Silica gel mold pouring mechanism

Abstract

The utility model discloses a silica gel mold pouring mechanism, which belongs to the technical field of silica gel mold pouring, comprises a connector connected with a silica gel mold pouring pump head, and is characterized in that a baffle plate is arranged on the inner wall of an inner runner positioned above a necking opening, a through hole is formed in the axis of the baffle plate, and runner holes are uniformly formed in the outer side of the through hole; a spring is arranged between the baffle and the flow guide plate, and flow guide holes are evenly formed in the flow guide plate. The silica gel mold pouring mechanism has the beneficial effects that the baffle, the guide plate, the guide post, the sealing plate and the spring are combined to form the silica gel mold pouring mechanism, the residual pressure can be overcome under the action of the spring, and the sealing plate and the baffle are reset under the action of the spring, so that each outlet is closed, and the sealing effect is completed; the phenomenon that liquid silica gel flows out of a pouring mechanism in a pouring gap of the nozzle due to excessive pressure in an inner runner of the nozzle or external factors is avoided; the heating sleeve effectively prevents solidification of the liquid silica gel, and production requirements are well met.

Description

Technical fields:

[0001] This utility model belongs to the field of silicone mold casting technology, and more specifically relates to a silicone mold casting mechanism. Background technology:

[0002] A silicone injection molding machine is a specialized injection molding machine for processing silicone materials. It features excellent insulation properties, resistance to high and low temperatures, resistance to vaporization aging, sterilization, and oil resistance, making it suitable for various fields such as electronics, medical, and oil mining.

[0003] The working principle of a silicone injection molding machine mainly includes the following steps:

[0004] 1. Feeding: Add silicone granules or sheet silicone into the hopper of the injection molding machine;

[0005] 2. Melting and Plasticizing: The silicone material is fed from the hopper to the heating cylinder via a screw, where it is heated to a molten state. Driven by the screw or high-pressure pump, the silicone is conveyed forward along the screw groove and compacted, gradually plasticizing, melting, and homogenizing.

[0006] 3. Injection Molding: Molten silicone is injected into the mold cavity through a nozzle under the propulsion of a screw or high-pressure pump. During the injection process, the silicone undergoes pressure holding, cooling, and solidification within the mold cavity.

[0007] 4. Cooling and curing: The silicone completes the curing process after it has cooled sufficiently in the mold;

[0008] 5. Demolding and part removal: After the silicone has completely cured, open the mold, remove the finished product, and carry out subsequent processing.

[0009] However, after the molten silicone is injected into the mold cavity through the nozzle by the screw or high-pressure pump, the nozzle needs to be separated from the mold cavity after the mold is switched. At this time, due to the good fluidity, fast vulcanization speed and good performance of liquid silicone, liquid silicone will flow out from the gating mechanism in the nozzle gap due to residual pressure in the flow channel or external factors such as mechanical vibration, resulting in waste. The different physical uniformity of the overflow also seriously affects the quality of the products in subsequent processes. Utility Model Content:

[0010] To solve the above problems and overcome the shortcomings of the existing technology, this utility model provides a silicone mold casting mechanism;

[0011] The first technical problem to be solved is that due to residual pressure in the inner flow channel of the nozzle or external factors such as mechanical vibration, liquid silicone will flow out of the pouring mechanism in the pouring gap of the nozzle, resulting in waste. The different physical uniformity of the overflow also seriously affects the quality of the products in subsequent processes.

[0012] The specific technical solution of this utility model to solve the above-mentioned technical problems is as follows: a silicone mold casting mechanism, including a connector connected to a silicone mold casting pump head, the outlet of the connector being connected to a housing, and the inner flow channel of the housing being connected to the outlet of the connector; the outlet end of the inner flow channel of the housing is configured as a conical constriction, and a discharge nozzle is provided at the end of the inner flow channel wall of the conical constriction, and the discharge nozzle is provided with an annular sealing plate.

[0013] A baffle is installed on the inner wall of the inner flow channel located above the constriction. A through hole is opened on the axis of the baffle, and flow channel holes are evenly opened on the outer side of the through hole.

[0014] A guide plate is installed above the baffle, and a guide post is installed on the lower end face of the guide plate. The guide post passes through the through hole of the baffle, and a sealing plate is installed at the end of the guide post through a connecting rod. The sealing plate is installed on the outside of the annular sealing plate and can be sealed with the annular sealing plate by the pull of the connecting rod.

[0015] A spring is installed between the baffle and the guide plate, and the guide plate has evenly spaced guide holes.

[0016] Furthermore, a heating sleeve is fitted onto the outer side of the housing.

[0017] Furthermore, the heating sleeve and the shell together form a reinforcing cavity.

[0018] Furthermore, a baffle is fixedly installed on the inner wall of the inner flow channel located above the constriction, and the baffle is fixed to the inner wall of the inner flow channel.

[0019] Furthermore, an annular baffle ring is provided on the inner wall of the inner flow channel located above the constriction, and the baffle ring engages with the conical constriction to form a baffle.

[0020] The beneficial effects of this utility model are:

[0021] One advantage of this invention is that it provides a silicone mold casting mechanism that enables the casting of the mold cavity;

[0022] One advantage of this utility model is that it provides a silicone mold casting mechanism composed of a baffle, a guide plate, a guide column, a sealing plate and a spring. It can overcome the residual pressure through the action of the spring, and the sealing plate and the baffle are reset under the action of the spring, thereby closing each outlet and completing the sealing function. This avoids liquid silicone from flowing out of the casting mechanism in the nozzle casting gap due to residual pressure in the inner flow channel of the nozzle or due to external factors.

[0023] One advantage of this invention is that a heating sleeve is provided on the outer side of the housing, which effectively prevents the solidification of liquid silicone and well meets production needs. Attached image description:

[0024] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Appendix Figure 2 This is a schematic diagram of the guide plate structure of this utility model;

[0026] Appendix Figure 3 This is a schematic diagram of the baffle structure of this utility model; in the attached drawing:

[0027] 1. Connector; 2. Heating jacket; 3. Housing; 4. Guide plate; 5. Spring; 6. Baffle ring; 7. Baffle; 8. Sealing plate; 9. Annular sealing plate; 10. Guide post; 11. Tapered neck; 12. Inner flow channel; 13. Guide hole; 14. Flow channel hole; 15. Through hole. Detailed implementation method:

[0028] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "left," "right," "rear," "lower left," "upper right," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] The specific embodiment of this utility model: The silicone mold casting mechanism includes a connector 1 connected to a silicone mold casting pump head, the outlet of the connector 1 connected to a housing 3, and the inner flow channel 12 of the housing 3 communicating with the outlet of the connector 1; the outlet end of the inner flow channel 12 of the housing 3 is configured as a conical constriction 11, and an outlet nozzle is provided at the end of the inner flow channel 12 wall of the conical constriction 11, and the outlet nozzle is provided with an annular sealing plate 9; characterized in that:

[0030] A baffle 7 is provided on the inner wall of the inner flow channel 12 located above the constriction. A through hole 15 is provided on the axis of the baffle 7, and flow channel holes 14 are uniformly provided on the outer side of the through hole 15.

[0031] A guide plate 4 is provided above the baffle 7, and a guide post 10 is provided on the lower end face of the guide plate 4. The guide post 10 passes through the through hole 15 of the baffle 7. A sealing plate 8 is provided at the end of the guide post 10 through a connecting rod. The sealing plate 8 is located on the outside of the annular sealing plate 9 and can be sealed with the annular sealing plate 9 by the pulling of the connecting rod.

[0032] A spring 5 is provided between the baffle 7 and the guide plate 4, and the guide plate 4 is provided with guide holes 13 evenly.

[0033] Furthermore, a heating sleeve 2 is fitted onto the outer side of the housing 3.

[0034] Furthermore, the heating sleeve 2 and the shell 3 form a reinforced cavity.

[0035] Furthermore, a baffle 7 is fixedly installed on the inner wall of the inner flow channel 12 located above the constriction, and the baffle 7 is fixed to the inner wall of the inner flow channel 12. In one embodiment of this invention, the spring 5 is directly engaged with the retaining ring 6. In a preferred embodiment, the spring 5 can also be engaged with the baffle 7, which is then fixed to the wall of the inner flow channel 12. There is no substantial difference between these two embodiments.

[0036] Furthermore, an annular baffle 6 is provided on the inner wall of the inner flow channel 12 located above the constriction, and the baffle 6 engages with the conical constriction 11 to form a baffle 7.

[0037] It should be noted that this utility model is a silicone mold casting mechanism. In specific operation,

[0038] 1. Connect the silicone mold casting mechanism to the silicone mold casting pump head using connector 1.

[0039] The silicone mold is poured according to the normal process. The molten silicone is injected into the mold cavity through the nozzle under the push of the screw or high pressure pump. The high pressure molten silicone flows in the inner flow channel 12. The difference is that the high pressure molten silicone pushes the guide plate 4 and overcomes the spring 5 to move downward, thereby driving the guide post 10 and the sealing plate 8 to move downward. The sealing plate 8 contacts and seals with the annular sealing plate 9 through the pull of the connecting rod. The guide post 10 can play a good guiding and stabilizing role.

[0040] At this time, the high-pressure molten silicone flows out through the guide hole 13 of the guide plate 4 and the flow channel hole 14 of the baffle 7, and then through the annular sealing plate 9 of the discharge nozzle.

[0041] 2. After changing the mold, the nozzle disengages from the mold cavity after the screw or high-pressure pump releases pressure. At this time, residual pressure exists in the inner flow channel 12, and the molten silicone will overflow due to mechanical vibration.

[0042] The improvement of this utility model is as follows: after the screw or high-pressure pump releases pressure, the spring 5 is directly locked onto the retaining ring 6 or the spring 5 is locked onto the baffle 7, and the baffle 7 is then fixed to the wall of the inner flow channel 12. There is no substantial difference between the two. Due to the presence of the guide hole 13 and the flow channel hole 14, the entire inner flow channel 12 is an isobaric environment. The spring 5 pushes the guide plate 4 upward, thereby driving the sealing plate 8 to seal with the annular sealing plate 9 of the discharge nozzle, thus sealing the entire inner flow channel 12 and preventing liquid silicone from flowing out of the pouring mechanism in the nozzle pouring gap due to residual pressure in the inner flow channel of the nozzle or due to external factors.

[0043] 3. A heating sleeve 2 is fitted on the outside of the shell 3, which effectively prevents the solidification of liquid silicone and meets the production needs well.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A silicone mold casting mechanism, comprising a connector (1) connected to a silicone mold casting pump head, the outlet of the connector (1) being connected to a housing (3), and the inner flow channel (12) of the housing (3) being connected to the outlet of the connector (1); the outlet end of the inner flow channel (12) of the housing (3) being configured as a conical constriction (11), and an outlet nozzle being provided at the end of the inner flow channel (12) wall of the conical constriction (11), the outlet nozzle being provided with an annular sealing plate (9); characterized in that: A baffle (7) is provided on the inner wall of the inner flow channel (12) located above the constriction. A through hole (15) is provided on the axis of the baffle (7), and flow channel holes (14) are uniformly provided on the outer side of the through hole (15). A guide plate (4) is provided above the baffle (7), and a guide post (10) is provided on the lower end face of the guide plate (4). The guide post (10) passes through the through hole (15) of the baffle (7). A sealing plate (8) is provided at the end of the guide post (10) through a connecting rod. The sealing plate (8) is located on the outside of the annular sealing plate (9) and can be sealed with the annular sealing plate (9) by the pulling of the connecting rod. A spring (5) is provided between the baffle (7) and the guide plate (4), and the guide plate (4) is provided with guide holes (13) evenly.

2. The silicone mold casting mechanism according to claim 1, characterized in that... A heating sleeve (2) is fitted on the outside of the housing (3).

3. The silicone mold casting mechanism according to claim 2, characterized in that... The heating sleeve (2) and the shell (3) form a reinforced cavity.

4. The silicone mold casting mechanism according to claim 1, characterized in that... A baffle (7) is fixedly installed on the inner wall of the inner flow channel (12) located above the constriction, and the baffle (7) is fixed to the inner wall of the inner flow channel (12).

5. The silicone mold casting mechanism according to claim 1, characterized in that... An annular baffle (6) is provided on the inner wall of the inner flow channel (12) located above the constriction, and a baffle (7) is provided to engage with the conical constriction (11).

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