Carbon fiber cylinder forming die

Abstract

The utility model provides a carbon fiber cylinder forming die which is simple and reasonable in structure, can be conveniently disassembled and assembled, ensures that a carbon fiber material can be normally fed into the die, reduces the situations of yarn clamping and carbon fiber damage, improves the product forming quality, and is convenient for a formed product to be stripped from the die. The mold comprises an upper mold and a lower mold detachably connected with the upper mold, the upper mold and the lower mold are matched to form a mold cavity, an inner core assembly is assembled in the mold cavity, a sliding block is laterally pushed along the lower mold to make contact with the inner core assembly, an overpressure block is embedded in the sliding block, the outer side end of the overpressure block exceeds the edge of the sliding block, and the overpressure block is inserted into the sliding block. A carbon fiber product is laid on the outer surface of the inner core assembly, the inner core assembly comprises a middle shaft and a plurality of sliding blocks which are sequentially and adjacently arranged around the periphery of the middle shaft, the sliding blocks slide in the axis direction of the middle shaft, and the outer wall face of the middle shaft is provided with a draft angle ranging from 0.5 degree to 1 degree.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon fiber cylinder processing, in particular to a carbon fiber cylinder forming die. Background Art

[0002] Carbon fiber is a material in fiber form mainly composed of carbon elements. Its carbon content reaches more than 90%. Therefore, it also has excellent properties that other materials cannot match. It is one of the most excellent and widely used fiber-reinforced composite materials among the current advanced composite materials.

[0003] At present, when the industry makes carbon fiber cylinders, the carbon fiber material is laid in the mold and then hot-pressed. Due to the characteristics of carbon fiber raw materials, the outer diameter of the product will be larger than the mold cavity size before the molding is completed. In order to ensure that the product can enter the mold normally, the carbon fiber material will be laid and then positioned by setting positioning parts on the side. This will increase the positioning structure of the corresponding matching positioning parts in the mold itself, thereby increasing the processing difficulty of the mold itself and failing to guarantee the processing accuracy. In addition, since the upper and lower molds of the mold are subjected to direct pressure and the positioning parts are subjected to lateral thrust, the pressure on the product positioning parts and the upper and lower mold surfaces is not uniform. After molding, the product will have porosity and interlayer differences, and it is easy to have yarn jamming and carbon fiber damage, making the quality of the molded product unstable. After the product is molded, it is not convenient to disassemble and assemble, resulting in poor demolding of the molded product. Utility Model Content

[0004] In view of the above problems, the utility model provides a carbon fiber cylinder forming mold, which has a simple and reasonable structure and can be easily disassembled and assembled, ensuring that the carbon fiber material can enter the mold normally, reducing the situation of yarn clamping and carbon fiber damage, improving the product molding quality, and facilitating the demolding of the molded product.

[0005] The utility model adopts the following technical scheme: a carbon fiber cylinder forming mold, which includes an upper mold and a lower mold detachably connected to the upper mold, the upper mold and the lower mold cooperate to form a cavity, an inner core component is assembled in the cavity, a slider is pushed along the side of the lower mold to contact the inner core component, an overpressure block is embedded in the slider, and the outer end of the overpressure block exceeds the edge of the slider, the carbon fiber product is laid on the outer surface of the inner core component, the inner core component includes a central axis and a plurality of sliding blocks arranged adjacent to each other in sequence around the outer periphery of the central axis, and the sliding blocks are satisfied to slide along the axial direction of the central axis, and the outer wall surface of the central axis is provided with a draft angle of 0.5° to 1°.

[0006] Furthermore, there are four sliding blocks, which are symmetrically slidably assembled on the outer periphery of the central axis in pairs; the two side surfaces of one group of symmetrical sliding blocks are external draft surfaces, and the draft angle of the external draft surfaces is 3° to 5°; the other group of symmetrical sliding blocks are each provided with a slot matching the central axis;

[0007] Further, the inner core component also includes a base, a middle groove is provided in the middle of the base, one end of the middle shaft is installed in the middle groove, a plurality of positioning blocks are provided on the base outside the middle groove, and a positioning groove corresponding to the positioning block is provided on the end surface of the sliding block located on one side of the base; the two ends of the lower mold located at the position of the cavity are respectively provided with a first placement groove and a second placement groove, the width of the first placement groove is greater than the width of the second placement groove, the base is installed in the first placement groove, and the other end of the middle shaft is installed in the second placement groove;

[0008] Furthermore, the central axis is provided with an air guide hole which passes through from top to bottom; the length of the central axis is greater than the length of the sliding block; and the inner wall contact surfaces of another group of symmetrical sliding blocks are provided with avoidance grooves;

[0009] Furthermore, the middle parts of the upper mold and the lower mold are both provided with semicircular mounting grooves, and the mold cavity is enclosed by two semicircular mounting groove covers; the end surface of the lower mold located on both sides of the semicircular mounting groove is provided with sliding grooves, and the slider is slidably assembled in the sliding grooves;

[0010] Furthermore, a positioning groove is provided on the end surface of the lower mold, and a positioning block corresponding to the positioning groove is provided on the end surface of the upper mold covering the lower mold;

[0011] Furthermore, the slider is provided with a plurality of air outlets connected with the cavity; the slider located at the side end of the semicircular installation groove is provided with a yarn clamping edge;

[0012] Furthermore, the upper surface of the slider is provided with a glue overflow groove arranged along the length direction of the central axis, the upper surface of the slider is provided with a glue guide groove connected to the glue overflow groove, and the glue guide groove extends to the outer edge of the slider;

[0013] Furthermore, a limiting boss is provided on the upper surface of the sliding block, and a limiting groove corresponding to the limiting boss is provided at the bottom end of the upper die;

[0014] Furthermore, there is a gap between both ends of the inner core component and the upper mold and the lower mold, and the gap is greater than 3 mm.

[0015] The beneficial effect of the utility model is that an inner core component is installed in a cavity formed by the cooperation of an upper mold and a lower mold, and a plurality of sliding blocks are arranged and assembled adjacent to each other on the central axis in sequence. Then, by separately splitting and installing them, it can be ensured that the carbon fiber product can be normally put into the mold, and the situation of yarn clamping and damage to the carbon fiber product can be reduced. The outer surface of the central axis is a draft surface that is easy to insert and pull out, which facilitates the demolding of the molded product. The over-pressure block is arranged to perform pressure compensation to avoid porosity and interlayer differences in the product after molding, thereby having good economic use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the assembly structure after the upper mold is hidden in the utility model;

[0018] Figure 3 This is a schematic diagram of the assembly structure after the upper die and the slider are hidden in the utility model;

[0019] Figure 4 It is a structural schematic diagram of the inner core component in the utility model;

[0020] Figure 5 This is a schematic diagram of the assembly structure after the central axis is hidden in the inner core component of the utility model;

[0021] Figure 6 This is a schematic diagram of the assembly structure after the sliding block is hidden in the inner core component of the utility model;

[0022] Figure 7 It is a schematic diagram of the assembly structure after the central axis and the sliding block are hidden in the inner core component of the utility model. DETAILED DESCRIPTION

[0023] like Figure 1 to Figure 7 As shown, the utility model is a carbon fiber cylinder forming mold, which includes an upper mold 1 and a lower mold 2 detachably connected to the upper mold 1, the upper mold 1 and the lower mold 2 cooperate to form a cavity, the inner core component 3 is assembled in the cavity, the slider 4 is pushed along the side of the lower mold 2 to contact the inner core component 3, an overpressure block 5 is embedded in the slider 4, and the outer end of the overpressure block 5 exceeds the edge of the slider 4 by 0.1mm, so that the slider 4 has an overpressure of 0.1mm, and the insufficient pressure is compensated by this overpressure method; the carbon fiber product 6 is laid on the outer surface of the inner core component 3, the inner core component 3 includes a central axis 7 and a plurality of sliding blocks arranged adjacent to each other around the outer periphery of the central axis 7, and the sliding blocks are satisfied to slide along the axial direction of the central axis 7, and the outer wall surface of the central axis 7 is provided with a draft angle of 0.5° to ensure that the central axis 7 can be pulled out along the axial direction.

[0024] There are four sliding blocks, which are divided into a first sliding block 8, a second sliding block 9, a third sliding block 10, and a fourth sliding block 11. The first sliding block 8 and the third sliding block 10, the second sliding block 9 and the fourth sliding block 11 are symmetrically slidably assembled on the outer periphery of the central axis 7 in pairs; both side surfaces of the first sliding block 8 and the third sliding block 10 are external draft surfaces, and the draft angle of the external draft surface is 3°, which ensures that the central axis 7 can be demolded and taken out inward after being pulled out; the second sliding block 9 and the fourth sliding block 11 are both provided with a card slot 29 matching the central axis 7, which is used for positioning with the central axis 7 to avoid left-right misalignment when under pressure.

[0025] The inner core component 3 also includes a base 12, a middle groove 13 is provided in the middle of the base 12, one end of the central axis 7 is installed in the middle groove 13, and a plurality of locking blocks 14 are provided on the base 12 outside the middle groove 13. The first sliding block 8, the second sliding block 9, the third sliding block 10, and the fourth sliding block 11 on one side of the base 12 are provided with locking grooves 15 corresponding to the locking blocks 14. When each sliding block is in place, it can be positioned and clamped by the locking blocks 14 and the locking grooves 15, thereby preventing the sliding blocks from tilting up when subjected to external pressure; the two ends of the lower mold 2 located at the cavity position are respectively provided with a first placement groove 16 and a second placement groove 17, the width of the first placement groove 16 is greater than the width of the second placement groove 17, the base 12 is installed in the first placement groove 16, and the other end of the central axis 7 is installed in the second placement groove 17.

[0026] The central axis 7 is provided with an air guide hole 18 which passes through from top to bottom to reduce the locking of the sliding block and the central axis 7; the length of the central axis 7 is greater than the length of the sliding block; the inner wall contact surfaces of the second sliding block 9 and the fourth sliding block 11 are provided with avoidance grooves 19 to reduce the friction between the central axis 7 and the central axis 7.

[0027] A semicircular mounting groove 20 is provided in the middle of the upper mold 1 and the lower mold 2, and the cavity is enclosed by the two semicircular mounting grooves 20; a slide groove 21 is provided on the end surface of the lower mold 2 on both sides of the semicircular mounting groove 20, and the slider 4 is slidably assembled in the slide groove 21; a positioning groove 22 is provided on the end surface of the lower mold 2, and a positioning block 23 corresponding to the positioning groove 22 is provided on the end surface of the upper mold 1 covering the lower mold 2.

[0028] The slider 4 is provided with a plurality of air outlets 24 connected with the cavity, which are used to discharge the air inside the product during the molding process to avoid air bubble defects inside the product; the slider 4 located at the side end of the semicircular mounting groove 20 is provided with a yarn clamping edge 25, which is used to extrude excess carbon fiber interlayer during the molding process; the upper surface of the slider 4 is provided with an overflow glue groove 26 arranged along the length direction of the central axis 7, and the upper surface of the slider 4 is provided with a glue guide groove 27 connected with the overflow glue groove 26, and the glue guide groove 27 extends to the outer edge of the slider 4, through the overflow glue groove 26 and the glue guide groove 27, it can be used to discharge excess resin during the molding process; the upper surface of the slider 4 is provided with a limiting boss 28, and the bottom end of the upper mold 1 is provided with a limiting groove (not shown in the figure) corresponding to the limiting boss 28, thereby realizing side push limiting.

[0029] There is a gap 30 between both ends of the inner core component 3 and the upper mold 1 and the lower mold 2. The gap 30 is greater than 3 mm to avoid interference.

[0030] In the utility model, during assembly, the following steps are included:

[0031] In the first step, one end of the central axis 7 is inserted into the central groove 13 of the base 12;

[0032] Step 2: Slide the second sliding block 9 into the middle shaft 7 and position it through the pin;

[0033] Step 3: slide the first sliding block 8 and the third sliding block 10 into the central axis 7 respectively, and limit the positions by matching the positioning groove 15 with the positioning block 14;

[0034] Step 4: Keep this state, continue to slide the fourth sliding block 11, and also use the positioning groove 15 to match the positioning block 14 to limit the position, and finally make fine adjustments through the pin to correct the relative positions of the four sliding blocks;

[0035] Step 5. After the position is corrected, the corresponding screws are locked, and all the sliding blocks are locked. At the same time, all the pins used for positioning are removed to prevent the pins from getting stuck when the mold is pressed together. At this point, the entire inner core assembly 3 is assembled;

[0036] Step 6: Place the prepared carbon fiber product 6 on the outer surface of the inner core component 3, and then place the inner core component 3 with the carbon fiber product 6 in the lower mold 2;

[0037] Step 7: The sliders 4 on both sides slide into the lower mold 2 respectively, and are pushed sideways until they come into contact with the inner core assembly 3;

[0038] Step 8. Close the upper mold 1. At this point, the entire carbon fiber cylinder molding mold is assembled.

[0039] When disassembling and demoulding, the following steps are included:

[0040] Step 1: After the molding is completed, lift out the inner core component 3, and then remove the corresponding screws on the inner core component 3;

[0041] Step 2: Since the outer wall surface of the central axis 7 is provided with a draft angle of 0.5°, the central axis 7 can be conveniently withdrawn first;

[0042] Step 3: Since both sides of the first sliding block 8 and the third sliding block 10 are external draft surfaces, and the draft angle of the external draft surface is 3°, the first sliding block 8 and the third sliding block 10 can be pressed inwards first, so that the first sliding block 8 and the third sliding block 10 can be taken out respectively;

[0043] In the fourth step, the second sliding block 9 and the fourth sliding block 11 are also taken out inwards, thereby completing the demoulding of the carbon fiber molded product.

[0044] In summary, the utility model can effectively solve the problems of carbon fiber cylinder molding, difficult molding and difficult demolding in the industry, and can solve the differences in the positions of the carbon fiber cylinder sliders between layers and other positions; through the splitting method, it is easy to assemble and disassemble, easy to position, and can ensure that the carbon fiber can be normally molded, reducing the situation of yarn clamping and damage to the carbon fiber.

[0045] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A carbon fiber cylinder forming mold, comprising an upper mold and a lower mold detachably connected to the upper mold, wherein the upper mold and the lower mold cooperate to form a cavity, characterized in that: The inner core component is assembled in the cavity, and the slider is pushed along the side of the lower mold to contact the inner core component. An overpressure block is embedded in the slider, and the outer end of the overpressure block exceeds the edge of the slider. The carbon fiber product is laid on the outer surface of the inner core component. The inner core component includes a central axis and a plurality of sliding blocks arranged adjacent to each other in sequence around the outer periphery of the central axis, and the sliding blocks are able to slide along the axial direction of the central axis. The outer wall surface of the central axis is provided with a draft angle of 0.5° to 1°.

2. A carbon fiber cylinder forming mold according to claim 1, characterized in that: There are four sliding blocks, and they are symmetrically slidably assembled on the outer periphery of the central axis in pairs; the two side surfaces of one group of symmetrical sliding blocks are external draft surfaces, and the draft angle of the external draft surfaces is 3° to 5°; the other group of symmetrical sliding blocks are each provided with a slot matching the central axis.

3. A carbon fiber cylinder forming mold according to claim 1, characterized in that: The inner core component also includes a base, a middle groove is provided in the middle of the base, one end of the central axis is installed in the middle groove, a plurality of locking blocks are provided on the base outside the middle groove, and a locking groove corresponding to the locking block is provided on the end surface of the sliding block located on one side of the base; the two ends of the lower mold located at the cavity position are respectively provided with a first placement groove and a second placement groove, the width of the first placement groove is greater than the width of the second placement groove, the base is installed in the first placement groove, and the other end of the central axis is installed in the second placement groove.

4. A carbon fiber cylinder forming mold according to claim 2, characterized in that: The central axis is provided with an air guide hole which passes through from top to bottom; the length of the central axis is greater than the length of the sliding block; and avoidance grooves are arranged on the inner wall contact surfaces of another group of symmetrical sliding blocks.

5. A carbon fiber cylinder forming mold according to claim 1, characterized in that: Semicircular mounting grooves are provided in the middle of the upper mold and the lower mold, and the cavity is enclosed by two semicircular mounting groove covers; sliding grooves are provided on the end faces of the lower mold on both sides of the semicircular mounting grooves, and the sliders are slidably assembled in the sliding grooves.

6. A carbon fiber cylinder forming mold according to claim 1, characterized in that: A positioning groove is arranged on the end surface of the lower die, and a positioning block corresponding to the positioning groove is arranged on the end surface of the upper die covering the lower die.

7. A carbon fiber cylinder forming mold according to claim 5, characterized in that: The slider is provided with a plurality of air outlets communicated with the cavity; and the slider located at the side end of the semicircular installation groove is provided with a yarn clamping edge.

8. The carbon fiber cylinder forming mold according to claim 1, characterized in that: The upper surface of the slider is provided with a glue overflow groove arranged along the length direction of the central axis, the upper surface of the slider is provided with a glue guide groove connected with the glue overflow groove, and the glue guide groove extends to the outer edge of the slider.

9. The carbon fiber cylinder forming mold according to claim 1, characterized in that: A limiting boss is provided on the upper surface of the sliding block, and a limiting groove corresponding to the limiting boss is provided at the bottom end of the upper die.

10. The carbon fiber cylinder forming mold according to claim 1, characterized in that: There are gaps between the two ends of the inner core component and the upper mold and the lower mold, and the gaps are greater than 3mm.

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