Ejection device for mold

Abstract

The ejection device comprises an upper mold body, a lower mold body, a forming device and a telescopic device, the upper mold body, the lower mold body and the forming device are matched with one another to form a cavity used for forming a needed handle, the forming device is used for forming an arc-shaped notch of the handle, and the telescopic device is vertically installed in the lower mold body; the forming device is horizontally arranged and connected with the output end of the telescopic device. The mold has the beneficial effects that ejection and demolding of a product are achieved through cooperation of the telescopic device and the forming device, a conventional ejector pin mechanism does not need to be arranged on the mold body, in this way, the influence of an ejector pin on a mold cavity is avoided, meanwhile, the inner structure of the lower mold cannot be complex, and the mold is convenient to use. Furthermore, a better installation design space can be provided for other parts, so that the service life of the mold is prolonged, the reliability of the mold is improved, the maintenance cost and the operation complexity of the mold are reduced, and the mold is more convenient to maintain and operate.

Description

Technical Field

[0001] This application relates to the field of mold technology, and in particular to an injection mold for a handle. Background Technology

[0002] Injection molds are tools used to produce plastic products; they also give plastic products their complete structure and precise dimensions. Injection molding is a processing method used for the mass production of certain complex-shaped parts. Specifically, it refers to injecting molten plastic into a mold cavity under high pressure using an injection molding machine, and then cooling and solidifying it to obtain the molded product.

[0003] Existing molds generally require an ejector pin mechanism to eject (handle) products from the lower mold. However, ejector pins are relatively thin and are prone to damage after long-term use. In addition, the large number of ejector pins located in the lower mold occupies a lot of space, which is not conducive to the installation of cooling water pipes. Therefore, an ejection device for molds is proposed to solve the above technical problems. Utility Model Content

[0004] One of the objectives of this application is to provide an ejection device for a mold.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: an ejection device for a mold, comprising an upper mold, a lower mold, a forming device, and a telescopic device. The upper mold, the lower mold, and the forming device cooperate to form a cavity for forming a handle required for molding. The forming device is used to form an arc-shaped groove for the handle. The telescopic device is vertically installed inside the lower mold, and the forming device is horizontally arranged and connected to the output end of the telescopic device. During demolding, the telescopic device is adapted to drive the forming device to move vertically upward, thereby causing the forming device to drive the handle to separate from the lower mold and the gate.

[0006] Preferably, the telescopic device is a hydraulic cylinder, with a top plate installed at one end of the piston rod of the hydraulic cylinder, the molding device installed on the top plate, and an installation groove adapted to the top plate provided in the lower mold; during demolding, the hydraulic cylinder is adapted to extend to drive the top plate to move up and disengage from the installation groove, thereby causing the molding device to drive the handle to separate from the lower mold and the gate.

[0007] Preferably, the molding device includes a pair of molding components, a transmission component, and a driving device. The molding components are disposed on the top plate and used to mold the arc-shaped groove. The driving device is mounted on the top plate. The input end of the transmission component is connected to the output end of the driving device, and the output end of the transmission component is connected to the molding component. During demolding, the driving device is adapted to drive the molding component to slide arc-shaped along the arc-shaped groove through the transmission component, thereby synchronously disengaging the molding component from the corresponding handle.

[0008] Preferably, the top plate is provided with a pair of arc-shaped guide grooves, the molding component slides in cooperation with the guide grooves, the transmission component includes a traction plate and a pair of traction rods, the traction plate is connected to the driving device, one end of the traction rod is hinged to the traction plate, and the other end of the traction rod is hinged to the molding component; during demolding, the driving device is adapted to drive the traction plate to translate, thereby cooperating with the traction rods to drive the molding component to slide arc-shaped along the guide grooves until it disengages from the arc-shaped groove opening.

[0009] Preferably, the driving device is a hydraulic cylinder, which is mounted on the traction plate and the piston end of the hydraulic cylinder is connected to the top plate; during demolding, the hydraulic cylinder is adapted to extend and drive the traction plate to translate.

[0010] Preferably, a positioning component is provided between the upper mold and the molding component; during mold closing, the upper mold is adapted to limit the molding component by means of the positioning component, so that the molding component is locked at the corresponding molding position.

[0011] Preferably, the positioning component includes a positioning rod and a positioning groove. The positioning rod is installed on the upper mold, and the positioning groove is disposed on the molding component. During mold closing, the positioning rod and the positioning groove are inserted and engaged.

[0012] Preferably, the positioning component further includes a positioning hole, which is disposed in the lower mold and adapted to the positioning rod; during mold closing, the positioning rod is adapted to pass through the positioning groove and extend to the positioning hole.

[0013] Preferably, the molding assembly includes a core block and a slider connected to each other. The core block is used to form the arc-shaped groove, and the slider is slidably engaged with the guide groove. During mold closing, the slider coincides with the axis of the traction rod.

[0014] Preferably, the molding component has a cooling pipe inside, and the two ends of the cooling pipe are respectively provided with a water inlet pipe and a water outlet pipe corresponding to the bottom end of the molding component. Multiple arc-shaped limiting grooves are provided through the top plate, and the water inlet pipe and the water outlet pipe pass through the limiting grooves. When demolding the arc-shaped groove, the water inlet pipe and the water outlet pipe slide arc-shaped along the limiting groove.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] This invention incorporates a telescopic device that, in conjunction with the molding device, enables the product to be ejected and demolded. This eliminates the need for a conventional ejector pin mechanism in the mold body, thus avoiding the impact of ejectors on the mold cavity and reducing the complexity of the lower mold's internal structure. This provides better installation design space for other components, thereby improving the mold's service life and reliability, while reducing maintenance costs and operational complexity, making mold maintenance and operation more convenient. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the existing product structure.

[0018] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the upper mold after it is opened according to the present invention.

[0020] Figure 4 For the present utility model Figure 3 A magnified structural diagram at point E.

[0021] Figure 5 This is a schematic diagram illustrating the working principle of the handle product of this utility model when it is detached from the lower mold.

[0022] Figure 6 This is a three-dimensional structural diagram of the handle product of this utility model when it is detached from the lower mold.

[0023] Figure 7 This is a schematic diagram illustrating the working principle of the molding component of this utility model when it detaches from the arc-shaped groove.

[0024] Figure 8 This is a schematic diagram of the bottom structure of the top plate of this utility model.

[0025] Figure 9 This is a schematic diagram of the cooling system of the molding component of this utility model.

[0026] Figure 10 This is a schematic diagram of the positioning component structure of this utility model.

[0027] In the diagram: 1. Handle; 101. Arc-shaped groove; 2. Upper mold; 3. Lower mold; 4. Drive device; 5. Transmission assembly; 501. Traction plate; 502. Traction rod; 6. Telescopic device; 7. Top plate; 8. Molding assembly; 801. Core block; 802. Slider; 9. Guide groove; 10. Gate; 11. Limiting groove; 12. Water inlet pipe; 13. Water outlet pipe; 14. Cooling pipe; 15. Positioning assembly; 1501. Positioning rod; 1502. Positioning groove; 1503. Positioning hole. Detailed Implementation

[0028] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0030] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0031] One preferred embodiment of this application, such as Figures 1 to 10 As shown, an ejection device for a mold includes an upper mold 2, a lower mold 3, a forming device, and a telescopic device 6. The upper mold 2, the lower mold 3, and the forming device cooperate to form a cavity for a handle 1 required for forming. The forming device is used to form the arc-shaped groove 101 of the handle 1. The telescopic device 6 is vertically installed in the lower mold 3, and the forming device is horizontally set and connected to the output end of the telescopic device 6.

[0032] Understandably, during demolding, the telescopic device 6 extends, thereby causing the molding device to move vertically upward, which in turn causes the molding device to separate the handle 1 from the lower mold 3 and the gate 10.

[0033] like Figure 4As shown, the molded handle 1 is connected to the gate 10 of the mold body (i.e., the upper mold 2 and the lower mold 3). Specifically, it is connected to the molten plastic that has cooled and solidified inside the gate 10. Therefore, as the handle 1 moves upward to demold, it also separates from the gate 10, thus automatically separating the ejected product from the gate 10 without the need for subsequent trimming. We can consider the molten plastic that has cooled and solidified inside the gate 10 as a cylinder. The end of the cylinder is connected to the product, and its connection range is small. The lower half of the cylinder is still adhered to the lower mold 3, and its connection range is large. Therefore, the connection force between the cylinder and the lower mold 3 is greater than the connection force between the cylinder and the product, thus automatically separating from the gate 10 when the product moves upward.

[0034] Specifically, the telescopic device 6 can be a hydraulic cylinder, with a top plate 7 installed at one end of the piston rod of the hydraulic cylinder, the forming device installed on the top plate 7, and an installation groove adapted to the top plate 7 provided in the lower mold 3.

[0035] It is understandable that, such as Figure 2 As shown, before demolding, the top plate 7 is located in the mounting groove, and the tops of the top plate 7 and the lower mold 3 are flush (to improve aesthetics and layout rationality). During demolding, the hydraulic cylinder is adapted to extend to drive the top plate 7 to move upward and detach from the mounting groove, thereby causing the molding device to drive the handle 1 to separate from the lower mold 3 and the gate 10, realizing the demolding process of the handle 1.

[0036] Therefore, the above design eliminates the need for a conventional ejector mechanism in the mold body, thus avoiding the impact of ejectors on the mold cavity and preventing the internal structure of the lower mold 3 from becoming too complex. This allows for better installation design space for other components (such as cooling water pipes), thereby improving the service life and reliability of the mold, while reducing the maintenance cost and operational complexity of the mold, making mold maintenance and operation more convenient.

[0037] It should be noted that for this demolding method, the arc-shaped groove 101 must be large enough, meaning that the corresponding molding device must have sufficient supporting force to achieve the demolding process of the handle 1, preventing deformation or damage during demolding. Of course, the arc-shaped groove 101 here does not necessarily refer to a groove with an arc shape; any suitable groove can be used.

[0038] In this embodiment, as Figure 3As shown, the molding device includes multiple molding components 8, a transmission component 5, and a drive device 4. The molding components 8 are disposed on the top plate 7 and are used to mold the arc-shaped slots 101 of multiple handles 1. The drive device 4 is mounted on the top plate 7. The input end of the transmission component 5 is connected to the output end of the drive device 4, and the output end of the transmission component 5 is connected to the molding component 8. That is to say, multiple handle 1 products can be molded in one mold.

[0039] It is understandable that there are multiple cavities within the mold body (i.e., upper mold 2 and lower mold 3), which allows multiple handles 1 to be formed at once. During demolding, the drive device 4 is activated, which acts on the transmission component 5. Under the action of the transmission component 5, multiple forming components 8 can be driven to slide in an arc along the arc-shaped groove 101 of the handle 1, thereby enabling the multiple forming components 8 to slide synchronously and demold from the corresponding handle 1.

[0040] Therefore, this application uses only one drive source (i.e., drive device 4), and under the action of the transmission component 5, the synchronous demolding process of multiple handle 1 products can be realized, thereby significantly reducing costs, reducing the complexity of the control system and simplifying the mold structure. This design not only improves production efficiency but also ensures product quality.

[0041] At this point, the handle 1 can be demolded in the following manner: after the upper mold 2 opens and before the arc-shaped groove 101 is demolded (i.e., the molding component 8 is still located within the arc-shaped groove 101), such as... Figure 5 As shown in (A). When the telescopic device 6 is activated, it extends and drives the top plate 7 to move vertically upwards. Naturally, the molding component 8 moves upwards synchronously with the top plate 7, thereby driving the handle 1 to move upwards to achieve the demolding process, as shown in (A). Figure 5 As shown in (B); finally, the arc-shaped groove 101 is demolded through the cooperation of the drive device 4 and the transmission component 5, thereby achieving the separation process between the entire handle 1 product and the entire mold body.

[0042] In one embodiment of this application, such as Figure 3 As shown, multiple arc-shaped guide grooves 9 are provided on the top plate 7. The forming component 8 slides with the guide grooves 9. The transmission component 5 includes a traction plate 501 and multiple traction rods 502. The traction plate 501 is connected to the driving device 4. One end of the traction rod 502 is hinged to the traction plate 501, and the other end of the traction rod 502 is hinged to the forming component 8.

[0043] Understandably, during demolding, the drive device 4 can drive the traction plate 501 to move horizontally away from the handle 1. The traction plate 501 acts on the traction rod 502, which can pull the molding component 8 to slide in an arc along the guide groove 9, thereby realizing the separation process between the traction rod 502 and the arc groove 101.

[0044] For example: Figure 7 As shown in (C), this is the initial state. We can assume that there is a pair of handles 1 products in a mold (the following embodiments will also be described as a pair), then there is also a pair of corresponding traction rods 502, and the products can be arranged symmetrically. During demolding, as... Figure 7 As shown in (D), the drive device 4 will drive the traction plate 501 to move to the right, and the traction plate 501 will act on the two traction rods 502 to rotate, thereby pulling the two molding components 8 to slide in an arc to achieve the demolding process. Of course, as long as the length of the mold is long enough, there can be more or more pairs of handles 1 inside it, that is, the number of products in a mold can be at least two.

[0045] It should be noted that the specific structure and working principle of the aforementioned drive device 4 and telescopic device 6 are well-known technologies to those skilled in the art, and therefore will not be described in detail here. Common types include hydraulic cylinders, pneumatic cylinders, and linear motors. Those skilled in the art can choose according to actual needs. Generally, both can be chosen to use hydraulic cylinders.

[0046] Furthermore, in the mold-making field, the drive unit 4 is preferably a hydraulic cylinder. For example... Figure 7 As shown in (C), we know that in the initial state, the traction plate 501 is located close to the top plate 7. If the cylinder body of the hydraulic cylinder is installed on the top plate 7, it will occupy a large portion of the usable area of ​​the top plate 7, which may also affect the setting of the guide groove 9. Therefore, the drive device 4 can be installed in the following way: Figure 3 As shown, the cylinder body of the hydraulic cylinder can be fixedly installed on the right side of the traction plate 501, and the piston end of the hydraulic cylinder passes through the traction plate 501 and is connected to the top plate 7.

[0047] It is understandable that, such as Figure 7 As shown in (C), the hydraulic cylinder is initially in a retracted state, at which point the cylinder body is far from the top plate 7, thus not affecting the installation space on the top plate 7. During demolding, the hydraulic cylinder can extend, allowing the traction plate 501 to move to the right under the action of the hydraulic cylinder body, thereby driving the demolding process of the molding component 8.

[0048] On the other hand, it should be understood that the force exerted by the molding component 8 during demolding is definitely greater than the force exerted during mold closing, because there will be an adhesive force between the molding component 8 and the handle 1 product during demolding. In a typical hydraulic cylinder, the thrust is much greater than the pull. Therefore, by extending the hydraulic cylinder to achieve the demolding process, the adhesive force can be overcome more effectively, ensuring that the molding component 8 can smoothly remove the handle 1 product from the mold.

[0049] In one embodiment of this application, such as Figure 10 As shown, in order to further improve the positioning effect of the molding component 8, a positioning component 15 can be provided between the upper mold 2 and the molding component 8. It can be understood that during mold closing, the upper mold 2 can limit the molding component 8 through the positioning component 15, so that the molding component 8 is locked at the corresponding molding position. This ensures that the molding component 8 will not shift position during the mold closing process, thereby improving the molding quality of the subsequent handle 1 product.

[0050] Specifically, this application does not specifically limit the structure of the positioning component 15. The following provides a specific embodiment for illustration: Figure 10 As shown, the positioning component 15 includes a positioning rod 1501 and a positioning groove 1502. The positioning rod 1501 is fixedly installed on the upper mold 2, and the positioning groove 1502 is disposed on the molding component 8. It can be understood that during mold closing, the positioning rod 1501 and the positioning groove 1502 are inserted and engaged, and the traction rod 502 can also limit the molding component 8, thereby achieving double limiting and locking of the molding component 8, which greatly improves the limiting effect.

[0051] It should be noted that the top end of the positioning rod 1501 is fixed to the upper mold 2, while the bottom end of the positioning rod 1501 is not limited. Therefore, in order to further improve the limiting effect, such as Figure 10 As shown, the positioning component 15 also includes a positioning hole 1503, which is disposed within the lower mold 3 and adapted to the positioning rod 1501. It can be understood that during mold closing, the positioning rod 1501 can pass through the positioning groove 1502 and extend into the positioning hole 1503, thereby achieving an insertion fit with the positioning hole 1503. In this way, both the top and bottom ends of the positioning rod 1501 can be limited, ensuring that the molding component 8 remains stable throughout the mold closing process and avoiding molding defects caused by inaccurate positioning.

[0052] Furthermore, if the positioning rod 1501 and the positioning groove 1502 are perfectly matched in size, then if there is a slight offset between the positioning rod 1501 and the positioning groove 1502 when the positioning rod 1501 is initially inserted, the positioning rod 1501 will not be able to be inserted into the positioning groove 1502, and in severe cases, it may even cause the positioning rod 1501 to be deformed by hard compression.

[0053] Therefore, in order to solve the above-mentioned technical problems, one embodiment of this application is as follows: Figure 10 As shown, the lower end of the positioning rod 1501 has a wedge-shaped structure, and the bottom end of the positioning rod 1501 is provided with a chamfer structure, so that the lower end of the positioning rod 1501 forms a clearance fit with the positioning groove 1502 and the positioning hole 1503.

[0054] It is understandable that, such as Figure 10 or Figure 7 As shown, when the molding component 8 moves to its limit position to the left along the guide groove 9 on the top plate 7, this is the position of the molding component 8 during molding or its initial position before demolding. Therefore, when the molding component 8 is misaligned, it will only shift to the right. Thus, the wedge-shaped surface can be positioned to the left of the positioning rod 1501 (corresponding to the position of the molding component 8). When the positioning rod 1501 is inserted downwards, it can smoothly insert into the positioning groove 1502 with the help of the chamfered structure. Of course, when the molding component 8 is not misaligned, the positioning rod 1501 will move downwards without obstruction. When the molding component 8 shifts, the wedge-shaped surface on the positioning rod 1501 will exert a squeezing and guiding effect on the molding component 8, causing it to correct itself towards its initial position until the positioning rod 1501 is inserted into the positioning hole 1503, thereby locking the molding component 8.

[0055] In one embodiment of this application, such as Figure 7 As shown, the molding assembly 8 includes a core block 801 and a slider 802 connected to each other. The core block 801 is used to mold the arc-shaped groove 101, and the slider 802 is slidably engaged with the guide groove 9. The slider 802 and the traction rod 502 satisfy the following relationship: Figure 7 As shown in (C), during mold closing, the axis of slider 802 coincides with that of traction rod 502.

[0056] It is understandable that at this time, the axes of slider 802 and traction rod 502 are located on the same straight line, and this straight line can be considered to be tangent to the curve in which slider 802 moves. In other words, the initial direction of slider 802 can be regarded as the direction of the straight line. Therefore, traction rod 502 can play a limiting and locking role on slider 802 to the greatest extent, thereby improving the limiting effect on traction rod 502.

[0057] In one embodiment of this application, such as Figure 8 and Figure 9 As shown, the cooling system of the molding component 8 is as follows: a cooling pipe 14 is provided inside the molding component 8. Water inlet pipe 12 and water outlet pipe 13 are respectively provided at both ends of the cooling pipe 14 corresponding to the bottom end of the molding component 8. Multiple arc-shaped limiting grooves 11 are provided through the top plate 7. Water inlet pipe 12 and water outlet pipe 13 both pass through the limiting grooves 11.

[0058] Understandably, the inlet pipe 12 is connected to the coolant pumping equipment, and the outlet pipe 13 is connected to the discharge system. Coolant is then fed in through the bottom inlet pipe 12, cools the molding component 8 through the cooling pipe 14, and finally discharges through the outlet pipe 13. During the subsequent demolding of the arc-shaped groove 101, the molding component 8 will slide in an arc shape, such as... Figure 8 As shown, the inlet pipe 12 and outlet pipe 13 can slide in an arc along the limiting groove 11. The pipes connected to the inlet pipe 12 and outlet pipe 13 can be flexible or movable, thus preventing interference with their sliding. Therefore, the limiting groove 11 effectively provides bottom cooling for the molding component 8, allowing the arc-shaped groove 101 to cool and solidify quickly. It also ensures a reasonable and orderly pipe arrangement, reducing the complexity of the cooling system layout and potential leakage risks. Furthermore, the layout design of the cooling pipes 14 ensures uniform distribution of coolant within the molding component 8, achieving efficient cooling of the entire molding component 8.

[0059] The working principle of this utility model is as follows:

[0060] Demolding method 1: such as Figure 3 As shown, after the upper mold 2 opens, the handle 1 product needs to be demolded. (As indicated...) Figure 5 As shown in (A), firstly, the telescopic device 6 is activated, causing it to extend and lift the top plate 7 upwards. Therefore, the handle 1 product can detach from the lower mold 3 under the action of the core puller (i.e., molding component 8). Figure 5 (B) or Figure 6 As shown. The product after detaching from the lower mold 3 is as follows: Figure 7 As shown in (C), the drive device 4 extends when activated, thereby causing the traction plate 501 to move to the right. The traction plate 501 then acts on the two traction rods 502 to rotate, which in turn pulls the two molding components 8 to slide in an arc. At this time, the product will be pressed against the left side of the top plate 7. Therefore, the sliding of the molding components 8 can realize the demolding process. Figure 7 As shown in (D) in the diagram.

[0061] Demolding Method Two: This is essentially the reverse of Demolding Method One. First, the drive device 4 extends, separating the molding component 8 from the arc-shaped groove 101. Then, the drive device 4 retracts, returning the molding component 8 to the arc-shaped groove 101. At this point, there is no adhesion between the molding component 8 and the other component. Next, the telescopic device 6 extends, driving the top plate 7 to move vertically upwards. The molding component 8 moves upwards synchronously with the top plate 7, thus driving the handle 1 upwards to achieve the demolding process. Although the drive device 4 is activated multiple times during this process, after the product is ejected from the lower mold 3, it has already completed the separation process from the arc-shaped groove 101. This prevents the product from pressing against the top plate 7 to achieve demolding, thus preventing product deformation due to compression and ensuring product quality.

[0062] It should be noted that demolding method one is simpler and primarily targets products with high strength and resistance to extrusion deformation, ensuring they will not deform even under appropriate extrusion pressure. Demolding method two is slightly more complex, but it guarantees product stability and quality.

[0063] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. An ejection device for a mold, characterized in that, include: The upper mold, lower mold, forming device, and telescopic device are provided. The upper mold, lower mold, and forming device cooperate with each other to form a cavity for forming a handle. The forming device is used to form an arc-shaped groove for the handle. The telescopic device is vertically installed in the lower mold and horizontally set and connected to the output end of the telescopic device. During demolding, the telescopic device is adapted to drive the molding device to move vertically upward, thereby causing the molding device to separate the handle from the lower mold and the gate.

2. The ejection device for a mold as described in claim 1, characterized in that: The telescopic device is a hydraulic cylinder, and a top plate is installed at one end of the piston rod of the hydraulic cylinder. The molding device is installed on the top plate, and an installation groove adapted to the top plate is provided in the lower mold. When demolding, the hydraulic cylinder is adapted to extend to drive the top plate to move up and disengage from the installation groove, thereby causing the molding device to drive the handle to separate from the lower mold and the gate.

3. The ejection device for a mold as described in claim 2, characterized in that: The molding device includes a pair of molding components, a transmission component, and a driving device. The molding components are disposed on the top plate and are used to mold the arc-shaped groove. The driving device is mounted on the top plate. The input end of the transmission component is connected to the output end of the driving device, and the output end of the transmission component is connected to the molding component. During demolding, the driving device is adapted to drive the molding component to slide along the arc-shaped groove through the transmission component, thereby synchronously disengaging the molding component from the corresponding handle.

4. The ejection device for a mold as described in claim 3, characterized in that: The top plate is provided with a pair of arc-shaped guide grooves, the molding component slides with the guide grooves, the transmission component includes a traction plate and a pair of traction rods, the traction plate is connected to the driving device, one end of the traction rod is hinged to the traction plate, and the other end of the traction rod is hinged to the molding component; During demolding, the driving device is adapted to drive the traction plate to translate, and then cooperate with the traction rod to drive the molding component to slide in an arc along the guide groove until it disengages from the arc groove opening.

5. The ejection device for a mold as described in claim 4, characterized in that: The driving device is a hydraulic cylinder, which is mounted on the traction plate and the piston end of the hydraulic cylinder is connected to the top plate. During demolding, the hydraulic cylinder is adapted to extend and drive the traction plate to translate.

6. The ejection device for a mold as described in claim 3, characterized in that: A positioning component is provided between the upper mold and the molding component; when the mold is closed, the upper mold is adapted to limit the molding component by means of the positioning component, so that the molding component is locked at the corresponding molding position.

7. The ejection device for a mold as described in claim 6, characterized in that: The positioning component includes a positioning rod and a positioning groove. The positioning rod is installed on the upper mold, and the positioning groove is disposed on the molding component. During mold closing, the positioning rod and the positioning groove are inserted and engaged.

8. The ejection device for a mold as described in claim 7, characterized in that: The positioning component further includes a positioning hole, which is disposed in the lower mold and adapted to the positioning rod; during mold closing, the positioning rod is adapted to pass through the positioning groove and extend to the positioning hole.

9. The ejection device for a mold as described in claim 4, characterized in that: The molding assembly includes a core block and a slider connected to each other. The core block is used to form the arc-shaped groove, and the slider is slidably engaged with the guide groove. When the mold is closed, the slider coincides with the axis of the traction rod.

10. The ejection device for a mold as described in claim 3, characterized in that: The molding component has a cooling pipe inside, and the two ends of the cooling pipe are respectively provided with a water inlet pipe and a water outlet pipe corresponding to the bottom end of the molding component. Multiple arc-shaped limiting grooves are provided through the top plate, and the water inlet pipe and the water outlet pipe pass through the limiting grooves. When demolding the arc-shaped groove, the water inlet pipe and the water outlet pipe slide arc-shaped along the limiting groove.

Images