Injection mold with pitched roof anti-locking structure

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold with a pitched roof anti-locking structure, which comprises a fixed mold and a movable mold assembled below the fixed mold, a fixed mold plate is fixedly mounted on the fixed mold, a cushion block is fixedly mounted at the bottom of the movable mold, a movable mold plate is fixedly mounted at the bottom end of the cushion block, and a spring column is fixedly mounted on the movable mold plate. An ejector plate is sleeved outside the spring column, the top end of the spring column is inserted into the movable mold, and an anti-locking structure is arranged between the ejector plate and the lower mold core. In the material injection process, after the lower mold core in the mold cavity is pressed under the pressure generated during injection of injection molding materials, a deformable range exists in the mold cavity through the anti-locking structure, a formed workpiece in the mold cavity is prevented from being directly locked after being formed, and after the workpiece is formed, the inclined ejector rod demolds the workpiece in the mold cavity and the lower mold core through the anti-locking structure. And the formed workpiece is prevented from being stuck during demolding in the demolding process, and finally the formed workpiece in the cavity is pushed down.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold with an inclined ejector anti-jamming structure. Background Art

[0002] In the injection molding process, plastic particles are heated and melted and then injected into the mold by an injection molding machine. After cooling and solidification, the required plastic products are finally formed. Injection molds usually include an upper mold, a lower mold, an ejector plate, etc. When it is hardened and shaped into an injection product, then the mold is opened to separate the fixed mold and the movable mold. Finally, the injection product is ejected through the ejector plate and the inclined ejector, which is convenient for exhaust and reduces the resistance during mold opening and closing, making the mold open and close more smoothly.

[0003] In the prior art, a patent with the publication number of CN217862583U discloses a semi-circular shell forming mold, including a fixed mold, a concave mold is provided on the fixed mold, a first forming column for forming a first groove is arranged on the concave mold, a movable mold, a core is provided on the movable mold, and the movable mold is used to be combined with the fixed mold to form a mold set. When the movable mold and the fixed mold are combined, a cavity consistent with the shape of the body part is formed by surrounding between the core and the concave mold, and a core-pulling assembly and an ejecting mechanism for forming a second groove are arranged on the movable mold.

[0004] The above structure uses the inclined ejector to facilitate the separation of the forming insert and the workpiece. However, under the injection pressure of the injection plastic and when the mold core and the workpiece are demolded, the deformable range between the workpiece and the mold core is small and it is easy to get stuck. Summary of the Utility Model

[0005] In view of this, the purpose of the present utility model is to provide an injection mold with an inclined ejector anti-jamming structure to solve the problem that the deformable range between the workpiece and the mold core is small and it is easy to get stuck under the injection pressure of the injection plastic and when the mold core and the workpiece are demolded.

[0006] Based on the above purpose, the present utility model provides an injection mold with an inclined ejector anti-jamming structure, including a fixed mold and a movable mold assembled under the fixed mold. An upper mold core is arranged in the fixed mold, a lower mold core is arranged in the movable mold, a plurality of cavities are opened between the upper mold core and the lower mold core, and an injection port communicated with the cavity is opened on the fixed template;

[0007] A fixed template is fixedly installed on the fixed mold, a cushion block is fixedly installed at the bottom of the movable mold, a movable template is fixedly installed at the bottom end of the cushion block, a spring column is fixedly installed on the movable template, a top plate is sleeved outside the spring column, the top end of the spring column is inserted into the movable mold, and an anti-jamming structure is arranged between the top plate and the lower mold core;

[0008] The anti-jamming structure includes a through hole opened inside the lower die insert. An ejector pin is inserted into the through hole. An I-shaped block is rotatably installed at the bottom end of the ejector pin, and a fixing seat is sleeved outside the ejector pin. A connecting block is slidably installed at the bottom end of the I-shaped block, and the connecting block is fixedly installed on the ejector plate.

[0009] A slot for the ejector pin to penetrate is opened inside the moving die. The connecting block is clamped inside the slot. An inclined hole channel is opened inside the connecting block. Elastic inclined blocks are slidably installed on both sides of the inner wall of the inclined hole channel, and the elastic inclined blocks are in contact with the ejector pin.

[0010] Preferably, the anti-jamming structures are symmetrically arranged with the center of the cavity as the reference, and an eight-shaped structure is formed between adjacent anti-jamming structures.

[0011] Preferably, a clamping groove communicating with the cavity is opened on one side of the ejector pin, and at least four groups of ejector pins are provided.

[0012] Preferably, the connecting block and the ejector plate, and the slot and the fixing seat are connected by fastening bolts, and the width of the connecting block is greater than the width of the I-shaped block.

[0013] Preferably, multiple support vertical rods are installed between the lower die insert and the ejector plate, and the support vertical rods are distributed around the cavity.

[0014] Preferably, a rotating groove for accommodating the end of the ejector pin is opened at the top of the I-shaped block, and the opening angle of the rotating groove is greater than the angle of the end of the ejector pin.

[0015] The beneficial effects of the present utility model: During the injection process, due to the pressure generated during the injection of the injection molding material, after the lower die insert in the cavity is pressed, the anti-jamming structure is used to make there be a deformable range in the cavity, avoiding the formed workpiece in the cavity from being directly jammed after molding;

[0016] When the workpiece is molded, the injection molding machine is used to drive the moving die to move downward to separate the moving die from the fixed die. After the upper die insert and the lower die insert are separated, the anti-jamming structure is used to make the ejector pin demold the workpiece in the cavity from the lower die insert, avoiding the formed workpiece from being jammed during the demolding process. Finally, the formed workpiece in the cavity is pushed down, and the whole can avoid jamming during the forming process and the demolding process. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only those of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall structure of the utility model from top view;

[0020] Figure 3 For this utility model Figure 2 Schematic diagram of the cross-sectional structure of NN;

[0021] Figure 4 It is a structural schematic diagram of the upper mold core and the lower mold core of the utility model;

[0022] Figure 5 It is a schematic cross-sectional structure diagram of the connection block and the ejector plate of the utility model;

[0023] Figure 6 This is a structural diagram of the connection between the inclined ejector rod and the I-shaped block of the utility model;

[0024] Figure 7 This is a structural diagram of the connection between the fixed seat and the inclined ejector rod of the utility model.

[0025] The markings in the figure are: 1. Fixed mold plate; 2. Fixed mold; 3. Moving mold; 4. Cushion block; 5. Moving mold plate; 6. Injection port; 7. Upper mold core; 8. Lower mold core; 9. Spring column; 10. Ejector plate; 11. Anti-stuck structure; 12. Support vertical rod; 13. Slanted ejector rod; 14. I-block; 15. Connecting block; 16. Fixed seat; 17. Fastening bolt; 18. Slot; 19. Through hole; 20. Cavity; 21. Guide column; 22. Slanted hole channel; 23. Elastic oblique block; 24. Snap-in groove. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0027] As Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, an injection mold with an inclined top anti-stuck structure includes a fixed mold 2 and a movable mold 3 assembled under the fixed mold 2, an upper mold core 7 is provided in the fixed mold 2, a lower mold core 8 is provided in the movable mold 3, a plurality of cavities 20 are provided between the upper mold core 7 and the lower mold core 8, and an injection port 6 connected to the cavity 20 is provided on the fixed mold plate 1;

[0028] A fixed mold plate 1 is fixedly installed on the fixed mold 2. A spacer block 4 is fixedly installed at the bottom of the moving mold 3. The bottom end of the spacer block 4 is fixedly installed with a moving mold plate 5. A spring post 9 is fixedly installed on the moving mold plate 5. A thimble plate 10 is sleeved outside the spring post 9. The top end of the spring post 9 is inserted into the moving mold 3. An anti-jamming structure 11 is arranged between the thimble plate 10 and the lower mold core 8;

[0029] The anti-jamming structure 11 includes a through hole 19 opened inside the lower mold core 8. An inclined ejector rod 13 is inserted into the through hole 19. An I-shaped block 14 is rotatably installed at the bottom end of the inclined ejector rod 13. A fixed seat 16 is sleeved outside the inclined ejector rod 13. A connecting block 15 is slidably installed at the bottom end of the I-shaped block 14. The connecting block 15 is fixedly installed on the thimble plate 10;

[0030] A slot 18 for the inclined ejector rod 13 to pass through is opened inside the moving mold 3. The connecting block 15 is clamped inside the slot 18. An inclined hole passage 22 is opened inside the connecting block 15. Elastic inclined blocks 23 are slidably installed on both sides of the inner wall of the inclined hole passage 22. The elastic inclined blocks 23 are in contact with the inclined ejector rod 13.

[0031] In this embodiment, when the injection plastic flows to the cavity 20, during the injection process, due to the pressure generated during the injection of the injection plastic, after the lower mold core 8 in the cavity 20 is pressed, the anti-jamming structure 11 is used to make there be a deformable range in the cavity 20, avoiding the formed workpiece in the cavity 20 from being directly jammed after molding;

[0032] When the workpiece is molded, the injection molding machine is used to drive the moving mold 3 to move downward to open the moving mold 3 and the fixed mold 2. After the upper mold core 7 and the lower mold core 8 are opened, the anti-jamming structure 11 is used to make the inclined ejector rod 13 demold the workpiece in the cavity 20 from the lower mold core 8, avoiding the formed workpiece from being jammed during the demolding process. Finally, the formed workpiece in the cavity 20 is pushed down, and the whole can avoid jamming during the forming process and the demolding process.

[0033] As an embodiment, as Figure 3 shown, the anti-jamming structures 11 are symmetrically arranged with the center of the cavity 20 as the reference, and an eight-shaped structure is formed between adjacent anti-jamming structures 11.

[0034] In this embodiment, since the eight-shaped anti-jamming structure 11 is inserted into the lower mold core 8, the workpiece in the cavity 20 is supported. When demolding, the eight-shaped structure can be smoother, reducing the opening and closing resistance of the mold.

[0035] As an embodiment, as Figure 3 、 Figure 4 and Figure 6 shown, a clamping groove 24 communicating with the cavity 20 is opened on one side of the inclined ejector rod 13. At least four groups of inclined ejector rods 13 are provided.

[0036] In this embodiment, multiple groups of inclined ejector rods 13 are distributed around the interior of the cavity 20 to provide better support stability. At the same time, the clamping groove 24 is connected to the cavity 20. After the workpiece inside the cavity 20 is injection molded, the clamping groove 24 is used to form the workpiece, and the workpiece is demolded during the movement of the inclined ejector rods 13, reducing the difficulty of demolding.

[0037] As an implementation method, Figure 3 and Figure 7 As shown, the connection block 15 and the ejector plate 10 , and the slot 18 and the fixing seat 16 are all connected by fastening bolts 17 , and the width of the connection block 15 is greater than the width of the I-shaped block 14 .

[0038] In this embodiment, the width of the connecting block 15 is utilized. When the inclined push rod 13 is compressed, it is offset inside the fixing seat 16. Through the combination of the inclined hole channel 22 and the elastic inclined block 23, the inclined push rod 13 is resisted. At the same time, the bottom end of the inclined push rod 13 is offset at an angle inside the I-block 14, so that the I-block 14 slides inside the connecting block 15, and there is a deformable range.

[0039] As an implementation method, Figure 4 and Figure 5 As shown, a plurality of groups of supporting uprights 12 are installed between the lower mold core 8 and the ejector plate 10 , and the supporting uprights 12 are distributed around the cavity 20 .

[0040] In this embodiment, the workpiece on the lower mold core 8 is supported simultaneously by the support vertical rod 12 and the inclined ejector rod 13. The support vertical rod 12 vertically penetrates the movable mold 3. When the ejector plate 10 is upward, the support vertical rod 12 and the inclined ejector rod 13 act simultaneously to push it down.

[0041] As an implementation mode, a plurality of guide pillars 21 are installed on the cushion block 4 , and the guide pillars 21 penetrate the fixed mold 2 and the movable mold 3 . When the movable mold 3 moves, it moves along the guide pillars 21 , thereby ensuring demolding of the movable mold 3 and the fixed mold 2 .

[0042] As an implementation method, Figure 3 and Figure 6 As shown, a rotation groove for accommodating the end of the inclined ejector rod 13 is opened on the top of the I-shaped block 14, and the opening angle of the rotation groove is greater than the angle of the end of the inclined ejector rod 13.

[0043] In this embodiment, the angle of the I-block 14 groove is greater than the angle of the inclined ejector rod 13. The bottom end of the inclined ejector rod 13 is offset in the I-block 14 at an angle such that the I-block 14 slides in the connecting block 15 and has a deformable range, thereby preventing the inclined ejector rod 13 from getting stuck inside the movable mold 3.

[0044] Working principle: When in use, the movable mold 3 is driven upward by the injection molding machine to close the movable mold 3 and the fixed mold 2, and the upper mold core 7 and the lower mold core 8 are closed, and then connected with the cavity 20 through the injection port 6, and the injection plastic flows to the cavity 20. During the injection process, due to the pressure generated during the injection of the injection plastic, the lower mold core 8 in the cavity 20 is compressed. Due to the support of the supporting vertical rod 12 and the inclined ejector rod 13, the inclined ejector rod 13 is compressed and deviates inside the fixed seat 16. Through the combination of the inclined hole channel 22 and the elastic inclined block 23, the inclined ejector rod 13 is resisted. At the same time, the bottom end of the inclined ejector rod 13 is at an offset angle in the I-shaped block 14, so that the I-shaped block 14 slides in the connecting block 15. There is a deformable range to prevent the molded workpiece in the cavity 20 from being directly stuck after molding;

[0045] After the workpiece is formed, the movable mold 3 is driven downward by the injection molding machine to open the movable mold 3 and the fixed mold 2. After the upper mold core 7 and the lower mold core 8 are opened, since the clamping groove 24 in the inclined ejector rod 13 is connected with the cavity 20, the workpiece and the lower mold core 8 of the movable mold 3 move downward together. When the injection molding machine drives the ejector plate 10 to move upward again, the ejector plate 10 moves along the spring column 9. At this time, the connecting block 15 and the I-shaped block 14 on the ejector plate 10 drive the inclined ejector rod 13 to move upward. Due to the eight-shaped inclined ejector rod 13 and the inclined ejector rod 13 upward, it deviates inside the fixed seat 16. Under the combination of the inclined hole channel 22 and the elastic inclined block 23, the force angle changes, so that the inclined ejector rod 13 and the supporting vertical rod 12 act at the same time to demold the workpiece and the lower mold core 8 in the cavity 20, so as to avoid the molded workpiece from getting stuck during demolding. Finally, the molded workpiece in the cavity 20 is pushed down, which can avoid getting stuck during the molding process and during demolding.

[0046] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0047] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. An injection mold with an anti-jamming structure for inclined ejectors, comprising a fixed mold (2) and a movable mold (3) assembled under the fixed mold (2). An upper mold core (7) is provided in the fixed mold (2), and a lower mold core (8) is provided in the movable mold (3). A plurality of cavities (20) are formed between the upper mold core (7) and the lower mold core (8). A fixed template (1) is fixedly installed on the fixed mold (2), and an injection port (6) communicating with the cavities (20) is formed on the fixed template (1). A spacer block (4) is fixedly installed at the bottom of the moving mold (3), and a moving template (5) is fixedly installed at the bottom end of the spacer block (4). It is characterized in that, A spring column (9) is fixedly installed on the movable template (5), and a thimble plate (10) is sleeved outside the spring column (9). The top end of the spring column (9) is inserted into the movable mold (3), and an anti-jamming structure (11) is arranged between the thimble plate (10) and the lower mold core (8). The anti-jamming structure (11) includes a through hole (19) formed inside the lower mold core (8). An inclined ejector rod (13) is inserted into the through hole (19). An I-shaped block (14) is rotatably installed at the bottom end of the inclined ejector rod (13), and a fixed seat (16) is sleeved outside the inclined ejector rod (13). A connecting block (15) is slidably installed at the bottom end of the I-shaped block (14), and the connecting block (15) is fixedly installed on the thimble plate (10). A slot (18) for the inclined ejector rod (13) to pass through is formed inside the movable mold (3). The connecting block (15) is clamped inside the slot (18). An inclined hole channel (22) is formed inside the connecting block (15), and elastic inclined blocks (23) are slidably installed on both sides of the inner wall of the inclined hole channel (22). The elastic inclined blocks (23) are in contact with the inclined ejector rod (13).

2. The injection mold with an inclined ejector anti-jamming structure according to claim 1, characterized in that, The anti-jamming structures (11) are symmetrically arranged with the center of the cavity (20) as the reference, and an eight-shaped structure is formed between adjacent anti-jamming structures (11).

3. The injection mold with a slant lifter anti-jamming structure according to claim 1, wherein, A clamping groove (24) communicating with the cavity (20) is formed on one side of the inclined ejector rod (13), and at least four groups of inclined ejector rods (13) are provided.

4. An injection mold with an inclined ejector anti-jamming structure according to claim 1, characterized in that, The connecting block (15) and the thimble plate (10), and the slot (18) and the fixed seat (16) are connected by fastening bolts (17). The width of the connecting block (15) is greater than the width of the I-shaped block (14).

5. The injection mold with an inclined ejector anti-jamming structure according to claim 1, characterized in that, A plurality of support vertical rods (12) are installed between the lower mold core (8) and the thimble plate (10), and the support vertical rods (12) are distributed around the cavity (20).

6. The injection mold with an inclined ejector anti-jamming structure according to claim 1, characterized in that, A rotating groove for accommodating the end of the inclined ejector rod (13) is formed at the top of the I-shaped block (14), and the opening angle of the rotating groove is greater than the angle of the end of the inclined ejector rod (13).

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