Foam forming mold for carbon fiber propeller

Abstract

The utility model discloses a carbon fiber propeller foam forming mold which comprises an upper mold and a lower mold, positioning holes are formed in the four corners of the lower mold, a mounting groove is formed in the lower mold, a lower baffle is arranged at the bottom of the mounting groove, a profiled groove is formed in the lower baffle, a vacuum groove is formed outside the lower baffle, and an exhaust hole is formed in the bottom of the vacuum groove. An extraction opening is formed in the side wall of the lower die; positioning pins are arranged at the four corners of the upper die, an upper baffle corresponding to the lower baffle is arranged at the bottom of the upper die, when the upper die is matched with the lower die, an internal space defined by the upper baffle, the lower baffle and the profile groove is called as a profile cavity, an external space defined by the upper baffle, the lower baffle and the vacuum groove is called as a vacuum cavity, and a gap is formed between the upper baffle and the lower baffle; the cavity is communicated with the vacuum cavity; the mold is communicated with the vacuum cavity on the outer side of the mold cavity, under the dual effects of temperature and vacuum, the time for expansion forming of the foaming material is shortened, bubbles generated during foaming can move towards the vacuum cavity, the core material is discharged, and the production quality of the core material is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to propeller mould equipment field, especially a carbon fiber propeller foaming forming mould. BACKGROUND

[0002] Propeller refers to the blade in air or water rotation, the device of the rotating power conversion of engine into propulsive force, the performance of propeller can decide the efficiency of power conversion, in order to improve the strength, rigidity, quality, etc. of propeller, the carbon fiber propeller of sandwich structure is designed. The core material of this propeller adopts foaming material, because the processing technology of foaming material and carbon fiber is different, so needs to be processed separately, the traditional foaming forming mould is closed due to the cavity, so that the forming process of foaming material is not controlled, and the foaming material expands the time of forming, and the foaming material is also easy to appear bubble in the forming core material, influence the production quality of core material. UTILITY MODEL CONTENTS

[0003] The utility model discloses a kind of carbon fiber propeller foaming forming mould, the vacuum cavity is communicated in cavity outside of the mould, under the double action of temperature and vacuum, foaming material expands the use time of forming is shortened, and bubble generated when foaming will move to vacuum cavity, to discharge core material, improve the production quality of core material.

[0004] To achieve the above object, the utility model adopts the following technical scheme: a kind of carbon fiber propeller foaming forming mould, including upper die and lower die, positioning hole is set in the four corners of lower die, installation slot is set in lower die, the bottom of installation slot is provided with tail-to-tail lower baffle, the inside of lower baffle is the shape groove matched with propeller, the outside of baffle is vacuum groove, the bottom of vacuum groove is provided with exhaust hole, the sidewall of lower die is provided with exhaust port being communicated with exhaust hole;The four corners of upper die are provided with the positioning pin matched with positioning hole, the bottom of upper die is provided with the upper baffle corresponding with lower baffle, when upper die and lower die cooperate, the internal space surrounded by upper baffle, lower baffle and shape groove is called cavity, the external space surrounded by upper baffle, lower baffle and vacuum groove is called vacuum cavity, interval is provided between upper baffle and lower baffle, and cavity is communicated with vacuum cavity.

[0005] Optionally, the edge of upper die is provided with sealing strip.

[0006] Optionally, the bottom of upper die is provided with boss matched with installation slot, and the upper baffle is arranged on the boss.

[0007] Optionally, the outer periphery of boss is also provided with sealing strip.

[0008] Optionally, the exhaust hole is provided with two, and the two are symmetrically arranged on the vacuum groove, and the exhaust port corresponding with the exhaust hole is also provided with two.

[0009] The carbon fiber propeller foaming forming die has the following advantages:

[0010] (1) The core material plate for foaming is placed in the groove, the gap is left between the upper baffle and the lower baffle after the upper die and the lower die are matched, the cavity and the vacuum cavity are communicated through the gap, then the upper die is pressed by the press, the tightness of the connection between the upper die and the lower die is ensured, the die is heated again, the core material plate is foamed, the air is extracted outward through the air extraction port at the same time of heating, the negative pressure environment in the vacuum cavity and the cavity is maintained. Under the double action of temperature and negative pressure, the foaming process of the core material plate can be shortened, the bubbles generated during foaming can be discharged from the gap between the upper baffle and the lower baffle, and the production quality of the core material is ensured.

[0011] (2) The convex platform is matched with the mounting groove, the upper die and the lower die are matched conveniently, and the establishment of the vacuum cavity is also facilitated.

[0012] (3) The two exhaust holes make the negative pressure in the vacuum cavity more balanced and stable, and are beneficial to the foaming and forming of the core material plate. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is a structural schematic view of the lower die.

[0014] Fig. 2 is a structural schematic view of the upper die. DETAILED DESCRIPTION

[0015] The utility model will be further explained in connection with the drawings.

[0016] As Figs. 1-2As shown, a carbon fiber propeller foaming forming die comprises an upper die 1 and a lower die 2, the lower die 2 is provided with positioning holes 3 at four corners, the lower die 2 is provided with mounting grooves 4, the bottom of the mounting grooves 4 is provided with tail-to-tail lower baffles 5, the inside of the lower baffles 5 is a type groove 6 matched with the shape of the propeller, the outside of the baffles is a vacuum groove 7, the bottom of the vacuum groove 7 is provided with two symmetrically arranged exhaust holes 8, the sidewall of the lower die 2 is provided with an air exhaust port 9 communicated with the exhaust holes 8. The upper die 1 is provided with positioning pins 10 matched with the positioning holes 3 at four corners, the positioning pins 10 are connected with the positioning holes 3, facilitating accurate cooperation of the upper die 1 and the lower die 2, the bottom of the upper die 1 is provided with bosses 11 matched with the mounting grooves 4, the bottom of the bosses 11 is provided with upper baffles 12 corresponding to the lower baffles 5, the inside of the upper baffles 12 is also a type groove 6 matched with the shape of the propeller. The edge of the upper die 1 and the outer periphery of the bosses 11 are both provided with sealing strips 13, ensuring the tightness of the connection of the upper die 1 and the lower die 2, which is conducive to the establishment of a negative pressure environment. When the upper die 1 cooperates with the lower die 2, the inside space surrounded by the upper baffles 12, the lower baffles 5, the bosses 11 and the type groove 6 is called a cavity, the outside space surrounded by the upper baffles 12, the lower baffles 5, the bosses 11 and the vacuum groove 7 is called a vacuum cavity, and a gap is arranged between the upper baffles 12 and the lower baffles 5, and the cavity is communicated with the vacuum cavity.

[0017] When the die is used, the core material plate is placed into the lower baffles 5, then the upper die 1 is buckled on the lower die 2, the positioning pins 10 cooperate with the positioning holes 3, the bosses 11 cooperate with the mounting grooves 4, the accuracy and sealing property of the die closing of the upper die 1 and the lower die 2 are ensured, then a press is pressed on the top of the upper die 1 to avoid the upper die 1 being opened up during foaming, finally the die is heated to make the core material plate start foaming, at the same time, an air exhaust device is connected to the air exhaust port 9 to establish a negative pressure environment in the cavity and the vacuum cavity, under the dual action of negative pressure and temperature, the foaming time is shorter and the efficiency is higher, and the bubbles generated during foaming will move to the negative pressure environment, so that the structure of the foaming body is uniform and the quality is stable.

[0018] The above-described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present application.

Claims

1. A carbon fiber propeller foam molding mold characterized by: The die set comprises an upper die and a lower die, the lower die is provided with positioning holes at four corners, the lower die is provided with an installation groove, the bottom of the installation groove is provided with a lower baffle connected at both ends, the inside of the lower baffle is a type groove matched with the shape of a propeller, the outside of the lower baffle is a vacuum groove, the bottom of the vacuum groove is provided with an exhaust hole, the sidewall of the lower die is provided with an air exhaust port communicated with the exhaust hole; the upper die is provided with positioning pins matched with the positioning holes at four corners, the bottom of the upper die is provided with an upper baffle corresponding to the lower baffle, when the upper die and the lower die are matched, the inside space surrounded by the upper baffle, the lower baffle and the type groove is called a cavity, the outside space surrounded by the upper baffle, the lower baffle and the vacuum groove is called a vacuum cavity, a space is arranged between the upper baffle and the lower baffle, and the cavity and the vacuum cavity are communicated.

2. The carbon fiber propeller foam molding mold according to claim 1, characterized by: The edge of the upper die is provided with a sealing strip.

3. The carbon fiber propeller foam molding mold according to claim 1, characterized by: The bottom of the upper die is provided with a boss matched with the installation groove, and the upper baffle is arranged on the boss.

4. The carbon fiber propeller foam molding mold according to claim 3, characterized by: The outer periphery of the boss is also provided with a sealing strip.

5. The carbon fiber propeller foam molding mold according to claim 1, characterized by: The exhaust hole is provided with two exhaust holes, which are symmetrically arranged on the vacuum groove, and the air exhaust port corresponding to the exhaust hole is also provided with two air exhaust ports.

Images