A mold structure for undercut molding of thermosetting fiber reinforced molded products

Abstract

The present invention discloses a mold structure for undercut molding of thermosetting fiber reinforced molded products, comprising an upper mold and a lower mold matched with the upper mold, wherein the lower mold comprises a lower mold body and an undercut convex block detachable from the lower mold body, wherein the undercut convex block cooperates with the corresponding position of the upper mold to form an undercut cavity, and a lifting assembly is arranged below the undercut convex block. The above-mentioned mold structure for undercut molding of thermosetting fiber reinforced molded products is reasonable, and an undercut structure specially suitable for molding thermosetting glass fiber reinforced material molded products is proposed, which overcomes the phenomenon that the product undercut and the product cannot be integrally molded during molded production.

Description

Technical Field

[0001] The invention relates to a mold structure design for undercut molding, in particular to a mold structure for undercut molding of a thermosetting fiber reinforced molded product. Background Art

[0002] After the thermosetting fiber reinforced material is molded, a large amount of flash will be generated on the product, and the flash will overflow into the matching gap of the mold structure, causing the mold structure to get stuck and damage the mold. Therefore, thermosetting fiber reinforced materials generally cannot be designed with a core-pulling mechanism to mold the undercuts of thermosetting fiber reinforced material molded products; in actual production, the undercuts are usually connected to the product through later work, which not only destroys the integrity of the product, but also increases the workload and reduces production efficiency.

[0003] Therefore, it is necessary to improve the mold structure of the undercut molding of thermosetting fiber reinforced molded products in the prior art. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects in the prior art and provide a mold structure for undercut molding of thermosetting fiber reinforced molded products, thereby overcoming the phenomenon that the undercut and the product cannot be integrally molded during molding production.

[0005] In order to achieve the above technical effect, the technical solution of the present invention is: a mold structure for undercut molding of thermosetting fiber reinforced molded products, characterized in that it includes an upper mold and a lower mold matched with the upper mold, the lower mold includes a lower mold body and an undercut protrusion (41) that can be separated from the lower mold body, the undercut protrusion (41) cooperates with the corresponding position of the upper mold to form an undercut cavity, and a lifting component is arranged below the undercut protrusion (41). Through such a design, the undercut protrusion is designed to be liftable, and the undercut protrusion moves upward with the product in the product undercut until the product can be taken out from the side and the product undercut is separated from the undercut protrusion.

[0006] The preferred technical solution is that the lifting assembly comprises a base (5), a connecting rod (42), a pedestal and a lifting mechanism for driving the base to lift and lower, the base (5) is fixedly connected to the frame; the undercut protrusion (41) is fixedly connected to the pedestal through the connecting rod (42); the lifting mechanism is fixedly connected to the base (5); and the frame is provided with a guide block for guiding the connecting rod (42). Through such a design, the purpose of lifting and lowering the pedestal is achieved.

[0007] The preferred technical solution is that the lifting mechanism is a hydraulic press (51), the cylinder of the hydraulic press (51) is fixedly connected to the base (5), and the piston rod of the hydraulic press (51) is connected to the base. Through such a design, the base can be lifted and lowered, and the undercut convex block moves upward together in the product undercut; as an equivalent replacement, the hydraulic press can also be a servo motor plus a screw combination.

[0008] The preferred technical solution is that it also includes a rotating assembly (4), the rotating assembly (4) includes a base, the base includes an upper base (43) and a lower base (44), the upper base (43) is fixedly connected to the undercut protrusion (41) through the connecting rod (42), one side of the upper base (43) is connected to one side of the lower base (44) through a rotating shaft (45), and a compression spring (46) is sandwiched between the other side of the upper base (43) and the other side of the lower base (44); the lower base (44) is provided with an upper base accommodating groove (441), and the lower base (44) is provided with a through hole (442) for the hydraulic press (51) to pass through, and the hydraulic rod of the hydraulic press (51) contacts the bottom end surface of the upper base (43).

[0009] The preferred technical solution is that the rotating assembly (4) further includes a guide assembly fixedly connected to the frame, the guide assembly includes a first limit block (2), the first limit block (2) is provided with a first inclined surface (21); the upper base (43) is provided with a third inclined surface (431) matched with the first inclined surface (21); the third inclined surface (431) extends downward to form a third vertical matching guide surface (434). Through such a design, the rotating assembly is ejected upward, and under the pushing action of the first inclined surface, the rotating assembly rotates around the rotating axis, the upper base rotates around the rotating axis, and the undercut protrusion is completely separated from the product undercut.

[0010] The preferred technical solution is that the guide assembly further includes a second limit block (3), the first limit block (2) and the second limit block (3) are located on both sides of the swing direction of the connecting rod (42), the second limit block (3) is provided with a second inclined surface (31) parallel to the first inclined surface (21), and the connecting rod (42) is provided with a fourth inclined surface (432) matched with the second inclined surface (31); the fourth inclined surface (432) extends upward to form a fourth vertical matching guide surface (435); the fourth vertical matching guide surface (435) and the third vertical matching guide surface (434) are arranged in parallel. Through such a design, when the rotating assembly rotates around the rotating shaft, the second inclined surface can play a supporting role to maintain the stability of the rotation movement.

[0011] The preferred technical solution is that a limit block (443) is fixedly provided on the top surface of the lower base (44) to prevent the upper base (43) from popping out. With such a design, it can be ensured that the upper base will not pop out under the action of the compression spring, thereby ensuring the stability of the upper base.

[0012] The advantages and beneficial effects of the present invention are as follows: the mold structure for the undercut molding of the thermosetting fiber reinforced molded product of the present invention is reasonable, and an undercut structure specifically suitable for molding thermosetting glass fiber reinforced material molded products is proposed, which overcomes the phenomenon that the undercut and the product cannot be integrally molded during molding production, expands the flexibility of the molded product structure design, and enables the product to be applied and designed in a wider range. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 1 is a schematic structural diagram of a mold structure embodiment 1 for undercut molding of a thermosetting fiber-reinforced molded product according to the present invention;

[0014] Figure 2 1 is a schematic structural diagram of a mold structure embodiment 2 for undercut molding of a thermosetting fiber-reinforced molded product according to the present invention;

[0015] Figure 3 It is an enlarged view of point A in the structural schematic diagram of embodiment 2 of the mold structure for undercut molding of thermosetting fiber reinforced molded products of the present invention;

[0016] Figure 4 2 is a schematic structural diagram from another perspective of the mold structure embodiment 2 for undercut molding of thermosetting fiber reinforced molded products according to the present invention;

[0017] Figure 5 It is an enlarged view of point C in another perspective structural schematic diagram of embodiment 2 of the mold structure for undercut molding of thermosetting fiber reinforced molded products of the present invention;

[0018] Figure 6 It is a schematic structural diagram of product 1 in Example 2 of the mold structure for undercut molding of thermosetting fiber-reinforced molded products of the present invention;

[0019] Figure 7 It is an enlarged view of point B in the structural schematic diagram of product 1 of embodiment 2 of the mold structure for undercut molding of thermosetting fiber reinforced molded products of the present invention;

[0020] Figure 8 It is an enlarged view of the undercut protrusion 41 in the mold structure embodiment 2 for undercut molding of the thermosetting fiber reinforced molded product of the present invention;

[0021] Fig. 9 It is a schematic structural diagram of the rotating assembly 4 in Embodiment 2 of the mold structure for undercut molding of thermosetting fiber-reinforced molded products of the present invention;

[0022] Fig.10 It is a schematic diagram of the second limiting block 3 and the second inclined surface 31 in the embodiment 2 of the mold structure for undercut molding of the thermosetting fiber reinforced molded product of the present invention;

[0023] Fig.11 It is a schematic diagram of the first limit block 2 and the first inclined surface 21 in the embodiment 2 of the mold structure for undercut molding of the thermosetting fiber reinforced molded product of the present invention;

[0024] Fig.12 It is a cross-sectional view of an upper base 43, a lower base 44 and a base 5 of a mold structure embodiment 2 for undercut molding of a thermosetting fiber reinforced molded product of the present invention;

[0025] Fig.13 It is a schematic diagram of the cooperation between the rotating assembly 4 and the product 1 of the mold structure embodiment 2 of the thermosetting fiber reinforced molded product of the present invention;

[0026] Fig.14 It is a schematic diagram of the mold structure embodiment 2 of the thermosetting fiber reinforced molded product undercut molding of the present invention, in which the rotating component 4 is disengaged from the product undercut 11;

[0027] Fig.15 It is a schematic diagram of the mold structure embodiment 2 of the thermosetting fiber reinforced molded product undercut molding of the present invention, in which the rotating component 4 is completely separated from the product undercut 11.

[0028] In the figure: 1. product; 11. product inverted; 2. first limit block; 21. first inclined surface; 3. second limit block; 31. second inclined surface; 4. rotating assembly; 41. inverted protrusion; 42. connecting rod; 43. upper base; 431. third inclined surface; 432. fourth inclined surface; 434. third vertical matching guide surface; 435. fourth vertical matching guide surface; 44. lower base; 441. upper base accommodating groove; 442. through hole; 443. limit block; 45. rotating shaft; 46. compression spring; 5. base; 51. hydraulic press. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0030] Example 1

[0031] like Figure 1 As shown, the mold structure for inverted molding of the thermosetting fiber reinforced molded product in Example 1 includes an upper mold and a lower mold cooperating with the upper mold, the lower mold includes a lower mold body and an inverted protrusion 41 which can be detached from the lower mold body, the inverted protrusion 41 cooperates with the corresponding position of the upper mold to form an inverted cavity, and a lifting assembly is arranged below the inverted protrusion 41.

[0032] The lifting assembly includes a base 5, a connecting rod 42, a base and a lifting mechanism for driving the base to lift and lower. The base 5 is fixedly connected to the frame; the inverted protrusion 41 is fixedly connected to the base through the connecting rod 42; the lifting mechanism is fixedly connected to the base; the frame is provided with a guide block for guiding the connecting rod 42.

[0033] The lifting mechanism is a hydraulic press 51 , a cylinder of the hydraulic press 51 is fixedly connected to the base 5 , and a piston rod of the hydraulic press 51 is connected to the pedestal.

[0034] After the molding is completed, the upper and lower molds of the mold are opened, and the undercut protrusion 41 is pushed upward by the hydraulic press 51 until the product 1 is separated from the lower mold. The product 1 is manually removed from the side, and the undercut protrusion 41 is separated from the product undercut 11.

[0035] Example 2

[0036] like Figure 2-14 As shown, the difference between Example 2 and Example 1 is that it further includes a rotating component 4, the rotating component 4 includes a base, the base includes an upper base 43 and a lower base 44, the upper base 43 is fixedly connected to the undercut protrusion 41 through a connecting rod 42, one side of the upper base 43 is connected to one side of the lower base 44 through a rotating shaft 45, and a compression spring 46 is clamped between the other side of the upper base 43 and the other side of the lower base 44; the lower base 44 is provided with an upper base accommodating groove 441, and the lower base 44 is provided with a through hole 442 for the hydraulic press 51 to pass through, and the hydraulic rod of the hydraulic press 51 is in contact with the bottom end surface of the upper base 43.

[0037] The rotating assembly 4 also includes a guide assembly fixedly connected to the frame, the guide assembly includes a first limit block 2, the first limit block 2 is provided with a first inclined surface 21; the upper base 43 is provided with a third inclined surface 431 matching the first inclined surface 21; the third inclined surface 431 extends downward to form a third vertical matching guide surface 434.

[0038] The guide assembly also includes a second limit block 3. The first limit block 2 and the second limit block 3 are located on both sides of the swinging direction of the connecting rod 42. The second limit block 3 is provided with a second inclined surface 31 parallel to the first inclined surface 21. The connecting rod 42 is provided with a fourth inclined surface 432 matching with the second inclined surface 31; the fourth inclined surface 432 extends upward to form a fourth vertical matching guide surface 435; the fourth vertical matching guide surface 435 and the third vertical matching guide surface 434 are arranged in parallel.

[0039] A limit block 443 is fixedly disposed on the top surface of the lower base 44 to prevent the upper base 43 from popping out.

[0040] When the molding is completed, the upper and lower molds of the mold are opened, and the rotating component 4 moves upward under the action of the hydraulic press 51. At this time, the rotating component 4 moves in a straight line; when the third inclined surface 431 begins to contact the first inclined surface 21, the rotating component 4 rotates around the rotating shaft 45 under the limiting action of the first inclined surface 21, and enters the rotating core pulling process. At this time, the third inclined surface 431 slides with the first inclined surface 21, and the fourth inclined surface 432 slides with the second inclined surface 31. The rotating component 4 maintains a stable rotation motion under the push of the first limit block 2 and the support of the second limit block 3; until the rotating component 4 continues to be ejected upward, the corresponding rotating component 4 continues to rotate around the rotating shaft 45, and the undercut protrusion 41 is completely separated from the product undercut 11; thereby, the product 1 can be taken out of the mold.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A mold structure for undercut molding of thermosetting fiber reinforced molded products, characterized in that: The invention comprises an upper mold and a lower mold matched with the upper mold, wherein the lower mold comprises a lower mold body and an undercut protrusion (41) detachable from the lower mold body, the undercut protrusion (41) cooperates with a corresponding position of the upper mold to form an undercut cavity, and a lifting assembly is arranged below the undercut protrusion (41); The lifting assembly comprises a base (5), a connecting rod (42), a pedestal and a lifting mechanism for driving the base to lift and lower; the base (5) is fixedly connected to a frame; the undercut protrusion (41) is fixedly connected to the pedestal via the connecting rod (42); the lifting mechanism is fixedly connected to the base (5); and the frame is provided with a guide block for guiding the connecting rod (42); The lifting mechanism is a hydraulic press (51), the cylinder of the hydraulic press (51) is fixedly connected to the base (5), and the piston rod of the hydraulic press (51) is connected to the base; The rotary assembly (4) further comprises a base, wherein the base comprises an upper base (43) and a lower base (44), wherein the upper base (43) is fixedly connected to the undercut protrusion (41) via the connecting rod (42), one side of the upper base (43) is connected to one side of the lower base (44) via a rotating shaft (45), and a compression spring (46) is sandwiched between the other side of the upper base (43) and the other side of the lower base (44); the lower base (44) is provided with an upper base accommodating groove (441), and the lower base (44) is provided with a through hole (442) for the hydraulic press (51) to pass through, and the hydraulic rod of the hydraulic press (51) contacts the bottom end surface of the upper base (43); The rotating assembly (4) further comprises a guide assembly fixedly connected to the frame, the guide assembly comprising a first limit block (2), the first limit block (2) being provided with a first inclined surface (21); the upper base (43) being provided with a third inclined surface (431) matching with the first inclined surface (21); the third inclined surface (431) extending downwardly to form a third vertical matching guide surface (434); The guide assembly further comprises a second limit block (3); the first limit block (2) and the second limit block (3) are located on both sides of the swinging direction of the connecting rod (42); the second limit block (3) is provided with a second inclined surface (31) parallel to the first inclined surface (21); the connecting rod (42) is provided with a fourth inclined surface (432) matched with the second inclined surface (31); the fourth inclined surface (432) extends upward to form a fourth vertical matching guide surface (435); the fourth vertical matching guide surface (435) and the third vertical matching guide surface (434) are arranged in parallel; A limiting block (443) is fixedly provided on the top surface of the lower base (44) to prevent the upper base (43) from popping out.

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