Automobile bumper mold integrating ultrasonic-assisted demolding

Abstract

The invention discloses an automobile bumper mold integrating ultrasonic-assisted demolding in the technical field of injection molds, which comprises an upper mold base, a lower mold base, a base for fixing the lower mold base and an ejection mechanism arranged in the base, and the upper part of the ejection mechanism penetrates through the lower mold base and is used for pushing a bumper to be separated from a mold cavity after injection molding; the ultrasonic assembly is arranged in a peripheral groove of a binding surface of the upper die holder and the lower die holder; and the multiple first vibration transmission components are evenly distributed in the circumferential direction of the upper die base and the lower die base and penetrate through the upper die base and the lower die base, and the inner ends of the first vibration transmission components are matched with the outer contour of the bumper and attached to the outer contour of the bumper. According to the mold, global vibration coverage is achieved through the ultrasonic assembly moving in the circumferential direction, precise vibration transmission can be conducted on the side face of the bumper in cooperation with the first vibration transmission component, energy loss is low, demolding resistance is remarkably reduced, and the problems of deformation and scratching caused by too large adhesive force of the bumper in a traditional ejection mode are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection mold, in particular to an automobile bumper mold integrated with ultrasonic assisted demolding. BACKGROUND

[0002] In the injection molding process of large and complex plastic products such as automobile bumpers, demolding is a key link to determine product quality and production efficiency. After injection molding, the upper and lower molds are separated, and the molded plastic part is retained in the cavity of the lower mold. Since the lower mold cavity is a concave structure, the plastic part is tightly attached to the mold surface after cooling and shrinking, forming strong physical adsorption force and intermolecular adhesion. At present, mechanical ejection is generally used to achieve demolding. However, due to the large size and wide surface area of the bumper, the contact area with the mold is large, and a large ejection force is required for ejection demolding, which can easily cause stress concentration in the bumper, resulting in defects such as white top, top wear, stress cracking, etc.

[0003] Ultrasonic assisted demolding has attracted attention because it can effectively reduce the interfacial friction and adhesion by high-frequency micro-vibration. However, the existing ultrasonic demolding method generally uses fixed-point vibration, such as embedding an ultrasonic transducer directly into the mold. Only local area can be excited, and uniform vibration cannot be achieved for large bumper circumferential area, resulting in unsatisfactory demolding effect.

[0004] Therefore, an automobile bumper mold integrated with ultrasonic assisted demolding is provided to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide an automobile bumper mold integrated with ultrasonic assisted demolding, which solves the problem of difficult demolding of large plastic parts in existing injection molds and easy damage.

[0006] The present application achieves the above-mentioned purposes through the following technical solutions: An automobile bumper mold integrated with ultrasonic assisted demolding, comprising an upper mold base, a lower mold base, a base for fixing the lower mold base, and an ejection mechanism arranged in the base, the upper part of the ejection mechanism penetrating through the lower mold base, used for pushing the bumper out of the cavity after injection molding, further comprising: An ultrasonic assembly arranged in the circumferential groove of the abutting surface of the upper mold base and the lower mold base; A first vibration transmission component, uniformly arranged along the circumference of the upper mold base and the lower mold base, penetrating through the upper mold base and the lower mold base, the inner end of the first vibration transmission component being adapted to the outer contour of the bumper and forming an abutment, and the outer end being adapted to the ultrasonic assembly, used for transmitting the vibration of the ultrasonic assembly to the side surface of the bumper; A driving mechanism is fixedly arranged in the circumferential groove of the lower die seat, and is used to drive the ultrasonic assembly to move along the circumference of the mold so as to be in contact with each first vibration transmission component in sequence to realize circumferential full-area ultrasonic and assist the ejection mechanism to demold.

[0007] As a further optimization scheme of the present application, two groups of ultrasonic assemblies are symmetrically arranged along the circumference of the mold; each group of ultrasonic assemblies comprises two ultrasonic transducers which are arranged on the side walls of the upper die seat and the lower die seat respectively, an amplitude rod is fixedly arranged at the output end of each ultrasonic transducer, a first end block is fixedly arranged at the end of the amplitude rod, and a ball head is arranged on the first end block.

[0008] As a further optimization scheme of the present application, the first vibration transmission component comprises a first threaded vibration transmission rod and a second end block fixedly arranged at the outer end of the first threaded vibration transmission rod, a spherical recess adapted to the ball head is arranged on the second end block; a first screw hole threadedly connected with the first threaded vibration transmission rod is arranged on the side wall of the upper die seat, and a second screw hole threadedly connected with the first threaded vibration transmission rod is arranged on the side wall of the lower die seat.

[0009] As a further optimization scheme of the present application, the driving mechanism comprises an annular track, a sliding block slidingly arranged in the annular track, a mounting bracket fixedly arranged at the top of the sliding block, and a driving unit used to drive the sliding block to move.

[0010] As a further optimization scheme of the present application, the ultrasonic transducer is slidingly arranged in the mounting bracket, a sliding strip is arranged on the side wall of the ultrasonic transducer, and a first spring is fixedly arranged between the ultrasonic transducer and the mounting bracket.

[0011] As a further optimization scheme of the present application, a positioning assembly is further arranged, which is used to drive the ball head to be clamped into the spherical recess when the ultrasonic assembly moves to the position of the first vibration transmission component; the positioning assembly comprises an annular support plate and a plurality of second wedge-shaped blocks fixedly arranged on the upper and lower surfaces of the annular support plate, each second wedge-shaped block corresponds to one first vibration transmission component; a first wedge-shaped block is fixedly arranged on the ultrasonic transducer located on the opposite side of the first spring, and the second wedge-shaped block and the first wedge-shaped block are wedge-shaped driven to drive the ultrasonic transducer to move along the radial direction.

[0012] As a further optimization scheme of the present application, a plurality of second vibration transmission components are uniformly arranged along the circumference of the lower die seat; the inner end of each second vibration transmission component is in abutment with the ejection mechanism, and the outer end extends to the outside of the lower die seat, which is used to transmit the vibration of the ultrasonic assembly to the bottom surface of the bumper through the ejection mechanism.

[0013] As a further optimization scheme of the present application, the second vibration transmission component comprises a second threaded vibration transmission rod, a connecting rod fixedly arranged at the outer end of the second threaded vibration transmission rod, and a third end block fixedly arranged at the end of the connecting rod; a spherical recess adapted to the ball head is formed on the third end block, the height of the third end block is flush with that of the second end block, and a second wedge-shaped block is also arranged at the position corresponding to the second vibration transmission component of the positioning assembly; and a third threaded hole in threaded connection with the second threaded vibration transmission rod is arranged on the side wall of the lower die seat.

[0014] As a further optimization scheme of the present application, the ejection mechanism comprises a movable bottom plate, a top rod fixedly arranged at the top of the movable bottom plate, and a guide rod fixedly arranged at the corner of the top of the movable bottom plate; a top plate is fixedly arranged at the top end of the top rod, a tapered groove is formed on the top plate, a tapered portion adapted to the tapered groove is arranged at the inner end of the second threaded vibration transmission rod, and a second spring is sleeved on the guide rod.

[0015] The present application has the following beneficial effects: 1. The present application realizes full-area vibration coverage through the circumferential movement of the ultrasonic wave assembly, cooperates with the first vibration transmission component, can accurately vibrate the side surface of the bumper, has low energy loss, significantly reduces the demolding resistance, and solves the problems of deformation and scratching of the bumper caused by excessive adhesion in the traditional ejection method.

[0016] 2. In the process of full-area vibration of the circumferential movement of the ultrasonic wave assembly, the present application cooperates with the second vibration transmission component, can accurately vibrate the bottom surface of the bumper through the ejection mechanism, and the bidirectional vibration of the side surface and the bottom surface is coordinated to further reduce the demolding resistance.

[0017] 3. The present application can realize automatic positioning and coupling when the ultrasonic wave assembly moves to the positions of the first vibration transmission component and the second vibration transmission component through the positioning assembly, drives the ball head to be clamped into the spherical recess, forms a stable acoustic coupling structure, and improves the efficiency of auxiliary demolding. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic view of the overall structure of the present application; Figure 2 It is a schematic view of the main structure of the mold of the present application; Figure 3 It is a schematic view of the structure of the ultrasonic wave assembly, the first vibration transmission component and the driving mechanism of the present application; Figure 4 It is an assembly schematic view of the ultrasonic wave assembly and the first vibration transmission component of the present application; Figure 5 It is an installation structure schematic view of the positioning assembly of the present application; Figure 6 It is an assembly schematic view of the positioning assembly and the ultrasonic wave assembly of the present application; Figure 7Structure schematic diagram of second vibration transmission component and ejection mechanism of the application; Figure 8 Structure schematic diagram of second vibration transmission component and ejection mechanism of the application Figure 7 Structure enlarged schematic diagram of A in the application.

[0019] Structure enlarged schematic diagram of A in the application. 1, upper die holder; 101, first threaded hole; 2, lower die holder; 201, second threaded hole; 202, third threaded hole; 3, base; 4, ejection mechanism; 401, movable bottom plate; 402, ejector rod; 403, top plate; 404, guide rod; 405, second spring; 406, tapered groove; 5, ultrasonic assembly; 501, ultrasonic transducer; 502, amplitude transformer; 503, first end block; 504, ball head; 505, slide bar; 506, first spring; 507, first wedge block; 6, first vibration transmission component; 601, first threaded vibration transmission rod; 602, second end block; 7, driving mechanism; 701, annular track; 702, sliding block; 703, mounting frame; 8, positioning assembly; 801, annular support plate; 802, second wedge block; 9, second vibration transmission component; 901, second threaded vibration transmission rod; 902, connecting rod; 903, third end block; 904, tapered part. DETAILED DESCRIPTION

[0020] It is necessary to point out here that the following detailed description is only used to further illustrate the application and cannot be understood as limiting the protection scope of the application. Those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0021] Embodiment one In order to solve the problem of difficult demolding and easy damage of large plastic parts (such as automobile bumpers) of existing injection molds, please refer to Figures 1-2 The application provides an automobile bumper mold integrated with ultrasonic auxiliary demolding, which comprises an upper die holder 1, a lower die holder 2, a base 3 for fixing the lower die holder 2, and an ejection mechanism 4 arranged in the base 3, wherein the upper part of the ejection mechanism 4 penetrates through the lower die holder 2 and is used for pushing the bumper to separate from a cavity after injection molding, and the automobile bumper mold further comprises: An ultrasonic assembly 5 is arranged in a circumferential groove of the abutting surface of the upper die holder 1 and the lower die holder 2. A first vibration transmission component 6 is uniformly arranged around the upper die holder 1 and the lower die holder 2 and penetrates through the upper die holder 1 and the lower die holder 2, wherein the inner end of the first vibration transmission component 6 is matched with the outer contour of the bumper and forms an abutment, and the outer end of the first vibration transmission component 6 is matched with the ultrasonic assembly 5 and is used for transmitting the vibration of the ultrasonic assembly 5 to the side surface of the bumper. The driving mechanism 7 is fixed in the circumferential groove of the lower mold base 2, and is used to drive the ultrasonic assembly 5 to move along the circumference of the mold to sequentially contact each first vibration transmission part 6 to realize circumferential full-area ultrasonic vibration, and assist the ejection mechanism 4 to demold.

[0022] Before or at the beginning of the mold opening action, when the upper mold base 1 and the lower mold base 2 are still closed or just slightly opened (a gap of several millimeters to several centimeters), the ultrasonic assembly 5 and the driving mechanism 7 are started to drive the ultrasonic assembly 5 to move along the circumference of the mold. When the ultrasonic assembly 5 moves to the position of the first vibration transmission part 6, it contacts to form an acoustic coupling structure. The vibration generated by the ultrasonic assembly 5 is transmitted to the side of the bumper through the first vibration transmission part 6 to break the adhesion between the bumper and the mold cavity. After the completion of the circumferential full-area ultrasonic vibration, the ultrasonic assembly 5 is stopped, and then the upper mold base 1 is lifted to push the injection-molded bumper out of the cavity through the ejection mechanism 4. Through the circumferential movement of the ultrasonic assembly 5, the full-area vibration coverage is realized, and the first vibration transmission part 6 can accurately transmit vibration to the side of the bumper. The energy loss is low, the demolding resistance is significantly reduced, and the deformation and scratching problems of the bumper caused by excessive adhesion in the traditional ejection method are solved.

[0023] As shown in Figure 4 The ultrasonic assembly 5 is symmetrically provided along the circumference of the mold. Each ultrasonic assembly 5 includes two ultrasonic transducers 501 corresponding to the side walls of the upper mold base 1 and the lower mold base 2. The output end of each ultrasonic transducer 501 is fixedly provided with a variable amplitude rod 502, the distal end of the variable amplitude rod 502 is fixedly provided with a first end block 503, and the first end block 503 is provided with a ball head 504. It is worth mentioning that the ultrasonic generator is also used with the ultrasonic transducer 501. The ultrasonic generator is externally provided in a safe position near the mold (such as in a control cabinet), and is connected to the ultrasonic transducer 501 through a flexible cable.

[0024] The first vibration transmission part 6 includes a first threaded vibration transmission rod 601 and a second end block 602 fixedly provided on the outer end of the first threaded vibration transmission rod 601. The second end block 602 is provided with a spherical recess matched with the ball head 504 to form a spherical contact type acoustic coupling structure. The side wall of the upper mold base 1 is provided with a first screw hole 101 threadedly connected with the first threaded vibration transmission rod 601, and the side wall of the lower mold base 2 is provided with a second screw hole 201 threadedly connected with the first threaded vibration transmission rod 601 to realize detachable installation of the first vibration transmission part 6. This design facilitates quick replacement of the first vibration transmission part 6 when it is worn or damaged, without the need to disassemble the entire mold, thereby improving maintenance efficiency and the maintainability of the equipment.

[0025] The arrangement of the two groups of ultrasonic assemblies 5 can shorten the driving stroke and improve the efficiency, and the driving mechanism 7 only needs to drive each group of ultrasonic assemblies 5 to rotate half a circle to cover all the stations. The ultrasonic transducer 501 converts electric energy into high-frequency mechanical vibration through the amplitude rod 502 connected to the output end of the ultrasonic transducer 501, and the ball head 504 on the first end block 503 at the end of the amplitude rod 502 serves as a vibration output interface. The cooperation of the ball head 504 and the spherical recess can ensure stable transmission of vibration.

[0026] As shown in Figure 3 , Figure 6 , the driving mechanism 7 includes an annular track 701, a sliding block 702 slidingly arranged in the annular track 701, a mounting bracket 703 fixedly arranged on the top of the sliding block 702, and a driving unit for driving the sliding block 702 to move. In use, the driving unit drives the sliding block 702 to move along the annular track 701, and the sliding block 702 drives the mounting bracket 703 and the ultrasonic assembly 5 to move circumferentially along the mold. The driving unit can drive the sliding block 702 to move through a synchronous belt, a gear and rack, or a lead screw transmission mechanism. The working principle and specific structure of the prior art will not be described in detail here.

[0027] Further, the ultrasonic transducer 501 is slidingly arranged in the mounting bracket 703, and the side wall thereof is provided with a sliding strip 505 which is in guiding cooperation with a sliding groove of the mounting bracket 703. A first spring 506 is fixedly arranged between the ultrasonic transducer 501 and the mounting bracket 703. When the ultrasonic transducer 501 moves to the position of the first vibration transmission component 6, the ultrasonic transducer 501 is driven to move radially by an electric push rod or the like, so that the ball head 504 is clamped into the spherical recess.

[0028] Embodiment Two On the basis of embodiment one, in order to realize automatic positioning and coupling of the ball head 504 and the spherical recess and improve the efficiency of auxiliary demolding, as shown in Figures 5-6 , a positioning assembly 8 is further included for driving the ball head 504 to be clamped into the spherical recess when the ultrasonic assembly 5 moves to the position of the first vibration transmission component 6, so as to form an efficient and stable acoustic connection.

[0029] The positioning assembly 8 includes an annular support plate 801 and a plurality of second wedge-shaped blocks 802 fixedly arranged on the upper and lower surfaces of the annular support plate 801, each of the second wedge-shaped blocks 802 corresponding to one of the first vibration transmission components 6. A first wedge-shaped block 507 is fixedly arranged on the ultrasonic transducer 501 located on the opposite side of the first spring 506. The second wedge-shaped blocks 802 and the first wedge-shaped block 507 are in wedge-shaped transmission to drive the ultrasonic transducer 501 to move radially.

[0030] When the ultrasonic assembly 5 is moved into position, the inclined surface of the second wedge block 802 fixed on the annular support plate 801 corresponding to the current station begins to contact the inclined surface of the first wedge block 507 fixed on the ultrasonic transducer 501. With the continued slight forward movement or positioning locking of the sliding block 702, the inclined surface of the second wedge block 802 continuously presses the inclined surface of the first wedge block 507. Since the second wedge block 802 is fixed, the pushing effect of this inclined surface overcomes the elastic force of the first spring 506, driving the ultrasonic transducer 501 to move radially, the ultrasonic transducer 501 drives the amplitude rod 502, the first end block 503 and the ball head 504 to move, so that the ball head 504 is clamped into the spherical recess, and the ultrasonic vibration operation begins; after the vibration is completed, the second wedge block 802 is disengaged from the first wedge block 507, and the elastic force of the first spring 506 pulls the ultrasonic transducer 501 back to the original position, so that the ball head 504 is disengaged from the spherical recess.

[0031] Embodiment three On the basis of embodiment one and embodiment two, in order to further reduce the demolding resistance and improve the ultrasonic effect of the ultrasonic assembly 5, as shown in Figure 2 、 Figures 7-8 A plurality of second vibration transmission components 9 are uniformly arranged circumferentially along the lower mold base 2; the inner end of the second vibration transmission component 9 abuts against the ejection mechanism 4, and the outer end extends to the outside of the lower mold base 2, for transmitting the vibration of the ultrasonic assembly 5 to the bumper bottom surface through the ejection mechanism 4.

[0032] The second vibration transmission component 9 includes a second threaded vibration transmission rod 901, a connecting rod 902 fixedly arranged at the outer end of the second threaded vibration transmission rod 901, and a third end block 903 fixedly arranged at the end of the connecting rod 902; the third end block 903 is provided with a spherical recess matched with the ball head 504, and the height of the third end block 903 is flush with the second end block 602; the position corresponding to the second vibration transmission component 9 of the positioning assembly 8 is also provided with a second wedge block 802; the side wall of the lower mold base 2 is provided with a third screw hole 202 threadedly connected with the second threaded vibration transmission rod 901.

[0033] The ejection mechanism 4 includes a movable bottom plate 401, a top rod 402 fixedly arranged at the top of the movable bottom plate 401, and a guide rod 404 fixedly arranged at the corner of the top of the movable bottom plate 401; the top end of the top rod 402 is fixedly arranged with a top plate 403, the top plate 403 is provided with a tapered groove 406, the inner end of the second threaded vibration transmission rod 901 is provided with a tapered portion 904 matched with the tapered groove 406, forming a tapered surface contact type vibration transmission structure, and the guide rod 404 is sleeved with a second spring 405 for resetting the movable bottom plate 401.

[0034] When the ultrasonic vibration loosening is completed, the ejector cylinder pushes the movable base 401 to move upward, the top rod 402 and the guide rod 404 on the top of the movable base 401 synchronously rise, the top plate 403 on the top end of the top rod 402 contacts and pushes the bumper to move upward, the stable ejection is realized, and the second spring 405 on the guide rod 404 provides a reset force to ensure that the movable base 401 can be reset smoothly after the ejection is completed.

[0035] The driving mechanism 7 drives the ultrasonic assembly 5 to move along the annular track 701 to a certain second vibration transmission component 9, at this time, the second wedge block 802 in the positioning assembly 8 acts with the first wedge block 507 fixed on the ultrasonic transducer 501 to push the ultrasonic transducer 501 radially to the second vibration transmission component 9, the ball head 504 at the end of the horn 502 is clamped into the spherical recess at the end of the second vibration transmission component 9 to form a close contact, then the ultrasonic transducer 501 and the horn 502 transmit high-frequency vibration to the second vibration transmission component 9, and the second threaded vibration transmission rod 901 of the second vibration transmission component 9 transmits the vibration to the tapered groove 406 on the top plate 403 of the ejecting mechanism 4 through the tapered portion 904 at the inner end, and the tapered surface contact type vibration transmission structure ensures effective transmission of vibration energy and effectively loosens the adhesion between the bumper and the lower mold base 2.

[0036] The above-described embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A car bumper mold with integrated ultrasonic-assisted demolding, comprising an upper mold base (1), a lower mold base (2), a base (3) for fixing the lower mold base (2), and an ejection mechanism (4) disposed within the base (3), wherein the upper part of the ejection mechanism (4) penetrates through the lower mold base (2) and is used to push the bumper out of the mold cavity after injection molding, characterized in that, Also includes: The ultrasonic component (5) is located in the peripheral groove of the mating surface of the upper mold base (1) and the lower mold base (2); The first vibration transmission component (6) is evenly distributed in multiple ways along the circumference of the upper mold base (1) and the lower mold base (2), and penetrates the upper mold base (1) and the lower mold base (2). The inner end of the first vibration transmission component (6) is adapted to the outer contour of the bumper and forms a fit, and the outer end is adapted to the ultrasonic component (5) to transmit the vibration of the ultrasonic component (5) to the side of the bumper. The driving mechanism (7) is fixedly installed in the circumferential groove of the lower mold base (2) and is used to drive the ultrasonic component (5) to move along the circumferential direction of the mold so as to contact each of the first vibration transmission components (6) in sequence to achieve circumferential full-range ultrasonication and assist the ejection mechanism (4) in demolding.

2. The automotive bumper mold with integrated ultrasonic-assisted demolding as described in claim 1, characterized in that, The ultrasonic components (5) are symmetrically arranged in two sets along the circumference of the mold; Each ultrasonic component (5) includes two ultrasonic transducers (501), which are respectively disposed on the side walls of the upper mold base (1) and the lower mold base (2). Each ultrasonic transducer (501) has an amplitude transformer (502) fixedly disposed at its output end. The end of the amplitude transformer (502) is fixedly disposed on a first end block (503), and a ball head (504) is disposed on the first end block (503).

3. The automotive bumper mold with integrated ultrasonic-assisted demolding according to claim 2, characterized in that, The first vibration transmission component (6) includes a first threaded vibration transmission rod (601) and a second end block (602) fixedly disposed on the outer end of the first threaded vibration transmission rod (601). The second end block (602) has a spherical recess that is adapted to the ball head (504). The side wall of the upper mold base (1) is provided with a first screw hole (101) that is threadedly connected to the first threaded vibration transmission rod (601), and the side wall of the lower mold base (2) is provided with a second screw hole (201) that is threadedly connected to the first threaded vibration transmission rod (601).

4. The automotive bumper mold with integrated ultrasonic-assisted demolding according to claim 2, characterized in that, The drive mechanism (7) includes an annular track (701), a slider (702) slidably disposed in the annular track (701), a mounting bracket (703) fixedly disposed on the top of the slider (702), and a drive unit for driving the slider (702) to move.

5. The automotive bumper mold with integrated ultrasonic-assisted demolding according to claim 4, characterized in that, The ultrasonic transducer (501) is slidably disposed in the mounting bracket (703), and its side wall is provided with a slide bar (505). A first spring (506) is fixed between the ultrasonic transducer (501) and the mounting bracket (703).

6. The automotive bumper mold with integrated ultrasonic-assisted demolding according to claim 5, characterized in that, It also includes a positioning component (8) for driving the ball head (504) to engage in the spherical recess when the ultrasonic component (5) moves to the position of the first vibration transmission component (6); The positioning component (8) includes an annular support plate (801) and a plurality of second wedge blocks (802) fixed on the upper and lower surfaces of the annular support plate (801), each of the second wedge blocks (802) corresponding to the first vibration transmission component (6); A first wedge block (507) is fixedly provided on the ultrasonic transducer (501) located on the opposite side of the first spring (506). The second wedge block (802) and the first wedge block (507) are driven in a wedge-shaped manner to drive the ultrasonic transducer (501) to move radially.

7. A car bumper mold with integrated ultrasonic-assisted demolding according to claim 6, characterized in that, It also includes multiple second vibration transmission components (9) evenly distributed along the circumference of the lower mold base (2); The inner end of the second vibration transmission component (9) abuts against the ejection mechanism (4), and the outer end extends to the outside of the lower mold base (2) to transmit the vibration of the ultrasonic component (5) to the bottom surface of the bumper via the ejection mechanism (4).

8. A car bumper mold with integrated ultrasonic-assisted demolding according to claim 7, characterized in that, The second vibration transmission component (9) includes a second threaded vibration transmission rod (901), a connecting rod (902) fixedly disposed at the outer end of the second threaded vibration transmission rod (901), and a third end block (903) fixedly disposed at the end of the connecting rod (902). The third end block (903) has a spherical recess that matches the ball head (504). The height of the third end block (903) is flush with that of the second end block (602). The positioning component (8) also has a second wedge block (802) at the position corresponding to the second vibration transmission component (9). The side wall of the lower mold base (2) is provided with a third screw hole (202) that is threadedly connected to the second threaded vibration rod (901).

9. A car bumper mold with integrated ultrasonic-assisted demolding according to claim 8, characterized in that, The ejection mechanism (4) includes a movable base plate (401), a top rod (402) fixedly installed on the top of the movable base plate (401), and a guide rod (404) fixedly installed at the top corner of the movable base plate (401). The top of the top rod (402) is fixedly provided with a top plate (403), and a tapered groove (406) is provided on the top plate (403). The inner end of the second threaded vibration transmission rod (901) is provided with a tapered part (904) that is adapted to the tapered groove (406). A second spring (405) is sleeved on the guide rod (404).

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