CN104369328A

CN104369328A - Injection mold automatically shearing disk-shaped sprue coagulation material in mold

Info

Publication number: CN104369328A
Application number: CN201410548324.9A
Authority: CN
Inventors: 宋满仓; 于文强; 张志强; 刘莹; 刘冲; 刘军山; 李经民
Original assignee: Dalian University of Technology
Current assignee: Dalian University of Technology
Priority date: 2014-10-15
Filing date: 2014-10-15
Publication date: 2015-02-25
Anticipated expiration: 2034-10-15
Also published as: CN104369328B

Abstract

The invention discloses an injection mold automatically shearing a disk-shaped sprue coagulation material in the mold, and belongs to the field of injection mold design and manufacture, wherein the injection mold is mainly composed of a sprue bushing, a fixed die insert block, a moving die insert block, a sprue punch, a push tube, a center push rod, a spacing ring, a support plate, a cylinder assembly and the like. An injection-molded disk-shaped sprue is formed by matching the sprue bushing and the sprue punch, the thickness of the disk-shaped sprue is generally 0.1-0.5 mm, and moreover, the depth of a groove matched with the sprue punch and designed on the end face of the sprue bushing is 1-5 mm. After injection pressure maintaining is finished, the sprue punch is driven to move forward by a gas cylinder to allow the sprue coagulation material to enter the sprue bushing groove, and the two components achieve a shearing action for cutting off the sprue coagulation material. The sprue coagulation material after cutting is stayed on the sprue punch due to an action of the sprue punch internally pushing a trough, and after the mold is opened, the sprue coagulation material is pushed out by the center push rod in the sprue punch. Compared with same-kind molds, the injection mold is more compact in structure and strong in versatility; and with application of the mold for molding a product, the product quality can be ensured, and economic benefits are improved.

Description

In a kind of mould, automatic shearing diaphragm gate coagulates the injection mold of material

Technical field

The invention belongs to Design and Manufacture of Plastic Injection Mould field, relate to automatic shearing diaphragm gate in a kind of mould and coagulate the injection mold of material.

Background technology

When using diaphragm gate moulded plastic products, in knockout course, cast gate coagulates material can not automatically and separation of products, therefore artificial or special cast gate of cutting is needed to coagulate materials device and carry out subsequent treatment, and this cast gate solidifying material cut-out mode is easy to cause damage to goods and affect product quality, and increases the amount of labour and extend manufacture cycle.For this reason, the mode that automatic shearing cast gate in mould can be adopted to coagulate material solves the problems referred to above.

Cut after the mode that in existing mould, automatic shearing cast gate coagulates material is mainly divided into die sinking with die sinking before cut two kinds of manner of execution.Cut after die sinking easily to produce goods and pull, cause cast gate to coagulate material and not easily cut off, more difficult for crisp and hard material excision, and goods are fragile.Cut before die sinking and mainly through mould inner cutter, material is coagulated to cast gate and carry out die-cut, but this needs along having tolerant space in the mould of die-cut direction to cut off the solidifying material of cast gate, corresponding mechanism must be manufactured and designed in mould for this reason and with cutting knife synchronization action, but this mechanism design manufacture so assembling comparatively complicated and need to control accurately, be mainly used in the product that shaping batch is larger, as CD, DVD CD; For general diaphragm gate moulded products, in the urgent need to one not only economy but also reliable mould inscribe gating apparatus.

Summary of the invention

The invention provides automatic shearing diaphragm gate in a kind of mould and coagulate the injection mold of material, be mainly used in the plastic products using diaphragm gate shaping, use this mould molding goods in die sinking front mould, the cut-out that cast gate coagulates material can be completed by one-off.

Technical scheme of the present invention is as follows:

In mould, automatic shearing diaphragm gate coagulates an injection mold for material, comprises solid plate, sprue bush, fixed die insert, moving die insert, moving platen, cast gate punching pin, ejector sleeve, center push rod, spacing ring, gripper shoe and cylinder assembly.The diaphragm gate of injection mo(u)lding to be coordinated with cast gate punching pin by sprue bush and is formed, diaphragm gate thickness 0.1 ~ 0.5mm, and on the end face of sprue bush, have the groove matched with cast gate punching pin, and provide melt compression space for cutting off cast gate, the degree of depth is 1 ~ 5mm.

Completing cast gate in mould, to coagulate the power resources that material automatically cuts off be cylinder assembly, its install on the supporting plate with the cylinder that its formation one is complete, wherein piston and piston rod integrated design manufacture composition cast gate punching pin.At the end of injection mo(u)lding pressurize, cylinder compressed air promotes piston and cast gate punching pin moves ahead, and cast gate punching pin enters sprue bush groove, and the two realizes shear action and cuts off the solidifying material of cast gate.Devise spacing ring between cast gate punching pin and gripper shoe, coagulate the stroke of material in order to adjust the die-cut cast gate of cast gate punching pin, its stroke is 0.2 ~ 0.6mm.Cast gate after cut-out coagulates material because drawing the effect of hopper to be detained on cast gate punching pin in cast gate punching pin, is released after die sinking by the center push rod in cast gate punching pin.The ejecting mechanism of goods adopts ejector sleeve, and it coagulates with cut-out cast gate and expects that cylinder uses the air intake duct in gripper shoe jointly, and this air intake duct completes the release of goods and the reset of cast gate punching pin simultaneously, and ejector sleeve utilizes spring reset.Add two alignment pins in the bottom of ejector sleeve, ejector sleeve moves back and forth as guiding, and ejector sleeve is located in circumference, thus makes cast gate punching pin circumference location, can be used for the shearing that profiled holes cast gate coagulates material.

Automatic shearing diaphragm gate of the present invention coagulates the injection mold of material, and structure is simple, reliable, highly versatile, is applicable to the diaphragm gate that molding gate sectional area is less.Sprue bush devises the groove matched with cast gate punching pin, provide and cut off compression stroke required when cast gate coagulates material, thus guarantee that cast gate coagulates material and is completely severed.Cast gate punching pin can circumference be located, and is applicable to the cut-out that non-circular complicated shape diaphragm gate coagulates material.The stroke of cast gate punching pin can obtain fine adjustment and control by spacing ring, can adjust guarantee to cut off quality when die trial.The power of die-cut action is compressed air, convenient sources, clean environment firendly.With cut-out cast gate is solidifying, the release of goods expects that cylinder uses an air intake duct jointly, make mould structure more compact, peripheral hardware controls simpler and more direct.Apply this mould can effectively improve the quality of products, reduce production cost, boost productivity.

Accompanying drawing explanation

Fig. 1 is moulded products sketch.

Fig. 2 is the injection mold scheme of erection that automatic shearing diaphragm gate coagulates material.

Fig. 3 is running gate system partial enlarged drawing.

In figure: 1 solid plate; 2 fixed die inserts; 3 moving die inserts; 4 moving platens; 5 gripper shoes;

6 cylinder barrels; 7 cylinder head; 8 center push rod; 9 back-moving springs; 10 cast gate punching pines; 11 spacing rings;

12 alignment pins; 13 ejector sleeves; 14 back-moving springs; 15 moulded products; 16 sprue bush.

Specific implementation method

Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.

Fig. 1 to Fig. 3 is a concrete case study on implementation of patent of the present invention.Formed in mould goods are a kind of dish-shaped micro-fluidic chip, as shown in Figure 1.Chip is designed with micro structure array, and as the partial structurtes drawn in Fig. 1, centre bore is irregularly-shaped hole, and molding gate adopts the diaphragm gate that sectional area is less.As shown in Figure 2, running gate system local detail is shown in Fig. 3 to die assembly relation.

Running gate system and die cavity are formed jointly by fixed die insert 2, moving die insert 3, sprue bush 16, cast gate punching pin 10, ejector sleeve 13 and center push rod 8, and wherein sprue bush 16 forms diaphragm gate with the axial gap of cast gate punching pin 10, and the thickness of cast gate is 0.2mm.The end face of sprue bush 16 devises the groove matched with cast gate punching pin 10, is of a size of 1mm, be used to provide and cut off cast gate and coagulate compression stroke needed for material.Completing cast gate in mould, to coagulate the power resources that material automatically cuts off be cylinder, and it is arranged on by cylinder barrel 6, cylinder head 7 and gripper shoe 5 is formed a complete cylinder.Cast gate punching pin 10 is positioned at cylinder and is made up of piston and piston rod, spacing ring 11 is provided with between cast gate punching pin 10 and gripper shoe 5, the height dimension of spacing ring is 5mm, and adjust by the height repairing spacing ring 11 stroke that the die-cut cast gate of cast gate punching pin 10 coagulates material, its stroke is 0.4mm.

Matched moulds injection, after pressurize terminates, compressed air enters cylinder by the air intake duct in cylinder head 7, promotes cast gate punching pin 10 and to move ahead the solidifying material of compression cast gate, completes diaphragm gate and coagulates being separated of material and moulded products, then through cooling die sinking.After die sinking, compressed air releases product by the air intake duct promotion ejector sleeve 13 in gripper shoe 5 makes cast gate punching pin 10 reset simultaneously; Goods stop air feed rear spring 14 that ejector sleeve 13 is resetted after releasing.Meanwhile, injection machine ejecting mechanism promotes center push rod 8 and completes running gate system and coagulate deviating from of material, after reset under the effect of spring 9.After matched moulds, cast gate punching pin 10 again coordinates with sprue bush 16 and forms cast gate, starts production cycle next time.

Claims

1. in mould, automatic shearing diaphragm gate coagulates an injection mold for material, it is characterized in that: this injection mold comprises solid plate, sprue bush, fixed die insert, moving die insert, moving platen, cast gate punching pin, ejector sleeve, center push rod, spacing ring, gripper shoe and cylinder assembly; The diaphragm gate of injection mo(u)lding to be coordinated with cast gate punching pin by sprue bush and is formed, and diaphragm gate thickness is 0.1 ~ 0.5mm, and on the end face of sprue bush, have the groove matched with cast gate punching pin, and the degree of depth is 1 ~ 5mm;

Completing cast gate in mould, to coagulate the power resources that material automatically cuts off be cylinder assembly, its install on the supporting plate with the cylinder that its formation one is complete, wherein piston and piston rod integrated design manufacture composition cast gate punching pin; At the end of injection mo(u)lding pressurize, cylinder compressed air promotes piston and cast gate punching pin moves ahead, and cast gate punching pin enters sprue bush groove, and the two realizes shear action and cuts off the solidifying material of cast gate; Devise spacing ring between cast gate punching pin and gripper shoe, coagulate the stroke of material in order to adjust the die-cut cast gate of cast gate punching pin, its stroke is 0.2 ~ 0.6mm; Cast gate after cut-out coagulates material because drawing the effect of hopper to be detained on cast gate punching pin in cast gate punching pin, is released after die sinking by the center push rod in cast gate punching pin; The ejecting mechanism of goods adopts ejector sleeve, and it coagulates with cut-out cast gate and expects that cylinder uses the air intake duct in gripper shoe jointly, and air intake duct completes the release of goods and the reset of cast gate punching pin simultaneously, and ejector sleeve utilizes spring reset; The bottom of ejector sleeve adds two alignment pins, and ejector sleeve moves back and forth as guiding, and ejector sleeve is located in circumference, thus makes cast gate punching pin circumference location, coagulates the shearing of material for profiled holes cast gate.