Die drawing mechanism for injection mold and injection mold

Abstract

The utility model relates to the technical field of injection molds, and provides a mold drawing mechanism for an injection mold and the injection mold, and the mold drawing mechanism comprises a locking seat, a first movable plate and a second movable plate, the locking piece is movably arranged in the locking seat; one end of the clamping piece is fixedly arranged on the outer side of the second movable plate, and the other end of the clamping piece is movably clamped with the locking piece; one end of the unlocking piece is fixedly arranged on the outer side wall of the first fixing base, and the other end of the unlocking piece movably abuts against the locking piece. Compared with the prior art, the mold drawing mechanism has the advantages that the locking seat, the locking piece, the clamping piece and the unlocking piece are mutually matched, the locking piece is movably clamped with the clamping piece, and the unlocking piece is movably propped against the locking piece, so that a traditional nylon rubber plug screw is replaced, the service life of the mold drawing mechanism in the injection mold is prolonged, and the mold drawing mechanism is convenient to use. And the manufacturing cost of the product is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a die drawing mechanism for an injection mold and an injection mold. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of colors, shapes from simple to complex, sizes from large to small, and precise product size. The product is easy to update and can be made into parts with complex shapes. Injection molding is suitable for mass production and molding processing fields such as products with complex shapes. At a certain temperature, the completely molten plastic material is stirred by a screw, injected into the mold cavity with high pressure, and cooled and solidified to obtain a molded product. This method is suitable for mass production of parts with complex shapes and is one of the important processing methods.

[0003] Ordinary injection molds generally include a fixed mold component, a movable mold component and an ejector mechanism. The movable mold component is driven by the injection molding machine to move closer to or farther away from the fixed mold component, thereby completing the closing and opening of the injection mold. After the injection mold is opened, the injection molding machine drives the ejector mechanism to eject the product formed in the injection mold out of the injection mold. This manufacturing method will leave slugs on the product after the product is ejected from the mold. This slug needs to be removed by manual trimming, which increases the production process of the product and increases the production cost of the product.

[0004] In order to solve the above problems, a three-plate mold structure is extended in the injection mold. In this three-plate mold structure, a template is set on the fixed mold assembly, which can move synchronously with the movable mold assembly during mold opening and separate from the movable mold assembly after moving a certain distance. The product is molded between this template and the movable mold assembly. The flow channel that introduces the raw materials on the injection molding machine into the injection mold is set on the back of the above template. The mold opening process of this three-plate mold is as follows: the injection molding machine drives the movable mold assembly to separate from the fixed mold assembly. When the movable mold assembly starts to move, it drives the above template to separate from the fixed mold assembly, so that the flow channel is exposed to the outside of the injection mold, and then The above-mentioned template is separated from the movable mold assembly, so that the material head formed after the raw material in the flow channel solidifies is separated from the product. In this process, in order to enable the movable mold assembly to drive the above-mentioned template to move synchronously with the movable mold assembly during the mold opening process, a nylon plug screw is generally fixed on the movable mold assembly. When the mold is closed, the above-mentioned template is fixed to the movable mold assembly through the force expansion effect of the nylon plug screw, so that the movable mold assembly can drive the above-mentioned template to move when the mold is opened. After moving to a certain distance, a limiting structure is set on the fixed mold assembly to enable the above-mentioned template to overcome the expansion force of the nylon plug screw, and finally the above-mentioned template is forcibly separated from the movable mold assembly.

[0005] Since the nylon plug screw achieves its function through the extrusion deformation of the nylon thereon, and the injection mold always maintains a certain temperature (generally around 200°C) during the working process, the service life of the nylon plug screw is short and it needs to be replaced frequently, which invisibly increases the manufacturing cost of the product. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a die drawing mechanism and an injection mold for an injection mold in view of the current status of the prior art.

[0007] The technical solution adopted by the utility model to solve the above technical problems is: a die drawing mechanism for an injection mold is proposed, the injection mold has a fixed mold component and a movable mold component that are movably matched, the fixed mold component has a first fixed seat and a first movable plate that is movably matched with the first fixed seat, the movable mold component has a second fixed seat and a second movable plate that is movably matched with the second fixed seat, the die drawing mechanism is used to keep the first movable plate and the second movable plate fixed first and then separate from each other when the fixed mold component is separated from the movable mold component, and the die drawing mechanism includes:

[0008] A locking seat, which is fixed on the outer side wall of the first movable plate;

[0009] A locking member, which is movably arranged in the locking seat along a direction perpendicular to the direction from the fixed mold assembly to the movable mold assembly;

[0010] A clamping member, one end of which is fixedly arranged on the outer side of the second movable plate, and the other end of which is inserted into the locking seat and movably clamped with the locking member;

[0011] An unlocking member, one end of which is fixedly mounted on the outer side wall of the first fixing seat, and the other end of which is movably inserted into the locking seat and movably abuts against the locking member;

[0012] The locking member can be engaged with the engaging member, so that when the movable mold assembly is separated from the fixed mold assembly, the first movable plate and the second movable plate are fixed, and when the first fixing seat is separated from the first movable plate and one end of the unlocking member is driven away from the locking seat, the engaging state with the engaging member is disengaged, and the first movable plate and the second movable plate are in a separable state.

[0013] In the above-mentioned die drawing mechanism for an injection mold, the locking member is provided with a through portion which penetrates the wall thickness of the locking member in a direction parallel to the direction from the movable mold assembly to the fixed mold assembly, and the clamping member extends outward to form a clamping portion, which passes through the through portion and is movably clamped with the end face of the locking member.

[0014] In the above-mentioned die drawing mechanism for an injection mold, a first inclined surface is provided on a side of the locking member facing the unlocking member, and a second inclined surface is provided on a side of the unlocking member facing the locking member, and the first inclined surface movably abuts against the second inclined surface.

[0015] In the above-mentioned die drawing mechanism for an injection mold, the locking seat comprises:

[0016] A main body, wherein a receiving cavity is provided in the main body, and the locking member is movably provided in the receiving cavity;

[0017] An elastic member, which is arranged in the accommodating cavity, wherein one end of the elastic member that generates elastic deformation is pressed against the side wall of the accommodating cavity, and the other end of the elastic member that generates elastic deformation is pressed against the locking member;

[0018] A cover plate is threadedly connected to the main body.

[0019] In the above-mentioned die drawing mechanism for an injection mold, a third inclined surface is arranged on the clamping member, a fourth inclined surface is arranged on the locking member, and the third inclined surface movably abuts against the fourth inclined surface.

[0020] The utility model solves the above technical problem and further provides an injection mold, comprising the above-mentioned die drawing mechanism for the injection mold.

[0021] Compared with the prior art, the advantage of the utility model lies in that through the mutual cooperation of the locking seat, the locking member, the snap-connecting member and the unlocking member, the movable snap connection between the locking member and the snap-connecting member, and the movable abutment between the unlocking member and the locking member, the traditional nylon plug screw is replaced, the service life of the drawing mechanism in the injection mold is improved, and the manufacturing cost of the product is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the injection mold of the present invention;

[0023] Figure 2 yes Figure 1 A partial cross-sectional view of

[0024] Figure 3 It is a three-dimensional diagram of the locking member.

[0025] In the figure, 1, first fixed seat; 2, first movable plate; 3, second fixed seat; 4, second movable plate; 5, locking seat; 6, locking member; 7, snap-fit ​​member; 8, unlocking member; 9, penetration portion; 10, snap-fit ​​portion; 11, first inclined surface; 12, second inclined surface; 13, main body; 14, elastic member; 15, cover plate; 16, third inclined surface; 17, fourth inclined surface. DETAILED DESCRIPTION

[0026] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0027] like Figures 1 to 3 As shown, in this scheme, the application and specific structure of the drawing mechanism in the injection mold are mainly described in detail.

[0028] A die drawing mechanism for an injection mold, the injection mold having a fixed mold component and a movable mold component that are movably matched, the fixed mold component having a first fixed seat 1 and a first movable plate 2 that is movably matched with the first fixed seat 1, the movable mold component having a second fixed seat 3 and a second movable plate 4 that is movably matched with the second fixed seat 3, the die drawing mechanism is used to keep the first movable plate 2 and the second movable plate 4 fixed first and then separate from each other when the fixed mold component is separated from the movable mold component, the die drawing mechanism includes: a locking seat 5, which is fixedly arranged on the outer side wall of the first movable plate 2; a locking member 6, which is movably arranged in the locking seat 5 along a direction perpendicular to the direction from the fixed mold component to the movable mold component; a clamping member Part 7, one end of which is fixedly arranged on the outer side of the second movable plate 4, and the other end of the clamping member 7 is inserted into the locking seat 5 and movably clamped with the locking member 6; an unlocking member 8, one end of which is fixedly arranged on the outer side wall of the first fixed seat 1, and the other end of the unlocking member 8 is movably inserted in the locking seat 5 and movably abuts against the locking member 6; the locking member 6 can be clamped with the clamping member 7, so that when the movable mold assembly and the fixed mold assembly are separated, the first movable plate 2 and the second movable plate 4 are fixed, and when the first fixed seat 1 is separated from the first movable plate 2 and one end of the unlocking member 8 is driven away from the locking seat 5, it is disengaged from the clamping state with the clamping member 7, and the first movable plate 2 and the second movable plate 4 are in a separable state.

[0029] During the mold closing process of the injection mold equipped with the drawing mechanism of the present scheme, the first movable plate 2 and the second movable plate 4 are brought close to each other under the drive of the movable mold assembly, so that the clamping piece 7 is inserted into the locking seat 5 and the clamping piece 7 is first clamped with the locking piece 6, and then the first movable plate 2 and the first fixed seat 1 are brought close to each other, so that the unlocking piece 8 is also inserted into the locking seat 5. During the mold opening process of the injection mold, the movable mold assembly is separated from the fixed mold assembly. At this time, since the locking piece 6 and the clamping piece 7 are clamped with each other, the first movable plate 2 is separated from the first fixed seat 1 driven by the second movable plate 4. After the first movable plate 2 moves to make the unlocking piece 8 abut against the locking piece 6 and pushes the locking piece 6 to move in the locking seat 5 until the locking piece 6 and the clamping piece 7 are disengaged, the first fixed seat 1 limits the first movable plate 2 and the second movable plate 4 to move synchronously, and then the movable mold assembly continues to move in the direction away from the fixed mold assembly until the injection mold is fully opened.

[0030] Preferably, the restriction of the first fixed seat 1 on the first movable plate 2 can be achieved in the following manner: a plurality of limit rods are arranged on the first fixed seat 1, one end of the limit rod passes through the first movable plate 2 and is fixed in the first fixed seat 1, and the other end of the limit rod is movably engaged with the first movable plate 2.

[0031] In this solution, through the mutual cooperation of the locking seat 5, the locking member 6, the snap-fitting member 7 and the unlocking member 8, the movable snap-fitting between the locking member 6 and the snap-fitting member 7, and the movable abutment between the unlocking member 8 and the locking member 6, the traditional nylon plug screw is replaced, the service life of the drawing mechanism in the injection mold is improved, and the manufacturing cost of the product is reduced.

[0032] Furthermore, the locking member 6 is provided with a through portion 9 which penetrates the wall thickness of the locking member 6 in a direction parallel to the driven mold assembly and pointing to the fixed mold assembly. A clamping portion 10 is formed on the clamping member 7 extending outward. The clamping portion 10 passes through the through portion 9 and is movably clamped with the end face of the locking member 6. The setting of the clamping portion 10 and the through portion 9 is used to achieve the clamping connection between the locking member 6 and the clamping member 7.

[0033] Furthermore, a first inclined surface 11 is provided on a side of the locking member 6 facing the unlocking member 8 , and a second inclined surface 12 is provided on a side of the unlocking member 8 facing the locking member 6 . The first inclined surface 11 and the second inclined surface 12 are movably abutted against each other.

[0034] When the unlocking member 8 moves in a direction away from the locking seat 5, driving the locking member 6 to move in the locking seat 5, so that the engaging member 7 and the locking member 6 are disengaged, the second inclined surface 12 provided on the unlocking member 8 passes through the first inclined surface 11 on the locking member 6, pushing the locking member 6 to move in the locking seat 5, making the movement of the locking member 6 smoother and preventing the locking member 6 and the unlocking member 8 from being stuck in the locking seat 5.

[0035] Furthermore, the locking seat 5 includes: a main body 13, in which a receiving cavity is provided, and the locking member 6 is movably provided in the receiving cavity; an elastic member 14, which is provided in the receiving cavity, and one end of the elastic member 14 that generates elastic deformation presses against the side wall of the receiving cavity, and the other end of the elastic member 14 that generates elastic deformation presses against the locking member 6; a cover plate 15, which is threadedly connected to the main body 13.

[0036] The accommodating cavity is used to accommodate the locking member 6 and the elastic member 14, and provide guidance for the movement of the locking member 6 to prevent the locking member 6 from being stuck in the locking seat 5. The elastic member 14 is preferably a spring, and the cover plate 15 is used to facilitate the installation of the locking member 6 and the elastic member 14 in the locking seat 5.

[0037] Furthermore, a third inclined surface 16 is provided on the clamping member 7, and a fourth inclined surface 17 is provided on the locking member 6. The third inclined surface 16 and the fourth inclined surface 17 are movably abutted against each other.

[0038] When the injection mold is closed and the clamping part 7 is inserted into the locking seat 5 so that the clamping part 7 and the locking part 6 are clamped with each other, the third inclined surface 16 on the clamping part 7 first pushes the locking part 6 to move in the locking seat 5 through the fourth inclined surface 17 on the locking part 6, so that the through-portion 9 moves to the top of the clamping part 7, making way for the movement of the clamping part 7.

[0039] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the scope defined by the spirit of the present invention.

Claims

1. A die drawing mechanism for an injection mold, wherein the injection mold has a fixed mold assembly and a movable mold assembly that are movably matched, the fixed mold assembly has a first fixed seat and a first movable plate that is movably matched with the first fixed seat, and the movable mold assembly has a second fixed seat and a second movable plate that is movably matched with the second fixed seat, and the die drawing mechanism is used to keep the first movable plate and the second movable plate fixed first and then separate from each other when the fixed mold assembly is separated from the movable mold assembly, characterized in that: The die drawing mechanism comprises: A locking seat, which is fixed on the outer side wall of the first movable plate; A locking member, which is movably arranged in the locking seat along a direction perpendicular to the direction from the fixed mold assembly to the movable mold assembly; A clamping member, one end of which is fixedly arranged on the outer side of the second movable plate, and the other end of which is inserted into the locking seat and movably clamped with the locking member; An unlocking member, one end of which is fixedly mounted on the outer side wall of the first fixing seat, and the other end of which is movably inserted into the locking seat and movably abuts against the locking member; The locking member can be engaged with the engaging member, so that when the movable mold assembly is separated from the fixed mold assembly, the first movable plate and the second movable plate are fixed, and when the first fixing seat is separated from the first movable plate and one end of the unlocking member is driven away from the locking seat, the engaging state with the engaging member is disengaged, and the first movable plate and the second movable plate are in a separable state.

2. A die drawing mechanism for an injection mold according to claim 1, characterized in that: The locking member is provided with a through portion which penetrates through the wall thickness of the locking member in a direction parallel to the direction from the movable mold assembly to the fixed mold assembly, and the clamping member extends outward to form a clamping portion which passes through the through portion and is movably clamped with the end face of the locking member.

3. A die drawing mechanism for an injection mold according to claim 1, characterized in that: A first inclined surface is arranged on a side of the locking member facing the unlocking member, and a second inclined surface is arranged on a side of the unlocking member facing the locking member. The first inclined surface movably abuts against the second inclined surface.

4. A die drawing mechanism for an injection mold according to claim 1, characterized in that: The locking seat comprises: A main body, wherein a receiving cavity is provided in the main body, and the locking member is movably provided in the receiving cavity; An elastic member, which is arranged in the accommodating cavity, wherein one end of the elastic member that generates elastic deformation is pressed against the side wall of the accommodating cavity, and the other end of the elastic member that generates elastic deformation is pressed against the locking member; A cover plate is threadedly connected to the main body.

5. A die drawing mechanism for an injection mold according to claim 1, characterized in that: The clamping member is provided with a third inclined surface, the locking member is provided with a fourth inclined surface, and the third inclined surface movably abuts against the fourth inclined surface.

6. An injection mold, characterized in that: It comprises a die drawing mechanism for an injection mold as described in any one of claims 1 to 5.

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