CN211868513U

CN211868513U - Be applied to injection mold's push rod

Info

Publication number: CN211868513U
Application number: CN202020165516.2U
Authority: CN
Inventors: 陈炜煌; 钟达礼
Original assignee: Dongguan Lipu Precision Electronics Co ltd
Current assignee: Dongguan Lipu Precision Electronics Co ltd
Priority date: 2020-02-12
Filing date: 2020-02-12
Publication date: 2020-11-06
Anticipated expiration: 2030-02-12

Abstract

The utility model relates to the technical field of molds, and provides a push rod applied to an injection mold, which comprises a first rod piece and a second rod piece which are coaxial, wherein the first rod piece comprises a first end part and a first rod part which are coaxial, and the first end part is provided with an outer gear ring; the second member is provided with the centre bore along the axis, forms hollow structure, and first pole portion wears to establish in the centre bore, and first end can laminate with the terminal surface of second member. This push rod can be applied to the half opening injection molding that injection mold shaping has the ring gear, the split type first member and the second member that cup joints each other of designing of push rod, the outer ring gear that will be used for the shaping product ring gear sets up on first member alone, therefore, when processing first member, to outer ring gear, can be suitable for wire-electrode cutting processing, compare in the push rod of integrative design, the processing degree of difficulty is little, the time spent is short, and based on the characteristic of wire-electrode cutting processing, ring gear processing can reach higher precision, thereby effectively improve the precision of the ring gear of shaping product.

Description

Be applied to injection mold's push rod

Technical Field

The utility model belongs to the technical field of the mould technique and specifically relates to a be applied to injection mold's push rod is related to.

Background

The half-opening part with the inner gear ring is generally processed and formed in an injection molding mode, and a product is pushed out through a push rod. At present, a forming cavity is arranged on a die, a push rod with an outer gear ring at one end is arranged, the outer gear ring on the push rod is positioned in the forming cavity and used for forming the inner gear ring on a part, and a product is pushed out through the push rod after forming. The outer gear ring is arranged at one end of the push rod, so that the processing difficulty of the push rod is high, a polished rod is usually formed during processing, and then the outer gear ring is processed at one end of the polished rod in a milling or grinding mode, so that the processing is complex, the time consumption is long, and high precision is difficult to realize.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of above-mentioned technical problem. According to the embodiment of the utility model provides a be applied to injection mold's push rod can reduce the processing degree of difficulty, reduces processing man-hour and helps improving the precision of shaping product.

The embodiment of the utility model provides a solve the technical scheme who above-mentioned technical problem took and be:

the embodiment of the utility model provides a be applied to injection mold's push rod for the ring gear of injection molding, including coaxial first member and second member, wherein, first member includes coaxial first tip and first pole portion, first tip is provided with outer ring gear, first pole portion extends along the axis; the second rod piece is provided with a center hole along the axis to form a hollow structure, the first rod piece penetrates through the center hole, and the first end portion can be attached to the end face of the second rod piece.

The utility model discloses a be applied to injection mold's push rod has following beneficial effect at least: this push rod can be applied to the half opening injection molding that injection mold shaping has the ring gear, the split type first member and the second member that cup joints each other of designing of push rod, the outer ring gear that will be used for the shaping product ring gear sets up on first member alone, therefore, when processing first member, to outer ring gear, can be suitable for wire-electrode cutting processing, after the processing is accomplished, in installing the mould together with the second member again, the processing degree of difficulty of outer ring gear on the push rod has been reduced, reduce man-hour, thereby reduce the mould cost, and can make the processing of outer ring gear reach higher precision, thereby guarantee that the product of moulding plastics has the ring gear of higher precision, improve transmission precision and stability.

According to the utility model discloses a be applied to injection mold's push rod of other embodiments, the second member is provided with second pole portion, first end can with the laminating of second pole portion.

According to the utility model discloses a be applied to injection mold's push rod of other embodiments, the biggest external diameter of outer ring gear with the outer warp along equal of second pole portion.

According to the utility model discloses a be applied to injection mold's push rod of other embodiments, first pole portion with centre bore clearance fit.

According to the utility model discloses a be applied to injection mold's push rod of other embodiments, the first end deviates from one side of first pole portion is provided with the shaping boss, the shaping boss coaxial with first pole portion.

According to the utility model discloses a be applied to injection mold's push rod of other embodiments, first pole portion is kept away from the one end of first end sets up the chamfer.

According to other embodiments of the present invention, the second rod comprises a second rod part and a second end part, the second end part is disposed at one end of the second rod part far away from the first end part; the second end portion has an outer diameter greater than the second stem portion, thereby forming a stop step between the second stem portion and the second end portion.

According to the utility model discloses a be applied to injection mold's push rod of other embodiments, the symmetry is provided with a pair of flat position on the second tip.

According to the utility model discloses a be applied to injection mold's push rod of other embodiments, set up the second through-hole that runs through the second tip on the flat position, first pole portion corresponds the position of second through-hole is seted up and is run through the first through-hole of first pole portion.

According to the utility model discloses a be applied to injection mold's push rod of other embodiments, first member with the connection can be dismantled to the second member.

Drawings

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

FIG. 1 is a perspective view of one embodiment of a pushrod for use in an injection mold;

FIG. 2 is an exploded view of the embodiment of FIG. 1;

FIG. 3 is a top view of the embodiment shown in FIG. 1;

fig. 4 is a sectional view a-a in fig. 3.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which function is to supplement the description of the text part of the specification with figures, so that each technical feature and the whole technical solution of the present invention can be understood visually and vividly, but it cannot be understood as a limitation to the scope of the present invention.

In the description of the present invention, if an orientation description is referred to, for example, the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, only for convenience of description and simplification of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. If a feature is referred to as being "disposed," "secured," or "connected" to another feature, it can be directly disposed, secured, or connected to the other feature or be indirectly disposed, secured, or connected to the other feature.

In the description of the present invention, if "a plurality" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "more than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "more than", "less than" or "within" is referred to, it is understood that the number is included. If reference is made to "first", "second", "third", "fourth" and "fifth", this is to be understood as being used for distinguishing between features and not as indicating or implying a relative importance or implicitly indicating the number of indicated features or implicitly indicating the precedence of the indicated features.

In addition, unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Fig. 1 is a perspective view of an embodiment of a push rod applied to an injection mold, fig. 2 is an exploded view of the embodiment shown in fig. 1, fig. 3 is a top view of the embodiment shown in fig. 1, fig. 4 is a sectional view taken along a line a-a in fig. 3, and referring to fig. 1 to 4, the push rod applied to an injection mold of the present embodiment is an annular gear for injection molding an injection molded part, and includes a first rod member 21 and a second rod member 22 which are coaxial, wherein the first rod member 21 includes a first end portion 211 and a first rod portion 212 which are coaxial, the first end portion 211 is provided with an outer annular gear 213, and the first rod portion 212 extends along an axis; the second rod 22 is provided with a central hole 223 along the axis to form a hollow structure, the first rod 212 is inserted into the central hole 223, and the first end 211 can be attached to the end face of the second rod 22. The first pin 21 and the second pin 22 are detachably connected or detachably connected to a core of the mold through a connecting member. The push rod 20 is designed to be separated in the embodiment, the part with the outer gear ring 213 and the polished rod part are split and are respectively arranged on the first rod piece 21 and the second rod piece 22 which are mutually sleeved, therefore, the outer gear ring 213 on the first rod piece 21 can be formed by wire cutting machining, compared with the push rod 20 designed integrally, the machining difficulty is small, the time consumption is short, and based on the characteristics of the wire cutting machining, the gear ring machining can reach higher precision, so that the precision of the inner gear ring of a formed product is effectively improved.

The second rod 22 is provided with a second rod 222, and the first end 211 can be attached to the second rod 222, so that the molding stability of the injection mold is ensured. The maximum outer diameter of the outer gear ring 213 is equal to the outer diameter of the second rod part 222, which is helpful for the inner gear ring of the product to be disengaged.

The first rod portion 212 is a clearance fit with the central aperture 223 to facilitate installation. One side of the first end portion 211 departing from the first rod portion 212 is provided with a molding boss 214, and the molding boss 214 is coaxial with the first rod portion 212 and used for molding an inner step of a product and can abut against an ejector rod of a mold.

The chamfer 215 is disposed at one end of the first rod portion 212 far from the first end portion 211, so that the first rod portion 212 can play a guiding role when being sleeved in the central hole 223 of the second rod member 22, and the installation is convenient.

The second rod 22 comprises a second rod part 222 and a second end part 221, and the second end part 221 is arranged at one end of the second rod 22 far away from the first end part 211; the second end 221 has an outer diameter larger than the second shaft 222 so as to form a retaining step 226 between the second shaft 222 and the second end 221, thereby enabling axial retention of the second pin 22 by the structure of the mold.

The second end 221 is symmetrically provided with a pair of flat positions 224, the second rod 22 can be prevented from rotating after installation, the flat positions 224 are provided with second through holes 225 penetrating through the second end 221, and the first rod part 212 is provided with first through holes 216 penetrating through the first rod part 212 corresponding to the second through holes 225, so that the first rod part 21 and the second rod part 22 can be fixedly connected relatively through the connecting piece, and rotation and axial movement between the first rod part 21 and the second rod part 22 are avoided. The mold is usually provided with a plurality of push rods 20, the first rod 21 and the second rod 22 of each push rod 20 can be independently detachably connected, and can also be simultaneously connected with other structures of the mold through a connecting piece, for example, a connecting shaft passes through the first through hole 216 and the second through hole 225 on each push rod 20, so that the same position of the push rods 20 in the same row is realized, and the consistency of products can be maintained.

The utility model discloses push rod 20, can be applied to the half-opening injection molding that injection mold shaping has the ring gear, this push rod 20 split type design becomes first member 21 and the second member 22 that cup joints each other, the outer ring gear 213 that is used for the shaping product ring gear on the member sets up alone on first member 21, therefore, when processing first member 21, to outer ring gear 213, can be suitable for wire-electrode cutting processing, after the processing is accomplished, together install in the mould with second member 22 again, the processing degree of difficulty of outer ring gear 213 on push rod 20 has been reduced, reduce processing man-hour, thereby reduce the mould cost, and can make the processing of outer ring gear 213 reach higher precision, thereby guarantee that the product of moulding plastics has the ring gear of higher precision, improve transmission precision and stability.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A push rod applied to an injection mold for injection molding of an inner gear ring of an injection molding part is characterized by comprising a first rod piece and a second rod piece which are coaxial, wherein,

the first rod piece comprises a first end part and a first rod part which are coaxial, the first end part is provided with an outer gear ring, and the first rod part extends along an axis;

the second rod piece is provided with a center hole along the axis to form a hollow structure, the first rod piece penetrates through the center hole, and the first end portion can be attached to the end face of the second rod piece.

2. The push rod applied to the injection mold as claimed in claim 1, wherein the second rod member is provided with a second rod portion, and the first end portion is capable of being attached to the second rod portion.

3. The push rod applied to an injection mold according to claim 1, wherein the maximum outer diameter of the outer ring gear is equal to the outer diameter of the outer rim of the second rod portion.

4. The pushrod for use in an injection mold of claim 1, wherein the first rod portion is a clearance fit with the central bore.

5. The push rod applied to the injection mold as claimed in claim 1, wherein a molding boss is provided on a side of the first end portion facing away from the first rod portion, and the molding boss is coaxial with the first rod portion.

6. The push rod for an injection mold according to claim 5, wherein an end of the first rod portion away from the first end is chamfered.

7. The pushrod for use in an injection mold of claim 2, wherein the second rod comprises a second rod portion and a second end portion, the second end portion being disposed on an end of the second rod portion remote from the first end portion; the second end portion has an outer diameter greater than the second stem portion, thereby forming a stop step between the second stem portion and the second end portion.

8. The push rod for an injection mold according to claim 7, wherein the second end portion is symmetrically provided with a pair of flat positions.

9. The push rod applied to the injection mold as claimed in claim 8, wherein the flat portion is provided with a second through hole penetrating through the second end portion, and the first rod portion is provided with a first through hole penetrating through the first rod portion at a position corresponding to the second through hole.

10. The plunger for use in an injection mold of claim 9, wherein the first stem member and the second stem member are removably coupled.