CN212385908U - Injection mold with metal insert plastic part - Google Patents

Abstract

The utility model relates to an injection mold with a metal insert plastic part, wherein a mold core III is coaxially sleeved outside a mold core II, the mold core II penetrates out of the mold core III, the mold core III and a lower mold cavity are coaxially arranged, and the mold core I is coaxially contacted with the mold core II after penetrating through a subchannel; when the mold is closed, the left cavity and the right cavity are closed, and then the mold core I, the mold core II and the mold core III are surrounded to form an upper cavity, the upper cavity is communicated with the lower cavity, the mold core I forms a smooth bucket neck section, the mold core II forms a sawtooth section of the bucket neck, the upper section of the mold core III forms a plastic part bucket body, the middle section is used for accurately positioning an inner hole of the blade, and the lower section is used for determining the height of the blade in the middle section; the left cavity and the right cavity are spliced to form the outer surface of the plastic part; the lower cavity is used for forming the tail of the plastic part hopper. This accomplished characteristic structure shaping such as mould an internal surface fill neck, bucket body, fill tail, realized simultaneously taking out smoothly after the die sinking and mould a piece, the blade mold insert can conveniently penetrate core III before the compound die to put in the exactness in the tram position.

Description

Injection mold with metal insert plastic part

Technical Field

The utility model belongs to the technical field of the injection mold technique and specifically relates to an injection mold who has metal insert to mould piece is related to.

Background

The metal insert plastic part used in the industries of electronics, machinery, chemical engineering, medicine, plastics and the like is manufactured by applying an injection molding technology. The plastic part with the metal insert is embedded with the insert blade, and the product has 12 specifications according to the insert blade diameter series of 12 and 15-36. The plastic part is funnel-shaped, as shown in figure 1, and comprises a bucket neck 31-1, a bucket body 31-2, a bucket tail 31-3 and other structures, the material ABS + GF20 has beautiful inner and outer surfaces and no defects of flash, seam mark and the like. The insert blade 32 is a thin-wall sleeve type metal part, the coaxiality requirement is met when the insert and the plastic part are matched, and the control precision is 0.04 mm. Therefore, the plastic part has higher requirements on the die, (1) the plastic part is suitable for the order requirements of series products with multiple specifications; (2) the insert blade in the die is reliable in positioning and accurate in matching; (3) the plastic part is convenient and safe to take out and place the insert blade; (4) the mould realizes automatic demoulding. The traditional mould is difficult to meet the processing requirement of the plastic part.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to solve the problem that the traditional mould is difficult to meet the processing requirement of a plastic part with a metal insert used by a disposable prepuce cutting stitching instrument, the invention provides an injection mould with the plastic part with the metal insert.

The utility model provides a technical scheme that its technical problem adopted is: an injection mold having a metal insert molding comprising:

a pouring system: the pouring system comprises a sprue bush, and a main runner and a sub-runner are arranged on the sprue bush;

moving the mold: the movable die is positioned below the fixed die and comprises a concave die, a lower cavity is formed in the concave die, a core II and a core III are fixedly mounted on the concave die, the core III is coaxially sleeved outside the core II, the core II penetrates out of the core III, the core III and the lower cavity are coaxially arranged, and the core III is divided into an upper section, a middle section and a lower section;

fixing a mold: the pouring system is fixedly arranged on a fixed die, a shunt channel is arranged on the fixed die, the fixed die comprises a core I, and the core I is coaxially contacted with a core II after penetrating through the shunt channel;

a half mechanism: the half mechanism is positioned between the fixed die and the movable die and comprises a left slide block and a right slide block, a left sprue and a left cavity which are mutually communicated are formed in the left slide block, the left sprue is positioned right above the left cavity, the left sprue is communicated with the runner, a right sprue and a right cavity which are mutually communicated are formed in the right slide block, the right sprue is positioned right above the right cavity, and the right sprue is communicated with the runner;

when the mold is closed, the left cavity and the right cavity are closed, and then the mold core I, the mold core II and the mold core III are surrounded to form an upper cavity, the upper cavity is communicated with the lower cavity, the mold core I forms a smooth bucket neck section, the mold core II forms a sawtooth section of the bucket neck, the upper section of the mold core III forms a plastic part bucket body, the middle section is used for accurately positioning an inner hole of the blade, and the lower section is used for determining the height of the blade in the middle section; the left cavity and the right cavity are spliced to form the outer surface of the plastic part; the lower cavity is used for forming the tail of the plastic part hopper.

A push-out mechanism: the push-out mechanism comprises a push rod seat, a plurality of circular push rods and flat push rods are fixedly arranged on the push rod seat, the circular push rods are uniformly distributed along the circumference of the central axis of the plastic part, the action points of the circular push rods are all on the inner circular surface of the plastic part bucket body, and the top surfaces of the circular push rods are all attached to the inner circular surface of the plastic part bucket body; the number of the flat push rods is equal to that of the plastic bucket tails, the flat push rods and the bucket tails are arranged in a one-to-one correspondence mode, and the end face shape of each flat push rod is the same as the cross section of each bucket tail.

The utility model discloses an injection mold who has metal insert to mould a, when the design, because should mould a tube-shape similar to, ordinary wheeled runner form has been borrowed in the design, has arranged two wheeled subchannels. However, the wheel type gate pouring position usually has gate marks on the inner side surface of a plastic part, and the size and the appearance of the inner side surface of the plastic part are required and are not enough gate marks. Therefore, the pouring position of the pouring gate is improved and arranged at the end part of the plastic part, and the left pouring gate is positioned right above the left cavity and the right pouring gate is positioned right above the right cavity because the left cavity and the right cavity are spliced to form the outer surface of the plastic part, so that the inner side surface and the appearance of the plastic part cannot be influenced by the arrangement of the pouring gate; when designing the core, because the shape of moulding the piece is special, the utility model discloses design the core into modular structure, the core includes core I, core II and core III, and than core overall structure design, this kind of modular structure changes in processing, and the part precision is guaranteed easily. Through the core combined structure design, the forming of characteristic structures such as a bucket neck, a bucket body and a bucket tail on the inner surface of a plastic part is completed, meanwhile, the plastic part is taken out smoothly after the mould is opened, and a blade insert can conveniently penetrate into a core III before mould closing and is accurately placed at a correct position; because the plastic part is a long and thin round sleeve type deep cavity product, a half mechanism can be adopted to finish the molding of the outer surface of the plastic part and realize the demolding of the plastic part. When the mold is closed, the left slide block and the right slide block are spliced to form the outer surface of the plastic part, and the outer surface and the mold core form a mold cavity of the mold; when the mold is opened, the left and right slide blocks are opened to release the plastic part. The circular push rods are distributed on two sides of the bucket body reinforcing rib, the acting points are on the inner circular surface of the plastic bucket body, and the top surfaces of the circular push rods are attached to the inner circular surface of the plastic bucket body; the end surface shape of the flat push rod is the same as the cross section of the bucket tail, the flat push rod acts on the end surface of each bucket tail, push-out traces are left on the end surface of each bucket tail, the appearance quality is not influenced, more importantly, the acting force of the round push rod on a plastic part can be reduced, and the plastic part is prevented from being deformed and damaged at the acting point position of the push rod; the flat push rod and the round push rod are fixed on the push rod seat, and the push rod seat is used for shortening the length of the push rod and improving the rigidity of the push rod.

The plastic part with the metal insert used by the disposable prepuce cutting suturing device has various specifications, in order to save the manufacturing and processing cost of a mould, when designing the mould, the 12 specifications of series products are classified into 6 groups, each group has 2 specifications, the mould adopts a one-mould two-cavity layout, therefore, the branch channels are provided with two branch channels which are respectively positioned at two sides of the main channel, because each set of mould is provided with product cavities with two specifications, in order to realize that products with two specifications can be processed simultaneously or a product with one specification can be processed independently during injection molding, the sprue bush is sleeved with a steering valve, the steering valve is provided with a first flow guide channel, a second flow guide channel and a third flow guide channel which are communicated with each other, the first flow guide channel and the second flow guide channel are positioned on the same straight line, and the third flow guide channel vertically bisects a straight line formed by the first flow guide channel and the second flow guide channel. When a first flow guide channel and a second flow guide channel in the steering valve are respectively communicated with the two branch channels, the mold can simultaneously inject products with two specifications; when the third diversion channel is communicated with one of the runners, the utility model discloses a mould only moulds plastics the fashioned product of die cavity that this runner communicates

Further, the cover half still includes cover half bedplate, position circle and core fixed plate, position circle demountable installation is at the upper surface of cover half bedplate, core fixed plate fixed mounting is at the lower surface of cover half bedplate, the compound die guide way that is used for holding left slider and right slider is offered to core fixed plate lower surface, the through-hole that is used for holding the diverter valve is offered to the bottom of compound die guide way, the subchannel is seted up on the core fixed plate and is located the both sides of through-hole, I fixed mounting of core is on the core fixed plate, core I passes the subchannel back and laminates with II cores of core.

Further, the movable mould still includes movable mould bedplate, backing plate and movable mould board, the movable mould board passes through backing plate fixed mounting on the movable mould bedplate, the die fixed mounting is on the movable mould board, left side slider and right slider all slide and set up on the movable mould board.

The half mechanism further comprises a left inclined guide pillar, a right inclined guide pillar, a stop block and an abrasion-resistant plate, wherein the left inclined guide pillar and the right inclined guide pillar are fixedly arranged on the core fixing plate, a left guide inclined hole and a right guide inclined hole are formed in the movable die plate, and one end of the left inclined guide pillar penetrates through the left sliding block and then is inserted into the left guide inclined hole; one end of the right inclined guide post penetrates through the right sliding block and then is inserted into the right guide inclined hole, the two check blocks are fixedly mounted on the movable template, the two check blocks are respectively located on the sides of the left sliding block and the right sliding block and used for limiting the left sliding block and the right sliding block to excessively move out of the movable template, the two wear-resisting plates are respectively fixedly mounted on the left sliding block and the right sliding block, and when the die is closed, the two wear-resisting plates are respectively attached to the guide surfaces of the die closing guide grooves.

Further, the ejecting mechanism includes push pedal and deflector, the push pedal is located two between the backing plate, fixed mounting has the push rod fixed plate in the push pedal, push rod seat fixed mounting is on the push rod fixed plate, fixed mounting has the cab apron on the push rod seat, the below of die on the movable mould board of deflector fixed mounting, cab apron and deflector are all worn to establish in proper order by circle push rod and flat push rod.

In order to enable the fixed die and the movable die to run more stably, a guide assembly is further arranged between the fixed die and the movable die and comprises a guide sleeve and a guide pillar, the guide sleeve is fixedly installed on the core fixing plate, the guide pillar is fixedly installed on the movable die plate, and the guide pillar is coaxially inserted in the guide sleeve in a sliding mode.

In order to facilitate the resetting of the pushing mechanism, an elastic resetting mechanism is further arranged between the pushing mechanism and the movable die and comprises a resetting rod, one end of the resetting rod is fixedly installed on the push rod fixing plate, the other end of the resetting rod penetrates through the movable die plate, an elastic element is sleeved outside the resetting rod and is located between the movable die plate and the push rod fixing plate.

In order to enable the round push rod and the flat push rod to work stably, a positioning block is arranged between the movable die base plate and the pushing mechanism, the positioning block is fixedly installed on the movable die base plate, and the push plate and the push rod fixing plate are penetrated through by the positioning block in a sliding mode.

The half component forms a cavity of the die, so that the cooling of the half component needs to be considered to control the temperature of the die, and therefore, a left cooling water channel is formed in the left sliding block, and a right cooling water channel is formed in the right sliding block. However, the more cooling water paths, the better, the factors of product precision, molding cycle, processing difficulty and the like need to be comprehensively considered. Because the product molding cycle is short, a cooling water channel is respectively designed on the left and right sliding blocks, and the water channels surround the sliding block structure, so that the temperature of the mold can be effectively controlled to be 32.5-33.6.

The beneficial effects of the utility model are that, the utility model discloses an injection mold who has metal insert to mould piece, when the design, because should mould a tube-shape similar to, the design has borrowed ordinary wheeled runner form, has arranged two wheeled subchannels. However, the wheel type gate pouring position usually has gate marks on the inner side surface of a plastic part, and the size and the appearance of the inner side surface of the plastic part are required and are not enough gate marks. Therefore, the pouring position of the pouring gate is improved and arranged at the end part of the plastic part, and the left pouring gate is positioned right above the left cavity and the right pouring gate is positioned right above the right cavity because the left cavity and the right cavity are spliced to form the outer surface of the plastic part, so that the inner side surface and the appearance of the plastic part cannot be influenced by the arrangement of the pouring gate; when designing the core, because the shape of moulding the piece is special, the utility model discloses design the core into modular structure, the core includes core I, core II and core III, and than core overall structure design, this kind of modular structure changes in processing, and the part precision is guaranteed easily. Through the core combined structure design, the forming of characteristic structures such as a bucket neck, a bucket body and a bucket tail on the inner surface of a plastic part is completed, meanwhile, the plastic part is taken out smoothly after the mould is opened, and a blade insert can conveniently penetrate into a core III before mould closing and is accurately placed at a correct position; because the plastic part is a long and thin round sleeve type deep cavity product, a half mechanism can be adopted to finish the molding of the outer surface of the plastic part and realize the demolding of the plastic part. When the mold is closed, the left slide block and the right slide block are spliced to form the outer surface of the plastic part, and the outer surface and the mold core form a mold cavity of the mold; when the mold is opened, the left and right slide blocks are opened to release the plastic part. The circular push rods are distributed on two sides of the bucket body reinforcing rib, the acting points are on the inner circular surface of the plastic bucket body, and the top surfaces of the circular push rods are attached to the inner circular surface of the plastic bucket body; the end surface shape of the flat push rod is the same as the cross section of the bucket tail, the flat push rod acts on the end surface of each bucket tail, push-out traces are left on the end surface of each bucket tail, the appearance quality is not influenced, more importantly, the acting force of the round push rod on a plastic part can be reduced, and the plastic part is prevented from being deformed and damaged at the acting point position of the push rod; the flat push rod and the round push rod are fixed on the push rod seat, and the push rod seat is used for shortening the length of the push rod and improving the rigidity of the push rod.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic three-dimensional view of a plastic part;

fig. 2 is a three-dimensional schematic view of the present invention;

fig. 3 is a front view of the present invention;

fig. 4 is a top view of the present invention;

fig. 5 is a cross-sectional view taken at a-a of fig. 4 in accordance with the present invention;

fig. 6 is a cross-sectional view taken at B-B of fig. 4 in accordance with the present invention;

FIG. 7 is a three-dimensional schematic view of the present invention when the stationary mold is not installed;

FIG. 8 is a schematic three-dimensional relationship between the plastic part and the gate according to the present invention;

FIG. 9 is a three-dimensional schematic view of a mandrel according to the present invention;

fig. 10 is a three-dimensional schematic view of a steering valve according to the present invention;

FIG. 11 is a three-dimensional schematic view of a core plate according to the present invention;

fig. 12 is a three-dimensional schematic view of the left slider of the present invention;

fig. 13 is a three-dimensional schematic view of the right slider of the present invention;

fig. 14 is a three-dimensional schematic view of the middle moving die plate of the present invention;

fig. 15 is a three-dimensional schematic view of the ejector mechanism of the present invention;

FIG. 16 is a schematic three-dimensional assembly of the middle round push rod, the flat push rod and the push rod seat of the present invention;

fig. 17 is a top view of the female die of the present invention.

In the figure: 1. a sprue bush, 1-1 a main runner, 1-2 a sub-runner, 2 a female die, 2-1 a lower cavity, 3 a core II, 4 a core III, 4-1 an upper section, 4-2 a middle section, 4-3 a lower section, 5 a core I, 6 a left slide block, 6-1 a left sprue, 6-2 a left cavity, 7 a right slide block, 7-1 a right sprue, 7-2 a right cavity, 8 a push rod seat, 9 a round push rod, 10 a flat push rod, 11 a steering valve, 11-1 a first flow guide channel, 11-2 a second flow guide channel, 11-3 a third flow guide channel, 12 a seat plate, 13 a positioning ring, 14 a core fixing plate, 14-1 a die assembly guide groove, 14-2 a through hole, 15 a movable die seat plate, 16 a cushion plate, 17 a movable die plate, 17-1, a left guide inclined hole, 17-2, a right guide inclined hole, 18, a left inclined guide column, 19, a right inclined guide column, 20, a stop block, 21, an abrasion-resistant plate, 22, a push plate, 23, a guide plate, 24, a push rod fixing plate, 25, a transition plate, 26, a guide sleeve, 27, a guide column, 28, a reset rod, 29, an elastic element, 30, a positioning block, 31, a plastic piece, 31-1, a bucket neck, 31-2, a bucket body, 31-3, a bucket tail and 32, an insert blade.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

An injection mold with a metal insert plastic part as shown in fig. 2-17 comprises a pouring system, a movable mold, a fixed mold, a half mechanism and a push-out mechanism,

the pouring system comprises a sprue bush 1, and a main runner 1-1 and a sub-runner 1-2 are arranged on the sprue bush 1; the disposable foreskin cutting stitching instrument is provided with a metal insert plastic part 31 with multiple specifications, in order to save the manufacturing and processing cost of a mould, when the mould is designed, 12 specifications of series products are summarized and divided into 6 groups, each group has 2 specifications, the mould adopts a mould and two-cavity layout, therefore, two branch channels 1-2 are provided, the two branch channels 1-2 are respectively positioned at two sides of a main channel 1-1, because each set of mould is provided with product cavities with two specifications, in order to realize that when in injection molding, the products with two specifications can be processed simultaneously or the products with one specification can be processed independently, a steering valve 11 is sleeved outside a sprue bush 1, the steering valve 11 is provided with a first flow guide channel 11-1, a second flow guide channel 11-2 and a third flow guide channel 11-3 which are mutually communicated, the first flow guide channel 11-1 and the second flow guide channel 11-2 are positioned on the same straight line, the third flow guide channel 11-3 vertically bisects a straight line formed by the first flow guide channel 11-1 and the second flow guide channel 11-2. When a first guide channel 11-1 and a second guide channel 11-2 in the steering valve 11 are respectively communicated with two branch channels 1-2, the mold can simultaneously perform injection molding on products with two specifications; when the third diversion channel 11-3 is communicated with one of the sub-channels 1-2, the mold of the utility model only injects the product formed by the cavity communicated with the sub-channel 1-2; different shunting channels can be selected according to the requirement of an order. Here, two types of molds for forming 25 and 29 standard products are taken as examples. If the manufacturer order only purchases 25 standard products, the third diversion passage 11-3 can be oriented toward the 25 standard mold cavity by adjusting the direction of the diverter valve 11. At the moment, a third flow guide channel 11-3 of the steering valve 11 is in butt joint with a branch channel 1-2 at a mold cavity 25, the branch channel 1-2 is communicated, molten plastic can enter the mold cavity of the specification 25 through the branch channel 1-2 through a main channel 1-1 under certain pressure to form the product, the other branch channel 1-2 is not communicated, the molten plastic cannot flow into the mold cavity of the specification 29, and the product of the specification 29 cannot be subjected to injection molding. Similarly, if the manufacturer requires 29 gauge product, the third flow guide channel 11-3 is directed to the product mold cavity of that gauge. If the manufacturer orders to purchase 25 and 29 products with two specifications at the same time, the first flow guide channel 11-1 and the second flow guide channel 11-2 on the steering valve 11 can be respectively communicated with the two branch channels 1-2, and the two products can be molded at the same time.

The movable die is positioned below the fixed die and comprises a female die 2, a lower cavity 2-1 is formed in the female die 2, a core II 3 and a core III 4 are fixedly mounted on the female die 2, the core III 4 is coaxially sleeved outside the core II 3, the core II 3 penetrates out of the core III 4, the core III 4 and the lower cavity 2-1 are coaxially arranged, and the core III 4 is divided into an upper section 4-1, a middle section 4-2 and a lower section 4-3; the movable mould also comprises a movable mould base plate 15, a base plate 16 and a movable mould plate 17, the movable mould plate 17 is fixedly arranged on the movable mould base plate 15 through the base plate 16, the female mould 2 is fixedly arranged on the movable mould plate 17, and the left slide block 6 and the right slide block 7 are arranged on the movable mould plate 17 in a sliding mode.

The pouring system is fixedly arranged on the fixed die, the fixed die is provided with the sub-runners 1-2 and comprises a core I5, and the core I5 penetrates through the sub-runners 1-2 and then is in coaxial contact with a core II 3; the fixed die further comprises a fixed die base plate 12, a positioning ring 13 and a core fixing plate 14, the positioning ring 13 is detachably mounted on the upper surface of the fixed die base plate 12, the core fixing plate 14 is fixedly mounted on the lower surface of the fixed die base plate 12, a die assembly guide groove 14-1 used for containing the left slider 6 and the right slider 7 is formed in the lower surface of the core fixing plate 14, a through hole 14-2 used for containing the steering valve 11 is formed in the bottom of the die assembly guide groove 14-1, a subchannel 1-2 is formed in the core fixing plate 14 and located on two sides of the through hole 14-2, a core I5 is fixedly mounted on the core fixing plate 14, and the core I5 is attached to a core II 3 after passing.

The mold core adopts a combined structure and is formed by combining three parts, namely a mold core I5, a mold core II and a mold core III. Taking a product with the specification of 29 as an example, a core I5 forms a smooth section of a bucket neck 31-1, a core II 3 forms a sawtooth section of the bucket neck 31-1, a core III 4 is divided into an upper section, a middle section and a lower section, the upper section 4-1 forms a plastic part 31-2, the middle section 4-2 is used for accurately positioning an inner hole of a blade, the diameter size of the core is 28.25mm, and the fit clearance between the inner hole of the blade and the core is 0.02-0.04 mm, so that the clearance fit ensures that an operator conveniently penetrates an insert blade 32 into the core, and meanwhile, the inlay coaxiality precision of the insert blade 32 and the plastic part 31 is ensured. The diameter of the lower section 4-3 of the mold core III 4 is phi 29mm, which is slightly larger than the size of the inner hole of the blade, so that the height for placing the blade is determined at the middle section 4-2. The lower section 4-3 of the mold core is in interference fit with the female mold 2, so that the mold core III 4 is fastened on the female mold 2, and the mold core II 3 is embedded on the mold core III 4. Compared with the integral structure design of the mold core, the combined structure is easier to process, and the precision of parts is easy to guarantee. Through the core combined structure design, the forming of characteristic structures such as the bucket neck 31-1, the bucket body 31-2 and the bucket tail 31-3 on the inner surface of the plastic part 31 is completed, meanwhile, the plastic part 31 is taken out smoothly after the mold opening is carried out, and the blade insert can conveniently penetrate into the core III 4 before the mold closing and is accurately placed at the correct position.

The half mechanism is positioned between the fixed die and the movable die and comprises a left sliding block 6 and a right sliding block 7, a left guide chute and a right guide chute are formed in the female die 2, the left sliding block 6 is arranged in the left guide chute in a sliding mode, the right sliding block 7 is arranged in the right guide chute in a sliding mode, and the splicing precision of the left sliding block 6 and the right sliding block 7 directly influences the appearance of the plastic part 31.

The left slide block 6 is provided with a left sprue 6-1 and a left cavity 6-2 which are communicated with each other, the left sprue 6-1 is positioned right above the left cavity 6-2, the left sprue 6-1 is communicated with the runner 1-2, the right slide block 7 is provided with a right sprue 7-1 and a right cavity 7-2 which are communicated with each other, the right sprue 7-1 is positioned right above the right cavity 7-2, and the right sprue 7-1 is communicated with the runner 1-2; the plastic part 31 is similar to a cylinder, and the design refers to a common wheel type sprue form and arranges two wheel type sub-runners 1-2. However, the wheel gate pouring position usually has gate marks on the inner surface of the plastic part 31, and the size and appearance of the inner surface of the plastic part 31 are required and are not enough gate marks. Therefore, the pouring position of the pouring gate is improved and is arranged at the end part of the plastic part 31, the side surface of the pouring gate has radian and is in an inverted triangle shape, and the size of the upper and lower sections is 7.5mm²、0.6mm²And the different upper and lower section sizes can generate larger injection pressure difference, so that the viscosity of the material melt of the plastic part 31 can be reduced, the fluidity is increased, and the filling of the cavity is facilitated. The small end of the gate is only 0.6mm²The gate mark is small, and the appearance quality is improved.

The half mechanism further comprises a left inclined guide post 18, a right inclined guide post 19, a stop block 20 and an abrasion-resistant plate 21, wherein the left inclined guide post 18 and the right inclined guide post 19 are fixedly arranged on the core fixing plate 14, a left guide inclined hole 17-1 and a right guide inclined hole 17-2 are formed in the movable die plate 17, and one end of the left inclined guide post 18 penetrates through the left sliding block 6 and then is inserted into the left guide inclined hole 17-1; one end of a right inclined guide post 19 penetrates through the right slider 7 and then is inserted into the right guide inclined hole 17-2, two check blocks 20 are fixedly mounted on the movable die plate 17, the two check blocks 20 are respectively positioned at the sides of the left slider 6 and the right slider 7 and used for respectively limiting the left slider 6 and the right slider 7 from excessively moving out of the movable die plate 17, two wear-resisting plates 21 are respectively fixedly mounted on the left slider 6 and the right slider 7, and the two wear-resisting plates 21 are respectively attached to the guide surfaces of the die closing guide grooves 14-1 during die closing. The half component forms a cavity of the die, so that the cooling of the half component needs to be considered to control the temperature of the die, and therefore a left cooling water channel is formed in the left sliding block 6, and a right cooling water channel is formed in the right sliding block 7. However, the more cooling water paths, the better, the factors of product precision, molding cycle, processing difficulty and the like need to be comprehensively considered. Because the product molding cycle is short, a cooling water channel is respectively designed on the left and right sliding blocks 7, and the water channels surround according to the structural shape of the sliding blocks, so that the temperature of the mold can be effectively controlled between 32.5 and 33.6.

The pushing mechanism comprises a push rod seat 8, a plurality of circular push rods 9 and a flat push rod 10 are fixedly arranged on the push rod seat 8, the circular push rods 9 are uniformly distributed along the circumference of the central axis of the plastic part 31, the action points of the circular push rods 9 are all on the arc inner surface of the bucket body 31-2 of the plastic part 31, and the top surfaces of the circular push rods 9 are all attached to the arc inner surface of the bucket body 31-2 of the plastic part 31; the number of the flat push rods 10 is equal to that of the bucket tails 31-3 of the plastic parts 31, the plurality of flat push rods 10 and the plurality of bucket tails 31-3 are arranged in a one-to-one correspondence mode, and the end face shape of each flat push rod 10 is the same as the section of each bucket tail 31-3. The push-out mechanism comprises a push plate 22 and a guide plate 23, the push plate 22 is located between the two base plates 16, a push rod fixing plate 24 is fixedly mounted on the push plate 22, a push rod seat 8 is fixedly mounted on the push rod fixing plate 24, a transition plate 25 is fixedly mounted on the push rod seat 8, the guide plate 23 is fixedly mounted below the female die 2 on the movable die plate 17, and the transition plate 25 and the guide plate 23 are sequentially penetrated through by the round push rod 9 and the flat push rod 10. Considering that the length-diameter ratio of the plastic part 31 is large, particularly the length-diameter ratio of the head and neck reaches 4, and a plurality of rib plates are distributed, when the plastic part is molded and cooled, a large holding force is generated on the core, and the largest resistance of the plastic part 31 in demolding is obtained. Therefore, the pushing elements of the circular push rods 9 are designed, the pushing elements are distributed on two sides of the reinforcing rib of the bucket body 31-2, the diameter of the pushing elements is 3mm, 8 pushing elements are uniformly distributed, the acting points are arranged on the inner circular surface of the bucket body 31-2 of the plastic part 31, and the top surfaces of the circular push rods 9 are attached to the inner circular surface of the bucket body 31-2 of the plastic part 31. Meanwhile, the bucket tail 31-3 of the plastic part 31 is molded in the lower core, and as the bucket tail 31-3 is flat and 20 bucket tails are arranged in the circumferential direction, larger demoulding resistance can be generated. For this purpose, a flat push rod 10 is designed. The end face shape of the flat push rod 10 is the same as the cross section of the bucket tail 31-3, the flat push rod acts on the end face of each bucket tail 31-3, push-out traces are left on the end face of the bucket tail 31-3, the appearance quality is not influenced, more importantly, the acting force of the round push rod 9 on the plastic part 31 can be reduced, and the plastic part 31 is prevented from being deformed and damaged at the position of the acting point of the push rod. Set up the push rod seat 8, flat push rod 10 and round push rod 9 are all fixed on push rod seat 8, push rod seat 8 and push rod fixed plate 24, push pedal 22 fastening connection, in order to shorten the length of push rod, improve the rigidity of push rod, in order to improve release stability, set up deflector 23, flat push rod 10, round push rod 9 passes corresponding deflector 23 hole, fit clearance between them is at 0 ~ 0.01mm, through the processing of once clamping of walking the silk slowly, guarantee every flat push rod 10, round push rod 9 is the same with the clearance value of deflector 23, thereby guarantee when releasing and mould 31, mould 31 release more steadily.

A guide assembly is further arranged between the fixed die and the movable die, the guide assembly comprises a guide sleeve 26 and a guide pillar 27, the guide sleeve 26 is fixedly arranged on the core fixing plate 14, the guide pillar 27 is fixedly arranged on the movable die plate 17, and the guide pillar 27 is coaxially inserted in the guide sleeve 26 in a sliding manner.

An elastic reset mechanism is further arranged between the pushing mechanism and the movable die and comprises a reset rod 28, one end of the reset rod 28 is fixedly installed on the push rod fixing plate 24, the other end of the reset rod 28 penetrates through the movable die plate 17, an elastic element 29 is sleeved outside the reset rod 28, the elastic element 29 is located between the movable die plate 17 and the push rod fixing plate 24, and the elastic element is a compression spring.

A positioning block 30 is also arranged between the movable mold base plate 15 and the pushing mechanism, the positioning block 30 is fixedly arranged on the movable mold base plate 15, and the positioning block 30 penetrates through the push plate 22 and the push rod fixing plate 24 in a sliding manner.

The utility model discloses an injection mold who has metal insert to mould a, at the during operation, will the utility model discloses a mould mounting is on vertical injection machine to accomplish from injection moulding to taking out mould 31, laying the whole molding cycle of inserts, consequently moulded the vertical injection machine that 31 required total injection volumes had selected the 125 grams specification according to the shaping, and reformed transform the injection machine workstation, be equipped with two stations: a workpiece pick-and-place station and an injection molding station. According to the specification of the order, the direction of the steering valve 11 is selected, and the mould is installed on the injection machine. In the mold opening state, an insert can conveniently penetrate into a mold core and is placed at a designated step position, the mold is closed, when the mold is closed, a left mold cavity 6-2 and a right mold cavity 7-2 are closed to surround a mold core I5, a mold core II 3 and a mold core III 4 to form an upper mold cavity, the upper mold cavity is communicated with a lower mold cavity 2-1, a smooth section of a mold core I5 forming bucket neck 31-1 and a sawtooth section of a mold core II 3 forming bucket neck 31-1, an upper section 4-1 forming plastic part 31 bucket body 31-2 of the mold core III 4, a middle section 4-2 is used for accurately positioning an inner hole of a blade, and a lower section 4-3 is used for determining the height of the blade at the middle section 4-2; the left cavity 6-2 and the right cavity 7-2 are spliced to form the outer surface of the plastic part 31; the lower cavity 2-1 is used for molding the bucket tail 31-3 of the plastic part 31 to finish the injection molding process. When the mold is opened, firstly, the fixed mold part moves upwards, the left inclined guide post 18 drives the left slide block 6 to move along the left guide chute, the right slide block 7 moves along the right guide chute, the left slide block 6 and the right slide block 7 move back to back until the left slide block 6 and the right slide block 7 touch the stop block 20, at this time, the solidified material and the plastic part 31 are completely separated from the slide blocks, the push plate 22, the push rod fixing plate 24, the push rod seat 8 and other parts of the push mechanism complete the ejection action of the round push rod 9 and the flat push rod 10 under the action of the mold opening and closing system of the injection molding machine, the solidified material and the plastic part 31 are safely taken out. The injection molding cycle of the product is 40 seconds, and the time of each link is set as: the injection molding is carried out for 3 seconds, the mold opening is carried out for 2 seconds, the plastic part 31 is taken out for 2 seconds, the insert is placed for 3 seconds, the moving time of two stations is 30 seconds, the production beat is fast, the mold opening and closing space of the mold is small, the pressure is over 50Mpa when the mold is closed, if a universal one-station vertical injection machine is adopted, the whole molding cycle is completed, and the taking out of the plastic part 31 and the placing of the insert are inconvenient and unsafe. Through the improvement of the injection molding machine workbench, the plastic part 31 can be conveniently taken out of the lower die of the die at the station a within the set time, the insert is safely inserted into the core and placed at the designated position, and then the lower die of the die is automatically moved to the station b according to the set time to finish the die assembly injection molding.

In the design, because the plastic part 31 is similar to a cylinder, the design uses for reference the common wheel type sprue form, and two wheel type sub-runners 1-2 are arranged. However, the wheel gate pouring position usually has gate marks on the inner surface of the plastic part 31, and the size and appearance of the inner surface of the plastic part 31 are required and are not enough gate marks. Therefore, the pouring position of the pouring gate is improved and is arranged at the end part of the plastic part 31, and the outer surface of the plastic part 31 is formed after the left cavity 6-2 and the right cavity 7-2 are spliced, so that the left pouring gate 6-1 is positioned right above the left cavity 6-2, the right pouring gate 7-1 is positioned right above the right cavity 7-2, and the arrangement of the pouring gate does not influence the inner side surface and the appearance of the plastic part 31; when designing the core, because the shape of moulding 31 is special, the utility model discloses design the core into modular structure, the core includes core I5, core II 3 and core III 4, and than core overall structure design, this kind of modular structure changes in processing, and the part precision guarantees easily. Through the core combined structure design, the characteristic structure forming of the inner surface of the plastic part 31, such as the bucket neck 31-1, the bucket body 31-2, the bucket tail 31-3 and the like, is completed, meanwhile, the plastic part 31 is taken out smoothly after the mould opening is realized, and the blade insert can conveniently penetrate into the core III 4 before the mould closing and is accurately placed at the correct position; because the plastic part 31 is a slender round sleeve type deep cavity product, a half mechanism can be adopted to finish the outer surface forming of the plastic part 31 and realize the demoulding of the plastic part 31. When the mold is closed, the left slide block 6 and the right slide block 7 are spliced to form the outer surface of the plastic part 31, and the outer surface and the mold core form a mold cavity of the mold; when the mold is opened, the left and right sliders 7 are opened to release the plastic part 31. The circular push rods 9 are distributed on two sides of the reinforcing ribs of the bucket body 31-2, the action points are on the arc inner surface of the bucket body 31-2 of the plastic part 31, and the top surfaces of the circular push rods are attached to the arc inner surface of the bucket body 31-2 of the plastic part 31; the end surface shape of the flat push rod 10 is the same as the cross section of the bucket tail 31-3, the flat push rod acts on the end surface of each bucket tail 31-3, push-out traces are left on the end surface of the bucket tail 31-3, the appearance quality is not influenced, more importantly, the acting force of the round push rod 9 on the plastic part 31 can be reduced, and the plastic part 31 is prevented from being deformed and damaged at the position of the acting point of the push rod; the flat push rod 10 and the round push rod 9 are fixed on the push rod seat 8, and the push rod seat 8 is used for shortening the length of the push rod and improving the rigidity of the push rod.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (10)

1. The utility model provides an injection mold who has metal insert to mould piece which characterized in that: the method comprises the following steps:

a pouring system: the pouring system comprises a sprue bush (1), and a main runner (1-1) is arranged on the sprue bush (1);

moving the mold: the movable die is positioned below the fixed die and comprises a concave die (2), a lower cavity (2-1) is formed in the concave die (2), a core II (3) and a core III (4) are fixedly installed on the concave die (2), the core III (4) is coaxially sleeved outside the core II (3), the core II (3) penetrates out of the core III (4), the core III (4) and the lower cavity (2-1) are coaxially arranged, and the core III (4) is divided into an upper section (4-1), a middle section (4-2) and a lower section (4-3);

fixing a mold: the pouring system is fixedly arranged on a fixed die, a sub-runner (1-2) is arranged on the fixed die, the fixed die comprises a core I (5), and the core I (5) penetrates through the sub-runner (1-2) and then is in coaxial contact with a core II (3);

a half mechanism: the half mechanism is positioned between the fixed die and the movable die and comprises a left sliding block (6) and a right sliding block (7), the left sliding block (6) is provided with a left sprue (6-1) and a left cavity (6-2) which are communicated with each other, the left sprue (6-1) is positioned right above the left cavity (6-2), the left sprue (6-1) is communicated with the runner (1-2), the right sliding block (7) is provided with a right sprue (7-1) and a right cavity (7-2) which are communicated with each other, the right sprue (7-1) is positioned right above the right cavity (7-2), and the right sprue (7-1) is communicated with the runner (1-2);

when the mold is closed, the left cavity (6-2) and the right cavity (7-2) are closed, then the mold core I (5), the mold core II (3) and the mold core III (4) are surrounded to form an upper cavity, the upper cavity is communicated with the lower cavity (2-1), the mold core I (5) forms a smooth section of a bucket neck (31-1), the mold core II (3) forms a sawtooth section of the bucket neck (31-1), the upper section (4-1) of the mold core III (4) forms a plastic part (31), a bucket body (31-2), the middle section (4-2) is used for accurately positioning an inner hole of a blade, and the lower section (4-3) is used for determining the height of the blade at the middle section (4-2); the left die cavity (6-2) and the right die cavity (7-2) are spliced to form the outer surface of the plastic part (31); the lower cavity (2-1) is used for molding a hopper tail (31-3) of a plastic part (31);

a push-out mechanism: the push-out mechanism comprises a push rod seat (8), round push rods (9) and flat push rods (10) are fixedly installed on the push rod seat (8), the round push rods (9) are uniformly distributed along the circumference of the central axis of the plastic part (31), action points of the round push rods (9) are all arranged on the arc inner surface of the bucket body (31-2) of the plastic part (31), and top surfaces of the round push rods (9) are all attached to the arc inner surface of the bucket body (31-2) of the plastic part (31); the number of the flat push rods (10) is equal to that of the hopper tails (31-3) of the plastic part (31), the flat push rods (10) and the hopper tails (31-3) are arranged in a one-to-one correspondence mode, and the end face shape of the flat push rods (10) is the same as the section of the hopper tails (31-3).

2. The injection mold with a metal insert molding of claim 1, wherein: the sprue gate is characterized in that the number of the sub-runners (1-2) is two, the sub-runners (1-2) are respectively located on two sides of the main runner (1-1), a steering valve (11) is sleeved outside the sprue gate sleeve (1), a first flow guide channel (11-1), a second flow guide channel (11-2) and a third flow guide channel (11-3) which are communicated with each other are arranged on the steering valve (11), the first flow guide channel (11-1) and the second flow guide channel (11-2) are located on the same straight line, and the third flow guide channel (11-3) vertically bisects the straight line formed by the first flow guide channel (11-1) and the second flow guide channel (11-2).

3. The injection mold with a metal insert molding of claim 1, wherein: the fixed die also comprises a fixed die base plate (12), a positioning ring (13) and a core fixing plate (14), the positioning ring (13) is detachably arranged on the upper surface of the fixed die base plate (12), the core fixing plate (14) is fixedly arranged on the lower surface of the fixed die base plate (12), the lower surface of the core fixing plate (14) is provided with a die assembly guide groove (14-1) for accommodating a left slide block (6) and a right slide block (7), the bottom of the die closing guide groove (14-1) is provided with a through hole (14-2) for accommodating a steering valve (11), the sub-runners (1-2) are arranged on the core fixing plate (14) and are positioned at two sides of the through hole (14-2), the core I (5) is fixedly installed on the core fixing plate (14), and the core I (5) is attached to the core II (3) after penetrating through the sub-runners (1-2).

4. An injection mold having a metal insert molding according to claim 3, wherein: the movable mould still includes movable mould bedplate (15), backing plate (16) and movable mould board (17), movable mould board (17) are through backing plate (16) fixed mounting on movable mould bedplate (15), die (2) fixed mounting is on movable mould board (17), left side slider (6) and right slider (7) all slide and set up on movable mould board (17).

5. The injection mold with a metal insert molding according to claim 4, wherein: the half mechanism further comprises a left inclined guide post (18), a right inclined guide post (19), a stop block (20) and an abrasion-resistant plate (21), the left inclined guide post (18) and the right inclined guide post (19) are fixedly mounted on the core fixing plate (14), a left guide inclined hole (17-1) and a right guide inclined hole (17-2) are formed in the movable die plate (17), and one end of the left inclined guide post (18) penetrates through the left sliding block (6) and then is inserted into the left guide inclined hole (17-1); one end of the right inclined guide post (19) penetrates through the right slider (7) and then is inserted into the right guide inclined hole (17-2), the two check blocks (20) are fixedly mounted on the movable template (17), the two check blocks (20) are respectively located on the sides of the left slider (6) and the right slider (7) and used for respectively limiting the left slider (6) and the right slider (7) from excessively moving out of the movable template (17), the two wear-resisting plates (21) are respectively fixedly mounted on the left slider (6) and the right slider (7), and when the die is closed, the two wear-resisting plates (21) are respectively attached to guide surfaces of the die closing guide grooves (14-1).

6. The injection mold with a metal insert molding according to claim 4, wherein: ejecting mechanism includes push pedal (22) and deflector (23), push pedal (22) are located two between backing plate (16), fixed mounting has push rod fixed plate (24) on push pedal (22), push rod seat (8) fixed mounting is on push rod fixed plate (24), fixed mounting has cab apron (25) on push rod seat (8), deflector (23) fixed mounting is in the below of die (2) on movable mould board (17), cab apron (25) and deflector (23) are all worn to establish in proper order by circle push rod (9) and flat push rod (10).

7. The injection mold with a metal insert molding according to claim 4, wherein: a guide assembly is further arranged between the fixed die and the movable die and comprises a guide sleeve (26) and a guide pillar (27), the guide sleeve (26) is fixedly installed on the core fixing plate (14), the guide pillar (27) is fixedly installed on the movable die plate (17), and the guide pillar (27) is coaxially inserted in the guide sleeve (26) in a sliding mode.

8. The injection mold with a metal insert molding of claim 6, wherein: still be provided with elasticity canceling release mechanical system between ejecting mechanism and the movable mould, elasticity canceling release mechanical system includes release link (28), release link (28) one end fixed mounting is on push rod fixed plate (24), and movable mould board (17) are worn to establish by the other end, release link (28) overcoat is equipped with elastic element (29), elastic element (29) are located between movable mould board (17) and push rod fixed plate (24).

9. The injection mold with a metal insert molding of claim 6, wherein: still be provided with locating piece (30) between movable mould bedplate (15) and the ejecting mechanism, locating piece (30) fixed mounting is on movable mould bedplate (15), push pedal (22) and push rod fixed plate (24) are worn to establish in locating piece (30) slip.

10. The injection mold with a metal insert molding of claim 1, wherein: a left cooling water channel is formed in the left sliding block (6), and a right cooling water channel is formed in the right sliding block (7).

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