Injection mold and its delayed mold opening cooling structure

Abstract

The utility model discloses an injection mold and its delayed mold opening cooling structure, including movable mould, still include the slider and locking block of setting in movable mould, locking block has delay part, and delay part has push inclined plane and delay straight surface, and the one end of slider is set up with the guide groove of cooperation delay part and the surface of its upper and lower, and delay part is set up in the movable guide groove, and the inner groove wall of guide groove is provided with the push sliding surface of cooperation with push inclined plane and the sliding straight surface of cooperation with delay straight surface, and the one end of slider is set up with cooling air channel and sprue way near the cavity, and cooling air channel includes the air inlet groove and air outlet groove of intercommunication, and the air inlet of air inlet groove is used for connecting the gas pipe of movable mould, and the gas outlet of air outlet groove corresponds sprue way, and thus can guarantee that the head is cooled first, and then delays the core pulling of slider, and thus effectively shortens the forming period and guarantees sprue quality.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold and its delayed mold opening cooling structure. Background Technology

[0002] Currently, injection molds use sliders for core pulling, and these sliders also have a sprue structure. Generally, it is necessary to wait for the sprue to cool down slowly before the core can be pulled. This results in a long molding cycle, and it is possible that the sprue has not cooled down before the slider suddenly moves away from the cavity to pull the core. This will cause the gate of the injection molded part to have poor quality due to excessive thermal stress. Utility Model Content

[0003] To address the aforementioned problems, this invention provides an injection mold and its delayed mold opening cooling structure, which ensures that the sprue is cooled first, and then the slide core pulling is delayed, thus effectively shortening the molding cycle and ensuring the quality of the gate.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] This utility model provides a delayed mold opening cooling structure for an injection mold, including a moving mold, and further including a slider and a locking block disposed on the moving mold; the locking block has a delay portion, the delay portion having a pushing inclined surface and a delay straight surface; the end of the slider away from the cavity of the moving mold is provided with a guide groove that cooperates with the delay portion and penetrates its upper and lower surfaces, the delay portion being movably disposed in the guide groove, the inner wall of the guide groove being provided with a pushing sliding surface that cooperates with the pushing inclined surface and a sliding straight surface that cooperates with the delay straight surface; the end of the slider near the cavity is provided with a cooling air passage and a sprue, the cooling air passage including a connected air inlet groove and an air outlet groove, the air inlet of the air inlet groove being used to connect to the air supply pipe of the moving mold, and the air outlet of the air outlet groove corresponding to the sprue.

[0006] Furthermore, the top height of the delayed surface is greater than the height of the gating system.

[0007] Furthermore, the difference between the top height of the delayed surface and the height of the gating system ranges from 2 to 3 mm.

[0008] Furthermore, the pushing inclined surface and the delay straight surface are arranged opposite to each other, and the pushing sliding surface and the sliding straight surface are arranged opposite to each other.

[0009] This utility model provides an injection mold, which includes at least the above-mentioned delayed mold opening cooling structure.

[0010] The technical solution provided by this utility model has the following beneficial effects:

[0011] By cooperating with the slider and the locking block, and by blowing air into and cooling the sprue through the cooling air channel, the sprue head is cooled first, and then the slider core pulling is delayed, thus effectively shortening the molding cycle and ensuring the quality of the sprue. Attached Figure Description

[0012] Figure 1 The figure shown is a cross-sectional view of the delayed mold opening cooling structure of the injection mold in Embodiment 1;

[0013] Figure 2 The diagram shown is a schematic of the slider in Embodiment 1;

[0014] Figure 3 The image shown is a cross-sectional view of the slider in Embodiment 1. Detailed Implementation

[0015] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0016] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0017] Example 1

[0018] Reference Figures 1 to 3 Example 1 provides a delayed mold opening cooling structure for injection mold (hereinafter referred to as delayed mold opening cooling structure), including a moving mold 3 and a slider 1 and a locking block 2 disposed on the moving mold 3, wherein the left end of the slider 1 extends into the cavity 31 of the moving mold 3 to realize core pulling.

[0019] The locking block 2 has a delay part 21. The left and right outer walls of the delay part 21 are respectively provided with a delay straight surface 212 and a pushing inclined surface 211. The right end of the slider 1 away from the cavity 31 is provided with a guide groove 11 that matches the delay part 21 and penetrates its upper and lower surfaces. The delay part 21 is movably inserted into the guide groove 11. The left and right inner walls of the guide groove 11 are respectively provided with a sliding straight surface 112 that matches the delay straight surface 212 and a pushing sliding surface 111 that matches the pushing inclined surface 211.

[0020] During mold opening, a vertical sliding mechanism is first formed between the delay surface 212 of the delay section 21 and the sliding surface 112 of the slider 1. During the downward movement of the locking block 2, which is vertically withdrawn from the guide groove 11, the sliding surface 112 continuously abuts against the delay surface 212 of the slider 1. Therefore, the delay surface 212 ensures that the slider 1 can only begin to move away from the cavity 31 after a certain delay, preventing a sudden rightward movement of the slider 1 away from the cavity 31 under the mold opening force. After the delay stroke on the delay surface 212 is completed, a sliding engagement is formed between the pushing inclined surface 211 of the delay section 21 and the pushing sliding surface 111 of the slider 1, causing the slider 1 to move to the right in the direction away from the cavity 31, thus completing the core-pulling action. At this time, the length of the delay surface 212 determines the delay time for the slider 1 to move to the right or the core-pulling delay time.

[0021] Also, such as Figure 2 and Figure 3 As shown, the left end of the slider 1 near the cavity 31 is provided with a cooling air channel 12 and a sprue 13. The cooling air channel 12 includes an inlet groove and an outlet groove that are connected. The inlet 121 of the inlet groove is used to connect to the air supply pipe of the moving mold 3, and the outlet 122 of the outlet groove corresponds to the sprue 13.

[0022] In this embodiment, as Figure 1 As shown, the top height of the delay surface 212 is greater than the height of the gate 13. Specifically, the difference between the top height of the delay surface 212 and the height of the gate 13 is 2-3 mm. Therefore, during the delay stroke of the delay surface 212 of the locking block 2 sliding on the sliding surface 112 of the slider 1, the air outlet 122 of the cooling air passage 12 continuously blows air and cools the material head at the gate 13, ensuring sufficient cooling time.

[0023] In summary, by working together with the slider 1 and the locking block 2, and by blowing air and cooling the sprue 13 through the cooling air channel 12, the sprue head is cooled first, and then the slider core pulling is delayed. This effectively shortens the molding cycle (e.g., the molding cycle can be shortened by 5 to 10 seconds) and ensures the quality of the sprue.

[0024] Example 2

[0025] Example 2 provides an injection mold that includes at least the delayed mold opening cooling structure of Example 1.

[0026] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A delayed mold opening cooling structure for an injection mold, comprising a moving mold, characterized in that: It also includes a slider and a locking block disposed on the moving mold; The locking block has a delay portion, which has a pushing inclined surface and a delay straight surface; the end of the slider away from the cavity of the moving mold is provided with a guide groove that matches the delay portion and penetrates its upper and lower surfaces, the delay portion is movably inserted into the guide groove, and the inner wall of the guide groove is provided with a pushing sliding surface that matches the pushing inclined surface and a sliding straight surface that matches the delay straight surface; The slider is provided with a cooling air passage and a sprue at one end near the cavity. The cooling air passage includes an inlet groove and an outlet groove that are connected to each other. The inlet of the inlet groove is used to connect to the air supply pipe of the moving mold, and the outlet of the outlet groove corresponds to the sprue.

2. The delayed mold opening cooling structure for injection molds according to claim 1, characterized in that: The top height of the delay surface is greater than the height of the gating system.

3. The delayed mold opening cooling structure for injection molds according to claim 2, characterized in that: The difference between the top height of the delay surface and the height of the gating system is in the range of 2 to 3 mm.

4. The delayed mold opening cooling structure for injection molds according to any one of claims 1-3, characterized in that: The pushing inclined surface and the delay straight surface are arranged opposite to each other, and the pushing sliding surface and the sliding straight surface are arranged opposite to each other.

5. An injection mold, characterized in that: It includes at least the delayed mold opening cooling structure as described in any one of claims 1-4.

Images