Injection mold with quick change insert structure

Abstract

The utility model discloses a kind of injection mould with quick change mould insert structure, including upper die assembly, lower die assembly and movable insert, and insert installation groove is provided on lower die assembly;Locking hole is opened in the side wall of insert installation groove;The side of movable insert is provided with the locking slot corresponding with the position of locking hole;Further include elastic locking mechanism, and elastic locking mechanism part is contained in locking hole, and can be extended and clamped into locking slot under the action of elastic force, to lock movable insert in insert installation groove.Elastic locking mechanism and locking slot are cooperated, the " one plug self-locking " of movable insert is realized, and innovatively combine perpendicular ejection groove and inverted trapezoidal guide structure, jointly constitute an efficient, reliable quick change scheme, the structure discards traditional bolt locking mode, allows operator to complete the quick replacement and locking of insert by hand without any tool, greatly improves the efficiency of change type and production flexibility.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, and in particular to an injection mold with a quick-change insert structure. Background Technology

[0002] In the injection molding industry, to meet the market demand for diverse products in small batches, it is often necessary to quickly change products by replacing movable inserts in the mold. Currently, inserts are mostly fixed to the mold body by bolts or clamping plates. During replacement, operators must use tools to disassemble the bolts or clamping blocks one by one, a tedious and time-consuming process that severely impacts production efficiency and equipment utilization. Furthermore, frequent disassembly and assembly can lead to thread wear, weakening positioning accuracy and increasing maintenance costs. Utility Model Content

[0003] The purpose of this invention is to provide an injection mold with a quick-change insert structure to solve the above-mentioned problems.

[0004] According to one aspect of the present invention, an injection mold with a quick-change insert structure is provided, comprising an upper mold assembly, a lower mold assembly, and a movable insert. The lower mold assembly is provided with an insert mounting groove for accommodating the movable insert. A locking hole is provided on the side wall of the insert mounting groove. A locking groove corresponding to the position of the locking hole is provided on the side of the movable insert. The mold also includes an elastic locking mechanism, which is partially housed in the locking hole and can extend and engage with the locking groove under the action of elastic force to lock the movable insert in the insert mounting groove.

[0005] In some embodiments, the elastic locking mechanism includes a locking pin, a spring, and an end plug; the locking hole is a stepped hole; the end plug is fixed to the large-diameter section of the locking hole; the spring is disposed within the large-diameter section of the locking hole, with one end connected to the end plug and the other end connected to one end of the locking pin; the other end of the locking pin is a ball head or a beveled structure, and can partially extend out of the small-diameter section of the locking hole under the elastic force of the spring.

[0006] In some embodiments, the locking groove extends vertically and is provided with an ejector groove for inserting a rod, the top of which penetrates the top surface of the movable insert.

[0007] In some embodiments, an inverted trapezoidal guide rail is provided in the mounting groove of the insert along the movement direction of the movable insert, and an inverted trapezoidal guide groove is provided at the bottom of the movable insert corresponding to the inverted trapezoidal guide rail.

[0008] In some embodiments, the ball head or beveled portion of the locking pin extends out of the locking hole and engages with the locking groove.

[0009] In some embodiments, the number of locking holes and elastic locking mechanisms is at least two, and they are symmetrically arranged on opposite sides of the insert mounting groove.

[0010] Compared with the prior art, the beneficial effects of this application are as follows:

[0011] This invention achieves "one-insertion self-locking" of movable inserts through the cooperation of an elastic locking mechanism and a locking groove. It also innovatively combines a vertical ejection groove and an inverted trapezoidal guide structure to form a highly efficient and reliable quick-change solution. This structure eliminates the traditional bolt locking method, allowing operators to quickly replace and lock inserts by hand without any tools, greatly improving changeover efficiency and production flexibility. Simultaneously, the inverted trapezoidal guide rail and the symmetrically arranged locking mechanism work together to ensure excellent positioning accuracy and anti-displacement stability of the movable inserts under high mold pressure, effectively guaranteeing product molding quality. Furthermore, this design avoids frequent disassembly and assembly of threaded fasteners, eliminating the risk of thread wear at its source. This not only makes the structure more durable but also reduces long-term maintenance costs, resulting in a design that combines ease of operation, operational reliability, and economical maintenance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the lower mold assembly of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the movable insert of this utility model. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] refer to Figures 1 to 2 This application provides an injection mold with a quick-change insert structure, including an upper mold assembly, a lower mold assembly 1, and a movable insert 2. The lower mold assembly 1 is provided with an insert mounting groove 3 for accommodating the movable insert 2. The side wall of the insert mounting groove 3 is provided with a locking hole. The side of the movable insert 2 is provided with a locking groove 4 corresponding to the position of the locking hole. It also includes an elastic locking mechanism 5, which is partially housed in the locking hole and can extend and engage with the locking groove 4 under the action of elastic force to lock the movable insert 2 in the insert mounting groove 3.

[0016] By cooperating with the locking groove 4 on the movable insert 2 through the elastic locking mechanism 5 set on the side wall of the insert mounting groove 3, the movable insert 2 can be quickly locked and released, completely eliminating the traditional bolt locking method. The insert can be replaced without tools, and the operation process is changed from the tedious "tightening screws" to the simple "insert and pull", which greatly improves the changeover efficiency, reduces the operation difficulty and time cost, and provides a basic structural guarantee for the rapid changeover of molds.

[0017] In some embodiments, the elastic locking mechanism 5 includes a locking pin, a spring, and an end plug; the locking hole is a stepped hole; the end plug is fixed to the large-diameter section of the locking hole; the spring is disposed within the large-diameter section of the locking hole, with one end connected to the end plug and the other end connected to one end of the locking pin; the other end of the locking pin is a ball head or a beveled structure, and can partially extend out of the small-diameter section of the locking hole under the elastic force of the spring. The spring provides a continuous and stable locking force, ensuring that the ball head or bevel of the locking pin can reliably engage with the locking groove 4; simultaneously, the end plug fixation modularizes the entire mechanism, simplifying assembly and facilitating later maintenance and spring replacement, greatly improving the reliability and maintainability of the mold.

[0018] In some embodiments, the locking groove 4 extends vertically and is provided with an ejector groove 6 for inserting a rod, the top of which penetrates the top surface of the movable insert 2. When the insert needs to be replaced, the operator only needs to insert a simple rod-shaped tool (such as a screwdriver) into the ejector groove 6 and press down to overcome the elastic locking force and easily eject the movable insert 2. This perfectly solves the problem of difficulty in removing the insert by hand, making the disassembly process as convenient and efficient as the installation process, forming a complete tool-free operation loop.

[0019] In some embodiments, an inverted trapezoidal guide rail 7 is provided in the insert mounting groove 3 along the movement direction of the movable insert 2, and an inverted trapezoidal guide groove 8 is provided at the bottom of the movable insert 2 corresponding to the inverted trapezoidal guide rail 7. This can automatically guide the insert into precise position during mold closing, and utilize the mechanical self-locking principle of the inverted trapezoid to effectively prevent the insert from shifting upwards or loosening under high injection pressure, greatly enhancing the stability of the insert in the working state and the dimensional accuracy of the molded product.

[0020] In some embodiments, the ball head or beveled structure of the locking pin extends out of the locking hole and engages with the locking groove 4. This allows the end of the locking pin to be pushed back by the side wall of the movable insert 2 during installation, and then automatically pops out under the action of a spring after aligning with the locking groove 4, thus achieving a "guided self-locking" function for insert installation. This makes the installation process smoother and less strenuous, and reduces the risk of damage due to alignment errors.

[0021] In some embodiments, the number of locking holes and elastic locking mechanisms 5 is at least two, and they are symmetrically arranged on opposite sides of the insert mounting groove 3. The symmetrical locking force can act evenly on both sides of the movable insert 2, effectively preventing the insert from tilting or lifting on one side during the locking process, ensuring that the insert is subjected to uniform force and accurately positioned, thereby further improving its stability and the consistency of product molding quality during high-pressure injection molding.

[0022] During installation, first align the inverted trapezoidal guide groove 8 at the bottom of the movable insert 2 with the inverted trapezoidal guide rail 7 in the insert mounting groove 3, and insert it vertically. During insertion, the side wall of the movable insert 2 will contact and press the ball head or bevel of the locking pin, forcing the locking pin to retract into the locking hole against the spring force. When the movable insert 2 is fully placed in place, the locking groove 4 on its side moves to the position aligned with the locking hole. Under the action of the spring return force, the locking pin quickly pops out and locks into the locking groove 4. With a crisp "click" sound, the movable insert 2 is automatically and reliably locked in the working position, completing the quick installation.

[0023] During disassembly, the operator only needs to take a rod-shaped tool of appropriate diameter (such as a hex wrench or screwdriver) and insert it vertically into the ejection groove 6 on the top surface of the movable insert 2, which communicates with the locking groove 4. Then, apply downward pressure, and the rod of the tool will push the tail of the locking pin, causing it to compress the spring and retract completely into the locking hole, thereby disengaging its ball head or bevel from the locking groove 4 and releasing the lock. At this time, the movable insert 2 will be pushed upward a short distance by the downward pressure of the tool or its own slight elasticity, and the operator can easily remove it from the mounting groove by hand or tool, completing the quick disassembly.

[0024] This invention achieves "one-insertion self-locking" of the movable insert 2 through the cooperation of the elastic locking mechanism 5 and the locking groove 4. It also innovatively combines the vertical ejection groove 6 and the inverted trapezoidal guide structure to form an efficient and reliable quick-change solution. This structure eliminates the traditional bolt locking method, allowing operators to quickly replace and lock inserts by hand without any tools, greatly improving changeover efficiency and production flexibility. Simultaneously, the inverted trapezoidal guide rail 7 and the symmetrically arranged locking mechanism work together to ensure that the movable insert 2 has excellent positioning accuracy and anti-displacement stability under high mold closing pressure, effectively guaranteeing product molding quality. Furthermore, this design avoids frequent disassembly and assembly of threaded fasteners, eliminating the risk of thread wear at its source. This not only makes the structure more durable but also reduces long-term maintenance costs, combining ease of operation, reliability, and economical maintenance.

[0025] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An injection mold with a quick-change insert structure, comprising an upper mold assembly, a lower mold assembly, and a movable insert, characterized in that: The lower mold assembly is provided with an insert mounting groove for accommodating the movable insert; the side wall of the insert mounting groove is provided with a locking hole; the side of the movable insert is provided with a locking groove corresponding to the position of the locking hole; it also includes an elastic locking mechanism, which is partially housed in the locking hole and can extend and engage with the locking groove under the action of elastic force to lock the movable insert in the insert mounting groove.

2. The injection mold with a quick-change insert structure according to claim 1, characterized in that, The elastic locking mechanism includes a locking pin, a spring, and an end plug; the locking hole is a stepped hole; the end plug is fixed to the large-diameter section of the locking hole; the spring is disposed in the large-diameter section of the locking hole, with one end connected to the end plug and the other end connected to one end of the locking pin; the other end of the locking pin is a ball head or a beveled structure, and can partially extend out of the small-diameter section of the locking hole under the elastic force of the spring.

3. The injection mold with a quick-change insert structure according to claim 1, characterized in that, The locking groove extends vertically and is provided with an ejector groove for inserting the rod body. The top end of the ejector groove penetrates the top surface of the movable insert.

4. The injection mold with a quick-change insert structure according to claim 3, characterized in that, An inverted trapezoidal guide rail is provided in the mounting groove of the insert along the moving direction of the movable insert, and an inverted trapezoidal guide groove is provided at the bottom of the movable insert corresponding to the inverted trapezoidal guide rail.

5. The injection mold with a quick-change insert structure according to claim 2, characterized in that, After the ball head or beveled structure of the locking pin extends out of the locking hole, it forms a snap-fit ​​engagement with the locking groove.

6. The injection mold with a quick-change insert structure according to claim 1, characterized in that, The number of locking holes and elastic locking mechanisms is at least two, and they are symmetrically arranged on opposite sides of the insert mounting groove.

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