Die runner shearing device and die convenient to take parts

Abstract

The utility model relates to the field of model shearing, solves the problems of low yield and low production efficiency caused by appearance defects possibly appearing when an existing model is taken out, and provides a mold runner shearing device which comprises a shearing insert, a guide rod and a guide block, the shearing insert is provided with a communicating runner, one end of the communicating runner is communicated with a mold cavity, and the other end of the communicating runner is communicated with the mold cavity. The other end is communicated with the fluid injection port; one end of the shearing insert is connected with the guide rod; the guide block is provided with a guide hole matched with the guide rod, the free end of the guide rod is inserted into the guide hole, and the length direction of the guide hole intersects with the moving direction of the shearing insert. The mold runner shearing device provided by the utility model can be suitable for runners of molds with different structures, after a cavity in the mold is filled with fluid and before wax liquid is cooled and hardened, the shearing insert is pulled, so that a product in the cavity and a feeding channel are positioned in respective independent spaces, redundant parts do not need to be cut after hardening, and the mold runner shearing device is convenient to take out and excellent in quality.

Description

Technical Field

[0001] This utility model relates to the field of mold shearing, specifically to a mold flow channel shearing device and a mold that facilitates part removal. Background Technology

[0002] Injection molding is a manufacturing process primarily used to produce parts made of metal, plastic, or other materials. This method involves injecting liquid or semi-solid material into a pre-prepared mold under pressure, allowing the material to cool and solidify to form the desired shape. However, the material at the injection port is not needed in the final product. Currently, the injection port of wax models is mainly removed manually with a blade for removal after the product has cooled and solidified. However, hardened wax has a certain hardness and strength, making removal difficult. This method is inefficient, and if an error occurs during removal, breaking the injection port can cause the wax model to detach from the product surface along with the injection port, creating pits. Ordinary pits require manual repair in subsequent processes, while more severe pits may render the wax model unusable and require re-production, impacting the product production cycle. Utility Model Content

[0003] The purpose of this invention is to provide a mold flow channel shearing device to solve the problem that appearance defects may occur when the existing mold is removed, resulting in low yield and low production efficiency.

[0004] The embodiments of this utility model are achieved through the following technical solutions:

[0005] A mold runner shearing device includes: a shearing insert, a guide rod, and a guide block. The shearing insert has a connecting runner, one end of which is connected to a mold cavity, and the other end of which is connected to a melt injection port. One end of the shearing insert is connected to the guide rod. The guide block has a guide hole that mates with the guide rod, and the free end of the guide rod is inserted into the guide hole. The length direction of the guide hole intersects the moving direction of the shearing insert.

[0006] Preferably, the guide block includes a connecting portion and a guiding portion, the connecting portion being used to connect a driving device; the guiding portion is connected to the side of the connecting portion near the shear insert, the top end of the connecting portion is higher than the top end of the guiding portion, and the guiding hole is provided in the top wall of the guiding portion.

[0007] Preferably, the height difference between the top end of the connecting portion and the top end of the guide portion is not less than the thickness of the shearing insert.

[0008] Preferably, it includes: a driving device connected to the guide block, the driving device being located beside the shearing insert.

[0009] A mold for easy part removal includes: the mold flow channel shearing device and the mold body; the mold body is provided with a moving groove, one end of the moving groove is open, the shearing insert is accommodated in the moving groove and has a degree of freedom of movement in the groove, the mold body is also provided with a cavity and an injection port, the cavity is connected to the injection port through a connecting flow channel.

[0010] Preferably, the moving groove includes: a limiting groove and a main groove that are interconnected; the shearing insert includes: a shearing strip and a limiting block, the communicating channel is disposed in the shearing strip, the shearing strip is housed in the main groove, and the end of the shearing strip extends from the end of the main groove away from the limiting groove and is connected to the guide rod; the limiting block is connected to the shearing strip, the limiting block is housed in the limiting groove, and the width of the limiting groove is greater than the width of the limiting block.

[0011] Preferably, the cavity is provided with a plurality of channels, the shearing insert is provided with a plurality of channels corresponding to the cavity, and a distribution groove is provided between the moving groove and the injection port. One side of the distribution groove in the width direction is connected to the injection port, and the other side of the distribution groove in the width direction is connected to the plurality of channels.

[0012] Preferably, the bottom end of the shearing insert is provided with a positioning hole, and the mold body is provided with a ball screw that mates with the positioning hole; when the positioning hole and the ball screw are misaligned, the spring in the ball screw is in a compressed state.

[0013] Preferably, at least two positioning holes are provided, namely a connecting hole and a shearing hole; when the ball of the ball screw enters the connecting hole, the cavity is connected to the injection port through the connecting flow channel; when the ball of the ball screw enters the shearing hole, the connecting flow channel is offset from at least one of the injection port and the cavity.

[0014] Preferably, the side wall of the mold body is provided with a sliding groove, and the guide block is slidably connected to the sliding groove through a slider.

[0015] This utility model has at least the following beneficial effects:

[0016] The mold runner shearing device provided by this utility model is applicable to runners of molds with different structures. After the mold cavity is filled with melt, the shearing insert is pulled before the melt cools and hardens, so that the product model in the cavity and the melt connected to the runner are in their own independent spaces. After cooling and hardening, there is no need to cut the excess part with a blade, which makes it easy to remove and improves the appearance quality. Subsequent finishing operations are also much easier, and production efficiency is improved. The cooperation between the guide rod and the guide block makes the movement direction of the guide block not in a straight line with the movement direction of the shearing insert, thereby freeing up the space occupied along the movement direction of the shearing insert, so that the device can be laid out more compactly and production efficiency is improved. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the mold flow channel shearing device;

[0019] Figure 2 A schematic diagram of the mold structure for easy part removal;

[0020] Figure 3 This is a schematic diagram of the structure of the phantom.

[0021] Figure 4 This is a sectional view of the mold;

[0022] Figure 5 This is a schematic diagram showing the connection between the guide block and the module.

[0023] Icons: 1-Shearing insert, 11-Shearing strip, 111-Connecting channel, 12-Limiting block, 13-Positioning hole, 131-Connecting hole, 132-Shearing hole, 2-Guide rod, 3-Guide block, 31-Connecting part, 32-Guide part, 321-Guide hole, 33-Slider, 4-Drive device, 5-Mold body, 51-Moving groove, 511-Limiting groove, 512-Main groove, 52-Injection port, 53-Distribution groove, 54-Slide groove, 6-Product, 7-Ball screw. Detailed Implementation

[0024] To make the objectives, methods, and advantages of the embodiments of this utility model clearer, the methods in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0025] Example 1: As Figure 1-2 As shown, a mold runner shearing device includes: a shearing insert 1, a guide rod 2, and a guide block 3. The shearing insert 1 is provided with a connecting runner 111, one end of which is used to connect to the mold cavity, and the other end of which is used to connect to the melt injection port 52. One end of the shearing insert 1 is connected to the guide rod 2. The guide block 3 is provided with a guide hole 321 that cooperates with the guide rod 2. The free end of the guide rod 2 is inserted into the guide hole 321, and the length direction of the guide hole 321 intersects the moving direction of the shearing insert 1.

[0026] In practice, due to the material properties of the wax pattern, cutting the part during the cooling and shaping process can easily lead to surface quality defects in product 6. Therefore, the applicant conceived of the mold runner shearing device in this embodiment, which is suitable for molds used with products 6 of different shapes. The cavity refers to the molding cavity corresponding to the shape of product 6.

[0027] During use, the mold runner shearing device is positioned between the mold cavity and the injection port 52. The melt sequentially enters the cavity through the injection port 52 and the connecting runner 111. At this time, at least two of the following operations can be selected:

[0028] As an example, a hot-cutting method is used: after the cavity is filled with melt, the mold flow channel shearing device is moved to shift the connecting flow channel 111, and the melt inlet of the cavity is cut off. After the melt cools down, the product 6 can be taken out directly without additional cutting operations.

[0029] As an example, a cold-cutting method is used: after the cavity is filled with melt, wait for the melt to cool and solidify, and then move the mold runner shearing device to separate the formed product 6 from the cooled melt in the connecting runner 111.

[0030] The surface quality of product 6 obtained by hot cutting is relatively good, which is suitable for some structures that directly design the feed port on the surface of product 6, without the need to modify the surface of product 6 and the position of the feed port again.

[0031] If the movement of the shearing insert 1 is achieved by using an output shaft that is collinear with the length direction of the telescopic cylinder and the shearing insert 1, the space occupied by the telescopic cylinder and its output shaft will reduce the number of molds per unit area, thus affecting production efficiency. Therefore, in this embodiment, the cooperation between the guide block 3 and the guide rod 2 ensures that the movement direction of the guide block 3 and the movement direction of the shearing insert 1 are not on the same straight line. Figure 1 As shown, the direction of movement of guide block 3 is perpendicular to the direction of movement of shear insert 1.

[0032] Example 2: To further reduce the size of the device, improvements were made based on Example 1, such as... Figure 1-2 As shown, in this embodiment, the guide block 3 includes a connecting part 31 and a guide part 32. The connecting part 31 is used to connect the driving device 4. The guide part 32 is connected to the connecting part 31 on the side near the shearing insert 1. The top end of the connecting part 31 is higher than the top end of the guide part 32. The guide hole 321 is provided on the top wall of the guide part 32.

[0033] In specific implementation, if the top of the connecting part 31 is flush with the top of the guide part 32, the height of the shearing insert 1 and / or the thickness of the mold body 5 need to be increased in order to achieve the connection between the flow channel 111 and the cavity. Therefore, this embodiment improves the structure of the guide block 3, releasing the protrusion space of the shearing insert 1 through the height difference between the connecting part 31 and the guide part 32, so that the top wall of the mold body 5, the top wall of the shearing insert 1 and the top wall of the connecting part 31 can be flush, thereby reducing the overall volume of the mold.

[0034] Example 3: To better achieve mold alignment, improvements were made based on Example 2, such as... Figure 1-2 As shown, in this embodiment, the height difference between the top end of the connecting part 31 and the top end of the guide part 32 is not less than the thickness of the shearing insert 1.

[0035] In practical implementation, the mold typically includes an upper mold and a lower mold. The cavity is formed by the mating of the upper and lower molds. The accompanying drawings in this invention can be considered as showing only the upper or lower mold. To ensure that the top wall of the shear insert 1 is flush with the top wall of the mold body 5, the space created by the height difference between the connecting part 31 and the guide part 32 needs to be able to completely accommodate the shear insert 1 in the longitudinal direction. If the top wall of the shear insert 1 is higher than the top wall of the mold, it may affect the sealing performance when the molds are mated.

[0036] Example 4: Figure 1-2 As shown, in this embodiment, it includes: a driving device 4, which is connected to the guide block 3 and is located beside the shearing insert 1.

[0037] In specific implementation, the drive device 4 can be a telescopic cylinder or a telescopic hydraulic cylinder, such as a double-jointed flat cylinder. Figure 2 As shown, the cylinder is installed on the side wall of the mold body 5. The cylinder pushes the guide block 3 with the guide hole 321 to move. When the side wall of the guide hole 321 contacts the guide rod 2 of the shearing insert 1, the inner wall of the guide hole 321 guides the shearing insert 1 to move. The cylinder retracts to guide the shearing insert 1 to reset. Figure 3 As shown, the straight line extending from the guide hole 321 can form an acute or obtuse angle with the straight line extending from the length of the shear insert 1.

[0038] Example 5: Figure 2-3 As shown, this embodiment provides a mold for easy part removal, including: the mold flow channel shearing device and the mold body 5; the mold body 5 is provided with a moving groove 51, one end of the moving groove 51 is open, the shearing insert 1 is accommodated in the moving groove 51 and has a degree of freedom of movement in the groove, the mold body 5 is also provided with a cavity and an injection port 52, the cavity is connected to the injection port 52 through a connecting flow channel 111.

[0039] In the specific implementation process, in order to install the mold flow channel shearing device, this embodiment adds a moving groove 51 to the mold body 5. The shearing insert 1 can be slidably connected to the bottom wall of the moving groove 51, or it can be directly placed in the moving groove 51. The moving stability of the shearing insert 1 is improved by the cooperation of the guide rod 2 and the moving groove 51.

[0040] Example 6: To achieve limiting the movement of the shear insert 1, improvements were made based on Example 5, such as... Figure 2-3 As shown, in this embodiment, the moving groove 51 includes a limiting groove 511 and a main groove 512 that are interconnected; the shearing insert 1 includes a shearing strip 11 and a limiting block 12, the connecting channel 111 is disposed in the shearing strip 11, the shearing strip 11 is accommodated in the main groove 512, and the end of the shearing strip 11 extends from the end of the main groove 512 away from the limiting groove 511 and is connected to the guide rod 2; the limiting block 12 is connected to the shearing strip 11, the limiting block 12 is accommodated in the limiting groove 511, and the width of the limiting groove 511 is greater than the width of the limiting block 12.

[0041] In specific implementation, the width of the limiting groove 511 refers to the length of the limiting groove 511 in the moving direction of the shear insert 1. The shear insert 1 can be configured as follows: Figure 2 The T-shape shown. The limit distance of the shear insert 1 can be limited by the cooperation between the limiting block 12 and the limiting groove 511. When the movement of the shear insert 1 is manually operated, the end of the shear insert 1 away from the limiting groove 511 can also be set into a T-shape for easy gripping and force application.

[0042] Example 7: To achieve the molding of multiple products 6 in one step, improvements were made based on Example 5, such as... Figure 2-3 As shown, in this embodiment, the cavity is provided with a plurality of channels, the shearing insert 1 is provided with a plurality of channels 111 corresponding to the cavity, and the moving groove 51 and the injection port 52 are provided with a distribution groove 53. One side of the distribution groove 53 in the width direction is connected to the injection port 52, and the other side of the distribution groove 53 in the width direction is connected to the plurality of channels 111.

[0043] In the specific implementation process, when a mold is used to form multiple products 6, each cavity requires an inlet flow channel. Therefore, this embodiment sets up a distribution groove 53 and sets up several connecting flow channels 111 on the shearing insert 1. The melt enters the distribution groove 53 from the injection port 52 and then enters each connecting flow channel 111, realizing the pouring of multiple cavities from one injection port 52 and ensuring the synchronization of the melt volume in each cavity at the same time to a certain extent.

[0044] Example 8: To achieve the limiting and positioning of the shearing insert 1, improvements were made based on Examples 5-7, such as... Figure 4 As shown, in this embodiment, the bottom end of the shearing insert 1 is provided with a positioning hole 13, and the mold body 5 is provided with a ball screw 7 that cooperates with the positioning hole 13; when the positioning hole 13 and the ball screw 7 are misaligned, the spring in the ball screw 7 is in a compressed state.

[0045] In the specific implementation process, the ball screw 7 is a derivative product 6 of the set screw, which consists of a spring, a steel ball, and a housing. When the positioning hole 13 is misaligned with the ball screw 7, the bottom wall of the shear insert 1 presses down on the steel ball, the spring contracts, and the steel ball enters the housing. When the positioning hole 13 is aligned with the ball screw 7, the steel ball enters the positioning hole 13 under the action of the spring's rebound force to achieve positioning and limiting.

[0046] Example 9: To achieve the positioning of the shearing insert 1 in both the connected and sheared states, improvements were made based on Example 8, such as... Figure 4 As shown, in this embodiment, the positioning hole 13 is provided with at least two holes, namely a connecting hole 131 and a shearing hole 132; when the ball of the ball screw 7 enters the connecting hole 131, the cavity is connected to the injection port 52 through the connecting flow channel 111; when the ball of the ball screw 7 enters the shearing hole 132, the connecting flow channel 111 is offset from at least one of the injection port 52 and the cavity.

[0047] In specific implementation, the shear insert 1 can be limited during melt pouring and during its movement to connect with the cavity via the connecting hole 131. The shear hole 132 can be used to position the connecting channel 111 when it is misaligned with the cavity inlet and to limit the shear insert 1 after misalignment.

[0048] Example 10: To improve the movement stability of the guide block 3 and reduce the radial force on the output shaft of the drive device 4, improvements were made based on Example 8, such as... Figure 5 As shown, in this embodiment, the side wall of the mold body 5 is provided with a groove 54, and the guide block 3 is slidably connected to the groove 54 through a slider 33.

[0049] In the specific implementation process, since the guide block 3 is located on the side of the mold body 5 in this embodiment, if it is driven by the drive device 4, the output shaft of the drive device 4 will directly bear the weight of the guide block 3. Thus, in this embodiment, the guide block 3 can be supported to a certain extent by the slide groove 54, and the stability of the guide block 3 when it moves can also be improved.

[0050] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mold runner shearing device characterized by, include: A shearing insert (1) is provided with a connecting channel (111), one end of which is used to connect to the mold cavity, and the other end of which is used to connect to the melt injection port (52). Guide rod (2), one end of the shear insert (1) is connected to the guide rod (2); The guide block (3) is provided with a guide hole (321) that cooperates with the guide rod (2). The free end of the guide rod (2) is inserted into the guide hole (321). The length direction of the guide hole (321) intersects with the moving direction of the shearing insert (1).

2. The mold runner shear apparatus of claim 1, wherein, The guide block (3) includes: A connecting part (31) is used to connect a drive device (4); The guide portion (32) is connected to the connecting portion (31) on the side near the shear insert (1). The top end of the connecting portion (31) is higher than the top end of the guide portion (32). The guide hole (321) is provided on the top wall of the guide portion (32).

3. The mold runner shear apparatus of claim 2, wherein, The height difference between the top end of the connecting part (31) and the top end of the guide part (32) is not less than the thickness of the shearing insert (1).

4. The mold runner shear apparatus of any of claims 1-3, wherein, include: A driving device (4) is connected to the guide block (3) and is located on the side of the shearing insert (1).

5. A mold facilitating the removal of a part, characterized in that, include: The mold flow channel shearing device according to any one of claims 1-4; The mold body (5) is provided with a moving groove (51), one end of which is open. The shearing insert (1) is housed in the moving groove (51) and has a degree of freedom of movement within the groove. The mold body (5) is also provided with a cavity and an injection port (52). The cavity is connected to the injection port (52) through a connecting channel (111).

6. The draft facilitating mold of claim 5, wherein, The moving slot (51) includes: a limiting slot (511) and a main slot (512) that are interconnected; The shearing insert (1) includes: A shearing strip (11) is provided in the shearing strip (11), the shearing strip (11) is housed in the main groove (512), and the end of the shearing strip (11) extends from the end of the main groove (512) away from the limiting groove (511) and is connected to the guide rod (2). A limiting block (12) is connected to the shearing strip (11). The limiting block (12) is accommodated in the limiting groove (511), and the width of the limiting groove (511) is greater than the width of the limiting block (12).

7. The draft facilitating mold of claim 5, wherein The cavity is provided with a plurality of channels, and the shearing insert (1) is provided with a plurality of channels (111) corresponding to the cavity. A distribution groove (53) is provided between the moving groove (51) and the injection port (52). One side of the distribution groove (53) in the width direction is connected to the injection port (52), and the other side of the distribution groove (53) in the width direction is connected to the plurality of channels (111).

8. The draft facilitating mold of any of claims 5-7, wherein, The bottom end of the shearing insert (1) is provided with a positioning hole (13), and the mold body (5) is provided with a ball screw (7) that mates with the positioning hole (13); When the positioning hole (13) is misaligned with the ball screw (7), the spring in the ball screw (7) is in a compressed state.

9. The draft facilitating mold of claim 8, wherein, The positioning hole (13) is provided with at least two holes, namely a connecting hole (131) and a shearing hole (132); When the ball of the ball screw (7) enters the connecting hole (131), the cavity is connected to the injection port (52) through the connecting flow channel (111); When the ball of the ball screw (7) enters the shear hole (132), the connecting channel (111) is offset from at least one of the injection port (52) and the cavity.

10. The draft facilitating mold of claim 8, wherein, The side wall of the mold (5) is provided with a groove (54), and the guide block (3) is slidably connected to the groove (54) through a slider (33).

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