CN114939959A

CN114939959A - Needle seat injection mold

Info

Publication number: CN114939959A
Application number: CN202210862009.8A
Authority: CN
Inventors: 蒋灵怀; 吕文进; 刘常安
Original assignee: Xingxu Medical Instrument Suzhou Co ltd
Current assignee: Xingxu Medical Instrument Suzhou Co ltd
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2022-08-26
Anticipated expiration: 2042-07-21
Also published as: CN114939959B

Abstract

The invention discloses a needle base injection mold which comprises a mold body, wherein the mold body comprises a first template and a second template, a first mold core is fixedly connected with the first template, and a second mold core is fixedly connected with the second template; the first die core is provided with a first die cavity, the second die core is provided with a second die cavity, and the first die cavity and the second die cavity correspondingly form an injection molding cavity for injection molding of a product; the mould body also comprises a needle core assembly, an injection molding assembly, a demoulding assembly and a mould opening synchronization assembly; the needle file injection mold of this scheme design, after product injection moulding and cold-cut, the mould makes the slider drive the side needle translation through the synchronous subassembly of die sinking and moves back and dodge the thimble when the die sinking, and the thimble will the ejecting drawing of patterns of product to realize that the mould can accomplish the die sinking simultaneously, the side needle dodges the thimble and the ejecting product drawing of patterns of thimble, need not to accomplish step by step, and three process can go on simultaneously for the work efficiency of mould saves product production time.

Description

Needle seat injection mold

Technical Field

The invention relates to the technical field of injection molds, in particular to a needle seat injection mold.

Background

When needle file injection mold used, need die cavity and side needle cooperation to use, when advancing the glue pipe and annotating the glue toward the die cavity of mould in, inside the die cavity need be inserted to the side needle, wait to the product shaping in the die cavity and cool off the back, same with traditional injection mold, needle file injection mold also need earlier the die sinking, then use the thimble with the ejecting drawing of patterns of product, when nevertheless the thimble is ejecting with the product, the side needle need dodge, otherwise the thimble can take place the touching with the side needle when ejecting the product, lead to the damage of thimble. Therefore, after a product is cooled and formed, the needle base injection mold still needs to go through three processes, namely mold opening, side needle avoiding and ejector pin ejection product demolding, the three processes are completed step by step, the working efficiency of the mold is greatly influenced, the production process of the product is slow, and meanwhile, the mold is also required to be provided with a driving structure for driving the side needle avoiding.

Disclosure of Invention

In order to overcome the defects, the invention aims to provide a needle seat injection mold which can realize the synchronous operation of three processes of mold opening, side needle avoiding and ejector pin ejection product demolding, and effectively solves the technical problems of low working efficiency and slow production process of products due to the step-by-step operation of the three processes of the mold.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

the utility model provides a needle file injection mold, includes the mould body, the mould body includes first template and second template, still includes:

the die core assembly comprises a first die core and a second die core, the first die core is fixedly connected with the first template, and the second die core is fixedly connected with the second template; the first die core is provided with a first die cavity, the second die core is provided with a second die cavity, and the first die cavity and the second die cavity correspondingly form an injection molding cavity for injection molding of a product;

the needle core assembly comprises a side needle and a sliding block, the sliding block is movably arranged on the surface of the second template, the side needle is connected with the sliding block and movably arranged between the first die core and the second die core through the sliding block, and when the mold is used for injection molding, the side needle is positioned in an injection molding cavity formed by the first die cavity and the second die cavity;

the injection molding assembly comprises a rubber inlet pipe, and the rubber inlet pipe is communicated with the inside of the injection molding cavity;

the demolding component comprises an ejector pin, the second mold core is provided with a needle passing hole corresponding to the ejector pin, the ejector pin is arranged on a bottom plate, the bottom plate is positioned at the part of the mold body close to one side of the second mold core, and when the mold is opened, the ejector pin penetrates through the needle passing hole to eject a product out of a mold;

die sinking synchronizing assembly, including oblique guide block, oblique guide block with first template fixed connection, simultaneously seted up on the slider with oblique guiding hole that oblique guide block corresponds, the movably setting of guide block is in to one side in the oblique guiding hole, when the mould die sinking, through oblique guide block with oblique guiding hole cooperation, the slider area the side needle translation is dodged the thimble.

The needle file injection mold of this scheme design, beneficial effect is:

when the mold is opened, the oblique guide block is matched with the oblique guide hole, the force which is applied to the template by the mold for opening the mold is transferred to the slide block, so that the slide block can drive the side needle to move when the mold is opened, and the side needle can be separated from a product and avoid the ejector pin; meanwhile, the ejector pins arranged on the bottom plate can generate relative displacement with the ejector pins due to the movement of the second template during die opening, so that the ejector pins eject and demold the product, the die opening, the side pin avoiding ejector pins and the ejector pins ejecting the product and demold the product can be simultaneously completed by the die without being completed step by step, the three processes can be simultaneously performed, the working efficiency of the die is accelerated, and the production time of the product is saved; in addition, a driving mechanism for driving the sliding block to move does not need to be arranged on the die, so that the die structure is simplified, and the manufacturing cost is reduced.

When the mold designed by the scheme works, firstly, the mold is closed, a first cavity on a first mold core and a second cavity on a second mold core form an injection molding cavity, a side needle is inserted into the injection molding cavity, glue enters the injection molding cavity through a glue inlet pipe, the injection molding cavity enables a needle base product to be rapidly molded through the cooperation with the side needle, after the product is molded and cooled, the mold is opened, a second template starts to move, so that a first mold core and a second mold core are separated, because a sliding block is arranged on the second template, and simultaneously, the force applied to the second template by the mold for mold opening is transferred to the sliding block under the action of an inclined guide block and an inclined guide hole, the sliding block can drive the side needle to retreat to avoid an ejector pin, because of the movement of the second template, the ejector pin can generate relative displacement with the second template, the ejector pin can penetrate through a needle hole on the second template and the second mold core and then eject the product in the cavity out of the mold, when the ejector pin is ejected to a product, the slide block drives the side needle to retreat to a specified position, and the ejector pin cannot collide with the side needle, so that the whole working process of the die is completed.

Further, the die body further comprises an ejector pin protection assembly, the ejector pin protection assembly comprises a limiting ejector pin, the limiting ejector pin and the ejector pin are both arranged on the bottom plate, a limiting through hole corresponding to the limiting ejector pin is formed in the sliding block, and when the sliding block moves and the limiting through hole and the limiting ejector pin are on the same straight line, the limiting ejector pin penetrates through the limiting through hole; the principle of the thimble protection component is as follows: if the side needle is not retracted in place, the side needle still touches the top needle, the timing of ejecting the material by the ejector pin can be limited by the limit ejector rod in cooperation with the limit through hole formed in the slide block, once the side needle is not retracted to the designated position, the limit through hole formed in the slide block is not aligned with the limit ejector rod, the limit ejector rod can be ejected by the slide block on the second template after penetrating through the second template, so that the second template cannot move, at the moment, the whole mold opening process of the mold is blocked and stopped, the second template cannot move for mold opening, the ejector pin cannot eject the product, the whole mold stops working, and the safety locking function that the ejector pin cannot eject the product if the side needle is not retracted in place is realized; if the side needle retreats to the appointed position, the limiting through hole formed in the sliding block is aligned with the limiting ejector rod, the limiting ejector rod can directly penetrate through the limiting through hole, the limiting ejector rod is not limited, and the ejector pin penetrates through the needle hole to eject a product out of a mold.

Furthermore, the tail part of the side needle is arranged on an installation block, a clamping block is arranged on the installation block, a clamping groove corresponding to the clamping block is formed in the sliding block, and the installation block and the sliding block are matched and detachably connected through the clamping groove and the clamping block; the side needle is arranged on the sliding block through the mounting block, and meanwhile, the mounting block can be quickly disassembled and assembled, so that the side needle can be quickly replaced; the detachable structure is realized through the matching of the clamping block and the clamping groove.

Furthermore, a plurality of injection molding cavities for injection molding of products are arranged, the injection molding assembly further comprises a shunting block, a plurality of shunting channels are formed in the shunting block, one shunting channel is correspondingly communicated to the inside of one injection molding cavity, and a main channel in the rubber inlet pipe is communicated with all the shunting channels; the mold can simultaneously work with a plurality of injection molding cavities, so that the working efficiency is improved, and the glue injection in the cavities can be distributed to the distribution channels through the glue inlet pipes and then distributed into the respective injection molding cavities through each distribution channel.

Furthermore, the number of the first cavities arranged on the first mold core is a plurality, the first cavities are arranged in two rows and are symmetrically arranged on the first mold core, and the shunting blocks are positioned in the middle area of the two rows of the first cavities; meanwhile, the positions and the number of the second cavities formed in the second die core correspond to those of the first cavities formed in the first die core one by one; two rows of opposite symmetry can realize that a reposition of redundant personnel piece cooperation advances the rubber tube and moulds plastics to two rows of die cavities of left and right sides simultaneously, improves the holistic work efficiency of mould.

Furthermore, a left die core assembly and a right die core assembly are arranged between the first template and the second template, and the sliding blocks comprise a first sliding block, a second sliding block, a third sliding block and a fourth sliding block; the two sliders which are positioned at the edges and drive the side needles to move are a first slider and a fourth slider, the first slider and the fourth slider are provided with the inclined guide holes and are matched with the inclined guide blocks, the two sliders which are positioned in the middle and drive the side needles to move are a second slider and a third slider, the first slider and the third slider are connected through a first connecting rod, and the second slider and the fourth slider are connected through a second connecting rod; the injection molding cavities are arranged in multiple rows to work simultaneously, which means that multiple rows of side needles are arranged, each row of side needles is connected with a slide block, and the structure can synchronously move the slide blocks connected with two groups of mold core components, namely four rows of side needles; the first sliding block and the third sliding block have the same moving direction when the die is opened, and the first sliding block can move under the action of the force conducted when the die is opened through the inclined guide block and the inclined guide hole, so that the first sliding block can drive the third sliding block to move together through the first connecting rod; the second slider and the fourth slider are the same in moving direction when the die is opened, and the second slider can move under the action of the force conducted when the die is opened through the inclined guide block and the inclined guide hole, so that the second slider can drive the fourth slider to move together through the second connecting rod.

Furthermore, the die body also comprises a material blocking prevention mechanism, and when the slide block drives the side needle to move, a gap is formed between the slide block and the second die core; the anti-blocking mechanism comprises a blowing assembly, the blowing assembly is arranged on the sliding block and blows air towards the product on the die core to prevent the product from falling into the gap; when drawing of patterns after needle file injection mold shaping, the slider takes the side needle to roll back and dodge, and the thimble jacks up the product from mould benevolence, and the clearance that produces between slider and the second mould benevolence makes the product fall into wherein to cause the card material very easily, so set up the subassembly of blowing towards the product on the slider, prevent that the product from falling into the clearance between slider and the mould benevolence after the drawing of patterns in, can avoid the mould to appear the unable compound die's of card material condition effectively, guarantee that the mould can normally work.

Furthermore, the air blowing assembly comprises an air blowing hole, the air blowing hole is formed in the sliding block and blows air to the product on the mold core, and the position of the air blowing hole and the position of the product on the mold core are on the same straight line; the air blowing assembly can blow towards the product on the mold core for the air blowing hole arranged on the sliding block, the air blowing hole supplies air through an external air source, the product cannot fall into the gap between the sliding block and the mold core, meanwhile, the product and the air blowing hole are arranged on the same straight line, the air blowing hole can be aligned with the product to blow, the air blowing effect is better, and the condition that individual products cannot fall into the gap due to insufficient blowing force of the air blowing hole can be ensured.

Furthermore, a plurality of air blowing holes are formed in the sliding block, an air passage is formed in the sliding block, and the air passage is communicated with all the air blowing holes; set up a plurality of holes of blowing and blow simultaneously, and set up a total air flue in the slider, let this air flue intercommunication external air supply, form a whole air flue of blowing in the slider like this, improve the effect of blowing, avoid the product to fall into in the clearance because of single hole of blowing blows not enough.

Furthermore, a groove is further formed in one side of the mold core, the groove is located in the blowing direction of the blowing assembly, a material guide slope is arranged at the lower end of the groove, and the material guide slope inclines from the inside of the groove to the outside of the groove; when the product after drawing of patterns on the hole facing mould benevolence of blowing blows, some products can be blown in the recess of mould benevolence one side, the product that falls into in the recess though can not block the slider and reset, but can influence down of injecting glue structure when moulding plastics next time, so can set up the guide slope at the lower extreme of recess, because whole mould is vertical placing, the product that is located the recess can be because of the action of gravity along the recess gliding and break away from recess and mould from the guide slope of recess tip, thereby the ejection of compact smoothly.

Drawings

Fig. 1 is a schematic overall appearance diagram of the injection mold for the needle holder of the present invention.

Fig. 2 is a schematic diagram of an internal structure of the mold when the mold is closed.

Fig. 3 is a schematic diagram of the internal structure of the mold when the mold is opened.

FIG. 4 is an enlarged view of the injection molding assembly, the second mold core and the side pins.

Fig. 5 is an enlarged schematic view of the structures of the mounting block, the clamping block and the clamping groove.

Fig. 6 is an enlarged schematic diagram of the synchronous motion of the first slider, the second slider, the third slider and the fourth slider.

Fig. 7 is a schematic diagram of the anti-jamming mechanism.

Fig. 8 is an enlarged view of the structure of the groove in fig. 7.

In the figure: 1. a first template; 2. a second template; 3. a first mold core; 4. a second mold core; 5. injection molding a cavity; 6. a side needle; 7. a slider; 8. feeding a rubber tube; 9. a thimble; 10. pinhole crossing; 11. a base plate; 12. an inclined guide block; 13. an inclined guide hole; 14. a limit ejector rod; 15. limiting through holes; 16. mounting blocks; 17. a clamping block; 18. a card slot; 19. a shunting block; 20. a flow distribution channel; 21. a first slider; 22. a first slider; 23. a third slider; 24. a fourth slider; 25. a first link; 26. a second link; 27. a gap; 28. a gas blowing hole; 29. a groove; 30. a material guiding slope.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.

In the description of the present invention, it should be further noted that, unless otherwise specifically stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, and a communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 4, the present embodiment provides a needle base injection mold, including the mold body, the mold body includes first template 1 and second template 2, the mold body further includes: the die core assembly comprises a first die core 3 and a second die core 4, the first die core 3 is fixedly connected with the first template 1, and the second die core 4 is fixedly connected with the second template 2; the first die core 3 is provided with a first die cavity, the second die core 4 is provided with a second die cavity, and the first die cavity and the second die cavity correspondingly form an injection cavity 5 for injection molding of a product; the mold body further comprises a needle core assembly, the needle core assembly comprises a side needle 6 and a sliding block 7, the sliding block 7 is movably arranged on the surface of the second mold plate 2, the side needle 6 is connected with the sliding block 7, the side needle 6 is movably arranged between the first mold core 3 and the second mold core 4 through the sliding block 7, and when the mold is used for injection molding, the side needle 6 is positioned in an injection molding cavity 5 formed by the first mold cavity and the second mold cavity; the mould body further comprises an injection molding assembly, the injection molding assembly comprises a rubber inlet pipe 8, and the rubber inlet pipe 8 is communicated with the inside of the injection molding cavity 5; the mould body further comprises a demoulding component, the demoulding component comprises an ejector pin 9, the second mould core 4 is provided with a needle passing hole 10 corresponding to the ejector pin 9, the ejector pin 9 is arranged on a bottom plate 11, the bottom plate 11 is positioned at the position of the mould body close to one side of the second mould core 4, and when the mould is opened, the ejector pin 9 penetrates through the needle passing hole 10 to eject and demould a product; the mould body still includes the synchronous subassembly of die sinking, the synchronous subassembly of die sinking includes oblique guide block 12, oblique guide block 12 with first template 1 fixed connection, simultaneously seted up on the slider 7 with oblique guiding hole 13 that oblique guide block 12 corresponds, the movably setting of oblique guide block 12 is in oblique guiding hole 13, when the mould die sinking, through oblique guide block 12 with oblique guiding hole 13 cooperates, slider 7 takes the translation of side needle 6 is dodged thimble 9.

The specific working principle of the above embodiment is as follows: referring to fig. 2 and 3, firstly, the mold is closed, the first cavity on the first mold core 3 and the second cavity on the second mold core 4 form an injection cavity 5, the side needle 6 is inserted into the injection cavity 5, the glue enters the injection cavity 5 through the glue inlet pipe 8, the injection cavity 5 is matched with the side needle 6 to rapidly form the needle base product, after the product is formed and cooled, the mold is opened, the second mold plate 2 starts to move to separate the first mold core 3 from the second mold core 4, the slide block 7 is arranged on the second mold plate 2, and simultaneously, due to the action of the inclined guide block 12 and the inclined guide hole 13, the force applied by the mold to the second mold plate 2 for opening the mold is transferred to the slide block 7, the slide block 7 can drive the side needle 6 to retreat to avoid the thimble 9, meanwhile, due to the movement of the second mold plate 2, the thimble 9 can generate relative displacement with the second mold plate 2, the thimble 9 can push out the product in the cavity after passing through the needle hole 10 on the second mold plate 2 and the second mold core 4, when the thimble 9 is pushed to the product, the slide block 7 already takes the side needle 6 to retreat to the appointed position, the thimble 9 will not collide with the side needle 6, thus finish the whole work flow of the mould.

The advantages of the above embodiment are: when the mold is opened, the inclined guide block 12 is matched with the inclined guide hole 13, the force applied to the mold plate by the mold for opening the mold is transferred to the slide block 7, so that the slide block 7 drives the side needle 6 to translate and avoid the thimble 9, meanwhile, the thimble 9 arranged on the bottom plate 11 generates relative displacement with the thimble 9 due to the movement of the second mold plate 2 during opening the mold, so that the thimble 9 ejects and releases the product, thus, the mold opening can be simultaneously completed by the mold, the side needle 6 avoids the thimble 9 and the thimble 9 ejects the product for demolding, the product demolding is not required to be completed step by step, the three processes can be simultaneously performed, the working efficiency of the mold is accelerated, and the production time of the product is saved; in addition, a driving mechanism for driving the sliding block 7 to move does not need to be arranged on the die, so that the die structure is simplified, and the manufacturing cost is reduced.

A linear track is arranged on the second template 2, and the sliding block 7 is arranged on the linear track; the slider 7 can translate on the linear rail, and the linear rail can play the guide effect to the slider, guarantees the steady movement of slider, improves the whole job stabilization nature of mould.

Preferably, on the basis of the above embodiment, with reference to fig. 2 and 3, the mold body further includes an ejector pin protection assembly, the ejector pin protection assembly includes a limiting ejector pin 14, the limiting ejector pin 14 and the ejector pin 9 are both disposed on the bottom plate 11, the slider 7 is provided with a limiting through hole 15 disposed corresponding to the limiting ejector pin 14, and when the slider 7 moves, when the limiting through hole 15 and the limiting ejector pin 14 are on the same straight line, the limiting ejector pin 14 passes through the limiting through hole 15.

The principle of the thimble protection assembly is as follows: the thimble protection component mainly has the main function of ensuring that the product is ejected out by the thimble 9 on the premise that the side needle 6 is completely retracted, so that collision between the side needle 6 and the thimble 9 is avoided; if the side needle 6 does not retreat in place, the situation means that the product pushed by the ejector pin 9 still touches the side needle 6 at the moment, the timing of the ejection of the ejector pin 9 can be limited by the limit ejector rod 14 in cooperation with the limit through hole 15 formed in the slide block 7, once the side needle 6 does not retreat to the specified position, the limit through hole 15 formed in the slide block 7 is not aligned with the limit ejector rod 14, the limit ejector rod 14 is abutted by the slide block 7 on the second template 2 after penetrating through the second template 2, so that the second template 2 cannot move, at the moment, the whole mold opening process of the mold is blocked and stopped, the second template 2 cannot move to open the mold, the ejector pin 9 cannot eject the product, the whole mold stops working, and the safety locking function that the ejector pin 9 cannot eject the product if the side needle 6 does not retreat in place is realized; if the side needle 6 retreats to the designated position, the limiting through hole 15 formed in the sliding block 7 is aligned with the limiting ejector rod 14, the limiting ejector rod 14 can directly penetrate through the limiting through hole 15, the limiting ejector rod 14 cannot be jacked by the sliding block, the second template 2 can normally move, and the ejector pin 9 can penetrate through the second template 2 and a pin through hole formed in the second mold core 4 to eject and demold a product.

The above contents provide a structure for protecting the thimble, the key point of the structure is the matching between the limit through hole 15 provided on the slide block 7 and the limit ejector rod 14, as shown in fig. 2, before the mold is opened, the end of the limit ejector rod 14 is at a certain distance from the end surface of the slide block 7, when the mold is opened, the second template will move, at this time, the end of the limit ejector rod 14 will slowly approach the end surface of the slide block 7, and the slide block 7 is also moving, under normal conditions, when the slide block 7 moves to a specified position and stops, the limit through hole 15 provided on the slide block 7 just aligns with the limit ejector rod 14, at this time, the end of the limit ejector rod 14 can be inserted into the limit through hole; however, if the slide block 7 is not stopped at the designated position due to the inertia effect when moving, but moves forward a short distance at the designated position, so that the limit ejector rod 14 cannot be inserted into the limit through hole 15, the limit ejector rod 14 is clamped by the slide block 7, the second template 2 cannot be moved, the mold cannot be opened, and the whole mold needs to be stopped, so that a stop block can be arranged on the second template 2 to accurately position the moving distance of the slide block 7, and when the limit through hole 15 formed in the slide block 7 is aligned with the limit ejector rod 14, the stop block can clamp the slide block 7 and prevent the slide block 7 from moving.

Preferably, on the basis of the above embodiment, as shown in fig. 5, the tail of the side needle 6 is disposed on an installation block 16, a latch 17 is disposed on the installation block 16, a slot 18 corresponding to the latch is disposed on the slider, and the installation block 16 and the slider 7 are detachably connected through the slot 18 and the latch 17.

The side needle 6 is arranged on the sliding block 7 through the mounting block 16, and meanwhile, the mounting block 16 can be quickly disassembled and assembled, so that the side needle 6 can be quickly replaced; the detachable structure is realized by the matching of the clamping block 17 and the clamping groove 18.

Preferably, on the basis of the above embodiment, further optimization is performed, the injection molding cavity 5 for injection molding of the product is provided with a plurality of injection molding cavities, the injection molding assembly further comprises a shunting block 19, the shunting block 19 is provided with a plurality of shunting channels 20, one shunting channel 20 is correspondingly communicated to the inside of one injection molding cavity 5, and the main channel in the rubber inlet pipe 8 is communicated with all the shunting channels 20.

The injection mold can simultaneously work with a plurality of injection molding cavities 5, the work efficiency is improved, and the injected glue in the cavities can be distributed to the distributing channels 20 through the glue inlet pipes 8 and then distributed to the respective injection molding cavities 5 through each distributing channel 20.

Specifically, the number of the first cavities formed in the first mold core 3 is several, the several first cavities are arranged in two rows and symmetrically arranged on the first mold core 3, and the shunting block 19 is located in the middle area of the two rows of the first cavities; meanwhile, the positions and the number of the second cavities formed in the second mold core 4 correspond to those of the first cavities formed in the first mold core 3 one by one.

The two rows of symmetrical parts can realize that one shunting block 19 is matched with the rubber inlet pipe 8 to simultaneously carry out injection molding on the left row and the right row of cavities, thereby improving the integral working efficiency of the mold.

Specifically, as shown in fig. 6, a left die core assembly and a right die core assembly are arranged between the first template 1 and the second template 2, and the slide blocks include a first slide block 21, a second slide block 22, a third slide block 23 and a fourth slide block 24; the two sliders which are positioned at the edges and drive the side needle 6 to move are a first slider 21 and a fourth slider 24, the first slider 21 and the fourth slider 24 are provided with the inclined guide hole 13 and are matched with the inclined guide block 12, the two sliders which are positioned in the middle and drive the side needle 6 to move are a second slider 22 and a third slider 23, the first slider 21 and the third slider 23 are connected through a first connecting rod 25, and the second slider 22 and the fourth slider 24 are connected through a second connecting rod 26.

When the mould is provided with a plurality of rows of injection mould cavities to work simultaneously, the mould is represented by a plurality of rows of side needles 6, each row of side needles 6 is connected with a slide block, and the structure can synchronously move two groups of mould core components, namely the slide blocks connected with four rows of side needles 6; the specific principle is as follows: the first slide block 21 and the third slide block 23 have the same moving direction when the mold is opened, the first slide block 21 can move under the action of the force conducted when the mold is opened through the inclined guide block 12 and the inclined guide hole 13, so that the first slide block 21 can drive the third slide block 23 to move together through the first connecting rod 25; the second slider 22 and the fourth slider 24 have the same moving direction when the mold is opened, and the second slider 22 can move under the action of the force transmitted when the mold is opened through the inclined guide block 12 and the inclined guide hole 13, so that the second slider 22 can drive the fourth slider 24 to move together through the second connecting rod 26.

Preferably, based on the above embodiment, as shown in fig. 7, the mold body further includes an anti-sticking mechanism, and when the slide 7 drives the side needle 6 to move, a gap 27 exists between the slide 7 and the second mold core 4; the anti-jamming mechanism comprises a blowing assembly, wherein the blowing assembly is arranged on the sliding block 7 and blows air towards the product on the die core to prevent the product from falling into the gap 27.

When the needle seat injection mold is formed and then is demolded, the sliding block 7 drives the side needle 6 to retreat and avoid, the ejector pin 9 jacks up a product from the mold core, and a gap 27 generated between the sliding block 7 and the second mold core 4 easily enables the product to fall into the gap to cause material blocking, so that a blowing assembly blowing towards the product is arranged on the sliding block 7, the product is prevented from falling into the gap 27 between the sliding block 7 and the mold core after being demolded, the condition that the material blocking cannot be carried out on the mold can be effectively avoided, and the mold can normally work.

Specifically, the air blowing assembly comprises an air blowing hole 28, the air blowing hole 28 is formed in the sliding block 7 and blows air to the product on the mold core, and the position of the air blowing hole 28 and the position of the product on the mold core are on the same straight line.

The blowing component can be a blowing hole 28 formed in the slider 7, the blowing hole 28 supplies air through an external air source and blows air towards a product on the mold core, the product cannot fall into a gap 27 between the slider 7 and the mold core, meanwhile, the product and the blowing hole 28 are in a straight line, the blowing hole 28 can be aligned with the product to blow air, the blowing effect is better, and individual products cannot fall into the gap 27 due to insufficient blowing force of the blowing hole 28.

Specifically, a plurality of air blowing holes 28 are formed in the slider 7, an air passage is formed inside the slider 7, and the air passage is communicated with all the air blowing holes 28.

Set up a plurality of holes 28 of blowing and blow simultaneously, and set up a total air flue in slider 7, let this air flue intercommunication external air supply, form a whole air flue of blowing like this in slider 7, improve the effect of blowing, avoid the product to fall into in clearance 27 because of single hole 28 blows not enough.

Specifically, as shown in fig. 8, a groove 29 is further disposed on one side of the mold core, the groove 29 is located in the blowing direction of the blowing assembly, a material guiding slope 30 is disposed at a lower end of the groove 29, and the material guiding slope 30 is inclined from the inside of the groove 29 to the outside of the groove 29.

When the air blowing holes 28 blow air against the product demoulded on the mold core, part of the product can be blown into the groove 29 on one side of the mold core, the product falling into the groove 29 cannot block the slide block 7 to reset, but the downward movement of the glue injection structure in the next injection molding can be influenced, so that a material guide slope 30 can be arranged at the lower end of the groove 29, and the product positioned in the groove 29 can slide downwards along the groove 29 under the action of gravity and is separated from the groove 29 and the mold from the material guide slope 30 at the end part of the groove 29 due to the vertical arrangement of the whole mold, so that the product can be discharged smoothly; in addition, because the two side groove walls of the connecting part of the groove 29 and the material guiding slope 30 are corners, in order to avoid the product from being clamped in the corners, the groove walls of the connecting part can be set into smooth circular curved surfaces; the two corners of the groove bottom are set to be smooth inclined planes, so that the smoothness of the product falling in the groove 29 can be ensured.

The above embodiments are provided only for illustrating the technical idea and features of the present invention, and the purpose of the present invention is to provide those skilled in the art with understanding and implementing the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.

Claims

1. The utility model provides a needle file injection mold, includes the mould body, the mould body includes first template and second template, its characterized in that: further comprising:

the needle core assembly comprises a side needle and a sliding block, the sliding block is movably arranged on the surface of the second template, the side needle is connected with the sliding block, the side needle is movably arranged between the first mold core and the second mold core through the sliding block, and when the mold is used for injection molding, the side needle is positioned in an injection molding cavity formed by the first mold cavity and the second mold cavity;

the demolding assembly comprises an ejector pin, the second mold core is provided with a needle passing hole corresponding to the ejector pin, the bottom of the ejector pin is arranged on a bottom plate, the head of the ejector pin is aligned with the needle passing hole, the bottom plate is positioned at the position, close to one side of the second mold core, of the mold body, and when the mold is opened, the ejector pin penetrates through the needle passing hole to eject a product out of the mold;

mould opening synchronization assembly, including oblique guide block, oblique guide block with first template fixed connection, simultaneously seted up on the slider with oblique guiding hole that oblique guide block corresponds, the movably setting of guide block is in to one side in the oblique guiding hole, when the mould die sinking, through oblique guide block with oblique guiding hole cooperation, the slider area the side needle translation is dodged the thimble.

2. The needle holder injection mold according to claim 1, characterized in that: the mould body still includes thimble protection component, thimble protection component includes spacing ejector pin, spacing ejector pin with the thimble all sets up on the bottom plate, set up on the slider with the spacing via hole that spacing ejector pin corresponds the setting, when the slider removes, work as spacing via hole with when spacing ejector pin is on same straight line, spacing ejector pin passes spacing via hole.

3. The needle holder injection mold according to claim 1, characterized in that: the tail of the side needle is arranged on the mounting block, a clamping block is arranged on the mounting block, a clamping groove corresponding to the clamping block is formed in the sliding block, and the mounting block and the sliding block are matched and detachably connected through the clamping groove and the clamping block.

4. The needle holder injection mold according to claim 1, characterized in that: a cavity of moulding plastics for product injection moulding is provided with a plurality of, the subassembly of moulding plastics still includes the reposition of redundant personnel piece, a plurality of reposition of redundant personnel passageway has been seted up on the reposition of redundant personnel piece, and a reposition of redundant personnel passageway corresponds intercommunication to inside one the cavity of moulding plastics, just advance the sprue in the hose and all reposition of redundant personnel passageways intercommunication.

5. The needle hub injection mold of claim 4, wherein: the number of the first cavities arranged on the first mold core is a plurality, the first cavities are arranged in two rows and are symmetrically arranged on the first mold core, and the shunting blocks are positioned in the middle area of the two rows of the first cavities; meanwhile, the positions and the number of the second cavities formed in the second die core correspond to those of the first cavities formed in the first die core one by one.

6. The needle holder injection mold according to claim 5, characterized in that: a left die core assembly and a right die core assembly are arranged between the first template and the second template, and the sliding blocks comprise a first sliding block, a second sliding block, a third sliding block and a fourth sliding block; the two sliders which are positioned at the edges and drive the side needles to move are a first slider and a fourth slider, the first slider and the fourth slider are provided with oblique guide holes and are matched with the oblique guide blocks, the two sliders which are positioned in the middle and drive the side needles to move are a second slider and a third slider, the first slider and the third slider are connected through a first connecting rod, and the second slider and the fourth slider are connected through a second connecting rod.

7. The needle holder injection mold according to claim 1, characterized in that: the die body also comprises a material blocking prevention mechanism, and when the slide block drives the side needle to move, a gap is formed between the slide block and the second die core; the anti-blocking mechanism comprises a blowing component, wherein the blowing component is arranged on the sliding block and blows air towards a product on the mold to prevent the product from falling into a gap between the sliding block and the second mold core.

8. The needle holder injection mold according to claim 7, characterized in that: the air blowing assembly comprises an air blowing hole, the air blowing hole is formed in the sliding block and blows air to a product on the die, and the position of the air blowing hole and the position of the product on the die are on the same straight line.

9. The needle holder injection mold according to claim 8, characterized in that: a plurality of air blowing holes are formed in the sliding block, an air passage is arranged inside the sliding block, and the air passage is communicated with all the air blowing holes.

10. The needle holder injection mold according to claim 7, characterized in that: a groove is further formed in one side of the second mold core and located in the blowing direction of the blowing assembly, a material guide slope is arranged at the lower end of the groove and inclines from the inside of the groove to the outside of the groove.