CN201907182U

CN201907182U - Sprue bushing for preventing gelatin silk drawing at water gap

Info

Publication number: CN201907182U
Application number: CN2010206609839U
Authority: CN
Inventors: 林志鹏; 李留季; 张运华
Original assignee: JIERONG MOLD INDUSTRY (DONGGUAN) CO LTD
Current assignee: Dongguan Chitwing Technology Co Ltd
Priority date: 2010-12-15
Filing date: 2010-12-15
Publication date: 2011-07-27
Anticipated expiration: 2020-12-15

Abstract

The utility model discloses a sprue bushing for preventing gelatin silk drawing at a water gap, comprising a sprue bushing with a tapered downsprue, wherein the downsprue penetrates through two ends of the sprue bushing along the axial direction to form a gel inlet and a gel outlet, the caliber of the gel inlet is less than the caliber of the gel outlet, and a spacer is arranged at the gel inlet. As the spacer is arranged at the gel inlet, a local blocking function of the spacer at the gel inlet is utilized for locally blocking the nozzle in front of a screw, partial plastic cement at the gel inlet can be blocked after plastic injection is stopped, so as to damage the forming conditions for gelatin silk drawing at the water gap, and preventing the gelatin silk drawing at the water gap from being generated when the downsprue is used for manufacturing plastic parts.

Description

The sprue bush of collodion silk is drawn at a kind of mouth of a river that prevents

Technical field

The utility model relates to the structural member on the injection moulding mode beer system mobile communication electronic product and the plastic mould field of outward appearance part, and in particular, what improvement related to is that the sprue bush of collodion silk is drawn at a kind of mouth of a river that prevents.

Background technology

The develop rapidly of wireless communication technology has promoted popularizing and using of mobile communication electronic product, and in the structural member and outward appearance part of mobile communication electronic product, has just comprised with the plastic parts product of injection moulding mode by plastic mould beer system.

With the mobile phone is example, and a large amount of plastic parts products tends to produce the phenomenon of " wire drawing " on the sprue top that beer is made product after the die sinking, and collodion silk is drawn at the mouth of a river that just is elongated.And this phenomenon also is difficult to avoid or improve by the accent machine.In present production process, can only blow methods such as high pressure gas with air gun and manually remove.

But, if the mouth of a river draws collodion silk to remove thoroughly inadequately, be adsorbed in the die cavity of product by releasing agent etc., will enter in the product that follow-up beer makes, and cause the waste product that has doubling or cold glue; In addition, untimely cleaning also can cause damage to the cavity surface of product.

Therefore, prior art still haves much room for improvement and develops.

The utility model content

The purpose of this utility model is, provides a kind of mouth of a river that prevents to draw the sprue bush of collodion silk, produces the mouth of a river in the time of can avoiding with down gate beer system plastic parts and draws collodion silk.

The technical solution of the utility model is as follows: the sprue bush of collodion silk is drawn at a kind of mouth of a river that prevents, comprises the sprue bush that has wedge sprue; The two ends that sprue runs through sprue bush vertically form glue-feeder and gum outlet; The bore of glue-feeder is less than the bore of gum outlet; Wherein: the place is provided with spacer at glue-feeder.

The sprue bush of collodion silk is drawn at the described mouth of a river that prevents, wherein: spacer is arranged on the center line of glue-feeder.

The sprue bush of collodion silk is drawn at the described mouth of a river that prevents, wherein: the end face at glue-feeder place is the arc surface of inner concavity; Spacer is along the arc surface setting.

The sprue bush of collodion silk is drawn at the described mouth of a river that prevents, wherein: the end face at glue-feeder place is provided with groove; Spacer is fixed in the groove.

The sprue bush of collodion silk is drawn at the described mouth of a river that prevents, wherein: spacer is welded in the groove.

The sprue bush of collodion silk is drawn at the described mouth of a river that prevents, wherein: the width range of spacer be arranged on the glue-feeder diameter 1/6 to 1/4 between.

The sprue bush of collodion silk is drawn at a kind of mouth of a river that prevents provided by the utility model, owing to adopted at the glue-feeder place spacer be set, utilize the local barrier effect of spacer at the glue-feeder place, nozzle before the screw rod is carried out part to be cut off, thereby can be after stopping injecting glue from the part plastic cement at disconnected glue-feeder place, destroyed the formation condition that collodion silk is drawn at the mouth of a river thus, produced the mouth of a river when having avoided and draw collodion silk with down gate beer system plastic parts.

Description of drawings

Fig. 1 is the axial cutaway view of the utility model sprue bush.

Fig. 2 is the left view of the utility model sprue bush Fig. 1.

The specific embodiment

Below with reference to accompanying drawing, the specific embodiment of the present utility model and embodiment are described in detail, described specific embodiment in order to explain the utility model, is not to be used to limit the specific embodiment of the present utility model only.

The sprue bush of collodion silk is drawn at a kind of mouth of a river that prevents of the present utility model, one of its specific embodiment, as shown in Figure 1, the sprue bush 100 that comprises a down gate formula, be provided with the sprue 110 that is communicated to sprue bush 100 both ends of the surface vertically in the inside of sprue bush 100, sprue 110 is tapered, forms glue-feeder 112 and gum outlet 111 at sprue bush 100 two ends; The bore of glue-feeder 112 is less than the bore of gum outlet 111; Wherein, be provided with spacer 114 at glue-feeder 112 places.

Compare with sprue bush 100 of the prior art, sprue bush 100 provided by the utility model, owing to adopted at glue-feeder 112 places spacer 114 be set, utilize the local barrier effect of spacer 114 at glue-feeder 112 places, nozzle before the screw rod is carried out part to be cut off, thereby after stopping injecting glue, can destroy the formation condition that collodion silk is drawn at the mouth of a river thus, produce the mouth of a river when having avoided and draw collodion silk with down gate beer system plastic parts from the part plastic cement at disconnected glue-feeder 112 places.

In preferred implementation of the present utility model, as shown in Figure 2, spacer 114 is arranged on the center line of glue-feeder 112.But the injection pressure of balance spacer 114 both sides is beneficial to the balanced depanning of multimode cavity product thus.Preferably, spacer 114 vertically is arranged on the plastic mould, and for spacer 114 horizontally sets, spacer 114 vertical settings can be from the disconnected melt plastic cement material that more flows out from nozzle.

Further, as shown in Figure 1, the end face at sprue bush 100 glue-feeders 112 places often is the arc surface 113 of inner concavity; Spacer 114 can be provided with along arc surface 113.Can make full use of thus arc surface 113 fixedly spacer 114 on sprue bush 100.

Concrete, the end face at glue-feeder 112 places is provided with groove; Spacer 114 is fixed in the groove.Because the sprue of sprue bush 100 inside is taper, the direction of taper is opposite with the direction that is injected into glue, and spacer 114 is difficult to be stuck in glue-feeder 112 places, so groove is set so that fixedly spacer 114 is easy and practical relatively on the end face at glue-feeder 112 places.

Preferably, spacer 114 can be welded in the groove; For example silver soldering, argon arc welding etc.In addition, also can adopt the fixing mode of screw, spacer 114 is fixed in the groove.

Further, as shown in Figure 1, the width range of spacer 114 can be arranged on glue-feeder 112 diameters 1/6 to 1/4 between.Spacer 114 is too wide, can have influence on to be injected into glue laminated power, causes product to be difficult to fill with; Spacer 114 is too narrow, is not easy to block the generation that collodion silk is drawn at the mouth of a river again.

Should be understood that; the above only is preferred embodiment of the present utility model; be not sufficient to limit the technical solution of the utility model; for those of ordinary skills; within spirit of the present utility model and principle; can be increased and decreased according to the above description, replacement, conversion or improvement; for example; with cross section is that circular isolation silk replacement cross section is the spacer 114 of rectangle etc.; and all these increases and decreases, replacement, conversion or improve after technical scheme, all should belong to the protection domain of the utility model claims.

Claims

1. one kind prevents that the mouth of a river from drawing the sprue bush of collodion silk, comprises the sprue bush that has wedge sprue; The two ends that sprue runs through sprue bush vertically form glue-feeder and gum outlet; The bore of glue-feeder is less than the bore of gum outlet; It is characterized in that: the place is provided with spacer at glue-feeder.

2. the sprue bush of collodion silk is drawn at the mouth of a river that prevents according to claim 1, and it is characterized in that: spacer is arranged on the center line of glue-feeder.

3. the sprue bush of collodion silk is drawn at the mouth of a river that prevents according to claim 1, it is characterized in that: the end face at glue-feeder place is the arc surface of inner concavity; Spacer is along the arc surface setting.

4. the sprue bush of collodion silk is drawn at the mouth of a river that prevents according to claim 1, and it is characterized in that: the end face at glue-feeder place is provided with groove; Spacer is fixed in the groove.

5. the sprue bush of collodion silk is drawn at the mouth of a river that prevents according to claim 4, and it is characterized in that: spacer is welded in the groove.

6. the sprue bush of collodion silk is drawn at the mouth of a river that prevents according to claim 1, it is characterized in that: the width range of spacer be arranged on the glue-feeder diameter 1/6 to 1/4 between.