Two-stage demolding mold
The elastic transverse movement of the thimble plate and the male template is driven by the elastic transverse movement device, and the low cost and convenient installation of the secondary mold release mold is achieved.
Patent Information
- Application Number
- CN202421623803.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-07-09
AI Technical Summary
The existing secondary mold release mold requires two sets of drive devices to drive the male template and the thimble plate respectively, which is costly and inconvenient to install.
A set of driving devices is used to drive the relative movement of the thimble plate and the male template through an elastic transverse movement device, achieving two-stage mold release of the workpiece, reducing the number of driving devices.
Reduces the cost of the mold and simplifies the installation process of the drive device.
Smart Images
Figure CN223071766U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of die equipment, in particular to a secondary demoulding die. Background Art
[0002] A die usually consists of a fixed die and a moving die. The fixed die is the front die, usually fixed, and the moving die is the rear die, which can move back and forth relative to the fixed die. The fixed die includes a fixed panel and a female template (i.e., A plate) installed behind the fixed panel. Among them, a glue inlet / gating system is provided on the front end face of the fixed panel, and a cavity is formed by a partial forward depression on the rear end face of the female template. A runner is provided between the glue inlet / gating system and the cavity for connection. The moving die includes a male template (i.e., B plate), and a die core is installed on the front end face of the male template facing the female template. When the moving die moves forward to close the die with the fixed die, the front part of the die core of the male template extends into the cavity of the female template, and finally the die core and the cavity jointly enclose a space in the shape of the workpiece to be molded. The raw material enters from the glue inlet / gating system of the fixed panel, flows into the cavity of the female template through the runner, fills the space enclosed by the die core and the cavity, and forms the workpiece to be molded after cooling and solidification.
[0003] After the workpiece is formed, it will wrap around the outside of the die core of the male template. When the moving die moves backward, the die core together with the workpiece moves away from the fixed die. The moving die also includes an ejector plate located behind the male template, and a plurality of ejector pins extending towards the male template are installed on the ejector plate. These ejector pins pass through the male template and extend into the male template. After the moving die moves backward a certain distance and stops moving, the ejector plate drives the ejector pins on it to move forward relative to the male template, so that the ejector pins protrude forward to the front of the male template, thereby pushing the workpiece wrapped around the die core forward to leave the die core. The workpiece thus completes demoulding and falls below the moving die (or is manually taken away by production personnel, or picked up by a manipulator) to complete discharging. Due to factors such as the structure and shape of some workpieces, they cannot be directly pushed out by the ejector pins at one time. Therefore, a spacer plate needs to be provided behind the male template, the die core is changed to be installed on the spacer plate, passes through the male template forward, and extends to the front of the male template. The male template is changed to be able to move back and forth relative to the spacer plate and the die core. When the workpiece needs to be demoulded, first let the male template move forward a small distance relative to the die core to push the workpiece wrapped around the outside of the die core for the first-stage demoulding, and then the ejector pins push the preliminarily demoulded workpiece forward for the second-stage demoulding. This secondary demoulding die that pushes the workpiece to demould in two steps does not install a driving device itself. In order to enable the male template and the ejector plate to complete the above movements in sequence to push out the workpiece, after the die is installed in place, two sets of driving devices need to be additionally configured outside the die to drive the male template and the ejector plate respectively, which has a high cost and the operation of installing the driving device is relatively inconvenient. Summary of the Utility Model
[0004] The technical problem to be solved by the present utility model is to provide a two-stage demolding mold, in which the male template and the ejector plate can realize the demolding operation of pushing the workpiece forward and backward only by means of a set of driving devices, without separately arranging driving devices for the male template and the ejector plate, with relatively low cost and convenient operation of installing the driving devices.
[0005] To solve the above problems, the present utility model provides a two-stage demolding mold:
[0006] It includes a front fixed mold and a rear moving mold;
[0007] The moving mold includes a front male template and a rear spacer. The male template can move longitudinally forward and backward relative to the spacer. A mold core extending forward is fixedly installed on the spacer. The mold core passes forward through the male template and extends to the front of the male template to receive the wrapped formed workpiece.
[0008] An ejector plate capable of moving longitudinally forward and backward relative to the male template is provided behind the spacer. Ejector pins are installed on the ejector plate. The ejector pins pass forward through the spacer and extend into the male template, and can be extended to the front of the male template under the drive of the ejector plate.
[0009] An elastic transverse movement device capable of moving transversely relative to the ejector plate is installed in the ejector plate, and first through holes and second through holes spaced from each other are formed therein;
[0010] A first guide post extending toward the ejector plate is installed on the spacer. The first guide post has a tapered bottom extending into the first through hole of the elastic transverse movement device, and the first guide post is not aligned with the first through hole;
[0011] A second guide post is installed on the male template. It is located beside the first guide post, passes backward through the spacer, and the bottom surface abuts against the front end surface of the elastic transverse movement device;
[0012] When the ejector plate is driven, it drives the ejector pins and the elastic transverse movement device installed thereon to move forward together. The elastic transverse movement device pushes the second guide post, thereby driving the male template to move forward relative to the spacer and the mold core installed on the spacer. The male template pushes the workpiece wrapped outside the mold core for the first-stage demolding; as the elastic transverse movement device moves forward, the tapered bottom of the first guide post gradually extends backward into the first through hole and drives the elastic transverse movement device to move transversely relative to the ejector plate against its own elastic force until the second through hole of the elastic transverse movement device is aligned with the second guide post. The second guide post can extend into the second through hole and is no longer pushed by the elastic transverse movement device, and the male template is no longer driven to move forward. At this time, the ejector pins are still driven by the ejector plate and move forward relative to the male template to extend to the front of the male template, pushing the workpiece that has completed the first-stage demolding for the second-stage demolding.
[0013] Further, specifically, the elastic lateral movement device moves laterally relative to the ejector pin plate against its own elastic force until when its second through hole aligns with the second guide post, its first through hole exactly aligns with the first guide post.
[0014] Further: The elastic lateral movement device includes a lateral movement block, and the first through hole and the second through hole are specifically provided on the lateral movement block; a spring is provided beside the lateral movement block. When the tapered bottom of the first guide post continuously extends backward into the first through hole, it drives the lateral movement block to move laterally relative to the ejector pin plate against the elastic force of the spring. When the first guide post moves forward away from the first through hole, the lateral movement block resets under the action of the elastic force of the spring until the second through hole is not aligned with the second guide post.
[0015] Further: The ejector pin plate includes a front ejector pin panel and a rear ejector pin base plate. The ejector pin panel and the ejector pin base plate are detachably connected together to jointly fix the ejector pins; the elastic lateral movement device is specifically provided between the ejector pin panel and the ejector pin base plate.
[0016] Further, a lateral accommodation groove is formed on the front end face of the ejector pin base plate. The lateral movement block and the spring of the elastic lateral movement device are both accommodated in this accommodation groove. The spring is horizontally arranged, with one end connected to the lateral movement block and the other end connected to the side wall of the accommodation groove.
[0017] Further: There are two elastic lateral movement devices, which are centrosymmetric about the longitudinal axis center of the ejector pin plate; there are correspondingly two first guide posts, which are centrosymmetric about the longitudinal axis center of the ejector pin plate; there are correspondingly two second guide posts, which are centrosymmetric about the longitudinal axis center of the ejector pin plate.
[0018] Beneficial effects: By providing a driving device for the ejector pin plate, the male template and the ejector pins can be driven to perform demolding operations successively by driving the ejector pin plate, without the need to separately provide a driving device for the male template as in the background art, which has lower costs and more convenient operation of installing the driving device. Description of the Drawings
[0019] Figure 1 is a schematic structural diagram of the moving mold of a secondary demolding mold.
[0020] Figure 2 is a top view schematic diagram of the moving mold of a secondary demolding mold.
[0021] Figure 3 is along Figure 2 the cross-sectional schematic diagram in the A - A direction in
[0022] Figure 4 is along Figure 2 the cross-sectional schematic diagram in the B - B direction in
[0023] Figure 5 is along Figure 2 the cross-sectional schematic diagram in the C - C direction in
[0024] Figure 6 is Figure 4 An enlarged view of part D in
[0025] Figure 7 is a schematic structural diagram of the ejector plate, ejector pins, return guide posts, first guide post, and second guide post.
[0026] Figure 8 is Figure 7 A partial exploded schematic diagram of
[0027] Symbol description:
[0028] 1 - moving die; 11 - spacer block; 2 - male template; 21 - second guide post; 3 - spacer plate; 31 - first core; 32 - positioning guide post; 33 - first guide post; 331 - conical bottom; 4 - ejector plate; 41 - ejector pin panel; 42 - ejector pin bottom plate; 421 - receiving groove; 43 - return guide post; 44 - ejector pin; 451 - first avoidance through hole; 452 - second avoidance through hole; 5 - elastic lateral movement device; 51 - lateral movement block; 511 - first through hole; 512 - second through hole; 52 - spring. Specific embodiments
[0029] The following further elaborates on the present invention in detail in conjunction with specific embodiments.
[0030] The two - stage demolding mold includes a front - located fixed mold and a rear - located moving mold, where: The fixed mold includes a front panel and a female template installed behind the front panel, and a mold cavity is formed on the rear end face of the female template; The moving mold includes a male template and a core extending in front of the male template. In the closed - mold state of the fixed mold and the moving mold, the core can extend into the mold cavity and jointly enclose a space in the shape of the workpiece to be molded. When molding the workpiece, first install the mold on equipment such as a casting machine, and then the casting machine injects and fills the raw material into this space. After the raw material in the space cools and forms, the workpiece to be molded is formed, and the formed workpiece wraps around the outside of the core of the male template. The fixed mold, front panel, female template, and mold cavity are prior art, and their specific structures and working principles are not elaborated here. The specific structure of the moving mold is described below.
[0031] See Figure 1 , the moving mold 1 is successively provided with a male template 2, a spacer plate 3, and two spacer blocks 11 from front to back. A first core 31 that protrudes forward is fixedly installed on the spacer plate 3. See Figure 3 , the first core 31 passes through the male template 2 forward and extends in front of the male template 2. See Figure 1, four positioning guide posts 32 protrude forward from the four corners of the spacer 3 respectively. The four positioning guide posts 32 pass through the male template 2, and the male template 2 can move along the four positioning guide posts 32, so as to move longitudinally back and forth relative to the spacer 3 and the first die core 31 installed on the spacer 3. A ejector plate 4 is provided between the two cushion blocks 11. The ejector plate 4 is composed of a front ejector plate panel 41 and a rear ejector plate bottom plate 42 which are detachably bolted together. Four reset guide posts 43 (combined with Figure 7 ) protrude forward from the four corners of the ejector plate panel 41. The four reset guide posts 43 protrude forward, and sequentially pass through and are accommodated in the spacer 3 and the male template 2. The ejector plate 4 is guided by the four reset guide posts 43 and can move longitudinally back and forth relative to the spacer 3 and the male template 2. See Figure 5 . A plurality of ejector pins 44 are penetrated through the ejector plate panel 41. The tops of these ejector pins 44 protrude forward through the spacer 3 and extend into the male template 2. The bottom of the ejector pin 44 is a boss protruding radially outward, and is jointly fixed by the connected ejector plate panel 41 and ejector plate bottom plate 42, so that it can move longitudinally back and forth relative to the spacer 3 and the male template 2 together with the ejector plate panel 41 and the ejector plate bottom plate 42.
[0032] See Figure 8 . A first avoidance through hole 451 and a second avoidance through hole 452 are opened on both sides of the ejector plate panel 41. The first avoidance through hole 451 and the second avoidance through hole 452 on the same side are arranged at intervals. The two first avoidance through holes 451 are centrosymmetric about the central axis of the ejector plate panel 41 in the longitudinal direction back and forth, and the two second avoidance through holes 452 are also centrosymmetric about the central axis of the ejector plate panel 41 in the longitudinal direction back and forth. See Figure 6 . Two first avoidance through holes 451 and two second avoidance through holes 452 are also opened on both sides of the ejector plate bottom plate 42. The first avoidance through holes 451 and the second avoidance through holes 452 of the ejector plate bottom plate 42 are aligned with those of the ejector plate panel 41 one by one. See Figure 6 and Figure 8 . A receiving groove 421 is opened on each side of the front end face of the ejector plate bottom plate 42. The two receiving grooves 421 are centrosymmetric about the central axis of the ejector plate bottom plate 42 in the longitudinal direction back and forth (the central axis of the ejector plate bottom plate 42 in the longitudinal direction back and forth is collinear with the ejector plate panel 41), and are both arranged horizontally left and right; the first avoidance through holes 451 and the second avoidance through holes 452 on the same side of the ejector plate bottom plate 42 communicate with the bottom of the receiving groove 421 on the same side respectively. An elastic lateral movement device 5 is installed in each receiving groove 421 (see Figure 8 ). The two elastic lateral movement devices 5 are also centrosymmetric about the central axis of the ejector plate bottom plate 42 in the longitudinal direction back and forth. Taking one of the elastic lateral movement devices 5 as an example, see Figure 8, the elastic lateral shifting device 5 includes a lateral shifting block 51 and a spring 52 accommodated in the accommodation groove 421. Among them, the spring 52 is horizontally placed between the lateral shifting block 51 and the left side wall of the accommodation groove 421. The left end of the spring 52 is connected to the left side wall of the accommodation groove 421, and the right end is connected to the lateral shifting block 51. On the front end face of the lateral shifting block 51, a first through hole 511 and a second through hole 512 are provided. The first through hole 511 and the second through hole 512 are arranged at intervals. In the natural state of the spring 52, see Figure 6 , the first through hole 511 of the lateral shifting block 51 is not aligned with the first avoidance through hole 451 of the ejector pin base plate 42, and the second through hole 512 of the lateral shifting block 51 is not aligned with the second avoidance through hole 452 of the ejector pin base plate 42.
[0033] See Figure 6 , on the spacer plate 3, two first guide posts 33 extending backward are installed (in combination with Figure 8 ), the two first guide posts 33 are centrosymmetric about the front-rear longitudinal axis of the spacer plate 3 (the front-rear longitudinal axis of the spacer plate 3 is collinear with the ejector pin panel 41), and are respectively aligned with the two first avoidance through holes 451 of the ejector pin panel 41. The first guide post 33 has a tapered bottom 331, and its tapered bottom 331 passes through the aligned first avoidance through hole 451 of the ejector pin panel 41 and extends into the first through hole 511 of the lateral shifting block 51. At this time, the first guide post 33 is not aligned with the first through hole 511 of the lateral shifting block 51. See Figure 4 , on the male mold plate 2, two second guide posts 21 are installed (in combination with Figure 8 ), the two second guide posts 21 are centrosymmetric about the front-rear longitudinal axis of the male mold plate 2 (the front-rear longitudinal axis of the male mold plate 2 is collinear with the ejector pin panel 41), and the two second guide posts 21 respectively pass through the spacer plate 3 backward and are respectively aligned with the two second avoidance through holes 452 of the ejector pin panel 41 (see Figure 6 ). After the second guide post 21 passes through the aligned second avoidance through hole 452 of the ejector pin panel 41, the bottom surface abuts against the front end face of the lateral shifting block 51. At this time, the second guide post 21 is not aligned with the second through hole 512 of the lateral shifting block 51.
[0034] When it is necessary to perform secondary demolding on the workpiece wrapped around the first core 31 (see Figure 2 ), the ejector pin base plate 42 is pushed forward by a driving device (not shown in the figure) on the casting machine, see Figure 6 and Figure 8, when the ejector base plate 42 is pushed, it drives the ejector panel 41, the elastic lateral displacement device 5, the ejector pin 44 and the reset guide post 43 mounted thereon to move forward together. Since the bottom surface of the second guide post 21 of the male template 2 abuts against the front end surface of the lateral displacement block 51 of the elastic lateral displacement device 5, when the elastic lateral displacement device 5 moves forward, it drives the male template 2 through the second guide post 21, causing the male template 2 to move forward relative to the spacer plate 3 and the first core 31 mounted on the spacer plate 3, so that the male template 2 pushes the workpiece wrapped around the outside of the core forward for the first-stage demolding; during this process, the ejector pin 44, the reset guide post 43 and the male template 2 are all driven by the ejector base plate 42, so the ejector pin 44, the reset guide post 43 and the male template 2 are relatively stationary. As the elastic lateral displacement device 5 continuously moves forward with the ejector base plate 42, the tapered bottom 331 of the first guide post 33 mounted on the spacer plate 3 gradually extends backward into the first through hole 511 of the lateral displacement block 51. During this process, with its tapered bottom 331, it drives the lateral displacement block 51 to move laterally along the accommodation groove 421 against the elastic force of the spring 52 (as shown in the lateral displacement block 51, it moves laterally to the left relative to the ejector base plate 42 and compresses the spring 52) until the first through hole 511 of the lateral displacement block 51 is aligned with the first guide post 33. At this time, the second through hole 512 of the lateral displacement block 51 just aligns with the second guide post 21. In this way, the bottom surface of the second guide post 21 no longer abuts against the front end surface of the lateral displacement block 51 and is no longer driven forward by the elastic lateral displacement device 5, but extends backward into the aligned second through hole 512. Since the second guide post 21 is no longer driven forward, the male template 2 no longer moves forward. At this time, the ejector base plate 42 continues to move forward, and the reset guide post 43 and the ejector pin 44 extend in front of the male template 2 that no longer moves forward under the drive of the ejector base plate 42, and the ejector pin 44 will push the workpiece that has completed the first-stage demolding for the second-stage demolding. After the workpiece completes the second-stage demolding and no longer wraps around the core, it can be unloaded.
[0035] After the workpiece is blanked, the driving device resets backward away from the ejector base plate 42, and the casting machine drives the entire moving die 1 to move forward so that the moving die 1 is closed with the fixed die to mold the next workpiece. Since the reset guide posts 43 have extended in front of the male template 2, during the closing process of the moving die 1 and the fixed die, the fixed die first pushes these reset guide posts 43 to move backward, causing the ejector plate 41, the ejector base plate 42, and the ejector pins 44 to move backward and reset accordingly, and then pushes the male template 2 to move backward and reset; during the backward movement of the ejector base plate 42, since the male template 2 has not moved backward, the second guide posts 21 of the male template 2 continuously move forward away from the second through holes 512 of the transverse movement blocks 51 mounted on the ejector base plate 42 until they leave the second through holes 512, and the first guide posts 33 of the spacer plate 3 also continuously move forward, away from the first through holes 511 of the transverse movement blocks 51 mounted on the ejector base plate 42 (the tapered bottom 331 of the first guide post 33 never completely disengages from the first through hole 511), and the transverse movement blocks 51 are reset under the action of the springs 52, so that their first through holes 511 are restored to not align with the first guide posts 33 and their second through holes 512 are restored to not align with the second guide posts 21. Thus, after the fixed die pushes the male template 2 to move backward and reset, the bottom surfaces of the second guide posts 21 of the male template 2 are reset to abut against the front end surfaces of the transverse movement blocks 51 again.
[0036] In this embodiment, the accommodating groove 421 is formed on the front end surface of the ejector base plate 42, and the elastic transverse movement device 5 is installed in the accommodating groove 421, located between the ejector plate 41 and the ejector base plate 42. To enable the first guide post 33 and the second guide post 21 to extend into the elastic transverse movement device 5, both the ejector plate 41 and the ejector base plate 42 are provided with first avoidance through holes 451 and second avoidance through holes 452. In other embodiments, the elastic transverse movement device 5 can be directly installed on the front end surface of the ejector plate 41, in which case there is no need to form the accommodating groove 421, the first avoidance through holes 451, and the second avoidance through holes 452.
[0037] In this embodiment, when the first guide post 33 aligns with the first through hole 511 of the transverse movement block 51, their front and rear longitudinal axes are collinear, and the same is true for the second guide post 21 when it aligns with the second through hole 512 of the transverse movement block 51. In other embodiments, when the first guide post 33 aligns with the first through hole 511 of the transverse movement block 51, their front and rear longitudinal axes may not be collinear, as long as the diameter of the first guide post 33 is smaller than the diameter of the first through hole 511. The same applies to the second guide post 21, which will not be elaborated here.
[0038] As described above, it is only the implementation mode of the present invention, and the scope of patent protection is not limited thereby. Those skilled in the art make non-substantive changes or substitutions based on the present invention, and still fall within the scope of patent protection.
Claims
1. Two-stage demolding die: It includes a front fixed mold and a rear moving mold; The moving mold includes a front male template and a rear spacer plate. The male template can longitudinally move back and forth relative to the spacer plate. A mold core extending forward is fixedly installed on the spacer plate. The mold core passes through the male template forward and extends to the front of the male template to receive the wrapped formed workpiece; A thimble plate capable of longitudinally moving back and forth relative to the male template is provided behind the spacer plate. Thimbles are installed on the thimble plate. The thimbles pass through the spacer plate forward and extend into the male template, and can be extended to the front of the male template under the drive of the thimble plate; It is characterized in that: An elastic transverse movement device capable of moving transversely relative to the thimble plate is installed in the thimble plate, and first through holes and second through holes spaced from each other are formed therein; A first guide post extending towards the thimble plate is installed on the spacer plate. The first guide post has a tapered bottom extending into the first through hole of the elastic transverse movement device, and the first guide post is not aligned with the first through hole; A second guide post is installed on the male template. It is located beside the first guide post, passes through the spacer plate backward, and its bottom surface abuts against the front end surface of the elastic transverse movement device; When the thimble plate is driven, it drives the thimbles and the elastic transverse movement device installed thereon to move forward together. The elastic transverse movement device pushes the second guide post, thereby driving the male template to move forward relative to the spacer plate and the mold core installed on the spacer plate, and the male template pushes the workpiece wrapped outside the mold core to perform the first-stage demolding; as the elastic transverse movement device moves forward, the tapered bottom of the first guide post gradually extends backward into the first through hole and drives the elastic transverse movement device to move transversely relative to the thimble plate against its own elastic force by virtue of its tapered bottom until the second through hole of the elastic transverse movement device is aligned with the second guide post, and the second guide post can extend into the second through hole and is no longer pushed by the elastic transverse movement device, and the male template is no longer driven to move forward. At this time, the thimbles are still driven by the thimble plate and move forward relative to the male template to extend to the front of the male template, and push the workpiece that has completed the first-stage demolding to perform the second-stage demolding.
2. The secondary demolding mold according to claim 1, wherein Specifically, the elastic transverse movement device moves transversely relative to the thimble plate against its own elastic force until its second through hole is aligned with the second guide post, and its first through hole is exactly aligned with the first guide post.
3. The secondary demolding mold according to claim 2, characterized in that: The elastic transverse movement device includes a transverse movement block. The first through hole and the second through hole are specifically provided on the transverse movement block; a spring is provided beside the transverse movement block. When the tapered bottom of the first guide post continuously extends backward into the first through hole, it drives the transverse movement block to move transversely relative to the thimble plate against the elastic force of the spring by virtue of its tapered bottom. When the first guide post moves forward away from the first through hole, the transverse movement block is reset under the action of the elastic force of the spring until the second through hole is not aligned with the second guide post.
4. The secondary demolding mold according to claim 3, characterized in that: The thimble plate includes a front thimble panel and a rear thimble bottom plate. The thimble panel and the thimble bottom plate are detachably connected together to jointly fix the thimbles; the elastic transverse movement device is specifically provided between the thimble panel and the thimble bottom plate.
5. The secondary demolding mold according to claim 4, characterized in that, A transverse accommodation groove is formed on the front end surface of the thimble bottom plate. The transverse movement block and the spring of the elastic transverse movement device are both accommodated in the accommodation groove. The spring is horizontally arranged, with one end connected to the transverse movement block and the other end connected to the side wall of the accommodation groove.
6. The secondary demolding mold according to any one of claims 1 to 5, characterized in that: There are two elastic transverse displacement devices, which are centrosymmetric about the longitudinal axis center of the ejector plate; correspondingly, there are two first guide posts, which are centrosymmetric about the longitudinal axis center of the ejector plate; correspondingly, there are two second guide posts, which are centrosymmetric about the longitudinal axis center of the ejector plate.