CN216032245U

CN216032245U - Injection mold without thimble seal

Info

Publication number: CN216032245U
Application number: CN202121773252.XU
Authority: CN
Inventors: 王耀晶; 袁先锋; 吴勇
Original assignee: Huizhou Xinyuda Technology Co ltd
Current assignee: Huizhou Xinyuda Technology Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-03-15
Anticipated expiration: 2031-07-30

Abstract

The utility model relates to the field of injection molds and discloses an injection mold without a thimble print, which comprises a front template, a rear template, a front mold core, a rear mold core, a sliding assembly and an ejection assembly, wherein the front template and the rear template are embedded, the front mold core is arranged on the front template, the rear mold core is arranged on the rear template, the front mold core and the rear mold core jointly enclose a mold cavity, the mold cavity is used for molding a product, the sliding assembly comprises a sliding block, the sliding block is connected onto the rear template in a sliding manner, one side of the sliding block is provided with a supporting part, the supporting part is embedded with the side edge of the product, the supporting part abuts against the side edge of the rear mold core in a mold closing state, the ejection assembly comprises a thimble and an ejection panel, the lower end of the thimble is connected onto the ejection panel, the upper end of the thimble is movably arranged on the rear mold core, the upper end of the thimble is arranged below the supporting part, and a clearance is arranged between the upper end of the thimble and the supporting part in the mold closing state. This injection mold can avoid leaving thimble seal on injection moulding product surface, improves injection moulding product quality.

Description

Injection mold without thimble seal

Technical Field

The utility model relates to the field of injection molds, in particular to an injection mold without an ejector pin seal.

Background

When the injection mold opens the mold, directly contact with the shaping product through the thimble, the application of force is in order ejecting in the product, just the shaping just because the product, still not cooling the solidification completely, and ejecting thimble can leave the thimble seal on the product surface this moment, not only can influence the product outward appearance, still can influence the assembly of product and other some functions of other objects. Moreover, the injection mold needs to be matched with the glue sealing of the thimble and the mold core, and the thimble is easy to burn due to larger friction between the thimble and the mold core.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides the injection mold without the thimble marks, which can avoid the thimble marks left on the surface of an injection product and improve the quality of the injection product.

The purpose of the utility model is realized by the following technical scheme:

an injection mold without a thimble mark comprises a front template, a rear template, a front mold core, a rear mold core, a sliding assembly and an ejection assembly, wherein the front template is embedded with the rear template, the front mold core is arranged on the front template, the rear mold core is arranged on the rear template, the front mold core and the rear mold core jointly enclose a mold cavity, the mold cavity is used for molding a product, the sliding assembly comprises a sliding block, the sliding block is connected on the rear template in a sliding manner, one side of the sliding block is provided with a supporting part, the supporting part is embedded with the side edge of the product, the supporting part is abutted against the side edge of the rear mold core in a mold closing state, the ejection assembly comprises a thimble and an ejection panel, the lower end of the thimble is connected on the ejection panel, the upper end of the thimble is movably arranged on the rear mold core, and the upper end of the thimble is arranged below the supporting part, and in a die assembly state, a clearance is arranged between the upper end of the ejector pin and the supporting part.

In one embodiment, the ejection assembly further comprises a nut, the lower end of the ejector pin is provided with a locking portion, and the locking portion is locked with the ejection panel through the nut.

In one embodiment, the circumferential wall of the upper end of the thimble is recessed inwards to form a flat thimble portion.

In one embodiment, the diameter of the thimble becomes smaller along the direction from bottom to top, and the diameter of the through hole is larger than the diameter of the upper end of the thimble.

In one embodiment, the rear template is provided with a through hole for the upper end of the thimble to move.

In one embodiment, the ejection assembly further comprises an ejection bottom plate and an ejector rod sleeve, the ejection bottom plate is connected to the lower end of the ejection panel, and the ejector rod sleeve is connected to the lower end of the ejection bottom plate.

In one embodiment, the ejector assembly further comprises a bolt, and the ejector rod sleeve is locked with the ejector base plate through the bolt.

In one embodiment, the sliding assembly further includes an inclined guide post and a fixing block, the inclined guide post is connected to the slider, and the inclined guide post is connected to the front mold plate through the fixing block.

In one embodiment, the sliding assembly further comprises a guide block and a pressing strip, two ends of the pressing strip respectively abut against the rear template and the sliding block, and the guide block is arranged on the rear template and meshed with the sliding block.

In one embodiment, the slide assembly further comprises a wear block disposed on a side of the slide block adjacent to the front platen.

Compared with the prior art, the utility model has at least the following advantages:

the injection mold does not need to consider the product structure to put down the ejector pins like the traditional injection mold, does not need to be matched with the glue sealing of the ejector pins and the mold core, has the characteristics of simple structure, higher applicability and good ejection effect, and can avoid leaving the ejector pin marks on the surface of the product, thereby improving the appearance and the quality of the product and also improving the injection molding efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a cross-sectional view of an injection mold without a thimble print according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of an injection mold without a top imprint according to an embodiment of the present invention.

Fig. 3 is a partial structural view of an injection mold without a thimble print according to an embodiment of the present invention.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

One embodiment, referring to fig. 1 and fig. 2, an injection mold 10 without a thimble print includes a front mold plate 110, a front mold core 111, a rear mold plate 120, a rear mold core 121, a sliding assembly 130, and an ejection assembly 140, where the front mold plate 110 is embedded in the rear mold plate 120, the front mold core 111 is disposed on the front mold plate 110, the rear mold core 121 is disposed on the rear mold plate 120, the front mold core 111 and the rear mold core 121 together form a mold cavity, the mold cavity is used for molding a product 20, the sliding assembly 130 includes a slider 131, the slider 131 is slidably connected to the rear mold plate 120, one side of the slider 131 is provided with a support portion 1311, the support portion 1311 is embedded in a side edge of the product 20, the support portion 1311 abuts against a side edge of the rear mold core 121 in a mold closing state, the ejection assembly 140 includes a thimble 141 and an ejection panel 142, a lower end of the thimble 141 is connected to the ejection panel 142, the upper end of the thimble 141 is movably disposed on the rear mold insert 121, the upper end of the thimble 141 is disposed below the supporting portion 1311, and a clearance 30 is disposed between the upper end of the thimble 141 and the supporting portion 1311 in a mold closing state.

The working process or principle of the injection mold 10 is as follows: after the product 20 is molded, after the front mold plate 110 and the rear mold plate 120 are opened, the front mold core 111 and the rear mold core 121 are separated, the slide block 131 is controlled to withdraw, and after the slide block 131 completely withdraws (or reaches a certain stroke), the ejection panel 142 is controlled to drive the ejector pin 141 to move upwards, and after the slide block 131 moves to a certain distance, the ejector pin 141 is contacted with the product 20 to eject, and at this time, the product 20 is completely cured and molded, so the ejector pin 141 print cannot be left on the surface of the product 20 by the injection mold 10, and the appearance and the quality of the product 20 are improved. The injection mold 10 does not need to consider the structure of the product 20 to put down the thimble 141 like the traditional injection mold 10, and does not need to match the thimble 141 with the glue sealing of the mold core, has the characteristics of simple structure, higher applicability and good ejection effect, and can avoid the thimble 141 print left on the surface of the product 20, thereby improving the appearance and the quality of the product 20 and also improving the injection molding efficiency.

Further, the ejection assembly 140 further includes a nut, a lower end of the thimble 141 is provided with a locking portion 1412, and the locking portion 1412 is locked with the ejection panel 142 by the nut.

Further, the circumferential wall of the upper end of the thimble 141 is recessed inwards to form a flat needle portion 1411, so that the area of the thimble 141 can be reduced, and the contact area between the thimble 141 and the product 20 can be reduced, and the contact area between the thimble 141 and the rear mold core 121 can be reduced.

Further, the diameter of the thimble 141 is gradually reduced along the direction from bottom to top, so that the area of the thimble 141 can be reduced, and the contact area between the thimble 141 and the product 20 is reduced, and the contact area between the thimble 141 and the rear mold core 121 is reduced.

Further, the rear mold plate 120 is provided with a through hole 1211 through which the upper end of the thimble 141 moves. In order to prevent friction between the pin 141 and the mold core, the diameter of the through hole 1211 may be larger than the diameter of the upper end of the pin 141, so as to prevent the pin 141 from being easily burned due to the large friction between the pin 141 and the mold core.

Further, the ejection assembly 140 further includes a buffer rubber sleeve, and the buffer rubber sleeve is sleeved outside the upper end of the thimble 141. Thus, the acting force between the thimble 141 and the product 20 is buffered by the buffer rubber sleeve, so as to protect the thimble 141 and the product 20. For example, the cushion gum cover is a TPU (thermoplastic polyurethane elastomer) gum cover, and has good flexibility and elasticity. For example, the thickness of the buffer rubber sleeve is 0.5 mm-2 mm.

Further, the ejection assembly 140 further includes an ejection base plate 143 and an ejector sleeve, the ejection base plate 143 is connected to the lower end of the ejection panel 142, and the ejector sleeve is connected to the lower end of the ejection base plate 143. Thus, the ejector pin of the injection molding machine is connected to the ejector pin sleeve, and drives the ejector base plate 143 to push the ejector pin 141 to eject the product 20. Further, the ejection assembly 140 further includes a bolt, and the ejector rod sleeve is locked with the ejection base plate 143 by the bolt.

Further, referring to fig. 3, the sliding assembly 130 further includes an inclined guide post 132 and a fixing block 133, the inclined guide post 132 is connected to the sliding block 131, and the inclined guide post 132 is connected to the front mold plate 110 through the fixing block 133. Thus, when the front mold plate 110 and the rear mold plate 120 are opened, the inclined guide posts 132 are pulled apart to drive the slide blocks 131 to move laterally to separate from the product 20.

Further, the sliding assembly 130 further includes a guide block 134 and a pressing bar 135, two ends of the pressing bar 135 respectively abut against the rear mold plate 120 and the sliding block 131, and the guide block 134 is disposed on the rear mold plate 120 and engaged with the sliding block 131. In this way, the guide block 134 and the pressing bar 135 can limit and guide the moving direction of the sliding block 131.

Further, the sliding assembly 130 further includes a wear-resistant block 136, and the wear-resistant block 136 is disposed on a side surface of the sliding block 131 close to the front mold plate 110. In this manner, the slide 131 is prevented from rubbing against the front mold plate 110 by the wear block 136.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An injection mold without a thimble print is characterized by comprising a front template, a rear template, a front mold core, a rear mold core, a sliding assembly and an ejection assembly, wherein the front template and the rear template are embedded, the front mold core is arranged on the front template, the rear mold core is arranged on the rear template, the front mold core and the rear mold core jointly enclose a mold cavity, the mold cavity is used for molding a product, the sliding assembly comprises a sliding block, the sliding block is connected on the rear template in a sliding manner, one side of the sliding block is provided with a supporting part, the supporting part is embedded with the side edge of the product, the supporting part abuts against the side edge of the rear mold core in a mold closing state, the ejection assembly comprises a thimble and an ejection panel, the lower end of the thimble is connected to the ejection panel, the upper end of the thimble is movably arranged on the rear mold core, and the upper end of the thimble is arranged below the supporting part, and in a die assembly state, a clearance is arranged between the upper end of the ejector pin and the supporting part.

2. The injection mold without the ejector pin stamp as recited in claim 1, wherein the ejector assembly further comprises a nut, the lower end of the ejector pin is provided with a locking portion, and the locking portion is locked with the ejector panel through the nut.

3. The injection mold without a thimble print of claim 1, wherein a peripheral wall of an upper end of the thimble is recessed inwardly to form a flat needle portion.

4. The injection mold without the ejector pin stamp as recited in claim 1, wherein the diameter of the ejector pin is gradually reduced in a direction from bottom to top.

5. The injection mold without the ejector pin stamp as recited in claim 1, wherein the rear mold plate is provided with a through hole for moving an upper end of the ejector pin.

6. The injection mold without the ejector pin stamp as recited in claim 1, wherein the ejector assembly further comprises an ejector base plate and an ejector rod sleeve, the ejector base plate is connected to a lower end of the ejector plate, and the ejector rod sleeve is connected to a lower end of the ejector base plate.

7. The injection mold without the ejector pin stamp of claim 6, wherein the ejector assembly further comprises a bolt, and the ejector rod sleeve is locked with the ejector base plate by the bolt.

8. The injection mold without the thimble print of claim 1, wherein the sliding assembly further comprises an inclined guide post and a fixing block, the inclined guide post is connected to the sliding block, and the inclined guide post is connected to the front mold plate through the fixing block.

9. The injection mold without the thimble print according to claim 1, wherein the sliding assembly further comprises a guide block and a pressing bar, two ends of the pressing bar respectively abut against the rear mold plate and the slide block, and the guide block is disposed on the rear mold plate and engaged with the slide block.

10. The injection mold without the ejector pin stamp as recited in claim 1, wherein the sliding assembly further comprises a wear-resistant block, the wear-resistant block being disposed on a side surface of the slider adjacent to the front mold plate.