CN217670815U - Glass fiber plastic injection molding ox horn sprue - Google Patents

Abstract

The utility model provides a glass fiber plastic injection molding oxhorn sprue, which comprises a sprue oxhorn runner, a sprue straight runner communicated with the sprue oxhorn runner and a sprue thimble vertical to the sprue straight runner, wherein a glue adding joint is arranged at the position where the sprue straight runner is connected with the sprue thimble; and the injection molding cooling speed of the joint area where the glue adding joint is located is lower than that of the other areas of the glass fiber plastic injection molding ox horn sprue. The utility model discloses a design plastic joint utilizes the cooling time difference for the runner takes place great deformation at ejecting in-process, thereby realizes the smooth drawing of patterns of runner, realizes moulding plastics continuous production, and has prolonged the mould life-span.

Description

Glass fiber plastic injection molding ox horn sprue

Technical Field

The utility model relates to an injection mold technical field, more specifically relates to a fine plastic ox horn runner of moulding plastics of glass.

Background

The sprue, also called the feed inlet, is a channel connecting the runner and the cavity melt. The proper gate selection is directly related to whether the injection molded product can be injection molded with good quality. The gate position is decisive for the shape of the melt flow front and the effect of the dwell pressure and, therefore, also for the strength and other properties of the injection-molded article.

In the design of injection mold, according to the structural form and characteristics of the gate, the common gate forms include a submarine gate and a spot gate.

The submarine gate is flexible in position and can be filled with glue on the inner surface and the outer surface of a plastic product. The runner is arranged on the parting surface, the sprue is submerged under the parting surface, and the molten material obliquely enters the cavity. Because the plastic product and the runner are respectively provided with the pushing-out mechanisms, the sprue is automatically cut off when the mold is opened, and the runner condensate automatically falls off. Meanwhile, the mold structure is simpler than that of a three-plate mold, the production efficiency is greatly improved, and the cost can be reduced. However, the submarine gate is not suitable for plastic which is too tough (such as pure PEEK, PEI, PPS, PC, and PA) or too brittle (such as various glass fiber reinforced resins), the former is not easy to cut (after cutting, the gate area has larger residual materials, post-treatment may be needed according to the product quality requirement, and a gate repairing process is added), the latter is easy to break and block the gate, and the gate has higher hardness, so that the reaction force to the gate insert of the mold is larger, and the service life of the gate insert is shorter.

The point gate is suitable for cylindrical, shell and box shaped plastic products. For larger flat plastic products, a plurality of point gates can be arranged, and the positions are flexibly arranged so as to reduce the warping deformation; for thin-wall plastic products, the shearing rate near the gate is too high, the residual stress is large, the thin-wall plastic products are easy to crack, and the wall thickness at the gate can be locally increased. The position of the point gate is limited slightly, gate traces are small, and the gate can be automatically broken when the die is opened, so that the automatic operation is facilitated. However, the disadvantages are that the injection pressure is large (pressure loss is large), a three-plate mold structure is required in most cases, the mold is relatively complicated, the molding cycle is long, the flow passage occupies a large area, and the material is wasted.

In the prior art, due to the limitation of the structure of a customer product, a submarine gate cannot meet the requirement; the point runner can influence product appearance and the mould structure is comparatively complicated, poor stability, and extravagant material moreover, ox horn runner is the optimal solution under this condition, and need not runner aftertreatment. In consideration of the product strength, a glass fiber reinforced material must be selected, but the glass fiber reinforced material has a very high elastic modulus (for example, PC +20% glass fiber, the elastic modulus is 7050 Mpa), and is not easy to deform, so that when the ox horn gate is broken, the gate cannot be effectively deformed and remains in the gate insert, and the service life of the ox horn gate insert is short, so that the effective continuous production cannot be realized.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the utility model aims at providing a fine plastic ox horn runner of moulding plastics of glass to solve the fine reinforcing material ox horn runner material of current glass and be too hard, at the easy problem of breaking of drawing of patterns formula.

Specifically, the glass fiber plastic injection molding oxhorn sprue provided by the utility model comprises a sprue oxhorn runner, a sprue straight runner communicated with the sprue oxhorn runner and a sprue thimble vertical to the sprue straight runner, wherein a glue adding joint is arranged at the position where the sprue straight runner is connected with the sprue thimble; and the injection molding cooling speed of the joint area where the glue adding joint is located is lower than that of the other areas of the glass fiber plastic injection molding ox horn sprue.

The glass fiber plastic injection molding oxhorn gate is formed by mixing and injection molding of PC or PA and glass fiber plastic.

The optional scheme is that the mixing proportion of the glass fiber plastic in the glass fiber plastic injection molding oxhorn sprue is 15% -35%.

The optional scheme is that the injection molding cooling speed of the joint area where the glue adding joint is located is 50% -75% of the injection molding cooling speed of other areas of the glass fiber plastic injection molding horn gate.

The front end part of the sprue oxhorn runner is provided with an oxhorn glue inlet, and the sprue oxhorn runner is communicated with the product cavity through the oxhorn glue inlet.

Wherein, the cross section of the ox horn glue inlet is round or oval optionally.

Wherein, optional scheme is, the rear end intercommunication injecting glue passageway of the straight runner of runner, the rear end of runner ox horn runner with the front end intercommunication of the straight runner of runner supplies the fluid of moulding plastics to form ox horn runner body, the upper portion of runner thimble with the bottom of ox horn runner body can be released fixedly.

Optionally, the glue adding joint is wrapped around the periphery of a position where the sprue straight runner is connected with the sprue thimble.

The sprue straight runner and the sprue ox horn runner are of an integrated structure.

From the above description, the utility model provides a fine plastic ox horn runner of moulding plastics of glass utilizes the cooling time difference through designing the plastic joint for the runner takes place great deformation at ejecting in-process, thereby realizes the smooth drawing of patterns of runner, realizes moulding plastics continuous production, and has prolonged the mould life-span.

Drawings

Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description and appended claims, taken in conjunction with the accompanying drawings.

In the drawings:

fig. 1 is a schematic view of a structure of a glass fiber plastic injection molded ox horn gate according to an embodiment of the present invention;

fig. 2 is a schematic view showing the ejection of the gate of the ox horn gate for injection molding of glass fiber plastic according to the embodiment of the present invention.

Wherein the reference numerals include: the sprue oxhorn runner gate structure comprises a sprue oxhorn runner 1, a oxhorn glue inlet 11, a sprue straight runner 2, a sprue thimble 3, a glue adding joint 4, a sprue insert 5 and a product cavity 51.

The same reference numbers in all figures indicate similar or corresponding features or functions.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In order to improve the holistic deformation demand of runner on the basis of reinforcing runner stability and product strength, improve the runner and go into son stability and mould life-span, the utility model discloses when adopting the fine reinforcing material of glass, through the plastic joint at the ejecting position design thickening of runner, utilize the cooling time difference for the runner takes place great deformation at ejecting in-process, thereby realizes the smooth drawing of patterns of runner, realizes moulding plastics continuous production, and has prolonged the mould life-span.

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is according to the utility model discloses fine plastic ox horn runner structure schematic diagram of glass moulds plastics, fig. 2 is according to the utility model discloses the fine plastic ox horn runner of moulding plastics of glass's runner is ejecting the schematic diagram.

As shown in fig. 1 and fig. 2, the glass fiber plastic injection molding oxhorn gate provided by the present invention comprises a gate oxhorn runner 1, a gate straight runner 2 communicated with the gate oxhorn runner 1, and a gate thimble 3 perpendicular to the gate straight runner 2, wherein a glue adding joint 4 is arranged at a position where the gate straight runner 2 is connected with the gate thimble 3; the glue adding joint 4 increases the whole thickness of the position where the straight runner flow channel 2 of the pouring gate is connected with the pouring gate thimble 3, so that the injection molding cooling speed of the joint area where the glue adding joint 4 is located is lower than the injection molding cooling speed of other areas of the glass fiber plastic injection molding ox horn pouring gate, namely, under the same cooling time (the pouring gate area reaches ejection temperature), the plastic of the joint area is not completely frozen, the pouring gate thimble is ejected at the moment, so that the pouring gate is deformed at the joint area (the plastic of the joint is not completely frozen, the modulus is lower, and the large deformation can be generated), then the ox horn pouring gate rotates around the joint, and the ox horn pouring gate is smoothly separated from the pouring gate insert 5, so that smooth demolding can be completed.

The utility model discloses a fine plastic ox horn runner of moulding plastics of glass can be moulded plastics by PC (polycarbonate, PC plastics for short, is a tough thermoplastic resin) or PA (Polyamide, commonly known as nylon) and the mixing of fine plastic of glass and forms of moulding plastics, and wherein, the fine plastic of glass mixes the proportion of glass fine plastic in moulding plastics ox horn runner of glass is 15% ~ 35%, and its content can be 15%, 20%, 25%, 30%, 35%.

In a specific embodiment of the present invention, the glass fiber with PC +20% is selected as the injection molding material. The PA +25% glass fiber can also be selected as an injection molding material, and the selection of the specific material and the proportion can be determined according to the type of the material and the thickness of the ox horn sprue. It should be noted that the mixing ratio of the glass fiber plastic is not too high, so as to avoid fracture caused by over hardness and insufficient deformation when the sprue thimble is ejected due to over high rigidity of the injection molded ox horn interface.

Specifically, in a specific embodiment of the present invention, the cooling rate of the injection molding in the joint region where the glue-adding joint is located is 50% -75% of the cooling rate of the injection molding in other regions (gate ox horn runner, gate straight runner region) of the glass fiber plastic injection molding ox horn runner.

The front end part of the sprue oxhorn runner is provided with an oxhorn glue inlet 11, the sprue oxhorn runner 1 is communicated with a product cavity 51 of the sprue insert 5 through the oxhorn glue inlet 11, the rear end of the sprue straight runner 2 is communicated with a glue injection channel (not shown in the figure), and the rear end of the sprue oxhorn runner 1 is communicated with the front end of the sprue straight runner 2 to form an oxhorn runner body through common injection molding. And injection molding fluid sequentially passes through the glue injection channel, the sprue straight runner 2, the sprue oxhorn runner 1 and the oxhorn glue inlet 11 and is injected into the product cavity 51, and the upper part of the sprue thimble 3 is fixed with the bottom of the oxhorn sprue body in a releasable manner.

The ox horn glue inlet 11 can be designed into an opening with a circular or oval cross section so as to enlarge and smoothen the window of the injection molding production process as much as possible and improve the stability of the quality of the injection molding product. The utility model discloses an among the concrete embodiment, enter the ox horn and glue the cross section design of mouth and be long 12mm, wide 2 mm's rectangular form oval to increase the ox horn and advance the tangent plane of gluing mouth 11 and advance gluey volume, make the fluid of moulding plastics can be more stable be poured into product die cavity is until being full of completely the product die cavity has reduced injection moulding's pressure, and then has reduced the probability that injection moulding product produced the defect.

In order to keep the deformation of the joint area consistent, the glue adding joint can be uniformly wrapped on the periphery of the position where the sprue straight runner 2 is connected with the sprue thimble 3, and the glue adding joint 4, the sprue straight runner 2 and the sprue oxhorn runner 1 are molded into an integral structure so as to enhance the stability of the oxhorn runner body.

Use the utility model discloses a glass fine plastic ox horn runner injection moulding product that moulds plastics, the fluid of moulding plastics flows in by the injecting glue passageway earlier straight runner 2 of runner is in proper order through runner ox horn runner 1 with ox horn advances to glue mouthful 11 and pours into in the product die cavity 51, be full of wholly when the fluid of moulding plastics behind the product die cavity, the injecting glue passageway stops to pour into the fluid of moulding plastics into in the straight runner 2 of runner, treats the fluid cooling back of moulding plastics in runner ox horn runner 1 and the straight runner 2 of runner, because the colloid in the joint 4 place region of gluing is thick, its cool time is longer than the fluid's that moulds plastics cooling time in runner ox horn runner 1 and the straight runner 2 of runner. That is to say, in the process of injection molding, under the same cooling time, the plastic in other areas of the ox horn gate body is frozen, but the cooling of the area where the glue adding joint 4 is located is slower, and the plastic is not completely frozen.

Therefore, the area where the glue adding joint 4 is located is low in modulus due to incomplete cooling and freezing, and can generate large deformation relative to the areas of the sprue oxhorn runner channel 1 and the sprue straight runner channel 2, at the moment, the rear part of the oxhorn runner body is ejected out of the sprue straight runner channel 2 through upward movement of the sprue thimble 3, the sprue straight runner channel 2 has a larger deformation space due to incomplete cooling of the glue adding joint 4, the sprue straight runner channel 2 is partially bent and deformed upwards, the oxhorn runner body completes smooth demolding through rotating movement around the glue adding joint 4, and the front part of the oxhorn runner body is arranged inside the oxhorn runner insert 5 in a submerged manner due to the sprue oxhorn runner channel 1, and then the front portion of ox horn runner body can be along with runner thimble 3 upwards moves and follows the rear portion of runner ox horn runner 1 is taken out, and the front end of ox horn runner body is because runner ox horn runner 1 and product die cavity 51 only have the ox horn to advance this less connecting portion of jiao kou 11 when taking out, so ox horn runner body just by when runner thimble 3 is ejecting 1-3mm, straight runner 2 of runner is buckled and is applyed the effort buffering to runner ox horn runner 1 and ox horn and advance jiao kou 11, and the ox horn that is advanced jiao kou 11 position automatic and injection moulding product and break, makes the smooth drawing of patterns of runner to can realize moulding plastics continuous production, and prolong the mould life.

When the ox horn sprue body is ejected, the sprue straight runner 2 is still fixed with the sprue ejector pin 3 in a releasable manner, and the manipulator can grab and separate the ox horn sprue body from the sprue ejector pin 3, so that a product can be directly conveyed to the next procedure by using a conveying belt, and the automation of injection molding is realized.

According to the technical scheme, the utility model provides a fine plastic of glass ox horn runner of moulding plastics through the plastic joint at the ejecting position design thickening of runner, utilizes the cooling time difference for the runner takes place great deformation at ejecting in-process, thereby realizes the smooth drawing of patterns of runner, realizes moulding plastics continuous production, and has prolonged the mould life-span.

The glass fiber plastic injection molding horn gate according to the present invention is described above by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various modifications can be made to the injection molding oxhorn gate made of the glass fiber plastic provided by the present invention without departing from the scope of the present invention. Therefore, the scope of the present invention should be determined by the content of the appended claims.

Claims (9)

1. A glass fiber plastic injection molding oxhorn sprue comprises a sprue oxhorn runner, a sprue straight runner communicated with the sprue horn runner and a sprue thimble vertical to the sprue straight runner,

a glue adding joint is arranged at the position where the sprue straight runner is connected with the sprue thimble; and the number of the first and second groups is,

and the injection molding cooling speed of the joint area where the glue adding joint is located is lower than the injection molding cooling speed of other areas of the glass fiber plastic injection molding ox horn sprue.

2. The glass fiber plastic injection molding oxhorn gate of claim 1, wherein the glass fiber plastic injection molding oxhorn gate is formed by mixing and injection molding of PC or PA and glass fiber plastic.

3. The glass fiber plastic injection molding oxhorn gate of claim 2, wherein the mixing ratio of the glass fiber plastic in the glass fiber plastic injection molding oxhorn gate is 15% to 35%.

4. The glass fiber plastic injection molding oxhorn gate of claim 1, wherein the injection cooling rate of the joint area where the glue joint is located is 50% to 75% of the injection cooling rate of the other areas of the glass fiber plastic injection molding oxhorn gate.

5. The glass fiber plastic injection molding oxhorn gate of claim 1, wherein the front end part of the sprue oxhorn runner is provided with an oxhorn glue inlet, and the sprue oxhorn runner is communicated with the product cavity through the oxhorn glue inlet.

6. The glass fiber plastic injection molding oxhorn gate of claim 5, wherein the cross section of the oxhorn glue inlet is circular or elliptical.

7. The glass fiber plastic injection molding oxhorn gate of claim 1, wherein the rear end of the gate straight runner is communicated with the glue injection channel, the rear end of the gate oxhorn runner is communicated with the front end of the gate straight runner for injection molding fluid to form an oxhorn gate body, and the upper part of the gate thimble is detachably fixed with the bottom of the oxhorn gate body.

8. The glass fiber plastic injection molding oxhorn sprue according to any one of claims 1-7, wherein the glue adding joint is wrapped around the periphery of the position where the sprue straight runner is connected with the sprue thimble.

9. The glass fiber plastic injection molding oxhorn gate of claim 8, wherein the glue adding joint is integrated with the gate straight runner and the gate oxhorn runner.

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