Injection mold with pitched roof loose core

Abstract

The utility model relates to the field of injection molding, and discloses an injection mold with a pitched roof core-pulling function, which is characterized in that a sliding frame is linked with a sliding block, a limiting piece is vertically fixed on the sliding frame, a sliding chute is horizontally formed in a fixed frame, a limiting block slides in the sliding chute, and the sliding frame drives the limiting piece to vertically slide on the limiting block or be pulled away from the limiting block. One side of the sliding block is connected with the injection mold core and provided with a swing groove communicated with the forming cavity, the swing groove is communicated with the sliding groove, an inclined ejection piece is arranged in the swing groove so as to seal the forming cavity, the inclined ejection piece and the swing groove are connected in an embedded mode through various slopes, and the inclined ejection piece is hinged to the limiting block through the sliding block. The sliding frame drives the sliding block and the limiting block to slide relatively, an inclined plane mechanism is arranged between the limiting piece and the limiting block, the inclined plane mechanisms at the swing groove and the shovel base can drive the inclined ejection piece to be disengaged from the product and reset, and meanwhile the limiting block can drive the sliding block and the inclined ejection piece to be disengaged from the product in different periods. And the product and the mold are separated from each other during demolding.

Description

Technical Field

[0001] This utility model relates to the field of injection molding, specifically to an injection mold with a slanted core-pulling mechanism. Background Technology

[0002] Injection molding is an important manufacturing method in the production of automotive parts, mainly used to produce various plastic parts such as dashboards, bumpers, and interior trim components. This process involves heating and melting plastic raw materials, injecting them into a mold, and then cooling and solidifying them to form the desired shape. It is characterized by high efficiency, precision, and consistency, making it an indispensable part of automobile manufacturing.

[0003] Existing injection molds include a frame, a fixed frame fixedly mounted on the frame, and a sliding frame slidably mounted on the frame. The injection mold core assembly is installed between the sliding frame and the fixed frame. The injection mold core forms a molding cavity for product molding. The sliding frame drives the mold core assembly to open and close, and in conjunction with the ejection assembly mounted on the frame, the product is injection molded and ejected. Because the injection molded products required for automobiles have complex shapes, pre-reserved slots or holes (i.e., pre-reserved notches) need to be formed during injection molding. This results in some injection molded parts having interlocking connections with the internal structure of the injection mold core. Demolding causes product deformation, requiring secondary processing, increasing production costs, and reducing production efficiency. Based on this, the following improvements are proposed. Utility Model Content

[0004] The present invention aims to provide an injection mold with a slanted core-pulling mechanism to solve the problem of difficult demolding at the connection between the mold and the product.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an injection mold with a slanted core pull, wherein a sliding frame is vertically slidably installed on the machine frame, a fixed frame is horizontally slidably connected to a slider, the sliding frame and the slider are linked, a swing component is provided at the end of the slider near the injection mold core, the swing component is used to seal the molding cavity, a protrusion for forming a pre-reserved notch in the product is provided at the end of the swing component near the molding cavity, a limiting component is fixedly provided on the sliding frame, a limiting block is horizontally slidably provided on the slider, the limiting component slides vertically on the limiting block, the sliding frame can drive the limiting component to disengage from and embed into the limiting block, the sliding frame drives the limiting block to slide relative to the slider through the limiting component, a first inclined part is provided between the slider and the swing component, the first inclined part is used to drive the protrusion to disengage from the product, the swing component is hinged to the limiting block through the slider, the relative sliding distance between the limiting component and the limiting block is equal to the relative sliding distance between the limiting block and the slider, a second inclined part is provided between the limiting component and the limiting block, the second inclined part is used to drive the swing component to reset.

[0006] The beneficial effects of this solution are as follows: the protrusion at the end of the swing assembly engages with the product during casting. When the slider is demolded, the engagement point between the protrusion and the product obstructs the demolding direction. By setting a limiting member and a limiting block, the vertical sliding of the sliding frame is restricted by the limiting member, thus the sliding of the slider does not affect the stationary position of the limiting block. Since the relative sliding distance between the limiting member and the limiting block is equal to the relative sliding distance between the limiting block and the slider, when the sliding frame slides upward, the limiting member and the limiting block disengage, and the slider and the limiting block stop relative sliding. The slider drives the limiting block to continue sliding, so the limiting block begins to drive the swing assembly to slide a small distance within the slider. At this time, through the first inclined part, the swing assembly swings within the slider and drives the protrusion to disengage from the product. At this time, the product demolding is completed. When resetting, the sliding frame slides vertically downward. At this time, the limiting member and the limiting block drive the swing assembly to reset first through the second inclined part, and then the slider resets. Compared with the prior art, this solution can satisfy the demolding process in two intersecting directions.

[0007] Preferably, as an improvement, the sliding frame is fixedly provided with a top column, the top column is inclinedly provided on the sliding frame, and the slider is provided with a drive hole for the top column to pass through, the drive hole is inclined and has the same inclination angle as the top column.

[0008] Preferably, as an improvement, the oscillating assembly includes an oscillating groove formed in the slider, an inclined ejector embedded in the oscillating groove, a protrusion disposed at the end of the inclined ejector near the molding cavity, and an oscillating gap provided between the inclined ejector and the oscillating groove.

[0009] Preferably, as an improvement, the inclined top member includes a rectangular block and an irregularly shaped block, with the two sides of the rectangular block and the irregularly shaped block being smoothly connected and intersecting, respectively. The swing groove includes a rectangular groove and an irregularly shaped groove corresponding to the rectangular block and the irregularly shaped block, respectively. The rectangular groove is opened at an angle relative to the slider moving direction. The first inclined part includes a driving surface and a driven surface respectively disposed on the rectangular groove and the rectangular block. The driving surface and the driven surface are both located on the side where the rectangular block and the irregularly shaped block of the inclined top member intersect.

[0010] The beneficial effect is that by setting the rectangular groove to be inclined in the direction of slider movement, when the slider slides and the inclined ejector is stationary, the driving surface presses against the driven surface, thereby achieving the purpose of driving the inclined ejector to rotate on the limiting block through the slider. That is, the inclined ejector is hinged to the limiting block through the slider. When the limiting block rotates, the driving protrusion disengages from the reserved notch of the injection molded product, thereby disengaging the product's snap-fit ​​joint from the injection mold.

[0011] Preferably, as an improvement, the slider is also provided with a sliding groove for the limit block to slide, the sliding groove is connected to the swing groove, the limit block is vertically provided with a connecting shaft, and the inclined top is rotatably connected to the limit block through the connecting shaft.

[0012] Preferably, as an improvement, the limiting member is set as a shovel base, the shovel base includes a mounting seat at the top for fixing to the sliding frame and a guide rod vertically fixed to the mounting seat, the limiting block is provided with a limiting groove for the guide rod to slide vertically, and the second inclined part includes a guide surface inclinedly disposed at the bottom end of the guide rod near the swing assembly and a vertical surface of the limiting groove near the swing assembly.

[0013] The beneficial effects are as follows: During the reset process, the sliding frame simultaneously drives the slider to slide and the shovel base to move downward. Since the slide groove has not yet abutted against the limit block, the shovel base drives the limit block to slide through the guide surface, which in turn drives the inclined ejector to slide in the swing groove towards the injection mold core. At the same time, due to the obtuse angle setting of the irregular block and the rectangular block, it does not affect its reset, and the reset of the inclined ejector can be realized.

[0014] Preferably, as an improvement, the distance difference between the slide groove and the limiting block in the sliding direction of the slider is equal to the length of the guide rod.

[0015] The beneficial effects are as follows: During the demolding process, the slide groove abuts against the limiting component while the shovel base is pulled out from the limiting groove. At this time, the slide moves against the limiting block until it stops. That is, during demolding, the movement of the slide and the limiting block is from relative sliding to relative stillness. When the mold is closed, the shovel base drives the limiting block to move, and the slide also slides, but at different speeds, until the inner wall on the other side of the slide groove abuts against the limiting block and drives the limiting block to slide together. Therefore, it is also from relative sliding to relative stillness. This can ensure that the slide and the inclined ejector have different movements during demolding and mold closing, so that they demold at different times.

[0016] Preferably, as an improvement, the angle between the intersection of the rectangular block and the irregular block is an obtuse angle, and there is no angle between the rectangular block and the irregular block on the side away from the driven surface. The swing gap is set between the side of the inclined top member away from the driven surface and the swing groove.

[0017] The beneficial effects are as follows: the swing groove slides in the direction away from the shaped block of the inclined top part. By setting the obtuse angle, the driving surface drives its swing without interfering with the mutual movement between the surface of the shaped block and the surface of the shaped groove, thus achieving the purpose of relative sliding between the inclined top part and the swing groove. Attached Figure Description

[0018] Figure 1 This is an exploded structural diagram of the overall structure of the injection-molded product according to an embodiment of the present utility model;

[0019] Figure 2 This is an exploded view of the slider structure and the product according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the swing mechanism and product fastening structure in an embodiment of this utility model;

[0021] Figure 4 for Figure 3A partial cross-sectional structural diagram of the connection between the inclined top component and the product at point A;

[0022] Figure 5 This is an exploded structural diagram showing the fit between the inclined top component, the limiting component, and the product in an embodiment of this utility model;

[0023] Figure 6 for Figure 5 A partial structural diagram of the connection between the inclined top component and the product at point B;

[0024] Figure 7 This is a schematic diagram of the overall structure of the slider in an embodiment of the present utility model;

[0025] Figure 8 This is a schematic diagram of the overall structure of the limiting block in an embodiment of the present utility model;

[0026] Figure 9 This is a cross-sectional structural diagram of the limiting block according to an embodiment of the present utility model;

[0027] Figure 10 This is a schematic diagram of the shovel base structure according to an embodiment of the present utility model;

[0028] Figure 11 This is a schematic diagram of the inclined top component structure in an embodiment of this utility model. Detailed Implementation

[0029] The following detailed description illustrates the specific implementation method:

[0030] The reference numerals in the accompanying drawings include: sliding frame 1, shovel base 11, mounting base 111, guide rod 112, guide surface 113, top column 12, fixed frame 2, slider 21, limit block 211, limit groove 2111, connecting shaft 2112, drive hole 212, slide groove 22, demolding inner wall 221, reset inner wall 222, injection mold core 3, moving mold 31, stationary mold 32, swing assembly 4, swing groove 41, rectangular groove 411, drive surface 4111, irregular groove 412, inclined ejector 42, rectangular block 421, driven surface 4211, irregular block 422, protrusion 421, and product 5.

[0031] Example

[0032] The basic implementation examples are as follows: Figures 1-11 As shown, Figures 1-2The injection mold shown includes a frame, a sliding frame 1 vertically slidably connected to the top of the frame, and a fixed frame 2 fixedly installed at the bottom of the frame. An injection mold core 3 and a slider 21 are arranged sequentially from left to right between the fixed frame 2 and the sliding frame 1. The injection mold core 3 includes a moving mold 31 fixed to the sliding frame 1 and a stationary mold 32 fixed to the fixed frame 2. A molding cavity for molding the product 5 is opened between the moving mold 31 and the stationary mold 32. The molding cavity is located on one side of the slider 21. 21 is slidably connected to the right side of the fixed frame 2, and the sliding direction is left and right. When the mold is closed, the left end of the slider 21 abuts against the injection mold core 3 and seals the molding cavity. The sliding frame 1 is fixedly installed with an inclined top post 12. The slider 21 has an inclined drive hole 212 for the top post 12 to pass through and slide. The diameter of the drive hole 212 is equal to the diameter of the top post 12. The drive hole 212 passes through the slider 21 and the vertical inclination angle of the drive hole 212 inside the slider 21 is equal to the vertical inclination angle of the top post 12.

[0033] like Figures 2-3 As shown, a swing groove 41 is provided on one side of the injection mold core 3 of the slider 21. The swing groove 41 penetrates the left end of the slider 21. When the mold is closed, the swing groove 41 is connected to the molding cavity. The slider 21 is also provided with a sliding groove 22. The sliding groove 22 is located on the side of the slider 21 away from the swing groove 41. The sliding groove 22 is connected to the swing groove 41. A limit block 211 is slidably connected to the sliding groove 22 in the left and right directions. The sliding groove 22 is set to open upward in the slider 21. A countersunk platform is provided on both sides of the top of the sliding groove 22. A countersunk platform is also fixedly provided on the top of the limit block 211. When the limiting block 211 is slidably installed on the slider 21, it is fixed to the slider 21 by bolts through the pressure strip to prevent the limiting block 211 from sliding vertically, so that the limiting block 211 can only move left and right along the slide groove 22. The end of the limiting block 211 near the swing groove 41 is vertically provided with a connecting shaft 2112. The limiting block 211 is horizontally rotatably connected to the inclined top member 42 through the connecting shaft 2112. The side of the inclined top member 42 away from the limiting block 211 is embedded in the swing groove 41. The swing groove 41 and the inclined top member 42 together form the swing assembly 4.

[0034] like Figures 4-6As shown, the inclined ejector 42 includes a shaped block 422 and a rectangular block 421, which are integrally formed and arranged sequentially from the injection mold core 3 to the limiting block 211. The two sides of the inclined ejector 42 are a smooth surface where the shaped block 422 and the rectangular block 421 are smoothly connected, and an intersecting surface where the shaped block 422 and the rectangular block 421 intersect. The included angle of the intersecting surface is an obtuse angle, and the smooth surface is a plane. The swing groove 41 includes a shaped groove 412 and a rectangular groove 411 corresponding to the shaped block 422 and the rectangular block 421, respectively. The swing groove 41 has a swing gap with one side of the smooth surface of the inclined ejector 42. A first inclined portion is formed between the parts 42. The first inclined portion includes a driving surface 4111 and a driven surface 4211. The driving surface 4111 is configured as a rectangular groove 411 located on the inner wall of one side of the cross surface. The driven surface 4211 is configured as a rectangular block 421 located on the outer wall of one side of the cross surface. The irregular surface is opened on the side near the injection mold core 3 and the molding cavity is sealed by the end of the irregular block 422 of the inclined ejector 42. A protrusion 421 is fixedly provided at the end of the inclined ejector 42 near the sealing cavity for forming the reserved hole or reserved groove, i.e., the reserved notch, of the injection molded product 5. The protrusion 421 is set perpendicular to the irregular block 422. After the product 5 is injection molded, the product 5 and the protrusion 421 of the inclined ejector 42 are engaged.

[0035] like Figure 2 , Figure 9 , Figure 10 As shown, a limiting component is fixedly installed at the bottom of the sliding frame 1 by bolts. The limiting component is a shovel base 11. The shovel base 11 includes a mounting seat 111 bolted to the sliding frame 1 and a guide rod 112 integrally formed with the mounting seat 111. The guide rod 112 is located at the bottom of the mounting seat 111 and is vertically connected to the mounting seat 111. The horizontal cross-section of the guide rod 112 is rectangular, and the bottom end of the guide rod 112 is inclined with a guide surface 113 on the side near the injection mold core 3. The limiting block 211 is vertically provided with a limiting groove 2111 for the guide rod 112 to be inserted and slide. The horizontal cross-section of the limiting groove 2111 is also rectangular and its size is equal to that of the horizontal cross-section of the guide rod 112. The guide surface 113 at the bottom end of the guide rod 112 and the inner wall of the limiting groove 2111 on the side near the injection mold core 3 together form a second inclined part for resetting the inclined ejector 42.

[0036] like Figures 3-6As shown, the horizontal cross-sections of the slide 22 and the limiting block 211 are both rectangular in shape with the long side in the left and right directions. The inner walls of the slide 22 near the injection mold and away from the injection mold are respectively set as the demolding inner wall 221 and the reset inner wall 222. The length between the demolding inner wall 221 and the reset inner wall 222 is the left and right length of the slide 22. The difference between the left and right length of the slide 22 and the left and right length of the limiting block 211 is equal to the vertical length of the guide rod 112. This makes the distance of relative sliding between the limiting block 211 and the slider 21 equal to the relative sliding time and distance of the shovel base 11 in the limiting groove 2111. In this embodiment, the vertical inclination of the top column 12 is set to 45°.

[0037] Its working principle is as follows: During injection molding, the casting material is formed and a reserved notch is formed at the inclined ejector 42 through the protrusion 421, and the reserved notch is engaged with the protrusion 421. When the product 5 is demolded, the sliding frame 1 is driven to slide vertically upward through the external equipment. When the sliding frame 1 slides upward, the slide block 21 is pushed by the ejector 12 to slide away from the injection mold core 3. At this time, the guide rod 112 is still embedded in the limiting groove 2111 and slides upward. Therefore, the limiting block 211 and the inclined ejector 42 do not move in the left and right directions. However, at this time, the inclined rectangular groove 411 slides in a straight line in the left and right straight direction away from the injection mold core 3. Therefore, the driving surface 4111 squeezes the driven surface 4211, causing the inclined ejector 42 to swing towards the smooth surface in the swing groove 41. After swinging, the protrusion 421 is pulled out from the reserved notch. At this time, the engagement between the product 5 and the protrusion 421 has been completed.

[0038] Furthermore, the shovel base 11 continues to move upward while the slider 21 moves to the right. When the guide rod 112 completely disengages from the limiting groove 2111, the side of the demolding inner wall 221 that is close to the limiting block 211 just abuts. Driven by the ejector pin 12, the slider 21 continues to move to the right and drives the end of the inclined ejector 42 to disengage from the product 5 in the left and right directions. When the slider 21 drives the limiting block 211 to move through the demolding inner wall 221, the inner wall of the limiting groove 2111 on the side close to the injection mold core 3 is always within the horizontal projection plane of the guide surface 113. Then, the ejection mechanism on the frame pushes the product 5 out of the stationary mold 32.

[0039] During reset, the sliding frame 1 moves downward, the slider 21 moves in the opposite direction, the shovel base 11 slides downward, the demolding inner wall 221 disengages from the limiting block 211 and slides to the left. At this time, the reset inner wall 222 slides towards the side close to the limiting block 211. The guide surface 113 first contacts the vertical inner wall of the limiting groove 2111 close to the injection mold core 3 and drives it to move to the left, so that the limiting block 211 drives the protrusion 421 of the inclined ejector 42 to reset. After the reset inner wall 222 contacts the limiting block 211, the slider 21 drives the inclined ejector 42 to reset in the left and right directions.

[0040] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An injection mold with a slanted core-pulling mechanism, wherein a sliding frame is vertically slidably mounted on a machine frame, and a fixed frame is horizontally slidably connected to a slider, characterized in that: The sliding frame is linked to the slider. A swing component is provided at the end of the slider near the injection mold core. The swing component is used to seal the molding cavity. A protrusion for forming a pre-reserved notch in the product is provided at the end of the swing component near the molding cavity. A limit member is fixedly provided on the sliding frame. A limit block is provided for the slider to slide horizontally. The limit member slides vertically on the limit block. The sliding frame can drive the limit member to disengage from and engage with the limit block. The sliding frame drives the limit block to slide relative to the slider through the limit member. A first inclined part is provided between the slider and the swing component. The first inclined part is used to drive the protrusion to disengage from the product. The swing component is hinged to the limit block through the slider. The relative sliding distance between the limit member and the limit block is equal to the relative sliding distance between the limit block and the slider. A second inclined part is provided between the limit member and the limit block. The second inclined part is used to drive the swing component to reset.

2. The injection mold according to claim 1, characterized in that: The sliding frame is fixedly equipped with a top column, which is inclined on the sliding frame. The slider has a drive hole for the top column to pass through, and the drive hole is inclined at the same angle as the top column.

3. The injection mold according to claim 1, characterized in that: The oscillating assembly includes an oscillating groove formed in the slider, an inclined ejector embedded in the oscillating groove, a protrusion disposed at the end of the inclined ejector near the molding cavity, and an oscillating gap provided between the inclined ejector and the oscillating groove.

4. The injection mold according to claim 3, characterized in that: The inclined top component includes a rectangular block and an irregularly shaped block, with smooth connection and intersecting connection on both sides of the rectangular block and the irregularly shaped block, respectively. The swing groove includes a rectangular groove and an irregularly shaped groove corresponding to the rectangular block and the irregularly shaped block, respectively. The rectangular groove is opened at an angle relative to the slider movement direction. The first inclined part includes a driving surface and a driven surface respectively disposed on the rectangular groove and the rectangular block. The driving surface and the driven surface are both located on the side where the rectangular block and the irregularly shaped block of the inclined top component intersect.

5. The injection mold according to claim 4, characterized in that: The slider also has a groove for the limit block to slide in. The groove is connected to the swing groove. The limit block is vertically provided with a connecting shaft. The inclined top is rotatably connected to the limit block through the connecting shaft.

6. The injection mold according to claim 5, characterized in that: The limiting component is set as a shovel base, which includes a mounting base at the top for fixing to the sliding frame and a guide rod vertically fixed to the mounting base. The limiting block has a limiting groove for the guide rod to slide vertically. The second inclined part includes a guide surface inclinedly disposed at the bottom end of the guide rod near the swing assembly and a vertical surface of the limiting groove near the swing assembly.

7. The injection mold according to claim 6, characterized in that: The distance difference between the slide groove and the limiting block in the sliding direction of the slider is equal to the length of the guide rod.

8. The injection mold according to claim 4, characterized in that: The angle between the rectangular block and the irregular block at their intersection is an obtuse angle. There is no angle between the rectangular block and the irregular block on the side away from the driven surface. The swing gap is set between the side of the inclined top member away from the driven surface and the swing groove.

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