CN111251550A

CN111251550A - Double-arc core-pulling die

Info

Publication number: CN111251550A
Application number: CN202010127432.4A
Authority: CN
Inventors: 周浪; 缪龙
Original assignee: Suzhou Yu'anjun Precision Technology Co Ltd
Current assignee: Suzhou Yu'anjun Precision Technology Co Ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-06-09

Abstract

The invention discloses a double-arc core-pulling die, which comprises: the fixed die component, the movable die component, the rack positioned in the movable die core and the gear set meshed with the rack, wherein the gear set comprises a first gear for forming a product, the rack drives the first gear to rotate, the circular arc core pulling is realized by arranging the rack and driving the first gear to rotate and be used for forming the product, the die is simple in structure and high in matching precision, the product is good in injection molding and free of defects, the requirements of the size tolerance and the appearance of a finished product even meet and exceed the requirements of a drawing, and the product is stable in volume production.

Description

Double-arc core-pulling die

Technical Field

The invention relates to a double-arc core-pulling mold.

Background

In the prior art, aiming at a product needing circular arc core pulling, the forming difficulty of the selected traditional mold is quite large, the product obtained by injection molding is generally difficult to eject and cannot meet the requirement on the product precision, so that the size precision of a finished product exceeds the tolerance range, the appearance cannot meet the drawing requirement, the final product cannot meet the requirement of a design drawing, and the reject ratio of the product is increased.

Disclosure of Invention

The invention aims to provide a die with a simple structure, which can realize double-arc core pulling.

In order to achieve the purpose, the invention provides the following technical scheme:

a double-arc core-pulling mold comprises:

the fixed die assembly comprises a fixed die base plate, a pouring gate push plate fixedly connected with the fixed die base plate and a fixed die plate fixedly connected with the pouring gate push plate, wherein a positioning ring penetrating through the fixed die base plate is arranged at the central position of the fixed die base plate;

the movable die assembly comprises a movable die base plate, cushion blocks correspondingly and vertically arranged on two sides of the movable die base plate, a base plate fixedly connected with the movable die base plate and the cushion blocks, and a movable die plate fixedly connected with the base plate, wherein the two cushion blocks, the movable die base plate and the base plate jointly enclose an accommodating space, the movable die plate is arranged in a movable die groove portion recessed towards the inside of the movable die plate from one side of the movable die plate, and the movable die assembly further comprises an ejection unit accommodated in the accommodating space and a movable die core accommodated in the movable die groove portion;

the guide component comprises a guide post fixed on the fixed die base plate and a guide sleeve sleeved on the guide post,

the double-circular-arc core-pulling die further comprises a rack located in the movable die core and a gear set meshed with the rack, the gear set comprises a first gear used for forming a product, and the rack drives the first gear to rotate.

Further, the gear set further includes a second gear and a third gear connecting the rack and the first gear.

Further, the number of the racks and the gear sets is two, and the two racks and the gear sets are oppositely arranged on two sides of a product.

Further, the double-arc core-pulling mold further comprises a sliding part located between the fixed mold plate and the movable mold plate.

Further, the slider includes a slide bar to mold a product, and a slide block connected to the slide bar.

Further, the number of the sliding parts is two, and the two sliding parts are oppositely arranged on two sides of the product.

Further, the ejection unit comprises an ejector pin push plate close to the movable mould base plate, a push plate fixing plate fixedly connected with the ejector pin push plate and an ejector pin penetrating through the push plate fixing plate and arranged towards the fixed mould component.

Furthermore, the ejection unit also comprises a directional assembly, and the directional assembly comprises a directional column and a directional sleeve arranged in the ejector pin push plate and the push plate fixing plate.

Further, ejecting unit still includes the reset unit, the reset unit includes the release link and overlaps and establish spring on the release link.

Furthermore, the movable die assembly also comprises a supporting rod which is fixed on the movable die base plate and is used for supporting the movable die plate.

The invention has the beneficial effects that: through setting up the rack and being driven by the rack and rotate and be used for the first gear of shaping product, realize the circular arc and loose core, mould simple structure and cooperation precision are high, make product injection moulding good, and be flawless, finished product dimensional tolerance and appearance requirement all reach and even exceed the drawing requirement, and product volume production is stable.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

FIG. 1 is an overall schematic view of the present invention;

FIG. 2 is a first perspective view of the present invention;

FIG. 3 is a second perspective view of the present invention;

FIG. 4 is a third perspective view of the present invention;

FIG. 5 is a fourth perspective view of the present invention;

FIG. 6 is a perspective view of the gear set, the rack, the slider, the first forming block, the second forming block, and the thimble;

fig. 7 is an exploded view of the product, the slider, the first forming block, the second forming block, and the first gear.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

The invention discloses a mold, which is used for producing a product 8 which needs an arc core pulling to eject out the mold, wherein the structure of the product 8 is designed conventionally, and is not described again.

As shown in fig. 1 to 4, the double-arc core pulling mold comprises a fixed mold component 1, a movable mold component 2, a fixed component 3 and a guide component 4, wherein the fixed mold component 1 is opposite to the movable mold component 2 and is used for being matched with a molded product 8, and the guide component 4 is used for guiding the relative positions of the movable mold component 2 and the fixed mold component 1, so that no deviation is ensured to ensure the quality of the product 8. When the double-arc core pulling mold is used for preparing a product 8, the fixed mold component 1 and the movable mold component 2 are fixed through the fixed component 3, so that the fixed mold component 1 and the movable mold component 2 are mutually closed, and the precision of the product 8 is ensured. When the double-arc core-pulling mold needs to be stored in a warehouse, the fixed mold component 1 and the movable mold component 2 can be fixed through the fixed component 3, so that the fixed mold component 1 and the movable mold component 2 are mutually closed, and the inner original of the double-arc core-pulling mold can be prevented from being damaged while the assembly precision of a product 8 is guaranteed.

Specifically, the fixed die assembly 1 comprises a fixed die base plate 10, a pouring gate push plate 11 which is positioned below the fixed die base plate 10 and is fixedly connected with the fixed die base plate 10, and a fixed die plate 12 which is positioned below the pouring gate push plate 11 and is fixedly connected with the pouring gate push plate 11. A positioning ring 13 penetrating through the fixed mold base plate 10 is arranged at the center of the fixed mold base plate 10, a sprue 14 corresponding to the center of the positioning ring 13 and a fixed mold groove (not shown) recessed from one side of the fixed mold plate 12 to the inside of the fixed mold plate 12 are arranged on the fixed mold plate 12, and the fixed mold component 1 further comprises a fixed mold core 15 accommodated in the fixed mold groove. The positioning ring 13 corresponds to a turret on the injection molding machine in position and is used for guiding the turret to enable the injection molding machine to accurately inject the rubber material into the double-arc core-pulling mold, and the pouring gate 14 is used for guiding the injection molding rubber material to enter the inside of the double-arc core-pulling mold.

The movable mould component 2 comprises a movable mould base plate 20, cushion blocks 21 and fixed connection blocks, wherein the cushion blocks are correspondingly and vertically arranged on two sides of the movable mould base plate 20, the movable mould base plate 20 is fixedly connected with a base plate 22 of the cushion block 21 and a movable mould plate 23 of the base plate 22, and the cushion blocks 21, the movable mould base plate 20 and the base plate 22 jointly enclose a containing space. The movable mold assembly 2 further comprises 4 support rods 24 accommodated in the accommodating space and fixed on the movable mold base plate 20, and the support rods 24 are used for supporting the movable mold plate 23 and preventing the movable mold plate 23 from deforming. And a movable mold recess (not shown) in which the movable mold plate 23 is recessed from the movable mold plate 23 side toward the inside of the movable mold plate 23. The movable mold assembly 2 further comprises an ejection unit accommodated in the accommodating space and a movable mold core 231 accommodated in the groove portion of the movable mold. The movable mold base plate 20, the cushion block 21 and the movable mold plate 23 are sequentially arranged from bottom to top, and the fixed mold base plate 10 and the fixed mold plate 12 are sequentially arranged from top to bottom, so that the fixed mold component 1 and the movable mold component 2 can be relatively matched.

The ejection unit comprises an ejector pin push plate 25 arranged close to the movable mold base plate 20, a push plate fixing plate 26 fixedly connected with the ejector pin push plate 25, and an ejector pin 27 penetrating through the push plate fixing plate 26 and arranged towards the fixed mold assembly 1. An ejector rod (not shown) is arranged on the injection molding machine, an ejector rod through hole (not shown) matched with the ejector rod is arranged on the movable mold base plate 20, the ejector rod penetrates through the ejector rod through hole and is abutted against the ejector pin push plate 25, and therefore when the injection molding machine pushes the ejector rod, the ejector rod is pushed and sequentially pushes the ejector pin push plate 25 and the push plate fixing plate 26 to move together along the movement direction of the ejector rod. The ejector plate fixing plate 26 and the ejector plate 25 also together define one end of the ejector pin 27, so that the ejector pin 27 can be pushed by the ejector pin to move toward the fixed mold assembly 1. The ejector pin 27 is matched with the injection-molded product 8, and can eject the product 8 from the movable mold core 231 after the double-arc core-pulling mold is opened. The ejection unit further comprises an orientation assembly 29 penetrating through the ejector pin push plate 25 and the push plate fixing plate 26, and the orientation assembly 29 comprises an orientation column 291 and an orientation sleeve 292 arranged in the ejector pin push plate 25 and the push plate fixing plate 26. The number of the directional columns 291 is 4, the directional columns 291 are uniformly distributed at the corners of the movable mold base plate 20, one end of each directional column 291 is clamped in the movable mold base plate 20, and the other end of each directional column 291 can freely extend into the movable mold plate 23. When the ejector rod is pushed and pushes the ejector pin push plate 25 and the push plate fixing plate 26 to move together along the movement direction of the ejector rod in turn, the orientation component 29 fixes the ejector pin push plate 252 and the push plate fixing plate 26 to move simultaneously.

The ejection unit further comprises a reset unit 28, the reset unit 28 comprises a reset rod 281 and springs 282 sleeved on the reset rod 281, the number of the reset rod 281 and the number of the springs 282 are set to be 4, and the springs are uniformly distributed on 4 corners of the push plate fixing plate 26. Reset lever 281 one end is spacing be in between push pedal fixed plate 26 and the thimble push pedal 25, the other end can be free run through movable mould board 23 and with the fixed die plate 12 butt, the reset lever centers on the thimble 27 sets up, consequently reset lever 281 can lead push pedal fixed plate 26, thimble push pedal 25 and thimble 27 avoid thimble 27 to remove crooked and receive the damage. When the ejector pins 27 eject the products 8, the reset rods assist in pushing the fixed die plate 12. The spring 282 has a portion that extends into the movable die plate 23 to limit the position of the spring relative to the movable die plate 23, and another portion that protrudes from the movable die plate 23 and abuts against the push plate fixing plate 26. When the double-arc core-pulling mold is opened, the ejector pins 27 are pushed out by ejector pins of the injection molding machine, the product 8 is taken out, the ejector pins return, the ejector units are reset by the elastic force of the springs 282, and the double-arc core-pulling mold is closed. However, when the spring 282 fails or the reset fails due to an external reason, the double-arc core-pulling mold is clamped, and the reset rod 281 can directly abut against the fixed mold plate 12, so that the ejector pin 27 is prevented from being directly acted by the clamping force, and the ejector pin 27 is protected from being damaged.

Referring to fig. 5 and 6, in the embodiment, the number of the movable mold cores 231 is 2, a space (not shown) is formed between two movable mold cores 231, and the product 8 is molded in the space. The double-circular-arc core-pulling mold further comprises a rack 51 positioned in the movable mold cores 231 and a gear set meshed with the rack 51, specifically, the rack 51 and the gear set are positioned in a space formed between the two movable mold cores 231, the gear set comprises a first gear 52 used for forming a product 8 and a second gear 53 and a third gear 54 used for forming the rack 51 and the first gear 52, the second gear 53 is meshed with the third gear 54, the second gear 53 is meshed with the first gear 52, the third gear 54 is meshed with the rack 51, and the rack 51 drives the first gear 52 to rotate by driving the second gear 53 and the third gear 54. The first gear 52 is a half gear, and the movement of the position thereof is changed by the rotation of the first gear 52. The number of the racks 51 and the gear sets is two, and the two racks 51 and the two gear sets are oppositely arranged on two sides of the product 8.

Referring to fig. 7, the double-arc core-pulling mold further includes a sliding member 6 located between the fixed mold plate and the movable mold plate. The slider 6 includes a slide bar 61 for molding the product 8, and a slide block 62 connected to the slide bar 61. The number of the sliding parts 6 is two, and the two sliding parts 6 are oppositely arranged at two sides of the product 8.

A first forming block 71 is provided below the product 8 and a second forming block 72 is provided above the product 8, the first and second forming blocks being used to form the product 8. The first molding block 71, the second molding block 72, the two sliding rods 61 and the two first gears 52 enclose a molding cavity for molding the product 8.

The working principle of the double-arc core pulling is as follows: when the mold is opened, the two racks 51 move upwards, and meanwhile, the sliding piece 6 slides towards the direction away from the product 8, wherein the position of the fixed mold component 1 is defined to be upper, the position of the movable mold component 2 is defined to be lower, the two racks 51 move to respectively drive the third gear 54 meshed with the racks to rotate, the third gear 54 drives the second gear 53 meshed with the third gear, the second gear 53 drives the corresponding first gear 52 to rotate, the rotation of the two first gears 52 realizes double-arc core pulling, so that the double-arc core pulling is away from the product 8 and is separated from the product 8, and the thimble pushes upwards and ejects the product 8.

In the invention, when the gun platform of the injection molding machine injects materials into the cavity through the gate 14, the product 8 can be molded, the rack 51 drives the first gear 52 to realize double-arc core pulling, and then the ejection unit ejects the product 8, so that the whole injection molding process is completed.

In order to make the formed product 8 cool off the shaping fast and keep whole biarc loose core mould temperature invariant, still be provided with circulation water route 9 in the biarc loose core mould, circulation water route 9 centers on the shaping die cavity sets up, and is concrete, in order to guarantee the quality of product 8, is provided with a circulation water route 9 in the fixed die plate 12 of the top of shaping die cavity, sets up two circulation water routes 9 in the movable die plate 23 of the below of shaping die cavity relatively.

The guide assembly 4 includes a guide post 41 and a guide sleeve 42 sleeved on the guide post. The number of the guide columns 41 is 4, the guide columns are uniformly distributed at 4 corners of the fixed die base plate 10 and are limited between the fixed die base plate 10 and the injection molding machine. One end of the guide post 41 is clamped in the fixed mold base plate 10, and the other end of the guide post can freely extend into the cushion block 21. The fixed die component 1 and the movable die component 2 are both provided with guide sleeves 42, and the guide sleeves 42 are correspondingly matched with the guide pillars 41 and are uniformly distributed on 4 corners of the fixed die plate 12 and the movable die plate 23. When the double-arc core-pulling mold is opened, the guide pillar 41 is separated from the guide sleeve 42 in the movable mold plate 23, the movable mold component 2 is far away from the fixed mold component 1, when the double-arc core-pulling mold is closed, the guide pillar 41 penetrates the guide sleeve 42 in the movable mold plate 23, and the movable mold component 2 and the fixed mold component 1 form a cavity for molding double-arc core pulling.

The fixed assembly 3 comprises a fixed block 31 and a fixed strip 32, the fixed block 31 fixes the fixed die plate 12, the backing plate 22 and the movable die plate 23 together, and the fixed strip 32 fixes the fixed die assembly 1, the backing plate 22 and the movable die plate 23 together, so that the relative position of the fixed die assembly 1 and the movable die assembly 2 is ensured to be unchanged.

A plurality of standing legs 100 are provided on an opposite surface of the side provided with the fixing component 3, the standing legs 100 are used for protecting the mold, and the number of the standing legs 100 is 4, but may be other numbers, and is not limited herein.

The invention has the beneficial effects that: through setting up rack 51 and being driven by rack 51 and rotate and be used for the first gear 52 of shaping product 8, realize the circular arc and loose core, mould simple structure and cooperation precision are high, make product 8 injection moulding good, and be flawless, finished product dimensional tolerance and appearance requirement all reach and even exceed the drawing requirement, and 8 volume productions of product are stable.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A double-arc core-pulling mold comprises:

the double-arc core-pulling die is characterized by further comprising a rack located in the movable die core and a gear set meshed with the rack, wherein the gear set comprises a first gear used for forming a product, and the rack drives the first gear to rotate.

2. The double-arc core pulling mold according to claim 1, wherein the gear set further comprises a second gear and a third gear that connect the rack and the first gear.

3. The double-arc core pulling mold as claimed in claim 2, wherein the number of the racks and the gear sets is two, and the two racks and the gear sets are oppositely arranged on two sides of a product.

4. The double arc core pulling mold according to claim 1, further comprising a sliding member located between the fixed platen and the movable platen.

5. The double-arc core pulling mold according to claim 3, wherein the sliding member includes a sliding rod for molding the product, and a sliding block connected to the sliding rod.

6. The double-arc core pulling die as claimed in claim 4, wherein the number of the sliding members is two, and the two sliding members are oppositely arranged on two sides of the product.

7. The double-arc loose core die according to claim 1, wherein the ejection unit comprises an ejector pin push plate arranged close to the movable die base plate, a push plate fixing plate fixedly connected with the ejector pin push plate, and an ejector pin penetrating through the push plate fixing plate and arranged towards the fixed die assembly.

8. The ceramic tube mold of claim 7, wherein the ejection unit further comprises an orientation assembly, the orientation assembly comprising an orientation post and an orientation sleeve disposed within the ejector push plate and the push plate retainer plate.

9. The double-arc core pulling mold according to claim 8, wherein the ejection unit further comprises a reset unit, and the reset unit comprises a reset rod and a spring sleeved on the reset rod.

10. The double arc core pulling mold as claimed in claim 1, wherein the movable mold assembly further comprises a support rod fixed to the movable mold base plate for supporting the movable mold platen.