Injection mold for special-shaped parts

Abstract

The utility model relates to injection mold technical field discloses a special-shaped part injection mold, including lower die holder, the lower die holder inside is equipped with lower mould, the first dovetail groove is opened to the symmetry of lower mould bottom wall, the second dovetail groove is opened to the symmetry of lower mould side wall, the cooling cavity is opened to the inside of lower mould side wall, the water inlet and water outlet of cooling cavity all fixed sleeve joint has the sleeve pipe, the lower die holder includes quick release mechanism convenient for replacing mould, the installation groove is opened to the centre of lower die holder top, and the lower mould is inlayed in the inner wall of installation groove, the utility model discloses through the design of quick release mechanism, when maintaining or replacing lower mould, pushes round plate compression spring, and the rotary disengagement of cooperation block and card slot, to realize the quick unlocking of symmetrical bolt, and further realize the purpose that can quickly install and disassemble lower mould, make the operation step simple, and one person can complete disassembly, improve the maintenance efficiency, reduce the maintenance time.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold for irregularly shaped parts. Background Technology

[0002] Injection molds for irregularly shaped parts are specialized process equipment used to mold irregularly shaped plastic products. Their core function is to fill the mold cavity with molten plastic raw material through the "injection molding" process, and after cooling and solidification, form irregularly shaped plastic parts with specific shapes and sizes.

[0003] Patent CN222022141U discloses an injection mold for precision machining of parts, relating to the field of injection mold technology. It includes an operating table with a lower mold fixedly connected to its top surface. The lower mold has a shaped opening on its left side. Transition pipes are provided on both the left and right sides of the lower mold. A water pump is fixedly connected to the left end of the transition pipe on the left side via a connecting flange, and a connecting pipe is fixedly connected to the right end of the transition pipe on the right side via a connecting flange. Flow cavities are provided on both the left and right sides inside the operating table, and a cooling cavity is provided on one side of the inner wall of both flow cavities. A cooling device is provided on the bottom surface of the operating table. This invention can quickly cool the lower mold, avoiding the long cooling time required for parts removal in traditional injection molds, thus reducing mold cooling time and improving the efficiency of parts manufacturing.

[0004] The aforementioned patent has issues with the disassembly and assembly of the lower mold during use. It is complex and time-consuming, making it difficult to quickly replace and maintain the lower mold. In addition, the cooling pipes are highly integrated with the mold, and the water system needs to be disassembled simultaneously during replacement, which increases the maintenance difficulty. Based on this, a special injection mold for irregular parts is proposed for improvement. Utility Model Content

[0005] In view of the above-mentioned problems of difficulty in quickly replacing and maintaining the lower mold and the need to disassemble the water system at the same time during replacement, this utility model is proposed.

[0006] To solve the above technical problems, this utility model provides the following technical solution: an injection mold for irregularly shaped parts, including a lower mold base, a lower mold is provided inside the lower mold base, a first dovetail groove is symmetrically opened on the bottom wall of the lower mold, a second dovetail groove is symmetrically opened on the side wall of the lower mold, a cooling cavity is opened inside the side wall of the lower mold, and a sleeve is fixedly connected to the inlet and outlet of the cooling cavity; the lower mold base includes a quick-release mechanism for easy mold replacement.

[0007] An installation groove is provided at the center of the top of the lower mold base. The lower mold is fitted into the inner wall of the installation groove. Several vertical dovetail blocks are symmetrically arranged on the side wall of the installation groove. Several vertical dovetail blocks are fitted into the inner wall of the second dovetail groove. A pin groove is provided on the bottom wall of the installation groove. Symmetrical pins are slidably connected to the inner wall of the pin groove. The upper part of the symmetrical pin is fitted into the inner wall of the first dovetail groove.

[0008] As a preferred embodiment, the lower mold base has a sliding groove on one side, and the inner wall of the sliding groove has a circular groove and a retaining groove respectively. A sliding rod is slidably connected inside the symmetrical pin push plate. A retaining block is fixedly connected to one end of the sliding rod. The retaining block is slidably connected to the inner wall of the sliding groove and rotatably connected to the inner wall of the circular groove. The retaining block is fitted into the inner wall of the retaining groove. A circular plate is fixedly connected to the other end of the sliding rod. A spring is sleeved on the outer surface of the sliding rod. One end of the spring is fixedly connected to one side of the circular plate, and the other end of the spring is in contact with one side of the symmetrical pin.

[0009] As a preferred embodiment, the lower mold base includes a cooling mechanism for cooling the mold. A liquid storage chamber and a heat dissipation chamber are respectively provided on both sides of the lower mold base. A water pump is fixedly installed on the bottom wall of the liquid storage chamber. A first liquid delivery pipe is fixedly sleeved at the output end of the water pump. One end of the first liquid delivery pipe extends to the bottom wall of the mounting groove. A sleeve of the cooling chamber inlet is fitted onto the outlet end of the first liquid delivery pipe. A second liquid delivery pipe is fitted onto the inner wall of the sleeve of the cooling chamber outlet. A heat dissipation pipe is fixedly sleeved at one end of the second liquid delivery pipe.

[0010] As a preferred embodiment, the heat dissipation pipe is fixedly installed on the lower part of the inner wall of the heat dissipation cavity. The heat dissipation pipe is S-shaped and has several heat dissipation fins fixedly connected to its surface. A return pipe is fixedly sleeved at one end of the heat dissipation pipe. One end of the return pipe passes through the interior of the lower mold base and extends into the liquid storage cavity. Several fans are fixedly installed in the middle of the inner wall of the heat dissipation cavity. The upper part of the inner wall of the heat dissipation cavity is connected to the outside. The bottom of the heat dissipation cavity passes through the interior of the lower mold base and extends below the lower mold base.

[0011] As a preferred embodiment, an electric push rod is fixedly installed at the center of the bottom end of the lower mold base. The telescopic shaft of the electric push rod passes through the bottom end of the lower mold base and extends into the interior of the lower mold. The telescopic shaft of the electric push rod extending into the interior of the lower mold is fixedly connected to an ejector plate, and the ejector plate is slidably connected to the inner wall of the lower mold.

[0012] As a preferred embodiment, an upper mold base is fixedly installed at the top of the lower mold base, a cylinder is fixedly installed at the center of the top of the upper mold base, the cylinder's telescopic shaft is fixedly connected to an upper mold, the upper mold is positioned directly above the lower mold, and guide rods are fixedly connected to both sides of the top of the upper mold, the guide rods being slidably connected inside the upper mold base.

[0013] As a preferred embodiment, an injection tube is fixedly sleeved inside the upper mold base, a flexible tube is fixedly sleeved at the bottom end of the injection tube, and the bottom end of the flexible tube is fixedly sleeved at the top injection port of the upper mold.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] 1. This utility model, through the design of a quick-release mechanism, pushes the circular plate to compress the spring during maintenance or replacement of the lower mold. This, combined with the rotation of the locking block and the locking slot, enables the symmetrical pins to be quickly unlocked. This allows for the rapid installation and disassembly of the lower mold, simplifying the operation steps. Disassembly can be completed by a single person, improving maintenance efficiency and reducing maintenance time.

[0016] 2. This utility model achieves gapless horizontal positioning by cooperating with the vertical dovetail block and the second dovetail groove, preventing the lower mold from shifting. The lower part of the symmetrical pin is embedded in the pin groove and the upper part is embedded in the first dovetail groove, further locking the mold and preventing vertical loosening. Initial positioning can be completed without additional tools, reducing installation time and improving the reliability of the device.

[0017] 3. Through the design of the cooling mechanism, this utility model enables the circulating coolant to work in conjunction with the S-shaped heat dissipation pipe and fan to quickly cool the lower mold, reducing waste and increasing production capacity. On the other hand, the lower mold is connected to the quick-release mechanism through the sleeve, eliminating the need to disassemble the water pipe when changing molds, reducing maintenance time and improving mold changing efficiency. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present invention;

[0019] Figure 2 This is a front cross-sectional view of the present invention.

[0020] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0021] Figure 4 This is a side sectional view of the present invention.

[0022] Figure 5 for Figure 4 Enlarged structural diagram at point B;

[0023] Figure 6 This is a top view cross-sectional structural diagram of the present invention;

[0024] Figure 7 This is a side view sectional structural diagram of the lower mold in this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Lower mold base; 11. Liquid storage chamber; 12. Heat dissipation chamber; 2. Upper mold base; 21. Cylinder; 22. Guide rod; 23. Injection tube; 24. Hose; 3. Quick release mechanism; 31. Mounting groove; 32. Vertical dovetail block; 33. Pin groove; 34. Slide groove; 35. Circular groove; 36. Slot; 37. Symmetrical pin; 38. Slide rod; 39. Locking block; 310. Circular plate; 311. Spring; 4. Lower mold; 41. First dovetail groove; 42. Second dovetail groove; 43. Cooling chamber; 44. Sleeve; 45. Ejector plate; 5. Upper mold; 6. Cooling mechanism; 61. Water pump; 62. First infusion pipe; 63. Second infusion pipe; 64. Heat dissipation pipe; 65. Heat dissipation fins; 66. Return pipe; 67. Fan; 7. Electric push rod. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Reference Figures 1-7 This is the first embodiment of the present utility model, which provides an injection mold for irregularly shaped parts, including a lower mold base 1, a lower mold 4 inside the lower mold base 1, a first dovetail groove 41 symmetrically opened on the bottom wall of the lower mold 4, a second dovetail groove 42 symmetrically opened on the side wall of the lower mold 4, a cooling cavity 43 opened inside the side wall of the lower mold 4, and a sleeve 44 fixedly connected to the water inlet and water outlet of the cooling cavity 43. The lower mold base 1 includes a quick-release mechanism 3 for easy mold replacement.

[0029] A mounting groove 31 is provided at the center of the top of the lower mold base 1. The lower mold 4 is fitted into the inner wall of the mounting groove 31. Several vertical dovetail blocks 32 are symmetrically arranged on the side wall of the mounting groove 31. Several vertical dovetail blocks 32 are fitted into the inner wall of the second dovetail groove 42. A pin groove 33 is provided on the bottom wall of the mounting groove 31. Symmetrical pins 37 are slidably connected to the inner wall of the pin groove 33. The upper part of the pin of the symmetrical pin 37 is fitted into the inner wall of the first dovetail groove 41.

[0030] A sliding groove 34 is provided on one side of the lower mold base 1. A circular groove 35 and a slot 36 are respectively provided on the inner wall of the sliding groove 34. A sliding rod 38 is slidably connected inside the push plate of the symmetrical pin 37. A locking block 39 is fixedly connected to one end of the sliding rod 38. The locking block 39 is slidably connected to the inner wall of the sliding groove 34. The locking block 39 is rotatably connected to the inner wall of the circular groove 35. The locking block 39 is fitted into the inner wall of the slot 36. A circular plate 310 is fixedly connected to the other end of the sliding rod 38. A spring 311 is sleeved on the outer surface of the sliding rod 38. One end of the spring 311 is fixedly connected to one side of the circular plate 310. The other end of the spring 311 is in contact with one side of the symmetrical pin 37.

[0031] During use, the lower mold 4 is embedded in the mounting groove 31 of the lower mold base 1. The vertical dovetail block 32 on the side wall of the mounting groove 31 is automatically embedded in the second dovetail groove 42 of the lower mold 4, completing the initial positioning and limiting in the horizontal direction. The upper part of the pin of the symmetrical pin 37 is embedded in the first dovetail groove 41 of the bottom wall of the lower mold 4, further fixing the lower mold 4 and preventing it from moving or shifting.

[0032] When maintenance of the lower mold 4 is required, push the circular plate 310. The circular plate 310 drives the slide bar 38 to slide in the push plate of the symmetrical pin 37, so that the locking block 39 disengages from the locking groove 36 and enters the circular groove 35. At this time, the spring 311 is compressed and stores elastic potential energy.

[0033] Next, rotate the circular plate 310 by 90 degrees. The circular plate 310 drives the locking block 39 to rotate 90 degrees around the center of the circular groove 35 through the slide rod 38, so that the locking block 39 changes from a horizontal state to a vertical state. Then, release the circular plate 310, and the spring 311 rebounds. The spring 311 drives the locking block 39 to slide into the groove 34 through the circular plate 310 and the slide rod 38, thereby releasing the locking state of the symmetrical pin 37.

[0034] Then pull out the symmetrical pins 37 to completely remove them from the pin slots 33 and the first dovetail slots 41, thereby releasing the fixation on the lower mold 4. Then lift the lower mold 4 upwards using the handles on both sides of the lower mold 4 to detach the lower mold 4 from the mounting slots 31 and complete the disassembly.

[0035] This device, through the design of the quick-release mechanism 3, pushes the circular plate 310 to compress the spring 311 when maintaining or replacing the lower mold 4. This, combined with the rotation of the locking block 39 and the locking slot 36, allows the symmetrical pins 37 to be quickly unlocked. This enables the quick installation and removal of the lower mold 4, simplifies the operation steps, allows a single person to complete the disassembly, improves maintenance efficiency, and reduces maintenance time.

[0036] By cooperating with the vertical dovetail block 32 and the second dovetail groove 42, horizontal gapless positioning can be achieved, preventing the lower mold 4 from shifting. The lower part of the pin of the symmetrical pin 37 is embedded in the pin groove 33, and the upper part is embedded in the first dovetail groove 41, further locking the mold and preventing vertical loosening. Initial positioning can be completed without additional tools, reducing installation time and improving the reliability of the device.

[0037] Reference Figures 1-7This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: the lower mold base 1 includes a cooling mechanism 6 for cooling the mold. The lower mold base 1 has a liquid storage cavity 11 and a heat dissipation cavity 12 respectively opened on both sides. A water pump 61 is fixedly installed on the bottom wall of the liquid storage cavity 11. A first liquid delivery pipe 62 is fixedly sleeved at the output end of the water pump 61. One end of the first liquid delivery pipe 62 extends to the bottom wall of the mounting groove 31. The sleeve 44 of the water inlet of the cooling cavity 43 is sleeved at the outlet end of the first liquid delivery pipe 62. A second liquid delivery pipe 63 is sleeved on the inner wall of the sleeve 44 of the water outlet of the cooling cavity 43. A heat dissipation pipe 64 is fixedly sleeved at one end of the second liquid delivery pipe 63.

[0038] The heat dissipation pipe 64 is fixedly installed on the lower part of the inner wall of the heat dissipation cavity 12. The heat dissipation pipe 64 is S-shaped. Several heat dissipation fins 65 are fixedly connected to the surface of the heat dissipation pipe 64. A return pipe 66 is fixedly sleeved at one end of the heat dissipation pipe 64. One end of the return pipe 66 passes through the interior of the lower mold base 1 and extends into the interior of the liquid storage cavity 11. Several fans 67 are fixedly installed in the middle of the inner wall of the heat dissipation cavity 12. The upper part of the inner wall of the heat dissipation cavity 12 is connected to the outside. The bottom of the heat dissipation cavity 12 passes through the interior of the lower mold base 1 and extends to the bottom of the lower mold base 1.

[0039] During use, after the water pump 61 is started, the coolant in the storage chamber 11 is sent into the cooling chamber 43 of the lower mold 4 through the first delivery pipe 62 and the sleeve 44. The coolant absorbs the heat generated during the injection molding process in the cooling chamber 43.

[0040] After absorbing heat, the coolant flows into the heat dissipation pipe 64 through the second inlet pipe 63 and flows in an S-shaped meandering manner in the heat dissipation cavity 12, prolonging the heat dissipation time. The heat dissipation fins 65 expand the surface area of ​​the heat dissipation pipe 64. Then, the fan 67 is started, and the fan 67 accelerates air convection heat dissipation to cool the coolant. The cooled coolant flows back to the storage cavity 11 through the return pipe 66, thus completing the circulation.

[0041] This device, through the setting of the cooling mechanism 6, on the one hand, allows the circulating coolant to work in conjunction with the S-shaped heat dissipation pipe 64 and the fan 67 to quickly cool down the lower mold 4, reducing waste and increasing production capacity. On the other hand, the lower mold 4, through the sleeve 44, works with the quick-release mechanism 3, so that the water pipe does not need to be disassembled when changing the mold, reducing maintenance time and improving mold changing efficiency.

[0042] Reference Figures 1-7 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that an electric push rod 7 is fixedly installed at the center of the bottom end of the lower mold base 1. The telescopic shaft of the electric push rod 7 passes through the bottom end of the lower mold base 1 and extends into the interior of the lower mold 4. The telescopic shaft of the electric push rod 7 extending into the interior of the lower mold 4 is fixedly connected to an ejector plate 45. The ejector plate 45 is slidably connected to the inner wall of the lower mold 4.

[0043] During use, after the upper mold 5 separates from the lower mold 4, the electric push rod 7 is activated, and its telescopic axis extends upward, pushing the ejector plate 45 to slide along the inner wall of the lower mold 4. The ejector plate 45 pushes the bottom of the part evenly, ejecting the molded part from the cavity of the lower mold 4. After the part is ejected, the electric push rod 7 retracts, driving the ejector plate 45 back to the initial position, waiting for the next injection cycle, thereby improving the degree of production automation and reducing manual labor intensity.

[0044] Reference Figures 1-7 This is the fourth embodiment of the present invention. The difference between this embodiment and the second embodiment is that: an upper mold base 2 is fixedly installed on the top of the lower mold base 1, a cylinder 21 is fixedly installed at the center of the top of the upper mold base 2, the telescopic shaft of the cylinder 21 is fixedly connected to the upper mold 5, the upper mold 5 is set directly above the lower mold 4, and guide rods 22 are fixedly connected to both sides of the top of the upper mold 5, and the guide rods 22 are slidably connected to the inside of the upper mold base 2.

[0045] An injection tube 23 is fixedly sleeved inside the upper mold base 2. A flexible tube 24 is fixedly sleeved at the bottom end of the injection tube 23. The bottom end of the flexible tube 24 is fixedly sleeved at the top injection port of the upper mold 5.

[0046] During use, the cylinder 21 is started, and its telescopic shaft pushes the upper mold 5 to move vertically down along the guide rod 22 until it is tightly fitted with the lower mold 4. Then, the molten plastic is injected into the injection port of the upper mold 5 through the injection tube 23 and the hose 24, and then filled into the mold cavity.

[0047] The upper mold base 2 achieves precise mold closing and stable injection through the design of cylinder 21 and guide rod 22. Combined with the flexible conveying of hose 24, it improves production efficiency and equipment reliability while ensuring the accuracy of parts, and is especially suitable for the high-speed circulation requirements of automated injection molding production lines.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An injection mold for irregularly shaped parts, comprising a lower mold base (1), characterized in that: The lower mold base (1) is provided with a lower mold (4) inside. The bottom wall of the lower mold (4) is symmetrically provided with a first dovetail groove (41). The side wall of the lower mold (4) is symmetrically provided with a second dovetail groove (42). The side wall of the lower mold (4) is provided with a cooling cavity (43). The inlet and outlet of the cooling cavity (43) are both fixedly sleeved with sleeves (44). The lower mold base (1) includes a quick-release mechanism (3) for easy mold replacement. The lower mold base (1) has an installation groove (31) at the center of its top end. The lower mold (4) is fitted into the inner wall of the installation groove (31). The side wall of the installation groove (31) is symmetrically provided with several vertical dovetail blocks (32). Several vertical dovetail blocks (32) are fitted into the inner wall of the second dovetail groove (42). The bottom wall of the installation groove (31) has a pin groove (33). The inner wall of the pin groove (33) is slidably connected with symmetrical pins (37). The upper part of the pin of the symmetrical pin (37) is fitted into the inner wall of the first dovetail groove (41).

2. The injection mold for irregularly shaped parts according to claim 1, characterized in that: The lower mold base (1) has a sliding groove (34) on one side. The inner wall of the sliding groove (34) has a circular groove (35) and a slot (36) respectively. The sliding rod (38) is slidably connected inside the push plate of the symmetrical pin (37). One end of the sliding rod (38) is fixedly connected to a block (39). The block (39) is slidably connected to the inner wall of the sliding groove (34). The block (39) is rotatably connected to the inner wall of the circular groove (35). The block (39) is fitted into the inner wall of the slot (36). The other end of the sliding rod (38) is fixedly connected to a circular plate (310). A spring (311) is sleeved on the outer surface of the sliding rod (38). One end of the spring (311) is fixedly connected to one side of the circular plate (310). The other end of the spring (311) is in contact with one side of the symmetrical pin (37).

3. The injection mold for irregularly shaped parts according to claim 1, characterized in that: The lower mold base (1) includes a cooling mechanism (6) for cooling the mold. The lower mold base (1) has a liquid storage chamber (11) and a heat dissipation chamber (12) on both sides respectively. A water pump (61) is fixedly installed on the bottom wall of the liquid storage chamber (11). A first liquid delivery pipe (62) is fixedly sleeved at the output end of the water pump (61). One end of the first liquid delivery pipe (62) extends to the bottom wall of the mounting groove (31). The sleeve (44) of the water inlet of the cooling chamber (43) is sleeved at the outlet end of the first liquid delivery pipe (62). A second liquid delivery pipe (63) is sleeved on the inner wall of the sleeve (44) of the water outlet of the cooling chamber (43). A heat dissipation pipe (64) is fixedly sleeved at one end of the second liquid delivery pipe (63).

4. The injection mold for irregularly shaped parts according to claim 3, characterized in that: The heat dissipation pipe (64) is fixedly installed on the lower part of the inner wall of the heat dissipation cavity (12). The heat dissipation pipe (64) is S-shaped. Several heat dissipation fins (65) are fixedly connected to the surface of the heat dissipation pipe (64). A return pipe (66) is fixedly sleeved at one end of the heat dissipation pipe (64). One end of the return pipe (66) passes through the interior of the lower mold base (1) and extends into the interior of the liquid storage cavity (11). Several fans (67) are fixedly installed in the middle of the inner wall of the heat dissipation cavity (12). The upper part of the inner wall of the heat dissipation cavity (12) is connected to the outside. The bottom of the heat dissipation cavity (12) passes through the interior of the lower mold base (1) and extends to the bottom of the lower mold base (1).

5. The injection mold for irregularly shaped parts according to claim 1, characterized in that: An electric push rod (7) is fixedly installed at the center of the bottom end of the lower mold base (1). The telescopic shaft of the electric push rod (7) passes through the bottom end of the lower mold base (1) and extends into the interior of the lower mold (4). The telescopic shaft of the electric push rod (7) extending into the interior of the lower mold (4) is fixedly connected to an ejector plate (45). The ejector plate (45) is slidably connected to the inner wall of the lower mold (4).

6. The injection mold for irregularly shaped parts according to claim 1, characterized in that: The upper mold base (2) is fixedly installed on the top of the lower mold base (1). A cylinder (21) is fixedly installed at the center of the top of the upper mold base (2). The telescopic shaft of the cylinder (21) is fixedly connected to the upper mold (5). The upper mold (5) is located directly above the lower mold (4). Guide rods (22) are fixedly connected to both sides of the top of the upper mold (5). The guide rods (22) are slidably connected inside the upper mold base (2).

7. The injection mold for irregularly shaped parts according to claim 6, characterized in that: An injection tube (23) is fixedly sleeved inside the upper mold base (2), and a flexible tube (24) is fixedly sleeved at the bottom end of the injection tube (23). The bottom end of the flexible tube (24) is fixedly sleeved at the top injection port of the upper mold (5).

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