Internal pressure type glue injection forming mold

Abstract

The utility model provides an internal pressure type glue injection forming mould which comprises an upper mould base plate, a lower mould base plate and a mould plate, the upper mould base plate is provided with a pouring gate, the mould plate is fixed on one side of the lower mould base plate back to the upper mould base plate, the mould plate is provided with a plurality of cavities, the lower mould base plate is provided with a material cavity, and the material cavity is communicated with the pouring gate. A plurality of discharging ports are formed in the lower die base plate, one ends of the discharging ports are communicated with the material cavity, the other ends of the discharging ports are communicated with the cavity, a piston plate is fixedly connected to the upper die base plate and corresponds to the material cavity, a connecting hole communicated with the pouring gate is formed in the piston plate, and the connecting hole is communicated with the pouring gate. Therefore, the purpose of improving the production efficiency is achieved.

Description

Technical Field

[0001] The utility model relates to a glue injection mold, in particular to an internal pressure type glue injection molding mold. Background Art

[0002] At present, the Chinese patent with authorization announcement number CN216400327U discloses a liquid silicone two-color injection mold, including a mold body, a main flow channel for liquid silicone to flow and an auxiliary flow channel for colored rubber to flow in the mold body, and a main injection port for liquid silicone injection and an auxiliary injection port for colored rubber injection are provided on the mold body; the auxiliary flow channel is in communication with the main flow channel, and the bottom of the main flow channel has a glue outlet for outputting the two-color wire for injection molding.

[0003] When in use, liquid silicone is injected into the main injection port, and the liquid silicone flows into the main flow channel through the main injection port. Colored rubber is injected into the auxiliary injection port, and the colored rubber flows into the auxiliary flow channel through the auxiliary injection port. The auxiliary flow channel and the main flow channel flow together, and the liquid silicone and the colored rubber merge in the main flow channel. The wire is injected with glue to form a two-color wire and is output from the glue outlet.

[0004] However, this type of mold can only inject glue into one product at a time. The second product can only be injected after one product is unloaded, so the production efficiency is low. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide an internal pressure type injection molding die to achieve the purpose of improving production efficiency.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: an internal pressure injection molding mold, comprising an upper mold pad, a lower mold pad and a template, the upper mold pad is provided with a gate, the template is fixed to the side of the lower mold pad facing away from the upper mold pad, the template is provided with a plurality of cavities, the lower mold pad is provided with a material cavity, the lower mold pad is provided with a plurality of discharge ports, one end of the discharge port is connected with the material cavity, and the other end of the discharge port is connected with the mold cavity, the upper mold pad is fixedly connected with a piston plate, the piston plate corresponds to the material cavity, and the piston plate is provided with a connecting hole connected with the gate.

[0007] To implement the above technical solution, the glue is injected into the material cavity through the gate, and pressure is applied to the upper mold pad to move the piston plate backward toward the lower mold pad, so that the glue can be discharged from multiple outlets and enter the cavity at the same time, thereby achieving the effect of obtaining multiple products at one time and achieving the purpose of improving production efficiency.

[0008] As a preferred solution of the utility model, the lower mold pad includes an upper mounting layer, a lower mounting layer and a thermal insulation plate, the two sides of the thermal insulation plate are respectively connected to the upper mounting layer and the lower mounting layer, the material cavity is opened on the upper mounting layer, the upper mounting layer is provided with a thermal insulation hole, the lower mounting layer is provided with a heating hole, the thermal insulation hole and the heating hole are both arranged around the discharge port, a thermal insulation medium is passed into the thermal insulation hole, a heating medium is passed into the heating hole, and the temperature of the heating medium is higher than the temperature of the thermal insulation medium.

[0009] To implement the above technical solution, a heat-insulating medium is passed into the heat-insulating hole so that the upper mounting layer can play a heat-insulating effect and the glue in the material cavity can maintain a high activity. During the movement of the piston plate, the glue passes through the discharge port and enters the cavity. The lower mounting layer is heated by the heating medium to quickly heat up the glue in the cavity, so that the product can be quickly formed, further improving production efficiency. The barrier effect of the insulation board makes it difficult for heat exchange to occur between the upper mounting layer and the lower mounting layer.

[0010] As a preferred solution of the utility model, the insulation hole includes a feed part, a discharge part and an S-shaped insulation part, the two ends of the S-shaped insulation part are connected to the feed part and the discharge part, the discharge port is located inside the S-shaped insulation part, and the feed part and the discharge part are located on the same side of the upper installation layer.

[0011] To implement the above technical solution, the insulation medium is introduced from the feed portion into the S-shaped insulation portion and then discharged from the discharge portion. During this period, heat exchange occurs between the insulation medium and the upper mounting layer to keep the glue in the cavity active and to allow the glue in the cavity to be evenly heated.

[0012] As a preferred solution of the utility model, the heating hole includes an entry portion, an exit portion and an S-shaped heating portion, the two ends of the S-shaped heating portion are connected to the entry portion and the exit portion, the discharge port is located inside the S-shaped heating portion, and the entry portion and the exit portion are located on the same side of the lower mounting layer.

[0013] To implement the above technical solution, the heating medium enters the S-shaped heating part from the inlet part and is then discharged from the outlet part. During this period, heat exchange occurs between the heating medium and the lower mounting layer to make the glue in the cavity have a higher temperature so that the glue can be quickly molded.

[0014] As a preferred solution of the utility model, a nozzle is fixedly connected to the discharge port, the nozzle penetrates into the lower mounting layer, an extrusion hole is opened on the nozzle, the inner diameter of the end of the extrusion hole close to the discharge port is larger than the outer diameter of the end of the extrusion hole away from the discharge port, and the nozzle corresponds to the cavity.

[0015] By implementing the above technical solution and setting the injection nozzle, the glue can enter the mold cavity more smoothly.

[0016] As a preferred solution of the present utility model, the template includes a first mold core, a second mold core, a third mold core, a fourth mold core, a pressure plate and a molding part, the molding part is fixed on the lower mold pad, the two sides of the first mold core are respectively in contact with the molding part and the second mold core, the fourth mold core is slidably connected to the second mold core, the third mold core is slidably connected to the fourth mold core, a cavity is formed between the molding part, the first mold core, the second mold core, the third mold core and the fourth mold core, the pressure plate is in contact with the third mold core and is connected to the fourth mold core through an elastic component.

[0017] To implement the above technical solution, the pressure plate moves toward the molding part so that the two sides of the first mold core are respectively pressed against the molding part and the second mold core. At the same time, pressure is applied to the fourth mold core through the elastic component so that the fourth mold core drives the third mold core to move toward the molding part, so that the third mold core is in contact with the molding part, and the elastic component and the pressure plate form a secondary pressurization on the third mold core to make the cavity more stable.

[0018] As a preferred solution of the utility model, the elastic component includes an elastic member, a retaining ring, and a connecting seat. The retaining ring is fixed on the outer wall of the fourth mold core, the connecting seat is sleeved on the outside of the fourth mold core and is used to interfere with the retaining ring. One end of the elastic member is connected to the pressure plate, and the other end is connected to the connecting seat.

[0019] To implement the above technical solution, the pressure plate moves toward the forming portion, so that the elastic member applies pressure to the retaining ring through the connecting seat, so that the retaining ring drives the fourth mold core to move, and the fourth mold core drives the third mold core to move synchronously. As the pressure plate continues to move, the pressure plate collides with the end of the third mold core away from the forming portion, thereby realizing a secondary pressurization process on the third mold core.

[0020] As a preferred solution of the utility model, a retaining ring is fixedly connected to the third mold core, and the retaining ring is used to abut against the end of the fourth mold core.

[0021] To implement the above technical solution, when the pressure plate moves away from the forming part, the second mold core contacts the retaining ring and causes the fourth mold core to move away from the forming part. After the fourth mold core contacts the retaining ring, the third mold can be moved away from the forming part to achieve a rapid material removal process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the position of the insulation hole in the embodiment;

[0023] Figure 2 A schematic diagram of the positions of the heating holes in the embodiment;

[0024] Figure 3It is a cross-sectional schematic diagram of the utility model;

[0025] Figure 4 It is a schematic diagram of the structure of the template;

[0026] Figure 5 A schematic diagram showing the structure of the third mold core;

[0027] Figure 6 A schematic diagram showing the structure of the fourth mold core;

[0028] Figure 7 It is a structural schematic diagram of the connecting seat.

[0029] : Illustrations: 11. upper mold pad; 12. lower mold pad; 2. gate; 31. material cavity; 32. discharge port; 33. piston plate; 331. connecting hole; 41. upper mounting layer; 42. lower mounting layer; 43. insulation plate; 5. insulation hole; 51. feed part; 52. discharge part; 53. S-shaped insulation part; 6. heating hole; 61. inlet part; 62. outlet part; 63. S-shaped heating part; 7. nozzle; 71. extrusion hole; 8. template; 81. first mold core; 82. second mold core; 83. third mold core; 84. fourth mold core; 85. pressure plate; 86. molding part; 861. injection hole; 9. elastic component; 91. elastic member; 92. retaining ring; 93. connecting seat; 94. retaining ring; 100. product. DETAILED DESCRIPTION

[0030] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0031] An internal pressure type injection molding die comprises an upper die pad 11, a lower die pad 12 and a template 8. A gate 2 is provided on the upper die pad 11, and the gate 2 is located at the center of the upper die pad 11.

[0032] The lower die pad 12 is provided with a material cavity 31 with a circular cross section, and 44 discharge ports 32 are provided on the lower die pad 12. The 44 discharge ports 32 are arranged in a hexagonal shape. One end of the discharge port 32 is connected to the material cavity 31, and the other end of the discharge port 32 is connected to the mold cavity.

[0033] A disc-shaped piston plate 33 is fixedly connected to the upper die pad 11, and the piston plate 33 corresponds to the material cavity 31. A connecting hole 331 connected to the gate 2 is opened on the piston plate 33. The glue is injected into the material cavity 31 through the gate 2 through the connecting hole 331. Pressure is applied to the upper die pad 11 to squeeze the glue in the material cavity 31 out of the discharge port 32.

[0034] The lower mold pad 12 includes an upper mounting layer 41, a lower mounting layer 42 and a thermal insulation plate 43. The two sides of the thermal insulation plate 43 are fixedly connected to the upper mounting layer 41 and the lower mounting layer 42 respectively. The thermal insulation plate 43 is made of a resin plate and can withstand a high temperature of 300°. The material cavity 31 is opened on the upper mounting layer 41, and the upper mounting layer 41 is provided with a thermal insulation hole 5.

[0035] The insulation hole 5 includes a feed portion 51, a discharge portion 52 and an S-shaped insulation portion 53. Both ends of the S-shaped insulation portion 53 are connected to the feed portion 51 and the discharge portion 52. The discharge port 32 is located inside the S-shaped insulation portion 53. The feed portion 51 and the discharge portion 52 are located on the same side of the upper mounting layer 41. The insulation medium enters the S-shaped insulation portion 53 from the feed portion 51, and then is discharged from the discharge portion 52 along the S-shaped insulation portion 53 to realize the circulation of the insulation medium. The insulation medium is water. The temperature of the insulation medium is 80°-90°.

[0036] A heating hole 6 is provided in the lower installation layer 42. The heating hole 6 includes an inlet portion 61, an outlet portion 62 and an S-shaped heating portion 63. Both ends of the S-shaped heating portion 63 are connected to the inlet portion 61 and the outlet portion 62. The discharge port 32 is located inside the S-shaped heating portion 63. The inlet portion 61 and the outlet portion 62 are located on the same side of the lower installation layer 42. The heating medium is injected into the S-shaped heating portion 63 from the inlet portion 61, and the heating medium is then led out from the outlet portion 62 along the S-shaped heating portion 63 to realize the circulation of the heating medium. The heating medium is oil, and the temperature of the heating medium is 180°-190°.

[0037] The S-shaped heating portion 63 and the S-shaped heat-insulating portion 53 are both arranged around the discharge port 32 .

[0038] The discharge port 32 is fixedly connected with a nozzle 7, which penetrates into the lower mounting layer 42. The nozzle 7 is provided with an extrusion hole 71, the inner diameter of the end of the extrusion hole 71 close to the discharge port 32 is larger than the outer diameter of the end of the extrusion hole 71 away from the discharge port 32, and the nozzle 7 corresponds to the cavity.

[0039] When the piston plate 33 moves toward the lower die pad 12 , the glue passes through the injection nozzle 7 more smoothly and quickly.

[0040] The mold plate 8 includes a first mold core 81, a second mold core 82, a third mold core 83, a fourth mold core 84, a pressure plate 85 and a molding part 86. The molding part 86 is fixed to the side of the lower mold plate 12 facing away from the upper mold plate 11. An injection hole 861 is opened on the molding part 86, and the injection hole 861 is connected to the nozzle 7.

[0041] The first mold core 81 is in contact with the molding part 86 and the second mold core 82 on both sides. The fourth mold core 84 is slidably connected to the second mold core 82, and the third mold core 83 is slidably connected to the fourth mold core 84. A mold cavity is formed between the molding part 86, the first mold core 81, the second mold core 82, the third mold core 83, and the fourth mold core 84. The number of mold cavities on the template 8 is equal to the number of the discharge ports 32.

[0042] The pressurizing plate 85 contacts the third mold core 83 and is connected to the fourth mold core 84 via the elastic component 9 to achieve secondary pressurization of the third mold.

[0043] The elastic component 9 includes an elastic member 91, a retaining ring 92, and a connecting seat 93. The retaining ring 92 is fixed to the outer wall of the fourth mold core 84, and the connecting seat 93 is sleeved outside the fourth mold core 84 and is used to contact the retaining ring 92. One end of the elastic member 91 is connected to the pressure plate 85, and the other end is connected to the connecting seat 93. The elastic member 91 is a spring.

[0044] The pressure plate 85 moves toward the direction approaching the lower mold pad 12, and the elastic member 91 applies pressure to the connecting seat 93, and the connecting seat 93 applies pressure to the retaining ring 92, so that the fourth mold core 84 applies pressure to the third mold core 83, so that the third mold core 83 contacts the forming portion 86. As the pressure plate 85 continues to move, the pressure plate 85 contacts the end of the third mold core 83, so that the third mold core 83 further tends to move closer to the forming portion 86, so as to realize the secondary pressurization process of the third mold core 83.

[0045] As mentioned above, after the glue is led out from the nozzle 7, it enters the injection hole 861 and is then injected into the mold cavity along one end of the third mold core 83 close to the molding portion 86. The heating hole 6 heats the glue quickly to form the mold quickly.

[0046] A retaining ring 94 is fixedly connected to the third mold core 83 , and the retaining ring 94 is used to abut against the end of the fourth mold core 84 .

[0047] After the product 100 is formed, the pressure plate 85 moves away from the forming portion 86, the second mold core 82 contacts the retaining ring 92 and causes the fourth mold core 84 to move away from the forming portion 86, and the fourth mold core 84 contacts the retaining ring 94 to cause the third mold to move away from the forming portion 86, so as to achieve a rapid unloading process. Thus, 44 products 100 can be formed and unloaded at the same time, greatly improving production efficiency.

[0048] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. An internal pressure injection molding die, comprising an upper die pad (11), a lower die pad (12) and a mold plate (8), wherein the upper die pad (11) is provided with a gate (2), and wherein: The template (8) is fixed to the side of the lower mold pad (12) facing away from the upper mold pad (11), and a plurality of cavities are provided on the template (8). A material cavity (31) is provided on the lower mold pad (12), and a plurality of discharge ports (32) are provided on the lower mold pad (12). One end of the discharge port (32) is connected to the material cavity (31), and the other end of the discharge port (32) is connected to the mold cavity. A piston plate (33) is fixedly connected to the upper mold pad (11), and the piston plate (33) corresponds to the material cavity (31). A connecting hole (331) connected to the gate (2) is provided on the piston plate (33).

2. The internal pressure injection molding die according to claim 1, characterized in that: The lower mold pad (12) comprises an upper mounting layer (41), a lower mounting layer (42) and a thermal insulation plate (43), the two sides of the thermal insulation plate (43) are respectively connected to the upper mounting layer (41) and the lower mounting layer (42), the material cavity (31) is opened on the upper mounting layer (41), the upper mounting layer (41) is provided with a thermal insulation hole (5), the lower mounting layer (42) is provided with a heating hole (6), the thermal insulation hole (5) and the heating hole (6) are both arranged around the discharge port (32), a thermal insulation medium is passed into the thermal insulation hole (5), a heating medium is passed into the heating hole (6), and the temperature of the heating medium is higher than the temperature of the thermal insulation medium.

3. The internal pressure injection molding die according to claim 2, characterized in that: The insulation hole (5) comprises a feed portion (51), a discharge portion (52) and an S-shaped insulation portion (53); both ends of the S-shaped insulation portion (53) are connected to the feed portion (51) and the discharge portion (52); the discharge port (32) is located inside the S-shaped insulation portion (53); and the feed portion (51) and the discharge portion (52) are located on the same side of the upper mounting layer (41).

4. The internal pressure injection molding die according to claim 2, characterized in that: The heating hole (6) comprises an inlet portion (61), an outlet portion (62) and an S-shaped heating portion (63); both ends of the S-shaped heating portion (63) are connected to the inlet portion (61) and the outlet portion (62); the discharge port (32) is located inside the S-shaped heating portion (63); and the inlet portion (61) and the outlet portion (62) are located on the same side of the lower mounting layer (42).

5. The internal pressure injection molding die according to claim 4, characterized in that: A nozzle (7) is fixedly connected to the discharge port (32), and the nozzle (7) penetrates into the lower mounting layer (42). An extrusion hole (71) is provided on the nozzle (7), and the inner diameter of the end of the extrusion hole (71) close to the discharge port (32) is larger than the outer diameter of the end of the extrusion hole (71) away from the discharge port (32), and the nozzle (7) corresponds to the cavity.

6. The internal pressure injection molding die according to claim 2, characterized in that: The template (8) includes a first mold core (81), a second mold core (82), a third mold core (83), a fourth mold core (84), a pressure plate (85) and a molding part (86); the molding part (86) is fixed on the lower mold pad (12); the two sides of the first mold core (81) are respectively in contact with the molding part (86) and the second mold core (82); the fourth mold core (84) is slidably connected to the second mold core (82); the third mold core (83) is slidably connected to the fourth mold core (84); a mold cavity is formed between the molding part (86), the first mold core (81), the second mold core (82), the third mold core (83) and the fourth mold core (84); the pressure plate (85) is in contact with the third mold core (83) and is connected to the fourth mold core (84) through an elastic component (9).

7. The internal pressure injection molding die according to claim 6, characterized in that: The elastic component (9) includes an elastic member (91), a retaining ring (92), and a connecting seat (93). The retaining ring (92) is fixed on the outer wall of the fourth mold core (84). The connecting seat (93) is sleeved on the outside of the fourth mold core (84) and is used to contact the retaining ring (92). One end of the elastic member (91) is connected to the pressure plate (85), and the other end is connected to the connecting seat (93).

8. The internal pressure injection molding die according to claim 7, characterized in that: A retaining ring (94) is fixedly connected to the third mold core (83), and the retaining ring (94) is used to abut against the end of the fourth mold core (84).

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