injection molding process.

Description

A combined core-pulling mechanism and a combined core-pulling mold

technical field

The utility model relates to the technical field of molds, in particular to a combined core-pulling mechanism and a combined core-pulling mold.

Background technique

Existing structures for the end of the product, such as the end molding structure of the decorative strip, usually use the oil cylinder to provide power and push the product out through the inclined top. Due to the unstable production state, there is a risk of insufficient reset, resulting in the interference between the lifter and the fixed mold core, and there is a risk of collision between components. In addition, in the prior art, the oil cylinder is moved first, and then the mold opening is performed, and the entire injection molding cycle is long.

In view of this, it is particularly important to design and manufacture a safe and reliable combined core-pulling mechanism that has a short injection cycle and can avoid the risk of component collision.

Utility model content

The problem solved by the utility model is how to reduce the injection molding cycle, and how to avoid the collision of various components, which is safe and reliable.

In order to solve the above problems, the present invention adopts the following technical solutions.

In one aspect, the present invention provides a combined core-pulling mechanism, comprising a fixed die core, a movable die core, a slider, an elastic core-pulling insert, an oblique guide block and an oblique guide column, the fixed die core and the movable die core being opposite to each other. The slider is slidably arranged on the movable mold core, the oblique guide block is arranged on the fixed mold core and used to abut on the slider, and the oblique guide post is arranged on the oblique guide block and extends toward the direction close to the movable mold core. It is used to extend into the slider and push the slider to slide. The slider is provided with a core-pulling through hole, and the elastic core-pulling insert is movably arranged in the core-pulling through hole, and the elastic core-pulling insert is used in the inclined guide block. The lower end of the core-pulling through hole protrudes under the abutment of the slanted guide block, and retracts into the lower end of the core-pulling through hole when the oblique guide block is released from the abutment.

The combined core-pulling mechanism provided by the utility model uses the mold-opening force to push the slider to slide through the oblique guide rod when the mold is opened, and the oblique guide block resists the slider and the elastic core-pulling when the mold is closed. On the insert, the elastic core-pulling insert protrudes from the lower end of the core-pulling through hole, thereby completing the molding structure of the product. When the mold is opened, the oblique guide block is separated from the slider, and the oblique guide block releases the resistance to the elastic core-pulling insert. Under the action of its own elastic force, the elastic core-pulling insert retracts into the lower end of the core-pulling through hole to complete the core-pulling action, and the slider slides under the push of the inclined guide rod to complete the demoulding action. Compared with the prior art, in the combined core-pulling mechanism provided by the present invention, the core-pulling action and the mold-opening action are performed at the same time, and there is no need to move through the oil cylinder first, thereby reducing the injection cycle. The mold force replaces the oil cylinder to complete the core-pulling and demoulding movement, and removes the inclined top structure, and the elastic core-pulling insert and the inclined top rod will not interfere, avoiding the risk of collision due to insufficient reset in production, and greatly improving the Safety in the injection molding process.

Further, the elastic core-pulling insert includes a core-pulling rod and an elastic piece, the core-pulling rod is slidably accommodated in the core-pulling through hole and used to abut the oblique guide block, and the elastic piece is arranged between the core-pulling rod and the It is used to push the core-pulling rod to slide toward the direction of the inclined guide block and make the core-pulling rod retract into the lower end of the core-pulling through hole.

The utility model provides a combined core-pulling mechanism, which pushes the core-pulling rod to move through an elastic member, so that when the oblique guide block releases the resistance to the core-pulling rod, the core-pulling rod can automatically retract the lower end of the core-pulling through hole Then, the core pulling rod is separated from the product forming structure, and the core pulling action is completed. The core pulling action can be realized at the same time as the mold is opened, which shortens the injection cycle, and the lower end of the core pulling rod extends under the resistance of the inclined guide block. The core-pulling through hole can be pulled out and the forming structure of the product can be completed. The forming process is simple and smooth, and the phenomenon of stuck collision will not occur, which is safe and reliable.

Further, the middle part of the core pulling rod is provided with a blocking ring, one end of the elastic piece is connected with the blocking ring, and the other end is connected with the slider, and the slider is also provided with a core pulling block, which is used to stop the blocking ring from coming out of the core pulling through hole. .

The combined core-pulling mechanism provided by the utility model can prevent the core-pulling rod from being excessively ejected from the core-pulling through hole under the elastic force of the elastic member by setting the core-pulling stopper and configuring the blocking effect of the blocking ring. When the mold is closed again, the inclined guide block cannot resist the core pulling rod.

Further, the core-pulling block is covered at the end of the core-pulling through hole, and is provided with an opening for the end of the core-pulling rod to extend, and the core-pulling block is detachably fixed on the slider by bolts.

The utility model provides a combined core-pulling mechanism. By fixing the core-pulling block on the slider by bolts, when the elastic piece needs to be replaced, it is only necessary to remove the bolt on the core-pulling block, and the core-pulling block The blocks can be removed and replaced quickly, which is very convenient and fast and efficient.

Further, the sliding block is provided with an inclined guide hole for the inclined guide post to extend into, and the inner diameter of the inclined guide hole is larger than the diameter of the inclined guide post, so that the inclined guide post is clearance fit in the inclined guide hole.

In the combined core-pulling mechanism provided by the utility model, the oblique guide posts are gap-fitted in the oblique guide holes, so that the oblique guide posts can push the slider with a slight lag when the oblique guide block moves during mold opening, thereby reducing the movement of the slider for elastic core-pulling. The influence of the core-pulling action of the insert reduces the probability of jamming, which is beneficial for the elastic core-pulling insert to complete the core-pulling action.

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

T×sin(m)×sin(a)≤X;

Among them, m is the angle between the extension direction of the elastic core-pulling insert and the horizontal direction, and a is the angle between the extension direction of the inclined guide post and the vertical direction.

The combined core-pulling mechanism provided by the utility model limits the length of the elastic core-pulling insert extending out of the core-pulling through hole and the width of the gap between the oblique guide post and the inner wall of the oblique guide hole, so that when the mold is opened, the First, the elastic core-pulling insert is demolded. After the elastic core-pulling insert is retracted into the core-pulling through hole, the inclined guide post just abuts on the inner wall of the inclined guide hole, thereby pushing the slider to move, forming a delayed demoulding, which can reduce the Elastic core-pulling inserts cause damage to the molded product.

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

(T+Q)×sin(m)×sin(a)≤X;

Among them, m is the angle between the extension direction of the elastic core-pulling insert and the horizontal direction, a is the angle between the extension direction of the inclined guide post and the vertical direction, and Q is the safety margin.

The combined core-pulling mechanism provided by the utility model, through the setting of the above formula, makes the elastic core-pulling insert move for T distances and then move Q distances to ensure that the tail of the elastic core-pulling insert is completely separated from the molded product Afterwards, the inclined guide post is made to push the slider to slide to further prevent the elastic core-pulling insert from scratching the molded product due to contact when the slider slides when the slider is not completely separated.

Further, the movable mold core is provided with a guide chute, the slider is slidably arranged in the guide chute, and the two sides of the guide chute are provided with pressure strips for sliding against the slider and sliding against each other in the vertical direction. block is limited.

The combined core-pulling mechanism provided by the utility model, by arranging pressing bars on both sides of the guide chute, enables the sliding block to slide only along the extending direction of the pressing bar, and can prevent the sliding block from leaving the guide chute, which is safe and reliable.

Further, the bottom of the guide chute is also provided with a wear-resistant block, the sliding block is slidably arranged on the wear-resistant block, and the wear-resistant block is provided with an elastic fixing block, and the bottom of the sliding block is spaced with a first slot and a second groove. The card slot, the elastic fixing block is used to be held in the second card slot after mold opening, and held in the first card slot after mold closing.

In the combined core-pulling mechanism provided by the utility model, an elastic fixing block is arranged on the wear-resistant block, and after the mold opening and mold closing are completed, the slider is respectively fixed through the second card slot and the first card slot, so that the slider can be locked in the It can move within a certain range, and when the inclined guide post is reset downward, it can smoothly extend into the slider to avoid the difficulty in clamping the mold due to insufficient reset.

On the other hand, the utility model provides a combined core-pulling mold, including a combined core-pulling mechanism, the combined core-pulling mechanism includes a fixed mold core, a movable mold core, a slider, an elastic core-pulling insert, an inclined guide The block and the inclined guide post, the fixed die core and the movable die core are arranged oppositely, the slider is slidably arranged on the movable die core, the oblique guide block is set on the fixed die core and used to abut on the slider, and the oblique guide post is set on the movable die core. The inclined guide block protrudes toward the direction close to the movable mold core, and is used to extend into the slider and push the slider to slide. The slider is provided with a core-pulling through hole, and the elastic core-pulling insert is movably arranged in the core-pulling through hole. , and the elastic core-pulling insert is used to protrude the lower end of the core-pulling through hole under the resistance of the oblique guide block, and retract the lower end of the core-pulling through hole when the oblique guide block is released from the abutment.

In the combined core-pulling mold provided by the utility model, the elastic core-pulling inserts are arranged, so that the core-pulling action and the mold-opening action are performed simultaneously, without the need to move through an oil cylinder first, thereby shortening the injection cycle. In addition, the elastic core-pulling inserts are used. And the mold opening force replaces the oil cylinder to complete the core-pulling and demoulding movement, and the inclined top structure is removed, and the elastic core-pulling insert and the inclined top rod will not interfere, avoiding the risk of collision due to insufficient reset in production. The safety of the production process is improved.

Description of drawings

1 is a schematic diagram of the overall structure of the combined core pulling mechanism provided by the first embodiment of the present utility model;

Fig. 2 is the connection structure schematic diagram of fixed die core in Fig. 1;

Fig. 3 is the connection structure schematic diagram of the movable mold core in Fig. 1;

Fig. 4 is the partial exploded structure schematic diagram of the combined core pulling mechanism provided by the first embodiment of the present utility model;

5 is a schematic diagram of a partial connection structure of the combined core-pulling mechanism provided by the first embodiment of the present utility model;

FIG. 6 is a schematic diagram of the connection structure of the inclined top block and the inclined guide column in FIG. 5;

7 is a partial structural cross-sectional view of the combined core-pulling mechanism provided by the first embodiment of the present utility model;

FIG. 8 is a sectional view of the connection structure of the slider in FIG. 7;

Fig. 9 is the partial enlarged schematic diagram of IX in Fig. 8;

Fig. 10 is the partial enlarged schematic diagram of X in Fig. 8;

Figure 11 is a schematic diagram of the installation structure of the slider in Figure 1;

FIG. 12 is a schematic diagram of the bottom connection structure of the slider in FIG. 1 .

Description of reference numbers:

100-combined core pulling mechanism; 110-fixed die core; 130-movable die core; 131-guide chute; 133-pressing bar; 135-wear-resistant block; 137-elastic fixing block; 150-slider; 151-pulling Core through hole; 153-oblique guide hole; 155-wear-resistant plate; 157-first slot; 159-second slot; 170-elastic core-pulling insert; 171-core-pulling rod; 173-elastic piece; 175 -Baffle ring; 177-Core pull block; 180-Slanted guide block; 181-Resist groove; 190-Slanted guide post.

Detailed ways

In order to make the above objects, features and advantages of the present utility model more clearly understood, the specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

first embodiment

Referring to FIG. 1 to FIG. 3 , the present embodiment provides a combined core-pulling mechanism 100 , which uses the mold-opening force during mold opening and the elastic force of the core-pulling insert itself to provide power, replacing the original air cylinder, and extracting power. Core and mold opening are performed at the same time, without the need to first move through the cylinder, thus reducing the injection cycle. In addition, there is no need to set a lifter mechanism, which avoids the risk of collision caused by insufficient reset of the lifter mechanism, and greatly improves the safety in the injection molding process.

The combined core-pulling mechanism 100 provided in this embodiment includes a fixed die core 110, a movable die core 130, a slider 150, an elastic core-pulling insert 170, an oblique guide block 180 and an oblique guide post 190, the fixed die core 110 and the movable core The mold cores 130 are arranged opposite to each other, the slider 150 is slidably arranged on the movable mold core 130, the inclined guide block 180 is arranged on the fixed mold core 110 and is used to abut the slider 150, and the inclined guide post 190 is arranged on the inclined guide block 180 and protrudes toward the direction close to the movable mold core 130, for extending into the slider 150 and pushing the slider 150 to slide, the slider 150 is provided with a core-pulling through hole 151, and the elastic core-pulling insert 170 is movably arranged in the puller 150. Inside the core through hole 151, and the elastic core-pulling insert 170 is used to protrude the lower end of the core-pulling through-hole 151 under the resistance of the oblique guide block 180, and retract the core-pulling through hole 151 when the oblique guide block 180 is released from the abutment the lower end of the hole 151 .

In the present embodiment, the fixed mold core 110 is relatively disposed above the movable mold core 130 , a plurality of inclined guide blocks 180 are provided on the fixed mold core 110 , and each inclined guide block 180 is provided with an inclined guide post 190 . The movable mold core 130 is provided with a plurality of sliding blocks 150, and each sliding block 150 is provided with an elastic core-pulling insert 170, which can simultaneously perform injection molding on a plurality of ends of a product or ends of a plurality of products. When the mold is opened, the movable mold core 130 moves vertically downward. Under the push of the inclined guide column 190, the slider 150 slides backward relative to the movable mold core 130, and the elastic core-pulling insert 170 retracts under the action of its own elastic force. Pull the lower end of the core through hole 151, thereby realizing the actions of demolding and core pulling respectively; when the mold is closed, the movable mold core 130 moves vertically upward, and under the push of the inclined guide post 190, the sliding block 150 is relative to the movable mold The kernel 130 slides forward, the inclined guide block 180 is close to the slider 150 and abuts on the elastic core-pulling insert 170, so that the elastic core-pulling insert 170 overcomes its own elastic force and protrudes downward from the lower end of the core-pulling through hole 151, Thus, the molding structure of the product is completed. Specifically, the lower end of the elastic core-pulling insert 170 protruding from the core-pulling through hole 151 forms a through hole on the product.

It should be noted that the inclined guide block 180 is provided with an installation hole, the inclined guide post 190 is fixedly matched with the inclined guide block 180 through the installation hole, the inclined guide block 180 is fixed on the fixed mold core 110 by screws, and the inclined guide post 190 is inclined The elastic core-pulling insert 170 is movably disposed in the core-pulling through hole 151, and is disposed obliquely toward the front from top to bottom. It is worth noting that the front here refers to the direction in which the slider 150 is close to the product forming structure, that is, the moving direction of the slider 150 when the mold is closed, and the rear refers to the direction in which the slider 150 is away from the product forming structure, that is, when the mold is opened. The movement direction of the slider 150 .

The combined core-pulling mechanism 100 provided by the present invention uses the mold opening force to push the slider 150 to slide through the oblique guide rod when the mold is opened, and the oblique guide block 180 abuts on the slider 150 when the mold is closed, and resists On the elastic core-pulling insert 170, make the elastic core-pulling insert 170 protrude from the lower end of the core-pulling through hole 151, so as to complete the molding structure of the product. 180 releases the resistance to the elastic core-pulling insert 170, and the elastic core-pulling insert 170 retracts the lower end of the core-pulling through hole 151 under the action of its own elastic force, thereby completing the core-pulling action, and the slider 150 is in the position of the inclined guide rod. Push down and slide to complete the demoulding action.

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 accommodated in the core-pulling through hole 151 and is used to abut the inclined guide block 180, and the elastic member 173 It is provided between the core-pulling rod 171 and the slider 150 , and is used to push the core-pulling rod 171 to slide toward the direction of the inclined guide block 180 and make the core-pulling rod 171 retract into the lower end of the core-pulling through hole 151 . The core-pulling rod 171 is pushed by the elastic member 173 to move, so that when the oblique guide block 180 releases the abutment on the core-pulling rod 171, the core-pulling rod 171 can automatically retract the lower end of the core-pulling through hole 151, thereby making the core-pulling rod 171 retractable. 171 is separated from the product forming structure to complete the core-pulling action, which can realize the core-pulling action while opening the mold, shortening the injection cycle, and the lower end of the core-pulling rod 171 protrudes out of the core-pulling hole under the resistance of the inclined guide block 180. The hole 151 can also complete the forming structure of the product, the forming process is simple and smooth, the phenomenon of stuck collision will not occur, and it is safe and reliable.

In this embodiment, a blocking ring 175 is provided in the middle of the core pulling rod 171, one end of the elastic member 173 is connected with the blocking ring 175, and the other end is connected with the slider 150, and the slider 150 is also provided with a core pulling block 177, It is used to prevent the blocking ring 175 from coming out of the core pulling through hole 151 . Specifically, the blocking ring 175 is integrally provided in the middle of the core pulling rod 171 . By arranging the core-pulling block 177 and configuring the blocking effect of the blocking ring 175, the core-pulling rod 171 can be prevented from being excessively ejected from the core-pulling through hole 151 under the elastic force of the elastic member 173, and the inclined guide block 180 can be avoided when the mold is clamped again. The core pulling rod 171 cannot be resisted.

In this embodiment, the elastic member 173 is a spring, the spring is sleeved on the core-pulling lever, one end of the spring is connected to the retaining ring 175, and the other end is abutted against the inner wall of the core-pulling through hole 151, so that the lower part of the spring is Keeping the abutting state, the upper part is in a compressed state, and the core-pulling rod 171 can be pushed upwards when the oblique guide block 180 releases the abutment on the core-pulling rod 171 .

It should be noted that, in this embodiment, the resisting effect of the lower part of the spring is achieved by arranging an annular boss inside the core-pulling through hole 151 .

In this embodiment, the core-pulling block 177 is covered on the end of the core-pulling through hole 151, and is provided with an opening for the end of the core-pulling rod 171 to protrude, and the core-pulling block 177 is detachable through bolts Fixed on the slider 150 . Specifically, the upper surface of the core-pulling block 177 is flush with the upper surface of the slider 150, so that the oblique guide block 180 can be evenly stressed when pressed on the slider 150, and the size of the opening on the core-pulling block 177 It is smaller than the upper size of the core-pulling through hole 151, so that when the core-pulling block 177 is installed in place, only the core-pulling rod 171 can protrude from the opening, while the retaining ring 175 cannot protrude, and the core-pulling block 177 is removed. , the core-pulling rod 171 and the spring can be taken out from the core-pulling opening together. The core-pulling block 177 is fixed on the slide block 150 by bolts. When the elastic member 173 needs to be replaced, it is only necessary to remove the bolts on the core-pulling block 177, and the core-pulling block 177 can be removed for quick replacement. Convenient, fast and efficient.

In this embodiment, the lower surface of the oblique guide block 180 is further provided with a resisting groove 181 . When the oblique guide block 180 is pressed against the slider 150 , the inner wall of the resisting groove 181 abuts against the core pulling rod 171 . The upper end of the core-pulling rod 171 is perpendicular to the extending direction of the core-pulling rod 171, so that the core-pulling rod 171 is axially stressed, so as to prevent the core-pulling rod 171 from being greatly offset and affecting the core-pulling through hole 151. movement in .

The slider 150 is provided with an inclined guide hole 153 for the inclined guide post 190 to extend into. The inclined guide post 190 is clearance fit in the inclined guide hole 153 , so that the inclined guide post 190 can push the slider 150 to move with a lag when the inclined guide block 180 is in the mold-opening movement, reducing the movement of the slider 150 to the core pulling of the elastic core-pulling insert 170 The influence brought by the action reduces the probability of being stuck, thereby facilitating the elastic core-pulling insert 170 to complete the core-pulling action.

Specifically, the length T of the elastic core-pulling insert 170 extending downward from 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 satisfies the following formula:

(T+Q)×sin(m)×sin(a)≤X;

Wherein, m is the included angle between the extension direction of the elastic core-pulling insert 170 and the horizontal direction, and a is the included angle between the extension direction of the inclined guide post 190 and the vertical direction. Through the setting of the above formula, after the elastic core-pulling insert 170 moves for T distances, it moves Q distances to ensure that the tail of the elastic core-pulling insert 170 is completely separated from the molded product, and then the inclined guide post 190 is pushed The sliding block 150 slides to further prevent the elastic core-pulling insert 170 from scratching the molded product due to contact when the sliding block 150 is not completely separated.

It should be noted that the distances mentioned in this embodiment are all in mm. In this embodiment, Q is 0.02mm. By setting a safety margin of 0.02mm, the core-pulling rod 171 moves 0.02mm after moving T distances, and then the inclined guide rod pushes the slider 150 to slide to ensure that the core-pulling rod 150 slides. The tail of the 171 is completely out of the formed round hole on the product. Of course, the safety margin Q here may also be other values, such as 0.01 mm or 0.03 mm, and the value range of the safety margin Q in this embodiment is 0-0.05 mm.

It should also be noted that in this embodiment, after the core-pulling rod 171 moves for T+Q distances, the core-pulling block 177 just abuts on the blocking ring 175 , so that the core-pulling rod 171 stops moving.

Of course, in other preferred embodiments, when the desired manufacturing accuracy is achieved, a safety margin may not be provided here, that is, the length T of the elastic core-pulling insert 170 extending downward from the core-pulling through hole 151 and the slope The gap width X between the guide post 190 and the inner wall of the inclined guide hole 153 satisfies the following formula:

T×sin(m)×sin(a)≤X;

At this time, the sliding block 150 starts to slide just after the core pulling rod 171 is separated from the product.

In this embodiment, the movable mold core 130 is provided with a guide chute 131, the slider 150 is slidably arranged in the guide chute 131, and the two sides of the guide chute 131 are provided with pressure bars 133 for sliding against the slider. The slider 150 is limited on the 150 and in the vertical direction. Specifically, the pressing bars 133 are fixed on the movable mold core 130 by screws, and by arranging the pressing bars 133 on both sides of the guide chute 131, the sliding block 150 can only slide along the extending direction of the pressing bars 133, and the sliding block 150 can be prevented from disengaging Guide chute 131, safe and reliable.

In this embodiment, both sides of the bottom of the slider 150 also have a convex edge structure, and the convex edge structure extends below the pressure bar 133 , so that the slider 150 can be vertically positioned on the movable mold core 130 by the pressure bar 133 . , so that the slider 150 can only move along the extending direction of the pressing bar 133 .

The bottom of the guide chute 131 is also provided with a wear-resistant block 135, the slider 150 is slidably arranged on the wear-resistant block 135, and an elastic fixing block 137 is provided on the wear-resistant block 135, and the bottom of the slider 150 is spaced with a first card The slot 157 and the second clamping slot 159, the elastic fixing block 137 is used to be clamped in the second clamping slot 159 after the mold is opened, and clamped in the first clamping slot 157 after the mold is closed. Specifically, the wear-resistant block 135 is flush with the bottom wall of the guide chute 131, and is fixed on the movable mold core 130 by screws, and the wear-resistant block 135 is provided with an accommodating groove, and the elastic fixing block 137 is arranged in the accommodating groove. The elastic fixing block 137 is squeezed to be flush with the surface of the wear-resistant block 135 during the sliding process of the sliding block 150, so as to prevent the elastic fixing block 137 from affecting the movement of the sliding block 150. , when the slider 150 moves in place, that is, after the mold opening or closing is completed, the slider 150 moves relatively so that the second slot 159 or the first slot 157 is just above the elastic fixing block 137, and the elastic fixing block 137 Under the action of its own deformation restoring force, it protrudes again and snaps into the second slot 159 or the first slot 157 , thereby providing a certain fixing force for the slider 150 and preventing the slider 150 from continuing to move.

In this embodiment, there are two elastic fixing blocks 137 , and the two elastic fixing blocks 137 are arranged at intervals. The top end of each elastic fixing block 137 has an elastic element. The shapes are matched to facilitate being snapped into the first card slot 157 or the second card slot 159 . The elastic element is made of elastic material, such as elastic resin or silicone, and can be compressed to be flush with the surface of the wear-resistant block 135 .

In this embodiment, the elastic fixing block 137 is provided on the wear-resistant block 135, and the slider 150 is fixed through the second slot 159 and the first slot 157 after the mold opening and closing are completed, so that the slider 150 It can move within a certain range, and when the inclined guide post 190 is reset downward, it can smoothly extend into the sliding block 150, so as to avoid difficulty in mold clamping due to insufficient reset.

In the present embodiment, the rear side of the slider 150 is inclined, and is provided with a wear-resistant plate 155. During the mold opening process, the corresponding position of the fixed plate is in contact with the wear-resistant plate 155, avoiding direct contact with the slider 150. contact, improving wear resistance.

The movement process of the combined core pulling mechanism 100 provided in this embodiment is as follows: after the product is formed, the mold in the closed state starts to perform the mold opening movement, and the movable mold core 130 moves downward relative to the fixed mold core 110 in the vertical direction. , the inclined guide block 180 and the inclined guide post 190 on the fixed mold core 110 move upward synchronously relative to the movable mold core 130 . Because the spring on the core-pulling rod 171 is in a compressed state when the mold is closed, 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 along the core-pulling path. The hole 151 moves upwards obliquely to start the core-pulling action. At this time, there is no contact between the inclined guide post 190 and the inner wall of the inclined guide hole 153, and the slider 150 does not move. When the core pulling rod 171 is separated from the product forming structure, the inclined guide post 190 and the inclined guide block 180 continue to move upwardly relative to the movable mold core 130 synchronously. The force is large, so that the force applied by the inclined guide post 190 to the slider 150 is greater than the elastic resistance of the elastic fixing block 137, so that the elastic element on the elastic fixing block 137 is compressed and cannot be stuck in the first slot 157. Block the slider 150 sports. When the inclined guide post 190 continues to move upward relative to the movable die core 130 for a certain distance, the inclined guide post 190 escapes from the inclined guide hole 153 and separates from the slider 150 . When power is applied, the second slot 159 at the bottom of the slider 150 is just located on the elastic fixing block 137, and the elastic element on the elastic fixing block 137 extends into and is clamped in the second slot 159 to prevent the slider 150 from inertial Under the action, it continues to move, so that when the inclined guide post 190 moves downward relatively and resets, it can be smoothly inserted into the inclined guide hole 153 to continue the next injection molding operation.

To sum up, the combined core-pulling mechanism 100 provided in this embodiment uses the spring and the mold-opening force to replace the original oil cylinder to complete the core-pulling and demoulding motion, which saves costs, and at the same time removes the lifter mechanism to avoid long-term production processes. Collision due to insufficient reset, avoiding abnormal phenomena such as movement friction and occlusion. In addition, the core-pulling action and the mold-opening action can be performed at the same time, which shortens the injection molding cycle, and the detachable core-pulling block 177 is provided to make the replacement of the spring more convenient and fast.

Second Embodiment

This embodiment provides a combined core-pulling mold, including an injection molding machine and a combined core-pulling mechanism 100, wherein the basic structure, principle and technical effects of the combined core-pulling mechanism 100 are the same as those in the first embodiment. In the description, for the parts not mentioned in this embodiment, reference may be made to the corresponding content in the first embodiment.

The combined core-pulling mechanism 100 includes a fixed die core 110, a movable die core 130, a sliding block 150, an elastic core-pulling insert 170, an oblique guide block 180 and an oblique guide column 190. The fixed die core 110 and the movable die core 130 are arranged opposite to each other. The slider 150 is slidably arranged on the movable mold core 130 , the inclined guide block 180 is arranged on the fixed mold core 110 and is used to abut the slider 150 , and the inclined guide post 190 is arranged on the inclined guide block 180 and moves toward it. The direction of the mold core 130 is extended, and is used to extend into the slider 150 and push the slider 150 to slide. The slider 150 is provided with a core-pulling through hole 151, and the elastic core-pulling insert 170 is movably arranged in the core-pulling through hole 151. The elastic core-pulling insert 170 is used to protrude from the lower end of the core-pulling through hole 151 under the resistance of the oblique guide block 180 , and retract the lower end of the core-pulling through hole 151 when the oblique guide block 180 is released from the abutment.

In this embodiment, the movable mold core 130 is arranged on the movable template, and the movable template is connected with the injection molding machine. Driven by the injection molding machine, the movable mold core 130 can move downward when the mold is opened, and move upward when the mold is closed.

In the combined core-pulling mold provided in this embodiment, the elastic core-pulling inserts 170 are provided, so that the core-pulling action and the mold-opening action are performed simultaneously, without the need to move through the oil cylinder first, thereby reducing the injection cycle. In addition, the elastic core-pulling insert is used. 170 and the mold opening force replace the oil cylinder to complete the core pulling and demoulding movement, and remove the inclined top structure, while the elastic core pulling inserts 170 and the inclined top rod will not interfere, avoiding the collision due to insufficient reset during production. risk, greatly improving the safety of the production process.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be based on the scope defined by the claims.

Claims (10)

1. A combined core-pulling mechanism, characterized in that it comprises a fixed die core (110), a movable die core (130), a slider (150), an elastic core-pulling insert (170), and an inclined guide block (180) and the inclined guide post (190), the fixed die core (110) and the movable die core (130) are arranged opposite to each other, and the slider (150) is slidably arranged on the movable die core (130). An inclined guide block (180) is arranged on the fixed die core (110) and used to abut on the slider (150), and the inclined guide post (190) is arranged on the inclined guide block (180) and extend toward the direction close to the movable mold core (130), for extending into the sliding block (150) and pushing the sliding block (150) to slide, the sliding block (150) is provided with a core pulling a through hole (151), 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 the slanted guide block (170) 180 ) protrudes from the lower end of the core-pulling through hole (151) under the abutment, and retracts the lower end of the core-pulling through hole (151) when the oblique guide block (180) is released from the abutment. 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 piece (173), and the core-pulling rod (171) ) is slidably accommodated in the core-pulling through hole (151) and used to abut the oblique guide block (180), and the elastic member (173) is provided on the core-pulling rod (171) and the slider (150), for pushing the core-pulling rod (171) to slide in the direction of the inclined guide block (180) and making the core-pulling rod (171) retract into the core-pulling through hole (151) the lower end of the . 3 . The combined core pulling mechanism according to claim 2 , wherein a blocking ring ( 175 ) is arranged in the middle of the core pulling rod ( 171 ), and one end of the elastic member ( 173 ) is connected to the blocking ring ( 173 ). 4 . The ring (175) is connected, and the other end is connected with the slider (150). The slider (150) is also provided with a core-pulling stopper (177) for preventing the stopper ring (175) from coming out of the Core pulling through hole (151). 4. The combined core-pulling mechanism according to claim 3, characterized in that, the core-pulling block (177) is covered at the end of the core-pulling through hole (151), and is provided with a The end of the core-pulling rod (171) protrudes from the opening, and the core-pulling block (177) is detachably fixed on the sliding block (150) by means of bolts. 5. The combined core-pulling mechanism according to claim 1, wherein the slider (150) is provided with an inclined guide hole (153) for the inclined guide column (190) to extend into, so The inner diameter of the oblique guide hole (153) is larger than the diameter of the oblique guide post (190), so that the oblique guide post (190) is clearance fit in the oblique guide hole (153). 6. The combined core-pulling mechanism according to claim 5, characterized in that the length T of the elastic core-pulling insert (170) extending downward from the core-pulling through hole (151) and the oblique guide The gap width X between the column (190) and the inner wall of the inclined guide hole (153) satisfies 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 (170) and the horizontal direction, and a is the included angle between the extending direction and the vertical direction of the inclined guide post (190). 7. The combined core-pulling mechanism according to claim 5 or 6, wherein the length T of the elastic core-pulling insert (170) extending downward from the core-pulling through hole (151) is the same as the length T of the core-pulling through hole (151). The gap width X between the inclined guide post (190) and the inner wall of the inclined guide hole (153) satisfies the following formula: (T+Q)×sin(m)×sin(a)≤X Wherein, m is the angle between the extension direction of the elastic core-pulling insert (170) and the horizontal direction, a is the angle between the extension direction and the vertical direction of the inclined guide post (190), and Q is the safety margin . 8 . The combined core pulling mechanism according to claim 1 , wherein a guide chute ( 131 ) is provided on the movable mold core ( 130 ), and the slider ( 150 ) is slidably arranged on the guide. 9 . In the chute (131), pressure bars (133) are provided on both sides of the guide chute (131) for sliding against the slider (150) and vertically facing the slider (150) to limit the position. 9 . The combined core pulling mechanism according to claim 8 , wherein the bottom of the guide chute ( 131 ) is further provided with a wear-resistant block ( 135 ), and the sliding block ( 150 ) is slidably arranged on the The wear-resistant block (135) is provided with an elastic fixing block (137) on the wear-resistant block (135), and the bottom of the slider (150) is spaced apart from a first snap groove (157) and a second groove A card slot (159), the elastic fixing block (137) is used to be held in the second card slot (159) after mold opening, and held in the first card slot (157) after mold clamping )Inside. 10. A combined core-pulling mold, characterized in that it comprises the combined core-pulling mechanism according to any one of claims 1-9.

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