CN214448123U - Injection mould - Google Patents

Abstract

The utility model relates to an injection mold, include: a front mold assembly and a rear mold assembly. The front mold assembly includes: a front die holder and a front die core. The front die base is provided with a material injection pipe penetrating through the front die core. The front mold core is provided with a front molding groove. The rear mold assembly includes: the ejection mechanism comprises a base, a rear die holder, a rear die core, a push plate, a first ejection piece and a second ejection piece. The back die core is provided with a back forming groove which is arranged opposite to the front forming groove. The push plate is provided with a flow passage which is butted with the material injection pipe. One end of the flow passage extends from the inside to the outside to communicate with the rear molding groove. And the opening width of one end of the flow channel connected with the rear forming groove is smaller than the width of the rear forming groove. Above-mentioned injection mold sets up the push pedal of activity and cuts apart runner and product shaping chamber, adopts the ejecting mode of secondary, and the first is ejecting with product and mouth of a river and back mould benevolence drawing of patterns, utilizes the diving channel design of runner after that, and the secondary is ejecting separates product and mouth of a river to accomplish the drawing of patterns and the mouth of a river of product and handled continuously, reached the purpose that improves work efficiency.

Description

Injection mould

Technical Field

The utility model relates to a manufacturing and designing technical field moulds plastics, especially relates to an injection mold.

Background

An injection mold is a tool that presses a liquid material into a molding cavity to form a desired shape structure by injection molding. The injection mold has the advantages of high product forming speed, low processing difficulty and high working efficiency.

The defects of the traditional injection mold are that: since a runner through which a material flows needs to be provided in the injection mold, the product is connected to a nozzle formed in the runner after the product is molded. Therefore, after the product is demolded, a step of degating the product is required, which causes a decrease in work efficiency.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides an injection mold sets up the push pedal of activity and cuts apart runner and product shaping chamber, adopts the ejecting mode of secondary, and first time is ejecting with product and the interior drawing of patterns of mouth of a river and back mould benevolence, utilizes the diving channel design of runner after that, and the secondary is ejecting with product and mouth of a river separation to accomplish the drawing of patterns of product and remove the mouth of a river in succession and handle, reach the purpose that improves work efficiency.

An injection mold comprising:

a front mold assembly; the front mold assembly includes: the front die comprises a front die holder and a front die core arranged on the front die holder; the front die base is provided with a material injection pipe penetrating through the front die core; the surface of the front mold core is provided with a front molding groove; and

a rear mold assembly disposed parallel to the front mold assembly; the rear mold assembly includes: the ejection mechanism comprises a base, a rear die holder connected to the base, a rear die core installed on the rear die holder, a push plate arranged on the rear die core in a sliding manner, a first ejection piece connected between the rear die core and the push plate, and a second ejection piece penetrating into the push plate; the surface of the rear die core is provided with a rear molding groove which is arranged opposite to the front molding groove; the rear molding groove and the front molding groove jointly form a product molding cavity; the push plate is provided with a flow passage butted with the material injection pipe; one end of the flow channel extends from inside to outside to be communicated with the rear forming groove; the opening width of one end of the runner connected with the rear shaping groove is smaller than the width of the rear shaping groove; the first ejection piece is used for ejecting the push plate from the rear mold core; one end of the second ejection part extends into the flow passage.

Above-mentioned injection mold, when the product shaping, preceding mould subassembly and back mould subassembly compound die, and preceding mould benevolence leans on together with back mould benevolence, push pedal for preceding shaping groove forms the product shaping chamber with back shaping groove, and the product shaping chamber communicates with the runner in the push pedal. The liquid raw material is injected into the runner of the push plate through the injection pipe on the front mold assembly and is guided to the product forming cavity. After the product is formed, the front die assembly and the rear die assembly are opened, firstly, the first ejection piece ejects the ejector block from the rear die core, and at the moment, the product is separated from the rear die core along with the water gap on the push plate. And then, the second ejection piece ejects the water gap from the flow channel of the push plate, at the moment, because one end of the flow channel, which is connected with the rear forming groove, is provided with the diving channel from inside to outside and the opening width is smaller than that of the rear forming groove, the product cannot act together with the water gap along with the ejection of the water gap, and finally, under the obstruction of the push block, the connection part of the product and the water gap is torn off, and the product is separated from the water gap. Through the design, the movable push plate is arranged to divide the flow channel and the product forming cavity, a secondary ejection mode is adopted, the product, the water gap and the rear mold core are ejected out for the first time, then the diving channel design of the flow channel is utilized, the product is ejected out for the second time to separate the product from the water gap, so that the product ejection and water gap removing treatment are continuously completed, and the purpose of improving the working efficiency is achieved.

In one embodiment, the front molding groove is a semicircular groove; the rear molding groove is a semicircular groove matched with the front molding groove; the opening width of one end of the flow channel connected with the rear forming groove is smaller than the diameter of the rear forming groove. The front molding groove and the rear molding groove which are arranged on the semicircular groove can be used for molding round beads, and a rapid production way can be provided for the round beads.

In one embodiment, the number of the front forming grooves is multiple, and the number of the rear forming grooves is multiple and is arranged opposite to the front forming grooves one by one; the rear shaping grooves are distributed on the periphery of the push plate. The design of a plurality of front forming grooves and rear forming grooves is favorable for batch production and can improve the working efficiency.

In one embodiment, the first ejector comprises: a first guide post arranged on the rear die core in a penetrating way and a first spring sleeved on the first guide post; the first spring is positioned between the rear die core and the push plate. When front mould subassembly and back mould subassembly compound die, under the extrusion of front mould benevolence, the push pedal is impressed to the predetermined degree of depth position of back mould benevolence, and first spring is compressed this moment. When the front mold assembly and the rear mold assembly are opened, the push block is ejected out under the action of the first spring.

In one embodiment, the second ejector comprises: the driving plate is arranged on the base in a sliding mode, and the ejector rod is installed on the driving plate; one end of the ejector rod, which is far away from the driving plate, penetrates through the rear die base and the rear die core in sequence and then penetrates into the push plate. When the push block is ejected, the drive plate drives the ejector rod to eject the water gap formed in the flow channel.

In one embodiment, the second ejector further comprises: the second guide post penetrates through the driving plate and the second spring is sleeved on the second guide post; the second spring is located between the drive plate and the rear die holder. The second spring is used for automatic reset after the water gap is ejected out.

In one embodiment, a third guide pillar and a third guide sleeve which are sleeved with each other are arranged between the front die holder and the rear die holder. The third guide pillar and the third guide sleeve are used for guiding the motion tracks of the front die holder and the rear die holder, so that the precision and the stability of die assembly and die sinking are improved.

In one embodiment, the end of the flow passage connected with the rear molding groove forms an included angle of 30-60 degrees with the surface of the push plate facing the front mold core. The 30-60-degree inwards inclined diving channel structure is arranged to facilitate the water gap to be separated from the flow channel.

In one embodiment, the opening of one end of the forming groove is in a conical structure after the flow passage is connected. The opening design of the conical structure weakens the structure of the joint of the product and the water gap, so that the product and the water gap can be separated more quickly and cleanly.

In one embodiment, the taper angle of the opening at the end of the channel where the channel connects to the rear profiled groove is 10 ° to 30 °. The provision of the opening with a cone angle configuration of 10 to 30 facilitates separation of product from the nozzle.

Drawings

Fig. 1 is a schematic view of an injection mold according to an embodiment of the present invention;

FIG. 2 is a right side view of the injection mold shown in FIG. 1;

FIG. 3 is a sectional view taken along line A-A of the injection mold shown in FIG. 2;

FIG. 4 is a schematic view of a rear mold assembly in the injection mold of FIG. 1;

FIG. 5 is a partial view of the rear mold assembly shown in FIG. 4;

FIG. 6 is a schematic diagram of an open mold of the injection mold shown in FIG. 1;

FIG. 7 is a schematic diagram of a product demolding stage of the injection mold shown in FIG. 1;

fig. 8 is a schematic view of the product and gate separation stage of the injection mold shown in fig. 1.

The meaning of the reference symbols in the drawings is:

100-injection molding;

10-front mold assembly, 11-front mold base, 111-material injection pipe and 12-front mold core;

20-rear die assembly, 21-base, 22-rear die holder, 23-rear die core, 231-rear forming groove, 24-push plate, 241-runner, 25-first ejector, 251-first guide pillar, 26-second ejector, 261-drive plate, 262-ejector rod, 263-second guide pillar, 264-second spring and 27-third guide pillar.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1 to 8, an injection mold 100 according to an embodiment of the present invention is provided.

As shown in fig. 1, the injection mold 100 includes: a front mold assembly 10 and a rear mold assembly 20 disposed parallel to the front mold assembly 10. In this embodiment, the front mold assembly 10 and the rear mold assembly 20 are both vertically disposed, which has an advantage that they fall down by gravity after the product is completely demolded and the water drain is removed, and thus, a container for collecting the product can be disposed under the injection mold 100. It will be appreciated that the front mold assembly 10 and the rear mold assembly 20 may also be horizontally disposed, with the disadvantage that recycling of the product is relatively difficult. In other embodiments, the front mold assembly 10 and the rear mold assembly 20 may be inclined at an angle to the horizontal, such as 30 ° to 80 °, and the container may be engaged to recover the product.

The injection mold 100 will be further described with reference to fig. 2 to 8.

As shown in fig. 2 and 3, the front mold assembly 10 includes: a front die holder 11 and a front die core 12 arranged on the front die holder 11. The front mold base 11 is provided with a material injection pipe 111 penetrating through the front mold core 12. The front mold core 12 has a front molding groove (not shown) on its surface.

As shown in fig. 2 to 5, the rear mold assembly 20 includes: the mold comprises a base 21, a rear mold base 22 connected to the base 21, a rear mold core 23 installed on the rear mold base 22, a push plate 24 slidably arranged on the rear mold core 23, a first ejector 25 connected between the rear mold core 23 and the push plate 24, and a second ejector 26 penetrating into the push plate 24.

As shown in fig. 3, the surface of the rear core 23 is provided with a rear molding groove 231 opposite to the front molding groove. The rear molding groove 231 and the front molding groove together constitute a product molding cavity. In this scheme, can have the multiple to the structure setting in back shaping groove 231 and preceding shaping groove, the requirement that its needs satisfy is: when the front mold assembly 10 is opened at the rear mold assembly 20, the product stays in the rear molding groove 231, and the product is not jammed by the rear molding groove 231.

For example, in the present embodiment, taking injection molding of a round bead as an example, the front molding groove is a semicircular groove. The rear molding groove 231 is a semicircular groove matched with the front molding groove. The opening width of the flow passage 241 at the end connected to the rear molding groove 231 is smaller than the diameter of the rear molding groove 231. The front molding groove and the rear molding groove 231 provided with the semicircular grooves can be used for molding round beads, and a rapid production way can be provided for the round beads.

The injection mold 100 of the present embodiment is not limited to molding round beads, and may be other shaped products, such as square, diamond, and other shaped products, by providing corresponding front molding grooves and rear molding grooves 231.

In addition, as shown in fig. 4, in the present embodiment, the number of the front molding grooves is plural, and the number of the rear molding grooves 231 is also plural and is disposed opposite to the front molding grooves one by one. The rear shaping grooves 231 are distributed on the peripheral side of the push plate 24. The design of a plurality of front forming grooves and rear forming grooves 231 is favorable for mass production, and the working efficiency can be improved.

As shown in fig. 3 and 4, the push plate 24 is provided with a flow passage 241 abutting against the injection pipe 111. One end of the flow passage 241 extends from the inside to the outside to communicate with the rear molding groove 231. And the opening width of the flow passage 241 at the end connected to the rear forming groove 231 is smaller than the width of the rear forming groove 231. The first ejector 25 is used to eject the ejector plate 24 from the rear core 23. One end of the second ejector 26 extends into the flow passage 241.

In this embodiment, an included angle between one end of the flow channel 241 connected to the rear molding groove 231 and a surface of the push plate 24 facing the front mold core 12 is 30 ° to 60 °. The 30-60 degree inclined inward diving channel structure is arranged to facilitate the water gap to be separated from the flow channel 241. For example, in the present embodiment, an included angle between one end of the flow channel 241 connected to the rear forming groove 231 and a surface of the push plate 24 facing the front mold core 12 is 45 °, and in other embodiments, the included angle may be 30 °, 40 °, 50 °, 55 °, 60 °, or the like.

In this embodiment, the opening of the flow channel 241 connected to one end of the rear molding groove 231 has a tapered shape. The opening design of the conical structure weakens the structure of the joint of the product and the water gap, so that the product and the water gap can be separated more quickly and cleanly.

Further, the taper angle of the opening of the flow passage 241 connected to one end of the rear molding groove 231 is 10 ° to 30 °. The provision of the opening with a cone angle configuration of 10 to 30 facilitates separation of product from the nozzle. For example, in the present embodiment, the taper angle of the opening of the flow channel 241 connected to the one end of the rear molding groove 231 is 20 °, and in other embodiments, it may be 10 °, 15 °, 20 °, 25 °, 30 °, or the like.

In this embodiment, the first ejector 25 may be provided in various manners, and may be of an active or passive design.

Taking the passive type as an example, as shown in fig. 5, in the present embodiment, the first ejector 25 includes: a first guide post 251 passing through the rear mold core 23 and a first spring (not shown) sleeved on the first guide post 251. The first spring is located between the rear mold core 23 and the push plate 24. When the front mold assembly 10 and the rear mold assembly 20 are closed, the push plate 24 is pressed into the predetermined depth position of the rear mold core 23 by the extrusion of the front mold core 12, and the first spring is compressed. When the front mold assembly 10 and the rear mold assembly 20 are opened, the ejector block is ejected under the action of the first spring.

In this embodiment, the second ejection member 26 is arranged in a similar manner to the first ejection member 25, and may be of an active or passive design.

Taking the active mode as an example, as shown in fig. 3 and 4, in the present embodiment, the second ejection member 26 includes: a driving plate 261 slidably provided on the base 21, and a push rod 262 mounted on the driving plate 261. One end of the mandril 262 far away from the driving plate 261 penetrates through the rear die holder 22 and the rear die core 23 in sequence and then penetrates into the push plate 24. After the push block is ejected, the driving plate 261 drives the ejector rod 262 to eject the nozzle formed in the flow channel 241.

Further, in the present embodiment, the second ejector 26 further includes: a second guide post 263 inserted through the driving plate 261, and a second spring 264 sleeved on the second guide post 263. The second spring 264 is located between the driving plate 261 and the rear mold 22. The second spring 264 is used for automatic reset after the nozzle is ejected.

In addition, as shown in fig. 4, in the present embodiment, a third guide pillar 13 and a third guide sleeve (not shown) are disposed between the front mold base 11 and the rear mold base 22. The third guide pillar 13 and the third guide sleeve are used for guiding the motion tracks of the front die holder 11 and the rear die holder 22, so that the accuracy and the stability of die assembly and die opening are improved.

When a product is molded, the front mold assembly 10 and the rear mold assembly 20 are assembled, the front mold core 12 abuts against the rear mold core 23 and the push plate 24, so that the front molding groove and the rear molding groove 231 form a product molding cavity, and the product molding cavity is communicated with the flow channel 241 on the push plate 24. The liquid raw material is injected into the runner 241 of the push plate 24 through the injection tube 111 of the front mold assembly 10 and is guided to the product-forming cavity. After the product is formed, the front mold assembly 10 and the rear mold assembly 20 are opened, as shown in fig. 6, first, as shown in fig. 7, the first ejector 25 ejects the ejector block from the rear mold core 23, and at this time, the product is separated from the rear mold core 23 along with the nozzle of the ejector plate 24. Next, as shown in fig. 8, the second ejector 26 ejects the nozzle from the flow channel 241 of the push plate 24, at this time, since one end of the flow channel 241 connected to the rear shaping groove 231 is provided with a diving channel from inside to outside and the opening width is smaller than the width of the rear shaping groove 231, the product cannot follow the nozzle along with the ejection of the nozzle, and finally, the connection between the product and the nozzle is torn off under the obstruction of the push block, and the product is separated from the nozzle.

According to the injection mold 100, the movable push plate 24 is arranged to divide the runner 241 and the product forming cavity, a secondary ejection mode is adopted, the product and the water gap are demolded with the rear mold core 23 through the primary ejection, then the product and the water gap are separated through the secondary ejection by utilizing the diving channel design of the runner 241, so that the demolding and the water gap removing of the product are continuously completed, and the purpose of improving the working efficiency is achieved.

The above examples only represent preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. An injection mold, comprising:

a front mold assembly; the front mold assembly comprises: the front die comprises a front die holder and a front die core arranged on the front die holder; the front die base is provided with a material injection pipe penetrating through the front die core; the surface of the front mold core is provided with a front molding groove; and

a rear mold assembly disposed parallel to the front mold assembly; the rear mold assembly includes: the ejection mechanism comprises a base, a rear die holder connected to the base, a rear die core installed on the rear die holder, a push plate arranged on the rear die core in a sliding manner, a first ejection piece connected between the rear die core and the push plate, and a second ejection piece penetrating into the push plate; the surface of the rear die core is provided with a rear molding groove which is opposite to the front molding groove; the rear forming groove and the front forming groove jointly form a product forming cavity; the push plate is provided with a flow passage butted with the material injection pipe; one end of the flow channel extends from inside to outside to be communicated with the rear forming groove; the opening width of one end of the flow channel, which is connected with the rear forming groove, is smaller than the width of the rear forming groove; the first ejection piece is used for ejecting the push plate from the rear mold core; one end of the second ejection member extends into the flow passage.

2. An injection mold as claimed in claim 1, wherein said front molding groove is a semi-circular groove; the rear molding groove is a semicircular groove matched with the front molding groove; the opening width of one end of the flow channel, which is connected with the rear forming groove, is smaller than the diameter of the rear forming groove.

3. The injection mold of claim 1, wherein the number of the front molding grooves is multiple, and the number of the rear molding grooves is multiple and is arranged opposite to the front molding grooves one by one; the rear shaping grooves are distributed on the peripheral side of the push plate.

4. An injection mold as claimed in claim 1, wherein the first ejector comprises: the first guide post penetrates through the rear die core and the first spring is sleeved on the first guide post; the first spring is positioned between the rear die core and the push plate.

5. An injection mold as claimed in claim 1, wherein the second ejector comprises: the driving plate is arranged on the base in a sliding mode, and the ejector rod is mounted on the driving plate; one end of the ejector rod, which is far away from the driving plate, penetrates through the rear die base and the rear die core in sequence and then penetrates into the push plate.

6. An injection mold as claimed in claim 5, wherein the second ejector further comprises: the second guide post penetrates through the driving plate and the second spring is sleeved on the second guide post; the second spring is located between the driving plate and the rear die holder.

7. The injection mold of claim 1, wherein a third guide post and a third guide sleeve are sleeved with each other between the front mold base and the rear mold base.

8. An injection mold according to claim 1, wherein an included angle of 30 ° to 60 ° is formed between one end of the flow channel connected to the rear molding groove and a face of the push plate facing the front core.

9. An injection mold as claimed in claim 1, wherein the opening at the end of the flow channel connecting the back forming groove is shaped as a cone.

10. An injection mold as claimed in claim 9, wherein the taper angle of the opening of said flow channel at the end connecting said back forming groove is 10 ° to 30 °.

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