CN115256827A - Multi-insert integrated injection molding type injection mold and injection molding method - Google Patents

Abstract

The invention relates to the technical field of injection molds and discloses a multi-insert integrated injection mold and an injection molding method. The mould includes: the fixed die comprises a fixed die plate and a fixed die core; the movable mold comprises a movable template and a movable mold core; the core pulling mechanism comprises a first sliding block and a first sliding seat, and the first connecting part and the second connecting part are detachably connected with the first sliding block; the movable mold core is provided with a third positioning part and a fourth positioning part, and the first positioning part and the second positioning part are respectively and movably abutted against the third positioning part and the fourth positioning part so as to position the first insert and the second insert in the cavity in a coordinated manner. The die has the advantages that the die can be used for cooperatively positioning the first insert and the second insert, the problem of inconvenience in positioning of a single insert is solved, the positioning precision is high, the positioning is convenient, and the inserts are convenient to disassemble and assemble.

Description

Multi-insert integrated injection molding type injection mold and injection molding method

Technical Field

The invention relates to the technical field of injection molds, in particular to a multi-insert integrated injection mold and an injection molding method.

Background

Many plastic products, such as the sound bracket and the motor cover plate of an automobile, have conductive requirements, and the main structure of the plastic products forms a shell to protect the electronic components inside the shell, and the main body is provided with a metal wire for connecting the electronic components inside the shell with a power supply. The existing plastic products are generally realized by firstly forming a main body structure and then installing a metal wire. Or the metal wire insert and the plastic main body are integrally formed in an injection molding mode.

When the plastic product is molded by adopting the mode of integrally injection molding the insert, a plurality of metal wires are required to be arranged under certain conditions, and the metal wires can not be contacted with each other generally, otherwise, short circuit can occur. Each metal wire is used as an insert and needs to be positioned in an injection mold. When a metal wire is available, the metal wire is not provided with a positioning structure or the structure cannot be completely positioned, and the metal wire cannot be connected with a main body structure into a whole through conventional integral injection molding of an insert.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to solve the technical problem of providing a multi-insert integrated injection molding type injection mold and an injection molding method which are high in insert positioning accuracy, convenient to position and convenient to disassemble and assemble inserts and slide blocks.

The present invention provides a multi-insert integrated injection mold for molding a plastic product, wherein the plastic product at least comprises a main body, and a first insert and a second insert which are integrally injection molded with the main body, the first insert has a first connecting portion and a first positioning portion, the second insert has a second connecting portion and a second positioning portion, and the injection mold comprises:

the fixed die is provided with an injection molding channel and comprises a fixed die plate and a fixed die core, and the fixed die core is detachably arranged on the fixed die plate;

the movable die is movably abutted against the fixed die and comprises a movable die plate and a movable die core, and the movable die core is detachably arranged on the movable die plate;

the core pulling mechanism is arranged along the circumferential direction of the fixed mold core or the movable mold core, the core pulling mechanism, the fixed mold core and the movable mold core surround a cavity for molding the plastic product, and the injection molding channel is communicated with the cavity;

the core pulling mechanism comprises a first sliding block and a first sliding seat, the first sliding block is detachably mounted on the first sliding seat, and the first connecting part and the second connecting part are detachably connected with the first sliding block; the movable mold core is provided with a third positioning part and a fourth positioning part close to the mold cavity, and the first positioning part and the second positioning part are respectively and movably abutted against the third positioning part and the fourth positioning part so as to cooperatively position the first insert and the second insert in the mold cavity.

Furthermore, the third positioning portion is sequentially provided with a first upper positioning surface, a left positioning surface and a first lower positioning surface along the circumferential direction of the first positioning portion, and the first positioning portion is movably attached to the first upper positioning surface, the left positioning surface and the first lower positioning surface;

the fourth positioning portion is sequentially provided with a second upper positioning surface, a right positioning surface and a second lower positioning surface along the circumferential direction of the second positioning portion, and the second positioning portion is movably attached to the second upper positioning surface, the right positioning surface and the second lower positioning surface.

Furthermore, a mounting groove with an upward opening is formed in the first sliding seat, the first sliding block is detachably mounted in the mounting groove, and a clamping part for clamping a manipulator is arranged on the first sliding block;

the manipulator can be clamped by the clamping part to take the first slide block out of the first slide seat.

Furthermore, the both sides of mounting groove all are equipped with ripples pearl screw, be equipped with on the first slider with the recess of ripples pearl screw one-to-one, the recess with the joint can be dismantled to ripples pearl screw.

The plastic product ejection mechanism comprises a product ejector pin and a sliding block ejector pin, and the product ejector pin is used for ejecting the plastic product; a plurality of through holes are formed in the bottom of the first sliding seat, and the sliding block ejector pin can penetrate through the through holes from bottom to top to eject the first sliding block out, so that the first sliding block is separated from the mounting groove.

Furthermore, the right positioning surface and the left positioning surface are arranged in parallel, the third positioning portion is provided with a first guide inclined surface along the first upper positioning surface, the left positioning surface and the first lower positioning surface, and the first guide inclined surface is inclined from bottom to top towards the side far away from the first positioning portion;

and the fourth positioning part is provided with a second guide inclined plane along the second upper positioning surface, the right positioning surface and the second lower positioning surface, and the second guide inclined plane gradually inclines away from the second positioning part from bottom to top.

Furthermore, the first connecting part is provided with two first plug pins, the first sliding block is provided with first slots corresponding to the two first plug pins one to one, and the two first plug pins are respectively detachably inserted into the two first slots;

the second connecting part is provided with two second plug pins, the first sliding block is provided with second slots corresponding to the two second plug pins in a one-to-one mode, and the two second plug pins are detachably inserted into the two second slots respectively.

Further, the first connecting portion is located at one end of the first insert, and the first positioning portion is located at one end, far away from the first connecting portion, of the first insert; the second connecting part is positioned at one end of the second insert, and the second positioning part is positioned at one end, far away from the second connecting part, of the second insert;

the middle part of the first insert and the middle part of the second insert are both provided with fixing holes, and after the plastic product is molded, the fixing holes are filled in the main body.

Furthermore, the core pulling mechanism further comprises a core pulling oil cylinder, a second sliding block and a third sliding block, the first sliding block, the second sliding block and the third sliding block are arranged along the circumferential direction of the movable mold core, and the movable mold core, the fixed mold core, the first sliding block, the second sliding block and the third sliding block surround to form the cavity;

the core-pulling oil cylinder is arranged on the fixed die plate and connected with the first sliding seat.

The invention solves the technical problem by adopting the technical scheme that the injection molding method of the multi-insert integrated injection molding type injection mold comprises the following steps:

connecting the first connecting part and the second connecting part to the first sliding block, and installing the first sliding block on the first sliding seat; the first positioning part is abutted against the third positioning part, and the second positioning part is abutted against the fourth positioning part;

the movable mould moves towards the side close to the fixed mould to carry out mould closing;

injecting the plastic into the cavity from the injection channel to fill the cavity;

after the plastic product is cooled for a preset time, integrally forming the main body, the first insert and the second insert into the plastic product; the movable mould moves towards the side far away from the fixed mould to open the mould; the core pulling mechanism performs core pulling action, the first sliding block retreats, and the first sliding block is separated from the first insert and the second insert;

and ejecting the plastic product, ejecting the first sliding block to separate the first sliding block from the first sliding seat, and taking down the first sliding block by a manipulator so as to install and mold the first insert and the second insert for next plastic product on the first sliding block.

Compared with the prior art, the invention has at least the following beneficial effects:

according to the invention, the first connecting part on the first insert and the second connecting part on the second insert are detachably connected to the first sliding block, the first positioning part on the first insert and the second positioning part on the second insert are respectively abutted against the third positioning part and the fourth positioning part, so that the first insert and the second insert are cooperatively positioned in the cavity of the injection mold through the first positioning part and the second positioning part, the transverse freedom degree and the longitudinal freedom degree of the first insert and the second insert are both limited, the positions of the first insert and the second insert are accurate and unique, the positioning precision is high, and the problem that a single first insert or a single second insert is inconvenient to position or cannot be positioned can be effectively solved. And after the first insert and the second insert are integrally injection-molded with the main body, other post-processing procedures are not required to be carried out on each insert.

According to the invention, a half-circle first guide inclined plane is arranged on the third positioning part along the circumferential direction of the first positioning part, a half-circle second guide inclined plane is arranged on the fourth positioning part along the circumferential direction of the second positioning part, so that the first insert and the second insert can be conveniently positioned on the third positioning part and the fourth positioning part from top to bottom, the first insert is abutted to the first upper positioning surface, the left positioning surface and the first lower positioning surface, and the second insert is abutted to the second upper positioning surface, the right positioning surface and the first lower positioning surfaceStatorThe position surface is abutted against the second lower positioning surface. The first sliding block is arranged in the mounting groove with the upward opening, and after the plastic product injection molding and core pulling mechanism core pulling are completed, the sliding block ejector pin pushes the first sliding block upwards, so that the mechanical arm is convenient to clamp on the clamping part, and the first sliding block is taken down from the first sliding seat. And after the first insert and the second insert are installed on the first sliding block, together with the first insert and the second insert, can be conveniently installed in the installation groove of the first sliding seat from top to bottom, and the mounting and dismounting are convenient.

Drawings

Fig. 1 is a schematic structural view of a plastic product (audio stand) molded by the injection mold of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 from another perspective;

FIG. 3 is a schematic view of the construction of the first insert and the second insert;

FIG. 4 is a schematic view of the overall structure of the injection mold of the present invention;

FIG. 5 is a schematic structural view of FIG. 4 with the stationary mold removed;

FIG. 6 is a schematic distribution diagram of the first slide and each slide block along the circumferential direction of the movable mold core;

FIG. 7 is a schematic view of the first insert and the second insert being installed in the first slider;

FIG. 8 is an exploded view of FIG. 7;

FIG. 9 is an exploded view of the first slider (along with the first insert and the second insert) and the first carriage;

FIG. 10 is a cross-sectional view of the first slider and first carriage assembled along the wave ball screw;

fig. 11 is an assembly schematic diagram of the ejection mechanism with the movable mold core, the first slide block and the first slide.

In the figure:

1. a plastic product; 10. a main body; 11. a first insert; 12. a second insert; 111. a first connection portion; 112. a first positioning portion; 121. a second connecting portion; 122. a second positioning portion; 111A, a first pin; 113. a fixing hole; 121A, a second pin;

2. fixing a mold; 20. fixing a template; 21. fixing a mold core;

3. moving the mold; 30. moving the template; 31. a movable mold core; 311. a third positioning part; 312. a fourth positioning part; 311A, a first upper positioning surface; 311B, a left positioning surface; 311C, a first lower positioning surface; 311D, a first guide slope; 312A and a second upper positioning surface; 312B, a right positioning surface; 312C and a second lower positioning surface; 312D, a second guide ramp;

4. a core-pulling mechanism; 40. a first slider; 41. a first slider; 42. a core-pulling oil cylinder; 43. a second slider; 44. a third slider; 401. mounting grooves; 402. a ball screw; 411. a clamping part; 412. a groove; 413. a first slot; 414. a second slot;

5. an ejection mechanism; 50. a product thimble; 51. and a sliding block thimble.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

It should be noted that all directional indicators (such as up, down, left, right, front, and back \8230;) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicators are changed accordingly.

Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a 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 "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1 to fig. 3, a plastic product 1 to be molded by the injection mold of the present invention, specifically, a sound stand, is further shown in fig. 2 by enlarging a part a of the plastic product 1. This sound support includes main part 10 and the first inserts 11 and the second inserts 12 with the integrative injection moulding of main part 10, and main part 10 is the plastics material, and first inserts 11 and second inserts 12 are the metal material to in connection with the power. The first insert 11 has a first connecting portion 111 and a first positioning portion 112, and the second insert 12 has a second connecting portion 121 and a second positioning portion 122. Specifically, the first connecting portion 111 is located at one end of the first insert 11, the first positioning portion 112 is located at the other end of the first insert 11, and the first connecting portion 111 includes two first pins 111A; the second connecting portion 121 is located at one end of the second insert 12, the second positioning portion 122 is located at the other end of the second insert 12, and the second connecting portion 121 includes two second pins 121A. In the specific use process of the sound box bracket, the two first pins 111A and the two second pins 121A extend into the same plug, so that the sound box bracket can be conveniently connected with a power supply.

Wherein, the middle part of the first insert 11 and the middle part of the second insert 12 are both provided with fixing holes 113, and after the plastic product 1 is molded, the fixing holes 113 are filled in the main body 10. That is, the body 10 is filled with plastic in the two fixing holes 113, so that the first insert 11 and the second insert 12 are reliably and fixedly connected with the body 10, and in the subsequent use process, the first pin 111A and the second pin 121A are ensured not to be loosened when being plugged with a power supply.

When the first insert 11 and the second insert 12 are both positioned as inserts in an injection mold, the first insert 11 can move to the right, and the second insert 12 can move to the left, both of which cannot meet the positioning requirements. While the first insert 11 and the second insert 12 are symmetrically arranged, the right-hand positioning of the first insert 11 can be assisted by the second insert 12, while the left-hand positioning of the second insert 12 can be assisted by the first insert 11. Through the cooperative positioning of the first insert 11 and the second insert 12, the positioning requirements of the first insert 11 and the second insert 12 are met, and after the integral injection molding is completed, the first insert 11 and the second insert 12 do not need to be separated.

Fig. 6 also shows the injection mold in an enlarged view at B, as shown in fig. 4 to 6. The utility model provides an integrative injection moulding injection mold of many inserts, mainly includes: the device comprises a fixed die 2, a movable die 3, a core-pulling mechanism 4 and an ejection mechanism 5.

The fixed die 2 is provided with an injection molding channel which is mainly arranged on a hot runner and used for injecting molten plastic. And the fixed mold 2 includes a fixed mold plate 20 and a fixed mold core 21, and the fixed mold core 21 is detachably mounted on the fixed mold plate 20. A plate member for fixing the hot runner and a top plate are further provided on the stationary platen 20. In the actual injection molding process, the fixed mold 2 is fixedly connected with a head plate of an injection molding machine, the head plate is not moved, and therefore the fixed mold 2 is also in a static state.

The movable mold 3 movably abuts against the fixed mold 2, the movable mold 3 comprises a movable mold plate 30 and a movable mold core 31, and the movable mold core 31 is detachably arranged on the movable mold plate 30. In the actual injection molding process, the movable mold 3 is fixedly connected with a middle plate of an injection molding machine, and the middle plate moves relative to the head plate, which is equivalent to the movable mold 3 moving relative to the fixed mold 2 to perform mold opening and closing actions. When the movable mold 3 is abutted against the fixed mold 2, the injection mold is closed; and when the movable mold 3 is separated from the fixed mold 2 and propped against the fixed mold, the injection mold is opened. The movable mold core 31 is detachably fixed on the movable mold plate 30 through a bolt, and the fixed mold core 21 is detachably fixed on the fixed mold plate 20 through a bolt, so that the disassembly, assembly and maintenance are convenient.

The core-pulling mechanism 4 is used for forming an undercut or a side hole of the plastic product 1 so as to prevent the injection mold from being incapable of normally opening the mold. The core-pulling mechanism 4 is arranged along the circumferential direction of the fixed mold core 21 or the movable mold core 31, the core-pulling mechanism 4, the fixed mold core 21 and the movable mold core 31 enclose a cavity for molding the plastic product 1, and the injection molding channel is communicated with the cavity. In this embodiment, the plastic products 1 molded by the injection mold are arranged in two rows, and two sound brackets are molded at one time, so that the structure is symmetrical, and only half of the plastic products are described in detail in this embodiment. Specifically, the core pulling mechanism 4 includes a first slide 40, a first slider 41, a core pulling cylinder 42, a second slider 43, and a third slider 44, the first slider 41, the second slider 43, and the third slider 44 are arranged along the circumferential direction of the movable mold core 31, the fixed mold core 21, the first slider 41, the second slider 43, and the third slider 44 enclose a cavity, and after the cavity is filled with molten plastic, the sound bracket of the present embodiment is formed. The core-pulling oil cylinder 42 is arranged on the fixed die plate 20 and connected with the first sliding seat 40, and the core-pulling oil cylinder 42 controls the first sliding seat 40 to slide back and forth so as to control the first sliding block 41 to perform core-pulling action or resetting action. The second slider 43 and the third slider 44 are respectively mounted on a second slide (not labeled) and a third slide (not labeled) and are driven to move by the inclined guide post, so that the second slider 43 and the third slider 44 move.

As shown in fig. 6 to 9, the first slider 41 is detachably mounted on the first sliding seat 40, and the first connecting portion 111 and the second connecting portion 121 are both detachably connected to the first slider 41; the movable mold core 31 is provided with a third positioning portion 311 and a fourth positioning portion 312 close to the mold cavity, and the first positioning portion 112 and the second positioning portion 122 movably abut against the third positioning portion 311 and the fourth positioning portion 312 respectively, so as to cooperatively position the first insert 11 and the second insert 12 in the mold cavity.

In an actual injection molding process, the first connecting portion 111 on the first insert 11 and the second connecting portion 121 on the second insert 12 are detachably connected to the first slider 41, the first positioning portion 112 on the first insert 11 and the second positioning portion 122 on the second insert 12 respectively abut against the third positioning portion 311 and the fourth positioning portion 312, so that the first insert 11 and the second insert 12 are cooperatively positioned in a cavity of an injection mold through the first positioning portion 112 and the second positioning portion 122, both the lateral freedom degree and the longitudinal freedom degree of the first insert 11 and the second insert 12 are limited, it is ensured that both the first insert 11 and the second insert 12 are accurate and unique in position, the positioning accuracy is high, and a problem that a single first insert 11 or a single second insert 12 is inconvenient to position or cannot be positioned can be effectively solved. After the first insert 11 and the second insert 12 are integrally injection-molded with the body 10, there is no need to perform another post-processing step on each of the inserts.

Specifically, the third positioning portion 311 is sequentially provided with a first upper positioning surface 311A, a left positioning surface 311B and a first lower positioning surface 311C along the circumferential direction of the first positioning portion 112, and the first positioning portion 112 is movably attached to the first upper positioning surface 311A, the left positioning surface 311B and the first lower positioning surface 311C; the fourth positioning portion 312 is sequentially provided with a second upper positioning surface 312A, a right positioning surface 312B and a second lower positioning surface 312C along the circumferential direction of the second positioning portion 122, and the second positioning portion 122 is movably attached to the second upper positioning surface 312A, the right positioning surface 312B and the second lower positioning surface 312C. It should be noted that, since the first insert 11 and the second insert 12 need to be ejected out of the injection mold in cooperation with the main body 10 after the injection molding of the plastic product 1 is completed, the first insert 11 and the second insert 12 can be ejected from bottom to top along with the plastic product 1 after the molding with the main body 10 is completed and the mold is opened.

The right positioning surface 312B and the left positioning surface 311B are parallel to each other, and the right positioning surface 312B faces the left positioning surface 311B. The third positioning portion 311 is provided with a first guiding inclined surface 311D along the first upper positioning surface 311A, the left positioning surface 311B and the first lower positioning surface 311C, and the first guiding inclined surface 311D is inclined from bottom to top gradually to the side far away from the first positioning portion 112. That is, for the first positioning portion 112, the first guiding inclined surface 311D gradually opens outward from bottom to top, and the bottom of the first guiding inclined surface 311D is connected to the first upper positioning surface 311A, the left positioning surface 311B and the first lower positioning surface 311C, so as to facilitate the installation of the first insert 11 on the third positioning portion 311 from top to bottom. Similarly, the fourth positioning portion 312 is provided with a second guiding inclined plane 312D along the second upper positioning plane 312A, the right positioning plane 312B and the second lower positioning plane 312C, and the second guiding inclined plane 312D is inclined from bottom to top gradually to the side far away from the second positioning portion 122. That is, for the second positioning portion 122, the second guiding inclined surface 312D gradually opens outward from bottom to top, and the bottom of the second guiding inclined surface 312D is connected to the second upper positioning surface 312A, the right positioning surface 312B and the second lower positioning surface 312C, so that the second insert 12 can be conveniently mounted on the fourth positioning portion 312 from top to bottom.

As shown in fig. 9-10, the first sliding base 40 is provided with a mounting groove 401 with an upward opening, the first sliding block 41 is detachably mounted in the mounting groove 401, and the first sliding block 41 is provided with a clamping portion 411 for clamping by a robot, and the clamping portion 411 includes two protrusions protruding upward; the manipulator can be clamped in the clamping portion 411 to take the first slider 41 out of the first slide carriage 40, and in the actual working process, the slider thimble 51 firstly ejects the first slider 41, the first slider 41 is disconnected from the first slide carriage 40, and then the manipulator is clamped in the clamping portion 411 to take the first slider 41 out. Wave ball screws 402 are arranged on two sides of the mounting groove 401, grooves 412 corresponding to the wave ball screws 402 one to one are formed in the first sliding block 41, and the grooves 412 and the wave ball screws 402 can be detachably clamped. Two wave ball screws 402 are respectively arranged on two sides of the mounting groove 401, and the first sliding block 41 is detachably and fixedly connected with the first sliding seat 40 through the four wave ball screws 402, so that the fixing is reliable, and the mounting and dismounting are convenient. It should be noted that the wave ball screw 402 is composed of a spring, a steel ball and a housing, the spring and the steel ball are installed in the housing, and both ends of the spring respectively abut against the steel ball and the housing. When the force for ejecting the first slider 41 is greater than the engaging force provided by the four springs, the steel ball retreats due to the ejecting force, the steel ball slides out of the groove 412, and the first slider 41 is disengaged from the first slider 40.

As shown in fig. 11, the injection mold further includes an ejection mechanism 5 movably disposed on the movable mold 3, the ejection mechanism 5 includes a product thimble 50 and a slider thimble 51, and the product thimble 50 is used for ejecting the plastic product 1; the bottom of the first sliding seat 40 is provided with a plurality of through holes, and the slider thimble 51 can penetrate through the through holes from bottom to top to eject the first slider 41, so that the first slider 41 is separated from the mounting groove 401. The ejection mechanism 5 further comprises an ejector pin fixing plate and an ejector pin mounting plate, the product ejector pin 50 and the slide block ejector pin 51 are mounted and fixed through the ejector pin fixing plate and the ejector pin mounting plate, and a pull rod on the injection molding machine pushes and pulls the ejector pin fixing plate to realize the cooperative motion of the slide block ejector pin 51 and the product ejector pin 50 to perform ejection action or ejector pin resetting.

In the actual injection molding process, the present embodiment: a half circle of first guiding inclined surface 311D is arranged on the third positioning portion 311 along the circumferential direction of the first positioning portion 112, a half circle of second guiding inclined surface 312D is arranged on the fourth positioning portion 312 along the circumferential direction of the second positioning portion 122, so that the first insert 11 and the second insert 12 can be conveniently positioned on the third positioning portion 311 and the fourth positioning portion 312 from top to bottom, the first insert 11 is enabled to abut against the first upper positioning surface 311A, the left positioning surface 311B and the first lower positioning surface 311C, and the second insert 12 abuts against the second upper positioning surface 312A, the right positioning surface 312B and the second lower positioning surface 312C. The first sliding block 41 is installed in the installation groove 401 with the upward opening, and after the injection molding of the plastic product 1 and the core pulling of the core pulling mechanism 4 are completed, the sliding block ejector pin 51 ejects the first sliding block 41 upwards, so that the mechanical arm can be clamped on the clamping portion 411 conveniently, and the first sliding block 41 can be taken down from the first sliding seat 40. And after the first insert 11 and the second insert 12 are mounted on the first sliding block 41, the first sliding block 41 together with the first insert 11 and the second insert 12 can be conveniently mounted in the mounting groove 401 of the first sliding base 40 from top to bottom, so that the assembly and disassembly are convenient.

Example two:

an injection molding method of a multi-insert integrated injection molding type injection mold adopts the multi-insert integrated injection molding type injection mold in the first embodiment, and the injection molding method also comprises the working principle of the injection mold in the first embodiment, and the injection molding method comprises the following steps:

the first step is as follows: connecting the first connection portion 111 and the second connection portion 121 to the first slider 41, specifically, the first slider 41 is provided with first slots 413 corresponding to the two first pins 111A one to one, and the two first pins 111A are respectively detachably inserted into the two first slots 413; the first sliding block 41 is provided with second slots 414 corresponding to the two second pins 121A one-to-one, and the two second pins 121A are detachably inserted into the two second slots 414 respectively, so as to complete the installation and fixation of the first insert 11 and the second insert 12. And the first slider 41 is mounted on the first slider 40; the first positioning portion 112 abuts against the third positioning portion 311, and the second positioning portion 122 abuts against the fourth positioning portion 312, so as to complete the resetting of the first slider 41.

The second step: the movable mould 3 moves towards the side close to the fixed mould 2, mould assembly is carried out until the movable mould 3 is propped against the fixed mould 2, the movable mould 3 does not move towards the side of the fixed mould 2 any more, the injection molding machine provides mould locking force, and the movable mould 3 and the fixed mould 2 are locked and fixed.

The third step: and molten plastic is injected into the cavity from the injection channel to fill the cavity.

The fourth step: after cooling for a preset time, the main body 10, the first insert 11 and the second insert 12 are integrally formed into a plastic product 1, namely a sound bracket; and the movable mold 3 moves towards the side far away from the fixed mold 2 to open the mold, and after the mold is opened to a preset distance, the movable mold 3 stops retreating. And the core pulling mechanism 4 performs core pulling action, the first sliding block 41 retreats, the first sliding block 41 is separated from the first insert 11 and the second insert 12, and the first insert 11 and the second insert 12 are left in the plastic main body 10. And the second slider 43 and the third slider 44 also perform the backward core back operation when the movable mold 3 retreats and opens the mold.

The fifth step: the product ejector pins 50 in the ejector mechanism 5 eject the plastic product 1, so that the plastic product 1 is separated from the driven mold core 31. And the first slider 41 is ejected by the slider ejector pin 51 in the ejection mechanism 5 to disconnect the first slider 41 from the first slider 40, and the robot takes down the first slider 41 to mount the first insert 11 and the second insert 12 for molding the next plastic product 1 on the first slider 41.

The above steps are repeated to perform the mass injection molding of the plastic product 1.

In this scheme, this injection mold can solve the inconvenient problem in single inserts location to first inserts 11 and the 12 collaborative positioning of second inserts, and positioning accuracy is high, the location is convenient, and the easy dismounting of each inserts.

Claims (10)

1. The utility model provides an integrative injection mold of many inserts for shaping plastic products, plastic products include at least the main part and with the integrative injection molding's of main part first inserts and second inserts, first inserts has first connecting portion and first location portion, the second inserts has second connecting portion and second location portion, its characterized in that, injection mold includes:

the fixed die is provided with an injection molding channel and comprises a fixed die plate and a fixed die core, and the fixed die core is detachably arranged on the fixed die plate;

the movable die movably abuts against the fixed die and comprises a movable die plate and a movable die core, and the movable die core is detachably arranged on the movable die plate;

the core pulling mechanism is arranged along the circumferential direction of the fixed mold core or the movable mold core, the core pulling mechanism, the fixed mold core and the movable mold core surround a cavity for molding the plastic product, and the injection molding channel is communicated with the cavity;

the core pulling mechanism comprises a first sliding block and a first sliding seat, the first sliding block is detachably mounted on the first sliding seat, and the first connecting part and the second connecting part are detachably connected with the first sliding block; the movable mold core is provided with a third positioning part and a fourth positioning part close to the mold cavity, and the first positioning part and the second positioning part are respectively and movably abutted against the third positioning part and the fourth positioning part so as to cooperatively position the first insert and the second insert in the mold cavity.

2. The multi-insert integrated injection molding mold according to claim 1, wherein the third positioning portion is provided with a first upper positioning surface, a left positioning surface and a first lower positioning surface in sequence along a circumferential direction of the first positioning portion, and the first positioning portion is movably attached to the first upper positioning surface, the left positioning surface and the first lower positioning surface;

the fourth positioning portion is sequentially provided with a second upper positioning surface, a right positioning surface and a second lower positioning surface along the circumferential direction of the second positioning portion, and the second positioning portion is movably attached to the second upper positioning surface, the right positioning surface and the second lower positioning surface.

3. The multi-insert integrated injection molding mold according to claim 1, wherein the first slide is provided with a mounting groove with an upward opening, the first slide block is detachably mounted in the mounting groove, and the first slide block is provided with a clamping portion for clamping by a manipulator;

the manipulator can be clamped by the clamping part to take the first slide block out of the first slide seat.

4. The multi-insert integrated injection molding type injection mold according to claim 3, wherein wave bead screws are arranged on two sides of the mounting groove, grooves corresponding to the wave bead screws in a one-to-one mode are formed in the first sliding block, and the grooves are detachably clamped with the wave bead screws.

5. The multi-insert-integrated injection molding mold according to claim 3, further comprising an ejection mechanism movably disposed on the movable mold, wherein the ejection mechanism comprises a product ejector pin and a slider ejector pin, and the product ejector pin is used for ejecting the plastic product; a plurality of through holes are formed in the bottom of the first sliding seat, and the sliding block ejector pin can penetrate through the through holes from bottom to top to eject the first sliding block out, so that the first sliding block is separated from the mounting groove.

6. The multi-insert integrated injection molding type injection mold according to claim 2, wherein the right positioning surface and the left positioning surface are arranged in parallel, the third positioning portion is provided with a first guide inclined surface along the first upper positioning surface, the left positioning surface and the first lower positioning surface, and the first guide inclined surface is gradually inclined from bottom to top to the side away from the first positioning portion;

and the fourth positioning part is provided with a second guide inclined plane along the second upper positioning surface, the right positioning surface and the second lower positioning surface, and the second guide inclined plane is gradually inclined from bottom to top away from the second positioning part side.

7. The multi-insert integrated injection molding mold according to claim 1, wherein the first connecting portion has two first pins, the first slider has first slots corresponding to the two first pins, and the two first pins are detachably inserted into the two first slots respectively;

the second connecting part is provided with two second plug pins, the first sliding block is provided with second slots which are in one-to-one correspondence with the two second plug pins, and the two second plug pins are detachably inserted into the two second slots respectively.

8. The multi-insert integrated injection molding mold of claim 1, wherein the first connecting portion is at an end of the first insert, and the first positioning portion is at an end of the first insert away from the first connecting portion; the second connecting part is positioned at one end of the second insert, and the second positioning part is positioned at one end, far away from the second connecting part, of the second insert;

the middle part of the first insert and the middle part of the second insert are both provided with fixing holes, and after the plastic product is molded, the fixing holes are filled in the main body.

9. The multi-insert integrated injection molding type injection mold according to claim 1, wherein the core pulling mechanism further comprises a core pulling oil cylinder, a second slider and a third slider, the first slider, the second slider and the third slider are arranged along the circumferential direction of the movable mold core, and the movable mold core, the fixed mold core, the first slider, the second slider and the third slider surround the cavity;

the core-pulling oil cylinder is arranged on the fixed die plate and connected with the first sliding seat.

10. An injection molding method of a multiple-insert-integrated injection molding mold, which employs the multiple-insert-integrated injection molding mold according to any one of claims 1 to 9, the injection molding method comprising:

connecting the first connecting part and the second connecting part to the first sliding block, and installing the first sliding block on the first sliding seat; the first positioning part abuts against the third positioning part, and the second positioning part abuts against the fourth positioning part;

the movable mould moves towards the side close to the fixed mould to carry out mould closing;

injecting the plastic into the cavity from the injection channel to fill the cavity;

after the plastic product is cooled for a preset time, integrally forming the main body, the first insert and the second insert into the plastic product; the movable mould moves towards the side far away from the fixed mould to open the mould; the core pulling mechanism performs core pulling action, the first sliding block retreats, and the first sliding block is separated from the first insert and the second insert;

and ejecting the plastic product, ejecting the first sliding block to separate the first sliding block from the first sliding seat, and taking down the first sliding block by a mechanical arm so as to install and mold the first insert and the second insert for next plastic product on the first sliding block.

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