Submarine gate anti-fly delay ejection structure for mold
By designing the latent gate bulletproof flight delay ejection structure, the two-stage travel movement of the runner rubber column sleeve and inverted cone block is used to solve the problem of mold damage caused by the latent gate flash, and the effect of saving raw material costs and reducing maintenance costs is achieved.
Patent Information
- Application Number
- CN202421369443.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-06-14
AI Technical Summary
In the prior art, the submerged gate bolts cause damage to the mold and requires interruption of production for repair, wasting raw materials and increasing maintenance costs.
A latent gate bulletproof flight delay ejection structure is designed, including a runner rubber column sleeve, a latent gate runner, an inverted cone block and a runner thimble. The inverted cone block is removed from the runner rubber column sleeve through two-stage stroke movement, achieving stable ejection of the latent gate runner.
It shortens the height requirement for the fixing of the runner bottom glue column, saves raw material costs, avoids gate bouncing and mold damage, and reduces maintenance costs.
Smart Images
Figure CN222571469U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of molds, in particular to a submerged gate bulletproof and delayed ejection structure for molds. Background Art
[0002] In plastic molds, in order to facilitate automatic production to avoid secondary trimming of the runner into water, or for products that require water entry from the B side due to surface appearance requirements, submerged gates are often used. Since this type of gate is forcibly deformed and separated from the product, it is often necessary to add a very high auxiliary glue column at the bottom of the runner to position it. After leaving the mold cavity, the gate will bounce off due to the rebound force of the deformed demolding plastic. At this time, the mold is in a separated state, and the gate is very easy to get stuck in the mold structure. If it is ignored and the mold is directly pressed, it will cause damage to the mold, which requires interrupting production for repairs, which not only wastes plastic raw materials, but also increases the risk of mold damage and repair costs. Utility Model Content
[0003] In view of the above technical problems, the utility model provides a delayed ejection structure for a submerged gate to prevent flying of a mold, so as to solve the problem of damage to the mold caused by flying of the submerged gate in the prior art.
[0004] Other features and advantages of the present disclosure will become apparent from the following detailed description, or may be learned in part by the practice of the present disclosure.
[0005] The utility model discloses a bulletproof delayed ejection structure for a submerged gate of a mold, the structure comprising a runner glue column sleeve, the runner glue column sleeve is limited in stroke to pass through the rear mold core of the mold and is connected to the submerged gate runner, the submerged gate runner is provided with an inverted cone block, the inverted cone block is elastically limited in the runner glue column sleeve, a runner ejector is arranged in the runner glue column sleeve, the runner ejector is used to drive the submerged gate runner to perform two-stage stroke movement, in the first stage of stroke movement, the submerged gate runner is stationary when the runner glue column sleeve moves to the stroke limit position, and in the second stage of stroke movement, the inverted cone block is separated from the runner glue column sleeve to make the submerged gate runner fall off.
[0006] Furthermore, a cup head is provided at the bottom of the runner rubber column sleeve, and a groove for limiting the cup head is formed in the rear mold core.
[0007] Furthermore, a semicircular groove for supporting the submerged gate runner is provided on the top of the runner rubber column sleeve. Based on the semicircular groove, the stability of the submerged gate runner during ejection is improved.
[0008] Furthermore, the stroke length of the runner rubber column sleeve is equal to the submerged gate size of the submerged gate runner.
[0009] Furthermore, the runner rubber column sleeve is provided with an undercut groove for limiting the inverted cone block. The inverted cone block is limited based on the undercut groove, and at the same time, the undercut groove also facilitates the inverted cone block to escape from the limit, thereby entering the second stroke movement.
[0010] The technical solution disclosed in this disclosure has the following beneficial effects:
[0011] Shortening the height requirement for fixing the runner bottom glue column saves raw material costs, solves the problem of gate flying, effectively avoids the risk of damage to the mold due to compression molding, and reduces the maintenance cost of the mold. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of the ejection structure in the embodiment of this specification;
[0013] Figure 2 for Figure 1 Schematic diagram of the decomposition structure;
[0014] Figure 3 It is a schematic diagram of the structure of some components of the embodiment of this description;
[0015] Figure 4 for Figure 3 Schematic diagram of the decomposition structure;
[0016] Figure 5 A cross-sectional view of the ejection structure in the initial state in the embodiment of this specification;
[0017] Figure 6 It is a cross-sectional view of the ejection structure in the first stroke movement in the embodiment of this specification;
[0018] Figure 7 It is a cross-sectional view of the ejection structure in the embodiment of this specification during the second stroke movement.
[0019] Wherein, the accompanying drawings are described as follows:
[0020] 1. Runner rubber column sleeve; 11. Cup head; 12. Semicircular groove; 2. Back mold core; 21. Slot; 3. Submerged gate runner; 31. Submerged gate; 4. Inverted cone block; 5. Runner ejector pin; 6. Finished product. DETAILED DESCRIPTION
[0021] Example embodiments will now be described more fully with reference to the accompanying drawings.
[0022] The accompanying drawings are only schematic illustrations of the present disclosure. The same reference numerals in the drawings represent the same or similar parts, and thus their repeated description will be omitted. It is understood that the proportions of the various components in the drawings do not constitute limitations of the present disclosure.
[0023] like Figure 1-4As shown, an embodiment of the present specification provides a bulletproof delayed ejection structure for a submerged gate 31 of a mold, the structure comprising a runner rubber column sleeve 1, the runner rubber column sleeve 1 passes through the rear mold core 2 of the mold with a stroke limit and is connected to the submerged gate runner 3, the submerged gate runner 3 is provided with an inverted cone block 4, the inverted cone block 4 is elastically limited in the runner rubber column sleeve 1, a runner ejector pin 5 is provided in the runner rubber column sleeve 1, the runner ejector pin 5 is used to drive the submerged gate runner 3 to perform a two-stage stroke movement, in the first stage of the stroke movement, the submerged gate runner 3 is stationary when the runner rubber column sleeve 1 moves to the stroke limit position, and in the second stage of the stroke movement, the inverted cone block 4 is separated from the runner rubber column sleeve 1 and the submerged gate runner 3 falls off.
[0024] A cup head 11 is provided at the bottom of the runner rubber column sleeve 1 , and a groove 21 for limiting the cup head 11 is formed in the rear mold core 2 .
[0025] The top of the runner rubber column sleeve 1 is provided with a semicircular groove 12 for carrying the submerged gate runner 3. Based on the semicircular groove 12, the stability of the submerged gate runner 3 during the ejection process is improved.
[0026] The stroke length of the runner rubber column sleeve 1 is equal to the size of the submerged gate 31 of the submerged gate runner 3 .
[0027] The runner rubber column sleeve 1 is provided with an undercut groove for limiting the inverted cone block 4. The inverted cone block 4 is limited based on the undercut groove, and at the same time, the undercut groove also facilitates the inverted cone block 4 to escape from the limit, thereby entering the second stroke movement.
[0028] Working principle:
[0029] like Figure 5-7 As shown, the utility model is provided with a flow channel rubber column sleeve 1, and an inverted buckle is made inside the flow channel rubber column sleeve 1. Figure 5 As shown, when the mold is ejected, the runner ejector pin 5 exerts force, and the inverted cone block 4 of the sub-gate runner 3 drives the runner rubber column sleeve 1 to be ejected together until it is separated from the product 6 and the cavity. At this time, since the undercut groove of the runner rubber column sleeve 1 is fixed, the sub-gate runner 3, the runner ejector pin 5, and the runner rubber column sleeve 1 form a relative static motion, and the inverted cone block 4 is fixed in the undercut groove in the runner rubber column sleeve 1 and cannot fly. This belongs to the first movement stage. Figure 6 As shown; when the runner ejector pin 5 continues to be ejected, the cup head groove of the runner rubber column sleeve 1 is limited by the groove 21 of the rear mold core 2, and it will not continue to move. At this time, the runner ejector pin 5 continues to be ejected until the inverted cone block 4 falls off the undercut groove, and then separates from the runner rubber column sleeve 1, and falls after separation. This is the second stroke movement, as shown in FIG. Figure 7 In this process, due to the existence of buffering, the sub-gate runner 3 will not be bounced, thus solving the gate bounce problem.
[0030] Beneficial effects:
[0031] Shortening the height requirement for fixing the runner bottom glue column saves raw material costs, solves the problem of gate flying, effectively avoids the risk of damage to the mold due to compression molding, and reduces the maintenance cost of the mold.
[0032] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure.
Claims
1. A bulletproof delayed ejection structure of a sub-gate for a mold, characterized in that: The structure includes a runner glue column sleeve, which passes through the rear mold core of the mold with a stroke limit and is connected to the submerged gate runner. The submerged gate runner is provided with an inverted cone block, and the inverted cone block is elastically limited in the runner glue column sleeve. A runner ejector is provided in the runner glue column sleeve, and the runner ejector is used to drive the submerged gate runner to perform two-stage stroke movement. In the first stage of stroke movement, the submerged gate runner is stationary when the runner glue column sleeve moves to the stroke limit position. In the second stage of stroke movement, the inverted cone block is separated from the runner glue column sleeve to cause the submerged gate runner to fall off.
2. The bulletproof delayed ejection structure of a subgate for a mold according to claim 1, characterized in that: A cup head is arranged at the bottom of the runner rubber column sleeve, and a groove for limiting the cup head is formed in the rear mold core.
3. The bulletproof delayed ejection structure of a subgate for a mold according to claim 1, characterized in that: A semicircular groove for supporting the submerged gate runner is arranged on the top of the runner rubber column sleeve.
4. The bulletproof delayed ejection structure of a subgate for a mold according to claim 1, characterized in that: The stroke length of the runner rubber column sleeve is equal to the submerged gate size of the submerged gate runner.
5. The bulletproof delayed ejection structure of a subgate for a mold according to claim 1, characterized in that: An undercut groove for limiting the position of the inverted cone block is arranged inside the runner rubber column sleeve.