An injection mold

Abstract

The utility model discloses an injection mold, including lower die holder and setting on the upper die holder of lower die holder, and lower die holder is opened with lower runner and lower mould cavity, and the upper die holder is opened with upper runner and upper mould cavity, and lower runner and upper runner jointly enclose injection runner, and upper mould cavity and lower mould cavity jointly enclose injection chamber, and the lower die holder is opened with positioning hole, and one end of positioning hole is in communication with lower mould cavity, and the other end of positioning hole is located on the outer wall of lower die holder, and is in communication with outside, and the positioning hole is provided with flow guide unit, and one end of flow guide unit is in communication with injection runner, and the other end of flow guide unit is in communication with injection chamber, and the upper die holder is opened with feeding hole, and one end of feeding hole is in communication with upper mould cavity, and the other end of feeding hole is located on the outer wall of upper die holder, and the feeding hole is provided with injection part, and the plastic in molten state can enter injection runner through injection part. The utility model is provided with flow guide unit, can guide the plastic directional flow into the mould cavity key area, avoids partial retention.

Description

Technical Field

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

[0002] A mold is a tool used to make products of a specific shape. In the injection molding process, the injection molding machine usually injects the material through the nozzle into the runner and into the cavity of the mold. The material fills the cavity through the runner and cools to form the injection molded part.

[0003] In the prior art, patent document CN222807518U discloses an injection mold for processing automotive wiring harness parts, including an upper mold base and a lower mold base, which are connected by a hydraulic cylinder. The upper mold base has an upper top plate, and the lower mold base has support plates on both sides of its bottom. A lower bottom plate is located at the bottom of the support plates. Injection grooves are formed on both sides of the top of the lower mold base. A fixing box is located in the middle of the top of the lower bottom plate, and an injection pump is installed inside the fixing box. The output end of the injection pump is connected to an injection pipe, which communicates with the injection groove. A slot is formed on the top of the lower mold base near the injection groove, and the slot communicates with the injection groove. A loosening post is inserted into the slot. This application saves time and labor, improving the efficiency of injection molding production.

[0004] Existing injection molds lack flow guiding structures, which can easily lead to uneven plastic filling and product defects. Therefore, it is necessary to improve this structure to overcome the above-mentioned defects. Utility Model Content

[0005] The purpose of this invention is to provide an injection mold that solves the problem that existing injection molds lack a flow guiding structure, which easily leads to uneven plastic filling and product defects.

[0006] The above-mentioned technical objective of this utility model is achieved by the following technical solution:

[0007] An injection mold includes a lower mold base and an upper mold base disposed on the lower mold base. The lower mold base has a lower runner and a lower mold cavity, and the upper mold base has an upper runner and an upper mold cavity. The lower runner and the upper runner together form an injection runner, and the upper mold cavity and the lower mold cavity together form an injection chamber. The lower mold base has a positioning hole, one end of which communicates with the lower mold cavity, and the other end of which is located on the outer wall of the lower mold base and communicates with the outside. A flow guiding unit is disposed in the positioning hole, one end of which communicates with the injection runner, and the other end of which communicates with the injection chamber. Plastic in the injection runner can enter the injection chamber through the flow guiding unit. The upper mold base has a groin hole, one end of which communicates with the upper mold cavity, and the other end of which is located on the outer wall of the upper mold base. An injection element is disposed in the groin hole, and molten plastic can enter the injection runner through the injection element.

[0008] The present invention is further configured such that: the flow guiding unit includes an ejector pin, a flow guiding component, and a gate; one end of the ejector pin is disposed in a positioning hole; the flow guiding component is disposed on the ejector pin; the ejector pin is used to assist the product in ejection during demolding; the flow guiding component has an inlet and an outlet; one end of the flow guiding component is connected to one end of the gate through the inlet; the other end of the gate is connected to the injection runner; and the other end of the flow guiding component is connected to the injection cavity through the outlet; the plastic in the injection runner can enter the flow guiding component through the gate and flow into the injection cavity through the flow guiding component.

[0009] A further feature of this invention is that the injection component has an injection hole that extends along the injection axis and penetrates the injection component, allowing the plastic to enter the injection molding channel through the injection hole.

[0010] A further feature of this invention is that: a plurality of lower positioning holes are provided on the lower mold base, a positioning block is provided on the lower mold base, one end of the positioning block is connected to the surface of the lower mold base, and the other end of the positioning block extends outward toward the lower mold base; a positioning part is also provided on the lower mold base, one end of the positioning part is connected to the surface of the lower mold base, and the other end of the positioning part extends outward toward the lower mold base.

[0011] The present invention is further configured as follows: the upper mold base is provided with a plurality of upper positioning holes that match the lower positioning holes, and the upper mold base is provided with a positioning groove that matches the positioning block. One end of the positioning groove is located on the surface of the upper mold base, and the other end of the positioning groove extends toward the interior of the upper mold base. The upper mold base is provided with a positioning notch that matches the positioning part. One end of the positioning notch is located on the surface of the upper mold base, and the other end of the positioning notch extends toward the interior of the upper mold base. When the upper mold base and the lower mold base are fitted together, the upper positioning holes and the lower positioning holes are aligned, the positioning block is embedded in the positioning groove, and the positioning part is embedded in the positioning notch, thereby realizing the positioning between the upper mold base and the lower mold base.

[0012] The present invention is further configured such that: the lower mold base has a first positioning plane and a second positioning plane, the first positioning plane and the second positioning plane are connected by an inclined first transition surface, the positioning block is disposed on the first positioning plane, and the positioning part is disposed on the second positioning plane.

[0013] The present invention is further configured such that: the upper mold base has a third positioning plane and a fourth positioning plane, the third positioning plane and the fourth positioning plane are connected by an inclined second transition surface, the positioning groove is located in the third positioning plane, the positioning notch is located in the fourth positioning plane, when the upper mold base and the lower mold base are fitted together, the first positioning plane is in contact with the third positioning plane, the second positioning plane is in contact with the fourth positioning plane, and the first transition surface is in contact with the second transition surface.

[0014] In summary, this utility model has the following beneficial effects:

[0015] 1. Directional flow guidance: The flow guide is connected to the injection runner through the gate to guide the plastic into the key areas of the mold cavity, avoiding local stagnation.

[0016] 2. Closed-loop flow channel structure: The combination of upper and lower flow channels forms a closed injection channel, which reduces heat loss and pressure decay of molten plastic during the flow process and ensures uniform filling.

[0017] 3. Ejector pin integrated design: The ejector pin has the functions of supporting the flow guide and demolding, and the product is directly ejected during demolding. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the lower mold base.

[0020] Figure 3 This is a schematic diagram of the upper mold base.

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

[0022] Figure 5 This is a longitudinal sectional view of the present invention.

[0023] Figure 6 This is a partial structural schematic diagram of the present invention.

[0024] Numerical labels: 1. Lower mold base, 2. Lower runner, 3. Lower mold cavity, 4. Upper mold base, 5. Upper runner, 6. Injection runner, 7. Injection chamber, 8. Injection part, 9. Ejector pin, 10. Guide part, 11. Gate, 12. Inlet, 13. Outlet, 14. Injection hole, 15. Lower positioning hole, 16. Positioning block, 17. Positioning part, 18. Upper positioning hole, 19. Positioning groove, 20. Positioning notch, 21. First positioning plane, 22. Second positioning plane, 23. First transition surface, 24. Third positioning plane, 25. Fourth positioning plane, 26. Second transition surface, 27. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with the illustrations and specific embodiments.

[0026] like Figures 1 to 6As shown, the present invention proposes an injection mold including a lower mold base 1 and an upper mold base 4 disposed on the lower mold base 1. The lower mold base 1 has a lower runner 2 and a lower mold cavity 3, and the upper mold base 4 has an upper runner 5 and an upper mold cavity 6. When the upper mold base 4 is fitted with the lower mold base 1, the lower runner 2 and the upper runner 5 together form an injection runner 7, and the upper mold cavity 6 and the lower mold cavity 3 together form an injection chamber 8. The lower mold base 1 has a positioning hole, one end of which is connected to the lower mold cavity 3, and the other end of which is located in the lower mold cavity 3. On the outer wall of the mold base 1, which is connected to the outside, a flow guiding unit is provided in the positioning hole. One end of the flow guiding unit is connected to the injection runner 7, and the other end is connected to the injection cavity 8. The plastic in the injection runner 7 can enter the injection cavity 8 through the flow guiding unit. The upper mold base 4 is provided with a material inlet hole. One end of the material inlet hole is connected to the upper mold cavity 6, and the other end of the material inlet hole is located on the outer wall of the upper mold base 4. An injection element 9 is provided in the material inlet hole. Molten plastic can enter the injection runner 7 through the injection element 9. The flow path of the plastic in this utility model is as follows: molten plastic from injection element 9 → injection runner 7 (lower runner 2 + upper runner 5) → flow guiding unit → injection cavity 8 (lower mold cavity 3 + upper mold cavity 6).

[0027] The flow guiding unit includes an ejector pin 10, a flow guiding component 11, and a gate 12. One end of the ejector pin 10 is set in a positioning hole, and the flow guiding component 11 is set on the ejector pin 10. The ejector pin 10 is used to support the flow guiding component 11 and assist the product in ejection during demolding. The flow guiding component 11 has an inlet 13 and an outlet 14. One end of the flow guiding component 11 is connected to one end of the gate 12 through the inlet 13. The other end of the gate 12 is connected to the injection runner 7. The other end of the flow guiding component 11 is connected to the injection chamber 8 through the outlet 14. The plastic in the injection runner 7 can enter the flow guiding component 11 through the gate 12 and then flow into the injection chamber 8 through the flow guiding component 11.

[0028] An injection hole 15 is provided on the injection part 9. The injection hole 15 extends along the injection axis and penetrates the injection part 9, so that the plastic can enter the injection channel 7 through the injection hole 15.

[0029] The lower mold base 1 has multiple lower positioning holes 16 and a positioning block 17. One end of the positioning block 17 is connected to the surface of the lower mold base 1, and the other end of the positioning block 17 extends outward toward the lower mold base 1. The lower mold base 1 also has a positioning part 18. One end of the positioning part 18 is connected to the surface of the lower mold base 1, and the other end of the positioning part 18 extends outward toward the lower mold base 1.

[0030] The upper mold base 4 has multiple upper positioning holes 19 that match the lower positioning holes 16. The upper mold base 4 also has positioning grooves 20 that match the positioning blocks 17. One end of the positioning grooves 20 is located on the surface of the upper mold base 4, and the other end of the positioning grooves 20 extends toward the interior of the upper mold base 4. The upper mold base 4 has positioning notches 21 that match the positioning parts 18. One end of the positioning notches 21 is located on the surface of the upper mold base 4, and the other end of the positioning notches 21 extends toward the interior of the upper mold base 4. When the upper mold base 4 and the lower mold base 1 are fitted together, the upper positioning holes 19 and the lower positioning holes 16 are aligned, the positioning blocks 17 are embedded in the positioning grooves 20, and the positioning parts 18 are embedded in the positioning notches 21, thereby achieving positioning between the upper mold base 4 and the lower mold base 1.

[0031] The lower mold base 1 has a first positioning plane 22 and a second positioning plane 23. The first positioning plane 22 and the second positioning plane 23 are connected by an inclined first transition surface 24. The positioning block 17 is disposed on the first positioning plane 22, and the positioning part 18 is disposed on the second positioning plane 23.

[0032] The upper mold base 4 has a third positioning plane 25 and a fourth positioning plane 26, which are connected by an inclined second transition surface 27. The positioning groove 20 is located within the third positioning plane 25, and the positioning notch 21 is located within the fourth positioning plane 26. When the upper mold base 4 and the lower mold base 1 are in contact, the first positioning plane 22 contacts the third positioning plane 25, the second positioning plane 23 contacts the fourth positioning plane 26, and the first transition surface 24 contacts the second transition surface 27.

[0033] The usage process and principle of this utility model are as follows: In use, the upper mold base 4 and the lower mold base 1 are fitted together, the lower runner 2 and the upper runner 5 form a closed injection runner 7, and the lower mold cavity 3 and the upper mold cavity 6 form an injection cavity 8. Molten plastic is pressed into the feed hole through the injection part 9, enters the injection runner 7 through the upper runner 5, and flows into the injection cavity 8 through the guide unit, filling each area of ​​the injection cavity 8. After injection is completed, wait for the injection molded part to cool and solidify. After cooling is completed, the upper mold base 4 opens the mold, and the external drive structure (not the content claimed in this application, omitted in the figure) drives the ejector pin 10 to eject the injection molded part, thus achieving demolding.

[0034] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. 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 component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. In this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0035] Any descriptions not covered in the above specific embodiments of this utility model belong to the well-known technology in the field, and can be implemented by referring to the well-known technology.

[0036] 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 claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An injection mold, comprising a lower mold base and an upper mold base disposed on the lower mold base, characterized in that, The lower mold base has a lower runner and a lower mold cavity, and the upper mold base has an upper runner and an upper mold cavity. The lower runner and the upper runner together form an injection runner, and the upper mold cavity and the lower mold cavity together form an injection chamber. The lower mold base has a positioning hole, one end of which is connected to the lower mold cavity, and the other end of which is located on the outer wall of the lower mold base and connected to the outside. A flow guiding unit is provided in the positioning hole, one end of which is connected to the injection runner, and the other end of which is connected to the injection chamber. The plastic in the injection runner can enter the injection chamber through the flow guiding unit. The upper mold base has a feed hole, one end of which is connected to the upper mold cavity, and the other end of which is located on the outer wall of the upper mold base. An injection component is provided in the feed hole.

2. The injection mold according to claim 1, characterized in that, The flow guiding unit includes an ejector pin, a flow guiding component, and a gate. One end of the ejector pin is disposed in a positioning hole. The flow guiding component is disposed on the ejector pin and has an inlet and an outlet. One end of the flow guiding component is connected to one end of the gate through the inlet. The other end of the gate is connected to the injection runner. The other end of the flow guiding component is connected to the injection chamber through the outlet. The plastic in the injection runner can enter the flow guiding component through the gate and flow into the injection chamber through the flow guiding component.

3. The injection mold according to claim 1, characterized in that, The injection component has an injection hole that extends along the injection axis and penetrates the injection component, allowing the plastic to enter the injection molding channel through the injection hole.

4. The injection mold according to claim 1, characterized in that, The lower mold base has multiple lower positioning holes and a positioning block. One end of the positioning block is connected to the surface of the lower mold base, and the other end of the positioning block extends outward toward the lower mold base. The lower mold base also has a positioning part, one end of which is connected to the surface of the lower mold base, and the other end of which extends outward toward the lower mold base.

5. The injection mold according to claim 1, characterized in that, The upper mold base has multiple upper positioning holes that match the lower positioning holes. The upper mold base also has positioning grooves that match the positioning blocks. One end of the positioning groove is located on the surface of the upper mold base, and the other end of the positioning groove extends toward the interior of the upper mold base. The upper mold base also has positioning notches that match the positioning parts. One end of the positioning notches is located on the surface of the upper mold base, and the other end of the positioning notches extends toward the interior of the upper mold base.

6. The injection mold according to claim 4, characterized in that, The lower mold base has a first positioning plane and a second positioning plane, which are connected by an inclined first transition surface. The positioning block is disposed on the first positioning plane, and the positioning part is disposed on the second positioning plane.

7. An injection mold according to claim 5, characterized in that, The upper mold base has a third positioning plane and a fourth positioning plane. The third positioning plane and the fourth positioning plane are connected by an inclined second transition surface. The positioning groove is located in the third positioning plane, and the positioning notch is located in the fourth positioning plane.

Images