Demolding mechanism for vehicle rear bumper and molding die
By utilizing the demolding mechanism of the vehicle's rear bumper, which incorporates multiple ejector parts and elastic components, the problem of difficult demolding of rear bumpers with large license plate positions is solved, achieving an efficient and damage-free demolding process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG LEAPMOTOR TECH CO LTD
- Filing Date
- 2023-10-27
- Publication Date
- 2026-07-31
AI Technical Summary
In existing technologies, rear bumpers with large license plate positions may fail to demold due to insufficient space, resulting in weak mold structure, insufficient cooling, product surface defects, or affecting mold mass production.
The demolding mechanism for the vehicle rear bumper includes an ejection mechanism, which consists of a first ejector and a second ejector that are movably connected to each other. Through a multi-part structural design, it utilizes elastic components and a drive mechanism to achieve gradual demolding, thus avoiding damage to the product from pulling forces.
This technology enables successful demolding without altering the structure of other molding dies, avoiding product damage and improving both demolding efficiency and product quality.
Smart Images
Figure CN117445320B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of injection molds for automotive parts, and in particular to a demolding mechanism and molding die for a vehicle rear bumper. Background Technology
[0002] Currently, in the industry, when demolding the rear bumper, the injection mold for the bumper often uses a combination of angled ejectors and straight ejectors. The molded product is ejected from the mold in one ejection and then removed from the mold.
[0003] However, as time has passed, it has been discovered that for rear bumpers with a large license plate area, the narrow space at the license plate location can prevent the mold from being demolded, or the insufficient space can lead to weak mold structure strength, insufficient cooling, product surface defects, or problems affecting the mass production of the mold. Summary of the Invention
[0004] This application provides a demolding mechanism and molding die for a vehicle rear bumper, which solves the problem that the area on the demolding mechanism is difficult to demold when the license plate position is narrow.
[0005] To address the aforementioned technical problems, this application proposes a demolding mechanism for a vehicle rear bumper. The demolding mechanism includes an ejection mechanism comprising a first ejector and a second ejector connected to each other. The first and second ejector together form at least a portion of the mold core, and the vehicle rear bumper is formed and connected to the mold core. The second ejector includes a first straight ejector block, a second straight ejector block, a push-connecting block, a first elastic component, and a second elastic component. The push-connecting block is located between the first and second straight ejector blocks and abuts against both the first and second straight ejector blocks. The first, second, and push-connecting blocks together constitute at least a portion of the mold core. The first elastic component elastically abuts against the push-connecting block, and the elastic abutting force of the first elastic component forces the push-connecting block to abut against and connect to the second straight push block; the second elastic component is installed inside the push-connecting block and abuts against and connects to the first straight push block, and the elastic force between the second elastic component and the push-connecting block forces the second elastic component to move away from the first straight push block. A driving mechanism drives the first ejector and the second ejector to move simultaneously away from the bottom of the demolding mechanism to a first position, and then continues to drive the first and second straight push blocks to move sequentially to a second position and a third position. Along the direction of gravity, the third position, the second position, and the first position are arranged sequentially from high to low. During the transition from the first position to the second position, the pushing connecting block moves together with the first and second straight abutments under the action of the first elastic component, the first straight abutment block, and the second straight abutment block. In the second position, the elastic abutting force of the first elastic component decreases to a preset value, and the second elastic component moves away from the first straight abutment block under the action of its elastic force to disengage from the abutting connection with the first straight abutment block. During the transition from the second position to the third position, the pushing connecting block stops moving, and the first and second straight abutments move together simultaneously.
[0006] Specifically, both the push-connecting block and the second straight-pushing block include abutting inclined surfaces, which slide against each other. The direction of the elastic abutting force of the first elastic component forms an acute angle or a right angle with the abutting inclined surface.
[0007] Specifically, the second elastic component includes a sliding block and an elastic element. The sliding block is movably mounted on the push-connecting block and abuts against the first straight-push block. The elastic element is mounted on the push-connecting block and elastically abuts against the push-connecting block and the sliding block. In the second position, the elastic element pushes the sliding block to move away from the first straight-push block until it disengages from the abutting connection with the first straight-push block.
[0008] Specifically, the push-connecting block includes a pushing inclined surface and an abutting surface opposite to the pushing inclined surface. The pushing inclined surface faces the second straight push block and can abut against and connect to the second straight push block. The push-connecting block also includes a mounting through hole that penetrates the pushing inclined surface and the abutting surface of the push-connecting block. The sliding block and the elastic element are both accommodated within the mounting through hole. The direction of the elastic pushing force of the first elastic element forms an acute angle or a right angle with the pushing inclined surface.
[0009] Specifically, the first straight abutment block includes a mating surface facing the pushing connecting block, the mating surface including a step facing the pushing connecting block. The sliding block includes a shaped end block facing the first straight abutment block, the shaped end block abutting against the mating surface.
[0010] Specifically, it also includes a base, and both the first ejector and the second ejector are movably connected to the base. The first elastic component includes a fixing member and a first elastic member. The fixing member is fixedly connected to the base. The first elastic member is disposed on the fixing member and elastically abuts against the fixing member and the push-connecting block.
[0011] Specifically, the base includes a first lifting platform, a second lifting platform, and a mold base, both of which can move away from the mold base. The driving mechanism includes a first driving member and a second driving member, the first driving member connecting the first lifting platform and the first ejector, and the second driving member connecting the second lifting platform and the second ejector. The first straight ejector block and the second straight ejector block are fixedly connected to the second lifting platform. The fixing member is fixedly connected to the mold base.
[0012] Specifically, the fixing member includes a hollow channel and a limiting member. The limiting member is partially housed within the hollow channel, and the first elastic member is fitted onto a portion of the limiting member and abuts against one end of the fixing member.
[0013] Another technical solution proposed in this application is: providing a molding die, wherein the molding die includes a first die and a second die that cooperate with each other. The first die has a mold cavity. The molding die further includes a demolding mechanism, which is any of the demolding mechanisms described above. The demolding mechanism is disposed on the second die, and the first ejector and the second ejector are installed in the mold cavity and together with the inner wall of the mold cavity form a mold surface.
[0014] Specifically, the first mold also has a channel communicating with the mold cavity. The molding die also includes a core-pulling block, which is housed within the channel and can move along the channel.
[0015] The beneficial effects of this application are as follows: Compared with the existing demolding mechanism for vehicle rear bumpers, the demolding mechanism for vehicle rear bumpers proposed in this application includes an ejection mechanism. The ejection mechanism includes a first ejector and a second ejector connected to each other. The first and second ejector together form at least a portion of the mold core, and the vehicle rear bumper is formed and connected to the mold core. The second ejector includes a first straight ejector block, a second straight ejector block, a push connecting block, a first elastic component, and a second elastic component. By dividing the second ejector into multiple parts and using different structures to separate it from the molded product, the thinner finished product is not subjected to the pulling force generated when the second ejector is demolded together, thereby avoiding damage to the product during demolding. The push connecting block is located between the first and second straight ejector blocks and abuts against the first and second straight ejector blocks respectively. The first straight ejector block, the second straight ejector block, and the push connecting block together constitute at least a portion of the mold core, and the product is formed on this mold core. The first elastic component abuts against the push-connecting block, and the elastic force of the first elastic component forces the push-connecting block to abut against and connect to the second straight push block. The second elastic component is installed inside the push-connecting block and abuts against and connects to the first straight push block. The elastic force between the second elastic component and the push-connecting block forces the second elastic component to move away from the first straight push block, causing a relative movement tendency between the second ejector and the push-connecting block, thereby realizing the detachment of the entire second ejector from the product. The drive mechanism drives the first and second ejectors to move simultaneously away from the bottom of the demolding mechanism to the first position, and then continues to drive the first and second straight push blocks to move together to the second and third positions in sequence. Along the direction of gravity, the third, second, and first positions are set from high to low. During the transition from the first position to the second position, the pusher connecting block moves together with the first and second straight push blocks under the action of the first elastic component, the first straight push block, and the second straight push block. In the second position, the elastic resisting force of the first elastic component decreases to a preset value, and the second elastic component moves away from the first straight push block under the action of its elastic force until it disengages from the resisting connection with the first straight push block. During the transition from the second position to the third position, the pusher connecting block stops moving, and the first and second straight push blocks move together simultaneously. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:
[0017] Figure 1 This is a schematic diagram of the structure of one embodiment of the demolding mechanism for the rear bumper of a vehicle provided in this application;
[0018] Figure 2 yes Figure 1 Exploded view of the demolding mechanism for the rear bumper of the vehicle described in the figure;
[0019] Figure 3 This is a schematic diagram of the structure of a molding die provided in this application;
[0020] Figure 4 yes Figure 3 An enlarged structural diagram of circle A described in the text. Detailed Implementation
[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0022] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.
[0023] One aspect of this application provides a molding die, please refer to the following: Figure 1 , Figure 2 as well as Figure 3 , Figure 1 This is a schematic diagram of the structure of one embodiment of the demolding mechanism for the rear bumper of a vehicle provided in this application; Figure 2 yes Figure 1 Exploded view of the demolding mechanism for the rear bumper of the vehicle described in the figure; Figure 3 This is a schematic diagram of the structure of a molding die provided in this application. In some embodiments, the molding die includes a first mold 20 and a second mold 30 that cooperate with each other. The first mold 20 has a mold cavity 200. The molding die also includes a demolding mechanism disposed on the second mold 30. The demolding mechanism includes an ejection mechanism 1, which includes a first ejector 11 and a second ejector 12. The first ejector 11 and the second ejector 12 are installed in the mold cavity 200 and together with the inner wall of the mold cavity 200 form a model surface. The desired vehicle bumper model is formed by injection molding onto the model surface using a common injection molding method. After the first mold 20 and the second mold 30 are opened, the product is ejected and demolded using the demolding mechanism to remove the product.
[0024] In some embodiments, the first mold 20 is further provided with a channel 201 communicating with the mold cavity 200. The molding mold also includes a core-pulling block 40, which is housed in the channel 21 and can move along the channel 201. When the molding mold is closed for injection molding, the core-pulling block 40 abuts against the second ejector 12 along with the first mold 20. After the molding mold is opened, it disengages from the second ejector 12 as the first mold 20 moves away, ensuring that the product structure formed at the channel 201 will not have defects due to subsequent ejection.
[0025] Another aspect of this application provides a demolding mechanism for a vehicle rear bumper; please refer to the references thereto. Figure 1 and Figure 2Specifically, in some embodiments, the demolding mechanism for the vehicle rear bumper includes an ejection mechanism 1 and a drive mechanism 2. The ejection mechanism 1 includes a first ejector 11 and a second ejector 12 that are movably connected to each other. The first ejector 11 and the second ejector 12 together form at least a portion of the mold core 13. The vehicle rear bumper is molded and connected to the mold core 13. When the demolding mechanism ejects the first ejector 11 and the second ejector 12 according to the corresponding operation, the molded product located on the mold core 13 is removed to form the vehicle rear bumper product. The second ejector 12 includes a first straight ejector block 121, a second straight ejector block 122, a push connecting block 123, a first elastic component 124, and a second elastic component 125. By dividing the second ejector 12 into multiple parts, compared to the commonly used straight ejector structure, the original straight ejector structure is broken down into multiple different structures. These different structures are then sequentially ejected from the molded product according to their respective steps. This prevents the thinner finished product from being subjected to the pulling force generated when the second ejector 12 demolds together, thus avoiding damage to the product during demolding. The push-connecting block 123 is located between the first straight ejector block 121 and the second straight ejector block 122, and abuts against both the first and second straight ejector blocks 121 and 122 respectively. These three components are independent and assembled into a suitable straight ejector structure. The first straight ejector block 121, the second straight ejector block 122, and the push-connecting block 123 together constitute at least part of the mold core 13. The product is formed on this mold core 13, enabling the formation of thinner products without altering the general structure of other molding dies. The first elastic component 124 elastically abuts against the push connecting block 123, and the elastic abutting force of the first elastic component 124 forces the push connecting block 123 to abut against and connect to the second straight push block 122. The second elastic component 125 is installed inside the push connecting block 123 and abuts against and connects to the first straight push block 121, so as to achieve a tight abutment between the first straight push block 121 and the push connecting block 123, preventing the injection material from entering from the connection gap between the two during injection molding, which would cause burrs in the product and waste of injection material. Moreover, when the molding mold opens and the demolding mechanism starts to work, the elastic force between the second elastic component 125 and the push connecting block 123 will force the second elastic component 125 to move away from the first straight push block 121, so that there is a tendency for relative movement between the second ejector 12 and the push connecting block 123, thereby realizing the separation of the entire second ejector 12 from the product. After the drive mechanism 2 drives the first ejector 11 and the second ejector 12 to move away from the bottom of the demolding mechanism to the first position, it continues to drive the first straight ejector block 121 and the second straight ejector block 122 to move to the second and third positions in sequence. Along the direction of gravity, the third position, the second position and the first position are set in order from high to low.During the transition from the first position to the second position, the push-connecting block 123 moves together with the first and second straight push blocks 121 and 122 under the action of the first elastic component 124, the first straight push block 121, and the second straight push block 122. In the second position, the elastic resisting force of the first elastic component 124 decreases to a preset value, and the push-connecting block 123 is no longer under balanced force, exhibiting a downward tendency. Under the action of its elastic force, the second elastic component 125 moves away from the first straight push block 121 until it disengages from the resisting connection with the first straight push block 121. During the transition from the second position to the third position, the push-connecting block 123 stops moving, and the first and second straight push blocks 121 and 122 move together simultaneously. Understandably, in the first position, which is the first ejection in general technology, the first ejector 11 and the second ejector 12 are disengaged from the second mold 30 under the drive of the drive mechanism 2. In the second position, under the drive of the drive mechanism 2, the second ejector 12 is ejected again as a whole, pushing the second ejector 12 upward by 15-30mm, specifically 15mm, 20mm, 25mm, 30mm, etc., with an optimal ejection distance of 20mm. Under the action of the second elastic component 125, the first ejector block... The contact between 121 and the push connecting block 123 loosens and disengages from the fixed position; in the third position, that is, under the continued drive of the drive mechanism 2, the second ejector 12 continues to be pushed upward by 40-60mm, specifically 40mm, 45mm, 50mm, 55mm, or 60mm, with the optimal ejection distance being 50mm. At this time, the push connecting block 123 moves downward relative to the connecting surface with the second straight push block 122, causing the push connecting block 123 to detach from the product, and then the second straight push block 122 is detached from the product, and the product is removed.
[0026] In some embodiments, please continue to refer to Figure 2The push-connecting block 123 and the second straight push block 122 both include abutting inclined surfaces 1220. The abutting inclined surfaces 1220 slide against each other, facilitating relative sliding and separation between the push-connecting block 123 and the second straight push block 122. The direction of the elastic abutting force of the first elastic component 124 is at an acute angle or a right angle to the abutting inclined surface 1220. The first elastic component 124 is designed to provide power for the upward movement of the push-connecting block 123 by utilizing its tendency to recover its deformation. When the direction of the elastic abutting force of the first elastic component 124 is at an acute angle to the abutting inclined surface 1220 and along the direction of gravity, the first elastic component 124 provides a vertically upward elastic force to the push-connecting block 123, thereby assisting in driving the push-connecting block 123 to move upward with the first straight push block 121 and the second straight push block 122. In other embodiments, when the direction of the elastic resisting force of the first elastic component 124 is perpendicular to the resisting inclined surface 1220, or is not along the direction of gravity but is still set at an acute angle to the resisting inclined surface 1220, the elastic resisting force of the first elastic component 124 has a vertically upward component force on the pushing connecting block 123, thereby assisting in driving the pushing connecting block 123 to move upward with the first straight pushing block 121 and the second straight pushing block 122.
[0027] In some embodiments, please refer to Figure 2 and Figure 4 , Figure 4 yes Figure 3 The diagram shows an enlarged view of circle A. The second elastic component 125 includes a sliding block 1251 and an elastic element 1252. The sliding block 1251 is movably mounted on the push connecting block 123 and abuts against the first straight push block 121. The sliding block 1251 also fixes the push connecting block 123 and the first straight push block 121 to the product. The elastic element 1252 is mounted on the push connecting block 123 and elastically abuts against the push connecting block 123 and the sliding block 1251. During the secondary ejection, when the second ejector 12 moves upward by 20mm, i.e., is in the second position, the elastic element 1252 restores its deformation and generates an elastic force to push the sliding block 1251 away from the first straight push block 121 until it disengages from the abutting connection with the first straight push block 121, facilitating the separate demolding of the first straight push block 121 and the push connecting block 123. When the molding die needs to form a thinner product, it can still ensure that the product is demolded without damage.
[0028] Furthermore, the push-connecting block 123 includes an abutting slope 1220 and an abutting surface 1221 opposite to the abutting slope 1220. The abutting slope 1220 is disposed facing the second straight push block 122 and can abut against and connect to the second straight push block 122. The push-connecting block 123 also includes a mounting through hole 1230, which penetrates the abutting slope 1220 and the abutting surface 1221 of the push-connecting block 123. The sliding block 1251 and the elastic element 1252 are both accommodated in the mounting through hole 1230. When moving from the first position to the second position, the elastic element 1252 is no longer subjected to the additional force of the first mold 20, has the tendency to recover its deformation, and generates a horizontal elastic force on the sliding block 1251, pushing the sliding block 1251 to disengage from the first straight push block 121, thereby pushing the first straight push block 121 to abut against the push-connecting block 123, realizing the separation and demolding of the second ejector 12. The direction of the elastic resisting force of the first elastic component 124 is at an acute angle or a right angle to the resisting inclined surface 1220. The elastic resisting force of the first elastic component 124 has a vertically upward component force or a direct vertically upward force on the pushing connecting block 123, thereby assisting in driving the pushing connecting block 123 to move upward along with the first straight pushing block 121 and the second straight pushing block 122.
[0029] In some embodiments, please refer to Figure 2 and Figure 4 The first top block 121 includes a mating surface (not shown) facing the push connecting block 123. The mating surface includes a step (not shown) facing the push connecting block 123. The sliding block 1251 includes a molded end block 1250 facing the first top block 121. The molded end block 1250 abuts against the mating surface. When in the second position, the elastic member 1252 has a tendency to recover its deformation, so that the step abutting against the mating surface disengages from the first top block 121, thereby releasing the abutting connection between the push connecting block 123 and the first top block 121.
[0030] Understandably, the end of the sliding block 1251 facing the second straight push block 122 includes an inclined surface (not shown in the figure). This inclined surface is configured to cooperate with the abutting inclined surface 1220 of the second straight push block 122. When there is a tendency for relative movement between the sliding block 1251 and the first straight push block 121, as the second position moves to the third position, the inclined surface and the abutting inclined surface 1220 move relative to each other, so that the push connecting block 123 can quickly disengage from the second straight push block 122, thereby accelerating the demolding speed of the entire molding die.
[0031] Furthermore, please continue to refer to Figure 2The elastic element 1252 may not be provided in the mounting through hole 1230. In some embodiments, the push connecting block 123 also includes a connector 1231. The connector 1231 passes through the mounting through hole 1230, and the elastic element 1252 is fitted on the connector 1231. One end of the connector 1231 abuts against the second straight push block 122, and there is a 2-5mm gap between one end of the connector 1231 and the end face of the mounting through hole 1230. This allows the connector 1231 to move a certain distance when the push connecting block 123 is no longer subjected to the elastic action of the first elastic component 124 and the elastic element 1252 recovers its deformation. This ensures that the sliding block 1251 is subjected to a horizontal elastic force, causing the step to disengage from the first straight push block 121, thereby realizing the disengagement and abutment connection between the push connecting block 123 and the first straight push block 121.
[0032] In some embodiments, the demolding mechanism further includes a base 3, and the first ejector 11 and the second ejector 12 are both movably connected to the base 3. The first elastic component 124 includes a fixing member 1241 and a first elastic member 1242, and the fixing member 1241 is fixedly connected to the base 3. The first elastic element 1242 is disposed on the fixed element 1241 and elastically abuts against the fixed element 1241 and the push connecting block 123. When the first straight push block 121, the push connecting block 123 and the second straight push block 122 move upward simultaneously, the fixed element 1241 will not move upward synchronously. When moving from the first position to the second position and from the second position to the third position, the first elastic element 1242 generates a tendency to recover its deformation due to the upward movement of the push connecting block 123. As the push connecting block 123 moves upward, until the first elastic element 1242 completely recovers its deformation and no longer generates elastic force on the push connecting block 123, the second straight push block 122 and the push connecting block 123 continue to move upward until relative movement occurs between them. The push connecting block 123 slides downward at an angle until it disengages from the second straight push block 122, completing the separation and demolding of the second ejector 12.
[0033] Furthermore, in order to ensure the smooth rising or falling of the drive mechanism 2 among the various structures on the drive base 3, in some embodiments, please continue to refer to... Figure 3The base 3 includes a first lifting platform 31, a second lifting platform 32, and a mold base 33. Both the first lifting platform 31 and the second lifting platform 32 can move away from the mold base 33, causing the first ejector 11 and the second ejector 12 to reach the first position, the second position, and the third position, respectively, completing the first and second ejection of the molding die. The drive mechanism 2 includes a first drive member 21 and a second drive member 22. The first drive member 21 connects the first lifting platform 31 and the first ejector 11, and the second drive member 22 connects the second lifting platform 32 and the second ejector 12. The first straight ejector block 121 and the second straight ejector block 122 are fixedly connected to the second lifting platform 32, and the fixing member 1241 is fixedly connected to the mold base 33. In this process, the first driving component 21 and the second driving component 22 jointly propel the first lifting platform 31 and the second lifting platform 32 away from the mold base, so that the first ejector 11 and the second ejector 12 reach the first position; the second driving component 22 drives the second lifting platform 32 away from the first lifting platform 31 to continue moving, so that the second ejector 12 reaches the second position and the third position respectively, and after the product is completely demolded and removed, they descend sequentially until they return to their original positions.
[0034] In some embodiments, please continue to refer to Figure 4 The fixing member 1241 includes a hollow channel 12411 and a limiting member 12412. The limiting member 12412 is partially housed within the hollow channel 12411. A first elastic member 1242 is fitted onto a portion of the limiting member 12412 and abuts against one end of the fixing member 1241. When moving from the first position to the second position, the first elastic member 1242 recovers its deformation. The limiting member 12412 moves upward synchronously within the hollow channel 12411 along with the movement of the push connecting block 123. When the limit member 12412 reaches the limiting position, it restricts the push connecting block 123 from moving upward together with the first straight push block 121 and the second straight push block 122. At this time, the push connecting block 123 has disengaged from the abutting connection between it and the first straight push block 121. When the second lifting platform 32 continues to drive the first straight push block 121 and the second straight push block 122 to move upward, the push connecting block 123 moves obliquely downward relative to the second straight push block 122, thus completing the demolding of the push connecting block 123.
[0035] Understandably, since molding dies often require water cooling, cooling water pipes are also required inside the molding die. In some embodiments, the cooling water pipes can be formed by the hollow channel 12411 inside the fixing member 1241. Alternatively, a cooling water channel connecting the inside of the mold cavity 200 can be provided as needed to cool the injection molding material until the rear bumper product is formed.
[0036] In the description of this application, the references to terms such as "some embodiments," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least some embodiments or examples of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0037] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. A demolding mechanism for a vehicle rear bumper, characterized in that, include: An ejection mechanism, comprising a first ejector and a second ejector connected to each other, wherein the first ejector and the second ejector together form at least a portion of the mold core, and the vehicle rear bumper is formed and connected to the mold core; The second ejector includes a first ejector block, a second ejector block, a push-connecting block, a first elastic component, and a second elastic component; wherein, the push-connecting block is located between the first ejector block and the second ejector block, and abuts against the first ejector block and the second ejector block respectively, and the first ejector block, the second ejector block, and the push-connecting block together constitute at least a portion of the mold core; The first elastic component abuts against the push-connecting block, and the elastic abutting force of the first elastic component forces the push-connecting block to abut against and connect to the second straight push block; the second elastic component is installed inside the push-connecting block and abuts against and connects to the first straight push block, and the elastic force between the second elastic component and the push-connecting block will force the second elastic component to move away from the first straight push block; A driving mechanism drives the first ejector and the second ejector to move simultaneously away from the bottom of the demolding mechanism to a first position, and then continues to drive the first straight ejector block and the second straight ejector block to move sequentially to a second position and a third position. Along the direction of gravity, the third position, the second position, and the first position are arranged sequentially from high to low. During the process from the first position to the second position, the push connecting block moves together with the first straight push block and the second straight push block under the action of the first elastic component, the first straight push block and the second straight push block; In the second position, the elastic abutting force of the first elastic component is reduced to a preset value, and the second elastic component moves away from the first straight abutting block under the action of its elastic force to disengage from the abutting connection with the first straight abutting block; During the transition from the second position to the third position, the pusher block stops moving, while the first pusher block and the second pusher block move together simultaneously.
2. The demolding mechanism according to claim 1, characterized in that, Both the push-connecting block and the second straight push block include abutting inclined surfaces, which slide against each other. The direction of the elastic resisting force of the first elastic component is at an acute angle or a right angle to the resisting inclined surface.
3. The demolding mechanism according to claim 1, characterized in that, The second elastic component includes a sliding block and an elastic element. The sliding block is movably mounted on the push connecting block and abuts against the first straight push block. The elastic element is mounted on the push connecting block and elastically abuts against the push connecting block and the sliding block. In the second position, the elastic element pushes the sliding block away from the first straight block to move away from the abutting connection with the first straight block.
4. The demolding mechanism according to claim 3, characterized in that, The push-connecting block includes a push-up inclined surface and an abutting surface opposite to the push-up inclined surface. The push-up inclined surface is disposed facing the second straight push block and can push against and connect to the second straight push block. The push-connecting block also includes a mounting through hole, which penetrates the abutting inclined surface and the abutting surface of the push-connecting block; Both the sliding block and the elastic element are housed within the mounting through hole; The direction of the elastic resisting force of the first elastic component is at an acute angle or a right angle to the resisting inclined surface.
5. The demolding mechanism according to claim 3 or 4, characterized in that, The first straight push block includes a mating surface facing the push connecting block, and the mating surface includes a step facing the push connecting block; The sliding block includes a molded end block facing the first straight abutment block, and the molded end block abuts against the mating surface.
6. The demolding mechanism according to any one of claims 1-4, characterized in that, It also includes a base, and both the first ejector and the second ejector are movably connected to the base; The first elastic component includes a fixing member and a first elastic member; The fastener is fixedly connected to the base; The first elastic element is disposed on the fixed element and elastically abuts against the fixed element and the push-connecting block.
7. The demolding mechanism according to claim 6, characterized in that, The base includes a first lifting platform, a second lifting platform, and a mold base, and both the first lifting platform and the second lifting platform can move away from the mold base. The driving mechanism includes a first driving member and a second driving member. The first driving member is connected to the first lifting platform and the first ejector, and the second driving member is connected to the second lifting platform and the second ejector. The first straight-push block and the second straight-push block are fixedly connected to the second lifting platform; The fastener is fixedly connected to the mold base.
8. The demolding mechanism according to claim 6, characterized in that, The fastener includes a hollow channel and a limiting member. The limiting member is partially housed within the hollow channel, and the first elastic member is fitted onto a portion of the limiting member and abuts against one end of the fastener.
9. A molding die, characterized in that, This includes the first and second modules that work together. The first mold has a mold cavity; The molding die further includes a demolding mechanism, which is the demolding mechanism described in any one of claims 1-8. The demolding mechanism is disposed on the second mold, and the first ejector and the second ejector are installed in the mold cavity and together with the inner wall of the mold cavity form a mold surface.
10. The molding die according to claim 9, characterized in that, The first mold is also provided with a channel communicating with the mold cavity; The molding die also includes a core-pulling block, which is housed within the channel and can move along the channel.