CN111645281A

CN111645281A - Automatic demoulding injection mould for elbow products

Info

Publication number: CN111645281A
Application number: CN202010592752.7A
Authority: CN
Inventors: 黄生仁
Original assignee: Taicang Gairuite Plastic Mould Co ltd
Current assignee: Taicang Gairuite Plastic Mould Co ltd
Priority date: 2020-06-25
Filing date: 2020-06-25
Publication date: 2020-09-11

Abstract

The invention discloses an injection mold for automatically demolding an elbow product, which comprises a female mold fixing plate, a female mold plate, a push plate, a male mold plate, a bottom plate and two groups of elbow tripping mechanisms, wherein each elbow tripping mechanism comprises a core assembly, a core plate assembly, two guide columns, a pull rod, a connecting plate, an oil cylinder and an oil cylinder seat; the core assembly comprises a core main body and a core guiding head; the rear end of the core main body is fixedly connected with the core plate assembly, one ends of the two guide pillars penetrate through the core plate assembly and are fixedly connected with the push plate, the other ends of the two guide pillars are fixedly connected with the oil cylinder seat, the telescopic shaft of the oil cylinder penetrates through the oil cylinder seat and is fixedly connected with the core plate assembly, one end of the pull rod penetrates through the core plate assembly and the core main body and is rotatably connected with the core guide head through a pin shaft, the other end of the pull rod is fixedly connected with the connecting plate, and the connecting plate is sleeved on one guide pillar in a sliding manner. The invention realizes smooth demoulding of elbow products in two directions, and has the advantages of simple structure, convenient implementation and the like.

Description

Automatic demoulding injection mould for elbow products

Technical Field

The invention relates to an injection mold, in particular to an injection mold for automatically demolding an elbow product.

Background

The injection mold is a tool for producing plastic products and consists of a movable mold and a fixed mold, wherein the movable mold and the fixed mold are closed to form a pouring system and a cavity during injection molding, and the movable mold and the fixed mold are separated during mold opening so as to take out the plastic products. However, referring to fig. 1, some plastic products 100 (such as elbow products) have two circular arc buckling positions 101, axes of the two circular arc buckling positions are perpendicular to each other, and an opening diameter of the elbow product is large, after the injection molding of the products is completed, circular arc core pulling in two directions is often required while the mold is opened, but the existing circular arc core pulling structure cannot meet the requirement, and the structure is relatively complex, so it is necessary to design and develop an injection mold applied to the plastic products.

Disclosure of Invention

In order to solve the technical problems, the invention provides an automatic demoulding injection mold for an elbow product, which realizes smooth demoulding of the elbow product in two directions and has the advantages of simple structure, convenience in implementation and the like.

The technical scheme of the invention is realized as follows:

an injection mold for automatically demolding elbow products comprises a female mold fixing plate, a female mold plate, a push plate, a male mold plate and a bottom plate which are sequentially arranged, wherein the male mold plate is arranged on the bottom plate through two cushion blocks, so that an assembly space is formed between the male mold plate and the bottom plate, a male mold core is arranged in a square hole in the middle of the push plate, the bottom end of the male mold core is fixedly connected with the male mold plate, the male mold core and the female mold plate enclose a cavity for injection molding, the injection mold further comprises two groups of elbow tripping mechanisms which are in one-to-one correspondence with two pipe orifices of an elbow product, and each group of elbow tripping mechanism comprises a mold core assembly, a mold core plate assembly, two guide pillars, a pull rod, a connecting plate, an oil cylinder and an oil cylinder seat; the die core assembly comprises a die core main body and die core guiding heads, wherein the front end of the die core main body is provided with a notch groove, the die core guiding heads are arranged in the notch groove, the die core guiding heads and the die core main body jointly form a die core for forming a pipe orifice of an elbow product, the front ends of the die cores of the die core assemblies of the two groups of elbow tripping mechanisms are butted to form a pipe core for forming the elbow product, and corresponding trapezoidal convex blocks and trapezoidal grooves are formed on the surfaces, mutually butted, of the front ends of the two die core guiding heads of the two groups of elbow tripping mechanisms; the rear end of the core main body is fixedly connected with the core plate assembly, the core plate assembly is arranged on the side surfaces of the push plate and the female die plate, one ends of two guide pillars penetrate through a first through hole in the core plate assembly and then are fixedly connected with the push plate, the other ends of the two guide pillars are fixedly connected with the oil cylinder base, the oil cylinder is arranged on the outer side of the oil cylinder base, a telescopic shaft of the oil cylinder penetrates through the oil cylinder base and then is fixedly connected with the core plate assembly, one end of a pull rod penetrates through second through holes in the core plate assembly and the core main body in sequence and then is rotatably connected with the core guide head through a pin shaft, the other end of the pull rod is fixedly connected with the connecting plate, and the connecting plate is sleeved on one guide pillar in a sliding mode.

Furthermore, each group of elbow tripping mechanisms further comprises a guide rod, one end of the guide rod is fixedly connected with the oil cylinder base, and the other end of the guide rod penetrates through a third through hole in the connecting plate.

Furthermore, the side surface of the mold core guiding head is in sliding connection with the side wall of the notch groove through two groups of guiding strips and guiding grooves which are matched with each other.

Further, the core plate assembly comprises a first core plate, a second core plate and a third core plate, a circular plate hole is formed in the center of the first core plate, a circular plate is formed at the rear end of the core body, the circular plate is inserted into the circular plate hole from the inner side of the first core plate, the second core plate is fixedly connected to the outer side of the first core plate through a plurality of fasteners, and the second core plate is fixedly connected with the circular plate through a plurality of fasteners; the third core plate is fixedly connected to the middle of the outer side of the second core plate through a plurality of fasteners, and the telescopic shaft of the oil cylinder is fixedly connected with the third core plate.

Furthermore, a guide sliding groove is formed in the pull rod along the axis direction, a guide block is embedded in the second core plate, and the guide block is provided with a guide convex end in sliding fit with the guide sliding groove.

Furthermore, a front mold insert for forming material identification characters is embedded in the inner wall of the cavity of the female mold plate and is locked to the female mold plate through a fastener.

Furthermore, a plurality of spring grooves are formed in the surface, facing the push plate, of the female die plate, and air springs used for bouncing the push plate open are installed in the spring grooves.

Furthermore, the injection mold further comprises a sprue structure, the sprue structure comprises a sprue sleeve and a positioning ring, a sprue channel is formed on the male mold core, the top end of the sprue sleeve is fixed to the top of the female mold fixing plate through the positioning ring, the bottom end of the sprue sleeve penetrates through a through hole in the female mold plate and then extends into the sprue channel, and the sprue channel and the clamping structure are located on the inner side of the bending position of the elbow product.

Furthermore, injection mold still includes runner ejection structure, runner ejection structure includes thimble and thimble board, the thimble board is located the top of bottom plate is located two between the cushion, the bottom rigid coupling of thimble in on the thimble board, the top of thimble passes the core plate reaches stretch into behind the thimble hole on the core mould benevolence in the runner channel.

The invention has the beneficial effects that: the invention provides an injection mold for automatically demolding an elbow product, which is provided with two groups of elbow tripping mechanisms corresponding to two pipe orifices of the elbow product, realizes smooth demolding of the elbow product in two vertical directions, and has the advantages of simple structure, convenience in implementation and the like. The technical principle of the elbow tripping mechanism is as follows: firstly, the oil cylinder drives the core plate assembly to retreat, and as the core body of the core plate assembly is fixedly connected to the core plate assembly, the core plate assembly drives the core body to retreat when retreating, and the core guide head is kept still as the connecting plate is arranged in the middle of the guide pillar; when the core main body is separated from the set distance, the core plate assembly slides to the connecting plate along the guide pillar, at the moment, the core plate assembly drives the connecting plate and the pull rod to retreat, the pull rod drives the core guide head to be demolded, corresponding trapezoidal convex blocks and trapezoidal grooves are formed on the surfaces, butted with each other, of the front ends of the two core guide heads, the core guide heads are rotatably connected with the pull rod through pin shafts, the core guide heads rotate inwards under the interaction of the trapezoidal convex blocks and the trapezoidal grooves, so that the arc-shaped parts of elbow products can be avoided, and the arc-shaped core pulling in two directions is realized.

Drawings

FIG. 1 is a schematic structural view of an embodiment of an elbow product of the invention;

FIG. 2 is a perspective view of an injection mold for automatically demolding an elbow product of the present invention;

FIG. 3 is a side view of an injection mold for automatically demolding elbow products of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a top view of the automatic ejection injection mold for elbow products of the present invention;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 7 is a cross-sectional view taken along line C-C of FIG. 5;

FIG. 8 is an exploded view of the automatic ejection injection mold for elbow products of the present invention;

FIG. 9 is a schematic view of a core package according to the present invention;

FIG. 10 is a schematic view of another core package according to the present invention;

FIG. 11 is an assembly view of the master form and air spring of the present invention;

the following description is made with reference to the accompanying drawings:

1-female die fixing plate, 2-female die plate, 21-front die insert, 22-spring groove, 23-air spring, 3-push plate, 4-male die plate, 5-bottom plate, 6-cushion block, 7-male die core, 10-elbow tripping mechanism, 110-core assembly, 111-core main body, 1111-notch groove, 1112-disc, 112-core guide head, 113-core, 114-trapezoidal lug, 115-trapezoidal groove, 116-guide strip, 117-guide groove, 120-core plate assembly, 121-first core plate, 1211-circular plate hole, 122-second core plate, 123-third core plate, 124-guide block, 130-guide column, 140-pull rod, 141-guide sliding groove, 150-connecting plate, 160-oil cylinder, 170-oil cylinder seat, 180-guide rod, 20-sprue structure, 210-sprue sleeve, 220-positioning ring, 30-sprue ejection structure, 310-ejector pin, 320-ejector pin plate, 100-elbow product and 101-arc buckling position.

Detailed Description

In order that the present invention may be more clearly understood, specific embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

As shown in fig. 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11, an injection mold for automatically demolding elbow products comprises a female mold fixing plate 1, a female mold plate 2, a push plate 3, a male mold plate 4 and a bottom plate 5 which are sequentially arranged, wherein the male mold plate is mounted on the bottom plate through two cushion blocks 6, so that an assembly space is formed between the male mold plate and the bottom plate, a male mold core 7 is arranged in a square hole in the middle of the push plate, the bottom end of the male mold core is fixedly connected with the male mold plate, the male mold core and the female mold plate enclose a cavity for injection molding, the injection mold further comprises two groups of elbow tripping mechanisms 10 which are in one-to-one correspondence with two pipe orifices of the elbow products, and each group of elbow tripping mechanisms comprises a mold core assembly 110, a mold core assembly 120, two guide pillars 130, a pull rod 140, a connecting plate 150, A cylinder 160 and a cylinder mount 170; the core assembly comprises a core main body 111 and a core guiding head 112, wherein the front end of the core main body is provided with a notch groove 1111, the core guiding head is arranged in the notch groove, the core guiding head and the core main body jointly form a core 113 for forming a pipe orifice of an elbow product, the front ends of the cores of the core assemblies of the two groups of elbow tripping mechanisms are butted to form a pipe core for forming the elbow product, and the surfaces of the butted front ends of the two core guiding heads of the two groups of elbow tripping mechanisms are provided with corresponding trapezoidal lugs 114 and trapezoidal grooves 115; the rear end of the core plate main body is fixedly connected with the core plate assembly, the core plate assembly is arranged on the side surfaces of the push plate and the female die plate, one end of each of the two guide pillars passes through a first through hole in the core plate assembly and then is fixedly connected with the push plate, the other end of each of the two guide pillars is fixedly connected with the oil cylinder base, the oil cylinder is arranged on the outer side of the oil cylinder base, a telescopic shaft of the oil cylinder passes through the oil cylinder base and then is fixedly connected with the core plate assembly, one end of the pull rod sequentially passes through a second through hole in the core plate assembly and the core main body and then is rotatably connected with the core guide head through a pin shaft, the other end of the pull rod is fixedly connected with the connecting plate, and the connecting plate is slidably sleeved on one guide pillar.

In the structure, two groups of elbow tripping mechanisms are arranged corresponding to two pipe orifices of an elbow product, so that smooth demoulding of the elbow product in two vertical directions is realized, and the structure has the advantages of simple structure, convenience in implementation and the like. The technical principle of the elbow tripping mechanism is as follows: firstly, the oil cylinder drives the core plate assembly to retreat, the core plate assembly drives the core main body to retreat when the core plate assembly retreats because the core main body of the core plate assembly is fixedly connected to the core plate assembly, and the core guide head is kept still because the connecting plate is arranged in the middle of the guide pillar; when the core main body is separated from the set distance, the core plate assembly slides to the connecting plate along the guide post, at the moment, the core plate assembly drives the pull rod to retreat, the pull rod drives the core guiding heads to be demoulded, corresponding trapezoidal lugs and trapezoidal grooves are formed on the surfaces, butted with each other, of the front ends of the two core guiding heads, the core guiding heads are rotatably connected with the pull rod through pin shafts, and the core guiding heads rotate inwards under the interaction of the trapezoidal lugs and the trapezoidal grooves, so that the arc-shaped parts of elbow products can be avoided, and arc-shaped core pulling in two directions can be realized.

Preferably, referring to fig. 1, each group of elbow tripping mechanisms further includes a guide rod 180, one end of the guide rod is fixedly connected with the cylinder base, and the other end of the guide rod is inserted into the third through hole on the connecting plate. Therefore, the connecting plate can run more stably under the guiding action of the guide rod.

Preferably, referring to fig. 8, 9 and 10, the side surfaces of the mandrel guide head and the side walls of the cutaway slot are slidably connected by two sets of guide bars 116 and guide slots 117 that mate with each other. Like this, through the sliding fit of gib block and guide way, can avoid the in-process of core main part drawing of patterns to take place to rock. And the guide strip and the guide groove are matched with each other, so that the accurate and in-place die assembly can be determined.

Preferably, referring to fig. 1 and 3, the core plate assembly includes a first core plate 121, a second core plate 122 and a third core plate 123, the first core plate has a circular plate hole 1211 formed at the center thereof, a circular plate 1112 is formed at the rear end of the core body, the circular plate is inserted into the circular plate hole from the inner side of the first core plate, the second core plate is fixedly connected to the outer side of the first core plate through a plurality of fasteners, and the second core plate is fixedly connected to the circular plate through a plurality of fasteners; the third core plate is fixedly connected to the middle of the outer side of the second core plate through a plurality of fasteners, and the telescopic shaft of the oil cylinder is fixedly connected with the third core plate. Thus, the function of fixedly connecting the core main body can be realized by the cooperation of the first core plate and the second core plate. The function of fixedly connecting the telescopic shaft of the oil cylinder can be realized through the matching of the second core plate and the third core plate.

Preferably, referring to fig. 1, the pull rod is formed with a guide sliding groove 141 along the axial direction, and the second core plate is embedded with a guide block 124 having a guide convex end slidably engaged with the guide sliding groove. Therefore, the guide convex end of the guide block is in sliding fit with the guide sliding groove of the pull rod, and the function of sliding guide can be achieved.

Preferably, referring to fig. 6, a front mold insert 21 for forming a material identification pattern is embedded in an inner wall of the cavity of the female mold plate, and the front mold insert is locked to the female mold plate by a fastener. Thus, the material identification words can be formed in the injection molding process of the elbow product.

Preferably, referring to fig. 11, a plurality of spring grooves 22 are formed on a surface of the female mold plate facing the push plate, and air springs 23 for springing the push plate open are installed in the spring grooves. Therefore, the push plate can be bounced open after the die is opened through the plurality of air springs arranged on the female die plate, and the die collision during die closing can be avoided.

Preferably, referring to fig. 6, the injection mold further includes a gate structure 20, the gate structure includes a gate sleeve 210 and a positioning ring 220, a gate runner is formed on the core insert, a top end of the gate sleeve is fixed to a top of the female mold fixing plate through the positioning ring, a bottom end of the gate sleeve passes through a through hole in the female mold plate and then extends into the gate runner, and the gate runner and the clamping structure are located on an inner side of a bending portion of the elbow product. Like this, can realize injecting through the runner structure and advance gluey function, the runner is located the department of bending of elbow product, and it advances gluey to be convenient for mould plastics.

Preferably, referring to fig. 6, the injection mold further includes a gate ejection structure 30, the gate ejection structure includes an ejector pin 310 and an ejector pin plate 320, the ejector pin plate is disposed at the top of the bottom plate and located between the two cushion blocks, a bottom end of the ejector pin is fixedly connected to the ejector pin plate, and a top end of the ejector pin penetrates through the pin hole of the male mold plate and the male mold core and then extends into the gate runner. Thus, the gate ejection structure can eject the gate injected with glue. Meanwhile, the gate is connected with the elbow product, so that the elbow product can be ejected out in the process of ejecting the gate.

The above embodiments have been described in detail with reference to the accompanying drawings. Those skilled in the art can make various modifications and changes to the above embodiments without departing from the spirit of the invention, and the scope of the invention is covered thereby.

Claims

1. The utility model provides an automatic injection mold of drawing of patterns of elbow product, includes that the order sets up female mould fixed plate (1), female mould board (2), push pedal (3), core plate (4) and bottom plate (5), core plate through two cushion (6) install in on the bottom plate, make core plate with form the assembly space between the bottom plate, be equipped with core (7) in the square hole at push pedal middle part, the bottom of core with core fixed connection, core with the female mould board encloses into the die cavity for moulding plastics, its characterized in that: the injection mold also comprises two groups of elbow tripping mechanisms (10) which correspond to two pipe orifices of an elbow product one by one, wherein each group of elbow tripping mechanism comprises a core assembly (110), a core plate assembly (120), two guide pillars (130), a pull rod (140), a connecting plate (150), an oil cylinder (160) and an oil cylinder seat (170); the core assembly comprises a core main body (111) and a core guiding head (112), the front end of the core main body is provided with a notch groove (1111), the core guiding head is arranged in the notch groove, the core guiding head and the core main body jointly form a core (113) for forming a nozzle of an elbow product, the front ends of the cores of the core assembly of the two elbow tripping mechanisms are butted to form a tube core for forming the elbow product, and the surfaces of the front ends of the two core guiding heads of the two elbow tripping mechanisms, which are butted with each other, are provided with corresponding trapezoidal lugs (114) and trapezoidal grooves (115); the rear end of the core main body is fixedly connected with the core plate assembly, the core plate assembly is arranged on the side faces of the push plate and the female die plate, one ends of two guide pillars penetrate through a first through hole in the core plate assembly and then are fixedly connected with the push plate, the other ends of the two guide pillars are fixedly connected with the oil cylinder base, the oil cylinder is arranged on the outer side of the oil cylinder base, a telescopic shaft of the oil cylinder penetrates through the oil cylinder base and then is fixedly connected with the core plate assembly, one end of a pull rod penetrates through a second through hole in the core plate assembly and the core main body in sequence and then is rotatably connected with the core guide head through a pin shaft, the other end of the pull rod is fixedly connected with the connecting plate, and the connecting plate is sleeved on one guide pillar in a sliding mode.

2. The elbow product automatic demolding injection mold of claim 1, wherein: each group of elbow tripping mechanisms further comprises a guide rod (180), one end of each guide rod is fixedly connected with the oil cylinder base, and the other end of each guide rod penetrates through a third through hole in the connecting plate.

3. The elbow product automatic demolding injection mold of claim 1, wherein: the side surface of the mold core guiding head is in sliding connection with the side wall of the notch groove through two groups of mutually matched guiding strips (116) and guiding grooves (117).

4. The elbow product automatic demolding injection mold of claim 1, wherein: the core plate assembly comprises a first core plate (121), a second core plate (122) and a third core plate (123), a circular plate hole (1211) is formed in the center of the first core plate, a circular plate (1112) is formed at the rear end of the core body, the circular plate is inserted into the circular plate hole from the inner side of the first core plate, the second core plate is fixedly connected to the outer side of the first core plate through a plurality of fasteners, and the second core plate is fixedly connected with the circular plate through a plurality of fasteners; the third core plate is fixedly connected to the middle of the outer side of the second core plate through a plurality of fasteners, and the telescopic shaft of the oil cylinder is fixedly connected with the third core plate.

5. The elbow product automatic demolding injection mold of claim 4, wherein: the pull rod is provided with a guide sliding groove (141) along the axis direction, the second core plate is embedded with a guide block (124), and the guide block is provided with a guide convex end in sliding fit with the guide sliding groove.

6. The elbow product automatic demolding injection mold of claim 1, wherein: and a front mold insert (21) for forming material identification characters is embedded in the inner wall of the cavity of the female mold plate and is locked on the female mold plate through a fastener.

7. The elbow product automatic demolding injection mold of claim 1, wherein: the surface of the female template facing the push plate is provided with a plurality of spring grooves (22), and air springs (23) used for bouncing the push plate open are installed in the spring grooves.

8. The elbow product automatic demolding injection mold of claim 1, wherein: the injection mold further comprises a sprue structure (20), the sprue structure comprises a sprue bush (210) and a positioning ring (220), a sprue channel is formed on the core insert, the top end of the sprue bush is fixed to the top of the female mold fixing plate through the positioning ring, the bottom end of the sprue bush penetrates through a through hole in the female mold plate and then extends into the sprue channel, and the sprue channel and the clamping structure are located on the inner side of a bending position of the elbow product.

9. The elbow product automatic demolding injection mold of claim 8, wherein: the injection mold further comprises a sprue ejection structure (30), the sprue ejection structure comprises ejector pins (310) and ejector pin plates (320), the ejector pin plates are arranged at the top of the bottom plate and located between the two cushion blocks, the bottom ends of the ejector pins are fixedly connected to the ejector pin plates, and the top ends of the ejector pins penetrate through the male mold plate and the ejector pin holes in the male mold core and then stretch into the sprue channel.