阅读说明：本技术 一种带活动弹针的双色模具 (Double-color mold with movable elastic needle ) 是由 倪晗 钟汉杰 陈凯 于 2021-08-02 设计创作，主要内容包括：本发明公开了一种带活动弹针的双色模具,包括模具前模、模具后模,模具前模包括一射滑块前模和二射滑块前模,模具后模包括滑块后模,滑块后模包括滑块座、滑块镶件、活动弹针、弹针板,所述滑块镶件设置于滑块座的一侧,所述滑块镶件上设有通孔,所述弹针板设置于滑块座的另一侧,弹针板与滑块座之间设有滑块弹簧,所述活动弹针一端安装于弹针板的一侧,所述活动弹针的另一端伸入通孔内,所述弹针板的另一侧设有伸出段,所述一射滑块前模包括第一滑块楔紧块,所述第一滑块楔紧块的侧壁上设有压紧面,所述二射滑块前模包括第二滑块楔紧块,所述第二滑块楔紧块的侧壁上设有避让孔,本发明结构设计合理,而且最终产品的结合力强,不易脱离。(The invention discloses a double-color die with a movable spring needle, which comprises a die front die and a die rear die, wherein the die front die comprises a slide block front die and a slide block front die, the die rear die comprises a slide block rear die, the slide block rear die comprises a slide block seat, a slide block insert, a movable spring needle and a spring needle plate, the slide block insert is arranged on one side of the slide block seat, a through hole is arranged on the slide block insert, the spring needle plate is arranged on the other side of the slide block seat, a slide block spring is arranged between the spring needle plate and the slide block seat, one end of the movable spring needle is arranged on one side of the spring needle plate, the other end of the movable spring needle extends into the through hole, an extending section is arranged on the other side of the spring needle plate, the slide block front die comprises a first slide block wedge block, a pressing surface is arranged on the side wall of the first slide block wedge block, the slide block front die comprises a second slide block wedge block, a avoiding hole is arranged on the side wall of the second slide block wedge block, the invention has reasonable structural design, and the final product has strong binding force and is not easy to separate.)

1. The utility model provides a double-colored mould of area activity bullet needle, includes mould front mould, mould back mould, the mould front mould includes that one penetrates the slider front mould and two penetrate the slider front mould, mould includes mould, its characterized in that behind the slider behind the mould: the rear sliding block die comprises a sliding block seat, a sliding block insert, a movable elastic needle and an elastic needle plate, the sliding block insert is arranged on one side of the sliding block seat and used for forming the side edge of a product model, a through hole is formed in the sliding block insert, the elastic needle plate is arranged on the other side of the sliding block seat, a sliding block spring is arranged between the elastic needle plate and the sliding block seat, one end of the movable elastic needle is arranged on one side of the elastic needle plate, the other end of the movable elastic needle penetrates through the sliding block seat and extends into the through hole of the sliding block insert, an extending section is arranged on the other side of the elastic needle plate, the front first sliding block die comprises a first sliding block wedging block, a pressing surface is arranged on the side wall of the first sliding block wedging block, the front second sliding block die comprises a second sliding block wedging block, and an avoiding hole is formed in the side wall of the second sliding block wedging block,

when in injection molding, the mold is closed for one time to perform one shooting, the slide block rear mold is matched with a slide block front mold, the first slide block wedging block is matched with the slide block seat to enable a pressing surface to be abutted against an extending section, an elastic block spring is compressed by an elastic needle plate to push the movable elastic needle to move axially and extend out of the through hole, a forming mounting hole is formed in the outer layer of a product, the mold is opened for one time, the slide block front mold is separated from the slide block rear mold, the slide block spring is reset to drive the movable elastic needle to retract into the through hole, the mold rear mold is driven to rotate by a driving element, the mold is closed for the second time to perform two shooting, the slide block rear mold is matched with the two-shot slide block front mold, a avoiding hole in the second slide block wedging block corresponds to the extending section, the extending section extends into the avoiding hole, and the second slide block wedging block cannot push the movable elastic needle to extend out of the through hole, so that the inner layer of the product can be molded to form a positioning block extending into the mounting hole.

2. The double-color mold with the movable elastic needle as claimed in claim 1, wherein: the side surface of the second slide block wedging block is provided with a groove, the front mold of the second injection slide block also comprises a slide block elastic block, an elastic block pressing plate and an elastic block spring, the elastic block pressing plate is fixedly arranged in the groove, the slide block elastic block is movably arranged in the groove, the slide block elastic block is provided with a contact part, the elastic block pressing plate is provided with a through groove matched with the contact part, the elastic block spring is arranged in the groove and is abutted against the slide block elastic block, so that the contact part extends out of the through groove, the slide block seat is provided with a mold opening groove which is arranged in an inclined way,

in-process of mould secondary compound die, the contact site earlier with the cooperation of die cavity lateral wall, slider bullet piece compression bullet piece spring drives the contact site and contracts back, when slider bullet piece removed to die cavity inside, bullet piece spring resets, drives the contact site through slider bullet piece and passes logical inslot and stretch into the die cavity, when the mould secondary die sinking, the mould front mould drives second slider wedge piece antedisplacement, and the in-process of second slider wedge piece antedisplacement drives through the cooperation of contact site with the die cavity slider seat sideslip to loose core.

3. The double-color mold with the movable elastic needle as claimed in claim 1, wherein: the side wall of the front side of the contact part is provided with an elastic block inclined guide surface, the outer side wall of the die opening groove is provided with a sliding block seat inclined surface, and the elastic block inclined guide surface is in contact with the sliding block seat inclined surface in the secondary die closing process of the die.

4. The double-color mold with the movable elastic needle as claimed in claim 1, wherein: the inside wall of the die cavity is a plane, the side wall of the rear side of the contact part is a plane, and when the die is opened for the second time, the side wall of the rear side of the contact part is in contact with the inside wall of the die cavity.

5. The double-color mold with the movable elastic needle as claimed in claim 1, wherein: the slider seat is characterized in that a mounting cavity is formed in the side wall of the slider seat, the elastic needle plate is arranged in the mounting cavity, a cover plate used for sealing the mounting cavity is further mounted on the slider seat, and a stretching hole for stretching out the movable elastic needle is formed in the cover plate.

6. The double-color mold with the movable elastic needle as claimed in claim 1, wherein: the lateral wall of first slider wedging piece is equipped with the mounting groove, install the slider adjusting block in the mounting groove, the face that compresses tightly set up in on the slider adjusting block.

7. The double-color mold with the movable elastic needle as claimed in claim 1, wherein: the end part of the movable spring needle is protruded to form a step part, and when the mold is secondarily closed to perform secondary injection, the step part extends out of the through hole.

Technical Field

The invention relates to the technical field of dies, in particular to a double-color die with movable elastic needles.

Background

Two-color injection molding is the most complex and representative of multi-component injection molding processes. The basic principle is as follows: after the injection of each component material, the partially formed product remains in the mold cavity and moves with the mold in some way (i.e., semi-finished product transfer technique) to the next station, followed by subsequent injection molding of the component material and finally cooling and solidifying to obtain the whole product. The forming process has the advantages that: the partially formed article does not require a subsequent injection of the next component material out of the original mold and into another mold. Thus, the molding process can effectively reduce the injection molding cycle and can produce a multi-colored article having more components.

At present, many automobile injection parts adopt a double-color injection molding process, generally adopt a secondary injection molding form, and a first-color product is molded after primary injection molding, and then a second-color product is molded to form a double-color product. For example, the casing of the mobile phone box in the automobile is made by adopting a double-shot injection molding process, the soft rubber outside the casing of the mobile phone box is subjected to first injection molding, and the hard rubber inside the casing of the mobile phone box is subjected to second injection molding, but in the injection molding mode, the side bonding force of the soft rubber and the hard rubber of the casing of the mobile phone box which is finally molded is not strong, and the casing of the mobile phone box is easy to fall off and has defects.

Disclosure of Invention

Aiming at the defects of the prior art, the double-color die with the movable elastic needle is provided, the structural design is reasonable, the binding force of the final product is strong, and the final product is not easy to separate.

In order to achieve the above object, the present invention provides the following technical solutions.

A double-color mold with a movable bullet needle comprises a mold front mold, a mold rear mold and a driving element for driving the mold rear mold to rotate, wherein the mold front mold comprises a slider injection front mold and a slider injection front mold, the mold rear mold comprises a slider rear mold, a space for the slider rear mold to move in is formed between the slider injection front mold and the slider injection front mold, the slider rear mold comprises a slider seat, a slider insert, the movable bullet needle and a bullet needle plate, the slider seat is mounted on the mold rear mold, the slider insert is arranged on one side of the slider seat and used for forming the side edge of a product, the slider insert is provided with a through hole, the bullet needle plate is arranged on the other side of the slider seat, a slider spring is arranged between the bullet needle plate and the slider seat, one end of the movable bullet needle is mounted on one side of the bullet needle plate, and the other end of the movable bullet needle passes through the slider seat and extends into the through hole of the slider insert, the other side of the ejector pin plate is provided with an extending section, the first ejector slide block front die comprises a first slide block wedging block, the side wall of the first slide block wedging block is provided with a pressing surface, the pressing surface is arranged in an inclined manner, the second ejector slide block front die comprises a second slide block wedging block, the side wall of the second slide block wedging block is provided with an avoiding hole, during injection molding, a die is closed for one-time ejection, the slide block rear die is matched with the first ejector slide block front die, the first slide block wedging block is matched with the slide block seat, the pressing surface is abutted against the extending section, the movable ejection pin is pushed to move axially by an ejection pin plate compression ejection block spring and extends out of the through hole, a mounting hole is formed in a product, the die is opened once, the first ejector slide block front die is separated from the slide block rear die, the slide block spring resets to drive the movable ejection pin to retract into the through hole, and the drive element to drive the die rear die to rotate, and (3) carrying out secondary injection by secondary die assembly of the die, matching the slider rear die with a secondary injection slider front die at the moment, and enabling the avoidance hole in the second slider wedging block to correspond to the extension section, so that the second slider wedging block cannot push the movable elastic needle to move, and the movable elastic needle is kept in the through hole, so that a positioning block which extends into the mounting hole can be formed on a product.

The invention has the beneficial effects that: in the die structure of the invention, during injection molding, the die is closed, the rear die of the slide block is matched with the front die of the ejection slide block, namely the first slide block wedge block is matched with the slide block seat, the pressing surface is abutted against the extension section so as to push the elastic needle plate to move, the movable elastic needle is driven to axially move when the elastic needle plate moves so as to extend out of the through hole and enter the injection molding cavity, therefore, during one-time injection molding of hard rubber, due to the existence of the movable elastic needle in the injection molding cavity, a mounting hole can be formed on a product, when the die is opened for one time, the front die of the ejection slide block is separated from the rear die of the slide block, the pressing surface is not abutted against the extension section any more, so that a spring is reset to push the elastic needle plate to reset, the movable elastic needle retracts into the through hole, the rear die is driven by a driving element to rotate 180 degrees, the die is secondarily closed to carry out two-shot molding, at the moment, the rear die of the slide block is matched with the front die of the two-shot slide block, the flexible rubber, the avoidance hole on the second slide block wedge block is corresponding to the extension section, stretch into the section promptly and stretch into dodge downtheholely to the second slider wedging piece can not promote the activity and play the needle and remove, and the activity is played the needle and is kept in the through-hole, consequently when two injection molding flexible glue, because the existence of mounting hole, the product can be at the mounting hole shaping locating piece, thereby makes between the inlayer soft glue part and the outer ebonite part of product side, cooperates through mounting hole and locating piece, thereby increases the cohesion of product, is difficult for breaking away from between inlayer soft glue part and the outer ebonite part.

As an improvement of the invention, the side surface of the second slide block wedging block is provided with a groove, the two-shot slide block front mold also comprises a slide block elastic block, an elastic block pressing plate and an elastic block spring, the elastic block pressing plate is fixedly arranged in the groove, the slide block elastic block is movably arranged in the groove, the slide block elastic block is provided with a contact part, the elastic block pressing plate is provided with a through groove matched with the contact part, the elastic block spring is arranged in the groove and is abutted against the slide block elastic block, so that the contact part extends out of the through groove, the slide block seat is provided with a mold opening groove which is arranged in an inclined manner, in the secondary mold closing process of the mold, the contact part is firstly matched with the outer side wall of the mold opening groove, the slide block elastic block compresses the elastic block spring to drive the contact part to retract, when the slide block elastic block moves to the interior of the mold opening groove, the elastic block spring resets, and drives the contact part to pass through the through groove and extend into the mold opening groove through the slide block elastic block, when the mold is opened for the second time, the front mold of the mold drives the second slide block wedging block to move forwards, and in the process of moving forwards of the second slide block wedging block, the contact part is matched with the mold opening groove to drive the slide block seat to move transversely, so that core pulling is carried out. Through the improvement, when the mold is closed for the second time, the sliding block elastic block cannot interfere with the sliding block seat, and when the mold is opened for the second time, the sliding block elastic block can drive the sliding block seat to transversely move to pull the core.

As an improvement of the invention, the side wall of the front side of the contact part is provided with an elastic block inclined guide surface, the outer side wall of the die opening groove is provided with a slider seat inclined surface, and the elastic block inclined guide surface is contacted with the slider seat inclined surface in the secondary die closing process of the die. Through the improvement, the contact part is pushed to move when the mold is closed for the second time.

As an improvement of the present invention, the inner side wall of the die cavity is a plane, the side wall of the rear side of the contact portion is a plane, and when the die is opened for the second time, the rear side wall of the contact portion is in contact with the inner side wall of the die cavity. Through the improvement, when the mold is opened for the second time, the contact part can drive the sliding block seat to move transversely to loose the core.

As an improvement of the invention, an installation cavity is formed on the side wall of the slider seat, the bullet needle plate is arranged in the installation cavity, a cover plate used for closing the installation cavity is further arranged on the slider seat, and a protruding hole for the movable bullet needle to extend out is formed in the cover plate. Through the improvement, the excessive movement of the elastic needle plate can be avoided.

As an improvement of the present invention, an installation groove is formed in a side wall of the first slider wedging block, a slider adjustment block is installed in the installation groove, and the pressing surface is disposed on the slider adjustment block.

The end of the movable spring needle is convexly provided with a step part, and the step part extends out of the through hole when the mold is secondarily closed for secondary injection. Through the improvement, the formed mounting hole is a stepped hole, the positioning block is stepped, and the inner layer soft rubber part and the outer layer hard rubber part are combined more strongly.

Drawings

FIG. 1 is a schematic diagram of a mold back of the present invention.

Fig. 2 is a schematic view of the structure of the front mold of the present invention.

FIG. 3 is a schematic diagram of the combination of a one-shot slider front mold, a two-shot slider front mold structure and a slider back mold of the present invention.

Fig. 4 is an exploded view of the back mold of the slider of the present invention.

FIG. 5 is a schematic view of the slider housing structure of the present invention.

Fig. 6 is a schematic view of the movable bullet needle structure of the present invention.

FIG. 7 is an exploded view of a front mold of a slide according to the present invention.

FIG. 8 is an exploded view of the front mold of the two-shot slider of the present invention.

Fig. 9 is a schematic view of the slider bullet structure of the present invention.

FIG. 10 is a schematic view of a one shot slider front mold and slider back mold configuration of the present invention.

Fig. 11 is a schematic cross-sectional view of fig. 10 of the present invention.

FIG. 12 is a schematic diagram of the two shot slider front mold and slider back mold configuration of the present invention.

Fig. 13 is a schematic cross-sectional view of fig. 12 of the present invention.

Figure 14 is a schematic representation of the structure of the outer layer of the product of the present invention.

Fig. 15 is a schematic view of the inner layer structure of the product of the present invention.

Fig. 16 is a schematic view of the overall structure of the product of the present invention.

In the figure, 1, a slide block rear die; 1.1, a sliding block seat; 1.11, mounting a cavity; 1.12, opening a die cavity; 1.13, oblique guide surfaces of the sliding block seat; 1.2, a slide block insert; 1.21, a through hole; 1.3, moving the elastic needle; 1.31, step part; 1.4, a spring needle plate; 1.5, a slider spring; 1.6, a protruding section; 1.7, a cover plate; 2. a front mold for injecting the slide block; 2.1, a first slide block wedging block; 2.2, adjusting blocks of the sliding block; 2.21, pressing surface; 3. a second injection slide block front mould; 3.1, a second slide block wedging block; 3.11, avoiding holes; 3.2, grooves; 3.3, a slide block and a spring block; 3.31, a contact part; 3.32, an inclined guide surface of the elastic block; 3.4, pressing a spring block; 3.41, a through groove; 3.5, a spring block spring; 4. an outer layer of the product; 4.1, mounting holes; 5. an inner layer of the product; 5.1, positioning blocks; 5.2, notches.

Detailed Description

The invention is further explained with reference to the drawings.

Referring to fig. 1 to 16, a two-color mold with a movable spring pin 1.3 includes a front mold, a rear mold and a driving element for driving the rear mold to rotate, the front mold includes a front mold 2 for a first injection slide block and a front mold 3 for a second injection slide block, the rear mold includes a rear mold 1 for a slide block, a space for the rear mold 1 to move into is provided between the front mold 2 for the first injection slide block and the front mold 3 for the second injection slide block, and when the mold is closed, the rear mold 1 for the slide block is located between the front mold 2 for the first injection slide block and the front mold 3 for the second injection slide block.

Referring to fig. 4 to 6, the rear slider mold 1 includes a slider seat 1.1, a slider insert 1.2, a movable pogo pin 1.3, and a pogo pin plate 1.4, the slider seat 1.1 is slidably mounted on the rear mold of the mold, the slider insert 1.2 is disposed on one side of the slider seat 1.1 for forming a side edge of a product molded during injection molding, a through hole 1.21 is disposed on the slider insert 1.2, the pogo pin plate 1.4 is disposed on the other side of the slider seat 1.1, the side of the slider seat 1.1 is formed with a mounting cavity 1.11 and a cover plate 1.7 for closing an opening of the mounting cavity 1.11, a slider spring 1.5 is disposed between the pogo pin plate 1.4 and the slider seat 1.1, the pogo pin plate 1.4 and the slider spring 1.5 are disposed in the mounting cavity 1.11, the slider spring 1.5 is located in the mounting cavity 1.11, one end of the slider spring 1.5 abuts against an inner wall of the mounting cavity 1.11, the other end of the slider spring 1.5 abuts against one side of the pogo pin plate 1.4, and one end of the movable pogo pin plate 1.4 is mounted on pin plate 3, the other end of the movable elastic needle 1.3 penetrates through the slider seat 1.1 and extends into the through hole 1.21 of the slider insert 1.2, a step part 1.31 is formed at the end part of the movable elastic needle 1.3 in a protruding mode, the step part 1.31 is columnar, and the diameter of the step part 1.31 is smaller than that of the movable elastic needle 1.3. The opposite side of bullet faller 1.4 is equipped with and stretches out section 1.6, stretches out section 1.6 and is the column, specifically speaking, stretches out section 1.6 and activity bullet needle 1.3 and can be an organic whole, stretches out section 1.6 and activity bullet needle 1.3 also can be for dividing the piece, in this embodiment, stretches out section 1.6 and activity bullet needle 1.3 and is for dividing the piece. Be equipped with the hole that stretches out that supplies to stretch out section 1.6 and stretch out on apron 1.7, stretch out section 1.6 and pass and stretch out the hole, through setting up apron 1.7, can make the faller board 1.4 remove in installation cavity 1.11 moreover, avoid deviating from.

The inboard of slider seat 1.1 is equipped with die cavity 1.12, die cavity 1.12 is the slope setting, the lateral wall of die cavity 1.12 is equipped with slider seat 1.1 inclined plane, and the inside wall of die cavity 1.12 is the plane.

Referring to fig. 7, the one-shot slider front mold 2 includes a first slider wedging block 2.1, a pressing surface 2.21 is provided on a side wall of the first slider wedging block 2.1, the pressing surface 2.21 is disposed in an inclined manner, specifically, a mounting groove is provided on a side wall of the first slider wedging block 2.1, a slider adjusting block 2.2 is mounted in the mounting groove, a side surface of the slider adjusting block 2.2 is the pressing surface 2.21, and the slider adjusting block 2.2 and the first slider wedging block 2.1 are disposed in a separated manner, so that an inclination angle of the pressing surface 2.21 can be adjusted conveniently.

Referring to fig. 8 to 10, the two-shot sliding block front mold 3 includes a second sliding block wedge block 3.1, a side wall of the second sliding block wedge block 3.1 is obliquely arranged and is provided with an avoiding hole 3.11, and the size of the avoiding hole 3.11 is matched with the size of the extending section 1.6.

The left side surface and the right side surface of the second slider wedge-caulking block 3.1 are respectively provided with a groove 3.2, the second ejection slider front die 3 further comprises a slider elastic block 3.3, an elastic block pressing plate 3.4 and an elastic block spring 3.5, the elastic block pressing plate 3.4 is fixedly installed in the groove 3.2, the slider elastic block 3.3 is movably arranged in the groove 3.2, one end of the elastic block spring 3.5 is abutted against the inner wall of the groove 3.2, the other end of the elastic block spring 3.5 is abutted against the side wall of the slider elastic block 3.3, the other side of the slider elastic block 3.3 is convexly provided with a contact part 3.31, the elastic block pressing plate 3.4 is provided with a through groove 3.41 matched with the contact part 3.31, the elastic block spring 3.5 pushes the contact part 3.31 to extend out of the through groove 3.41, in the embodiment, the contact part 3.31 and the slider elastic block 3.3.3 are in an integrally formed structure, the side wall of the front side of the contact part 3.31 is provided with an inclined guide surface 3.32, and the side wall of the rear side wall is a plane.

Referring to fig. 10 to 11, during injection molding, the upper mold and the lower mold are first closed to perform a hard glue injection, at this time, the rear slider mold 1 is matched with the front slider injection mold 2, during the closing process of the rear slider mold 1 and the front slider injection mold 2, the first slide block wedging block 2.1 is driven to gradually move relative to the slide block seat 1.1, so that the pressing surface 2.21 is abutted against the extending section 1.6, thereby pushing the extending section 1.6 to move, driving the elastic needle plate 1.4 to compress the elastic block spring 3.5 and pushing the movable elastic needle 1.3 to move axially and extend out of the through hole 1.21, at the moment, the end part of the movable elastic needle 1.3 extends into the injection molding cavity, so that when the hard rubber part of the outer layer 4 of the product is molded in the injection molding cavity, due to the existence of the end part of the movable elastic needle 1.3, a mounting hole 4.1 is formed on the hard glue of the outer layer 4 of the product, and the end part of the movable elastic needle 1.3 is provided with a step part 1.31, so that the mounting hole 4.1 is a stepped hole.

After the injection is finished, the mold is opened at one time, the injection slide block front mold 2 is separated from the slide block rear mold 1, the slide block spring 1.5 is reset to drive the movable elastic needle 1.3 to retract into the through hole 1.21, the step part 1.31 is positioned outside the through hole 1.21, and then the mold rear mold is driven to rotate 180 degrees through the driving element.

Referring to fig. 12 to 13, the upper die and the lower die of the die are closed for the second injection of soft plastic, at this time, the rear die 1 of the slide block is matched with the front die 3 of the second injection slide block, the rear die 1 of the slide block and the front die 3 of the second injection slide block drive the second slide block wedging block 3.1 to gradually move relative to the slide block seat 1.1 in the process of closing the die, because of the existence of the contact part 3.31, the contact part 3.31 will contact the outer side wall of the open die cavity 1.12 first when moving, because of the contact part 3.31 having the inclined guide surface 3.32 of the spring block, the outer side wall of the open die cavity 1.12 having the inclined surface 1.1, when the inclined guide surface 3.32 of the spring block is matched with the inclined surface 1.1 of the slide block, the contact part 3.31 drives the slide block 3.3 to compress the spring 3.5 to move, so that the contact part 3.31 gradually retracts into the through groove 3.41, and the rigid contact part 3.31 is prevented from contacting the open die cavity 1.12, due to the disappearance of the resistance, the elastic block spring 3.5 can elastically reset, and the contact part 3.31 is driven by the sliding block elastic block 3.3 to move out of the through groove 3.41, so that the elastic block spring extends into the die opening groove 1.12.

Meanwhile, as the avoiding hole 3.11 on the second slider wedging block 3.1 corresponds to the extending section 1.6, the extending section 1.6 can extend into the avoiding hole 3.11, so that the elastic needle plate 1.4 can not be pushed to move, the movable elastic needle 1.3 can be kept in the through hole 1.21, the step part 1.31 is positioned outside the through hole 1.21 and in the injection molding cavity, and a soft rubber part can be formed in the through hole 1.21, at the time, when the inner layer 5 soft rubber part of the product is formed in the injection molding cavity, the positioning block 5.1 can be formed at the mounting hole 4.1 of the outer layer 4 hard rubber of the product due to the existence of the step part 1.31, the bonding force between the outer layer 4 hard rubber of the product and the inner layer soft rubber is increased through the matching of the positioning block 5.1 and the mounting hole 4.1, the separation is not easy to occur, and the mounting hole 4.1 is a stepped hole, so that the formed positioning block 5.1 is stepped hole, and the bonding is firmer. Due to the existence of the step part 1.31, the notch 5.2 is formed on the end surface of the positioning block 5.1 during molding, and the step part 1.31 is positioned in the notch 5.2.

After the second shot of flexible glue is accomplished, the mould carries out the secondary die sinking, drives second slider wedge piece 3.1 and removes, and the mould front mould drives second slider wedge piece 3.1 antedisplacement, and the in-process that second slider wedge piece 3.1 antedisplacement, contact site 3.31 and die cavity 1.12's cooperation drive slider seat 1.1 sideslip to drive activity bullet needle 1.3 and remove, loose core makes step 1.31 shift out from notch 5.2, so that the product takes out smoothly from the injection molding die cavity, can not take place to interfere. And because the inside wall of die cavity 1.12 is the plane, the lateral wall of the rear side of contact portion 3.31 is the plane, and the rear side lateral wall of contact portion 3.31 contacts with the inside wall of die cavity 1.12, can guarantee that slider seat 1.1 is the sideslip steadily.

After the secondary die opening, the driving element drives the rear die of the die to rotate 180 degrees, and the die is closed again to perform hard glue injection, and the steps are repeated.

In the die structure, during one-time die assembly, the movable elastic needle 1.3 is pushed to move out of the injection molding cavity through the pressing surface 2.21 on the first slide block wedge block 2.1, so that the mounting hole 4.1 can be formed on the hard glue on the outer layer 4 of a product, during two-time die assembly, the avoiding hole 3.11 on the second slide block wedge block 3.1 is used, during secondary die assembly, the extending section 1.6 can move into the avoiding hole 3.11, so that the movable elastic needle 1.3 retracts into the through hole 1.21, the positioning block 5.1 can be formed on the mounting hole 4.1 on the soft glue part on the inner layer 5 of the product, and simultaneously, because the soft glue part can be formed in the through hole 1.21 and the step part 1.31 extends out of the die cavity, the movable elastic needle 1.3 needs to be subjected to core pulling so that the product can be smoothly demoulded, the slide block 3.3 is arranged, so that when the die is opened for the second time, the die front die drives the second slide block wedge block 3.1 to move forwards, through the cooperation of contact site 3.31 and die cavity 1.12, drive slider seat 1.1 sideslip to loose core, and because the existence of slider bullet piece 3.3, consequently set up bullet piece spring 3.5, make the mould when the secondary compound die, contact site 3.31 drives slider bullet piece 3.3 compression bullet piece spring 3.5 and removes, make contact site 3.31 retract to leading to groove 3.41 in gradually, avoid taking place the rigid contact between contact site 3.31 and the lateral wall of die cavity 1.12, structural design is reasonable, injection moulding and drawing of patterns are convenient, and the product cohesion after the shaping is strong, be difficult for droing.

The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present invention are included in the scope of the present invention.