Die for measuring hot-pressing fluidity of composite material

Abstract

The utility model relates to a die for measuring the hot-pressing fluidity of a composite material. The problems that in the prior art, a hot-pressing fluidity testing mold is difficult to accurately reflect the flow characteristics of a composite material during actual forming of parts with complex shapes, the operation is not convenient enough, and the cost is high are solved. The mold comprises a box-shaped mold body, a groove structure arranged in a crossed mode is arranged at the upper end of the mold body, the lower end of the mold body is connected with an ejector pin assembly located at the bottom of the groove structure through a driving guide mechanism, and a flow guide mechanism communicated with the groove structure is arranged on the outer wall of the periphery of the mold body. One end, communicated with the groove, of the flow guide mechanism can be opened and closed through a sealing plug. The device has the advantages of being capable of accurately reflecting the flow characteristics of the composite material during actual forming of parts with complex shapes, convenient to operate, low in cost and beneficial to improving the development efficiency of the materials and the parts and reducing the development cost.

Description

Technical Field

[0001] The utility model relates to the technical field of hot pressing detection, in particular to a mold for measuring the hot pressing fluidity of composite materials. Background Art

[0002] For composite materials formed by hot pressing, which are usually fiber-reinforced thermosetting or thermoplastic resin composite materials, their forming fluidity is often measured by the penetration test method or directly by trial production with part molds. When the existing hot pressing molds detect the hot pressing fluidity of materials, due to the relatively narrow heating temperature window area, if the temperature is too low, it is easy to cause poor fluidity and large internal stresses are generated inside the material, thus affecting the product quality. In addition, the data of the existing penetration test method often cannot reflect the true fluidity of the material during actual part forming, and the method of directly using part molds for trial production often can only be carried out in the later stage of material and part development. It can be seen that the existing hot pressing fluidity test methods are difficult to accurately reflect the flow characteristics of composite materials during the forming of actual complex-shaped parts, and the operation is not convenient enough and the cost is high.

[0003] In order to solve the deficiencies of the existing technology, people have carried out long-term explorations and proposed various solutions. For example, a Chinese patent document discloses a hot pressing forming sealed box body for polyether ether ketone resin composite materials [CN201721883470.2], which includes a sealed box body; the sealed box body includes a front panel, a rear panel, an upper top panel and a lower top panel; an openable sealed door is arranged on the front panel of the sealed box body, the sealed door is fixed on the front panel through a hinge arranged on one side, and the other three sides of the sealed door are all fixed on the front panel through lock catches, and a nitrogen injection port and an exhaust port are arranged on the rear panel.

[0004] The above solution solves to a certain extent the problem that the fluidity is poor and affects the product quality when the existing hot pressing molds detect the hot pressing fluidity of materials, but this solution still has many deficiencies. For example, it is difficult to accurately reflect the flow characteristics of composite materials during the forming of actual complex-shaped parts, and the operation is not convenient enough and the cost is high. Summary of the Invention

[0005] The purpose of the utility model is to provide a mold for measuring the hot pressing fluidity of composite materials for the above problems.

[0006] To achieve the above object, the utility model adopts the following technical solutions: A mold for measuring the hot pressing fluidity of composite materials, including a mold body in a box shape, with a groove structure arranged in a cross shape at the upper end of the mold body. The lower end of the mold body is connected to a thimble assembly located at the bottom of the groove structure through a driving and guiding mechanism, and a diversion mechanism communicating with the groove structure is arranged on the outer wall around the mold body. One end of the diversion mechanism communicating with the groove is openable and closable through a sealing plug.

[0007] In the above mold for measuring the hot pressing fluidity of composite materials, a side wall mold cavity is arranged at the top of the side wall around the mold body. The side wall mold cavity communicates with the groove structure and is arranged in a communicating manner on the upper end surface of the mold body.

[0008] In the above mold for measuring the hot pressing fluidity of composite materials, the width range of the side wall mold cavity is 1.5 - 10 MM, and the ratio of the depth to the width of the side wall mold cavity is 10.1:1 - 50:1.

[0009] In the above mold for measuring the hot pressing fluidity of composite materials, the groove structure includes a cross-shaped groove arranged on the upper end surface of the mold body. A flow dividing partition is arranged in the cross-shaped groove, and a hot pressing base is formed between the cross-shaped grooves on the upper end surface of the mold body.

[0010] In the above mold for measuring the hot pressing fluidity of composite materials, the cross-shaped groove is wider at the top and narrower at the bottom, and the ratio range of the widest and narrowest widths is 3:1 - 15:1.

[0011] In the above mold for measuring the hot pressing fluidity of composite materials, overflow channels are arranged at the bottom of the cross-shaped groove and the side wall mold cavity. The upper end of the thimble assembly penetrates into the overflow channels and seals the bottom of the cross-shaped groove and the side wall mold cavity.

[0012] In the above mold for measuring the hot pressing fluidity of composite materials, the thimble assembly includes a thimble seat body arranged at the bottom of the mold body. A thimble rod is arranged on the thimble seat body in a lifting manner, and a lifting frame body is arranged on the upper end surface of the thimble rod. The lifting frame bodies are respectively arranged in the corresponding overflow channels.

[0013] In the above mold for measuring the hot pressing fluidity of composite materials, the driving and guiding mechanism includes a positioning frame arranged around the thimble rod body and at the bottom of the mold body. A lifting and guiding sleeve is arranged at the upper end of the positioning frame, and a lifting driving motor capable of driving the thimble rod to lift and thereby driving the lifting frame body to eject the product is arranged at the bottom of the thimble rod.

[0014] In the above mold for measuring the hot pressing fluidity of composite materials, the diversion mechanism includes diversion holes arranged on the outer wall of the mold body. The diversion holes communicate with the above overflow channels, and a diversion groove extending downward along the side wall of the mold body is arranged at the lower end of the diversion holes.

[0015] In the above-mentioned mold for measuring the hot pressing fluidity of composite materials, the side wall around the mold body is inclined, and the angle range between the side wall and the top plane of the mold body is 91-120°.

[0016] Compared with the existing technology, the advantages of the present utility model are as follows:

[0017] 1. Compared with the penetration test, the measured material fluidity is closer to the flow characteristics of composite materials during the forming of actual complex-shaped parts.

[0018] 2. Compared with the trial production of actual part forming, the molds and presses used are smaller and simpler, and the test is more convenient, efficient and lower in cost.

[0019] 3. Compared with the trial production of actual part forming, the material formability can be tested earlier, which is beneficial to improving the development efficiency of materials and parts and reducing the development cost. Description of the Drawings

[0020] Figure 1 is the overall structural schematic diagram of the present utility model;

[0021] Figure 2 is the structural schematic diagram of the present utility model installed on a press;

[0022] Figure 3 is the cross-sectional view of the present utility model;

[0023] Figure 4 is the structural schematic diagram of the upper end surface of the present utility model;

[0024] Figure 5 is the cross-sectional view of the cross-shaped groove and the overflow channel in the present utility model;

[0025] Figure 6 is the schematic diagram of the arrangement of the end of the ejector pin rod in the present utility model;

[0026] Figure 7 is the structural schematic diagram of the lifting frame body in the present utility model;

[0027] In the figure: mold body 1, side wall cavity 11, groove structure 2, cross-shaped groove 21, shunt partition 22, hot pressing base 23, overflow channel 24, drive guiding mechanism 3, positioning frame 31, lifting guiding sleeve 32, lifting drive motor 33, ejector pin assembly 4, ejector pin seat body 41, ejector pin rod 42, lifting frame body 43, guiding mechanism 5, guiding hole 51, guiding groove 52. Detailed Embodiments

[0028] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0029] AsFigure 1-7 As shown in the figure, a mold for measuring the hot pressing fluidity of a composite material includes a mold body 1 in a box shape. A groove structure 2 arranged in a cross shape is provided at the upper end of the mold body 1. A thimble assembly 4 located at the bottom of the groove structure 2 is connected to the lower end of the mold body 1 through a driving and guiding mechanism 3. And a diversion mechanism 5 communicating with the groove structure 2 is provided on the outer wall around the mold body 1. One end of the diversion mechanism 5 communicating with the groove can be opened and closed by a sealing plug.

[0030] Among them, a side wall mold cavity 11 is provided at the top of the side wall around the mold body 1. The side wall mold cavity 11 communicates with the groove structure 2 and is arranged in a communicating manner on the upper end surface of the mold body 1.

[0031] The side wall mold cavity 11 is used to shunt the groove structure 2 to prevent fluid from overflowing.

[0032] Furthermore, the width range of the side wall mold cavity 11 is 1.5 - 10 MM, and the ratio of the depth to the width of the side wall mold cavity 11 is 10.1:1 - 50:1.

[0033] Obviously, the groove structure 2 includes a cross-shaped groove 21 provided on the upper end surface of the mold body 1. A diversion partition 22 is arranged in the cross-shaped groove 21. A hot pressing base 23 is formed between the cross-shaped grooves 21 on the upper end surface of the mold body 1.

[0034] The setting of the diversion partition 22 can prevent the hot pressing fluid of the composite material in all directions from cross-flowing, which is convenient for judging the fluid volume in all directions.

[0035] Specifically, the cross-shaped groove 21 is in the shape of being wider at the top and narrower at the bottom, and the ratio range of the widest and narrowest widths is 3:1 - 15:1.

[0036] Furthermore, an overflow channel 24 is provided at the bottom of the cross-shaped groove 21 and the side wall mold cavity 11. The upper end of the thimble assembly 4 is inserted into the overflow channel 24 and closes the bottom of the cross-shaped groove 21 and the side wall mold cavity 11.

[0037] The overflow channel 24 is used to discharge fluid. When the thimble assembly 4 rises for jacking, the bottom of the cross-shaped groove 21 and the side wall mold cavity 11 is in a hollow state.

[0038] More specifically, the thimble assembly 4 includes a thimble seat body 41 arranged at the bottom of the mold body 1. A thimble rod 42 is arranged to move up and down on the thimble seat body 41. And a jacking frame body 43 is provided on the upper end surface of the thimble rod 42. The jacking frame body 43 is respectively inserted into the corresponding overflow channels 24.

[0039] The jacking frame body 43 is arranged corresponding to the cross-shaped groove 21 and the side wall mold cavity 11.

[0040] Specifically, the driving and guiding mechanism 3 includes a positioning frame 31 disposed around the body of the ejector pin rod 42 and at the bottom of the mold body 1. The upper end of the positioning frame 31 is provided with a lifting guiding sleeve 32, and the bottom of the ejector pin rod 42 is provided with a lifting driving motor 33 capable of driving the ejector pin rod 42 to lift, thereby driving the lifting frame body 43 to eject the product.

[0041] Preferably, the diversion mechanism 5 includes diversion holes 51 provided on the outer wall of the mold body 1. The diversion holes 51 communicate with the above-mentioned overflow channels 24, and the lower ends of the diversion holes 51 are provided with diversion grooves 52 extending downward along the side wall of the mold body 1.

[0042] In addition, the side walls around the mold body 1 are inclined, and the angle range between the side wall of the mold body 1 and the top plane is 91 - 120°.

[0043] In summary, the principle of this embodiment is as follows: When hot-pressing the composite material, the fluid flows into the cross-shaped grooves 21 and the side wall cavities 11. The hot-pressing fluidity of the composite material is judged by measuring the fluid depths in the cross-shaped grooves 21 and the side wall cavities 11 in four directions. After the measurement is completed, the lifting driving motor 33 drives the ejector pin rod 42 to drive the lifting frame body 43 to rise and eject the fluid product. At this time, the fluid flows into the overflow channels 24 from the bottoms of the cross-shaped grooves 21 and the side wall cavities 11 and is discharged to the outside through the diversion mechanism 5.

[0044] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0045] Although terms such as mold body 1, side wall cavity 11, groove structure 2, cross-shaped groove 21, flow dividing partition 22, hot-pressing base 23, overflow channel 24, driving and guiding mechanism 3, positioning frame 31, lifting guiding sleeve 32, lifting driving motor 33, ejector pin assembly 4, ejector pin seat body 41, ejector pin rod 42, lifting frame body 43, diversion mechanism 5, diversion hole 51, diversion groove 52, etc. are used more frequently in this article, the possibility of using other terms is not excluded. Using these terms is only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A mold for measuring the hot pressing fluidity of a composite material, comprising a mold body (1) in a box shape, characterized in that, The upper end of the mold body (1) is provided with a groove structure (2) arranged in a cross shape. The lower end of the mold body (1) is connected to a thimble assembly (4) located at the bottom of the groove structure (2) through a driving and guiding mechanism (3). And a guiding mechanism (5) communicating with the groove structure (2) is arranged on the outer wall around the mold body (1). One end of the guiding mechanism (5) communicating with the groove is openable and closable through a sealing plug.

2. The mold for measuring the hot pressing fluidity of a composite material according to claim 1, wherein The top of the side wall around the mold body (1) is provided with a side wall mold cavity (11). The side wall mold cavity (11) communicates with the groove structure (2) and is arranged in a communicating manner on the upper end surface of the mold body (1).

3. The mold for measuring the hot pressing fluidity of a composite material according to claim 2, characterized in that, The width range of the side wall mold cavity (11) is 1.5 - 10 MM, and the ratio of the depth to the width of the side wall mold cavity (11) is 10.1:1 - 50:

1.

4. A mold for measuring the hot pressing fluidity of a composite material according to claim 3, characterized in that, The groove structure (2) includes a cross-shaped groove (21) arranged on the upper end surface of the mold body (1). A flow dividing partition (22) is arranged in the cross-shaped groove (21). A hot pressing base (23) is formed between the cross-shaped grooves (21) on the upper end surface of the mold body (1).

5. A mold for measuring the hot pressing fluidity of a composite material according to claim 4, characterized in that, The cross-shaped groove (21) is wider at the top and narrower at the bottom, and the ratio range of the widest width to the narrowest width is 3:1 - 15:

1.

6. The mold for measuring the hot pressing fluidity of a composite material according to claim 5, characterized in that, Overflow channels (24) are arranged at the bottom of the cross-shaped groove (21) and the side wall mold cavity (11). The upper end of the thimble assembly (4) penetrates into the overflow channels (24) and closes the bottom of the cross-shaped groove (21) and the side wall mold cavity (11).

7. A mold for measuring the hot pressing fluidity of a composite material according to claim 6, characterized in that, The thimble assembly (4) includes a thimble seat body (41) arranged at the bottom of the mold body (1). A thimble rod (42) is arranged to be movable up and down on the thimble seat body (41). And a jacking frame body (43) is arranged on the upper end surface of the thimble rod (42). The jacking frame body (43) respectively penetrates into the corresponding overflow channels (24).

8. A mold for measuring the hot pressing fluidity of a composite material according to claim 7, characterized in that, The driving and guiding mechanism (3) includes a positioning frame (31) arranged around the thimble rod (42) body and located at the bottom of the mold body (1). A lifting guiding sleeve (32) is arranged at the upper end of the positioning frame (31). And a lifting driving motor (33) capable of driving the thimble rod (42) to lift so as to drive the jacking frame body (43) to eject the product is arranged at the bottom of the thimble rod (42).

9. The mold for measuring the hot pressing fluidity of a composite material according to claim 6, wherein, The guiding mechanism (5) includes a guiding hole (51) arranged on the outer wall of the mold body (1). The guiding hole (51) communicates with the above-mentioned overflow channel (24). And a guiding groove (52) extending downward along the side wall of the mold body (1) is arranged at the lower end of the guiding hole (51).

10. A mold for measuring the hot pressing fluidity of a composite material according to claim 2, characterized in that, The side wall around the mold body (1) is inclined, and the angle range between the side wall of the mold body (1) and the top plane is 91 - 120°.

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