CN215791490U - Automatic water gap cutting die structure - Google Patents

Abstract

The utility model provides a nozzle automatic cutting die structure which comprises a rear die core, an upper ejector plate and a lower ejector plate, wherein a rear die profile and a nozzle profile are arranged at the top of the rear die core, a nozzle insert penetrates through the rear die core, a cutting hole penetrates through one side of the nozzle insert, the nozzle profile is communicated with the rear die profile through the cutting hole, an ejector pin is arranged on the upper ejector plate, a nozzle ejector pin penetrates through the upper ejector plate and the lower ejector plate, a movable cavity is arranged between the upper ejector plate and the lower ejector plate, and a limiting table positioned in the movable cavity is arranged at one side of the nozzle ejector pin. Form the product on the back mould profile during moulding plastics, form the mouth of a river on the mouth of a river profile, promote to go up thimble board and lower thimble board and rise, the thimble will rise and with product jack-up along with going up the thimble board in step, the product will rebound and break away from with back mould profile, the material cutting hole cuts off product and mouth of a river junction, after certain delay, the mouth of a river thimble is ejecting from the mouth of a river profile with the mouth of a river, the mouth of a river cuts off clean falling, reduces the human input, improves product quality.

Description

Automatic water gap cutting die structure

Technical Field

The utility model relates to a mould, in particular to an automatic water gap cutting mould structure.

Background

The injection mold is an important tool for manufacturing plastic products, molten plastic is filled into a cavity through a runner, the product is formed after the molten plastic is cooled and molded, and a water gap is a channel for connecting the runner and the product and plays a role in glue feeding and connecting a support. What current plastic part big mouth of a river side entered to glue adopted is the mode of artifical pruning, leads to the manufacturing procedure of product complicated, and production efficiency is low, extravagant manpower, and the processing quality is difficult to guarantee.

Disclosure of Invention

The utility model aims to solve the problem of providing an automatic water gap cutting die structure which can automatically cut a water gap when a product is ejected out, so that the labor input is reduced, the production efficiency is improved, and the product quality is improved.

The utility model provides a nozzle automatic cutting die structure which solves the technical problems and comprises a rear die core, an upper ejector plate and a lower ejector plate which are sequentially arranged from top to bottom, wherein the upper ejector plate is fixedly connected with the lower ejector plate, the top of the rear die core is provided with a rear die surface and a nozzle surface, a nozzle insert is arranged on the rear die core in a penetrating manner, one side of the nozzle insert is provided with a cutting hole in a penetrating manner, the nozzle surface is communicated with the rear die surface through the cutting hole, an ejector pin arranged on the rear die surface in a penetrating manner is fixedly connected to the upper ejector plate, nozzle ejector pins are arranged on the upper ejector plate and the lower ejector plate in a penetrating manner, the nozzle ejector pins are arranged on the nozzle surface in a penetrating manner, a movable cavity is arranged between the upper ejector plate and the lower ejector plate, one side of the nozzle ejector pin is provided with a limiting platform matched with the cross section of the movable cavity, the limiting platform is arranged in the movable cavity, and the depth of the movable cavity and the thickness of the limiting platform are respectively a, b, a > b.

Preferably, the nozzle thimble comprises an upper thimble and a lower thimble, the bottom end of the upper thimble is provided with an upper thimble cap, the bottom of the upper thimble plate is provided with a first limit groove in clearance fit with the upper thimble cap, the upper thimble cap is arranged on the first limit groove, the upper thimble penetrates between the upper thimble plate and the nozzle profile, the top end of the lower thimble is provided with a lower thimble cap, the top of the lower thimble plate is provided with a second limit groove matched with the cross section of the lower thimble cap, the lower thimble cap is arranged on the second limit groove, the bottom end of the lower thimble penetrates through the lower thimble plate, the depth of the second limit groove and the thickness of the lower thimble cap are c and d respectively, c is larger than d, the first limit groove and the second limit groove are spliced to form a movable cavity, and the upper thimble cap and the lower thimble cap are spliced to form a limit platform.

Preferably, a jacking profile is arranged at the contact surface of the nozzle profile and the nozzle thimble, and the jacking profile is arranged in a circular truncated cone shape.

Preferably, the material cutting holes are arranged in a triangular prism shape.

Preferably, the nozzle insert comprises a vertically arranged main body part and a limiting part bent and arranged at the bottom end of the main body part, a through hole matched with the main body part is arranged on the rear mold core in a penetrating manner, a limiting groove matched with the limiting part is arranged at the bottom end of the through hole, and the main body part and the limiting part are respectively arranged on the through hole and the limiting groove.

Preferably, the rear mold core is vertically provided with an ejector pin hole communicated with the rear mold surface in a penetrating manner, the ejector pin hole is in clearance fit with the ejector pin, the ejector pin hole is adjacent to the through hole, and the outlet end of the material cutting hole is adjacent to the top end surface of the ejector pin hole.

Preferably, the top end of the water gap insert is provided with an alignment end part extending out of the top end face of the rear mold core, and one side of the alignment end part is provided with a limit inclined plane.

The utility model has the beneficial effects that: the utility model provides a water gap automatic cutting mold structure which is provided with a unique assembly structure, wherein molten plastic flows onto a rear mold surface through a water gap mold surface and a material cutting hole during injection molding, a product is formed on the rear mold surface, and a water gap is formed on the water gap mold surface. The ejector pin plate and the lower ejector pin plate are pushed to the side of the rear mold core, the ejector pins lift up synchronously along with the upper ejector pin plate and exert upward thrust on a product, the product moves upwards and is separated from the rear mold surface, the water gap is tightly held by the water gap surface and the material cutting hole, the material cutting hole cuts off the product and the water gap joint, after a certain time delay, the bottom end of the movable cavity is abutted to the bottom end of the limiting table, and the water gap ejector pins are driven to lift up and eject the water gap from the water gap surface. The automatic water gap cutting device is simple in structure and easy and convenient to operate, automatically cuts off a water gap when a product is ejected out, the water gap is cut off cleanly, the manpower input is reduced, the production efficiency is improved, and the product quality is improved.

Drawings

Fig. 1 illustrates a schematic cross-sectional structure of the present invention.

Fig. 2 illustrates a schematic structural view of the external form of the present invention.

FIG. 3 is a schematic view illustrating a rear mold core according to the present invention.

Fig. 4 illustrates a partial enlarged structural view of a portion a of fig. 1 according to the present invention.

The reference numbers illustrate: the mold comprises a rear mold core 1, a rear mold surface 100, a water gap surface 101, a jacking surface 102, a through hole 103, a limiting groove 104, an ejector pin hole 105, an upper ejector plate 2, a first limiting groove 20, a lower ejector plate 3, a second limiting groove 30, a water gap insert 4, a material cutting hole 40, a main body part 41, a limiting part 42, an alignment end part 43, a limiting inclined plane 44, an ejector pin 5, a water gap ejector pin 6, a movable cavity 7, a limiting table 8, an upper ejector pin 9, an upper ejector pin cap 90, a lower ejector pin 11, a lower ejector pin cap 110, a product 12 and a water gap 13.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments.

All other embodiments of the person skilled in the art, which are obtained without inventive work on the basis of the described embodiments of the present disclosure, are within the scope of protection of the present disclosure.

Refer to fig. 1-2.

The utility model provides a nozzle automatic cutting die structure, which comprises a rear die core 1, an upper ejector plate 2 and a lower ejector plate 3 which are sequentially arranged from top to bottom, wherein the upper ejector plate 2 and the lower ejector plate 3 are fixedly connected, the top of the rear die core 1 is provided with a rear die surface 100 and a nozzle surface 101, the rear die core 1 is provided with a nozzle insert 4 in a penetrating manner, one side of the nozzle insert 4 is provided with a cutting hole 40 in a penetrating manner, the nozzle surface 101 is communicated with the rear die surface 100 through the cutting hole 40, the upper ejector plate 2 is fixedly connected with an ejector pin 5 arranged on the rear die surface 100 in a penetrating manner, the upper ejector plate 2 and the lower ejector plate 3 are provided with nozzle ejector pins 6 in a penetrating manner, the nozzle ejector pins 6 are arranged on the nozzle surface 101 in a penetrating manner, a movable cavity 7 is arranged between the upper ejector plate 2 and the lower ejector plate 3, one side of the ejector pin 6 is provided with a limiting platform 8 matched with the cross section shape of the movable cavity 7, the limiting platform 8 is arranged in the movable cavity 7, the depth of the movable cavity 7 and the thickness of the limiting table 8 are a and b respectively, and a is larger than b.

The specific use principle is that during injection molding, molten plastic flows onto the rear mold surface 100 after passing through the water gap mold surface 101 and the material cutting hole 40, a product 12 is formed on the rear mold surface 100, and the water gap 13 is formed on the water gap mold surface 101. The upper ejector plate 2 and the lower ejector plate 3 are pushed towards the side of the rear die core 1, the ejector pins 5 synchronously ascend along with the upper ejector plate 2 and exert upward thrust on the product 12, the product 12 moves upwards and is separated from the rear die surface 100, and the connecting part of the product 12 and the water gap 13 is cut off by the material cutting holes 40. After a certain time delay, the bottom end of the movable cavity 7 is abutted against the bottom end of the limiting table 8, and the water gap ejector pin 6 is driven to ascend and push out the water gap 13 from the water gap molded surface 101. The automatic lifting device is simple in structure and easy and convenient to operate, the water gap 13 cannot rise synchronously with the product 12 when the product 12 is ejected out, the water gap 13 is automatically cut off after a certain time delay, the water gap is cut off cleanly and cleanly, the manpower input is reduced, the production efficiency is improved, and the product quality is improved.

Based on the above embodiment, the nozzle thimble 6 includes the upper thimble 9 and the lower thimble 11, the bottom end of the upper thimble 9 is provided with the upper thimble cap 90, the bottom of the upper thimble plate 2 is provided with the first limit groove 20 in clearance fit with the upper thimble cap 90, the upper thimble cap 90 is arranged on the first limit groove 20, the upper thimble 9 is arranged between the upper thimble plate 2 and the nozzle profile 101 in a penetrating manner, the top end of the lower thimble 11 is provided with the lower thimble cap 110, the top of the lower thimble plate 3 is provided with the second limit groove 30 matched with the cross-sectional shape of the lower thimble cap 110, the lower thimble cap 110 is arranged on the second limit groove 30, the bottom end of the lower thimble 11 is arranged through the lower thimble plate 3, the depth of the second limit groove 30 and the thickness of the lower thimble cap 110 are c and d respectively, c > d, the first limit groove 20 and the second limit groove 30 are spliced to form the movable cavity 7, and the upper thimble cap 90 and the lower thimble cap 110 are spliced to form the limit platform 8. During assembly, the top end of the upper ejector pin 9 penetrates through the first limiting groove 20 and penetrates through the rear mold core 1 to extend to the water gap molded surface 101, the bottom end of the lower ejector pin 11 penetrates through the second limiting groove 30, then the upper ejector pin plate 2 and the lower ejector pin plate 3 are spliced and fixed by bolts, assembly of the water gap ejector pin 6 can be facilitated, and the water gap ejector pin 6 is easy to maintain when damaged. When the nozzle is used, the upper ejector pin plate 2 and the lower ejector pin plate 3 are pushed to ascend, when the bottom of the second limiting groove 30 is abutted to the bottom of the lower ejector pin cap 110, the lower ejector pin 11 receives upward thrust and pushes the upper ejector pin 9 to ascend, and the ascending upper ejector pin 9 ejects the nozzle 13 from the nozzle profile 101.

Based on the above embodiment, the contact surface between the nozzle profile 101 and the nozzle thimble 6 is provided with the jacking profile 102, and the jacking profile 102 is arranged in a circular truncated cone shape. During molding, molten plastic enters the jacking molded surface 102 and forms a circular truncated cone-shaped water gap, so that the holding force of the water gap molded surface 101 and the water gap 13 can be increased, the water gap 13 is prevented from being directly ejected out together when the ejector pins 5 jack up the product 12, the water gap 13 is ensured to be ejected out after being cut off, the water gap cut surface is ensured to be flat, and the product quality is improved.

Based on the above embodiment, the blanking holes 40 are arranged in a triangular prism shape. During molding, a triangular prism-shaped water gap is formed at the position of the material cutting hole 40, so that the contact area between the water gap 13 and the product 12 is reduced, and the water gap 13 is conveniently cut off.

Based on the above embodiment, the nozzle insert 4 includes the main body 41 that sets up perpendicularly and the spacing portion 42 that buckles and set up in the bottom of main body 41, and the through-hole 103 that matches with main body 41 runs through on the back mould benevolence 1 and is provided with the spacing groove 104 that matches with spacing portion 42, and main body 41 and spacing portion 42 set up respectively on through-hole 103 and spacing groove 104. When the nozzle insert 4 is assembled on the rear mold core 1, the main body 41 is inserted into the through hole 103 and pushed in, the limiting part 42 abuts against the limiting groove 104 to play a positioning role, the nozzle insert 4 is prevented from shifting when the product 12 and the nozzle 13 are jacked up, and the cutting stability of the nozzle 13 is improved.

Based on the above embodiment, the rear mold core 1 is vertically provided with the thimble hole 105 communicating with the rear mold surface 100, the thimble hole 105 is in clearance fit with the thimble 5, the thimble hole 105 is adjacent to the through hole 103, and the outlet end of the material cutting hole 40 is adjacent to the top end surface of the thimble hole 105. When the ejector pin 5 moves upwards to eject the product 12 from the rear mold surface 100, the ejector pin 5 moves upwards along the side wall of the main body part 41, and the material cutting hole 40 can cut off the water gap at the connecting surface of the water gap 13 and the product 12, so that the water gap cutting smoothness is improved, and the product attractiveness is improved.

Based on the above embodiment, the top end of the nozzle insert 4 is provided with an alignment end 43 extending out of the top end surface of the rear mold core 1, and one side of the alignment end 43 is provided with a limit inclined surface 44. The aligning groove matched with the aligning end part 43 can be arranged at the bottom of the upper die core, one side of the aligning groove is arranged on the aligning inclined plane matched with the limiting inclined plane 44, the aligning end part 43 can be inserted into the aligning groove in an aligning mode during die assembly, the guiding and positioning effect is achieved, the water gap insert 4 is prevented from being deviated during ejection, the ejection stability is improved, and the product quality is improved.

The above embodiments are merely illustrative of the preferred embodiments of the present invention, and not restrictive, and various changes and modifications to the technical solutions of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are intended to fall within the scope of the present invention defined by the appended claims.

Claims (7)

1. The automatic water gap cutting die structure is characterized by comprising a rear die core (1), an upper ejector plate (2) and a lower ejector plate (3) which are sequentially arranged from top to bottom, wherein the upper ejector plate (2) is fixedly connected with the lower ejector plate (3), a rear die surface (100) and a water gap surface (101) are arranged at the top of the rear die core (1), a water gap insert (4) is arranged on the rear die core (1) in a penetrating manner, a material cutting hole (40) is arranged on one side of the water gap insert (4) in a penetrating manner, the water gap surface (101) is communicated with the rear die surface (100) through the material cutting hole (40), an ejector pin (5) arranged on the rear die surface (100) in a penetrating manner is fixedly connected onto the upper ejector plate (2), a water gap ejector pin (6) is arranged on the upper ejector plate (2) and the lower ejector plate (3) in a penetrating manner, and the water gap ejector pin (6) is arranged on the water gap surface (101), go up thimble board (2) with be provided with movable chamber (7) down between thimble board (3), mouth of a river thimble (6) one side be provided with spacing platform (8) that activity chamber (7) cross sectional shape matches, spacing platform (8) set up in activity chamber (7), the degree of depth of activity chamber (7) with the thickness of spacing platform (8) is a, b respectively, and a > b.

2. The mold structure for automatically cutting off the water gap according to claim 1, wherein the water gap thimble (6) comprises an upper thimble (9) and a lower thimble (11), an upper thimble cap (90) is disposed at the bottom end of the upper thimble (9), a first limit groove (20) which is in clearance fit with the upper thimble cap (90) is disposed at the bottom of the upper thimble plate (2), the upper thimble cap (90) is disposed on the first limit groove (20), the upper thimble (9) is disposed between the upper thimble plate (2) and the water gap profile (101) in a penetrating manner, a lower thimble cap (110) is disposed at the top end of the lower thimble (11), a second limit groove (30) which is matched with the cross-sectional shape of the lower thimble cap (110) is disposed at the top of the lower thimble plate (3), and the lower thimble cap (110) is disposed on the second limit groove (30), lower thimble (11) bottom is run through thimble board (3) down, the degree of depth of second spacing groove (30) with the thickness of thimble cap (110) down is c, d respectively, and c > d, first spacing groove (20) with second spacing groove (30) amalgamation forms activity chamber (7), go up thimble cap (90) with thimble cap (110) amalgamation forms down spacing platform (8).

3. The structure of the automatic nozzle cutting-off die according to claim 1, wherein a jacking profile (102) is arranged at a contact surface of the nozzle profile (101) and the nozzle ejector pin (6), and the jacking profile (102) is arranged in a circular truncated cone shape.

4. The mold structure for automatically cutting off a nozzle as claimed in claim 1, wherein the cutting holes (40) are formed in a triangular prism shape.

5. The automatic nozzle cutting die structure according to claim 1, wherein the nozzle insert (4) comprises a vertically arranged main body portion (41) and a limiting portion (42) bent and arranged at the bottom end of the main body portion (41), a through hole (103) matched with the main body portion (41) is arranged on the rear die core (1) in a penetrating manner, a limiting groove (104) matched with the limiting portion (42) is arranged at the bottom end of the through hole (103), and the main body portion (41) and the limiting portion (42) are respectively arranged on the through hole (103) and the limiting groove (104).

6. The mold structure for automatically cutting off the nozzle according to claim 5, wherein an ejector pin hole (105) communicated with the rear mold surface (100) vertically penetrates through the rear mold core (1), the ejector pin hole (105) is in clearance fit with the ejector pin (5), the ejector pin hole (105) is adjacent to the through hole (103), and the outlet end of the material cutting hole (40) is adjacent to the top end surface of the ejector pin hole (105).

7. The automatic nozzle cutting die structure according to claim 6, wherein an aligning end (43) extending out of the top end surface of the rear die core (1) is arranged at the top end of the nozzle insert (4), and a limiting inclined surface (44) is arranged on one side of the aligning end (43).

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