CN221339388U - Injection mold for glue entering thin wall - Google Patents

Abstract

The utility model discloses an injection mold for manufacturing a hollow tubular product by injecting glue into the inner side of a thin wall, wherein the product is provided with the thin wall, the injection mold comprises a mold frame and a mold core, the mold core is arranged in the mold frame, the mold frame is provided with an injection runner, and the injection runner is communicated with a molding cavity of the mold core; the injection runner comprises a glue injection nozzle and a pouring gate, and the glue injection nozzle is assembled on a top plate of the die carrier so as to be communicated with the injection machine; the pouring gate is arranged in the die carrier and is communicated with the forming cavity; the pouring gate is a J-shaped pouring gate, and the tail end of the pouring gate is communicated with the forming cavity from the inner side of the thin wall of the product and is used for injecting glue solution. The ripple phenomenon is greatly reduced, so that the technical problem existing in the prior art is solved, the processing cost of the product is reduced, and the manufacturing quality of the product is improved.

Description

Injection mold for glue entering thin wall

Technical Field

The utility model relates to the field of injection molds, in particular to an injection mold with thin-wall inner side glue.

Background

The product A shown in the figures 1-2 is hollow and tubular in shape and uniform in inner diameter, and the cross section of the product A is similar to a triangle shape after being sectioned along the radial direction, wherein one side wall is thin, namely a thin wall A3, and the rest side walls are thick, namely a thick wall A2; in other words, the product a is formed by integrally connecting a thin wall A3 and a thick wall A2, the thin wall is provided with a plurality of through holes, any through hole is the product hole A1, the wall thickness of the thin wall of the product a gradually increases or decreases along the axial direction of the product a, and the thinnest wall thickness of the thick wall A2 is greater than the wall thickness of the thin wall A3.

In order to manufacture the product A as set forth above, a disposable injection molding processing is selected, a matched mold is used, in the mold design process, a product hole A1 is formed in the thin wall, a gate for injection molding of the product A is generally selected on the thick wall, the gate for injection molding of the thick wall is a linear gate arranged along the mold opening direction, the gate has a space larger than that of the thin wall, glue solution is accumulated in a molding cavity of the thick wall A2, product ripple is caused, meanwhile, the flowing of the glue solution is influenced, the glue feeding can not be effectively and uniformly carried out, the quality of the product A is directly influenced, unqualified improvement is caused, and the processing cost is greatly improved.

Therefore, how to improve and design the mold structure to avoid the above-mentioned adverse effects is one of the technical problems that a person skilled in the art needs to solve.

Disclosure of utility model

In order to solve the technical problems in the prior art, the utility model aims to provide an injection mold for thin-wall inner side glue.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

An injection mold for manufacturing a hollow tubular product is provided with a thin wall, the injection mold comprises a mold frame and a mold core, the mold core is arranged in the mold frame, the mold frame is provided with an injection runner, and the injection runner is communicated with a molding cavity of the mold core;

the injection runner includes injecting glue mouth and runner, wherein:

the glue injection nozzle is assembled on the top plate of the mould frame so as to be communicated with the injection machine;

the pouring gate is arranged in the die carrier and is communicated with the forming cavity;

The pouring gate is a J-shaped pouring gate, and the tail end of the pouring gate is communicated with the forming cavity from the inner side of the thin wall of the product and is used for injecting glue solution.

Further preferred is: the die carrier is assembled with a first core-pulling mechanism and a first sliding rail, wherein the first core-pulling mechanism comprises a first sliding block and a forming supporting column, and the first sliding block is arranged on the die carrier, wherein:

the first sliding block is in sliding connection with the first sliding rail;

the first sliding block is connected with the forming support column and synchronously performs core pulling displacement;

the core-pulling support column is provided with a through hole, and the through hole is the end section of the J-shaped pouring gate.

Further preferred is: the inner diameter of the J-shaped gate is gradually reduced along the injection direction.

Further preferred is: the first sliding block is inserted with an inclined rod, and the inclined rod is connected with an upper die plate of the die carrier and is driven to move by the upper die plate.

Further preferred is: the die carrier is also provided with a second core pulling mechanism and a second sliding rail;

The second core pulling mechanism is in sliding connection with the second sliding rail, and the second sliding rail is driven by an ejection mechanism of the die carrier to carry out ejection displacement along the die opening direction.

Further preferred is: the second core-pulling mechanism comprises a core-pulling oil cylinder, a second sliding block and a core, wherein:

the second sliding block is in sliding connection with the second sliding rail;

the core pulling oil cylinder is connected with the second sliding block and drives the second sliding block to slide and displace along the direction of the second sliding rail;

The core is connected with the second sliding block and synchronously displaces with the second sliding block.

Further preferred is: the core is propped against the forming propped column and is inserted and positioned.

After the technical scheme is adopted, compared with the background technology, the utility model has the following advantages:

the utility model designs the J-shaped pouring gate, bypasses the forming cavity of the thick wall and is communicated with the forming cavity of the thin wall, thereby realizing glue feeding from the forming cavity of the thin wall, extruding the glue solution continuously to the thick wall for cooling forming because the forming cavity of the thin wall is consistent with the thin wall of the product and has the characteristic of consistent thickness, enabling the glue solution to enter the forming cavity of the die from the pouring gate, effectively extruding the glue solution on the side surface of the thin wall, preventing the glue solution from being remained and accumulated, greatly reducing the ripple phenomenon, solving the technical problems existing in the prior art, reducing the processing cost of the product and improving the manufacturing quality of the product.

Drawings

FIG. 1 is a schematic perspective view of a product structure;

FIG. 2 is a schematic view of the structure of one end of the product;

FIG. 3 is a schematic structural view of an injection mold with thin-wall inner side glue according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a part of an injection mold with a thin-wall inner side adhesive according to an embodiment of the present utility model;

FIG. 5 is a schematic perspective view of a second core-pulling mechanism according to an embodiment of the present utility model;

fig. 6 is a schematic perspective view of a lower mold core according to an embodiment of the present utility model.

The reference numerals in the above description are as follows:

A. A product; a1, product holes; a2, thick wall; a3, thin wall;

110. A top plate; 120. a backing plate; 130. an upper template; 140. a glue injection nozzle; 150. j-shaped gate;

210. A bottom plate; 220. an ejector plate group; 230. a lower template;

310. an upper mold core; 320. a lower mold core; 321. a lower mold core pin;

410. A diagonal rod; 420. a first slider; 430. core pulling and column supporting;

510. a second slider; 520. a core; 530. a stripper plate; 540. and a second slide rail.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It should be noted that, in the present utility model, terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element of the present utility model must have a specific orientation, and thus should not be construed as limiting the present utility model.

Examples

The utility model discloses an injection mold for glue entering the inner side of a thin wall, which is provided with a J-shaped pouring gate, bypasses a molding cavity of the thick wall A2 and is communicated with the molding cavity of the thin wall A3, so that glue entering from the molding cavity of the thin wall A3 is realized, the molding cavity of the thin wall A3 and the thin wall A3 of a product A keep consistent and have the characteristic of consistent thickness, continuous glue solution is extruded to the thick wall A2 for cooling molding, the glue solution enters the molding cavity of the mold from the pouring gate and is effectively extruded from the side surface of the thin wall A3, the glue solution is not reserved and accumulated, the ripple phenomenon is greatly reduced, the technical problem existing in the prior art is solved, the processing cost of the product A is reduced, and the manufacturing quality of the product A is improved.

As shown in fig. 3 to 5, the mold includes a mold frame and a mold core, and the mold core is installed in the mold frame. The die carrier comprises an upper die set and a lower die set, wherein the upper die set comprises a top plate 110, a base plate 120 and an upper die plate 130 which are sequentially connected, and a groove is formed in one side of the upper die plate 130, facing the lower die set; the lower die set comprises a bottom plate 210, square irons and a lower die plate 230 which are sequentially connected, wherein the two square irons are symmetrically distributed and fixedly connected with the bottom plate 210, the lower die plate 230 is fixedly connected with the two square irons, and the lower die plate 230 is provided with a groove towards the upper die plate 130. The mold core comprises an upper mold core 310 and a lower mold core 320, wherein the upper mold core 310 is embedded into a groove formed in the upper mold plate 130 and is provided with a molding cavity, the lower mold core 320 is arranged in the groove formed in the lower mold plate 230 and is fixedly connected with the lower mold plate 230, the lower mold core 320 is provided with the groove and a molding groove, and the upper mold core 320 and the lower mold core 320 are mutually buckled to obtain the molding cavity for molding the product A.

It should be noted that: the molding groove formed in the upper mold core 310 corresponds to the thick wall A2 of the molded product a, and the molding groove formed in the lower mold core 320 corresponds to the thin wall A3 of the molded product a.

As shown in fig. 3 to 5, the lower mold core 320 is provided with a lower mold core pin 321 formed corresponding to the hole of the product a. Specific: the lower mold core 320 is disposed in the lower mold plate 230, and a plurality of through pinholes are formed along the mold opening direction, the lower mold core pins 321 are inserted into the pinholes, in this embodiment, the pinholes are disposed along the core pulling direction, and a plurality of pinholes are arranged in a line shape at intervals. The lower mold core 320 is further provided with a plurality of molding pins on both sides of the pin hole, and the molding pins are arranged in a shape required by the product a.

As shown in fig. 3 to 5, the upper module further includes a glue injection nozzle 140 and a gate opened with the glue injection nozzle 140, the glue injection nozzle 140 is assembled on the top plate 110, and the glue injection nozzle 140 is communicated with the molding cavity through the gate. Specific: in this mould structure, the thick wall A2 of product A is compared in thin wall A3 and is close to advance gluey mouth in the design, and product A requires the surface smooth in order to carry out the processing operation in succession simultaneously, therefore product A advances the runner that gluey used can not design at product A's surface, and then this embodiment, the runner design is the runner of similar J font, i.e. J shape runner 150, the top and the injecting glue mouth 140 intercommunication of J shape runner 150 and to bypass product A's shaping chamber, communicate with the department that corresponds product A inside wall, thereby with the glue solution introduction shaping chamber.

Detailed: as shown in fig. 3, the J-shaped gate 150 includes a straight line segment, an arc segment and an inclined segment, wherein the straight line segment is connected with each other, and the straight line segment is axially arranged along the mold opening direction, and is a through segment penetrating through the upper mold plate 130; one end of the arc section is communicated with the straight line section, the other end of the arc section is bent towards the forming cavity, and a distance is reserved between the other end of the arc section and the forming cavity, namely: the circular arc section is not communicated with the forming cavity; one end of the inclined section is communicated with the circular arc section, and the other end of the inclined section is inserted into the side surface corresponding to the inner side wall of the product A from the inclined direction, namely the inner side surface corresponding to the thin wall A3 of the product A is filled with the travelling glue. It should be noted that: the inner diameter of the J-shaped gate 150 is gradually reduced along the axial direction (i.e., the injection direction of the glue solution) to increase the injection pressure, thereby ensuring that the glue solution can be filled in the molding cavity.

As shown in fig. 3, the mold is further provided with two core-pulling mechanisms, wherein the two core-pulling mechanisms are a first core-pulling mechanism and a second core-pulling mechanism respectively, and the two core-pulling mechanisms are relatively displaced to core-pull, so that the product a is demolded.

What needs to be stated in advance is: as shown in fig. 3, the lower mold core 320 is fixed in the middle of the groove of the lower mold plate 230, a first sliding rail and a second sliding rail 540 are respectively disposed on two sides of the lower mold core 320, and the first sliding rail and the second sliding rail 540 are respectively connected with the first core pulling mechanism and the second core pulling mechanism.

As shown in fig. 3, the first core pulling mechanism includes a diagonal rod 410, a first slider 420 and a core pulling support column 430, the first slider 420 is slidably connected with the first slide rail, the slider is provided with a diagonal hole, the diagonal rod 410 is inserted into the diagonal hole, the end of the diagonal rod 410 is connected with the upper template 130, and drives the diagonal rod 410 to synchronously displace, the diagonal rod 410 that synchronously displaces drives the slider to slide along the first slide rail direction, the core pulling support column 430 is connected with the first slider 420, and performs core pulling displacement along with the displacement of the first slider 420, thereby completing core pulling of the product a. Obviously, the upper die set and the lower die set are mutually separated when the core pulling power of the first core pulling mechanism is sourced, namely: in the process that the upper die set is far away from the lower die set to perform die sinking displacement, the inclined rod 410 is utilized to drive the first sliding and drive the forming support column to perform core pulling displacement, and core pulling of the product A in the first step is completed.

It should be noted that: as shown in fig. 3 to 5, the end section of the J-shaped gate 150 is opened on the loose core supporting column 430, specifically: part of the inclined section, that is, the end section of the J-shaped gate 150 is opened on the loose core supporting column 430, and in the mold closing state, the end section of the J-shaped gate 150 corresponds to a specific side surface of the mold cavity, and the specific side surface corresponds to an inner side surface of the thin wall A3 of the product a.

As shown in fig. 3 to 5, the second core pulling mechanism includes a core pulling cylinder (not shown), a second slider 510, and a core 520, where the core pulling cylinder is fixedly connected with a second sliding rail through a cylinder frame, and an output shaft of the core pulling cylinder extends into a groove of the lower mold plate 230 along a second sliding rail 540, and is connected with the second slider 510, the second slider 510 is slidably connected with the second sliding rail 540, and the core 520 is connected with the second sliding rail 540. The core pulling power of the second core pulling mechanism is derived from a core pulling oil cylinder, an output shaft of the core pulling oil cylinder drives the second sliding block 510 to slide and displace along the direction of the second sliding rail 540, and the second sliding block 510 drives the core 520 to perform core pulling displacement. It should be noted that: the core 520 is inserted into the forming grooves of the upper and lower mold cores 320 and is matched with the upper and lower mold cores 320 to form the forming cavity, the end of the free end of the core 520 is provided with a bump, the free end of the forming support column is provided with a positioning groove, the core 520 and the forming support column are in supporting connection with each other, and the bump is inserted into the positioning groove.

As shown in fig. 3 to 5, due to the design requirement of the product a, any protrusion or dent can be provided on the surface of the product a to ensure the outer surface thereof to be smooth, so that the product a cannot be ejected by using the ejector pin.

As shown in fig. 3 to 5, the lower module further includes an ejector mechanism, the ejector mechanism includes an ejector plate set 220 and an ejector pin, the ejector plate set 220 is disposed between two square irons, and the ejector pin is connected with the ejector plate set 220 and is driven by the ejector plate set 220 to perform ejection displacement along the mold opening direction. Specific: the ejector pins penetrate through the lower die plate 230 to prop against the lower portion of the second core-pulling mechanism, and when the ejector plate set 220 is driven by the ejector cylinders to perform ejection displacement, the ejector pins synchronously drive the second core-pulling mechanism to perform ejection displacement, so that the ejector pins are separated from the lower die plate 230, and the product A is driven to be separated from the lower die core 320. Detailed: the ejector pins are fixed on the ejector plate group 220 and pass through the lower die plate 230 to be propped against the second sliding rail 540, so as to drive the second sliding rail 540 to perform ejection displacement, and the second core pulling mechanism is driven by the second sliding rail 540 to perform ejection displacement synchronously, so that the product A is separated.

According to the above, as shown in fig. 3 to 5, the product a separated from the lower core 320 is still on the core 520 of the second core-pulling mechanism, and after the core-pulling operation is completed by matching with the second core-pulling mechanism, the product a is released from the core 520. Specific: the second sliding block 510 and the core 520 are further provided with a stripper plate 530 therebetween, the stripper plate 530 and the second sliding rail 540 are locked and fixed, the stripper plate 530 and the second sliding rail 540 are relatively unintelligible, the stripper plate 530 is provided with a yielding through hole, an inner diameter gear of the yielding through hole allows the core 520 to move in and out along the core pulling displacement direction, and the inner diameter of the yielding through hole does not exceed the outer diameter of the product A. In other words: when the second slider 510 is driven to perform core pulling sliding, the core 520 is driven to be pulled out from the yielding through hole, but the displacement of the injection molded product a is limited by the stripper plate 530, at this time, the unconstrained core 520 continues to perform core pulling displacement, and is completely pulled out from the product a, so that the product a is completely demoulded.

As shown in fig. 1 to 5, the demolding process of the above mold is as follows:

Step one: opening the die, wherein the upper die set drives the upper die core 310 to move away from the lower die set;

Step two: the first sliding block 420 in the first core-pulling mechanism is driven by the upper die set through the inclined rod 410 to perform core-pulling displacement in a direction away from the lower die core 320, and when the first core-pulling mechanism performs core-pulling displacement, the formed supporting column is separated from the core 520 in the second core-pulling mechanism, so that the limitation on the core 520 is removed;

Step three: the second core pulling mechanism and the second sliding rail 540 are driven by the ejection mechanism to perform ejection displacement in a direction away from the lower mold core 320, the product a can be separated from the molding protruding pin of the lower mold core 320 and the lower mold core inserting pin 321, and the product a also is separated from the lower mold core 320;

Step four: in the second core pulling mechanism, a core pulling oil cylinder drives a second sliding block 510 to perform core pulling displacement in a direction far away from the product A, and the removed plate 530 and the moving core 520 after core pulling displacement are matched for removing materials, so that the product A is completely removed from the die.

It should be noted that: the outer surface of the product A is not provided with any pouring gate, and any ejector pin straight ejection mechanism is not adopted, so that the outer surface of the product A after ejection achieves the required smoothness requirement.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims (7)

1. An injection mold for the injection of a thin-walled, inner-side adhesive for the manufacture of a hollow tubular product having a thin wall, characterized in that: the injection mold comprises a mold frame and a mold core, wherein the mold core is arranged in the mold frame, the mold frame is provided with an injection runner, and the injection runner is communicated with a molding cavity of the mold core;

the injection runner includes injecting glue mouth and runner, wherein:

the glue injection nozzle is assembled on the top plate of the mould frame so as to be communicated with the injection machine;

the pouring gate is arranged in the die carrier and is communicated with the forming cavity;

The pouring gate is a J-shaped pouring gate, and the tail end of the pouring gate is communicated with the forming cavity from the inner side of the thin wall and is used for injecting glue solution.

2. The injection mold for thin-walled inner molding of claim 1, wherein: the die carrier is assembled with a first core-pulling mechanism and a first sliding rail, wherein the first core-pulling mechanism comprises a first sliding block and a forming supporting column, and the first sliding block is arranged on the die carrier, wherein:

the first sliding block is in sliding connection with the first sliding rail;

the first sliding block is connected with the forming support column and synchronously performs core pulling displacement;

the core-pulling support column is provided with a through hole, and the through hole is the end section of the J-shaped pouring gate.

3. The injection mold for thin-walled inner molding of claim 1, wherein: the inner diameter of the J-shaped gate is gradually reduced along the injection direction.

4. The injection mold for thin-walled inner molding of claim 2, wherein: the first sliding block is inserted with an inclined rod, and the inclined rod is connected with an upper die plate of the die carrier and is driven to move by the upper die plate.

5. The injection mold for thin-walled inner molding of claim 2, wherein: the die carrier is also provided with a second core pulling mechanism and a second sliding rail;

The second core pulling mechanism is in sliding connection with the second sliding rail, and the second sliding rail is driven by an ejection mechanism of the die carrier to carry out ejection displacement along the die opening direction.

6. The injection mold for thin-walled inner molding of claim 5, wherein: the second core-pulling mechanism comprises a core-pulling oil cylinder, a second sliding block and a core, wherein:

the second sliding block is in sliding connection with the second sliding rail;

the core pulling oil cylinder is connected with the second sliding block and drives the second sliding block to slide and displace along the direction of the second sliding rail;

The core is connected with the second sliding block and synchronously displaces with the second sliding block.

7. The injection mold for thin-walled inner molding of claim 6, wherein: the core is propped against the forming propped column and is inserted and positioned.