CN219171743U

CN219171743U - Composite material special-shaped part hot-pressing die

Info

Publication number: CN219171743U
Application number: CN202320113932.1U
Authority: CN
Inventors: 金石磊; 张学伍; 李小慧; 刘艳; 李秋彤; 马峰岭; 聂婭; 段家真; 张亦钦
Original assignee: Shanghai Material Research Institute Co ltd
Current assignee: Shanghai Material Research Institute Co ltd
Priority date: 2023-01-16
Filing date: 2023-01-16
Publication date: 2023-06-13
Anticipated expiration: 2033-01-16

Abstract

The utility model relates to a composite material special-shaped part hot-pressing die which comprises an upper die, a middle die, a core die, an ejection die and a lower supporting die which are sequentially arranged from top to bottom, wherein the middle die is provided with a forming cavity which is penetrated up and down, the middle part of the upper die is pressed into the forming cavity and seals the forming cavity, the upper surface of the core die is provided with a forming die cavity which can be sealed and extend into the forming cavity, the middle part of the core die is also provided with a hollow part which is penetrated up and down, the upper surface of the ejection die is provided with an ejection bump which is matched with the hollow part in a sliding way, and the upper die and the ejection die are detachably connected through a fixed connecting device. The composite material hot-pressing die disclosed by the utility model is simple in structure, the quick demolding of a multi-cavity product can be realized by utilizing the structural design of the ejection die and the mechanical fixation of the upper pressing die, the product cannot be damaged, and the product can be prepared by adopting a common single-cylinder hot press or a vulcanizing machine, so that the requirement on equipment is reduced.

Description

Composite material special-shaped part hot-pressing die

Technical Field

The utility model belongs to the technical field of die manufacturing, and relates to a composite material special-shaped part hot-pressing die.

Background

Compression molding is an important molding mode for molding composite materials, and is mainly used for molding thermosetting plastic products, in particular to fiber reinforced resin composite materials. For a composite material product with a multi-cavity special-shaped structure, demolding is a key step in a molding process, a demolding mechanism is usually arranged in a mold structure, the existing demolding mechanism is generally positioned at the bottommost part in the mold, after hot pressing is finished, a lower ejection cylinder of molding equipment is utilized to eject the demolding mechanism so as to eject a product out of a mold cavity, and the demolding mechanism generally needs to use a hydraulic press with a lower ejection cylinder.

The composite material compression molding generally needs to be heated to a certain temperature to solidify the resin in the mold, if a hydraulic press with a lower ejection cylinder is adopted, a heating rod cannot be installed on a lower pressing plate of the hydraulic press, and then the mold itself needs to be provided with the heating rod or a hot runner, so that the complexity of the mold is increased, and meanwhile, the molding difficulty and the mold cost are also increased.

Disclosure of Invention

The utility model aims to provide a composite material special-shaped part hot-pressing die which is simple in structure and self-provided with a stripping structure, and can realize stripping by using a single-cylinder hydraulic machine.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides a combined material dysmorphism spare hot pressing die, includes from the top down in proper order last moulding-die, well mould, mandrel, ejection mould and lower support mould, well mould has the shaping cavity that link up from top to bottom, go up the mid portion of moulding-die and impress in the shaping cavity, and seal shaping cavity, the mandrel upper surface then processing has can seal to stretch into shaping die cavity in the shaping cavity, the middle part of mandrel still processing has the fretwork portion that link up from top to bottom, the upper surface of ejection mould then processing has the slip to match the ejection lug of fretwork portion, go up the moulding-die with ejection mould still can dismantle through fixed connection device and be connected.

Further, the fixing and connecting device comprises an upper screw and a lower screw which are respectively connected with the tops of the upper pressing die and the ejection die, and a connecting piece for mechanically fixing the upper screw and the lower screw.

Further, an upper threaded hole matched with the upper screw is formed in the side portion of the upper pressing die.

Further, a lower threaded hole matched with the lower screw is formed in the side portion of the ejection die.

Furthermore, the connecting piece is mechanically and fixedly connected with the upper screw and the lower screw respectively through welding, bonding, riveting, threads, magnetic attraction or a chain.

Further, the height of the ejection protruding block is higher than the depth of the hollowed-out portion.

Furthermore, the hollowed-out part is cross-shaped.

Further, a chute along the up-down direction is processed on the lower supporting die, and the ejection die is placed in the chute and can move up and down along the chute.

Further, during molding, the upper surface of the ejection protruding block is flush with the upper surface of the hollowed-out part.

Further, an exhaust groove is also arranged on the ejection die.

Compared with the prior art, the utility model realizes convenient and quick demoulding by utilizing the fixing and separating of the upper pressing die and the ejection die according to the technological requirement period on the premise of not damaging the product, can prepare the product by adopting a common single-cylinder hot press or a vulcanizing machine, and reduces the structural complexity of the die and the requirement on equipment.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of a hot press mold during closing;

FIG. 3 is a schematic view of a hot press die when the fixed connection device is connected;

the figure indicates:

1-upper pressing mold; 2-middle mold; 3-core mold; 4-ejecting the die; 5-lower supporting die; 61-forming a cavity; 62-forming a die cavity; 71-screwing; 72-connecting piece; 73-lower screw.

Detailed Description

The utility model will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical scheme of the present utility model, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present utility model is not limited to the following examples.

In the following embodiments or examples, unless otherwise specified, functional components or functional structures are indicated as conventional components or conventional structures employed in the art to achieve the corresponding functions.

The utility model provides a hot-pressing die capable of realizing demoulding by using a single-cylinder hydraulic machine, which has a simple structure, and can be used for realizing demoulding by taking a demoulding structure as shown in figures 1-3, and comprises an upper pressing die 1, a middle die 2, a core die 3, an ejection die 4 and a lower supporting die 5 which are sequentially arranged from top to bottom, wherein the middle die 2 is provided with a forming cavity 61 which is penetrated up and down, the middle part of the upper pressing die 1 is pressed into the forming cavity 61 and seals the forming cavity 61, the upper surface of the core die 3 is provided with a forming cavity 62 which can be sealed and extend into the forming cavity 61, the middle part of the core die 3 is also provided with a hollow part which is penetrated up and down, the upper surface of the ejection die 4 is provided with an ejection bump which is matched with the hollow part in a sliding way, and the upper pressing die 1 and the ejection die 4 are detachably connected through a fixed connecting device.

In some embodiments, the fixing and coupling means includes upper and

lower screws

71 and 73 coupled to the tops of the upper and lower molds 1 and 4, respectively, and a coupling member 72 for mechanically fixing the upper and

lower screws

71 and 73.

Further, the side portion of the upper die 1 is formed with an upper screw hole which is matched with the upper screw 71.

Further, a lower screw hole is formed in a side portion of the ejector die 4 to be matched with the lower screw 73.

Further, the connecting member 72 is mechanically and fixedly connected to the upper screw 71 and the lower screw 73 by welding, bonding, riveting, threading, magnetic attraction or a chain, respectively.

In some specific embodiments, the height of the ejection bump is higher than the depth of the hollowed-out portion.

In some specific embodiments, the hollowed-out portion is cross-shaped.

In some specific embodiments, a chute is formed on the lower support die 5 in the up-down direction, and the ejector die 4 is placed in the chute and can move up and down along the chute.

In some specific embodiments, the upper surface of the ejection bump is flush with the upper surface of the hollowed-out portion during molding.

In some embodiments, the ejector die 4 is further provided with a vent groove.

The above embodiments may be implemented singly or in any combination of two or more.

The above embodiments are described in more detail below in connection with specific examples.

Examples:

in order to provide a hot-pressing die with a simple structure and a self-demolding structure, and capable of realizing demolding by using a single-cylinder hydraulic press, the embodiment provides a hot-pressing die for a special-shaped piece made of a composite material, the structure of the hot-pressing die is shown in fig. 1 to 3, the hot-pressing die comprises an upper pressing die 1, a middle die 2, a core die 3, an ejection die 4 and a lower supporting die 5 which are sequentially arranged from top to bottom, the middle die 2 is provided with a forming cavity 61 which is penetrated up and down, the middle part of the upper pressing die 1 is pressed into the forming cavity 61 and seals the forming cavity 61, the upper surface of the core die 3 is provided with a forming cavity 62 which can be sealed and extend into the forming cavity 61, the middle part of the core die 3 is also provided with a hollow part which is penetrated up and down, the upper surface of the ejection die 4 is provided with an ejection bump which is matched with the hollow part in a sliding way, and the upper pressing die 1 and the ejection die 4 are also detachably connected through a fixed connecting device.

The fixing and connecting means includes upper and

lower screws

71 and 73 connected to the tops of the upper and lower molds 1 and 4, respectively, and a connecting member 72 for mechanically fixing the upper and

lower screws

71 and 73. The side portion of the upper die 1 is machined with an upper screw hole that mates with the upper screw 71. The side portion of the ejector die 4 is machined with a lower screw hole that matches the lower screw 73. The connecting piece 72 is mechanically and fixedly connected with the upper screw 71 and the lower screw 73 through welding, bonding, riveting, threading, magnetic attraction or a chain, and a connecting belt can be adopted for the connecting piece 72 in the embodiment.

The height of the ejection protruding block is higher than the depth of the hollowed-out part, and the hollowed-out part is cross-shaped. The lower supporting die 5 is provided with a chute along the up-down direction, and the ejection die 4 is arranged in the chute and can move up and down along the chute. And in the forming process, the upper surface of the ejection lug is flush with the upper surface of the hollowed-out part. The ejection die 4 is also provided with an exhaust groove.

During molding, the upper pressing die 1, the middle die 2, the core die 3, the ejection die 4 and the lower supporting die 5 are sequentially placed on a table top of a hydraulic press, the upper pressing die 1 is fixed on an upper pressing plate of the hydraulic press in a mechanical fixing mode, the temperature is raised to a required process temperature, then the upper pressing plate of the hydraulic press is opened, materials are filled into the molding cavity 61 and the molding cavity 62 according to the feeding amount, the upper pressing die 1 is pressurized along with the upper pressing plate of the hydraulic press, the materials uniformly flow into the molding cavity, cooling is carried out after the pressure is maintained for a certain time according to the process, after the dies are cooled, the fixed connecting device is arranged on screws of the upper pressing die 1 and screws of the lower pressing die, the upper pressing plate of the hydraulic press is opened, at the moment, the ejection die 4 is lifted along with the upper pressing die 1, so that a product is ejected, after the product is ejected out of the molding cavity 61, the upper pressing die 1 is lifted continuously, the upper pressing die 1 is opened along with the upper pressing plate of the press, and then the product is taken out.

The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present utility model. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present utility model is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present utility model.

Claims

1. The utility model provides a combined material dysmorphism spare hot pressing die, its characterized in that includes upper die, well mould, mandrel, ejecting mould and the lower mould that from the top down arranged in proper order, well mould has the shaping cavity that link up from top to bottom, the mid portion of upper die is impressed in the shaping cavity, and seals shaping cavity, the mandrel upper surface then processes has can seal to stretch into shaping die cavity in the shaping cavity, the middle part of mandrel still processes has the fretwork portion that link up from top to bottom, the upper surface of ejecting mould then processes has the slip to match the ejecting lug of fretwork portion, the upper die with ejecting mould still can dismantle through fixed connection device and be connected.

2. A composite profiled part hot-pressing die as claimed in claim 1, wherein the fixing and connecting means comprises upper and lower screws connected to the tops of the upper and lower pressing dies, respectively, and a connecting member for mechanically fixing the upper and lower screws.

3. A composite profile hot-pressing die as claimed in claim 2, wherein the side portion of the upper pressing die is machined with an upper threaded hole matching the upper screw.

4. The composite profile hot-pressing die as claimed in claim 2, wherein a side portion of the ejector die is machined with a lower screw hole matched with the lower screw.

5. The composite profile hot-pressing die as claimed in claim 2, wherein the connecting member is mechanically and fixedly connected to the upper screw and the lower screw by welding, bonding, riveting, threading, magnetic attraction or a chain, respectively.

6. The composite material special-shaped part hot-pressing die according to claim 1, wherein the height of the ejection protruding block is higher than the depth of the hollowed-out part.

7. The composite profile hot-pressing die as claimed in claim 1, wherein the hollowed-out portion is cross-shaped.

8. The composite material special-shaped part hot-pressing die according to claim 1, wherein a chute along the up-down direction is formed on the lower supporting die, and the ejection die is placed in the chute and can move up and down along the chute.

9. The composite material special-shaped part hot-pressing die according to claim 1, wherein the upper surface of the ejection bump is flush with the upper surface of the hollowed-out part during molding.

10. The composite profile hot-pressing die as claimed in claim 1, wherein the ejector die is further provided with an air vent.