CN216914718U - High-precision injection mold for pipe mechanism - Google Patents

Abstract

The utility model discloses a high-precision injection mold for a pipe mechanism, which comprises a front mold component, a rear mold component and a mold core component, wherein the front mold component is arranged on the front side of the front mold component; the mold core assembly comprises a front mold core plate and a rear mold core plate, and the front mold core plate and the rear mold core plate cover to form an injection molding cavity; the rear mould core plate is fixedly arranged on the rear mould core plate, the ejection mechanism is arranged between the rear mould core plate and the rear mould assembly and comprises a push plate and push rods, the push plate is movably arranged on the rear mould core plate, the rear side of the push plate is in transmission connection with at least one push rod, and the push rods are driven to drive the push plate to move forwards so that the tubular product formed on the forming column can be separated from the rear mould core plate. The ejector plate is pushed out by the push plate aiming at the demoulding of the tubular product, so that the tubular part does not need to be pushed out by the ejector sleeve, and the conditions that the ejector sleeve is too long and is broken, movement is blocked and normal demoulding of the product is influenced are avoided.

Description

High-precision injection mold for pipe mechanism

Technical Field

The utility model relates to the technical field of molds, in particular to a high-precision injection mold for a pipe mechanism.

Background

Injection molding is a processing method used in mass production of some parts, and comprises the specific steps of injecting a material melted by heating into a mold cavity, and obtaining a molded product after cooling and solidification. The injection mold is a tool used for injection molding, and the product member molding process in modern manufacturing industry almost needs to be completed by using the mold.

In this field, when an injection-molded product has at least a tubular body, in the prior art, a plurality of ejector mechanisms are generally arranged at a plurality of positions of the product, and the product is demolded by a one-step ejection method of the ejector mechanisms, but the method has the following defects:

firstly, a plurality of ejector sleeves need to be arranged according to different parts of a product, and when a plurality of products are simultaneously demoulded, the number of ejector sleeve mechanisms is too large, so that the manufacturing cost is increased, and the arrangement and installation of the ejector sleeve mechanisms are complex;

secondly, the length of the ejector mechanism in the same injection mold is generally fixed, the length of the ejector mechanism cannot be adjusted according to different lengths of different parts of the product, and in order to ensure the demolding effect of the injection molded product, the length of the ejector mechanism needs to be set according to the length of the longest part of the product, so that the ejector mechanism is too long, the phenomenon of ejector breakage is easy to occur, the service life of the mold is shortened, and the like;

thirdly, when the ejector sleeve is used for injection molding of a product with a tubular body, the problem that the product defect is easily caused in the injection molding of the high-precision tubular body product due to unsmooth discharge of pressure gas of the injection molding product is solved.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a high-precision injection mold for a pipe mechanism, which is used for solving at least one technical problem.

The utility model is realized by adopting the following technical scheme:

the utility model provides a high-precision injection mold for a pipe mechanism, wherein a product for injection molding at least has a tubular body; the mold comprises a front mold component, a rear mold component and a mold core component positioned between the front mold component and the rear mold component; the mold core component comprises a front mold core plate and a rear mold core plate, the front mold core plate and the rear mold core plate are covered to form an injection molding cavity, and one side facing the front mold component is defined as a front side, and one side facing the rear mold component is defined as a rear side;

the rear mould core plate is fixedly arranged on the rear mould core plate, the ejection mechanism is arranged between the rear mould core plate and the rear mould assembly and comprises a push plate and push rods, the push plate is movably arranged on the rear mould core plate, the rear side of the push plate is in transmission connection with at least one push rod, and the push rods are driven to drive the push plate to move forwards so that the tubular product formed on the forming column can be separated from the rear mould core plate.

In order to facilitate the movement of the push rod, the rear mold assembly comprises a rear mold base plate and a movable plate movably arranged on the rear mold base plate, the rear side of the push rod is connected with the movable plate, and the movable plate drives the push rod to move forwards so as to separate the tubular body of the product from the rear mold core plate.

Preferably, the tubular body of the product comprises a long pipe and a short pipe, the ejection mechanism further comprises an ejector sleeve, the long pipe is formed on the forming column, the short pipe is formed on the ejector sleeve, the ejector sleeve is arranged on the rear mold core plate, and the short pipe of the product is separated from the rear mold core plate by driving the ejector sleeve to move forward.

Wherein, in order to guarantee the drawing of patterns effect of the nozzle stub of product, department's section of thick bamboo has department's section of thick bamboo inner needle and department's section of thick bamboo socle, department's section of thick bamboo inner needle is fixed locate back mould core board with between the back mould bedplate, the nozzle stub of product is formed at department's section of thick bamboo inner needle is last, department's section of thick bamboo socle movable sleeve is located on the department's section of thick bamboo inner needle, department's section of thick bamboo socle rear side with the fly leaf is connected, through the fly leaf drive department's section of thick bamboo with the push rod moves forward in step so that the nozzle stub and the long tube of product break away from in step back mould core board.

In order to ensure the uniform discharge of gas in the injection molding process of a product, the forming column comprises a forming section at the front end and a connecting section at the rear end, and an exhaust passage is spirally formed in the connecting section of the forming column.

Wherein, preferably, the outer wall of the connecting section is concave downwards to form an exhaust passage.

Wherein, in order to guarantee that the product can cool off the shaping fast after moulding plastics, the inside first cold water passageway that is equipped with of shaping post, be equipped with first cold water pipeline on the back die core board, first cold water passageway with first cold water pipeline intercommunication.

Wherein, in order to guarantee that the product can cool off the shaping fast after moulding plastics, department section of thick bamboo inner needle is inside to be equipped with second cold water passageway, be equipped with second cold water pipeline on the back die block board, second cold water passageway with second cold water pipeline intercommunication.

Wherein, for guaranteeing the direction effect of push rod, the push rod with the one end of push pedal contact is provided with the uide bushing and leads the push pedal.

Wherein, preferably, the guide sleeve is a copper sleeve.

After the scheme is adopted, the utility model at least has the following beneficial effects:

firstly, the push plate can be provided with tubular bodies of a plurality of products, the push plate is driven by the push rod to move upwards to synchronously drive the products to be separated from the rear mold core plate, so that mold components are reduced, the production cost is reduced, the installation is convenient, and the assembly cost is reduced;

second, the mode that adopts push pedal and push rod to combine compares in the ejecting mode of department's section of thick bamboo structure, can avoid department's section of thick bamboo length overlength, and the intensity variation appears department's section of thick bamboo fracture, and the motion jamming, the product breaks away from the not good problem of effect.

And thirdly, the exhaust channel can be spirally arranged on the forming column, so that gas can be smoothly discharged in the forming process, and the generation of defective products is reduced.

The utility model is described in further detail below with reference to the figures and the specific embodiments.

Drawings

FIG. 1 is a schematic view showing the structure of an injection molded product;

FIG. 2 is a schematic perspective view of an injection mold according to an embodiment;

FIG. 3 is a front view of the injection mold of the embodiment in which a part of the structure is hidden;

FIG. 4 is a sectional view showing the injection mold in a clamped state in the embodiment;

FIG. 5 is a schematic structural view of a forming column in the embodiment;

FIG. 6 is a schematic structural view of a cartridge according to an embodiment;

FIG. 7 is a schematic perspective view of the push plate, push rod and forming needle in the embodiment.

Detailed Description

To further illustrate the various embodiments, the utility model provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

Meanwhile, the directions such as front, rear, left, and right are only referred to as a reference direction in the present embodiment, and do not represent directions in actual use.

The utility model will now be further described with reference to the accompanying drawings and detailed description.

The embodiment provides an injection mold of a high-precision pipe mechanism, and referring to fig. 2 to 7, the injection mold comprises a front mold component 11, a rear mold component 13 and a mold core component 12, wherein the front mold component 11 and the rear mold component 13 are arranged in sequence from front to back and can move relatively; the core assembly 12 includes a front core plate 121 and a rear core plate 122, the front core plate 121 and the rear core plate 122 cover to form an injection molding cavity, and a product is formed in the injection molding cavity. Specifically, the front mold assembly 11 includes a face plate 111 and a thermal flow plate 112 sequentially arranged from the front end to the rear end, a gate 113 is provided on the face plate 112, a plurality of injection molding runners are provided in the thermal flow plate 112, the injection molding runners are connected with the front mold core plate 121 and the gate 113, and the molten plastic extruded by the plastic extruder flows into the injection molding runners through the gate 113 and enters an injection molding cavity formed by the front mold core plate 121 and the rear mold core plate 122, and is solidified and molded after cooling. An ejection mechanism 14 is arranged between the rear mold core plate 122 and the rear mold assembly 13; the rear mold assembly 13 comprises a rear mold base plate 131 and a movable plate 132 movably arranged on the rear mold base plate 131; the movable plate 132 drives the ejection mechanism 14 to move so as to drive the ejection mechanism 14 to separate the injection molding product in the injection molding cavity; of course, in other embodiments, the specific structure of the front mold assembly 11 and the rear mold assembly 13 is not limited thereto. In the present embodiment, the direction of the injection mold in the use state of being fixedly placed on the ground is taken as the description direction, that is, the side facing the front mold assembly 1 is the front side, and the side facing the rear mold assembly is the rear side.

The ejection mechanism 14 comprises a push plate 141 and push rods 142, the push plate 141 is movably arranged on the rear mold core plate 122, and the rear side of the push plate 141 is in transmission connection with at least one push rod 142; at least one molding column 144 is fixed on the rear core plate 122, tubular bodies of a plurality of products are formed on the push plate 141 through the molding column 144 and the front core plate 121, and the push rod 142 is driven to drive the push plate 141 to move forward so that the products with the tubular bodies are separated from the rear core plate 122. Compared with the prior art, aiming at each product with a tubular body, a plurality of ejector structures are required to be arranged according to different parts of the product, the length of each ejector structure is a fixed size, and in order to ensure the demolding effect of the product, the ejector structures are required to be arranged according to the length of the longest part of the product; the ejector sleeve needs to simultaneously act to eject the products, and the utility model adopts a mode that the push plate 141 is driven by the push rod 142 to move forward to synchronously drive the products to be demolded, so that the number of die components can be reduced, the installation mode is simple, and the production and assembly cost is reduced; the push rod 142 does not need to be arranged according to the length of the longest part of the product, the length of the push rod 142 is moderate, the possibility of breakage of the push rod 142 is reduced, and the separation effect of the product is guaranteed.

The injection molding product in this embodiment is exemplified by the injection molding product shown in fig. 1, such as a nucleic acid reagent tube, a virus detection reagent tube, and the like, the tubular body of the injection molding product 10 has a long tube 101 and a short tube 102, the height difference between the long tube 101 and the short tube 102 is large, the bottom surfaces of the long tube 101 and the short tube 102 are located on the same horizontal plane, the distance between the two is small, the overall length range of the injection molding product is 10mm-150mm, and the requirement on the precision of injection molding is high.

Specifically, a groove is formed in the front plane of the rear mold core plate 122, the push plate 141 and the groove have the same size and shape, the push plate 141 is movably disposed in the groove of the rear mold core plate 122, a plurality of through holes are formed in the position of the rear plane of the rear mold core plate 122 corresponding to the push plate 141, the front section of the push rod 142 passes through the through holes to be connected with the push plate 141, the rear side of the push rod 142 is connected with the movable plate 132, the push rod 142 is driven to move forward by the movable plate 132 to drive the push plate 141 to move forward and separate from the groove of the rear mold core plate 122, and the assembly manner of the push rod 142 and the push plate 141 is simple and convenient. A guide sleeve 1421 is arranged at one end of the push rod 142 connected with the push plate 141 for guiding; specifically, uide bushing 1421 is the copper sheathing, and the hardness is higher, can guarantee push rod 142's guide effect, guarantees the perpendicular of injection moulding product front and back direction, realizes the smooth drawing of patterns of product.

As shown in fig. 7, a plurality of through holes are formed in the push plate 141, the forming column 144 includes a forming section at the front end and a connecting section at the rear end, the connecting section of the forming column 144 is vertically fixed in the through holes, the long tube 101 of the injection molding product is formed on the forming section of the forming column, that is, the long tube channel formed on the front mold core plate 121 is inserted into the forming section of the forming column 144, and a gap between the two is the long tube 101 of the injection molding product; a first cold water channel 145 is formed inside the forming column 144, a first cold water pipeline (not shown) is formed on the rear core plate 122, and the first cold water channel 145 is communicated with the first cold water pipeline, so that an injection-molded product can be rapidly cooled and formed. The long tubes 101 of the plurality of products are formed on the push plate 141 through the forming posts 144, so that the push rod 142 drives the push plate 141 to move forward, and the long tubes 101 of the plurality of products can be synchronously driven to be simultaneously separated from the rear core plate 122 and the forming posts 144 on the rear core plate 122.

In the prior art, a product is demoulded by adopting a manner of ejecting an ejector sleeve, the product is formed at the front end of the ejector sleeve structure, when the height of a tubular body of an injection molding product 10 is too high, redundant gas is difficult to be rapidly discharged from the rear end in the injection molding process, the molding of the injection molding product can be influenced, and the molding effect of the injection molding product is poor. In this embodiment, in order to ensure that air can be uniformly discharged in the injection molding process, as shown in fig. 5, the forming column 144 is spirally provided with an exhaust passage 1441 on the connecting section, so as to enlarge the exhaust area of the forming column 144, so that air in the injection molding process can be uniformly discharged from the exhaust passage, and the molding effect of the injection molded product is ensured; to further ensure the exhaust effect, the exhaust passage 1441 is formed by recessing the outer wall of the connecting section of the forming pillar 144. In other embodiments, the specific structure of the exhaust passage 1441 is not limited thereto.

In this embodiment, since the distance between the long pipe 101 and the short pipe 102 of the injection molded product is small, the short pipe 102 of the injection molded product is formed on the sleeve 143 as a preferred embodiment of the present invention. Of course, in other embodiments, if the distance between the long pipe 101 and the short pipe 102 of the injection molding product is large or the injection molding product is a single pipe, the pipe is formed on the push plate 141 through the channels of the forming post 144 and the front core plate 121 and is ejected by combining the push rod 142 and the push plate 141 without using the ejector 143 as the forming mechanism and the ejecting mechanism. However, in this embodiment, the long tube 101 of the injection molding product is ejected by the push plate 141 and the push rod 142, and the short tube 102 of the injection molding product is ejected by the ejector 143, so that the ejector 143 occupies a small space, and the rear section of the ejector 143 can be disposed at other positions of the rear mold assembly 13, thereby facilitating assembly.

Specifically, a guide insertion hole penetrating through the front and rear parts is further formed in the rear mold core plate 122, the ejector 143 penetrates through the guide insertion hole, the ejector 143 is provided with an ejector inner needle 1431 and an ejector sleeve column 1432, the ejector inner needle 1431 is fixedly arranged between the rear mold core plate 122 and the rear mold base plate 131, the ejector inner needle 1431 penetrates through the guide insertion hole and the movable plate 132 of the rear mold core plate 122 and is fixedly arranged on the rear mold base plate 131, a second cold water channel 146 is arranged inside the ejector inner needle 1431, a second cold water pipeline (not shown in the drawing) is arranged in the rear mold base plate 131, and the second cold water channel 146 is communicated with the second cold water pipeline, so that the short pipe 102 of the product can be rapidly cooled and formed after being injection molded.

The ejector sleeve column 1432 is movably sleeved on the ejector sleeve inner needle 1431, and the ejector sleeve column 1432 passes through the guide insertion hole of the rear mold core plate 122 and is connected with the movable plate 132; the front end face of the ejector sleeve column 1432 is lower than the ejector inner needle 1431, the short pipe 102 of the product is formed at the front side of the ejector inner needle 1431, namely, a short pipe channel formed on the front mold core plate 121 is inserted into the ejector inner needle 1431, and a gap between the short pipe and the ejector inner needle 1431 is the short pipe 102 of the injection molding product; during demolding, the moving plate 132 drives the ejector sleeve column 1432 to move forward, so that the front section of the ejector sleeve column 1432 protrudes out of the ejector sleeve inner needle 1431, the ejector sleeve column 1432 ejects the product short tube located on the ejector sleeve inner needle 1431, and finally the product short tube 102 is separated from the rear mold core plate 122 and the ejector sleeve inner needle 1431 on the rear mold core plate 122. In this embodiment, the ejector sleeve 143 adopts the mechanism of the ejector sleeve inner needle 1431 and the ejector sleeve column 1432, so that the overall strength of the ejector sleeve 143 is enhanced, the short tube 102 of the product is short, the overall height of the ejector sleeve 143 cannot be overlong, the phenomenon of breakage of the ejector sleeve 143 is reduced, the working stability of the mold is further ensured, and the ejector sleeve 143 has a simple structure, low cost and convenient installation. Meanwhile, in this embodiment, the rear section of the sleeve column 1432 and the rear section of the push rod 142 are in transmission connection with the same movable plate 132, and the movable plate 132 drives the long pipe 101 and the short pipe 102 to move forward, so as to ensure that the long pipe 101 and the short pipe 102 of the product synchronously move and separate from the rear core plate 122.

In this embodiment, the movable plate 132 abuts against the rear mold seat plate 131, the push plate 141 is clamped on the rear mold core plate 122 to serve as a first state (initial state) of the injection mold, the movable plate 132 drives the forward movement, and the movable plate 132 is separated from the rear mold core plate 122 to serve as a second state of the injection mold. In other applications, the first state and the second state of the movable plate 132 and the push plate 141 can be interchanged.

The specific demolding process of the injection product of the injection mold is as follows: when the mold is closed, the front mold core plate 121 and the rear mold core plate 122 are covered to form an injection molding cavity, the long pipe 101 of the product is formed on the molding column 144, and the short pipe 102 of the product is formed on the inner needle 1431 of the ejector sleeve; when the mold is opened, the external driving source drives the front mold assembly 11 and the rear mold core plate 122 to move forward, so that the front mold core plate 121 is separated from the rear mold core plate 122, and an injection product is exposed; then the external power source drives the movable plate 132 to move forward to drive the push rod 142 and the sleeve column 1432 to move forward, the push rod 142 moves forward to drive the push plate 141 to move forward, so that the long tubes 101 of the multiple products on the push plate 141 can move forward relative to the forming column 144, and finally the long tubes 101 of the injection products are separated from the rear mold core plate 122 and the forming column 144; meanwhile, the ejector sleeve column 1432 moves forward to eject the product short pipe 102 on the ejector inner needle 1431, so that the product short pipe 102 is separated from the rear mold core plate 122 and the ejector inner needle 1431, and the product demolding is completed in the above process. When the die is closed again, the movable plate 132 falls back to the initial position, and drives the push rod 142, the push plate 141 and the sleeve column 1432 to return to the initial state, so that the die is ejected and returned in a reciprocating manner, the die production is facilitated to a great extent, and the product yield is improved.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. A high-precision injection mold for a pipe mechanism is used for injection molding of products at least provided with a tubular body; the method is characterized in that: the die comprises a front die assembly, a rear die assembly and a die core assembly positioned between the front die assembly and the rear die assembly; the mold core component comprises a front mold core plate and a rear mold core plate, the front mold core plate and the rear mold core plate are covered to form an injection molding cavity, and one side facing the front mold component is defined as a front side, and one side facing the rear mold component is defined as a rear side;

the rear mould core plate is fixedly arranged on the rear mould core plate, the ejection mechanism is arranged between the rear mould core plate and the rear mould assembly and comprises a push plate and push rods, the push plate is movably arranged on the rear mould core plate, the rear side of the push plate is in transmission connection with at least one push rod, and the push rods are driven to drive the push plate to move forwards so that the tubular product formed on the forming column can be separated from the rear mould core plate.

2. The injection mold of the high-precision pipe mechanism according to claim 1, wherein: the rear die assembly comprises a rear die base plate and a movable plate movably arranged on the rear die base plate, the rear side of the push rod is connected with the movable plate, and the movable plate drives the push rod to move forwards so as to enable the tubular body of the product to be separated from the rear die core plate.

3. The injection mold of a high-precision pipe mechanism according to claim 2, wherein: the tubular body of the product comprises a long pipe and a short pipe, the ejection mechanism further comprises a sleeve, the long pipe is formed on the forming column, the short pipe is formed on the sleeve, the sleeve is arranged on the rear mold core plate, and the sleeve is driven to move forwards so that the short pipe of the product is separated from the rear mold core plate.

4. The injection mold of the high-precision pipe mechanism according to claim 3, wherein: the ejector sleeve is provided with an ejector sleeve inner needle and an ejector sleeve column, the ejector sleeve inner needle is fixedly arranged between the rear mold core plate and the rear mold seat plate, a short tube of a product is formed on the ejector sleeve inner needle, the ejector sleeve column is movably sleeved on the ejector sleeve inner needle, the rear side of the ejector sleeve column is connected with the movable plate, and the ejector sleeve and the push rod are driven by the movable plate to synchronously move forwards so that the short tube and the long tube of the product are synchronously separated from the rear mold core plate.

5. The injection mold of the high-precision pipe mechanism according to claim 1, wherein: the forming column comprises a forming section at the front end and a connecting section at the rear end, and an exhaust passage is spirally formed in the connecting section of the forming column.

6. The injection mold of the high-precision pipe mechanism according to claim 5, wherein: the outer wall of the connecting section is concave downward to form an exhaust passage.

7. The injection mold of the high-precision pipe mechanism according to claim 1, wherein: the inner part of the forming column is provided with a first cold water channel, the rear core plate is provided with a first cold water pipeline, and the first cold water channel is communicated with the first cold water pipeline.

8. The injection mold of the high-precision pipe mechanism according to claim 4, wherein: the inner part of the ejector sleeve inner needle is provided with a second cold water channel, a second cold water pipeline is arranged on the rear die base plate, and the second cold water channel is communicated with the second cold water pipeline.

9. The injection mold of the high-precision pipe mechanism according to claim 1, wherein: and one end of the push rod, which is in contact with the push plate, is provided with a guide sleeve for guiding the push plate.

10. The injection mold of a high-precision pipe mechanism according to claim 9, wherein: the guide sleeve is a copper sleeve.

Images