CN209738185U - Injection mould - Google Patents

Abstract

The utility model discloses an injection mold, injection mold includes injecting glue structure and mould body, the mould body is equipped with the die cavity that forms the product, the injecting glue structure is equipped with the intercommunication the first runner of die cavity, the mould body still is equipped with the second runner, the both ends of second runner are equipped with some runner and side runner respectively, the one end of second runner is passed through some runner communicate in first runner, the other end passes through the side runner smooth intercommunication in the die cavity. The technical scheme of the utility model can effectively avoid the production of gas line to improve the appearance quality of product, improve the product percent of pass, reduce energy consumption and process time simultaneously.

Description

Injection mould

Technical Field

The utility model relates to an injection mold technical field, in particular to injection mold.

Background

with the improvement of the living standard of people, the requirement of consumers on the appearance quality of products is higher and higher. At present, when adopting injection mold production working of plastics, often can be because runner, runner thickness and shape design are improper, and the gas line very easily appears in the outward appearance face of plastic products, especially arc outward appearance face, and like this, the appearance quality of product is relatively poor, and the qualification rate of product is lower, also can lead to frequently changing the mould simultaneously, increases energy consumption and process time.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an injection mold aims at effectively avoiding the production of gas line to improve the appearance quality of product, improve the product percent of pass, reduce energy consumption and process time simultaneously.

In order to realize the purpose, the utility model provides an injection mold, including injecting glue structure and mould body, the mould body is equipped with the die cavity that forms the product, the injecting glue structure is equipped with the intercommunication the first runner of die cavity, the mould body still is equipped with the second runner, the both ends of second runner are equipped with some runner and side runner respectively, the one end of second runner is passed through some runner communicate in first runner, the other end passes through the side runner smooth intercommunication in the die cavity.

Optionally, the diameter of the spot gate is 1.5mm to 2.0 mm; and/or the height value of the side gate in the up-down direction is defined as T1, the height value of the second flow passage in the up-down direction is defined as T2, T1+0.5mm is not less than T2 is not less than T1+1 mm; and/or the presence of a gas in the gas,

The height value of the side gate along the up-down direction is defined as T1, and the distance value of the product along the left-right direction is defined as T3, 2/5T3 ≦ T1 ≦ 3/4T 3.

Optionally, the second runner is further provided with a buffer gear, and the buffer gear is located in the side gate.

Optionally, a length value of a smooth transition section between the buffer gear and the cavity is defined as L, and L is greater than or equal to 1.0mm and less than or equal to 1.5 mm.

Optionally, the height value of the side gate along the up-down direction is defined as T1, and the distance value between the buffer gear surface and the inner wall of the side gate is defined as T4, 1/2T1 ≦ T4 ≦ 1/3T 1.

Optionally, the connection between the two sides of the buffer gear and the side gate is in inclined surface transition.

Optionally, an inclination angle of the connection between the buffer gear and the side gate is 35 ° to 45 °.

Optionally, the second flow channel is in a groove shape at the point gate.

Optionally, a junction of the second runner and the side gate is in a slope transition.

Optionally, the angle of inclination at the junction of the second runner and the side gate is 15 ° to 20 °.

The technical scheme of the utility model, injection mold includes injecting glue structure and mould body, and the mould body is equipped with die cavity and second runner, and the injecting glue structure is equipped with the first runner of intercommunication die cavity to, the both ends of second runner are equipped with some runner and side runner respectively, and its one end communicates in first runner through some runner, and the other end communicates in the die cavity through the side runner is level and smooth, so that the sizing material flows through first runner and second runner in proper order and finally flows to the die cavity in. Because the second runner is smoothly communicated with the cavity through the side pouring gate, the rubber can smoothly flow into the cavity of the product, the generation of air lines on the appearance surface of the product is effectively avoided, the appearance quality of the product is improved, the qualification rate of the product is improved, and the energy consumption and the process time are reduced.

drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a partial sectional view of an embodiment of an injection mold according to the present invention;

FIG. 2 is a schematic view of the injection mold of FIG. 1 with the upper and lower molds removed;

FIG. 3 is a schematic cross-sectional view of FIG. 2;

Fig. 4 is a partially enlarged schematic view of fig. 3.

The reference numbers illustrate:

Reference numerals	name (R)	Reference numerals	Name (R)
				100	Injection mould	35	Die cavity
10	Glue injection structure	35a	Product(s)
				11	First flow channel	37	Second flow channel
30	Die body	371	Spot pouring gate
				31	Upper die	373	Side gate
311	Upper die core	375	buffer gear
				33	Lower die core

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

the utility model provides an injection mold 100 for the injection moulding product.

Please refer to fig. 1 to 4, in an embodiment of the injection mold 100 of the present invention, the injection mold 100 includes a glue injection structure 10 and a mold body 30, the mold body 30 is provided with a cavity 35 for forming a product 35a, the glue injection structure 10 is provided with a first runner 11 communicating with the cavity 35, the mold body 30 is further provided with a second runner 37, two ends of the second runner 37 are respectively provided with a point gate 371 and a side gate 373, one end of the second runner 37 is communicated with the first runner 11 through the point gate 371, and the other end is smoothly communicated with the cavity 35 through the side gate 373.

Specifically, the mold body 30 further includes an upper mold 31 and a lower mold (not shown), the upper mold 31 is provided with an upper mold core 311, the lower mold is provided with a lower mold core 33, and when the upper mold 31 and the lower mold are closed, the upper mold core 311 and the lower mold core 33 define a cavity 35 and a second flow passage 37 for forming a product 35 a. The glue injection structure 10 is formed with a first flow channel 11 communicated with the cavity 35 for injecting the plastic material. The two ends of the second runner 37 are respectively provided with a dot gate 371 and a side gate 373, and are communicated with the first runner 11 through the dot gate 371 and smoothly communicated with the cavity 35 through the side gate 373, so that the rubber material flows through the second runner 37 from the first runner 11 and finally flows into the cavity 35 to be molded into a product by injection.

The utility model discloses mainly revise the shape of second runner 37, will incline runner 373 smooth transition and communicate in die cavity 35, so setting, when the sizing material flow to with the position of product 35a outward appearance face contact, then can not appear the high or low excessively of temperature to can avoid the outward appearance face to produce bright gas line effectively. For example, if the thickness of the gate 371 is 1.5mm, or 1.8mm, or 2.0mm, and if the thickness of the gate 371 is less than 1.5mm, the shearing heat generated by the glue at the gate 371 is too high, and when the glue flows to the position contacting with the appearance surface of the product 35a, the appearance surface of the product 35a is easy to generate bright air marks; if the thickness of the point gate 371 is larger than 2.0mm, the demoulding operation is difficult to break after the manufacture is finished, the section is not flat, and more glue material is remained.

Therefore, it can be understood that, the technical scheme of the utility model, injection mold 100 includes injecting glue structure 10 and mould body 30, mould body 30 is equipped with die cavity 35 and second runner 37, injecting glue structure 10 is equipped with the first runner 11 that communicates die cavity 35, and, the both ends of second runner 37 are equipped with some runner 371 and side runner 373 respectively, and its one end communicates in first runner 11 through some runner 371, and the other end communicates in die cavity 35 through side runner 373 is level and smooth, so that the sizing material flows through first runner 11 and second runner 37 in proper order and finally flows to in the die cavity 35. Because the second runner 37 is smoothly communicated with the cavity 35 through the side gate 373, the rubber can smoothly flow into the cavity 35 of the product, so that the generation of air lines on the appearance surface of the product 35a is effectively avoided, the appearance quality of the product 35a is improved, the qualification rate of the product 35a is improved, and the energy consumption and the process time are reduced.

Optionally, the spot gate 371 has a diameter of 1.5mm to 2.0 mm. The thickness of the point gate 371 is set to be 1.5mm to 2.0mm, the rubber can be effectively ensured to obtain proper shearing heat at the point gate 371, and when the rubber flows to the position contacted with the appearance surface of the product 35a, the temperature cannot be too high or too low, so that the generation of bright air patterns on the appearance surface can be effectively avoided. For example, if the thickness of the gate 371 is 1.5mm, or 1.8mm, or 2.0mm, and if the thickness of the gate 371 is less than 1.5mm, the shearing heat generated by the glue at the gate 371 is too high, and when the glue flows to the position contacting with the appearance surface of the product 35a, the appearance surface of the product 35a is easy to generate bright air marks; if the thickness of the point gate 371 is larger than 2.0mm, the demoulding operation is difficult to break after the manufacture is finished, the section is not flat, and more glue material is remained.

Referring to FIG. 4 again, the height of the side gate 373 in the vertical direction is defined as T1, the height of the second flow channel 37 in the vertical direction is defined as T2, T1+0.5mm ≦ T2 ≦ T1+1 mm.

The utility model discloses second runner 37 is right along the ascending value of height of upper and lower side selection, and second runner 37 sets up to be greater than side runner 373 along the ascending 0.5mm to 1mm of height of upper and lower side along the ascending height of upper and lower side along ascending height, for example, the two difference in height is 0.5mm, or 0.8mm, or 1 mm. If the height difference between the two is more than 1mm, the rubber material is difficult to cool, and the molding cycle of the product 35a is affected; if the height difference between the two is less than 0.5mm, the rubber material is cooled quickly, which is not beneficial to pressure maintaining and feeding of the product 35a, and the appearance surface of the product 35a is easy to shrink and generate air wrinkles and the like.

Further, the height of the side gate 373 in the up-down direction is defined as T1, and the distance value of the product 35a in the left-right direction is defined as T3, 2/5T3 ≦ T1 ≦ 3/4T 3. The height of the side gate 373 in the vertical direction is also set to be proper, so that the rubber can smoothly flow to the position in contact with the appearance surface of the product 35a through the side gate 373, and air wrinkles are not easily generated. For example, the height value of the side gate 373 in the up-down direction is 2/5, 1/3, or 3/4 which is the distance value of the product 35a in the left-right direction. Preferably, the height value of the side gate 373 in the up-down direction is 1/3 of the distance value of the product 35a in the left-right direction.

In an embodiment of the present invention, the second runner 37 is further provided with a buffering step 375, and the buffering step 375 is located in the side gate 373. Specifically, the buffer gear 375 is arranged in the middle of the side gate 373, and the arrangement of the buffer gear 375 can buffer the rubber material in the flowing process, so that the rubber material is effectively prevented from rapidly rushing into the cavity 35 at a time to generate air marks. Of course, the buffer position 375 may also be disposed adjacent to the end of the side gate 373.

Referring to FIG. 4 again, the length of the smooth transition section between the buffer stage 375 and the cavity 35 is defined as L, where L is greater than or equal to 1.0mm and less than or equal to 1.5 mm. The length of the smooth transition between the buffer gear 375 and the cavity 35 is set to be appropriate to ensure that the rubber material can smoothly enter the cavity 35, thereby effectively avoiding the formation of the appearance surface air wrinkles. For example, if L is 1.0mm, or 1.2mm, or 1.5mm, if L is less than 1.0mm, the rubber material will quickly rush into the cavity 35, and air marks are easily generated; if L is greater than 1.5mm, the injection molding efficiency is affected.

Referring to FIG. 4 again, the height of the side gate 373 along the vertical direction is defined as T1, and the distance between the surface of the buffer position 375 and the inner wall of the side gate 373 is defined as T4, 1/2T1 ≦ T4 ≦ 1/3T 1. The height of the buffer position 375 is smaller than that of the side gate 373, and generally, T4 is 1/2 or 1/3 of T1, so as to ensure that the buffer position 375 has a better buffer effect. If T4 is too small, the buffering effect is not obvious; if T4 is too large, the flow of the compound will be restricted, which can easily cause shrinkage and air marks on the appearance of the product 35 a.

Further, the connection between the two sides of the buffer position 375 and the side gate 373 is an inclined transition. So set up, can all be in the same direction as smooth connection with side runner 373 for the both sides of buffering gear 375 to make the sizing material can gently flow through buffering gear 375, in order to assist in the sizing material can gently flow to die cavity 35, and then avoid the gas line to produce effectively.

Alternatively, the angle of inclination at the junction of the buffer position 375 and the side gate 373 is 35 ° to 45 °. The inclination angle of the connection position between the buffer gear 375 and the side gate 373 is set to be suitable, so that the rubber material can smoothly flow through the buffer gear 375, and the rubber material can smoothly flow into the cavity 35 in an auxiliary manner, thereby effectively avoiding the generation of air marks. For example, the inclination angle of the connection between the gate and the side gate 373 is 35 °, or 40 °, or 45 °.

In an embodiment of the present invention, the second flow channel 37 is recessed at the spot-pouring opening 371. The second flow channel 37 is designed to be in an inner groove shape, when the product 35a is subjected to injection molding and demolding, the point pouring opening 371 is disconnected, the second flow channel 37 does not protrude out of the surface of the product 35a, the assembly of the product 35a is not affected, and the second flow channel 37 does not need to be cut off. Preferably, the second flow channel 37 is in the shape of an inner concave arc groove at the point-casting opening 371, so that the appearance is attractive and the processing and manufacturing are more convenient.

Further, the junction between the second runner 37 and the side gate 373 is in a slope transition. With the arrangement, the sizing material in the second flow channel 37 can smoothly transit to the side gate 373 along the inclined surface, so that the smooth flowing of the sizing material is ensured, and the occurrence of air wrinkles caused when the sizing material flows into the cavity 35 is effectively avoided.

Alternatively, the inclination angle at the junction of the second flow channel 37 and the side gate 373 is 15 ° to 20 °. The second flow channel 37 is configured as a concave arc groove and transitions to the side gate 373 at a small angle, so that the glue in the second flow channel 37 substantially fills the transition area and flows smoothly to the side gate 373. For example, an inclination angle of 15 ° or 20 ° is adopted at the junction of the second flow path 37 and the side gate 373.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. The utility model provides an injection mold, its characterized in that, injection mold includes injecting glue structure and mould body, the mould body is equipped with the die cavity that forms the product, the injecting glue structure is equipped with the intercommunication the first runner of die cavity, the mould body still is equipped with the second runner, the both ends of second runner are equipped with some runner and side runner respectively, the one end of second runner pass through some runner communicate in first runner, the other end pass through side runner smooth intercommunication in the die cavity.

2. The injection mold of claim 1, wherein the diameter of the point gate is 1.5mm to 2.0 mm; and/or the presence of a gas in the gas,

Defining the height value of the side gate in the up-down direction as T1, the height value of the second flow passage in the up-down direction as T2, T1+0.5mm ≤ T2 ≤ T1+1 mm; and/or the presence of a gas in the gas,

The height value of the side gate along the up-down direction is defined as T1, and the distance value of the product along the left-right direction is defined as T3, 2/5T3 ≦ T1 ≦ 3/4T 3.

3. The injection mold of claim 1, wherein the second runner is further provided with a buffer level, the buffer level being located in the side gate.

4. an injection mould according to claim 3, characterised in that the length of the smooth transition between the buffer gear and the cavity is defined by a value L, 1.0mm L1.5 mm.

5. The injection mold according to claim 3, wherein a height value of the side gate in the up-down direction is defined as T1, and a distance value of the damper step surface from the inner wall of the side gate is defined as T4, 1/2T 1T 4T 1/3T 1.

6. The injection mold of claim 3, wherein the connection between the two sides of the buffer gear and the side gate is in a slope transition.

7. The injection mold of claim 3, wherein the angle of inclination of the bumper step at the junction with the side gate is from 35 ° to 45 °.

8. An injection mould according to any one of claims 1 to 7 wherein the second runner is fluted at the spot gate.

9. The injection mold of claim 8, wherein the junction of the second runner and the side gate transitions as an inclined plane.

10. The injection mold of claim 9, wherein the angle of inclination of the second runner and the side gate junction is 15 ° to 20 °.