An injection mold with easy demolding

Abstract

The application relates to an injection mold easy to demold, belonging to the mold manufacturing field, which comprises a mounting top plate, an upper mold, a lower mold and a mounting bottom plate, the mounting top plate is provided with a flow channel opening; the lower mold comprises a forming block protruding towards the upper mold, a sliding block circumferentially arranged on the forming block, a fixing seat fixedly connected with the mounting bottom plate, a sliding seat for mounting the forming block and the sliding block, and a ejector plate slidingly mounted between the fixing seat and the mounting bottom plate, the upper mold is provided with a forming groove for arranging the forming block, and the upper mold and the lower mold have a forming chamber, the lower mold is provided with a demolding driving mechanism for connecting the sliding seat and the ejector plate and driving the sliding seat to slide, and the sliding seat has an ejection surface abutting with the forming block. The application has the effect of improving the demolding quality of the cylindrical forming product.

Description

Technical Field

[0001] This application relates to the field of mold making, and in particular to an injection mold that is easy to demold. Background Technology

[0002] Injection molds play a crucial role in many industries, such as plastic products and rubber products, enabling efficient and precise product molding, which greatly improves production efficiency and product quality.

[0003] Traditional injection mold operating mechanisms operate according to the rules of mechanical mechanisms. Its mold opening process consists of a movable molding core, a latch, an opener / closer, a countersunk plate, and a limit screw. When the mold opening action begins, the latch pulls open the countersunk plate, the countersunk plate pulls open the movable molding core, the countersunk plate pulls open the limit screw, the limit screw pulls open the opener / closer, and the opener / closer pulls open the upper fixed plate, ultimately completing the demolding and ejection process. However, when the above injection mold operating mechanism encounters a cylindrical product, the high clamping force generated by the cylindrical product within the molding cavity makes it difficult for the cylindrical product to eject, leading to surface damage or deformation and affecting product quality.

[0004] In response to the aforementioned technologies, the inventor provides an injection mold that is easy to demold. Utility Model Content

[0005] In order to improve the demolding quality of cylindrical molded products, this application provides an injection mold that is easy to demold.

[0006] The injection mold for easy demolding provided in this application adopts the following technical solution: An easy-to-demold injection mold includes a mounting top plate, an upper mold mounted on the bottom surface of the mounting top plate, a lower mold cooperating with the upper mold, and a mounting base plate mounted on the side of the lower mold facing away from the upper mold. The mounting top plate has a runner opening. The lower mold includes a molding block protruding towards the upper mold, a sliding block circumferentially arranged on the molding block, a fixed seat fixedly connected to the mounting base plate, a sliding seat mounted on the top surface of the fixed seat for mounting the molding block and the sliding block, and an ejector plate slidably mounted between the fixed seat and the mounting base plate. The upper mold has a molding groove for arranging the molding block, and a molding cavity is formed between the upper mold and the lower mold. The lower mold is provided with a demolding drive mechanism for connecting the sliding seat and the ejector plate and for driving the sliding seat to slide. The sliding seat has an ejector surface for demolding.

[0007] By adopting the above technical solution, during the use of injection molds, the top plate is opened with a runner for material injection. The upper and lower molds cooperate to form a molding chamber for injection molding, forming a molded product. The molding block and molding groove cooperate to determine the product shape. The sliding block is arranged circumferentially around the molding block to assist in molding. When it is necessary to demold the molded product, the demolding drive mechanism drives the sliding seat to rise. Through the setting of the ejector surface, the molded product in the molding chamber is ejected to facilitate demolding and effectively improve the demolding quality of the molded product.

[0008] Optionally, the demolding drive mechanism includes a demolding trigger connecting the sliding seat and the ejector plate, a sliding drive component for driving the ejector plate to slide, and a demolding assembly installed at the sliding seat and engaging with the demolding trigger to drive the sliding seat to slide. The sliding seat has a mounting groove on the side connected to the demolding trigger for arranging the demolding assembly.

[0009] By adopting the above technical solution, the specific structure of the demolding drive mechanism is disclosed. The demolding trigger is connected to the sliding seat and the ejector plate. When the sliding drive component drives the ejector plate to slide, the power is transmitted to the demolding assembly through the demolding trigger. The demolding assembly drives the sliding seat to slide, thereby allowing the molded block to protrude. The demolding assembly is installed on the sliding seat and set in the mounting groove, which helps to limit the sliding of the demolding trigger and ensure the stability and accuracy of the demolding drive mechanism.

[0010] Optionally, the demolding assembly includes an abutment block slidably mounted in the mounting groove, a limiting spring for driving the abutment block to always have a drive to disengage from the mounting groove, and a limiting bolt for limiting the abutment block to disengage from the mounting groove. The abutment block has a waist-shaped groove for arranging the limiting bolt, and the abutment block has a first limiting surface that abuts and engages with the demolding trigger.

[0011] By adopting the above technical solution, the specific structure of the demolding component is disclosed. During the limiting process, the abutment block is always driven by the limiting spring to have a tendency to disengage from the mounting groove, so that the abutment block can abut against the demolding trigger through the first limiting surface to limit the sliding of the demolding trigger. In order to restrict the abutment block from disengaging from the mounting groove, a waist-shaped groove is provided on the abutment block for the arrangement of the limiting bolt, so as to ensure that the demolding process is stable and orderly.

[0012] Optionally, the mounting base plate is provided with a limiting rod for driving the abutment block to return to the mounting groove. The extending direction of the limiting rod is the same as the sliding direction of the sliding seat. The abutment block has a guide slope on the side facing away from the lower mold. The guide slope extends downward away from the upper mold. The limiting rod is used for the limiting groove where the abutment block is arranged, and the limiting rod has an abutment surface at the limiting groove that abuts and cooperates with the abutment block.

[0013] By adopting the above technical solution, the demolding trigger and the abutment block abut against each other and drive the sliding seat to slide. When the guide slope of the abutment block abuts against the abutment surface of the limit rod and continuously drives the abutment block to drive the sliding seat to slide, the limit rod drives the abutment block to return to the mounting groove, so that the demolding trigger cannot drive the sliding seat to slide, reducing the occurrence of excessive sliding of the sliding seat and ensuring the stability of the demolding process.

[0014] Optionally, the demolding trigger has an arrangement slot for arranging the limiting rod, and the demolding trigger slides along the extension direction of the limiting rod.

[0015] By adopting the above technical solution, by opening a groove on the demolding trigger for arranging the limiting rod and allowing the demolding trigger to slide along the extension direction of the limiting rod, the sliding of the demolding trigger can be guided, ensuring the stability and accuracy of the demolding trigger's sliding. This enables the demolding drive mechanism to drive the sliding seat to slide more stably, thereby achieving stable demolding of the molded product.

[0016] Optionally, the fixed base has a fixed plate arranged at the bottom of the sliding base. The fixed plate and the sliding base are engaged by a guide structure. The guide structure includes a guide bolt fixedly connected to the sliding base at one end, a fixed groove formed in the fixed plate, and a guide sleeve installed in the fixed groove and used to engage with the guide bolt. The guide sleeve has a second limiting surface for abutting and engaging with the guide bolt.

[0017] By adopting the above technical solution, the fixed plate and the sliding seat can guide the sliding process of the sliding seat through the cooperation between the guide bolt, the fixed groove and the sliding sleeve, so that the sliding seat can slide stably on the fixed plate. The setting of the second limiting surface can limit the movement range of the guide bolt in the guide sleeve, thereby limiting the sliding of the sliding seat and further ensuring the accuracy and stability of the sliding of the sliding seat.

[0018] Optionally, the sliding block is provided with a guide rod, one end of which is fixed to the upper mold and the other end is inserted into the sliding block. The sliding block has an insertion slot for arranging the guide rod.

[0019] By adopting the above technical solution, the guide bar is fixed at one end to the upper mold and the other end is connected to the sliding block through the insertion groove. This allows the sliding block to slide stably along the guide bar during the opening and closing of the upper and lower molds, thereby enabling the circumferential separation of the molding block from the sliding block and improving the demolding efficiency.

[0020] Optionally, the bottom surface of the sliding block is provided with a guide groove, and the top surface of the sliding seat has a guide protrusion that cooperates with the guide groove.

[0021] By adopting the above technical solution, the guide protrusion on the top surface of the sliding seat and the guide groove on the bottom surface of the sliding block can cooperate to provide accurate guidance for the movement of the sliding block, making the movement of the sliding block more stable and precise, and ensuring the smooth progress of the demolding process.

[0022] Optionally, a dust cover is also hinged to one side of the ejector plate, and the dust cover is arranged opposite to the demolding drive mechanism on both sides of the ejector plate.

[0023] By adopting the above technical solution, a dust cover plate is hinged to one side of the ejector plate and arranged opposite to the demolding drive mechanism, which can prevent dust from entering the area where the ejector plate and the demolding drive mechanism are located, and ensure the normal operation of the structure.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. An easy-to-demold injection mold, wherein during the use of the injection mold, an upper plate is installed with a runner for injecting material, an upper mold and a lower mold cooperate to form a molding chamber for injection molding to form a molded product, a molding block and a molding groove cooperate to determine the product shape, and a sliding block is arranged circumferentially around the molding block to assist in molding. When it is necessary to demold the molded product, the demolding drive mechanism drives the sliding block to rise, and through the setting of the ejector surface, it is used to eject the molded product in the molding chamber to facilitate the demolding of the molded product, effectively improving the demolding quality of the molded product; 2. By setting the demolding component, during the limiting process, the limiting spring drives the abutment block to always have a tendency to disengage from the mounting groove, so that the abutment block can abut against the demolding trigger through the first limiting surface to limit the sliding of the demolding trigger. In order to limit the abutment block from disengaging from the mounting groove, a waist-shaped groove is provided on the abutment block for the arrangement of the limiting bolt, so as to ensure that the demolding process is stable and orderly. 3. By setting the guide bar, the sliding block can slide stably along the guide bar during the opening and closing of the upper and lower molds, thereby enabling the circumferential separation of the molding block from the sliding block and improving the demolding efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of an injection mold that is easy to demold in the embodiments of this application.

[0026] Figure 2 This is a cross-sectional schematic diagram of an injection mold that is easy to demold, as described in the embodiments of this application.

[0027] Figure 3 This is a schematic diagram of the structure of the upper mold and the lower mold in the embodiment of this application.

[0028] Figure 4 yes Figure 2 A magnified view of a portion of point A in the middle.

[0029] Figure 5 This is a schematic diagram of the demolding drive component in an embodiment of this application.

[0030] Figure 6 This is a schematic diagram of the structure of the demolding trigger and the limiting rod in the embodiment of this application.

[0031] Figure 7 This is an example from the embodiments of this application.

[0032] Figure 8 yes Figure 3 A magnified view of a portion of point B in the middle.

[0033] Figure 9 This is a schematic diagram of the structure of the dust cover plate and the lower mold in the embodiment of this application.

[0034] Explanation of reference numerals in the attached drawings: 1. Mounting top plate; 11. Runner opening; 2. Upper mold; 21. Molding groove; 22. Gating system; 23. Control system; 3. Lower mold; 31. Molding block; 32. Fixing seat; 321. Fixing plate; 3211. Fixing groove; 3212. Guide sleeve; 32121. Second limiting surface; 33. Sliding seat; 331. Ejector surface; 332. Mounting groove; 333. Guide bolt; 334. Guide protrusion; 34. Ejector plate; 35. Sliding... 351. Guide slant bar; 352. Insertion groove; 353. Guide groove; 36. Dustproof cover; 4. Mounting base plate; 41. Limiting rod; 411. Abutting surface; 412. Limiting groove; 5. Molding chamber; 6. Demolding drive mechanism; 61. Demolding trigger; 611. Arrangement groove; 63. Demolding assembly; 631. Abutting block; 6311. Waist-shaped groove; 6312. First limiting surface; 6313. Guide slant surface; 632. Limiting spring; 633. Limiting bolt. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0036] This application discloses an injection mold that is easy to demold. (Refer to...) Figure 1An easy-to-demold injection mold includes a mounting top plate 1, an upper mold 2 mounted on the bottom surface of the mounting top plate 1, a lower mold 3 that mates with the upper mold 2, and a mounting base plate 4 mounted on the side of the lower mold 3 facing away from the upper mold 2. The mounting top plate 1 has a runner opening 11 that connects to the nozzle of the injection molding machine.

[0037] Reference Figure 2 and Figure 3 The lower mold 3 includes a molding block 31 protruding towards the upper mold 2, a sliding block 35 circumferentially arranged on the molding block 31, a fixed seat 32 fixedly connected to the mounting base plate 4, a sliding seat 33 mounted on the top surface of the fixed seat 32 for mounting the molding block 31, and an ejector plate 34 slidably mounted between the fixed seat 32 and the mounting base plate 4. The upper mold 2 has a molding groove 21 on the side facing the lower mold 3 for arranging the molding block 31. When the bottom surface of the upper mold 2 is in contact with the top surface of the lower mold 3, a molding chamber 5 is formed between the upper mold 2 and the lower mold 3. The upper mold 2 is provided with a gating system 22 connecting the runner 11 and the molding chamber 5, and a control system 23 for controlling the mold temperature. Molten plastic is injected from the injection molding machine into the runner 11, transported to the molding chamber 5 through the gating system 22, and the mold temperature is reduced by the control system 23 to rapidly cool the mold, allowing the molded product to solidify in the molding chamber 5.

[0038] Reference Figure 2 and Figure 4 To facilitate demolding of the molded product, the lower mold 3 is equipped with a demolding drive mechanism 6 for driving the sliding seat 33 to slide and eject the molded product from the molding chamber 5. The sliding seat 33 has an ejector surface 331 for demolding. The demolding drive mechanism 6 connects the sliding seat 33 and the ejector plate 34. The demolding drive mechanism 6 includes a demolding trigger 61 connecting the sliding seat 33 and the ejector plate 34, a sliding drive component for driving the ejector plate 34, and a demolding assembly 63 installed on the sliding seat 33 and engaging with the demolding trigger 61 to drive the sliding seat 33 to slide. The sliding seat 33 has a mounting groove 332 on the side connected to the demolding trigger 61 for arranging the demolding assembly 63. In this application, the sliding drive component is a hydraulic cylinder.

[0039] Reference Figure 5 and Figure 6The demolding assembly 63 includes an abutment block 631 slidably mounted in the mounting groove 332, a limiting spring 632 for driving the abutment block 631 to always tend to disengage from the mounting groove 332, and a limiting bolt 633 for limiting the abutment block 631 from disengaging from the mounting groove 332. The abutment block 631 has a waist-shaped groove 6311 for accommodating the limiting bolt 633, and a first limiting surface 6312 that abuts against the top surface of the demolding trigger 61. To prevent excessive sliding of the sliding seat 33, the mounting base plate 4 is also provided with a limiting rod 41 for driving the abutment block 631 back to the mounting groove 332, the extending direction of the limiting rod 41 being consistent with the sliding direction of the sliding seat 33. The abutment block 631 has a guide slope 6313 on the side facing away from the demolding trigger 61. The guide slope 6313 extends downward away from the upper mold 2. The limiting rod 41 has a limiting groove 412 for accommodating the abutment block 631, and the limiting rod 41 has an abutment surface 411 at the limiting groove 412 that abuts against the abutment block 631. When the demolding drive mechanism 6 drives the sliding seat 33 to slide continuously, the abutment block 631 is continuously pressed back into the mounting groove 332 by the cooperation between the guide slope 6313 of the abutment block 631 and the abutment surface 411 of the limiting rod 41. This prevents the sliding of the demolding trigger 61 from driving the sliding of the sliding seat 33, thus stopping the sliding process of the sliding seat 33. In order to guide the sliding of the demolding trigger 61, the demolding trigger 61 is provided with an arrangement slot 611 for arranging the limit rod 41, so that the demolding trigger 61 can slide along the extension direction of the limit rod 41.

[0040] Reference Figure 7 The fixed base 32 has a fixed plate 321 disposed at the bottom of the sliding base 33, and the fixed plate 321 and the sliding base 33 are engaged by a guide structure. The guide structure includes a guide bolt 333 fixedly connected to the sliding base 33 at one end, a fixed groove 3211 formed in the fixed plate 321, and a guide sleeve 3212 installed in the fixed groove 3211 for engaging with the guide bolt 333. The fixed plate 321 has a second limiting surface 32121 in the guide sleeve 3212 for abutting with the guide bolt 333. The sliding of the guide bolt 333 within the guide sleeve 3212 provides guidance for the sliding of the sliding base 33.

[0041] Reference Figure 2 and Figure 8To facilitate the sliding of the sliding block 35 on the top surface of the sliding seat 33, allowing the forming block 31 to protrude, the sliding block 35 is provided with a guide rod 351. One end of the guide rod 351 is fixed to the upper mold 2, and the other end is inserted into the sliding block 35. The sliding block 35 has an insertion slot 352 for the guide rod 351, which is inclined downwards away from the forming block 31. When the demolding drive assembly pushes the sliding seat 33 towards the upper mold 2, the guide rod 351 drives the sliding block 35 to slide away from the forming block 31. To guide the sliding process of the sliding block 35, a guide groove 353 is provided on the bottom surface of the sliding block 35, and the top surface of the sliding seat 33 has a guide protrusion 334 that engages with the guide groove 353 of the sliding block 35.

[0042] Reference Figure 2 and Figure 9 In order to reduce the probability of dust entering the injection mold during use, a dust cover plate 36 is also hinged to one side of the ejector plate 34, and the dust cover plate 36 and the demolding drive assembly are arranged opposite to each other on both sides of the ejector plate 34.

[0043] The implementation principle of an easy-to-demold injection mold according to an embodiment of this application is as follows: During the demolding process of the molded product, the ejector plate 34 is first driven to slide upward towards the mold 2 by the sliding drive component, and the demolding trigger 61 pushes the sliding block 631 to slide, thereby driving the sliding seat 33 to slide. Due to the setting of the ejector surface 331 on the sliding seat 33, the sliding seat 33 can drive the molded product in the molding chamber 5 to be ejected from the molding block 31 during the sliding process. With the presence of the guide rod 351, the sliding block 35 slides away from the molding block 31 during the sliding of the sliding seat 33 upward towards the mold 2, so that the molding block 31 protrudes, thereby facilitating the demolding of the molded product on the molding block 31 and improving the demolding quality of the molded product.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An injection mold that is easy to demold, characterized in that, The system includes a mounting top plate (1), an upper mold (2) mounted on the bottom surface of the mounting top plate (1), a lower mold (3) cooperating with the upper mold (2), and a mounting base plate (4) mounted on the side of the lower mold (3) facing away from the upper mold (2). The mounting top plate (1) has a flow channel opening (11). The lower mold (3) includes a forming block (31) protruding towards the upper mold (2), a sliding block (35) circumferentially arranged on the forming block (31), a fixing seat (32) fixedly connected to the mounting base plate (4), and a mounting base (35) mounted on the top surface of the fixing seat (32) for supplying the forming block (31). 1) A sliding seat (33) installed with the sliding block (35) and an ejector plate (34) slidably installed between the fixed seat (32) and the mounting base plate (4). The upper mold (2) has a forming groove (21) for arranging the forming block (31) and a forming cavity (5) between the upper mold (2) and the lower mold (3). The lower mold (3) is provided with a demolding drive mechanism (6) for connecting the sliding seat (33) and the ejector plate (34) and for driving the sliding seat (33) to slide. The sliding seat (33) has an ejector surface (331) for demolding.

2. The injection mold for easy demolding according to claim 1, characterized in that, The demolding drive mechanism (6) includes a demolding trigger (61) connecting the sliding seat (33) and the ejector plate (34), a sliding drive component for driving the ejector plate (34) to slide, and a demolding assembly (63) installed on the sliding seat (33) and abutting against the demolding trigger (61) to drive the sliding seat (33) to slide. The sliding seat (33) has a mounting groove (332) on the side connected to the demolding trigger (61) for arranging the demolding assembly (63).

3. The injection mold for easy demolding according to claim 2, characterized in that, The demolding assembly (63) includes an abutment block (631) slidably mounted in the mounting groove (332), a limiting spring (632) for driving the abutment block (631) to always have a drive to disengage from the mounting groove (332), and a limiting bolt (633) for limiting the abutment block (631) from disengaging from the mounting groove (332). The abutment block (631) has an oblong groove (6311) for arranging the limiting bolt (633), and the abutment block (631) has a first limiting surface (6312) that abuts against the demolding trigger (61).

4. The injection mold for easy demolding according to claim 3, characterized in that, The mounting base plate (4) is provided with a limiting rod (41) for driving the abutment block (631) back to the mounting groove (332). The extension direction of the limiting rod (41) is the same as the sliding direction of the sliding seat (33). The abutment block (631) has a guide slope (6313) on the side facing away from the lower mold (3). The guide slope (6313) extends downward away from the upper mold (2). The limiting rod (41) is used for the limiting groove (412) for the abutment block (631) to be arranged, and the limiting rod (41) has an abutment surface (411) at the limiting groove (412) that abuts and cooperates with the abutment block (631).

5. The injection mold for easy demolding according to claim 4, characterized in that, The demolding trigger (61) has an arrangement slot (611) for arranging the limiting rod (41), and the demolding trigger (61) slides along the extension direction of the limiting rod (41).

6. The injection mold for easy demolding according to claim 1, characterized in that, The fixed base (32) has a fixed plate (321) arranged at the bottom of the sliding base (33). The fixed plate (321) and the sliding base (33) are engaged by a guide structure. The guide structure includes a guide bolt (333) fixedly connected to the sliding base (33) at one end, a fixed groove (3211) opened in the fixed plate (321), and a guide sleeve (3212) installed in the fixed groove (3211) and used to engage with the guide bolt (333). The guide sleeve (3212) has a second limiting surface (32121) for abutting with the guide bolt (333).

7. The injection mold for easy demolding according to claim 6, characterized in that, The sliding block (35) is provided with a guide rod (351). One end of the guide rod (351) is fixed to the upper mold (2) and the other end is inserted into the sliding block (35). The sliding block (35) is provided with an insertion slot (352) for the guide rod (351) to be arranged.

8. The injection mold for easy demolding according to claim 7, characterized in that, The bottom surface of the sliding block (35) is provided with a guide groove (353), and the top surface of the sliding seat (33) has a guide protrusion (334) that cooperates with the guide groove (353).

9. The injection mold for easy demolding according to claim 1, characterized in that, A dust cover (36) is also hinged to one side of the ejector plate (34), and the dust cover (36) and the demolding drive mechanism (6) are arranged opposite to each other on both sides of the ejector plate (34).

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